WO2022113436A1 - Bonded member and method for manufacturing same - Google Patents
Bonded member and method for manufacturing same Download PDFInfo
- Publication number
- WO2022113436A1 WO2022113436A1 PCT/JP2021/029804 JP2021029804W WO2022113436A1 WO 2022113436 A1 WO2022113436 A1 WO 2022113436A1 JP 2021029804 W JP2021029804 W JP 2021029804W WO 2022113436 A1 WO2022113436 A1 WO 2022113436A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal member
- metal
- joining
- brazing material
- sheet
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 334
- 239000002184 metal Substances 0.000 claims abstract description 334
- 239000000463 material Substances 0.000 claims abstract description 277
- 238000005219 brazing Methods 0.000 claims abstract description 190
- 238000005304 joining Methods 0.000 claims description 118
- 230000008018 melting Effects 0.000 claims description 73
- 238000002844 melting Methods 0.000 claims description 73
- 239000010953 base metal Substances 0.000 claims description 57
- 238000003466 welding Methods 0.000 claims description 49
- 239000000945 filler Substances 0.000 claims description 43
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000009751 slip forming Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 description 42
- 229910045601 alloy Inorganic materials 0.000 description 15
- 239000000956 alloy Substances 0.000 description 15
- 210000001503 joint Anatomy 0.000 description 14
- 230000008569 process Effects 0.000 description 13
- 238000000879 optical micrograph Methods 0.000 description 11
- 238000007711 solidification Methods 0.000 description 8
- 230000008023 solidification Effects 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 7
- 239000010408 film Substances 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000011162 core material Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000009972 noncorrosive effect Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229910018125 Al-Si Inorganic materials 0.000 description 3
- 229910018520 Al—Si Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- SKFYTVYMYJCRET-UHFFFAOYSA-J potassium;tetrafluoroalumanuide Chemical compound [F-].[F-].[F-].[F-].[Al+3].[K+] SKFYTVYMYJCRET-UHFFFAOYSA-J 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910018131 Al-Mn Inorganic materials 0.000 description 2
- 229910018461 Al—Mn Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000012768 molten material Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018137 Al-Zn Inorganic materials 0.000 description 1
- 229910018182 Al—Cu Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- 229910018573 Al—Zn Inorganic materials 0.000 description 1
- 229910018571 Al—Zn—Mg Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910017758 Cu-Si Inorganic materials 0.000 description 1
- 229910017931 Cu—Si Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910019064 Mg-Si Inorganic materials 0.000 description 1
- 229910019406 Mg—Si Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/005—Soldering by means of radiant energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/211—Bonding by welding with interposition of special material to facilitate connection of the parts
Definitions
- the present invention relates to a joining member and a method for manufacturing the same.
- brazing is a method of melting a brazing material made of an alloy having a melting point lower than that of the material to be joined (base material) and using this as an adhesive to join the member to be joined without melting it.
- Techniques such as in-fire brazing and torch brazing are used to melt the brazing material.
- Brazing in a furnace is a method of putting parts in a furnace and heating the whole to perform brazing
- torch brazing method is a method of locally heating parts using a gas torch and brazing. Is.
- Patent Document 1 describes a brazing step of brazing a plurality of metal members by laser brazing using a flux and a brazing material, and a high frequency of removing the flux remaining on the surface of the brazed portion.
- a method for manufacturing a metal bonding member having a laser pulse irradiation step and a chemical conversion treatment step of performing a chemical conversion treatment including a brazed portion is disclosed (claim 1 of Patent Document 1).
- Laser welding is a method of irradiating a joint portion of a member to be joined with high-energy laser light to melt-join the member, and is different from brazing in that the member to be joined itself is melted.
- Laser welding is characterized by being capable of high-speed welding and having little thermal deformation, and is used, for example, when joining aluminum alloy members to manufacture automobile members and battery cases.
- Patent Document 2 describes a method of joining an aluminum-based welded material and an iron-based welded material having a zinc-based coating layer on the surface to different materials by laser welding without using a brazing material.
- Patent Document 3 describes that an aluminum alloy plate for a battery case containing Fe, Mn, Ti and Zr is laser-welded by irradiating it with a pulsed laser (claim 1, [Patent Document 3]. 0009] and [0040]).
- brazing method for example, in the case of brazing in a furnace or torch brazing, when a member made of a material having high thermal conductivity such as aluminum is brazed, the member is heated to a high temperature over a wide range. Therefore, there is a problem that the joint strength is lowered and the productivity is lowered. Further, in the laser brazing method, it is necessary to accurately feed the wire-shaped brazing material to a narrow melting range, and the brazing material lowers the temperature of the molten pool, so that there is a problem that the brazing speed becomes slow. Therefore, there were many problems in terms of production technology.
- the present inventors have conducted diligent studies in view of such conventional problems. As a result, when joining metal members, if a sheet-like brazing material is placed between the plates and then laser welding is performed so that a predetermined structure can be obtained, it has excellent joining strength, as well as airtightness and watertightness. It was found that an excellent joining member can be obtained.
- the present invention has been completed based on such findings, and an object of the present invention is to provide a joining member having high joining strength and excellent airtightness and watertightness, and a method for manufacturing the same.
- the present invention includes the following aspects (1) to (8).
- the expression "-" includes the numerical values at both ends thereof. That is, "X to Y” is synonymous with “X or more and Y or less”.
- a first metal member having a first main surface and a second main surface, and at least a part of the first metal member arranged on the second main surface side of the first metal member and via a laser welded portion.
- a joining member comprising a second metal member joined to the The joining member includes a sheet-shaped brazing material on the second main surface side of the first metal member.
- the laser welded portion will be composed of a base metal melt portion composed of a first metal member, a second metal member, and a melt-integrated material of the sheet-shaped brazing material, and a melt of the sheet-shaped brazing material.
- the base metal melting portion penetrates from the first main surface to the second main surface of the first metal member and is continuously formed up to at least a part of the thickness of the second metal member.
- a joining member in which the brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion.
- a step of preparing a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material A step of producing a laminated body in which the sheet-shaped brazing material and the second metal member are arranged in this order on the second main surface side of the prepared first metal member, and a first metal member constituting the laminated body.
- the first main surface thereof is irradiated with a laser beam, and the second metal member is laser-welded to at least a part of the first metal member through the bonding interface.
- the first metal member, the second metal member, and a part of the sheet-shaped brazing material are melt-integrated to form a base metal melting portion penetrating the joining interface of the laser welding portion.
- a method of melting a sheet-shaped brazing material around the bonding interface to form a brazing material melting portion is used.
- a joining member having excellent joining strength and excellent airtightness and watertightness, and a method for manufacturing the same.
- FIG. It is a figure which shows the layer structure of the laminated body in Example 1.
- FIG. It is a drawing which shows the mode of laser welding in Example 1.
- FIG. It is a figure which shows the layer structure of the laminated body in Example 2.
- FIG. It is a drawing which shows the mode of laser welding in Example 3.
- FIG. It is an optical microscope image of the cross section of the joining member in Example 1.
- the present embodiment A specific embodiment of the present invention (hereinafter referred to as "the present embodiment") will be described.
- the present invention is not limited to the following embodiments, and various modifications can be made without changing the gist of the present invention.
- the joining member of the present embodiment is arranged on the second main surface side of the first metal member having the first main surface and the second main surface, and the first metal member via the laser welded portion.
- a second metal member joined to at least a part of the metal member is provided.
- the joining member includes a sheet-shaped brazing material on the second main surface side of the first metal member.
- the laser welded portion includes a base metal melting portion composed of a first metal member, a second metal member, and a molten material of a sheet-shaped brazing material, and a brazing material melting portion composed of a molten material of a sheet-shaped brazing material.
- the base metal melting portion penetrates from the first main surface to the second main surface of the first metal member, and is continuously formed up to at least a part of the thickness of the second metal member.
- the brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion.
- the joining member of the present embodiment is arranged on the second main surface side of the first metal member having the first main surface and the second main surface, and the first metal member via the laser welded portion.
- the shapes of the first metal member and the second metal member are not limited as long as they can form a joining member. It may be a plate material, an extruded material, or a bar material, or may have another shape.
- the materials of the first metal member and the second metal member are not limited as long as they can be laser welded.
- aluminum (Al), iron (Fe), copper (Cu), titanium (Ti), nickel (Ni), or alloys containing these metals are exemplified.
- the combination of the materials of the first metal member and the second metal member is not limited.
- the first metal member and the second metal member may be made of the same kind of material, or may be made of different materials.
- the first metal member and the second metal member are made of an aluminum-based metal.
- the aluminum-based metal is pure aluminum or an aluminum alloy.
- Examples of pure aluminum include 1000 series.
- As aluminum alloys 2000 series (Al-Cu series) alloys, 3000 series (Al-Mn series) alloys, 4000 series (Al-Si series) alloys, 5000 series (Al-Mg series) alloys, and 6000 series (Al-) series. Examples thereof include Mg—Si based alloys and 7000 based (Al—Zn—Mg based) alloys.
- the first metal member is made of a 1000 series or 3000 series alloy.
- the joining member of the present embodiment includes a sheet-shaped brazing material on the second main surface side of the first metal member. That is, the sheet-shaped brazing material is arranged on the second main surface side of the first metal member, in the gap with the second metal member, or around the second metal member.
- the sheet-shaped brazing filler metal is a component that assists in joining the first metal member and the second metal member during laser welding, and its melting point is lower than the melting points of the first metal member and the second metal member.
- This brazing filler metal forms a base metal melting portion together with the first metal member and the second metal member, and spreads around the bonding interface to form the brazing filler metal melting portion.
- the form of the brazing material is not limited as long as it is in the form of a sheet.
- it may be a clad material joined to the second main surface of the first metal member.
- it may be a clad material joined to the main surface of the second metal member.
- the clad material is a member obtained by clad rolling (crimping) a core material and a brazing material in a hot rolling process, and is also called a brazing sheet.
- the first metal member and / or the second metal member corresponds to the core material.
- the clad material may be a single-sided clad having a brazing material on one side of the core material, or a double-sided clad having a brazing material on both sides.
- the brazing material is not limited to the clad material.
- it may be a coating film formed on at least one main surface of the first metal member and / or the second metal member.
- the film-forming brazing material (16) may be formed by a known thick film or thin film forming method such as plating, sputtering, vapor deposition, or chemical vapor deposition. Further, the brazing material may be a self-standing sheet separate from the metal member, for example, a foil.
- the thickness of the brazing material is not limited. However, if the brazing filler metal is excessively thin, the amount of brazing filler metal required for laser welding is reduced, which may lead to poor joining.
- the thickness of the brazing filler metal is preferably 5 ⁇ m or more.
- the material of the brazing material depends on the material of the first metal member and the second metal member, it cannot be unconditionally determined.
- the first metal member and the second metal member is made of an aluminum-based metal
- 4000-based (Al—Si-based) alloys, Al—Cu—Si-based, Al—Zn-based, and the like can be mentioned.
- a 4000 series alloy is suitable.
- the 4000 series alloy has high fluidity. The highly fluid alloy spreads thinly in the gap between the first metal member and the second metal member during laser welding to form a brazing filler metal melted portion. Therefore, the effect of improving the airtightness and the watertightness is excellent, and the stress relaxation effect of the joint can be expected.
- the laser welded portion corresponds to a portion where at least a part of the first metal member and at least a part of the second metal member are joined.
- the laser welded portion is composed of a base metal molten portion and a brazing filler metal fused portion.
- each of the base metal melting portion and the brazing filler metal melting portion is also referred to as a weld bead and a fillet.
- the base metal melting portion is composed of a first metal member, a second metal member, and a molten and integrated product of a sheet-shaped brazing material. That is, during laser welding, heat is generated on the first main surface irradiated with the laser beam of the first metal member, and this heat is transferred to the brazing material and the second metal member. In the vicinity of the region irradiated with the laser beam, the first metal member, the brazing material and the second metal member reach high temperatures, and as a result, melt to form a molten metal. Inside the molten metal, the components diffuse and mix due to heat convection.
- the base metal melting portion is a solidified product containing components derived from the first metal member, the second metal member, and the brazing material.
- Each component in the base metal melted portion may be uniformly distributed or may be unevenly distributed.
- the base metal melting portion may contain a large amount of a component derived from the first metal member or may contain a large amount of a component derived from the second metal member depending on the location.
- the joint portion may contain a large amount of components derived from the brazing material.
- the base metal melting portion penetrates from the first main surface to the second main surface of the first metal member, and is continuously formed up to at least a part of the thickness of the second metal member. That is, the base metal melting portion exists in the region near the laser welded portion over the entire thickness direction of the first metal member, and further exists over a part or the entire thickness direction of the second metal member. It can also be said that the base metal melting portion is formed so as to straddle the first metal member and the second metal member and penetrate the interface between the two. In this way, the laser joint is composed of the base metal melt, which is a melt-integrated product, and is further formed so as to penetrate the interface between the first metal member and the second metal member, thereby increasing the strength at the joint. It will be possible to make it excellent. In this respect, it can be said that the base metal melting portion functions as the main joint portion.
- the shape of the base metal melting part is not particularly limited.
- the cross section decreases from the upper surface (first main surface) of the first metal member toward the lower surface of the second metal member.
- a rotating body in which a triangle is rotated around the central axis
- a rotating body in which a trapezoid is rotated around the central axis
- a rotating body parous line rotating body in which a parabolic wire is rotated.
- the shape is not limited as long as it is a shape formed by laser welding.
- the brazing filler metal melt portion is composed of a sheet-shaped brazing filler metal melt.
- the first metal member and the second metal member do not reach a high temperature enough to be melted around the molten metal which becomes the base metal melting portion.
- the brazing filler metal has a low melting point and therefore melts.
- the melted brazing filler metal cools and solidifies to form a brazing filler metal melted portion. Therefore, the brazing filler metal melted portion is a solidified product mainly containing components derived from the brazing filler metal. Even if a component derived from the first metal member or the second metal member is contained, the amount thereof is small.
- the brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion.
- the brazing filler metal is melted by heat transfer from the first metal member, the second metal member, and the base metal melting portion, and the brazing filler metal melting portion is formed.
- the brazing filler metal melted portion is formed so as to be tightly bonded to the first metal member, the second metal member, and the base metal melted portion.
- the joining strength of the joining member can be further improved. That is, the brazing filler metal melted portion is tightly joined to the first metal member and the second metal member around the base metal melted portion. The width of the joint is substantially widened, and the joint strength is increased. In this respect, it can be said that the brazing filler metal melted portion functions as an auxiliary joint portion.
- FIG. 1A is a cross-sectional view of a joining member having no brazing material and a brazing material melting portion
- FIG. 1B is a cross-sectional view of a joining member provided with a brazing material and a brazing material melting portion. ..
- FIG. 1 (a) When there is no brazing filler metal melted portion (FIG. 1 (a)), the first metal member (12) and the second metal member (14) are joined via only the base metal melted portion (22). In this case, air or moisture infiltrates through the gaps between the metal members (12, 14).
- solidification cracks (26) may occur in the base metal melting portion (22) which is the laser welded portion.
- Solidification cracks (26) are a type of cracks. When a solidification crack (26) occurs in the base metal melting portion (22), air or moisture penetrates into the upper part of the metal member (12) through the solidification crack (26). Therefore, the airtightness and watertightness of the joint cannot be ensured.
- the brazing filler metal melted portion FIG. 1 (b)
- the periphery of the base metal melted portion (22) is sealed by the brazing filler metal (16) and the molten metal melted portion (24). ing. Therefore, even if solidification cracking (26) occurs, airtightness and watertightness are surely ensured.
- the type of joining of the first metal member and the second metal member is not limited as long as both are joined via the laser joining portion.
- Known types of joints include lap joints, T joints, cross joints, square joints, scarf joints, helicopter joints, shaving joints, flare joints, backing plate joints, and lap fillet joints. May be good.
- FIGS. 2 (a) and 2 (b) A schematic cross-sectional view of a joining member provided with a lap joint is shown in FIGS. 2 (a) and 2 (b).
- FIG. 2A is an overall view of the joint member
- FIG. 2B is an enlarged view showing the vicinity of the joint portion.
- the first metal member (12) and the second metal member (14) form a lap joint. That is, a part of the second main surface of the first metal member (12) and a part of the main surface of the second metal member (14) are laser-bonded via the joint portion (20).
- a sheet-shaped brazing material (16) is arranged on the second main surface of the first metal member (12), that is, between the first metal member (12) and the second metal member (14). ..
- a base metal melting portion (22) and a brazing filler metal melting portion (24) existing around the base metal melting portion (22) are formed in the joint portion (20).
- FIG. 3A is an overall view of the joint member
- FIG. 3B is an enlarged view showing the vicinity of the joint portion.
- the first metal member (12) and the second metal member (14) form a T joint and are joined. That is, a part of the second main surface of the first metal member (12) and the end surface of the second metal member (14) are laser-bonded via the joint portion (20).
- a sheet-shaped brazing material (16) is arranged on the second main surface of the first metal member.
- a base metal melting portion (22) and a brazing filler metal melting portion (24) existing around the base metal melting portion (22) are formed in the joint portion (20).
- the method of manufacturing a joining member of the present embodiment is as follows: a step of preparing a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material. (Preparation step), a step of producing a laminate in which a sheet-shaped brazing material and a second metal member are arranged in this order on the second main surface side of the prepared first metal member (lamination step), and a laminate.
- a step of irradiating a first main surface of the first metal member to be laser-welded to at least a part of the first metal member via a bonding interface (laser welding step) is provided.
- a part of the first metal member, the second metal member and the sheet-shaped brazing material are melted and integrated to form a base metal melting portion penetrating the joining interface of the laser welding portion, and the above-mentioned
- the sheet-like brazing material around the bonding interface is melted to form a brazing material melting portion. Details of each step will be described below.
- a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material are prepared.
- the first metal member, the second metal member, and the sheet-shaped brazing material are as described above.
- a clad material obtained by rolling and joining them can be used, and in that case, the first metal member and the sheet-shaped brazing material can be prepared as an integrated product.
- a clad material obtained by rolling and joining them can be used as an integrated product.
- the second metal member and the sheet-shaped brazing material a clad material obtained by rolling and joining them can be used. In that case, the second metal member and the sheet-shaped brazing material can be prepared as an integrated product.
- a foil-shaped brazing material that is a self-supporting sheet can be used, and in that case, a first metal member, a second metal member, and a sheet-shaped brazing material may be prepared separately.
- a laminated body is produced in which the sheet-shaped brazing material and the second metal member are arranged in this order on the second main surface side of the prepared first metal member.
- a flux is arranged together with the sheet-shaped brazing material between the first metal member and the second metal member.
- Flux is a component that promotes bonding between a metal member and a brazing material.
- a natural oxide film may be formed on the surface of the metal member. Such an oxide film may hinder metal contact between the metal member and the brazing material and cause poor bonding.
- a flux having a melting point lower than that of the brazing material is used, this flux wets the surface of the metal member during welding and destroys the surface oxide film. Therefore, poor joining can be suppressed.
- the flux is not limited as long as it has a lower melting point than the brazing material and can destroy the surface oxide film of the metal member.
- a flux include a non-corrosive fluoride-based flux and a corrosive chloride flux, and a non-corrosive flux is suitable.
- the non-corrosive flux does not corrode metal parts or brazing materials. In addition, it is not necessary to clean the joined member after welding to remove the flux, which leads to a reduction in manufacturing cost.
- the non-corrosive flux include NOCOLOK (registered trademark).
- the procedure for producing the laminated body is not particularly limited.
- a clad material obtained by rolling and joining a first metal member and a sheet-shaped brazing material a flux may be applied to the surface of the brazing material of the clad material, and the second metal member may be placed on the flux.
- a clad material obtained by rolling and joining a second metal member and a sheet-shaped brazing material a flux may be applied to the surface of the brazing material of the clad material, and the first metal member may be placed on the flux.
- a foil-like brazing material as a self-supporting sheet is used, the first metal member, the brazing material, and the second metal material may be placed in this order after applying flux to the surface of the brazing material.
- a flux may be applied to the main surfaces of the first metal member and the second metal material, and a foil-like brazing material may be placed between the applied fluxes.
- a means of forming a film-like brazing material on the surface of the first metal member by using a known thin film forming method, applying a flux to the surface of the film-like brazing material, and then placing the second metal member on the surface is also conceivable. ..
- the first main surface of the first metal member constituting the laminated body is irradiated with laser light, and the second metal member is laser welded to at least a part of the first metal member via the bonding interface.
- a part of the first metal member, the second metal member, and the sheet-shaped brazing material are melt-integrated to form a base metal melting portion penetrating the joining interface of the laser welded portion, and the periphery of the joining interface.
- the sheet-shaped brazing filler metal is melted to form a brazing filler metal melted portion.
- the first main surface (upper surface in the drawing) of the first metal member (12) constituting the laminated body is irradiated with the laser beam (28) to cover at least a part of the first metal member (12).
- the second metal member (14) is laser welded.
- the laser beam (28) moves in the direction indicated by the arrow in the figure.
- a part of the first metal member (12), the second metal member (14), and the sheet-shaped brazing material (16) are melt-integrated to form a base metal melting portion (22), and the surroundings thereof are formed.
- the sheet-shaped brazing material (16) is melted to form a brazing material melting portion (24).
- the main surface of a metal member When the main surface of a metal member is irradiated with laser light, a part of the laser energy is absorbed by the plate material, and the surface is rapidly heated. The generated heat is transferred to the inside of the plate by conduction.
- the surface of the plate material is instantly melted and vaporized to form a molten pool, and components with high vapor pressure are ejected as evaporation to form dents on the surface of the molten pool.
- the laser beam radiated to the depression is absorbed by the molten pool, and repeatedly melts, vaporizes, and ejects evaporation to form a deep hole (key hole) in the center of the molten pool. The keyhole moves with the movement of the laser beam.
- the molten pool is rapidly cooled and solidified. A molten pool that has been cooled and solidified is called a weld or a weld bead.
- the depth of the molten part is called the melting depth.
- the penetration depth can be made larger than the thickness of the first metal member.
- the molten pool penetrates the first metal member and the brazing material and reaches the inside of the second metal member. That is, a part of the first metal member, the second metal member, and the brazing material can be melted, and as a result, the first metal member and the second metal member can be overlapped and welded.
- the molten metal in the molten pool is convected, and this convection mixes the metal members constituting the molten metal with the components of the brazing material.
- a base metal molten portion containing each component of the metal member and the brazing filler metal is formed. Since the base metal melting portion is formed straddling the first metal member and the second metal member, a joint portion is formed at the interface between the first metal member and the second metal member. The interface on which this joint is formed is the joint interface.
- brazing filler metal with a low melting point melts. That is, heat is transferred to the brazing material and the flux by using the molten portion formed by laser welding as a heat bridge, and the brazing material and the flux are melted and wetted and spread to be brazed.
- the brazing material wets and spreads so as to fill the gap between the first metal member and the second metal member.
- the wet and spread brazing filler metal is cooled to form a brazing filler metal melted portion.
- the regions of the base metal melting part and the brazing material melting part can be investigated by observing the structure and analyzing the composition in the cross section of the joined member.
- the composition of the base metal melting portion is different from that of the first metal member, the second metal member, and the brazing material.
- the regions of the base metal melting portion and the brazing filler metal melting portion can be determined.
- the conditions of laser welding are not particularly limited as long as the joining member of the present embodiment can be manufactured.
- a known laser such as a CO 2 laser, a YAG laser, a semiconductor laser, an LD-pumped solid-state laser, or a fiber laser can be used.
- the laser oscillation may be continuous oscillation or pulse oscillation.
- conditions such as laser output, focal length, and welding speed are not limited as long as the joining member of the present embodiment can be obtained.
- the optimum conditions for laser welding depend on the material and thickness of the metal member and brazing material, so this cannot be unequivocally determined.
- the welding speed may be set to 0.5 to 5 m / min, but the welding speed is not limited to this.
- a cleaning step may be provided to clean the joined member that has undergone laser welding.
- a corrosive flux it is desirable to perform a cleaning treatment to remove the residual flux.
- the cleaning treatment may not be performed.
- the joining member of the present embodiment can be obtained. Since the joint member after production includes both a base metal melting portion and a brazing filler metal melting portion, the strength at the joining portion is excellent. In addition, airtightness and watertightness at the joint are ensured.
- FIGS. 5 to 19 An example of a joint member forming a cross joint, a square joint, a scarf joint, a helicopter joint, a shaving joint, a flare joint, a backing plate joint, and a lap fillet joint, and laser irradiation when manufacturing these joint members.
- the direction of laser incident in the method of performing the above is shown in FIGS. 5 to 19.
- Example 1 a clad material to which the first metal member and the brazing material were joined and a clad material to which the second metal member and the brazing material were joined were laser-welded to prepare a joined member.
- the joining member was manufactured by the following procedure.
- a plate-shaped clad material in which A3003 material (Al—Mn-based alloy) and A4343 material (Al—Si-based alloy) were joined by hot rolling was prepared.
- the total thickness of this clad material was 1.6 mm, and the thickness of the A4343 material was about 7% of the total thickness.
- the same clad material as the upper material was prepared.
- the upper material (clad material) A3003 material corresponds to the first metal member, and the A4343 material corresponds to the brazing material.
- the lower material (clad material) A3003 material corresponds to the second metal member, and the A4343 material corresponds to the brazing material.
- ⁇ Laminating process> The upper material and the lower material were laminated via a flux as shown in FIG. Specifically, NOCOLOK flux was applied to the surface of the brazing material of the upper material. Next, the upper material and the lower material were laminated so that the surface of the upper material coated with the flux and the surface of the brazing material of the lower material faced each other. From the top to the bottom, the obtained laminated body has an upper material [A3003 (first metal member) / A4343 (wazing material)] / flux / lower material [A4343 (wazing material) / A3003 (second metal member)). ] Had a layered structure.
- the laminated body was irradiated with a laser to join the upper material and the lower material.
- the laser beam was irradiated while scanning the substantially central portion of the surface of the upper material constituting the laminated body. Irradiation was performed under the condition of a laser output of 2.0 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
- Example 2 In Example 2, the clad material to which the first metal member and the brazing material were bonded and the second metal member were laser welded to prepare a bonded member.
- the joining member was manufactured by the following procedure.
- a plate-shaped clad material in which A3003 material and A4343 material were joined by hot rolling was prepared.
- the total thickness of this clad material was 2.0 mm, and the thickness of the A4343 material was about 7% of the total thickness.
- A6063 extruded material was prepared as a lower material.
- the upper material (clad material) A3003 material corresponds to the first metal member, and the A4343 material corresponds to the brazing material. Further, the lower material (A6063 extruded material) corresponds to the second metal member.
- the upper material and the lower material were laminated via a flux as shown in FIG. Specifically, NOCOLOK flux was applied to the surface of the brazing material of the upper material.
- the upper material and the lower material were laminated so that the surface of the upper material coated with the flux and the surface of the lower material face each other.
- the obtained laminate has a layer structure of upper material [A3003 (first metal member) / A4343 (wax material)] / flux / lower material [A6003 (second metal member)] from top to bottom.
- the laminated body was irradiated with a laser as shown in FIG. 23 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.6 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
- Example 3 In Example 3, the first metal member and the second metal member were laser-welded via a foil-like brazing material.
- the joining member was manufactured by the following procedure.
- An A3003 plate (thickness 2.0 mm) was prepared as the upper material, and an A6063 extruded material (thickness 2.0 mm) was prepared as the lower material.
- the A3003 plate material (upper material) corresponds to the first metal member, and the A6063 extruded material (lower material) corresponds to the second metal member.
- an A4045 foil material (thickness 0.06 mm) was prepared as a brazing material.
- the upper material and the lower material were laminated via a brazing material and a flux.
- NOCOLOK flux was applied to the respective surfaces of the upper material and the brazing material.
- the upper material and the brazing material are laminated so that the surface of the upper material coated with the flux and the surface of the brazing material not coated with the flux face each other, and further, the surface of the brazing material coated with the flux and the surface of the lower material face each other.
- a flux material and a lower material were laminated on the surface.
- the obtained laminated body has an upper material [A3003 plate material (first metal member)] / flux / A4045 foil material (wax material) / flux / lower material [A6063 extruded material (second metal member). )] Had a layered structure.
- the laminated body was irradiated with a laser as shown in FIG. 25 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.4 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
- Example 4 (comparison)
- the first metal member and the second metal member were laser welded without using any brazing material or flux.
- the joining member was manufactured by the following procedure.
- A3003 plate (thickness 2.0 mm) was prepared as the upper material, and an A6063 extruded material (thickness 2.0 mm) was prepared as the lower material.
- the A3003 plate material (upper material) corresponds to the first metal member, and the A6063 extruded material (lower material) corresponds to the second metal member.
- the upper material and the lower material were laminated as shown in FIG. 26.
- the obtained laminate had a layer structure of an upper material [A3003 plate material (first metal member)] / lower material [A6063 extruded material (second metal member)] from top to bottom.
- the laminated body was irradiated with a laser as shown in FIG. 27 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.2 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
- Tables 1 and 2 show the members used for manufacturing the joining members and the chemical components of the aluminum alloy.
- FIGS. 28 and 29 Optical microscope images of the cross section of the joining member of Example 1 are shown in FIGS. 28 and 29.
- FIG. 28 shows the entire joint member
- FIG. 29 shows the vicinity of the joint portion.
- the optical microscope image of the cross section of the joining member of Example 2 is shown in FIGS. 30 and 31
- the optical microscope image of the cross section of the joining member of Example 3 is shown in FIGS. 32 and 33
- the optics of the cross section of the joining member of Example 4 is shown.
- Microscopic images are shown in FIGS. 34 and 35.
- Example 1 As shown in FIGS. 28 and 29, in the joint member of Example 1, a base metal melted portion in which a core material (A3003 material) and a skin material (A4343 material) were melted and solidified was formed at the joint portion. This base metal melting portion was firmly joined so as to integrate the core material of the upper plate and the lower plate. Further, a brazing material melting portion in which the skin material (A4343) was melted and solidified was formed around the base metal melting portion. This brazing filler metal melted portion sealed the base metal melted portion. The same results as in Example 1 were obtained for the joining members of Examples 2 and 3, and the base metal melting portion and the brazing filler metal melting portion that seals the periphery thereof were formed in the joining portion.
- Joining member 12 1st metal member 14 2nd metal member 16 Sheet-shaped brazing material 18 Joining interface 20 Laser welding part 22 Base metal melting part 24 Brazing material melting part 26 Solidification crack 28 Laser light
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
Provided are: a bonded member (10) which has superior bonding strength and excellent airtightness and watertightness; and a method for manufacturing the same. The bonded member (10) comprises: a first metal member (12) having a first primary surface and a second primary surface; and a second metal member (14) that is disposed on the second primary surface side of the first metal member (12), and that is bonded to at least part of the first metal member (12) via a laser welded section (20). The bonded member (10) is provided with a sheet-shaped brazing material (16) on the second primary surface side of the first metal member (12). The laser welded section (20) includes: a base molten portion (22) that is constituted by a molten integrated body of the first metal member (12), the second metal member (14), and the sheet-shaped brazing material (16); and a brazing material molten portion (24) constituted by a molten body of the sheet-shaped brazing material (16). The base molten portion (22) penetrates from the first primary surface to the second primary surface of the first metal member (12), and is formed continuously to at least a certain degree of the thickness of the second metal member (14). The brazing material molten portion (24) is closely adhered to the first metal member (12), the second metal member (14), and the base molten portion (22).
Description
本発明は、接合部材及びその製造方法に関する。
The present invention relates to a joining member and a method for manufacturing the same.
自動車、鉄道、航空機などの輸送機器をはじめとして、医療機器、電子部品、化学プラントなどの様々な分野において、複数の金属部材を接合して大型構造部品を製造することが広く行われている。金属部材を接合する手法として、溶接、圧接、ろう付け、及び機械的接合法が知られている。
In various fields such as medical equipment, electronic parts, chemical plants, etc., including transportation equipment such as automobiles, railways, and aircraft, it is widely practiced to join multiple metal parts to manufacture large structural parts. Welding, pressure welding, brazing, and mechanical joining methods are known as methods for joining metal members.
このうち、ろう付けは、被接合部材(母材)より融点の低い合金からなる、ろう材を溶かし、これを接着剤として用いて、被接合部材自体を溶融させずに接合する手法である。ろう材を溶融するには、炉中ろう付けやトーチろう付けなどの手法が利用される。炉中ろう付けは、部品を炉中に入れて全体を加熱して、ろう付けを行う手法であり、トーチろう付け法は、ガストーチを用いて部品を局所的に加熱して、ろう付けする手法である。
Of these, brazing is a method of melting a brazing material made of an alloy having a melting point lower than that of the material to be joined (base material) and using this as an adhesive to join the member to be joined without melting it. Techniques such as in-fire brazing and torch brazing are used to melt the brazing material. Brazing in a furnace is a method of putting parts in a furnace and heating the whole to perform brazing, and torch brazing method is a method of locally heating parts using a gas torch and brazing. Is.
近年、ろう付け法において、レーザ光を用いてろう付けを行うレーザブレージングが提案されている。レーザブレージングでは、被接合部材の接合部位にレーザ光を照射及び加熱し、それにより、ろう材を溶融させて部材同士を接合する。例えば、特許文献1には、フラックスとろう材を用いて、複数の金属部材をレーザーブレ―ジングにより、ろう付けするろう付け工程と、ろう付け部の表面に残留しているフラックスを除去する高周波レーザーパルス照射工程と、ろう付け部を含めて化成処理を行う化成処理工程と、を有する金属接合部材の製造方法が開示されている(特許文献1の請求項1)。
In recent years, in the brazing method, laser brazing that performs brazing using laser light has been proposed. In laser brazing, the joining portion of the member to be joined is irradiated with laser light and heated, whereby the brazing material is melted and the members are joined to each other. For example, Patent Document 1 describes a brazing step of brazing a plurality of metal members by laser brazing using a flux and a brazing material, and a high frequency of removing the flux remaining on the surface of the brazed portion. A method for manufacturing a metal bonding member having a laser pulse irradiation step and a chemical conversion treatment step of performing a chemical conversion treatment including a brazed portion is disclosed (claim 1 of Patent Document 1).
また、溶接法においては、レーザ光を利用するレーザ溶接が知られている。レーザ溶接は、被接合部材の接合部位に高エネルギーレーザ光を照射して部材を溶融接合する手法であり、被接合部材自体を溶融させる点でろう付けとは異なる。レーザ溶接は、高速溶接が可能、熱変形が少ないといった特徴があり、例えば、アルミニウム合金部材を接合して自動車部材や電池ケースを製造する際に利用されている。
Further, in the welding method, laser welding using laser light is known. Laser welding is a method of irradiating a joint portion of a member to be joined with high-energy laser light to melt-join the member, and is different from brazing in that the member to be joined itself is melted. Laser welding is characterized by being capable of high-speed welding and having little thermal deformation, and is used, for example, when joining aluminum alloy members to manufacture automobile members and battery cases.
特許文献2には、アルミニウム系被溶接材と、表面に亜鉛系被覆層を有する鉄系被溶接材とを異材接合する方法に関して、ろう材を使用せずにレーザ溶接することが記載されている(特許文献2の請求項1及び[0013])。また特許文献3には、Fe、Mn、Ti及びZrを含有する電池ケース用アルミニウム合金板に関して、パルスレーザ照射を行ってレーザ溶接することが記載されている(特許文献3の請求項1、[0009]及び[0040])。
Patent Document 2 describes a method of joining an aluminum-based welded material and an iron-based welded material having a zinc-based coating layer on the surface to different materials by laser welding without using a brazing material. (Claim 1 and [0013] of Patent Document 2). Further, Patent Document 3 describes that an aluminum alloy plate for a battery case containing Fe, Mn, Ti and Zr is laser-welded by irradiating it with a pulsed laser (claim 1, [Patent Document 3]. 0009] and [0040]).
このように、従来からろう付け法やレーザ溶接法などの手法で金属部材を接合する方法が利用されるものの、課題があった。ろう付け法においては、例えば炉中ろう付けやトーチろう付けでは、アルミニウムのような熱伝導率の高い材料からなる部材をろう付けする場合には、部材が広範囲にわたって高温加熱されてしまう。そのため継手強度が低下するとともに生産性が低下する問題があった。またレーザブレージング法では、狭い溶融範囲に正確にワイヤ状のろう材を送給する必要があるとともに、ろう材によって溶融池の温度が低下するため、ろう付け速度が遅くなる問題があった。そのため生産技術的に課題が多かった。
In this way, although conventional methods such as brazing and laser welding have been used to join metal members, there have been problems. In the brazing method, for example, in the case of brazing in a furnace or torch brazing, when a member made of a material having high thermal conductivity such as aluminum is brazed, the member is heated to a high temperature over a wide range. Therefore, there is a problem that the joint strength is lowered and the productivity is lowered. Further, in the laser brazing method, it is necessary to accurately feed the wire-shaped brazing material to a narrow melting range, and the brazing material lowers the temperature of the molten pool, so that there is a problem that the brazing speed becomes slow. Therefore, there were many problems in terms of production technology.
さらに、レーザ溶接法では、溶接部(接合部)に欠陥が生じて接合特性が劣化する問題があった。すなわちレーザ溶接では、被接合部材の材質によっては、溶接部に凝固割れやポロシティといった欠陥が生じることがある。凝固割れは粒界に沿って生じる亀裂であり、これが生じると、接合部の機械的特性が著しく低下する。また亀裂に沿って空気や水分が内部に浸入するため、気密性及び水密性が著しく劣化することがある。
Further, in the laser welding method, there is a problem that a defect occurs in the welded portion (joint portion) and the joining characteristics deteriorate. That is, in laser welding, defects such as solidification cracks and porosity may occur in the welded portion depending on the material of the member to be joined. Solidification cracks are cracks that occur along the grain boundaries, which significantly reduce the mechanical properties of the joint. In addition, since air and moisture infiltrate the inside along the cracks, the airtightness and watertightness may be significantly deteriorated.
本発明者らは、このような従来の問題点に鑑みて鋭意検討を行った。その結果、金属部材を接合するに際し、板材間にシート状ろう材を配した上で、所定の組織が得られるようにレーザ溶接を行うと、優れた接合強度を有するとともに、気密性及び水密性に優れた接合部材を得ることができるという知見を得た。
The present inventors have conducted diligent studies in view of such conventional problems. As a result, when joining metal members, if a sheet-like brazing material is placed between the plates and then laser welding is performed so that a predetermined structure can be obtained, it has excellent joining strength, as well as airtightness and watertightness. It was found that an excellent joining member can be obtained.
本発明は、このような知見に基づき完成されたものであり、接合強度が高いとともに気密性及び水密性に優れた接合部材及びその製造方法の提供を目的とする。
The present invention has been completed based on such findings, and an object of the present invention is to provide a joining member having high joining strength and excellent airtightness and watertightness, and a method for manufacturing the same.
本発明は、下記(1)~(8)の態様を包含する。なお本明細書において「~」なる表現は、その両端の数値を含む。すなわち「X~Y」は「X以上Y以下」と同義である。
The present invention includes the following aspects (1) to (8). In the present specification, the expression "-" includes the numerical values at both ends thereof. That is, "X to Y" is synonymous with "X or more and Y or less".
(1)第1主面及び第2主面を有する第1金属部材と、前記第1金属部材の第2主面側に配置され、レーザ溶接部を介して前記第1金属部材の少なくとも一部と接合した第2金属部材と、を備える接合部材であって、
前記接合部材が、前記第1金属部材の第2主面側にシート状ろう材を備え、
前記レーザ溶接部が、前記第1金属部材、前記第2金属部材及び前記シート状ろう材の溶融一体化物で構成される母材溶融部と、前記シート状ろう材の溶融物で構成されるろう材溶融部と、を備え、
前記母材溶融部が、前記第1金属部材の第1主面から第2主面へと貫通し、かつ第2金属部材の厚さの少なくとも一部にまで連続して形成されており、
前記ろう材溶融部が、前記第1金属部材、前記第2金属部材及び前記母材溶融部と密着している、接合部材。 (1) A first metal member having a first main surface and a second main surface, and at least a part of the first metal member arranged on the second main surface side of the first metal member and via a laser welded portion. A joining member comprising a second metal member joined to the
The joining member includes a sheet-shaped brazing material on the second main surface side of the first metal member.
The laser welded portion will be composed of a base metal melt portion composed of a first metal member, a second metal member, and a melt-integrated material of the sheet-shaped brazing material, and a melt of the sheet-shaped brazing material. With a material melting part,
The base metal melting portion penetrates from the first main surface to the second main surface of the first metal member and is continuously formed up to at least a part of the thickness of the second metal member.
A joining member in which the brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion.
前記接合部材が、前記第1金属部材の第2主面側にシート状ろう材を備え、
前記レーザ溶接部が、前記第1金属部材、前記第2金属部材及び前記シート状ろう材の溶融一体化物で構成される母材溶融部と、前記シート状ろう材の溶融物で構成されるろう材溶融部と、を備え、
前記母材溶融部が、前記第1金属部材の第1主面から第2主面へと貫通し、かつ第2金属部材の厚さの少なくとも一部にまで連続して形成されており、
前記ろう材溶融部が、前記第1金属部材、前記第2金属部材及び前記母材溶融部と密着している、接合部材。 (1) A first metal member having a first main surface and a second main surface, and at least a part of the first metal member arranged on the second main surface side of the first metal member and via a laser welded portion. A joining member comprising a second metal member joined to the
The joining member includes a sheet-shaped brazing material on the second main surface side of the first metal member.
The laser welded portion will be composed of a base metal melt portion composed of a first metal member, a second metal member, and a melt-integrated material of the sheet-shaped brazing material, and a melt of the sheet-shaped brazing material. With a material melting part,
The base metal melting portion penetrates from the first main surface to the second main surface of the first metal member and is continuously formed up to at least a part of the thickness of the second metal member.
A joining member in which the brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion.
(2)前記第1金属部材と前記第2金属部材とが重ね継手を形成して接合されている、上記(1)の接合部材。
(2) The joining member according to (1) above, wherein the first metal member and the second metal member are joined by forming a lap joint.
(3)前記第1金属部材と前記第2金属部材とがT継手を形成して接合されている、上記(1)の接合部材。
(3) The joining member according to (1) above, wherein the first metal member and the second metal member are joined by forming a T joint.
(4)前記第1金属部材と前記第2金属部材とが同種材料からなる、上記(1)~(3)のいずれかの接合部材。
(4) The joining member according to any one of (1) to (3) above, wherein the first metal member and the second metal member are made of the same material.
(5)前記第1金属部材と前記第2金属部材とが異種材料からなる、上記(1)~(3)のいずれかの接合部材。
(5) The joining member according to any one of (1) to (3) above, wherein the first metal member and the second metal member are made of different materials.
(6)前記第1金属部材及び前記第2金属部材の一方又は両方がアルミニウム系金属からなる、上記(1)~(5)のいずれかの接合部材。
(6) The joining member according to any one of (1) to (5) above, wherein one or both of the first metal member and the second metal member are made of an aluminum-based metal.
(7)上記(1)~(6)のいずれかの接合部材の製造方法であって、以下の工程;
第1主面及び第2主面を有する第1金属部材、第2金属部材、及びシート状ろう材を準備する工程、
準備した前記第1金属部材の第2主面側に前記シート状ろう材及び前記第2金属部材がこの順に配置されてなる積層体を作製する工程、及び
前記積層体を構成する第1金属部材の第1主面にレーザ光を照射して、接合界面を介して前記第1金属部材の少なくとも一部に前記第2金属部材をレーザ溶接する工程、を備え、
前記レーザ溶接する工程で、前記第1金属部材、前記第2金属部材及び前記シート状ろう材の一部を溶融一体化させて、レーザ溶接部の接合界面を貫通する母材溶融部を形成するとともに、前記接合界面周囲のシート状ろう材を溶融させて、ろう材溶融部を形成する、方法。 (7) The method for manufacturing a joining member according to any one of (1) to (6) above, wherein the following steps;
A step of preparing a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material.
A step of producing a laminated body in which the sheet-shaped brazing material and the second metal member are arranged in this order on the second main surface side of the prepared first metal member, and a first metal member constituting the laminated body. The first main surface thereof is irradiated with a laser beam, and the second metal member is laser-welded to at least a part of the first metal member through the bonding interface.
In the laser welding step, the first metal member, the second metal member, and a part of the sheet-shaped brazing material are melt-integrated to form a base metal melting portion penetrating the joining interface of the laser welding portion. At the same time, a method of melting a sheet-shaped brazing material around the bonding interface to form a brazing material melting portion.
第1主面及び第2主面を有する第1金属部材、第2金属部材、及びシート状ろう材を準備する工程、
準備した前記第1金属部材の第2主面側に前記シート状ろう材及び前記第2金属部材がこの順に配置されてなる積層体を作製する工程、及び
前記積層体を構成する第1金属部材の第1主面にレーザ光を照射して、接合界面を介して前記第1金属部材の少なくとも一部に前記第2金属部材をレーザ溶接する工程、を備え、
前記レーザ溶接する工程で、前記第1金属部材、前記第2金属部材及び前記シート状ろう材の一部を溶融一体化させて、レーザ溶接部の接合界面を貫通する母材溶融部を形成するとともに、前記接合界面周囲のシート状ろう材を溶融させて、ろう材溶融部を形成する、方法。 (7) The method for manufacturing a joining member according to any one of (1) to (6) above, wherein the following steps;
A step of preparing a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material.
A step of producing a laminated body in which the sheet-shaped brazing material and the second metal member are arranged in this order on the second main surface side of the prepared first metal member, and a first metal member constituting the laminated body. The first main surface thereof is irradiated with a laser beam, and the second metal member is laser-welded to at least a part of the first metal member through the bonding interface.
In the laser welding step, the first metal member, the second metal member, and a part of the sheet-shaped brazing material are melt-integrated to form a base metal melting portion penetrating the joining interface of the laser welding portion. At the same time, a method of melting a sheet-shaped brazing material around the bonding interface to form a brazing material melting portion.
(8)前記第1金属部材及び前記シート状ろう材として、第1金属部材及びシート状ろう材が圧延接合されてなるクラッド材を準備する、上記(7)の方法。
(8) The method according to (7) above, wherein as the first metal member and the sheet-shaped brazing material, a clad material obtained by rolling and joining the first metal member and the sheet-shaped brazing material is prepared.
本発明によれば、優れた接合強度を有するとともに、気密性及び水密性に優れた接合部材及びその製造方法が提供される。
According to the present invention, there is provided a joining member having excellent joining strength and excellent airtightness and watertightness, and a method for manufacturing the same.
本発明の具体的な実施形態(以下、「本実施形態」という)について説明する。なお本発明は、以下の実施形態に限定されるものではなく、本発明の要旨を変更しない範囲において種々の変更が可能である。
A specific embodiment of the present invention (hereinafter referred to as "the present embodiment") will be described. The present invention is not limited to the following embodiments, and various modifications can be made without changing the gist of the present invention.
1.接合部材
本実施形態の接合部材は、第1主面及び第2主面を有する第1金属部材と、この第1金属部材の第2主面側に配置され、レーザ溶接部を介して第1金属部材の少なくとも一部と接合した第2金属部材と、を備える。また接合部材は、第1金属部材の第2主面側にシート状ろう材を備える。レーザ溶接部は、第1金属部材、第2金属部材及びシート状ろう材の溶融一体化物で構成される母材溶融部と、シート状ろう材の溶融物で構成されるろう材溶融部と、を備える。母材溶融部は、前記第1金属部材の第1主面から第2主面へと貫通し、かつ第2金属部材の厚さの少なくとも一部にまで連続して形成されている。ろう材溶融部は、第1金属部材、前記第2金属部材及び母材溶融部と密着している。 1. 1. Joining member The joining member of the present embodiment is arranged on the second main surface side of the first metal member having the first main surface and the second main surface, and the first metal member via the laser welded portion. A second metal member joined to at least a part of the metal member is provided. Further, the joining member includes a sheet-shaped brazing material on the second main surface side of the first metal member. The laser welded portion includes a base metal melting portion composed of a first metal member, a second metal member, and a molten material of a sheet-shaped brazing material, and a brazing material melting portion composed of a molten material of a sheet-shaped brazing material. To prepare for. The base metal melting portion penetrates from the first main surface to the second main surface of the first metal member, and is continuously formed up to at least a part of the thickness of the second metal member. The brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion.
本実施形態の接合部材は、第1主面及び第2主面を有する第1金属部材と、この第1金属部材の第2主面側に配置され、レーザ溶接部を介して第1金属部材の少なくとも一部と接合した第2金属部材と、を備える。また接合部材は、第1金属部材の第2主面側にシート状ろう材を備える。レーザ溶接部は、第1金属部材、第2金属部材及びシート状ろう材の溶融一体化物で構成される母材溶融部と、シート状ろう材の溶融物で構成されるろう材溶融部と、を備える。母材溶融部は、前記第1金属部材の第1主面から第2主面へと貫通し、かつ第2金属部材の厚さの少なくとも一部にまで連続して形成されている。ろう材溶融部は、第1金属部材、前記第2金属部材及び母材溶融部と密着している。 1. 1. Joining member The joining member of the present embodiment is arranged on the second main surface side of the first metal member having the first main surface and the second main surface, and the first metal member via the laser welded portion. A second metal member joined to at least a part of the metal member is provided. Further, the joining member includes a sheet-shaped brazing material on the second main surface side of the first metal member. The laser welded portion includes a base metal melting portion composed of a first metal member, a second metal member, and a molten material of a sheet-shaped brazing material, and a brazing material melting portion composed of a molten material of a sheet-shaped brazing material. To prepare for. The base metal melting portion penetrates from the first main surface to the second main surface of the first metal member, and is continuously formed up to at least a part of the thickness of the second metal member. The brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion.
<金属部材>
本実施形態の接合部材は、第1主面及び第2主面を有する第1金属部材と、この第1金属部材の第2主面側に配置され、レーザ溶接部を介して第1金属部材の少なくとも一部と接合した第2金属部材と、を備える。すなわち第1金属部材と第2金属部材とがレーザ接合部を介して接合されている。第1金属部材及び第2金属部材は、接合部材を構成できる限り、その形状は限定されない。板材、押出材、及び棒材のいずれであってもよく、あるいは他の形状を有するものであってもよい。 <Metal member>
The joining member of the present embodiment is arranged on the second main surface side of the first metal member having the first main surface and the second main surface, and the first metal member via the laser welded portion. A second metal member joined to at least a part of the above. That is, the first metal member and the second metal member are joined via the laser joining portion. The shapes of the first metal member and the second metal member are not limited as long as they can form a joining member. It may be a plate material, an extruded material, or a bar material, or may have another shape.
本実施形態の接合部材は、第1主面及び第2主面を有する第1金属部材と、この第1金属部材の第2主面側に配置され、レーザ溶接部を介して第1金属部材の少なくとも一部と接合した第2金属部材と、を備える。すなわち第1金属部材と第2金属部材とがレーザ接合部を介して接合されている。第1金属部材及び第2金属部材は、接合部材を構成できる限り、その形状は限定されない。板材、押出材、及び棒材のいずれであってもよく、あるいは他の形状を有するものであってもよい。 <Metal member>
The joining member of the present embodiment is arranged on the second main surface side of the first metal member having the first main surface and the second main surface, and the first metal member via the laser welded portion. A second metal member joined to at least a part of the above. That is, the first metal member and the second metal member are joined via the laser joining portion. The shapes of the first metal member and the second metal member are not limited as long as they can form a joining member. It may be a plate material, an extruded material, or a bar material, or may have another shape.
また、第1金属部材及び第2金属部材の材質は、レーザ溶接できる範囲において限定されない。例えば、アルミニウム(Al)、鉄(Fe)、銅(Cu)、チタン(Ti)、ニッケル(Ni)、またはこれらの金属を含む合金が例示される。また第1金属部材と第2金属部材の材質の組み合わせも限定されない。第1金属部材と第2金属部材とが同種材料からなってもよく、あるいは異種材料からなってもよい。
Further, the materials of the first metal member and the second metal member are not limited as long as they can be laser welded. For example, aluminum (Al), iron (Fe), copper (Cu), titanium (Ti), nickel (Ni), or alloys containing these metals are exemplified. Further, the combination of the materials of the first metal member and the second metal member is not limited. The first metal member and the second metal member may be made of the same kind of material, or may be made of different materials.
好適には、第1金属部材及び第2金属部材の一方又は両方がアルミニウム系金属からなる。アルミニウム系金属とは、純アルミニウム又はアルミニウム合金のことである。純アルミニウムとして、1000系が挙げられる。またアルミニウム合金として、2000系(Al-Cu系)合金、3000系(Al-Mn系)合金、4000系(Al-Si系)合金、5000系(Al-Mg系)合金、6000系(Al-Mg-Si系)合金、7000系(Al-Zn-Mg系)合金などが挙げられる。特に好適には、第1金属部材が1000系又は3000系合金からなる。
Preferably, one or both of the first metal member and the second metal member are made of an aluminum-based metal. The aluminum-based metal is pure aluminum or an aluminum alloy. Examples of pure aluminum include 1000 series. As aluminum alloys, 2000 series (Al-Cu series) alloys, 3000 series (Al-Mn series) alloys, 4000 series (Al-Si series) alloys, 5000 series (Al-Mg series) alloys, and 6000 series (Al-) series. Examples thereof include Mg—Si based alloys and 7000 based (Al—Zn—Mg based) alloys. Particularly preferably, the first metal member is made of a 1000 series or 3000 series alloy.
<ろう材>
本実施形態の接合部材は、第1金属部材の第2主面側にシート状ろう材を備える。すなわち、シート状ろう材は、第1金属部材の第2主面側であって、第2金属部材との間隙又は第2金属部材の周囲に配置される。シート状ろう材は、レーザ溶接時に第1金属部材及び第2金属部材の接合を補助する成分であり、その融点は、第1金属部材及び第2金属部材の融点より低い。このろう材は、第1金属部材及び第2金属部材とともに母材溶融部を形成するとともに、接合界面の周囲に広がって、ろう材溶融部を形成する。 <Blazed material>
The joining member of the present embodiment includes a sheet-shaped brazing material on the second main surface side of the first metal member. That is, the sheet-shaped brazing material is arranged on the second main surface side of the first metal member, in the gap with the second metal member, or around the second metal member. The sheet-shaped brazing filler metal is a component that assists in joining the first metal member and the second metal member during laser welding, and its melting point is lower than the melting points of the first metal member and the second metal member. This brazing filler metal forms a base metal melting portion together with the first metal member and the second metal member, and spreads around the bonding interface to form the brazing filler metal melting portion.
本実施形態の接合部材は、第1金属部材の第2主面側にシート状ろう材を備える。すなわち、シート状ろう材は、第1金属部材の第2主面側であって、第2金属部材との間隙又は第2金属部材の周囲に配置される。シート状ろう材は、レーザ溶接時に第1金属部材及び第2金属部材の接合を補助する成分であり、その融点は、第1金属部材及び第2金属部材の融点より低い。このろう材は、第1金属部材及び第2金属部材とともに母材溶融部を形成するとともに、接合界面の周囲に広がって、ろう材溶融部を形成する。 <Blazed material>
The joining member of the present embodiment includes a sheet-shaped brazing material on the second main surface side of the first metal member. That is, the sheet-shaped brazing material is arranged on the second main surface side of the first metal member, in the gap with the second metal member, or around the second metal member. The sheet-shaped brazing filler metal is a component that assists in joining the first metal member and the second metal member during laser welding, and its melting point is lower than the melting points of the first metal member and the second metal member. This brazing filler metal forms a base metal melting portion together with the first metal member and the second metal member, and spreads around the bonding interface to form the brazing filler metal melting portion.
ろう材の形態は、シート状である限り、限定されない。例えば、第1金属部材の第2主面に接合したクラッド材であってもよい。また、第2金属部材の主面に接合したクラッド材であってもよい。クラッド材は、心材とろう材を熱間圧延工程でクラッド圧延(圧着)した部材であり、ブレージングシートとも呼ばれている。ここで第1金属部材及び/又は第2金属部材が心材に相当する。クラッド材は、心材の片面にろう材を備えた片面クラッドであってもよく、あるいは両面にろう材を備えた両面クラッドであってもよい。ただし、ろう材はクラッド材に限定される訳ではない。例えば、第1金属部材及び/又は第2金属部材の少なくとも一方の主面に成膜した被覆であってもよい。被膜状ろう材(16)の成膜は、メッキ、スパッタリング、蒸着、化学気相成長法などの公知の厚膜又は薄膜形成法で行えばよい。さらに、ろう材は、金属部材とは別個の自立シート、例えば箔であってもよい。
The form of the brazing material is not limited as long as it is in the form of a sheet. For example, it may be a clad material joined to the second main surface of the first metal member. Further, it may be a clad material joined to the main surface of the second metal member. The clad material is a member obtained by clad rolling (crimping) a core material and a brazing material in a hot rolling process, and is also called a brazing sheet. Here, the first metal member and / or the second metal member corresponds to the core material. The clad material may be a single-sided clad having a brazing material on one side of the core material, or a double-sided clad having a brazing material on both sides. However, the brazing material is not limited to the clad material. For example, it may be a coating film formed on at least one main surface of the first metal member and / or the second metal member. The film-forming brazing material (16) may be formed by a known thick film or thin film forming method such as plating, sputtering, vapor deposition, or chemical vapor deposition. Further, the brazing material may be a self-standing sheet separate from the metal member, for example, a foil.
ろう材の厚さは限定されない。しかしながら、ろう材が過度に薄いと、レーザ溶接に必要な、ろう材量が少なくなり、接合不良が起こる恐れがある。ろう材の厚さは、好適には5μm以上である。
The thickness of the brazing material is not limited. However, if the brazing filler metal is excessively thin, the amount of brazing filler metal required for laser welding is reduced, which may lead to poor joining. The thickness of the brazing filler metal is preferably 5 μm or more.
ろう材の材質は、第1金属部材及び第2金属部材の材質に依存するため、これを一概に決めることはできない。第1金属部材及び第2金属部材の少なくとも一方がアルミニウム系金属からなる場合には、4000系(Al-Si系)合金、Al-Cu-Si系、Al-Zn系などが挙げられ、このうち4000系合金が好適である。4000系合金は流動性が高い。流動性の高い合金は、レーザ溶接時に第1金属部材及び第2金属部材の間隙に薄く拡がって、ろう材溶融部を形成する。そのため気密性及び水密性向上の効果に優れるとともに、接合部の応力緩和効果も期待できる。
Since the material of the brazing material depends on the material of the first metal member and the second metal member, it cannot be unconditionally determined. When at least one of the first metal member and the second metal member is made of an aluminum-based metal, 4000-based (Al—Si-based) alloys, Al—Cu—Si-based, Al—Zn-based, and the like can be mentioned. A 4000 series alloy is suitable. The 4000 series alloy has high fluidity. The highly fluid alloy spreads thinly in the gap between the first metal member and the second metal member during laser welding to form a brazing filler metal melted portion. Therefore, the effect of improving the airtightness and the watertightness is excellent, and the stress relaxation effect of the joint can be expected.
<レーザ溶接部>
レーザ溶接部は、第1金属部材の少なくとも一部と第2金属部材の少なくとも一部を接合する部位に相当する。レーザ溶接部は、母材溶融部及びろう材溶融部から構成される。ここで、母材溶融部及びろう材溶融部のそれぞれは、溶接ビード及びフィレットとも呼ばれる。 <Laser weld>
The laser welded portion corresponds to a portion where at least a part of the first metal member and at least a part of the second metal member are joined. The laser welded portion is composed of a base metal molten portion and a brazing filler metal fused portion. Here, each of the base metal melting portion and the brazing filler metal melting portion is also referred to as a weld bead and a fillet.
レーザ溶接部は、第1金属部材の少なくとも一部と第2金属部材の少なくとも一部を接合する部位に相当する。レーザ溶接部は、母材溶融部及びろう材溶融部から構成される。ここで、母材溶融部及びろう材溶融部のそれぞれは、溶接ビード及びフィレットとも呼ばれる。 <Laser weld>
The laser welded portion corresponds to a portion where at least a part of the first metal member and at least a part of the second metal member are joined. The laser welded portion is composed of a base metal molten portion and a brazing filler metal fused portion. Here, each of the base metal melting portion and the brazing filler metal melting portion is also referred to as a weld bead and a fillet.
<母材溶融部>
母材溶融部は、第1金属部材、第2金属部材及びシート状ろう材の溶融一体化物で構成される。すなわち、レーザ溶接時に、第1金属部材のレーザ光が照射される第1主面で熱が発生し、この熱がろう材及び第2金属部材に伝熱する。レーザ光を照射した領域の近傍では、第1金属部材、ろう材及び第2金属部材が高温に達し、その結果、溶融して溶湯を形成する。溶湯内部では熱対流により成分が拡散して混じり合う。レーザ光の照射部位が移動するにつれ、溶湯が冷却凝固して母材溶融部が形成される。したがって、母材溶融部は、第1金属部材、第2金属部材及びろう材に由来する成分を含む凝固物である。母材溶融部中の各成分は均一に分布してもよく、あるいは不均一に分布してもよい。例えば、母材溶融部は、場所によっては第1金属部材由来の成分を多く含んでもよく、また第2金属部材由来の成分を多く含んでもよい。さらに接合部において、ろう材由来の成分を多く含んでもよい。 <Melting part of base metal>
The base metal melting portion is composed of a first metal member, a second metal member, and a molten and integrated product of a sheet-shaped brazing material. That is, during laser welding, heat is generated on the first main surface irradiated with the laser beam of the first metal member, and this heat is transferred to the brazing material and the second metal member. In the vicinity of the region irradiated with the laser beam, the first metal member, the brazing material and the second metal member reach high temperatures, and as a result, melt to form a molten metal. Inside the molten metal, the components diffuse and mix due to heat convection. As the laser beam irradiation site moves, the molten metal cools and solidifies to form a base metal melting portion. Therefore, the base metal melting portion is a solidified product containing components derived from the first metal member, the second metal member, and the brazing material. Each component in the base metal melted portion may be uniformly distributed or may be unevenly distributed. For example, the base metal melting portion may contain a large amount of a component derived from the first metal member or may contain a large amount of a component derived from the second metal member depending on the location. Further, the joint portion may contain a large amount of components derived from the brazing material.
母材溶融部は、第1金属部材、第2金属部材及びシート状ろう材の溶融一体化物で構成される。すなわち、レーザ溶接時に、第1金属部材のレーザ光が照射される第1主面で熱が発生し、この熱がろう材及び第2金属部材に伝熱する。レーザ光を照射した領域の近傍では、第1金属部材、ろう材及び第2金属部材が高温に達し、その結果、溶融して溶湯を形成する。溶湯内部では熱対流により成分が拡散して混じり合う。レーザ光の照射部位が移動するにつれ、溶湯が冷却凝固して母材溶融部が形成される。したがって、母材溶融部は、第1金属部材、第2金属部材及びろう材に由来する成分を含む凝固物である。母材溶融部中の各成分は均一に分布してもよく、あるいは不均一に分布してもよい。例えば、母材溶融部は、場所によっては第1金属部材由来の成分を多く含んでもよく、また第2金属部材由来の成分を多く含んでもよい。さらに接合部において、ろう材由来の成分を多く含んでもよい。 <Melting part of base metal>
The base metal melting portion is composed of a first metal member, a second metal member, and a molten and integrated product of a sheet-shaped brazing material. That is, during laser welding, heat is generated on the first main surface irradiated with the laser beam of the first metal member, and this heat is transferred to the brazing material and the second metal member. In the vicinity of the region irradiated with the laser beam, the first metal member, the brazing material and the second metal member reach high temperatures, and as a result, melt to form a molten metal. Inside the molten metal, the components diffuse and mix due to heat convection. As the laser beam irradiation site moves, the molten metal cools and solidifies to form a base metal melting portion. Therefore, the base metal melting portion is a solidified product containing components derived from the first metal member, the second metal member, and the brazing material. Each component in the base metal melted portion may be uniformly distributed or may be unevenly distributed. For example, the base metal melting portion may contain a large amount of a component derived from the first metal member or may contain a large amount of a component derived from the second metal member depending on the location. Further, the joint portion may contain a large amount of components derived from the brazing material.
母材溶融部は、第1金属部材の第1主面から第2主面へと貫通し、かつ第2金属部材の厚さの少なくとも一部にまで連続して形成されている。すなわち、母材溶融部は、レーザ溶接部近傍の領域において、第1金属部材の厚さ方向全体にわたって存在し、さらに第2金属部材の厚さ方向の一部又は全体にわたって存在する。母材溶融部は、第1金属部材及び第2金属部材をまたがって、両者の界面を貫通するように形成されるということもできる。このように、レーザ接合部を、溶融一体化物たる母材溶融部で構成し、さらに第1金属部材と第2金属部材との界面を貫通するように形成することで、接合部での強度を優れたものにすることが可能になる。この点、母材溶融部は主接合部として機能するということができる。
The base metal melting portion penetrates from the first main surface to the second main surface of the first metal member, and is continuously formed up to at least a part of the thickness of the second metal member. That is, the base metal melting portion exists in the region near the laser welded portion over the entire thickness direction of the first metal member, and further exists over a part or the entire thickness direction of the second metal member. It can also be said that the base metal melting portion is formed so as to straddle the first metal member and the second metal member and penetrate the interface between the two. In this way, the laser joint is composed of the base metal melt, which is a melt-integrated product, and is further formed so as to penetrate the interface between the first metal member and the second metal member, thereby increasing the strength at the joint. It will be possible to make it excellent. In this respect, it can be said that the base metal melting portion functions as the main joint portion.
母材溶融部の形状は、特に限定されない。典型的には、第1金属部材の上面(第1主面)から第2金属部材の下面に向かって断面積が減少する形状である。このような形状として、三角形を中心軸回りに回転させた回転体(円錐)、台形を中心軸まわりに回転させた回転体(円錐台)、及び放物線を回転させた回転体(放物線回転体)などが挙げられる。いずれにしても、レーザ溶接により形成される形状であれば、限定されない。
The shape of the base metal melting part is not particularly limited. Typically, the cross section decreases from the upper surface (first main surface) of the first metal member toward the lower surface of the second metal member. As such a shape, a rotating body (cone) in which a triangle is rotated around the central axis, a rotating body (conical table) in which a trapezoid is rotated around the central axis, and a rotating body (parous line rotating body) in which a parabolic wire is rotated. And so on. In any case, the shape is not limited as long as it is a shape formed by laser welding.
<ろう材溶融部>
ろう材溶融部は、シート状ろう材の溶融物で構成される。レーザ溶接時に、母材溶融部になる溶湯周囲では、第1金属部材及び第2金属部材は、溶融するほどには高温に達していない。一方で、ろう材は、その融点が低いため溶融する。溶融したろう材が冷却凝固して、ろう材溶融部になる。したがって、ろう材溶融部は、ろう材に由来する成分を主として含む凝固物である。第1金属部材や第2金属部材由来の成分を含むことがあっても、その量は僅かである。組成及び組織を調べることで、ろう材溶融部を、母材溶融部から判別することが可能である。 <Blazed material melted part>
The brazing filler metal melt portion is composed of a sheet-shaped brazing filler metal melt. At the time of laser welding, the first metal member and the second metal member do not reach a high temperature enough to be melted around the molten metal which becomes the base metal melting portion. On the other hand, the brazing filler metal has a low melting point and therefore melts. The melted brazing filler metal cools and solidifies to form a brazing filler metal melted portion. Therefore, the brazing filler metal melted portion is a solidified product mainly containing components derived from the brazing filler metal. Even if a component derived from the first metal member or the second metal member is contained, the amount thereof is small. By examining the composition and structure, it is possible to discriminate the brazing filler metal melted portion from the base metal melted portion.
ろう材溶融部は、シート状ろう材の溶融物で構成される。レーザ溶接時に、母材溶融部になる溶湯周囲では、第1金属部材及び第2金属部材は、溶融するほどには高温に達していない。一方で、ろう材は、その融点が低いため溶融する。溶融したろう材が冷却凝固して、ろう材溶融部になる。したがって、ろう材溶融部は、ろう材に由来する成分を主として含む凝固物である。第1金属部材や第2金属部材由来の成分を含むことがあっても、その量は僅かである。組成及び組織を調べることで、ろう材溶融部を、母材溶融部から判別することが可能である。 <Blazed material melted part>
The brazing filler metal melt portion is composed of a sheet-shaped brazing filler metal melt. At the time of laser welding, the first metal member and the second metal member do not reach a high temperature enough to be melted around the molten metal which becomes the base metal melting portion. On the other hand, the brazing filler metal has a low melting point and therefore melts. The melted brazing filler metal cools and solidifies to form a brazing filler metal melted portion. Therefore, the brazing filler metal melted portion is a solidified product mainly containing components derived from the brazing filler metal. Even if a component derived from the first metal member or the second metal member is contained, the amount thereof is small. By examining the composition and structure, it is possible to discriminate the brazing filler metal melted portion from the base metal melted portion.
ろう材溶融部は、第1金属部材、前記第2金属部材及び母材溶融部と密着している。レーザ溶接時に、第1金属部材、第2金属部材及び母材溶融部からの伝熱により、ろう材が溶融して、ろう材溶融部が形成される。この際、ろう材溶融部は、第1金属部材、第2金属部材及び母材溶融部に密着接合するように形成される。
The brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion. During laser welding, the brazing filler metal is melted by heat transfer from the first metal member, the second metal member, and the base metal melting portion, and the brazing filler metal melting portion is formed. At this time, the brazing filler metal melted portion is formed so as to be tightly bonded to the first metal member, the second metal member, and the base metal melted portion.
ろう材溶融部を設けることで、接合部材の接合強度を、より一層優れたものにすることができる。すなわち、ろう材溶融部は、母材溶融部の周囲において、第1金属部材及び第2金属部材と密着接合している。接合部の幅が実質的に広くなり、接合強度が高くなる。この点、ろう材溶融部は、補助接合部として機能するということができる。
By providing the brazing material melting part, the joining strength of the joining member can be further improved. That is, the brazing filler metal melted portion is tightly joined to the first metal member and the second metal member around the base metal melted portion. The width of the joint is substantially widened, and the joint strength is increased. In this respect, it can be said that the brazing filler metal melted portion functions as an auxiliary joint portion.
また、ろう材溶融部を設けることで接合部の気密性及び水密性を高くすることが可能になる。この点を、図1(a)及び(b)を用いて説明する。図1(a)は、ろう材及びろう材溶融部をもたない接合部材の断面図であり、図1(b)は、ろう材及びろう材溶融部を備えた接合部材の断面図である。ろう材溶融部をもたない場合(図1(a))では、第1金属部材(12)と第2金属部材(14)が、母材溶融部(22)のみを介して接合される。この場合には、金属部材(12、14)の間隙を通って空気や水分が浸入する。また先述したように、レーザ溶接部たる母材溶融部(22)には凝固割れ(26)が生じることがある。凝固割れ(26)は亀裂の一種である。母材溶融部(22)に凝固割れ(26)が生じると、空気や水分が凝固割れ(26)を通って金属部材(12)の上部に浸入してしまう。そのため接合部の気密性及び水密性を確保することができない。これに対して、ろう材溶融部を備えた場合(図1(b))では、母材溶融部(22)の周囲が、ろう材(16)及び溶ろう材溶融部(24)でシールされている。したがって、たとえ凝固割れ(26)が生じたとしても、気密性及び水密性が確実に確保される。
Further, by providing the brazing material melting portion, it becomes possible to improve the airtightness and watertightness of the joint portion. This point will be described with reference to FIGS. 1 (a) and 1 (b). FIG. 1A is a cross-sectional view of a joining member having no brazing material and a brazing material melting portion, and FIG. 1B is a cross-sectional view of a joining member provided with a brazing material and a brazing material melting portion. .. When there is no brazing filler metal melted portion (FIG. 1 (a)), the first metal member (12) and the second metal member (14) are joined via only the base metal melted portion (22). In this case, air or moisture infiltrates through the gaps between the metal members (12, 14). Further, as described above, solidification cracks (26) may occur in the base metal melting portion (22) which is the laser welded portion. Solidification cracks (26) are a type of cracks. When a solidification crack (26) occurs in the base metal melting portion (22), air or moisture penetrates into the upper part of the metal member (12) through the solidification crack (26). Therefore, the airtightness and watertightness of the joint cannot be ensured. On the other hand, in the case of providing the brazing filler metal melted portion (FIG. 1 (b)), the periphery of the base metal melted portion (22) is sealed by the brazing filler metal (16) and the molten metal melted portion (24). ing. Therefore, even if solidification cracking (26) occurs, airtightness and watertightness are surely ensured.
<接合形式>
第1金属部材と第2金属部材の接合形式は、両者がレーザ接合部を介して接合されている限り、種類は限定されない。継手の種類として、重ね継手、T継手、十字継手、角継手、スカーフ継手、ヘリ継手、せぎり継手、フレア継手、当て板継手、及び重ねすみ肉継手などが知られており、いずれであってもよい。 <Solder form>
The type of joining of the first metal member and the second metal member is not limited as long as both are joined via the laser joining portion. Known types of joints include lap joints, T joints, cross joints, square joints, scarf joints, helicopter joints, shaving joints, flare joints, backing plate joints, and lap fillet joints. May be good.
第1金属部材と第2金属部材の接合形式は、両者がレーザ接合部を介して接合されている限り、種類は限定されない。継手の種類として、重ね継手、T継手、十字継手、角継手、スカーフ継手、ヘリ継手、せぎり継手、フレア継手、当て板継手、及び重ねすみ肉継手などが知られており、いずれであってもよい。 <Solder form>
The type of joining of the first metal member and the second metal member is not limited as long as both are joined via the laser joining portion. Known types of joints include lap joints, T joints, cross joints, square joints, scarf joints, helicopter joints, shaving joints, flare joints, backing plate joints, and lap fillet joints. May be good.
重ね継手を備えた接合部材の断面模式図を、図2(a)及び(b)に示す。図2(a)は接合部材の全体図であり、図2(b)は接合部近傍を示す拡大図である。この接合部材(10)では、第1金属部材(12)と第2金属部材(14)とが重ね継手を形成している。すなわち、第1金属部材(12)の第2主面の一部と第2金属部材(14)の主面の一部とが、接合部(20)を介してレーザ接合されている。また第1金属部材(12)の第2主面上、すなわち第1金属部材(12)と第2金属部材(14)との間には、シート状のろう材(16)が配置されている。さらに接合部(20)には、母材溶融部(22)と、その周囲に存在するろう材溶融部(24)と、が形成されている。
A schematic cross-sectional view of a joining member provided with a lap joint is shown in FIGS. 2 (a) and 2 (b). FIG. 2A is an overall view of the joint member, and FIG. 2B is an enlarged view showing the vicinity of the joint portion. In this joining member (10), the first metal member (12) and the second metal member (14) form a lap joint. That is, a part of the second main surface of the first metal member (12) and a part of the main surface of the second metal member (14) are laser-bonded via the joint portion (20). Further, a sheet-shaped brazing material (16) is arranged on the second main surface of the first metal member (12), that is, between the first metal member (12) and the second metal member (14). .. Further, a base metal melting portion (22) and a brazing filler metal melting portion (24) existing around the base metal melting portion (22) are formed in the joint portion (20).
T継手を備えた接合部材の断面模式図を、図3(a)及び(b)に示す。図3(a)は接合部材の全体図であり、図3(b)は接合部近傍を示す拡大図である。この接合部材(10)では、第1金属部材(12)と第2金属部材(14)とがT継手を形成して接合されている。すなわち、第1金属部材(12)の第2主面の一部と第2金属部材(14)の端面とが、接合部(20)を介してレーザ接合されている。また第1金属部材の第2主面上には、シート状ろう材(16)が配置されている。さらに接合部(20)には、母材溶融部(22)と、その周囲に存在するろう材溶融部(24)と、が形成されている。
Schematic cross-sectional views of the joining member provided with the T-joint are shown in FIGS. 3 (a) and 3 (b). FIG. 3A is an overall view of the joint member, and FIG. 3B is an enlarged view showing the vicinity of the joint portion. In this joining member (10), the first metal member (12) and the second metal member (14) form a T joint and are joined. That is, a part of the second main surface of the first metal member (12) and the end surface of the second metal member (14) are laser-bonded via the joint portion (20). Further, a sheet-shaped brazing material (16) is arranged on the second main surface of the first metal member. Further, a base metal melting portion (22) and a brazing filler metal melting portion (24) existing around the base metal melting portion (22) are formed in the joint portion (20).
2.接合部材の製造方法
本実施形態の接合部材の製造方法は、以下の工程;第1主面及び第2主面を有する第1金属部材、第2金属部材、及びシート状ろう材を準備する工程(準備工程)、準備した第1金属部材の第2主面側にシート状ろう材及び第2金属部材がこの順に配置されてなる積層体を作製する工程(積層工程)、及び積層体を構成する第1金属部材の第1主面にレーザ光を照射して、接合界面を介して第1金属部材の少なくとも一部に第2金属部材をレーザ溶接する工程(レーザ溶接工程)、を備える。またレーザ溶接する工程で、第1金属部材、第2金属部材及びシート状ろう材の一部を溶融一体化させて、レーザ溶接部の接合界面を貫通する母材溶融部を形成するとともに、前記接合界面周囲のシート状ろう材を溶融させて、ろう材溶融部を形成する。各工程の詳細について以下に説明する。 2. 2. Method of manufacturing a joining member The method of manufacturing a joining member of the present embodiment is as follows: a step of preparing a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material. (Preparation step), a step of producing a laminate in which a sheet-shaped brazing material and a second metal member are arranged in this order on the second main surface side of the prepared first metal member (lamination step), and a laminate. A step of irradiating a first main surface of the first metal member to be laser-welded to at least a part of the first metal member via a bonding interface (laser welding step) is provided. Further, in the process of laser welding, a part of the first metal member, the second metal member and the sheet-shaped brazing material are melted and integrated to form a base metal melting portion penetrating the joining interface of the laser welding portion, and the above-mentioned The sheet-like brazing material around the bonding interface is melted to form a brazing material melting portion. Details of each step will be described below.
本実施形態の接合部材の製造方法は、以下の工程;第1主面及び第2主面を有する第1金属部材、第2金属部材、及びシート状ろう材を準備する工程(準備工程)、準備した第1金属部材の第2主面側にシート状ろう材及び第2金属部材がこの順に配置されてなる積層体を作製する工程(積層工程)、及び積層体を構成する第1金属部材の第1主面にレーザ光を照射して、接合界面を介して第1金属部材の少なくとも一部に第2金属部材をレーザ溶接する工程(レーザ溶接工程)、を備える。またレーザ溶接する工程で、第1金属部材、第2金属部材及びシート状ろう材の一部を溶融一体化させて、レーザ溶接部の接合界面を貫通する母材溶融部を形成するとともに、前記接合界面周囲のシート状ろう材を溶融させて、ろう材溶融部を形成する。各工程の詳細について以下に説明する。 2. 2. Method of manufacturing a joining member The method of manufacturing a joining member of the present embodiment is as follows: a step of preparing a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material. (Preparation step), a step of producing a laminate in which a sheet-shaped brazing material and a second metal member are arranged in this order on the second main surface side of the prepared first metal member (lamination step), and a laminate. A step of irradiating a first main surface of the first metal member to be laser-welded to at least a part of the first metal member via a bonding interface (laser welding step) is provided. Further, in the process of laser welding, a part of the first metal member, the second metal member and the sheet-shaped brazing material are melted and integrated to form a base metal melting portion penetrating the joining interface of the laser welding portion, and the above-mentioned The sheet-like brazing material around the bonding interface is melted to form a brazing material melting portion. Details of each step will be described below.
<準備工程>
準備工程では、第1主面及び第2主面を有する第1金属部材、第2金属部材、及びシート状ろう材を準備する。第1金属部材、第2金属部材及びシート状ろう材については先述したとおりである。例えば、第1金属部材及びシート状ろう材として、これらが圧延接合されてなるクラッド材を用いることができ、その場合には、第1金属部材とシート状ろう材を一体化物として準備することができる。また、第2金属部材及びシート状ろう材として、これらが圧延接合されてなるクラッド材を用いることができ、その場合には、第2金属部材とシート状ろう材を一体化物として準備することができる。さらに、自立シートたる箔状のろう材を用いることができ、その場合には、第1金属部材、第2金属部材、及びシート状ろう材をそれぞれ別個に準備すればよい。 <Preparation process>
In the preparatory step, a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material are prepared. The first metal member, the second metal member, and the sheet-shaped brazing material are as described above. For example, as the first metal member and the sheet-shaped brazing material, a clad material obtained by rolling and joining them can be used, and in that case, the first metal member and the sheet-shaped brazing material can be prepared as an integrated product. can. Further, as the second metal member and the sheet-shaped brazing material, a clad material obtained by rolling and joining them can be used. In that case, the second metal member and the sheet-shaped brazing material can be prepared as an integrated product. can. Further, a foil-shaped brazing material that is a self-supporting sheet can be used, and in that case, a first metal member, a second metal member, and a sheet-shaped brazing material may be prepared separately.
準備工程では、第1主面及び第2主面を有する第1金属部材、第2金属部材、及びシート状ろう材を準備する。第1金属部材、第2金属部材及びシート状ろう材については先述したとおりである。例えば、第1金属部材及びシート状ろう材として、これらが圧延接合されてなるクラッド材を用いることができ、その場合には、第1金属部材とシート状ろう材を一体化物として準備することができる。また、第2金属部材及びシート状ろう材として、これらが圧延接合されてなるクラッド材を用いることができ、その場合には、第2金属部材とシート状ろう材を一体化物として準備することができる。さらに、自立シートたる箔状のろう材を用いることができ、その場合には、第1金属部材、第2金属部材、及びシート状ろう材をそれぞれ別個に準備すればよい。 <Preparation process>
In the preparatory step, a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material are prepared. The first metal member, the second metal member, and the sheet-shaped brazing material are as described above. For example, as the first metal member and the sheet-shaped brazing material, a clad material obtained by rolling and joining them can be used, and in that case, the first metal member and the sheet-shaped brazing material can be prepared as an integrated product. can. Further, as the second metal member and the sheet-shaped brazing material, a clad material obtained by rolling and joining them can be used. In that case, the second metal member and the sheet-shaped brazing material can be prepared as an integrated product. can. Further, a foil-shaped brazing material that is a self-supporting sheet can be used, and in that case, a first metal member, a second metal member, and a sheet-shaped brazing material may be prepared separately.
<積層工程>
積層工程では、準備した第1金属部材の第2主面側にシート状ろう材及び第2金属部材がこの順に配置されてなる積層体を作製する。この際、好ましくは、第1金属部材と第2金属部材の間に、シート状ろう材とともにフラックスを配置する。フラックスは、金属部材とろう材との接合を促す成分である。金属部材表面には自然酸化膜が生成していることがある。このような酸化膜は、金属部材とろう材との間の金属接触を阻害して、接合不良を引き起こす恐れがある。ろう材より融点の低いフラックスを用いると、このフラックスが、溶接時に金属部材表面を濡らして、表面酸化膜を破壊する。そのため接合不良を抑制することができる。 <Laminating process>
In the laminating step, a laminated body is produced in which the sheet-shaped brazing material and the second metal member are arranged in this order on the second main surface side of the prepared first metal member. At this time, preferably, a flux is arranged together with the sheet-shaped brazing material between the first metal member and the second metal member. Flux is a component that promotes bonding between a metal member and a brazing material. A natural oxide film may be formed on the surface of the metal member. Such an oxide film may hinder metal contact between the metal member and the brazing material and cause poor bonding. When a flux having a melting point lower than that of the brazing material is used, this flux wets the surface of the metal member during welding and destroys the surface oxide film. Therefore, poor joining can be suppressed.
積層工程では、準備した第1金属部材の第2主面側にシート状ろう材及び第2金属部材がこの順に配置されてなる積層体を作製する。この際、好ましくは、第1金属部材と第2金属部材の間に、シート状ろう材とともにフラックスを配置する。フラックスは、金属部材とろう材との接合を促す成分である。金属部材表面には自然酸化膜が生成していることがある。このような酸化膜は、金属部材とろう材との間の金属接触を阻害して、接合不良を引き起こす恐れがある。ろう材より融点の低いフラックスを用いると、このフラックスが、溶接時に金属部材表面を濡らして、表面酸化膜を破壊する。そのため接合不良を抑制することができる。 <Laminating process>
In the laminating step, a laminated body is produced in which the sheet-shaped brazing material and the second metal member are arranged in this order on the second main surface side of the prepared first metal member. At this time, preferably, a flux is arranged together with the sheet-shaped brazing material between the first metal member and the second metal member. Flux is a component that promotes bonding between a metal member and a brazing material. A natural oxide film may be formed on the surface of the metal member. Such an oxide film may hinder metal contact between the metal member and the brazing material and cause poor bonding. When a flux having a melting point lower than that of the brazing material is used, this flux wets the surface of the metal member during welding and destroys the surface oxide film. Therefore, poor joining can be suppressed.
フラックスは、ろう材より融点が低く、且つ金属部材の表面酸化膜を破壊できるものであれば、限定されない。このようなフラックスとして、非腐食性のフッ化物系フラックスや腐食性の塩化物フラックスを挙げることができ、非腐食性フラックスが好適である。非腐食性フラックスは、金属部材やろう材を腐食する恐れがない。また溶接後の接合部材を洗浄してフラックスを除去する必要がなくなり、製造コスト低減につながる。非腐食性フラックスとして、例えばNOCOLOK(登録商標)が挙げられる。
The flux is not limited as long as it has a lower melting point than the brazing material and can destroy the surface oxide film of the metal member. Examples of such a flux include a non-corrosive fluoride-based flux and a corrosive chloride flux, and a non-corrosive flux is suitable. The non-corrosive flux does not corrode metal parts or brazing materials. In addition, it is not necessary to clean the joined member after welding to remove the flux, which leads to a reduction in manufacturing cost. Examples of the non-corrosive flux include NOCOLOK (registered trademark).
積層体の作製手順は、特に限定されない。第1金属部材及びシート状ろう材が圧延接合されてなるクラッド材を用いる場合には、クラッド材のろう材表面にフラックスを塗布し、その上に第2金属部材を載置すればよい。第2金属部材及びシート状ろう材が圧延接合されてなるクラッド材を用いる場合には、クラッド材のろう材表面にフラックスを塗布し、その上に第1金属部材を載置すればよい。自立シートたる箔状ろう材を用いる場合には、ろう材表面にフラックスを塗布した後に第1金属部材、ろう材、第2部金属材の順に置けばよい。あるいは第1金属部材と第2金属材の主面にフラックスを塗布し、塗布したフラックスの間に箔状ろう材を置いてもよい。さらには、第1金属部材表面に、公知の薄膜形成法を用いて被膜状ろう材を成膜し、被膜状ろう材表面にフラックスを塗布した後に第2金属部材を載置する手段も考えられる。
The procedure for producing the laminated body is not particularly limited. When a clad material obtained by rolling and joining a first metal member and a sheet-shaped brazing material is used, a flux may be applied to the surface of the brazing material of the clad material, and the second metal member may be placed on the flux. When a clad material obtained by rolling and joining a second metal member and a sheet-shaped brazing material is used, a flux may be applied to the surface of the brazing material of the clad material, and the first metal member may be placed on the flux. When a foil-like brazing material as a self-supporting sheet is used, the first metal member, the brazing material, and the second metal material may be placed in this order after applying flux to the surface of the brazing material. Alternatively, a flux may be applied to the main surfaces of the first metal member and the second metal material, and a foil-like brazing material may be placed between the applied fluxes. Further, a means of forming a film-like brazing material on the surface of the first metal member by using a known thin film forming method, applying a flux to the surface of the film-like brazing material, and then placing the second metal member on the surface is also conceivable. ..
<レーザ溶接工程>
レーザ溶接工程では、積層体を構成する第1金属部材の第1主面にレーザ光を照射して、接合界面を介して第1金属部材の少なくとも一部に第2金属部材をレーザ溶接する。
この工程では、第1金属部材、第2金属部材及びシート状ろう材の一部を溶融一体化させて、レーザ溶接部の接合界面を貫通する母材溶融部を形成するとともに、前記接合界面周囲のシート状ろう材を溶融させて、ろう材溶融部を形成する。 <Laser welding process>
In the laser welding step, the first main surface of the first metal member constituting the laminated body is irradiated with laser light, and the second metal member is laser welded to at least a part of the first metal member via the bonding interface.
In this step, a part of the first metal member, the second metal member, and the sheet-shaped brazing material are melt-integrated to form a base metal melting portion penetrating the joining interface of the laser welded portion, and the periphery of the joining interface. The sheet-shaped brazing filler metal is melted to form a brazing filler metal melted portion.
レーザ溶接工程では、積層体を構成する第1金属部材の第1主面にレーザ光を照射して、接合界面を介して第1金属部材の少なくとも一部に第2金属部材をレーザ溶接する。
この工程では、第1金属部材、第2金属部材及びシート状ろう材の一部を溶融一体化させて、レーザ溶接部の接合界面を貫通する母材溶融部を形成するとともに、前記接合界面周囲のシート状ろう材を溶融させて、ろう材溶融部を形成する。 <Laser welding process>
In the laser welding step, the first main surface of the first metal member constituting the laminated body is irradiated with laser light, and the second metal member is laser welded to at least a part of the first metal member via the bonding interface.
In this step, a part of the first metal member, the second metal member, and the sheet-shaped brazing material are melt-integrated to form a base metal melting portion penetrating the joining interface of the laser welded portion, and the periphery of the joining interface. The sheet-shaped brazing filler metal is melted to form a brazing filler metal melted portion.
レーザ溶接工程を、図4を用いて説明する。この工程では、積層体を構成する第1金属部材(12)の第1主面(図中の上面)にレーザ光(28)を照射して、第1金属部材(12)の少なくとも一部に第2金属部材(14)をレーザ溶接する。レーザ光(28)は図中矢印で示す方向に移動する。この工程で、第1金属部材(12)、第2金属部材(14)及びシート状ろう材(16)の一部を溶融一体化させて母材溶融部(22)を形成するとともに、その周囲のシート状ろう材(16)を溶融させて、ろう材溶融部(24)を形成する。
The laser welding process will be described with reference to FIG. In this step, the first main surface (upper surface in the drawing) of the first metal member (12) constituting the laminated body is irradiated with the laser beam (28) to cover at least a part of the first metal member (12). The second metal member (14) is laser welded. The laser beam (28) moves in the direction indicated by the arrow in the figure. In this step, a part of the first metal member (12), the second metal member (14), and the sheet-shaped brazing material (16) are melt-integrated to form a base metal melting portion (22), and the surroundings thereof are formed. The sheet-shaped brazing material (16) is melted to form a brazing material melting portion (24).
金属部材の主面にレーザ光を照射すると、レーザエネルギーの一部が板材に吸収されて、その表面が急速に加熱される。生じた熱は伝導により板材内部に伝達される。また板材表面は瞬時に溶融・気化して溶融池が形成されるとともに、蒸気圧の高い成分が蒸発物となって噴出して溶融池の表面にくぼみを形成する。くぼみに照射されたレーザ光は、溶融池に吸収され、溶融・気化及び蒸発物の噴出を繰り返して、溶融池の中心に深穴(キーホール)を形成する。レーザ光の移動に伴いキーホールは移動する。また溶融池は急冷されて凝固する。冷却凝固した溶融池を溶接部又は溶接ビードという。溶融部の深さを溶け込み深さという。
When the main surface of a metal member is irradiated with laser light, a part of the laser energy is absorbed by the plate material, and the surface is rapidly heated. The generated heat is transferred to the inside of the plate by conduction. In addition, the surface of the plate material is instantly melted and vaporized to form a molten pool, and components with high vapor pressure are ejected as evaporation to form dents on the surface of the molten pool. The laser beam radiated to the depression is absorbed by the molten pool, and repeatedly melts, vaporizes, and ejects evaporation to form a deep hole (key hole) in the center of the molten pool. The keyhole moves with the movement of the laser beam. In addition, the molten pool is rapidly cooled and solidified. A molten pool that has been cooled and solidified is called a weld or a weld bead. The depth of the molten part is called the melting depth.
レーザ照射の条件を調整することで、溶け込み深さを第1金属部材の厚さより大きくすることができる。この場合には、溶融池が第1金属部材及びろう材を貫通して、第2金属部材の内部にまで到達する。すなわち第1金属部材、第2金属部材及びろう材の一部を溶融させ、その結果、第1金属部材と第2金属部材とを重ね貫通溶接することができる。溶融池内の溶湯は対流しており、この対流により、溶湯を構成する金属部材とろう材の成分が混じり合う。溶融池が冷却凝固すると、金属部材とろう材の各成分を含む母材溶融部が形成される。母材溶融部は第1金属部材と第2金属部材にまたがって形成されるため、両者の界面に接合部を形成する。この接合部が形成される界面が接合界面である。
By adjusting the laser irradiation conditions, the penetration depth can be made larger than the thickness of the first metal member. In this case, the molten pool penetrates the first metal member and the brazing material and reaches the inside of the second metal member. That is, a part of the first metal member, the second metal member, and the brazing material can be melted, and as a result, the first metal member and the second metal member can be overlapped and welded. The molten metal in the molten pool is convected, and this convection mixes the metal members constituting the molten metal with the components of the brazing material. When the molten pool is cooled and solidified, a base metal molten portion containing each component of the metal member and the brazing filler metal is formed. Since the base metal melting portion is formed straddling the first metal member and the second metal member, a joint portion is formed at the interface between the first metal member and the second metal member. The interface on which this joint is formed is the joint interface.
レーザ溶接の際、溶融池周囲の金属部材は、熱影響を受けるものの、溶融しない。一方で融点の低いろう材は溶融する。すなわちレーザ溶接により形成された溶融部をヒートブリッジとして、ろう材とフラックスに熱が伝わり、ろう材とフラックスが溶融及び濡れ拡がることで、ろう付けされる。重ね継手を作製する場合には、第1金属部材と第2金属部材の隙間を充填するようにろう材が濡れ拡がる。濡れ拡がったろう材は冷却してろう材溶融部を形成する。
During laser welding, the metal members around the molten pool are affected by heat, but do not melt. On the other hand, brazing filler metal with a low melting point melts. That is, heat is transferred to the brazing material and the flux by using the molten portion formed by laser welding as a heat bridge, and the brazing material and the flux are melted and wetted and spread to be brazed. When the lap joint is manufactured, the brazing material wets and spreads so as to fill the gap between the first metal member and the second metal member. The wet and spread brazing filler metal is cooled to form a brazing filler metal melted portion.
なお母材溶融部及びろう材溶融部は、接合部材断面において組織観察や組成分析を行うことでその領域を調べることができる。例えば、母材溶融部は、その組成が第1金属部材、第2金属部材及びろう材とは異なっている。また急冷しているため、その組織が他の部位とは異なっている。したがって組織及び組成を調べることで、母材溶融部及びろう材溶融部の領域を確定することができる。
The regions of the base metal melting part and the brazing material melting part can be investigated by observing the structure and analyzing the composition in the cross section of the joined member. For example, the composition of the base metal melting portion is different from that of the first metal member, the second metal member, and the brazing material. Also, because it is rapidly cooled, its tissue is different from other parts. Therefore, by examining the structure and composition, the regions of the base metal melting portion and the brazing filler metal melting portion can be determined.
レーザ溶接の条件は、本実施形態の接合部材を製造できる限り、特に限定されない。レーザ源として、CO2レーザ、YAGレーザ、半導体レーザ、LD励起固体レーザ、ファイバーレーザなどの公知のレーザを用いることができる。またレーザ発振は連続発振でもよく、あるいはパルス発振であってもよい。さらにレーザ出力、焦点距離、及び溶接速度などの条件も、本実施形態の接合部材が得られる限り、限定されない。
The conditions of laser welding are not particularly limited as long as the joining member of the present embodiment can be manufactured. As the laser source, a known laser such as a CO 2 laser, a YAG laser, a semiconductor laser, an LD-pumped solid-state laser, or a fiber laser can be used. Further, the laser oscillation may be continuous oscillation or pulse oscillation. Further, conditions such as laser output, focal length, and welding speed are not limited as long as the joining member of the present embodiment can be obtained.
レーザ溶接の最適条件は、金属部材やろう材の材質や厚さに依存するため、これを一概に決めることはできない。例えば、溶接速度については、これを0.5~5m/分にしてもよいが、これに限定される訳ではない。
The optimum conditions for laser welding depend on the material and thickness of the metal member and brazing material, so this cannot be unequivocally determined. For example, the welding speed may be set to 0.5 to 5 m / min, but the welding speed is not limited to this.
必要に応じて、レーザ溶接を経た接合部材を洗浄する洗浄工程を設けてもよい。特に腐食性のフラックスを用いた場合には、洗浄処理を行って残留フラックスを除去することが望ましい。一方で非腐食性のフラックスを用いた場合には、洗浄処理を行わなくてもよい。
If necessary, a cleaning step may be provided to clean the joined member that has undergone laser welding. In particular, when a corrosive flux is used, it is desirable to perform a cleaning treatment to remove the residual flux. On the other hand, when a non-corrosive flux is used, the cleaning treatment may not be performed.
このようにして本実施形態の接合部材を得ることができる。製造後の接合部材は、母材溶融部とろう材溶融部の両方を備えるが故に、接合部での強度が優れている。また接合部での気密性及び水密性が確実に確保されている。
In this way, the joining member of the present embodiment can be obtained. Since the joint member after production includes both a base metal melting portion and a brazing filler metal melting portion, the strength at the joining portion is excellent. In addition, airtightness and watertightness at the joint are ensured.
なお、十字継手、角継手、スカーフ継手、ヘリ継手、せぎり継手、フレア継手、当て板継手、及び重ねすみ肉継手を形成する接合部材の一例、及びこれらの接合部材を製造する際にレーザ照射を行う方法のレーザ入射の方向を、図5~図19に示す
An example of a joint member forming a cross joint, a square joint, a scarf joint, a helicopter joint, a shaving joint, a flare joint, a backing plate joint, and a lap fillet joint, and laser irradiation when manufacturing these joint members. The direction of laser incident in the method of performing the above is shown in FIGS. 5 to 19.
本発明を、以下の実施例及び比較例を用いて更に詳細に説明する。しかしながら本発明は以下の実施例に限定されるものではない。
The present invention will be described in more detail with reference to the following examples and comparative examples. However, the present invention is not limited to the following examples.
(1)接合部材の作製
[例1]
例1では、第1金属部材及びろう材が接合されたクラッド材と、第2金属部材及びろう材が接合されたクラッド材と、をレーザ溶接して接合部材を作製した。接合部材の作製は、以下の手順で行った。 (1) Preparation of joining member [Example 1]
In Example 1, a clad material to which the first metal member and the brazing material were joined and a clad material to which the second metal member and the brazing material were joined were laser-welded to prepare a joined member. The joining member was manufactured by the following procedure.
[例1]
例1では、第1金属部材及びろう材が接合されたクラッド材と、第2金属部材及びろう材が接合されたクラッド材と、をレーザ溶接して接合部材を作製した。接合部材の作製は、以下の手順で行った。 (1) Preparation of joining member [Example 1]
In Example 1, a clad material to which the first metal member and the brazing material were joined and a clad material to which the second metal member and the brazing material were joined were laser-welded to prepare a joined member. The joining member was manufactured by the following procedure.
<準備工程>
上材として、A3003材(Al-Mn系合金)とA4343材(Al-Si系合金)とを熱間圧延によって接合した板状クラッド材を準備した。このクラッド材は総厚が1.6mmであり、A4343材の厚さは総厚の約7%であった。また下材として、上材と同じクラッド材を準備した。上材(クラッド材)のA3003材が第1金属部材に相当し、A4343材がろう材に相当する。また下材(クラッド材)のA3003材が第2金属部材に相当し、A4343材がろう材に相当する。 <Preparation process>
As the upper material, a plate-shaped clad material in which A3003 material (Al—Mn-based alloy) and A4343 material (Al—Si-based alloy) were joined by hot rolling was prepared. The total thickness of this clad material was 1.6 mm, and the thickness of the A4343 material was about 7% of the total thickness. Also, as the lower material, the same clad material as the upper material was prepared. The upper material (clad material) A3003 material corresponds to the first metal member, and the A4343 material corresponds to the brazing material. Further, the lower material (clad material) A3003 material corresponds to the second metal member, and the A4343 material corresponds to the brazing material.
上材として、A3003材(Al-Mn系合金)とA4343材(Al-Si系合金)とを熱間圧延によって接合した板状クラッド材を準備した。このクラッド材は総厚が1.6mmであり、A4343材の厚さは総厚の約7%であった。また下材として、上材と同じクラッド材を準備した。上材(クラッド材)のA3003材が第1金属部材に相当し、A4343材がろう材に相当する。また下材(クラッド材)のA3003材が第2金属部材に相当し、A4343材がろう材に相当する。 <Preparation process>
As the upper material, a plate-shaped clad material in which A3003 material (Al—Mn-based alloy) and A4343 material (Al—Si-based alloy) were joined by hot rolling was prepared. The total thickness of this clad material was 1.6 mm, and the thickness of the A4343 material was about 7% of the total thickness. Also, as the lower material, the same clad material as the upper material was prepared. The upper material (clad material) A3003 material corresponds to the first metal member, and the A4343 material corresponds to the brazing material. Further, the lower material (clad material) A3003 material corresponds to the second metal member, and the A4343 material corresponds to the brazing material.
<積層工程>
上材と下材とを、図20に示すようにフラックスを介して積層した。具体的には、上材のろう材表面にNOCOLOKフラックスを塗布した。次いで、フラックスを塗布した上材表面と下材のろう材表面とが対向するように、上材及び下材を積層した。得られた積層体は、上から下に向かって、上材[A3003(第1金属部材)/A4343(ろう材)]/フラックス/下材[A4343(ろう材)/A3003(第2金属部材)]の層構成を有していた。 <Laminating process>
The upper material and the lower material were laminated via a flux as shown in FIG. Specifically, NOCOLOK flux was applied to the surface of the brazing material of the upper material. Next, the upper material and the lower material were laminated so that the surface of the upper material coated with the flux and the surface of the brazing material of the lower material faced each other. From the top to the bottom, the obtained laminated body has an upper material [A3003 (first metal member) / A4343 (wazing material)] / flux / lower material [A4343 (wazing material) / A3003 (second metal member)). ] Had a layered structure.
上材と下材とを、図20に示すようにフラックスを介して積層した。具体的には、上材のろう材表面にNOCOLOKフラックスを塗布した。次いで、フラックスを塗布した上材表面と下材のろう材表面とが対向するように、上材及び下材を積層した。得られた積層体は、上から下に向かって、上材[A3003(第1金属部材)/A4343(ろう材)]/フラックス/下材[A4343(ろう材)/A3003(第2金属部材)]の層構成を有していた。 <Laminating process>
The upper material and the lower material were laminated via a flux as shown in FIG. Specifically, NOCOLOK flux was applied to the surface of the brazing material of the upper material. Next, the upper material and the lower material were laminated so that the surface of the upper material coated with the flux and the surface of the brazing material of the lower material faced each other. From the top to the bottom, the obtained laminated body has an upper material [A3003 (first metal member) / A4343 (wazing material)] / flux / lower material [A4343 (wazing material) / A3003 (second metal member)). ] Had a layered structure.
<レーザ溶接工程>
積層体に、図21に示すようにレーザを照射して、上材と下材とを接合した。具体的には、積層体を構成する上材表面の略中央部を、走査しながらレーザ光を照射した。照射は、レーザ出力2.0kWの条件で行った。これにより上材と下材とがレーザ照射部で接合した接合部材が得られた。 <Laser welding process>
As shown in FIG. 21, the laminated body was irradiated with a laser to join the upper material and the lower material. Specifically, the laser beam was irradiated while scanning the substantially central portion of the surface of the upper material constituting the laminated body. Irradiation was performed under the condition of a laser output of 2.0 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
積層体に、図21に示すようにレーザを照射して、上材と下材とを接合した。具体的には、積層体を構成する上材表面の略中央部を、走査しながらレーザ光を照射した。照射は、レーザ出力2.0kWの条件で行った。これにより上材と下材とがレーザ照射部で接合した接合部材が得られた。 <Laser welding process>
As shown in FIG. 21, the laminated body was irradiated with a laser to join the upper material and the lower material. Specifically, the laser beam was irradiated while scanning the substantially central portion of the surface of the upper material constituting the laminated body. Irradiation was performed under the condition of a laser output of 2.0 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
[例2]
例2では、第1金属部材及びろう材が接合されたクラッド材と、第2金属部材と、をレーザ溶接して接合部材を作製した。接合部材の作製は、以下の手順で行った。 [Example 2]
In Example 2, the clad material to which the first metal member and the brazing material were bonded and the second metal member were laser welded to prepare a bonded member. The joining member was manufactured by the following procedure.
例2では、第1金属部材及びろう材が接合されたクラッド材と、第2金属部材と、をレーザ溶接して接合部材を作製した。接合部材の作製は、以下の手順で行った。 [Example 2]
In Example 2, the clad material to which the first metal member and the brazing material were bonded and the second metal member were laser welded to prepare a bonded member. The joining member was manufactured by the following procedure.
<準備工程>
上材として、A3003材とA4343材とを熱間圧延によって接合した板状クラッド材を準備した。このクラッド材は総厚が2.0mmであり、A4343材の厚さは総厚の約7%であった。また下材としてA6063押出材を準備した。上材(クラッド材)のA3003材が第1金属部材に相当し、A4343材がろう材に相当する。また下材(A6063押出材)が第2金属部材に相当する。 <Preparation process>
As the upper material, a plate-shaped clad material in which A3003 material and A4343 material were joined by hot rolling was prepared. The total thickness of this clad material was 2.0 mm, and the thickness of the A4343 material was about 7% of the total thickness. In addition, A6063 extruded material was prepared as a lower material. The upper material (clad material) A3003 material corresponds to the first metal member, and the A4343 material corresponds to the brazing material. Further, the lower material (A6063 extruded material) corresponds to the second metal member.
上材として、A3003材とA4343材とを熱間圧延によって接合した板状クラッド材を準備した。このクラッド材は総厚が2.0mmであり、A4343材の厚さは総厚の約7%であった。また下材としてA6063押出材を準備した。上材(クラッド材)のA3003材が第1金属部材に相当し、A4343材がろう材に相当する。また下材(A6063押出材)が第2金属部材に相当する。 <Preparation process>
As the upper material, a plate-shaped clad material in which A3003 material and A4343 material were joined by hot rolling was prepared. The total thickness of this clad material was 2.0 mm, and the thickness of the A4343 material was about 7% of the total thickness. In addition, A6063 extruded material was prepared as a lower material. The upper material (clad material) A3003 material corresponds to the first metal member, and the A4343 material corresponds to the brazing material. Further, the lower material (A6063 extruded material) corresponds to the second metal member.
<積層工程>
上材と下材とを、図22に示すようにフラックスを介して積層した。具体的には、上材のろう材表面にNOCOLOKフラックスを塗布した。次いで、フラックスを塗布した上材表面と下材表面とが対向するように、上材及び下材を積層した。得られた積層体は、上から下に向かって、上材[A3003(第1金属部材)/A4343(ろう材)]/フラックス/下材[A6003(第2金属部材)]の層構成を有していた。 <Laminating process>
The upper material and the lower material were laminated via a flux as shown in FIG. Specifically, NOCOLOK flux was applied to the surface of the brazing material of the upper material. Next, the upper material and the lower material were laminated so that the surface of the upper material coated with the flux and the surface of the lower material face each other. The obtained laminate has a layer structure of upper material [A3003 (first metal member) / A4343 (wax material)] / flux / lower material [A6003 (second metal member)] from top to bottom. Was.
上材と下材とを、図22に示すようにフラックスを介して積層した。具体的には、上材のろう材表面にNOCOLOKフラックスを塗布した。次いで、フラックスを塗布した上材表面と下材表面とが対向するように、上材及び下材を積層した。得られた積層体は、上から下に向かって、上材[A3003(第1金属部材)/A4343(ろう材)]/フラックス/下材[A6003(第2金属部材)]の層構成を有していた。 <Laminating process>
The upper material and the lower material were laminated via a flux as shown in FIG. Specifically, NOCOLOK flux was applied to the surface of the brazing material of the upper material. Next, the upper material and the lower material were laminated so that the surface of the upper material coated with the flux and the surface of the lower material face each other. The obtained laminate has a layer structure of upper material [A3003 (first metal member) / A4343 (wax material)] / flux / lower material [A6003 (second metal member)] from top to bottom. Was.
<レーザ溶接工程>
積層体に、図23に示すようにレーザを照射して、上材と下材とを接合した。照射は、レーザ出力2.6kWの条件で行った。これにより上材と下材とがレーザ照射部で接合した接合部材が得られた。 <Laser welding process>
The laminated body was irradiated with a laser as shown in FIG. 23 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.6 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
積層体に、図23に示すようにレーザを照射して、上材と下材とを接合した。照射は、レーザ出力2.6kWの条件で行った。これにより上材と下材とがレーザ照射部で接合した接合部材が得られた。 <Laser welding process>
The laminated body was irradiated with a laser as shown in FIG. 23 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.6 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
[例3]
例3では、第1金属部材と第2金属部材とを、箔状ろう材を介してレーザ溶接した。接合部材の作製は、以下の手順で行った。 [Example 3]
In Example 3, the first metal member and the second metal member were laser-welded via a foil-like brazing material. The joining member was manufactured by the following procedure.
例3では、第1金属部材と第2金属部材とを、箔状ろう材を介してレーザ溶接した。接合部材の作製は、以下の手順で行った。 [Example 3]
In Example 3, the first metal member and the second metal member were laser-welded via a foil-like brazing material. The joining member was manufactured by the following procedure.
<準備工程>
上材としてA3003板材(厚さ2.0mm)を準備し、下材としてA6063押出材(厚さ2.0mm)を準備した。A3003板材(上材)が第1金属部材に相当し、A6063押出材(下材)が第2金属部材に相当する。また、ろう材としてA4045箔材(厚さ0.06mm)を準備した。 <Preparation process>
An A3003 plate (thickness 2.0 mm) was prepared as the upper material, and an A6063 extruded material (thickness 2.0 mm) was prepared as the lower material. The A3003 plate material (upper material) corresponds to the first metal member, and the A6063 extruded material (lower material) corresponds to the second metal member. Further, an A4045 foil material (thickness 0.06 mm) was prepared as a brazing material.
上材としてA3003板材(厚さ2.0mm)を準備し、下材としてA6063押出材(厚さ2.0mm)を準備した。A3003板材(上材)が第1金属部材に相当し、A6063押出材(下材)が第2金属部材に相当する。また、ろう材としてA4045箔材(厚さ0.06mm)を準備した。 <Preparation process>
An A3003 plate (thickness 2.0 mm) was prepared as the upper material, and an A6063 extruded material (thickness 2.0 mm) was prepared as the lower material. The A3003 plate material (upper material) corresponds to the first metal member, and the A6063 extruded material (lower material) corresponds to the second metal member. Further, an A4045 foil material (thickness 0.06 mm) was prepared as a brazing material.
<積層工程>
上材と下材とを、図24に示すように、ろう材及びフラックスを介して積層した。具体的には、上材及びろう材のそれぞれの表面にNOCOLOKフラックスを塗布した。フラックスが塗布された上材表面とフラックスが塗布されないろう材表面とが対向するように、上材及びろう材を積層し、さらに、フラックスが塗布されたろう材表面と下材表面とが対向するように、ろう材及び下材を積層した。得られた積層体は、上から下に向かって、上材[A3003板材(第1金属部材)]/フラックス/A4045箔材(ろう材)/フラックス/下材[A6063押出材(第2金属部材)]の層構成を有していた。 <Laminating process>
As shown in FIG. 24, the upper material and the lower material were laminated via a brazing material and a flux. Specifically, NOCOLOK flux was applied to the respective surfaces of the upper material and the brazing material. The upper material and the brazing material are laminated so that the surface of the upper material coated with the flux and the surface of the brazing material not coated with the flux face each other, and further, the surface of the brazing material coated with the flux and the surface of the lower material face each other. A flux material and a lower material were laminated on the surface. From the top to the bottom, the obtained laminated body has an upper material [A3003 plate material (first metal member)] / flux / A4045 foil material (wax material) / flux / lower material [A6063 extruded material (second metal member). )] Had a layered structure.
上材と下材とを、図24に示すように、ろう材及びフラックスを介して積層した。具体的には、上材及びろう材のそれぞれの表面にNOCOLOKフラックスを塗布した。フラックスが塗布された上材表面とフラックスが塗布されないろう材表面とが対向するように、上材及びろう材を積層し、さらに、フラックスが塗布されたろう材表面と下材表面とが対向するように、ろう材及び下材を積層した。得られた積層体は、上から下に向かって、上材[A3003板材(第1金属部材)]/フラックス/A4045箔材(ろう材)/フラックス/下材[A6063押出材(第2金属部材)]の層構成を有していた。 <Laminating process>
As shown in FIG. 24, the upper material and the lower material were laminated via a brazing material and a flux. Specifically, NOCOLOK flux was applied to the respective surfaces of the upper material and the brazing material. The upper material and the brazing material are laminated so that the surface of the upper material coated with the flux and the surface of the brazing material not coated with the flux face each other, and further, the surface of the brazing material coated with the flux and the surface of the lower material face each other. A flux material and a lower material were laminated on the surface. From the top to the bottom, the obtained laminated body has an upper material [A3003 plate material (first metal member)] / flux / A4045 foil material (wax material) / flux / lower material [A6063 extruded material (second metal member). )] Had a layered structure.
<レーザ溶接工程>
積層体に、図25に示すようにレーザを照射して、上材と下材とを接合した。照射は、レーザ出力2.4kWの条件で行った。これにより上材と下材とがレーザ照射部で接合した接合部材が得られた。 <Laser welding process>
The laminated body was irradiated with a laser as shown in FIG. 25 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.4 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
積層体に、図25に示すようにレーザを照射して、上材と下材とを接合した。照射は、レーザ出力2.4kWの条件で行った。これにより上材と下材とがレーザ照射部で接合した接合部材が得られた。 <Laser welding process>
The laminated body was irradiated with a laser as shown in FIG. 25 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.4 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
[例4(比較)]
例4では、第1金属部材と第2金属部材とを、ろう材及びフラックスのいずれも用いずにレーザ溶接した。接合部材の作製は、以下の手順で行った。 [Example 4 (comparison)]
In Example 4, the first metal member and the second metal member were laser welded without using any brazing material or flux. The joining member was manufactured by the following procedure.
例4では、第1金属部材と第2金属部材とを、ろう材及びフラックスのいずれも用いずにレーザ溶接した。接合部材の作製は、以下の手順で行った。 [Example 4 (comparison)]
In Example 4, the first metal member and the second metal member were laser welded without using any brazing material or flux. The joining member was manufactured by the following procedure.
<準備工程>
上材としてA3003板材(厚さ2.0mm)を準備し、下材としてA6063押出材(厚さ2.0mm)を準備した。A3003板材(上材)が第1金属部材に相当し、A6063押出材(下材)が第2金属部材に相当する。 <Preparation process>
An A3003 plate (thickness 2.0 mm) was prepared as the upper material, and an A6063 extruded material (thickness 2.0 mm) was prepared as the lower material. The A3003 plate material (upper material) corresponds to the first metal member, and the A6063 extruded material (lower material) corresponds to the second metal member.
上材としてA3003板材(厚さ2.0mm)を準備し、下材としてA6063押出材(厚さ2.0mm)を準備した。A3003板材(上材)が第1金属部材に相当し、A6063押出材(下材)が第2金属部材に相当する。 <Preparation process>
An A3003 plate (thickness 2.0 mm) was prepared as the upper material, and an A6063 extruded material (thickness 2.0 mm) was prepared as the lower material. The A3003 plate material (upper material) corresponds to the first metal member, and the A6063 extruded material (lower material) corresponds to the second metal member.
<積層工程>
上材と下材とを、図26に示すように積層した。得られた積層体は、上から下に向かって、上材[A3003板材(第1金属部材)]/下材[A6063押出材(第2金属部材)]の層構成を有していた。 <Laminating process>
The upper material and the lower material were laminated as shown in FIG. 26. The obtained laminate had a layer structure of an upper material [A3003 plate material (first metal member)] / lower material [A6063 extruded material (second metal member)] from top to bottom.
上材と下材とを、図26に示すように積層した。得られた積層体は、上から下に向かって、上材[A3003板材(第1金属部材)]/下材[A6063押出材(第2金属部材)]の層構成を有していた。 <Laminating process>
The upper material and the lower material were laminated as shown in FIG. 26. The obtained laminate had a layer structure of an upper material [A3003 plate material (first metal member)] / lower material [A6063 extruded material (second metal member)] from top to bottom.
<レーザ溶接工程>
積層体に、図27に示すようにレーザを照射して、上材と下材とを接合した。照射は、レーザ出力2.2kWの条件で行った。これにより上材と下材とがレーザ照射部で接合した接合部材が得られた。 <Laser welding process>
The laminated body was irradiated with a laser as shown in FIG. 27 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.2 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
積層体に、図27に示すようにレーザを照射して、上材と下材とを接合した。照射は、レーザ出力2.2kWの条件で行った。これにより上材と下材とがレーザ照射部で接合した接合部材が得られた。 <Laser welding process>
The laminated body was irradiated with a laser as shown in FIG. 27 to join the upper material and the lower material. Irradiation was performed under the condition of laser output of 2.2 kW. As a result, a joining member in which the upper material and the lower material were joined by the laser irradiation portion was obtained.
例1~例4について、接合部材作製に用いた使用部材、及びアルミニウム合金の化学成分を、表1及び表2に示す。
For Examples 1 to 4, Tables 1 and 2 show the members used for manufacturing the joining members and the chemical components of the aluminum alloy.
(2)接合部材の評価
例1~例4で得られた接合部材について、その接合部断面を観察した。まず、湿式砥石切断機を使用して、接合部材を接合面に垂直な方向に切断したのち研磨を行い、接合部の観察用サンプルを作製した。このサンプル切断面を、光学顕微鏡を使用して観察した。 (2) Evaluation of joint members The cross sections of the joints of the joint members obtained in Examples 1 to 4 were observed. First, using a wet grindstone cutting machine, the joining member was cut in a direction perpendicular to the joining surface and then polished to prepare a sample for observing the joining portion. The cut surface of this sample was observed using an optical microscope.
例1~例4で得られた接合部材について、その接合部断面を観察した。まず、湿式砥石切断機を使用して、接合部材を接合面に垂直な方向に切断したのち研磨を行い、接合部の観察用サンプルを作製した。このサンプル切断面を、光学顕微鏡を使用して観察した。 (2) Evaluation of joint members The cross sections of the joints of the joint members obtained in Examples 1 to 4 were observed. First, using a wet grindstone cutting machine, the joining member was cut in a direction perpendicular to the joining surface and then polished to prepare a sample for observing the joining portion. The cut surface of this sample was observed using an optical microscope.
(3)評価結果
例1の接合部材断面の光学顕微鏡像を図28及び図29に示す。図28は接合部材全体を示し、図29は接合部の近傍を示す。同様にして、例2の接合部材断面の光学顕微鏡像を図30及び図31に示し、例3の接合部材断面の光学顕微鏡像を図32及び図33に示し、例4の接合部材断面の光学顕微鏡像を図34及び図35に示す。 (3) Evaluation Results Optical microscope images of the cross section of the joining member of Example 1 are shown in FIGS. 28 and 29. FIG. 28 shows the entire joint member, and FIG. 29 shows the vicinity of the joint portion. Similarly, the optical microscope image of the cross section of the joining member of Example 2 is shown in FIGS. 30 and 31, the optical microscope image of the cross section of the joining member of Example 3 is shown in FIGS. 32 and 33, and the optics of the cross section of the joining member of Example 4 is shown. Microscopic images are shown in FIGS. 34 and 35.
例1の接合部材断面の光学顕微鏡像を図28及び図29に示す。図28は接合部材全体を示し、図29は接合部の近傍を示す。同様にして、例2の接合部材断面の光学顕微鏡像を図30及び図31に示し、例3の接合部材断面の光学顕微鏡像を図32及び図33に示し、例4の接合部材断面の光学顕微鏡像を図34及び図35に示す。 (3) Evaluation Results Optical microscope images of the cross section of the joining member of Example 1 are shown in FIGS. 28 and 29. FIG. 28 shows the entire joint member, and FIG. 29 shows the vicinity of the joint portion. Similarly, the optical microscope image of the cross section of the joining member of Example 2 is shown in FIGS. 30 and 31, the optical microscope image of the cross section of the joining member of Example 3 is shown in FIGS. 32 and 33, and the optics of the cross section of the joining member of Example 4 is shown. Microscopic images are shown in FIGS. 34 and 35.
図28及び図29に示されるように、例1の接合部材は、その接合部に、芯材(A3003材)と皮材(A4343材)が溶融凝固した母材溶融部が形成されていた。この母材溶融部は、上板と下板の芯材を一体化するように強固に接合していた。また母材溶融部の周囲には、皮材(A4343)が溶融凝固したろう材溶融部が形成されていた。このろう材溶融部は母材溶融部をシールしていた。例2及び例3の接合部材についても、例1と同様の結果が得られ、接合部には、母材溶融部と、その周囲をシールするろう材溶融部が形成されていた。
As shown in FIGS. 28 and 29, in the joint member of Example 1, a base metal melted portion in which a core material (A3003 material) and a skin material (A4343 material) were melted and solidified was formed at the joint portion. This base metal melting portion was firmly joined so as to integrate the core material of the upper plate and the lower plate. Further, a brazing material melting portion in which the skin material (A4343) was melted and solidified was formed around the base metal melting portion. This brazing filler metal melted portion sealed the base metal melted portion. The same results as in Example 1 were obtained for the joining members of Examples 2 and 3, and the base metal melting portion and the brazing filler metal melting portion that seals the periphery thereof were formed in the joining portion.
一方で、ろう材及びフラックスを用いなかった例4の接合部材では、接合部には、金属部材が溶融凝固した母材溶融部類似の組織が観察されるものの、その周囲にはろう材溶融部が見られなかった。そのため、母材溶融部類似の組織はシールされておらず、大気に暴露されていた。
On the other hand, in the joint member of Example 4 in which the brazing filler metal and the flux were not used, a structure similar to that of the base metal melted portion in which the metal member was melted and solidified was observed in the joint portion, but the brazing filler metal melted portion was observed around the joint portion. Was not seen. Therefore, the structure similar to the melted part of the base metal was not sealed and was exposed to the atmosphere.
以上の結果から、本実施形態によれば、優れた接合強度を有するとともに、気密性及び水密性に優れた接合部材を得られることが理解される。
From the above results, it is understood that according to the present embodiment, a joining member having excellent joining strength and excellent airtightness and watertightness can be obtained.
10 接合部材
12 第1金属部材
14 第2金属部材
16 シート状ろう材
18 接合界面
20 レーザ溶接部
22 母材溶融部
24 ろう材溶融部
26 凝固割れ
28 レーザ光 10 Joiningmember 12 1st metal member 14 2nd metal member 16 Sheet-shaped brazing material 18 Joining interface 20 Laser welding part 22 Base metal melting part 24 Brazing material melting part 26 Solidification crack 28 Laser light
12 第1金属部材
14 第2金属部材
16 シート状ろう材
18 接合界面
20 レーザ溶接部
22 母材溶融部
24 ろう材溶融部
26 凝固割れ
28 レーザ光 10 Joining
Claims (8)
- 第1主面及び第2主面を有する第1金属部材と、前記第1金属部材の第2主面側に配置され、レーザ溶接部を介して前記第1金属部材の少なくとも一部と接合した第2金属部材と、を備える接合部材であって、
前記接合部材が、前記第1金属部材の第2主面側にシート状ろう材を備え、
前記レーザ溶接部が、前記第1金属部材、前記第2金属部材及び前記シート状ろう材の溶融一体化物で構成される母材溶融部と、前記シート状ろう材の溶融物で構成されるろう材溶融部と、を備え、
前記母材溶融部が、前記第1金属部材の第1主面から第2主面へと貫通し、かつ第2金属部材の厚さの少なくとも一部にまで連続して形成されており、
前記ろう材溶融部が、前記第1金属部材、前記第2金属部材及び前記母材溶融部と密着している、接合部材。 The first metal member having the first main surface and the second main surface was arranged on the second main surface side of the first metal member and joined to at least a part of the first metal member via a laser welded portion. A joining member comprising a second metal member.
The joining member includes a sheet-shaped brazing material on the second main surface side of the first metal member.
The laser welded portion will be composed of a base metal melt portion composed of a first metal member, a second metal member, and a melt-integrated material of the sheet-shaped brazing material, and a melt of the sheet-shaped brazing material. With a material melting part,
The base metal melting portion penetrates from the first main surface to the second main surface of the first metal member and is continuously formed up to at least a part of the thickness of the second metal member.
A joining member in which the brazing filler metal melted portion is in close contact with the first metal member, the second metal member, and the base metal melted portion. - 前記第1金属部材と前記第2金属部材とが重ね継手を形成して接合されている、請求項1に記載の接合部材。 The joining member according to claim 1, wherein the first metal member and the second metal member form a lap joint and are joined.
- 前記第1金属部材と前記第2金属部材とがT継手を形成して接合されている、請求項1に記載の接合部材。 The joining member according to claim 1, wherein the first metal member and the second metal member are joined by forming a T joint.
- 前記第1金属部材と前記第2金属部材とが同種材料からなる、請求項1~3のいずれか一項に記載の接合部材。 The joining member according to any one of claims 1 to 3, wherein the first metal member and the second metal member are made of the same material.
- 前記第1金属部材と前記第2金属部材とが異種材料からなる、請求項1~3のいずれか一項に記載の接合部材。 The joining member according to any one of claims 1 to 3, wherein the first metal member and the second metal member are made of different materials.
- 前記第1金属部材及び前記第2金属部材の一方又は両方がアルミニウム系金属からなる、請求項1~5のいずれか一項に記載の接合部材。 The joining member according to any one of claims 1 to 5, wherein one or both of the first metal member and the second metal member are made of an aluminum-based metal.
- 請求項1~6のいずれか一項に記載の接合部材の製造方法であって、以下の工程;
第1主面及び第2主面を有する第1金属部材、第2金属部材、及びシート状ろう材を準備する工程、
準備した前記第1金属部材の第2主面側に前記シート状ろう材及び前記第2金属部材がこの順に配置されてなる積層体を作製する工程、及び
前記積層体を構成する第1金属部材の第1主面にレーザ光を照射して、接合界面を介して前記第1金属部材の少なくとも一部に前記第2金属部材をレーザ溶接する工程、を備え、
前記レーザ溶接する工程で、前記第1金属部材、前記第2金属部材及び前記シート状ろう材の一部を溶融一体化させて、レーザ溶接部の接合界面を貫通する母材溶融部を形成するとともに、前記接合界面周囲のシート状ろう材を溶融させて、ろう材溶融部を形成する、方法。 The method for manufacturing a joining member according to any one of claims 1 to 6, wherein the following steps;
A step of preparing a first metal member having a first main surface and a second main surface, a second metal member, and a sheet-shaped brazing material.
A step of producing a laminated body in which the sheet-shaped brazing material and the second metal member are arranged in this order on the second main surface side of the prepared first metal member, and a first metal member constituting the laminated body. The first main surface thereof is irradiated with a laser beam, and the second metal member is laser-welded to at least a part of the first metal member through the bonding interface.
In the laser welding step, the first metal member, the second metal member, and a part of the sheet-shaped brazing material are melt-integrated to form a base metal melting portion penetrating the joining interface of the laser welding portion. At the same time, a method of melting a sheet-shaped brazing material around the bonding interface to form a brazing material melting portion. - 前記第1金属部材及び前記シート状ろう材として、第1金属部材及びシート状ろう材が圧延接合されてなるクラッド材を準備する、請求項7に記載の方法。 The method according to claim 7, wherein as the first metal member and the sheet-shaped brazing material, a clad material obtained by rolling and joining the first metal member and the sheet-shaped brazing material is prepared.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-195450 | 2020-11-25 | ||
JP2020195450A JP2022083869A (en) | 2020-11-25 | 2020-11-25 | Joining member and manufacturing method thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022113436A1 true WO2022113436A1 (en) | 2022-06-02 |
Family
ID=81754535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/029804 WO2022113436A1 (en) | 2020-11-25 | 2021-08-13 | Bonded member and method for manufacturing same |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2022083869A (en) |
WO (1) | WO2022113436A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010171279A (en) * | 2009-01-23 | 2010-08-05 | Toyota Motor Corp | Heat radiator |
WO2012098720A1 (en) * | 2011-01-20 | 2012-07-26 | トヨタ自動車株式会社 | Brazing method and brazed structure |
WO2013021266A2 (en) * | 2011-08-09 | 2013-02-14 | Toyota Jidosha Kabushiki Kaisha | Clad material for cooler, cooler for heat-generating device, and method of producing cooler for heat-generating device |
-
2020
- 2020-11-25 JP JP2020195450A patent/JP2022083869A/en active Pending
-
2021
- 2021-08-13 WO PCT/JP2021/029804 patent/WO2022113436A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010171279A (en) * | 2009-01-23 | 2010-08-05 | Toyota Motor Corp | Heat radiator |
WO2012098720A1 (en) * | 2011-01-20 | 2012-07-26 | トヨタ自動車株式会社 | Brazing method and brazed structure |
WO2013021266A2 (en) * | 2011-08-09 | 2013-02-14 | Toyota Jidosha Kabushiki Kaisha | Clad material for cooler, cooler for heat-generating device, and method of producing cooler for heat-generating device |
Also Published As
Publication number | Publication date |
---|---|
JP2022083869A (en) | 2022-06-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8093531B2 (en) | Method of energy beam welding aluminum to titanium | |
Katayama | Laser welding of aluminium alloys and dissimilar metals | |
JP4957093B2 (en) | Dissimilar metal joining method | |
JP5527635B2 (en) | Aluminum metal joining method | |
WO2012124255A1 (en) | Laser-bonded component and production method for same | |
KR102061471B1 (en) | Laser Brazing Method and Manufacturing Method of Lap Joint Member | |
WO2022113436A1 (en) | Bonded member and method for manufacturing same | |
JP5424005B2 (en) | Dissimilar metal joining method | |
JP4962752B2 (en) | Method of joining dissimilar metals with high energy beam | |
JP2007260701A (en) | Method for joining different kinds of materials | |
JP4066433B2 (en) | Method and apparatus for joining dissimilar materials by laser irradiation | |
JP6376221B2 (en) | Laser welded joint and manufacturing method thereof | |
CN104907657B (en) | A kind of TiAl/TC4 electron beam melt-brazing methods for adding alloy interlayer | |
JP6512382B1 (en) | Metal-bonded structure and method of manufacturing metal-bonded structure | |
JP4518892B2 (en) | Dissimilar material joining method | |
JP4566091B2 (en) | Dissimilar material joining method | |
JP4931506B2 (en) | Dissimilar material joining method | |
JP2013063458A (en) | Jointing method and jointing component | |
JP2017094382A (en) | Laser welding joint | |
JP2008264820A (en) | Structure and method for joining different kind metals | |
CN109014580B (en) | Lapping laser gap powder filling welding method with rolling assistance | |
WO2023223797A1 (en) | Plate material, joined body, plate material joining method, and plate material manufacturing method | |
JP4857869B2 (en) | Laser brazing method for lap fillet joints | |
WO2023167045A1 (en) | Sheet material, bonded body, method for bonding sheet material, and method for manufacturing sheet material | |
WO2024161777A1 (en) | Method for joining metallic materials and metal joined body |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21897415 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21897415 Country of ref document: EP Kind code of ref document: A1 |