CN104476011A - High-entropy alloy welding wire for welding titanium/low-carbon steel in TIG (Tungsten Inert Gas) mode and application - Google Patents
High-entropy alloy welding wire for welding titanium/low-carbon steel in TIG (Tungsten Inert Gas) mode and application Download PDFInfo
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- CN104476011A CN104476011A CN201410787157.3A CN201410787157A CN104476011A CN 104476011 A CN104476011 A CN 104476011A CN 201410787157 A CN201410787157 A CN 201410787157A CN 104476011 A CN104476011 A CN 104476011A
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- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
-
- 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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
- B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
- B23K2103/24—Ferrous alloys and titanium or alloys thereof
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a high-entropy alloy welding wire for welding titanium/low-carbon steel in a TIG (Tungsten Inert Gas) mode. The high-entropy alloy welding wire is formed by the following components in atomic percent with the total percent of 100 percent: 5 percent of Ti, 2 percent to 15 percent of Fe, 25 percent to 35 percent of Ni, 23 percent to 30 percent of Cu, and 25 percent to 35 percent of V. The invention also discloses a method for applying the high-entropy alloy welding wire to welding the titanium/ the low-carbon steel in the TIG mode. The welding material cost is low, the preparation is simple, the welding method is convenient and easy to implement, the adaptability is wide, and the obtained titanium/low-carbon steel welded joint is good in formation of weld, free of cracks, high in intensity and good in toughness.
Description
Technical field
The invention belongs to welding technology field, relate to a kind of high-entropy alloy welding wire welding titanium/mild steel for TIG, the invention still further relates to this high-entropy alloy welding wire of application implements TIG weldering method to titanium/mild steel.
Background technology
Titanium reserves are on earth very abundant, have the advantages such as specific strength is high, density is low, corrosion-resistant, are widely used in the fields such as aerospace, boats and ships, petrochemical industry, amusement and medical treatment.But because its metallurgical technology is complicated, expensive, limits titanium and apply on a large scale.The composite construction of titanium and mild steel, can give full play to bi-material in performance and complementary advantage economically, have wide practical use in various fields.
The key preparing titanium/mild steel composite structural member is the Welding Problems that will solve titanium and mild steel.Because the difference of physical and chemical performance adds in the difficulty of welding, particularly weld seam and easily forms a large amount of brittle intermetallic thing (TiFe, TiFe2, TiC etc.) between dissimilar metal, strength of joint is lower.At present, the main method of welding with mild steel for titanium is Pressure Welding (comprising diffusion welding (DW), friction welding (FW) and explosive welding (EW)), also possesses some special knowledge to titanium-mild steel soldering, but the titanium/steel high-intensity welding realized truly then surely belongs to melting.The molten solder of titanium/steel belongs to the welding between dissimilar metal, and its difficulty of construction is far longer than titanium/titanium, steel/steel homogeneous material, and brittle intermetallic thing causes joint performance not good especially serious.Raw for stopping brittle intermetallic produce from source, using suitable welding material to be the key of dealing with problems, is also the fundamental solution improving titanium/steel welded joint quality.
High-entropy alloy breaches the Design Mode of conventional alloys, by high entropic effect, makes the structure organization of alloy be tending towards single bcc or fcc solid solution, effectively can suppress the generation of intermetallic compound, for the high-performance welding realizing titanium/steel provides brand-new technical thought.
Summary of the invention
The object of this invention is to provide and a kind ofly weld the high-entropy alloy welding wire of titanium/mild steel for TIG, when solving the titanium existed in prior art melting welding direct with mild steel, easily form brittle intermetallic thing in weld seam and cause ftractureing, the problem that strength of joint is lower.
Another object of the present invention is to provide this high-entropy alloy welding wire of a kind of application implements TIG weldering method to titanium/mild steel.
The technical solution adopted in the present invention is, a kind of high-entropy alloy welding wire welding titanium/mild steel for TIG, be made up of by atomic percent following component, total percentage is 100%, wherein Ti content is fixed as 5%, Fe be 2%-15%, Ni is 25%-30%, Cu is 23%-30%, V is 25%-35%.
Another technical scheme that the present invention adopts is, this high-entropy alloy welding wire of a kind of application implements the method for TIG weldering to titanium/mild steel, implements according to following steps:
Step 1) bevel process is distinguished to the mother metal of titanium and mild steel;
Step 2) conscientiously clear up, groove of polishing, remove the greasy dirt on two kinds of mother metal surfaces and impurity;
Step 3) at titanium and mild steel lower surface, backing plate is installed, backing plate upper surface is horizontally arranged with Ar conductance chute, by fixed with backing plate while of titanium and mild steel, and the gap of titanium and mild steel is made to be positioned at directly over the Ar conductance chute center line of backing plate upper surface;
Step 4) two-sided logical Ar gas shielded is implemented to the groove position of titanium and mild steel, pass into argon gas 3-5s in advance before weldering;
Step 5) implement TIG weldering, in welding process, control electric arc and should slightly be partial to mild steel side, make the more even of both sides mother metal fusing;
Step 6) postwelding continues to pass into Ar gas 3-5s, then unclamps rapidly fixture and backing plate.
The invention has the beneficial effects as follows, this high-entropy alloy welding wire has excellent intensity, toughness and corrosion resisting property, not easily forms brittle intermetallic phase, is easy to obtain high performance titanium and Low Carbon Steel Welded Joints; Use the welding procedure of this high-entropy alloy welding wire simple, do not need in advance at titanium side deposition transition zone, without the need to frequently changing welding wire and conversion welding parameter in welding process, convenience and high-efficiency, high-entropy alloy composition range is wide in range, good to different trade mark base metals adaptability, is convenient to promote.
Accompanying drawing explanation
Fig. 1 is titanium and Low Carbon Steel Welded Joints form and bevel shape figure in the present invention;
Fig. 2 is the welding point assembling schematic diagram in the inventive method.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The high-entropy alloy welding wire welding titanium/mild steel for TIG of the present invention, be made up of by atomic percent following component, total percentage is 100%, wherein Ti content is fixed as 5%, Fe be 2%-15%, Ni is 25%-30%, Cu is 23%-30%, V is 25%-35%.
In high-entropy alloy component of weld wire of the present invention, reason is limited to each chemical element composition and content and is described below respectively:
In order to improve the comprehensive mechanical property of titanium/Low Carbon Steel Welded Joints, needing to obtain metal chemical composition and being in the pivot content range forming high-entropy alloy.For the composition characteristic of mother metal titanium to be welded and mild steel, welding wire selects Ti-Fe-Ni-Cu-V five pivot high-entropy alloy.Main cause has 3 points: 1. in welding process the fusing of mother metal and Jin Feng district mother metal inevitable to the dissolving in molten bath, brittle intermetallic thing is produced for preventing weld seam, Ti, Fe pivot must be contained in weld seam target component, and the content of these two kinds of elements in welding wire will lower than other pivot; Because the solvability of Ti element in weld seam is greater than Fe, so the content of Ti is lower in welding wire, the content of Fe is then relatively high.2. Ni element both can solid solution unlimited with Fe, can dissolve each other again with Cu, V.3. Cu segregation is in interdendritic, can improve joint plasticity, and V and Ti and Fe all can infinitely solid solution, can effectively suppress brittle intermetallic produce raw.Like this, the welding wire of application choice is through welding process, and the weld metal of formation is appointed and so belonged to high-entropy alloy scope, substantially eliminates brittle intermetallic thing, and the joint performance obtained is higher.
Welding wire composition is converted into mass percent by atomic percent.Corresponding high pure metal is taken according to the mass percent of contained element.The said components metal that weighing has been got well is put into ultravacuum electric arc furnaces and carry out molten joining, obtained foundry alloy.Applied metal is twisted flax fibers and woven technology, and by the foundry alloy refuse obtained, the rapid solidification through wheel of twisting flax fibers and weaving is prepared into high-entropy alloy gold solder silk.
The present invention applies this high-entropy alloy welding wire implements TIG weldering method to titanium/mild steel, implements according to following steps:
Step 1) bevel process is distinguished to the mother metal of titanium and mild steel, total opening angle of titanium embodiment illustrated in fig. 1 and mild steel weld groove is 60 °, and the bottom thickness of titanium mother metal groove is 1mm;
Step 2) conscientiously clear up, groove of polishing, remove greasy dirt and the impurity at two kinds of mother metal surfaces, especially groove position;
Step 3) assemble mother metal according to Fig. 2, at titanium and mild steel lower surface, backing plate is installed, backing plate upper surface is horizontally arranged with Ar conductance chute, by fixed with backing plate while of titanium and mild steel, gap between the mother metal of titanium-mild steel is 1mm, and makes the gap of titanium and mild steel be positioned at directly over the Ar conductance chute center line of backing plate upper surface;
Step 4) two-sided logical Ar gas shielded (Ar gas purity >99.9%) is implemented to the groove position of titanium and mild steel, namely in Ar conductance chute, Ar gas is led to below, lead to Ar gas at groove position of upper above, before weldering, pass into argon gas 3-5s in advance;
Step 5) implement TIG weldering, technological parameter is: carry out the pre-heat treatment to mild steel mother metal before weldering, temperature is 180 DEG C-210 DEG C; Ar throughput is 9-11L/min, and welding current is 65-80A, speed of welding 50-60mm/min; In addition, in welding process, control electric arc and should slightly be partial to mild steel side, make the more even of both sides mother metal fusing;
Step 6) postwelding continues to pass into Ar gas 3-5s, and namely upper/lower positions continues logical Ar gas in welded joints, stagnant protection after realizing, then unclamps rapidly fixture and backing plate, prevents weld seam from producing stress cracking.
Embodiment 1
Be 100% according to total atomic percent, according to each constituent content of data decimation that Ti is 5%, Fe is 7%, Ni is 28%, Cu is 25%, V is 35%, and prepare according to above-mentioned embodiment the Ti5Fe7Ni28Cu25V35 high-entropy alloy welding wire that diameter is 1.2mm.Application TIG weldering is welded with Q235 mild steel the TC4 titanium that 5mm is thick, and welding procedure is described above, and concrete welding condition is: before weldering, mother metal is preheating to 200 DEG C, Ar throughput 9L/min, welding current 80A, stagnant 4s after speed of welding 50mm/min, Ar gas.
Detect and find: the joint welding metal amalgamation obtained is good, fusion area flawless, seam organization presents gradient layer distribution from center to both sides mother metal melt run, and phase structure is made up of single fcc and bcc, and the tensile strength obtaining welding point is 170Mpa.
Embodiment 2
Be 100% according to total atomic percent, according to each constituent content of data decimation that Ti is 5%, Fe is 10%, Ni is 27%, Cu is 28%, V is 30%, and prepare according to above-mentioned embodiment the Ti5Fe10Ni27Cu28V30 high-entropy alloy welding wire that diameter is 1.4mm.Application TIG weldering is welded with R20 steel the TA2 titanium that 5mm is thick, and welding procedure is described above, and concrete welding condition is: mother metal is preheating to 200 DEG C, Ar throughput 10L/min, welding current 75A, stagnant 3s after speed of welding 55mm/min, Ar gas before weldering.
Detect and find: welding point is full, mother metal does not damage, weld metal fusion character is good, fusion area flawless, the equiax crystal being organized as densification near melt run, then grow to Weld pipe mill in dendrite mode, phase structure is made up of single fcc and bcc, and the tensile strength obtaining welding point is 200Mpa.
Embodiment 3
Be 100% according to total atomic percent, according to each constituent content of data decimation that Ti is 5%, Fe is 15%, Ni is 25%, Cu is 23%, V is 32%, and prepare according to above-mentioned embodiment the Ti5Fe15Ni25Cu23V32 high-entropy alloy welding wire that diameter is 1.2mm.Application TIG weldering is welded with 20 steel the TA2 titanium that 6mm is thick, and welding procedure is described above, and concrete welding condition is: mother metal is preheating to 190 DEG C, Ar throughput 11L/min, welding current 80A, stagnant 4s after speed of welding 55mm/min, Ar gas before weldering.
Detect and find: gained joint welding metal amalgamation is good, fusion area flawless, and seam organization is equiax crystal and the dendrite of even compact substantially, and phase structure is made up of single fcc and bcc, the tensile strength obtaining welding point is 185Mpa.
Embodiment 4
Be 100% according to total atomic percent, according to each constituent content of data decimation that Ti is 5%, Fe is 2%, Ni is 30%, Cu is 28%, V is 35%, and prepare according to above-mentioned embodiment the Ti5Fe2Ni30Cu28V35 high-entropy alloy welding wire that diameter is 1.2mm.Application TIG weldering is welded with Q285B steel the TA2 titanium that 6mm is thick, and welding procedure is described above, and concrete welding condition is: before weldering, mother metal is preheating to 200 DEG C, Ar throughput 11L/min, welding current 70A, stagnant 4s after speed of welding 54mm/min, Ar gas.
Detect and find: joint welding surface pore-free and being mingled with, weld metal amalgamation is good, fusion area flawless, and seam organization presents gradient layer distribution from center to both sides mother metal melt run, phase structure is made up of single fcc and bcc, and the tensile strength obtaining welding point is 160Mpa.
Embodiment 5
Be 100% according to total atomic percent, according to each constituent content of data decimation that Ti is 5%, Fe is 9%, Ni is 28%, Cu is 30%, V is 28%, and prepare according to above-mentioned embodiment the Ti5Fe9Ni28Cu30V28 high-entropy alloy welding wire that diameter is 1.2mm.Application TIG weldering is welded with A3 steel the TB5 titanium that 6mm is thick, and welding procedure is described above, and concrete welding condition is: mother metal is preheating to 210 DEG C, Ar throughput 10L/min, welding current 75A, stagnant 4s after speed of welding 60mm/min, Ar gas before weldering.
Detect and find: weld metal amalgamation is good, fusion area flawless, seam organization presents gradient layer distribution from center to both sides mother metal melt run, generates without obvious intermetallic compound, phase structure is made up of single fcc and bcc, and the tensile strength obtaining welding point is 182Mpa.
In sum, high-entropy alloy of the present invention, application vacuum arc melting makes, and proportioning is wide in range, and the high-entropy alloy component of weld wire that rapid solidification obtains is even, and be applied in welding process in TIG weldering simple, the seam properties of postwelding meets the requirements.
Claims (4)
1. weld a high-entropy alloy welding wire for titanium/mild steel for TIG, its feature is: be made up of by atomic percent following component, and total percentage is 100%, wherein Ti content is fixed as 5%, Fe be 2%-15%, Ni is 25%-30%, Cu is 23%-30%, V is 25%-35%.
2. application rights requires that the high-entropy alloy welding wire described in 1 implements a method for TIG weldering to titanium/mild steel, and its feature is, implements according to following steps:
Step 1) bevel process is distinguished to the mother metal of titanium and mild steel;
Step 2) conscientiously clear up, groove of polishing, remove the greasy dirt on two kinds of mother metal surfaces and impurity;
Step 3) at titanium and mild steel lower surface, backing plate is installed, backing plate upper surface is horizontally arranged with Ar conductance chute, by fixed with backing plate while of titanium and mild steel, and the gap of titanium and mild steel is made to be positioned at directly over the Ar conductance chute center line of backing plate upper surface;
Step 4) two-sided logical Ar gas shielded is implemented to the groove position of titanium and mild steel, pass into argon gas 3-5s in advance before weldering;
Step 5) implement TIG weldering, in welding process, control electric arc and should slightly be partial to mild steel side, make the more even of both sides mother metal fusing;
Step 6) postwelding continues to pass into Ar gas 3-5s, then unclamps rapidly fixture and backing plate.
3. high-entropy alloy welding wire according to claim 2 implements the method for TIG weldering to titanium/mild steel, and its feature is, described step 1) in, total opening angle of titanium and mild steel weld groove is 60 °.
4. high-entropy alloy welding wire according to claim 2 implements the method for TIG weldering to titanium/mild steel, its feature is, described step 5) in, technological parameter is: before weldering, mother metal is preheating to 190-210 DEG C, welding current is 65-80A, speed of welding 50-60mm/min.
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Cited By (7)
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| CN111085752A (en) * | 2018-10-24 | 2020-05-01 | 叶均蔚 | Welding method using alloy powder as welding filler |
| US10640854B2 (en) | 2016-08-04 | 2020-05-05 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11318566B2 (en) | 2016-08-04 | 2022-05-03 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11339817B2 (en) | 2016-08-04 | 2022-05-24 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11511375B2 (en) | 2020-02-24 | 2022-11-29 | Honda Motor Co., Ltd. | Multi component solid solution high-entropy alloys |
| CN115679179A (en) * | 2022-11-04 | 2023-02-03 | 中国石油大学(华东) | High-entropy alloy and application thereof in titanium/steel composite plate welding |
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| US10640854B2 (en) | 2016-08-04 | 2020-05-05 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11318566B2 (en) | 2016-08-04 | 2022-05-03 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11339817B2 (en) | 2016-08-04 | 2022-05-24 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| US11535913B2 (en) | 2016-08-04 | 2022-12-27 | Honda Motor Co., Ltd. | Multi-material component and methods of making thereof |
| CN111085752A (en) * | 2018-10-24 | 2020-05-01 | 叶均蔚 | Welding method using alloy powder as welding filler |
| CN110936680A (en) * | 2019-12-17 | 2020-03-31 | 南京工业大学 | Intermediate alloy for titanium/carbon steel bimetal compounding and compounding process |
| US11511375B2 (en) | 2020-02-24 | 2022-11-29 | Honda Motor Co., Ltd. | Multi component solid solution high-entropy alloys |
| CN115679179A (en) * | 2022-11-04 | 2023-02-03 | 中国石油大学(华东) | High-entropy alloy and application thereof in titanium/steel composite plate welding |
| CN115679179B (en) * | 2022-11-04 | 2023-09-26 | 中国石油大学(华东) | High-entropy alloy and application thereof in welding of titanium/steel composite plates |
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