CN107848082A - Flux-cored wire for gas-shielded arc welding - Google Patents

Flux-cored wire for gas-shielded arc welding Download PDF

Info

Publication number
CN107848082A
CN107848082A CN201680041319.6A CN201680041319A CN107848082A CN 107848082 A CN107848082 A CN 107848082A CN 201680041319 A CN201680041319 A CN 201680041319A CN 107848082 A CN107848082 A CN 107848082A
Authority
CN
China
Prior art keywords
mass
welding
content
metal
flux
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201680041319.6A
Other languages
Chinese (zh)
Other versions
CN107848082B (en
Inventor
山上雅史
永见正行
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Publication of CN107848082A publication Critical patent/CN107848082A/en
Application granted granted Critical
Publication of CN107848082B publication Critical patent/CN107848082B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B23K35/0266—Rods, electrodes, wires flux-cored
    • 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
    • B23K35/24—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
    • B23K35/3053—Fe as the principal constituent
    • 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
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

A kind of flux-cored wire for gas-shielded arc welding filled with solder flux intracutaneous outside steel, it is specified that amount contains BaF in welding wire gross mass2, C, Si, Mn, Al, Mg, Ni, Zr, Fe, Li, BaF2Content/(Al content+Zr content) value be more than 2.1 and less than 20.0.

Description

Flux-cored wire for gas-shielded arc welding
Technical field
The present invention relates to flux-cored wire for gas-shielded arc welding.In more detail, be relate to be applied to stand to The flux-cored wire for gas-shielded arc welding of full posture welding headed by posture.
Background technology
In marine structure field and line pipe field, the flood in-depth in the marine site of Energy Resources Exploitation, North facing are carried out The expansion of the resource exploration acceptance region in the limit marine site in ice ocean etc. and the maximization of equipment are carried out.With such skill Art trend is background, and in the design of marine structure and line pipe, high intensity and high tenacityization promote, Welded Joints Performance requirement also becomes stricter.
On the other hand, on welding material, from the viewpoint of high efficiency, it is desirable to welded for the medicine core of full posture welding Silk.In addition, also there is the requirement of high-fracture toughness for resulting welding metal.
But on the flux-cored wire of existing full posture welding, because the oxygen amount in resulting welding metal is high, So when carrying out gas shielded arc welding with it, it is difficult to ensure the low-temperature flexibility of welded-joint.
Thus, for example, in patent document 1, disclose one kind posture can carry out efficient welding, and toughness entirely Excellent flux-cored wire.
【Prior art literature】
【Patent document】
【Patent document 1】The clear 62-166098 publications of Japanese Laid-Open
But in the technology disclosed in patent document 1, the not high (table of patent document 1 of rank of the intensity of welding metal 2) performance required by the structural wood in marine structure field and line pipe field, at present, is hardly fully met.In addition, In patent document 1, the temperature of the evaluation of impact property (toughness) is high (table 2 of patent document 1), as disclosed in patent document 1 The welding metal that technology obtains can not be judged as excellent in low temperature toughness.
Moreover, flux-cored wire does not require nothing more than welding operability, and it is anti-thread breakage excellent to also need to 0.2% yield strength, heat resistanceheat resistant It is different, and the few welding metal of diffusivity hydrogen amount can be obtained.
The content of the invention
Therefore, its of the invention problem is, there is provided a kind of flux-cored wire for gas-shielded arc welding, it is to stand to posture Headed by full posture welding in welding operability it is excellent, in addition, low-temperature flexibility, 0.2% yield strength, tensile strength, heat resistanceheat resistant It is anti-thread breakage excellent, and the few welding metal of diffusivity hydrogen amount can be obtained.
In order to solve foregoing problem, in the present invention, it is proposed that following technological means.
The flux-cored wire for gas-shielded arc welding of the present invention, it is the intracutaneous gas shield electricity filled with solder flux outside steel Arc-welding flux-cored wire, in welding wire gross mass, contain BaF2：More than 2.0 mass % and below 11.1 mass %, C：0.01 matter Measure more than % and below 0.10 mass %, Si：More than 0.10 mass % and below 1.50 mass %, Mn：More than 0.70 mass % And 3.50 below mass %, Al：0.45 mass % is less than 2.00 mass %, Mg：More than 0.10 mass % and 2.00 matter Measure below %, Ni：More than 0.50 mass % and below 12.00 mass %, Zr：More than 0.01 mass % and 1.00 mass % with Under, Fe：More than 70.0 mass % and below 90.0 mass %, Li：It is more than 0.01 mass % and below 1.00 mass %, described BaF2Content/(content of the Al+Zr content) value be more than 2.1 and less than 20.0.
According to the flux-cored wire, because the content of predetermined component is in prescribed limit, and BaF2Content/(Al content+ Zr content) value in prescribed limit, so by stand to headed by posture full posture welding in welding operability it is excellent, this Outside, the low-temperature flexibility of welding metal, 0.2% yield strength, tensile strength and heat resistanceheat resistant are anti-thread breakage excellent, and can be spread The property few welding metal of hydrogen amount.
On the flux-cored wire for gas-shielded arc welding of the present invention, in the welding wire gross mass, can also contain CaF2：Below 2.0 mass %.
According to this flux-cored wire, due to CaF2Content below setting, so can turn into make welding operability Improve the certain welding wire of effect.
On the flux-cored wire for gas-shielded arc welding of the present invention, in the welding wire gross mass, gold can also be contained Belong to oxide：Below 0.29 mass %.
According to this flux-cored wire, because the content of metal oxide is below setting, so can turn into makes welding golden The certain welding wire of the low-temperature flexibility that belongs to excellent.
On the flux-cored wire for gas-shielded arc welding of the present invention, in the welding wire gross mass, gold can also be contained Belong to carbonate：Below 10.0 mass %.
According to this flux-cored wire, because the content of metal carbonate is below setting, so can turn into makes welding golden The certain welding wire of the low-temperature flexibility that belongs to excellent.
On the flux-cored wire for gas-shielded arc welding of the present invention, in the welding wire gross mass, Cr can also be contained： Below 1.00 mass % and Mo：At least one party among below 1.00 mass %.
According to this flux-cored wire, because Cr, Mo content are below setting, so can turn into makes welding metal excellent The certain welding wire of intensity.
On the flux-cored wire for gas-shielded arc welding of the present invention, in the welding wire gross mass, can also contain NaF：Below 1.00 mass %.
According to this flux-cored wire, because NaF content is below setting, so can turn into makes carrying for welding operability The certain welding wire of high effect.
On the flux-cored wire for gas-shielded arc welding of the present invention, in the welding wire gross mass, Ca can also be contained： Below 1.00 mass %.
According to this flux-cored wire, because Ca content is below setting, so can turn into makes carrying for welding operability The certain welding wire of high effect.
The flux-cored wire for gas-shielded arc welding of the present invention, in the welding wire gross mass, can also contain Ce and La： Total below 0.300 mass %.
According to this flux-cored wire, because Ce and La total content is below setting, so can turn into makes welding The certain welding wire of the excellent low-temperature flexibility of metal.
On the flux-cored wire for gas-shielded arc welding of the present invention, to stand into the full posture welding headed by posture Welding operability is excellent, in addition, low-temperature flexibility, 0.2% yield strength, tensile strength, heat resistanceheat resistant are anti-thread breakage excellent, and be able to can obtain The welding metal few to diffusivity hydrogen amount.
Embodiment
Hereinafter, the mode for implementing the present invention is illustrated in detail.
The flux-cored wire for gas-shielded arc welding (following, to be suitably referred to as " welding wire " or " flux-cored wire ") of present embodiment It is the welding wire used in gas shielded arc welding, is the intracutaneous welding wire filled with solder flux outside steel.
In detail, the welding wire of present embodiment, by tubular steel crust, and it is filled in the inner side of the steel crust Solder flux form.Further, welding wire is the jointless seamless type on steel crust, or the jointed seam type on steel crust Any form can.In addition, welding wire can implement plating etc. to surface (outside of steel crust), can also be unreal Apply.
Further, the string diameter (diameter) of the welding wire of present embodiment is not particularly limited, 1.2~2.4mm.In addition, weldering The solder flux filling rate of silk is also not particularly limited, but from the viewpoint of the operability (giving property etc.) when stringiness and the welding of welding wire Set out, be 12~25 mass % of welding wire gross mass.
Moreover, the welding wire on present embodiment, specific each composition relative to welding wire gross mass (=steel crust quality+ Flux quality) content and defined composition content ratio.
Hereinafter, for specific present embodiment welding wire each composition content the reasons why illustrate.
[BaF2：More than 2.0 mass % and below 11.1 mass %]
BaF2The effect for the deoxidier for being used as strength is played, and the welding operability for welding full posture with playing is excellent The effect of different slag former.But if BaF2Content be less than 2.0 mass %, then standing can not ensure to weld into the welding of posture Road shape, and because the rising of the oxygen amount in welding metal causes toughness to deteriorate.On the other hand, if BaF2Content be higher than 11.1 mass %, then because moisture absorption, the diffusivity hydrogen amount of welding metal can rise.
Therefore, BaF2Content be more than 2.0 mass % and below 11.1 mass % in welding wire gross mass.
Further, from the viewpoint of the effect is further improved, BaF2Content be preferably more than 5.1 mass %, more Preferably more than 6.0 mass %.In addition, BaF2Content, from suppress diffusivity hydrogen amount rising from the viewpoint of, be preferably Below 10.0 mass %, more preferably below 9.0 mass %.
[C：More than 0.01 mass % and below 0.10 mass %]
C plays the effect for improving the intensity of welding metal.But if C content is less than 0.01 mass %, weld The yield strength and tensile strength of metal are insufficient.On the other hand, if C content is higher than 0.10 mass %, in welding metal Martensite generates in island, toughness deterioration.Moreover, the intensity of welding metal is superfluous, crackle easily occurs.
Therefore, C content is more than 0.01 mass % and below 0.10 mass % in welding wire gross mass.
Further, from the viewpoint of the deterioration for suppressing toughness and from the viewpoint of crackle generation is suppressed, C content Preferably below 0.08 mass %.
[Si：More than 0.10 mass % and below 1.50 mass %]
Si plays the effect for promoting welding metal deoxidation.But if Si content is less than 0.10 mass %, deoxidation effect Fruit is lost, and stomata occurs for welding metal.On the other hand, if Si content is higher than 1.50 mass %, the viscosity change of welding metal Height, the fusion to mother metal are deteriorated.Moreover, oxide system field trash is formed in welding metal, toughness deterioration.
Therefore, Si content, it is more than 0.10 mass % and below 1.50 mass % in welding wire gross mass.
Further, from the viewpoint of welding operability reduction (suppressing the fusion to mother metal to be deteriorated) is suppressed, Si content is excellent Elect as below 1.20 mass %.
[Mn：More than 0.70 mass % and below 3.50 mass %]
Mn promotes the deoxidation of welding metal, and plays the effect for the toughness for improving welding metal.But if Mn's contains Amount is less than 0.70 mass %, then deoxidation effect deficiency, and stomata occurs for welding metal, and toughness deteriorates.On the other hand, if Mn Content is higher than 3.50 mass %, then the intensity of welding metal is superfluous, and crackle easily occurs, and toughness deteriorates.
Therefore, Mn content is more than 0.70 mass % and below 3.50 mass % in welding wire gross mass.
Further, from the viewpoint of the viewpoint and suppression toughness deterioration for suppressing crackle generation, Mn content is preferably Below 2.50 mass %.
[Al：0.45 mass % is less than 2.00 mass %]
Al plays the effect for being used as deoxidier, and adjusts the melting BaF of the principal component as welding slag2Viscosity, hair Wave the effect that weld bead shape is arranged in the welding to posture is stood.But if Al content is less than 0.45 mass %, melt The viscosity of slag reduces, and the sagging of welding metal occurs in the welding to posture is stood.Moreover, the Al in solidification welding slag2O3Mutually reduce And causing welding slag to be easily broken, welding slag fissility deteriorates.On the other hand, if Al content is more than 2.00 mass %, weld Thick oxide system field trash, toughness deterioration are formed in metal.
Therefore, Al content is 0.45 mass % in welding wire gross mass less than 2.00 mass %.
Further, from the viewpoint of welding operability reduction is suppressed, Al content is preferably more than 0.70 mass %.Separately Outside, from the viewpoint of toughness deterioration is suppressed, Al content is preferably below 1.80 mass %.
[Mg：More than 0.10 mass % and below 2.00 mass %]
Mg plays the effect for the deoxidation for promoting welding metal.But if Mg content is less than 0.10 mass %, deoxidation Not sufficiently effective, stomata, toughness deterioration occur for welding metal.On the other hand, if Mg content is higher than 2.00 mass %, liquid slag Setting temperature decline, welding in the welding to posture is stood operability reduces.
Therefore, Mg content is more than 0.10 mass % and below 2.00 mass % in welding wire gross mass.
Further, from the viewpoint of toughness deterioration is suppressed, Mg content is preferably more than 0.50 mass %.In addition, from suppression From the viewpoint of system welding operability reduces, Mg content is preferably below 1.70 mass %.
[Ni：More than 0.50 mass % and below 12.00 mass %]
Ni plays the effect for improving the toughness of welding metal.But if Ni content is less than 0.50 mass %, weld The toughness for connecing metal is insufficient.On the other hand, if Ni content is higher than 12.00 mass %, the fire check of welding metal occurs Possibility it is high.
Therefore, Ni content is more than 0.50 mass % and below 12.00 mass % in welding wire gross mass.
Further, from the viewpoint of toughness deterioration is suppressed, Ni content is preferably more than 1.00 mass %, more preferably More than 2.00 mass %.In addition, from suppressing from the viewpoint of fire check occurs, Ni content is preferably below 9.00 mass %, More preferably below 5.00 mass %.
[Zr：More than 0.01 mass % and below 1.00 mass %]
Zr plays the effect for being used as deoxidier, and adjusts the melting BaF of the principal component as welding slag2Viscosity, hair Wave the effect that weld bead shape is arranged in the welding to posture is stood.But if Zr content is less than 0.01 mass %, melt The viscosity of slag reduces, and the sagging of welding metal occurs in the welding to posture is stood.On the other hand, if Zr content is higher than 1.00 Quality %, then melt in welding metal, due to solution strengthening cause the yield strength of molten metal, tensile strength it is notable on Rise.As a result, deteriorate the toughness of welding metal.
Therefore, Zr content, it is more than 0.01 mass % and below 1.00 mass % in welding wire gross mass.
Further, from suppressing to weld from the viewpoint of operability reduces, Zr content is preferably more than 0.05 mass %, more excellent Elect as more than 0.10 mass %.In addition, from the viewpoint of toughness deterioration is suppressed, Zr content be preferably 0.90 mass % with Under, more preferably below 0.80 mass %.
[Fe：Below the mass % of more than 70.0 mass % 90.0]
Fe is the main component of welding wire.So, if Fe content is less than 70.0 mass %, deposition amount deficiency.The opposing party Face, if Fe content is higher than 90.0 mass %, welding slag relative quantity deficiency, caused by deoxidation deficiency the deterioration of toughness and with stand to Weld bead shape turns into convex when posture is welded.
Therefore, Fe content, it is more than 70.0 mass % and below 90.0 mass % in welding wire gross mass.
[Li：More than 0.01 mass % and below 1.00 mass %]
Li plays the effect for improving the toughness of welding metal.But if Li content is less than 0.01 mass %, recruit Cause Al, Zr surplus to residue in welding metal, the yield strength of welding metal, tensile strength is significantly increased.As a result, make The toughness deterioration of welding metal.On the other hand, if Li content is higher than 1.00 mass %, electric arc is unstable, sends out incomplete fusion It is raw.
Therefore, Li content is more than 0.01 mass % and below 1.00 mass % in welding wire gross mass.
Further, from the viewpoint of incomplete fusion generation is suppressed, Li content is preferably below 0.80 mass %, more preferably Below 0.50 mass %.
[BaF2Content/(Al content+Zr content)：More than 2.1 and less than 20.0]
The welding wire of present embodiment, it is characterised in that make BaF2Content for Al and Zr total content ratio (=BaF2Content/(Al content+Zr content) value) in defined scope.
As described, BaF2The effect for the deoxidier for being used as strength is played, and play conduct to make in full posture welding The excellent slag former of welding operability effect, Al and Zr also play the effect for being used as deoxidier, and adjust as weldering The melting BaF of the principal component of slag2Viscosity, play in the welding to posture is stood arrange weld bead shape effect.
Also, by making the ratio of its content be defined scope, in the welding to posture is stood, just give play to welding bead Adjusting Shape to preferred condition effect.But if the ratio is less than 2.1, the volume of liquid slag is few, is standing the weldering to posture Weld bead shape is cannot ensure in connecing.In addition, the oxygen amount of welding metal rises, toughness deterioration.On the other hand, if the ratio is higher than 20.0, then as welding slag principal component melting BaF2Viscosity reduce, in the welding to posture is stood weld bead shape turn into it is convex Shape.Moreover, the volume of welding slag is superfluous, make slag inclusion.
Therefore, BaF2Content/(Al content+Zr content) value be more than 2.1 and less than 20.0.
Further, from the viewpoint of preventing that toughness from deteriorating, the ratio is preferably more than 6.0, and more preferably more than 7.0.Separately Outside, from the viewpoint of welding operability reduction is suppressed, the ratio is preferably less than 15.0, and more preferably less than 10.0.
So far, it is illustrated for the essential component of the welding wire of present embodiment, below, for should in welding wire Suppress the composition contained, it is desirable to any condition that when obtaining further effect welding wire can also contain, and inevitably Impurity illustrates.
[CaF2：2.0 below quality %]
CaF2Be suppress in welding wire containing composition, preferably CaF2The low method of content (can also be 0 matter Measure %).If moreover, CaF2Content be higher than 2.0 mass %, then make the viscosity of liquid slag reduce, standing the welding to posture becomes It is difficult.
Therefore, CaF2Contain in welding wire sometimes, CaF2Content be below 2.0 mass % in welding wire gross mass.
[metal oxide：Below 0.29 mass %]
Metal oxide be should suppress in welding wire containing composition, the low aspect of the content of preferably metal oxide ( Can be 0 mass %).Moreover, if the content of metal oxide is higher than 0.29 mass %, the metal oxide is in molten metal Interior residual is scattered, the low-temperature flexibility deterioration of welding metal.
Therefore, for metal oxide containing sometimes in welding wire, the content of metal oxide is 0.29 matter in welding wire gross mass Measure below %.
Further, so-called metal oxide, it is Al in detail2O3、Fe2O3、SiO2、TiO2One or more of, it is so-called The content of metal oxide, it is exactly total content of cited each composition.
[metal carbonate：Below 10.0 mass %]
Metal carbonate, is the composition that suppress to contain in welding wire, the low aspect of the content of preferably metal carbonate (can also be 0 mass %).Moreover, if the content of metal carbonate is higher than 10.0 mass %, cause the oxygen in welding metal The rising of amount, low-temperature flexibility deterioration.Excess gas is additionally, since, causes the stability of electric arc to reduce, turns into incomplete fusion hair The reason for raw.
Therefore, metal carbonate contains sometimes in welding wire, the content of metal carbonate, is 10.0 matter in welding wire gross mass Measure below %.
Further, so-called metal carbonate, it is exactly CaCO in detail3、BaCO3Among more than one, so-called metal carbonate The content of salt, it is exactly total content of cited each composition.
[Cr：Below 1.00 mass %, Mo：Below 1.00 mass %]
Which is all not essential composition by Cr, Mo, but is contained by least one in welding wire, and thus can play makes weldering Connect the effect that the tensile strength of metal improves.But if Cr content is higher than 1.00 mass %, or Mo content is higher than 1.00 During quality %, then the intensity of welding metal is superfluous, and the possibility that crackle occurs uprises.Moreover, the toughness deterioration of welding metal.
Therefore, Cr, Mo contain Cr containing sometimes in welding wire：Below 1.00 mass % and Mo：Among below 1.00 mass % At least one.
Further, from the viewpoint of suppressing the superfluous viewpoint of tensile strength, suppressing toughness deterioration, Cr, Mo content difference Preferably below 0.30 mass %.In addition, from the viewpoint of the effect is further improved, Cr, Mo content difference are preferred For more than 0.01 mass %, more preferably more than 0.05 mass %.
[NaF：Below 1.00 mass %]
NaF is not essential composition, but by being allowed in welding wire containing the effect that welding operability improves of sening as an envoy to can be played Fruit.But if NaF content is higher than 1.00 mass %, due to moisture absorption, the diffusivity hydrogen amount of welding metal is caused to rise.
Therefore, for NaF containing sometimes in welding wire, NaF content is below 1.00 mass %.
Further, from the viewpoint of the effect is further improved, NaF content is preferably more than 0.01 mass %, more Preferably more than 0.05 mass %.
[Ca：Below 1.00 mass %]
Ca is not essential composition, but by being allowed in welding wire containing the effect that welding operability improves of sening as an envoy to can be played Fruit.But if Ca content is higher than 1.00 mass %, adds liquid slag as oxidation Ca, reduce the viscosity of welding slag, stand to The sagging of molten metal occurs in the welding of posture.
Therefore, for Ca containing sometimes in welding wire, Ca content is below 1.00 mass %.
Further, from the viewpoint of the effect is further improved, Ca content is preferably more than 0.01 mass %, more excellent Elect as more than 0.05 mass %.
[Ce and La：Total below 0.300 mass %]
Ce, La are not necessary composition, but by being allowed to contain in welding wire, then play the effect for improving toughness Fruit.But if Ce and La total content is higher than 0.300 mass %, these compositions aoxidize and cause water adsorption, suppress The rising of the diffusivity hydrogen amount of welding metal, and low-temperature flexibility reduces.
Therefore, containing sometimes in welding wire, Ce and La total content are below 0.300 mass % by Ce, La.
Further, from the viewpoint of the rising for suppressing diffusivity hydrogen amount, Ce and La total content are preferably 0.100 matter Measure below %.In addition, from the viewpoint of the further raising of the effect is made, Ce and La total content are preferably 0.010 More than quality %.
[surplus：Inevitable impurity]
The surplus of the composition composition of the welding wire of present embodiment, is inevitable impurity.Moreover, as inevitable Impurity, P, S, Nb, V, Sb, Bi, B etc. can contain in the range of the effect without prejudice to the present invention.In detail, P：0.030 Below quality %, S：Below 0.030 mass %, Nb：Below 0.30 mass %, V：Below 0.30 mass %, Sb：0.030 matter Measure below %, Bi：Below 0.0050 mass %, B：Below 0.0050 mass %.
If in addition, surplus without prejudice to the present invention effect scope, Ti, Cu, Nb, V, Bi, B etc. can also be made Alloying constituent and its compound, and arc stabilizer and slag formation agent contain.Further, described metal oxide, metal carbon When each composition beyond hydrochlorate is added as oxide and nitride, in the surplus of the welding wire of present embodiment, wrap certainly Containing O, also comprising N.
Further, as inevitable impurity, P, S, Nb, V, Sb, Bi, B on illustration etc., if being no more than the rule Fixed content, then inevitable impurity is served not only as containing sometimes, in the case of positive addition, will not also hinder this The effect of invention.
In addition, the CaF on only providing the higher limit2, metal oxide, metal carbonate, Cr, Mo, NaF, Ca, It Ce, La, can energetically add, but can also be included as inevitable impurity.
Further, although the description of present embodiment welding wire composition, but on Al content, not comprising from Al2O3's Al, on Fe content, not comprising from Fe2O3Fe, on Si content, not comprising from SiO2Si, on containing for C Amount, not comprising the C from metal carbonate, on Ca content, not comprising from CaCO3、CaF2Ca.
Next, the manufacture method of the welding wire of explanation present embodiment.
[manufacture method of welding wire]
As the manufacture method of the welding wire of present embodiment, it is not particularly limited, for example, can be by method as shown below Manufacture.
First, the steel band of composition of preparation steel crust, an edge longitudinally give the steel band while being shaped by forming rolls, As the open pipe of U-shaped.Secondly, each composition is concocted in a manner of chemical composition as defined in reaching, the solder flux that will have so concocted It is filled into steel crust, thereafter, being processed makes section for circle.Thereafter, by cold working progress wire drawing, such as The flux-cored wire of 1.2~2.4mm string diameter.Also it is possible to implement annealing in cold working way.In addition, which kind of following structure Welding wire can use, i.e. the seamless welding wire that the seam of the steel crust shaped during for manufacture is welded, The welding wire in gap is remained with as former state with not welded to the seam.
【Embodiment】
Hereinafter, examples and comparative examples of the present invention are enumerated, are specifically illustrated for the effect of the present invention.
In the present embodiment, according to the manufacture method, it is being made up of composition in the carbon steel shown in table 1 below in scope Filling flux in the crust of the tubulose of formation, make the flux-cored wire (diameter 1.6mm) of embodiment and comparative example.Further, it is following The surplus of crust composition shown in table 1, it is Fe and inevitable impurity.At this moment, the filling rate of solder flux is made in welding wire gross mass In, the scope in 17.0~22.0 mass %.
【Table 1】
In table 2 below~4, the overall composition composition of the welding wire of embodiment and comparative example is shown.Further, the institute of table 2 below~4 The surplus of the component of weld wire shown is inevitable impurity.
In addition, " the BaF of table 2~42/ (Al+Zr) ", means " BaF2Content/(Al content+Zr content) ".And And table 2~4 " Ce or La " are meant " Ce and La total content ".
In addition, in table 2~4, for being unsatisfactory for the scope of the present invention, logarithm value is drawn underscore and represented.
【Table 2】
【Table 3】
【Table 4】
Next, using embodiment and each flux-cored wire of comparative example, for the mother metal shown in table 5 below, gas is carried out Shielded arc welding.Further, the surplus of the mother metal composition shown in table 5 below is Fe and inevitable impurity.
【Table 5】
In addition, welding condition is as follows.
Protective gas：100 volume %CO2, 25 liters/min
Gage of wire：φ1.6mm
Bevel shape：20°
Root interval：16mm
Welding current：260A
Arc voltage：26V
Weld posture：Downwards
Speed of welding：250mm/ minutes
Weld heat input：1.8kJ/mm
Weld length：400mm
Preheating temperature：100~110 DEG C
Interlayer temperature：140~160 DEG C
Polarity：Direct current electrode negative (DCEN)
Then, the weldering obtained for the gas shielded arc welding by using embodiment and each flux-cored wire of comparative example Metal is connect, by method as shown below, evaluates property (low-temperature flexibility, 0.2% yield strength, tensile strength), the diffusion of machinery Property hydrogen amount, heat resistanceheat resistant are anti-thread breakage, the generation of incomplete fusion and stomata.
The property ＞ of ＜ machineries
The mechanical property of welding metal, by according to JIS Z 3111：2005 defineds " stretching of deposited metal and The tension test of impact test method " and impact test are evaluated.In its result, on low-temperature flexibility, -80 DEG C of impact It is qualified to be worth (CVN-80) in more than 100J.In addition, 0.2% yield strength (0.2%PS) is conjunction in more than 690MPa Lattice.In addition, tensile strength (TS), is qualified in more than 770MPa and below 930MPa scope.
＜ diffusivity hydrogen amount ＞
The evaluation of the diffusivity hydrogen amount of welding metal, by according to JIS Z 3118：2007 method is carried out.
In its result, diffusivity hydrogen amount ([H]d) in below 8.0mL/100g it is qualified.
＜ heat resistanceheat resistants are anti-thread breakage, incomplete fusion, stomata ＞
Heat resistanceheat resistant is anti-thread breakage, the evaluation of incomplete fusion, based on JIS Z 3104：" steel welded joint (the original text of 1995 defineds： Gang hands) radioactive ray transmission test method " carry out.
After welding terminates, tested with X-ray transmission, confirm weld part (weld length：400mm, but remove arc crater portion) The generation of incomplete fusion, fire check, stomata, measure it and the total length of part occurs.Then, (incomplete fusion, fire check, stomata are passed through Generation part total length) value that calculates of/weld part length × 100 if 0%, is then evaluated as zero, higher than 0% and △ is evaluated as when less than 5%, be evaluated as during higher than 5% ×, × in the case of, it is evaluated as to implement to weld.Then, zero He △ to be qualified.Further, welding cannot carry out in itself for "-".
In addition, for embodiment and each flux-cored wire of comparative example, by method as shown below, evaluation welding operability.
＜ welds operational ＞
On welding operability, by the mother metal shown in for above-mentioned table 5, automatic soldering device is used to carry out upward welding in the vertical position Fillet welding, according to merging between mother metal and welding bead, the cross sectional shape of welding bead is evaluated.In its result, upward welding in the vertical position can be carried out And welding bead surface after welding it is smooth when be zero, upward welding in the vertical position can be carried out, but be when the welding bead surface after welding occurs concavo-convex △, welding slag or molten metal hang when can not enter to weld, or due to when deposition amount deficiency causes the welding bead surface concavity is significantly presented For ×.Then, zero, △ to be qualified.
In addition, also evaluated for welding slag fissility.
On welding slag fissility, in welding slag and the boundary member (weld length of mother metal：400mm) use air chipper (only empty machine FCH-20 processed, air pressure：0.5MPa) impact once, relative to the length of the part of impact, if more than 70% length Welding slag to peel off be then zero, 50% is △ when being peeled off less than the welding slag of 70% length, the weldering of the length less than 50% Be when slag is peeled off ×, × in the case of, it is evaluated as to implement to weld.Then, zero and △ to be qualified.
Further, the detailed welding condition during evaluation of being subjected to property is as follows.
Mother metal：Mother metal shown in table 5
Welding current：220A
Arc voltage：24V
Speed of welding：110mm/ minutes
Prominent length：20mm
Yaw width：5mm
Automatic soldering device：Kobe Steel is made, PICOMAX-2Z
Result above is shown in table 6 below~8.Further, in table 6~8, evaluation criterion, logarithm value are unsatisfactory for Underscore is drawn to represent.
【Table 6】
【Table 7】
【Table 8】
As shown in table 6,7, meet No.1~51 of the specific item of invention of the present invention, be in the assessment item of whole Well.
On the other hand, as shown in table 8, the specific item of invention of No.52~81 due to being unsatisfactory for the present invention, so at some It is bad result in assessment item.It is as follows in detail.
No.52 is because BaF2Content be less than lower limit, and ratio (=BaF2Content/(Al content+Zr's contains Amount) value) be less than lower limit, so toughness deterioration, and can not carry out upward welding in the vertical position fillet welding.
No.53 is because BaF2Content be higher than higher limit, so diffusivity hydrogen amount is more.
For No.54 because C content is less than lower limit, the value of yield strength and tensile strength is low.
For No.55 because C content is higher than higher limit, intensity is superfluous, toughness deterioration.
Because Si content is less than lower limit, stomata occurs No.56.
For No.57 because Si content is higher than higher limit, weld bead shape is poor, and welding operability is poor, and toughness deteriorates.
Because Mn content is less than lower limit, stomata occurs No.58, toughness deterioration.
For No.59 because Mn content is higher than higher limit, intensity is superfluous, toughness deterioration.
For No.60 because Al content is less than lower limit, weld bead shape is poor, and welding operability is poor, and welding slag is peeled off Property also deteriorates.
For No.61 because Al content is higher than higher limit, weld bead shape is slightly convex, and toughness deteriorates.
No.62 is because Mg content is less than lower limit, toughness deterioration, and stomata occurs.
No.63 is because Mg content is higher than higher limit, and welding metal is sagging and can not weld in upward welding in the vertical position fillet welding Connect.
No.64 is because Ni content is less than lower limit, toughness deterioration.
Because Ni content is higher than higher limit, fire check occurs No.65.
No.66 is because Zr content is less than lower limit, and welding metal is sagging and can not weld in upward welding in the vertical position fillet welding Connect.
For No.67 because Zr content is higher than higher limit, weld bead shape is slightly convex, and intensity is superfluous, and toughness is bad Change.
No.68 is because Fe content is less than lower limit, and deposition amount deficiency, weld bead shape is concavity.
No.69 is because Fe content is higher than higher limit, toughness deterioration, and can not carry out upward welding in the vertical position fillet welding.
For No.70 because Li content is less than lower limit, intensity is superfluous, toughness deterioration.
No.71 is because Li content is higher than higher limit, incomplete fusion.
No.72 is because ratio (=BaF2Content/(Al content+Zr content) value) be less than lower limit, so weldering Road shape is poor, and welding operability is poor, and toughness deteriorates.
No.73 is because ratio (=BaF2Content/(Al content+Zr content) value) be higher than higher limit, so folder Slag occurs, and causes incomplete fusion, and weld bead shape is convex.
No.74 is because CaF2Content be higher than higher limit, so upward welding in the vertical position fillet welding can not be carried out.
No.75 is because the content of metal oxide is higher than higher limit, toughness deterioration.
No.76 is because the content of metal carbonate is higher than higher limit, toughness deterioration, and incomplete fusion.
For No.77 because Cr content is higher than higher limit, intensity is superfluous, toughness deterioration.
For No.78 because Mo content is higher than higher limit, intensity is superfluous, toughness deterioration.
For No.79 because NaF content is higher than higher limit, diffusivity hydrogen amount is more.
For No.80 because Ca content is higher than higher limit, upward welding in the vertical position fillet welding is difficult.
For No.81 because Ce and La total content is higher than higher limit, diffusivity hydrogen amount is more.
More than, show that the mode implemented and embodiment are described in detail for the present invention, but spirit of the invention is not Limited by the content, its interest field must be based on the description extensive interpretation of the scope of Patent right requirement.Further, it is of the invention Content it is of course possible to based on it is described record expansion change change etc..
The application is based on Japanese patent application (patent application 2015-143365) filed in 17 days July in 2015, in it Hold and be incorporated into this as reference.
【Industrial applicability】
The flux-cored wire for gas-shielded arc welding of the present invention, particularly in marine structure field and line pipe field It is useful in the welding of works.

Claims (2)

1. a kind of flux-cored wire for gas-shielded arc welding, it is characterised in that be the intracutaneous gas filled with solder flux outside steel Shielded arc welding flux-cored wire,
In welding wire gross mass, contain：
BaF2：More than 2.0 mass % and below 11.1 mass %；
C：More than 0.01 mass % and below 0.10 mass %；
Si：More than 0.10 mass % and below 1.50 mass %；
Mn：More than 0.70 mass % and below 3.50 mass %；
Al：0.45 mass % is less than 2.00 mass %；
Mg：More than 0.10 mass % and below 2.00 mass %；
Ni：More than 0.50 mass % and below 12.00 mass %；
Zr：More than 0.01 mass % and below 1.00 mass %；
Fe：70.0 more than quality % and below 90.0 mass %；
Li：More than 0.01 mass % and below 1.00 mass %,
The BaF2Content/(content of the Al+Zr content) value be more than 2.1 and less than 20.0.
2. flux-cored wire for gas-shielded arc welding according to claim 1, it is characterised in that contain following (a)~(g) In at least one：
(a) in the welding wire gross mass, CaF2：Below 2.0 mass %；
(b) in the welding wire gross mass, metal oxide：Below 0.29 mass %；
(c) in the welding wire gross mass, metal carbonate：Below 10.0 mass %；
(d) in the welding wire gross mass, Cr：Below 1.00 mass % and Mo：At least one among below 1.00 mass % It is individual；
(e) in the welding wire gross mass, NaF：Below 1.00 mass %；
(f) in the welding wire gross mass, Ca：Below 1.00 mass %；
(g) in the welding wire gross mass, Ce and La：Total below 0.300 mass %.
CN201680041319.6A 2015-07-17 2016-06-14 Flux-cored wire for gas-shielded arc welding Active CN107848082B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2015143365A JP6453178B2 (en) 2015-07-17 2015-07-17 Flux-cored wire for gas shielded arc welding
JP2015-143365 2015-07-17
PCT/JP2016/067602 WO2017013965A1 (en) 2015-07-17 2016-06-14 Wire containing flux for gas shield arc welding

Publications (2)

Publication Number Publication Date
CN107848082A true CN107848082A (en) 2018-03-27
CN107848082B CN107848082B (en) 2020-09-04

Family

ID=57834979

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201680041319.6A Active CN107848082B (en) 2015-07-17 2016-06-14 Flux-cored wire for gas-shielded arc welding

Country Status (5)

Country Link
JP (1) JP6453178B2 (en)
KR (1) KR102011608B1 (en)
CN (1) CN107848082B (en)
SG (1) SG11201800258QA (en)
WO (1) WO2017013965A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110315168A (en) * 2018-03-29 2019-10-11 株式会社神户制钢所 High-speed welding flux-cored wire and high speed arc spraying soldering method
CN111571063A (en) * 2020-06-24 2020-08-25 北京金威焊材有限公司 Flux-cored wire for ultralow-temperature stainless steel welding

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7231476B2 (en) * 2019-05-09 2023-03-01 株式会社神戸製鋼所 FLUX CORE WIRE, WELDING METHOD AND WELD METAL
JP7231477B2 (en) * 2019-05-09 2023-03-01 株式会社神戸製鋼所 FLUX CORE WIRE, WELDING METHOD AND WELD METAL
JP7231499B2 (en) * 2019-06-20 2023-03-01 株式会社神戸製鋼所 Flux-cored wire and welding method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62166098A (en) * 1986-01-14 1987-07-22 Nippon Steel Corp Flux-cored wire for gas shielded arc welding
CN1209376A (en) * 1997-08-22 1999-03-03 株式会社神户制钢所 Coat core-wire for gas-protection arc welding
JPH11207491A (en) * 1998-01-26 1999-08-03 Kobe Steel Ltd Flux cored wire for co2 gas shielded arc welding using dc straight polarity and welding method thereof
CN101185996A (en) * 2006-11-20 2008-05-28 株式会社神户制钢所 Flux-cored wire for electrogas welding and electrogas welding metal
CN100553856C (en) * 2006-10-19 2009-10-28 株式会社神户制钢所 Flux-cored wire for gas shielded arc welding for creep-resisting steels
CN102139420A (en) * 2010-02-02 2011-08-03 株式会社神户制钢所 Flux-cored wire
CN104271310A (en) * 2012-05-08 2015-01-07 新日铁住金株式会社 Flux-containing wire for welding ultrahigh-tensile steel
WO2015083878A1 (en) * 2013-12-06 2015-06-11 주식회사 포스코 High-strength welding joint having excellent cryogenic impact toughness, and wire for flux-cored arc welding therefor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060096966A1 (en) * 2004-11-08 2006-05-11 Lincoln Global, Inc. Self-shielded flux cored electrode for fracture critical applications
JP5097499B2 (en) * 2006-10-19 2012-12-12 株式会社神戸製鋼所 Flux-cored wire for gas shielded arc welding for low alloy heat resistant steel
JP4834191B2 (en) * 2009-12-16 2011-12-14 新日本製鐵株式会社 Flux-cored wire for gas shielded arc welding that can be welded in all positions
JP5880662B2 (en) * 2013-11-08 2016-03-09 新日鐵住金株式会社 Flux-cored wire for gas shielded arc welding, welding method of steel for cryogenic temperature, and manufacturing method of welded joint
JP2016187828A (en) * 2015-03-30 2016-11-04 株式会社神戸製鋼所 Flux-cored wire for gas shield arc welding

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62166098A (en) * 1986-01-14 1987-07-22 Nippon Steel Corp Flux-cored wire for gas shielded arc welding
CN1209376A (en) * 1997-08-22 1999-03-03 株式会社神户制钢所 Coat core-wire for gas-protection arc welding
JPH11207491A (en) * 1998-01-26 1999-08-03 Kobe Steel Ltd Flux cored wire for co2 gas shielded arc welding using dc straight polarity and welding method thereof
CN100553856C (en) * 2006-10-19 2009-10-28 株式会社神户制钢所 Flux-cored wire for gas shielded arc welding for creep-resisting steels
CN101185996A (en) * 2006-11-20 2008-05-28 株式会社神户制钢所 Flux-cored wire for electrogas welding and electrogas welding metal
CN102139420A (en) * 2010-02-02 2011-08-03 株式会社神户制钢所 Flux-cored wire
CN104271310A (en) * 2012-05-08 2015-01-07 新日铁住金株式会社 Flux-containing wire for welding ultrahigh-tensile steel
WO2015083878A1 (en) * 2013-12-06 2015-06-11 주식회사 포스코 High-strength welding joint having excellent cryogenic impact toughness, and wire for flux-cored arc welding therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110315168A (en) * 2018-03-29 2019-10-11 株式会社神户制钢所 High-speed welding flux-cored wire and high speed arc spraying soldering method
CN110315168B (en) * 2018-03-29 2021-10-08 株式会社神户制钢所 Flux-cored wire for high-speed welding and high-speed arc welding method
CN111571063A (en) * 2020-06-24 2020-08-25 北京金威焊材有限公司 Flux-cored wire for ultralow-temperature stainless steel welding

Also Published As

Publication number Publication date
CN107848082B (en) 2020-09-04
JP6453178B2 (en) 2019-01-16
KR20180016569A (en) 2018-02-14
SG11201800258QA (en) 2018-02-27
JP2017024032A (en) 2017-02-02
WO2017013965A1 (en) 2017-01-26
KR102011608B1 (en) 2019-08-16

Similar Documents

Publication Publication Date Title
JP5768547B2 (en) High-strength steel flux cored wire for gas shielded arc welding
JP5359561B2 (en) Flux-cored wire for high-tensile steel
EP2289661B1 (en) Flux cored wire for gas shielded arc welding of high strength steel
JP6809533B2 (en) Flux-cored wire, welded joint manufacturing method, and welded joint
CN107848082A (en) Flux-cored wire for gas-shielded arc welding
KR101984440B1 (en) Flux cored wire for gas shield arc welding
KR101984441B1 (en) Flux cored wire for gas shield arc welding
KR101708997B1 (en) Ni BASED ALLOY FLUX CORED WIRE
JP6953869B2 (en) Flux-cored wire for gas shielded arc welding and welding joint manufacturing method
US20110073570A1 (en) Flux cored wire for gas shielded arc welding of high strength steel
JP2014113615A (en) Flux-cored wire for carbon dioxide gas shielded arc welding
JP5356142B2 (en) Gas shield arc welding method
JP2015217393A (en) Flux-cored wire for carbon dioxide gas shielded arc welding
JP5459083B2 (en) Flux-cored wire for carbon dioxide shielded arc welding for high-tensile steel
JP2009248137A (en) Flux cored wire for gas-shielded arc welding
JP2019048324A (en) Flux-cored wire for gas shield arc-welding, and method of manufacturing weld joint
JP6953870B2 (en) Flux-cored wire for gas shielded arc welding and welding joint manufacturing method
JP6322096B2 (en) Flux-cored wire for gas shielded arc welding
KR101962050B1 (en) Flux-cored wire for gas-shielded arc welding
CN111886110B (en) Flux-cored wire
JP2011025271A (en) Flux-cored wire
JP2022061805A (en) Method for manufacturing weld joint, and flux-cored cut wire for groove filling
KR20150123483A (en) Flux cored wire for co2 gas shielded arc welding

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant