CN101396777A - Flux-cored wire for electrogas arc welding - Google Patents
Flux-cored wire for electrogas arc welding Download PDFInfo
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- CN101396777A CN101396777A CNA2008101489984A CN200810148998A CN101396777A CN 101396777 A CN101396777 A CN 101396777A CN A2008101489984 A CNA2008101489984 A CN A2008101489984A CN 200810148998 A CN200810148998 A CN 200810148998A CN 101396777 A CN101396777 A CN 101396777A
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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
- B23K35/3053—Fe as the principal constituent
- B23K35/3073—Fe as the principal constituent with Mn as next major constituent
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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
- B23K35/36—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
- B23K35/3601—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 with inorganic compounds as principal constituents
- B23K35/3602—Carbonates, basic oxides or hydroxides
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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
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
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- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
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Abstract
The present invention provides a flux-cored wire for electrogas welding, which has excellent operability in single-electrode electrogas welding of thick steel plate, and additionally can obtain a welding metal that has high strength and excellent impact property. The flux-cored wire for electrogas welding comprises the following components with the percent by weight: 0.03-0.07wt% of C, 0.3-0.6wt% of Si, 1.8-2.0wt% of Mn, 0.9-1.2wt% of Ni, 0.3-0.8wt% of Mo, 0.10-0.27wt% of Ti, 0.008-0.014wt% of B, 0.15-0.30wt% of Mg, less than 0.05wt% of Al, less than 0.025wt% of P, less than 0.025wt% of S, 1.0-2.0wt% of sinter forming agent, and 0.4-0.7wt% of F in the sinter forming agent.
Description
Technical field
The present invention relates to carry out the upright single electrode flux-cored wire for electrogas arc welding of the steel plate of YP 460 steel etc. to single-run welding (verticalone-pass welding).
Background technology
Electro-gas (enclosed) welding is upright to welding method (high-efficiency vertical weldingprocess) as high-duty, is applied to the broad field of boats and ships, oil storage jar and bridge etc.Recently, the economy of all states in Chinese East Asia, industry send out industry significantly, along with the increase of logistics capacity, be purpose with the conveying of the efficient activity of container cargo, the maximization of container ship advances rapidly.
Along with the maximization of container ship, the wall thickening of side plate (side shell plating) or coaming (hatch coaming) etc. advances, when container load weight is 8000TEU, if use yield strength (yield strength) 390N/mm
2Steel, then applied thickness is about 80mm.On the other hand, the yield strength of steel is 460N/mm
2More than, use thickness of slab and can be thinned to about 60mm, can make the hull lightweight.Thus, combustion takes efficient and improves, and the efficient of welding procedure simultaneously also improves.Therefore, the high strength of steel advances, and just flux-cored wire for electrogas arc welding is correspondingly developed in expectation.
Always, relevant electro-gas (enclosed) welding is 460N/mm for yield strength
2More than the research of application of such high-intensity steel carry out always.For example patent documentation 1 proposes a kind of electro-gas welding method, and it is by the chemical composition of regulation welding wire and the chemical composition of weld metal, and anti-brittle break characteristic (ante-brittee fracture characteristics) is improved.
But in order to be suitable for this high-intensity steel, guaranteeing of strength of welded joint is very important.When carrying out the such high heat energy input welding (high-heat input welding) of electro-gas (enclosed) welding, the width of the heat affected zone of steel (heat affected zone) is big, therefore the softening width of the steel that cause of heat affecting is also big, just exists and can not guarantee the problem points that sufficient strength of joint is such.
Therefore, propose in order to solve this problem, further improve the intensity of weld metal as compared with the past, the plastic deformation of constraint heat affected zone realizes guaranteeing of strength of joint.
[patent documentation 1] spy opens the 2005-329460 communique
Yet, if merely in existing welding wire, further add alloying component, to improve intensity, the viscosity of the slag when then welding uprises, the operation variation, mother metal dilution (base materialdilution) simultaneously also diminishes, so the intensity of weld metal becomes too high, has the problem points of toughness deterioration.
Summary of the invention
The present invention does in view of this problem points, and its purpose is, a kind of flux-cored wire for electrogas arc welding is provided, and its operation excellence in the single electrode electro-gas (enclosed) welding of steel plate can access the intensity height in addition, and the weld metal of impact property excellence.
Flux-cored wire for electrogas arc welding of the present invention (flux-cored wire), be to be formed with the 1 couple soldered plate of face side than the groove (groove) of rear side broadness in order to dispose, described groove is extended upward at upper and lower, the slip copper coin that slides upward with respect to described soldered plate at the face side liner of described soldered plate, the gasket material (backing material) that is fixed facing to described soldered plate at the rear side liner of described soldered plate, by the single electrode electro-gas (enclosed) welding to implementing the flux-cored wire that vertical butt welding (vertical butt welding) is used in the described groove, it is characterized in that, in the welding wire gross mass, contain
C:0.03～0.07 quality %,
Si:0.3～0.6 quality %,
Mn:1.8～2.0 quality %,
Ni:0.9～1.2 quality %,
Mo:0.3～0.8 quality %,
Ti:0.10～0.27 quality %,
B:0.008～0.014 quality %,
Mg:0.15～0.30 quality %,
Slag generates agent: 1.0～2.0 quality %,
Slag generates among the agent, F:0.4～0.7 quality % (the F scaled value is based on the welding wire gross mass), regulation
Below the Cr:0.1 quality %,
Below the Cu:0.3 quality %,
Below the Al:0.05 quality %,
Below the P:0.025 quality %,
Below the S:0.025 quality %.
Other flux-cored wire for electrogas arc welding of the present invention is characterized in that, make metal carbonate with CO
2The scaled value meter contains CO in the welding wire gross mass
2: 0.10～0.25 quality %.
According to the present invention, the operation raising of the single electrode electro-gas (enclosed) welding of steel plate can access the intensity height in addition, and the weld metal of impact property excellence.
Description of drawings
Fig. 1 is the figure of expression welding method.
Symbol description
1: soldered plate
2: the slip copper coin
3: the liner material
4: the protective gas supply unit
5: weld metal
6: slag and molten bath
7: electrode
8: pipe
9: the slag drain tank
The specific embodiment
Below, the mode for enforcement of the present invention specifies with reference to accompanying drawing.Fig. 1 is that flux-cored wire of the present invention (flux-cored wire) is used in expression, by the single electrode electro-gas (enclosed) welding, carries out the ideograph of the method for vertical butt welding (vertical butt welding).This Fig. 1 is the figure of inside that shows the V groove (V-groove) of welded steel 1, and the right side of figure is the surface of welded steel, and the left side is the back side.In the groove part of the rear side of soldered plate 1, liner has the gasket material 3 that is fixed with respect to soldered plate 1, and in the groove part of the face side of soldered plate 1, liner has with respect to soldered plate 1 and the slip copper coin 2 that slides upward.On the top of this slip copper coin 2, be provided with to the supply unit 4 of groove to the protective gas of supplying with protective gas.Slip copper coin 2 self is by the water quench of supplying with via pipe 8.Then, from the face side of soldered plate 1 welding electrode 7 is inserted in the groove, generate electric arc by welding electrode 7, the edge the thickness direction teeter (weaving) of soldered plate 1, and the limit is risen slip copper coin 2, welds soldered plate 1.Thus, liquid slag (liquidslag) and molten bath (weld pool) 6 is formed, and molten bath 6 is solidified and formed weld metal 5.Between slip copper coin 2 and soldered plate 1, be formed with slag drain tank (slag escape groove) 9.
In the vertical butt welding that this single electrode electro-gas (enclosed) welding of utilization is carried out, what present inventors studied with keen determination found that, by further suitably stipulating the chemical composition of welding wire, even in high-intensity welding point, operation is also good, can improve the impact property of weld metal.
In order to improve the restraining force of the plastic deformation that retrains heat affected zone, always need to improve the intensity of weld metal, therefore, need make welding increase the alloying component of Si, Mn, Mo etc.But if these compositions increase, then the viscosity of motlten metal and liquid slag uprises, and can not discharge slag well from slag drain tank shown in Figure 1.Therefore, slag excessively stockpiles in the molten bath, causes the electric arc instability.Fusion penetration (penetration) also shoals, and takes place easily to merge bad (incomplete fusion), also has intensity to become too high in addition, and toughness is the such problem of deterioration also.
In addition, for the toughness deterioration, in the past, mainly can have the Ni that makes the toughness stabilization effect and realize improving by interpolation.But, add alloying component if so based on the composition system of Ni, to improve strength of joint, then confirm the tendency of toughness deterioration.
Therefore, present inventors are in order to develop the improvement that can realize aforesaid weld job, be that slag discharge property is good, and a word used for translation that can access the welding wire of the good weld metal of impact is sent out and is and research with keen determination, its result shows, add suitableization of the alloying component in the welding wire to, and tight regulation slag generates the amount of agent and the amount of F wherein is effective.
If the viscosity height of motlten metal and liquid slag, then as described above, the discharge variation of slag.But, do not make it excessively then can suppress the rising of the viscosity of motlten metal and liquid slag by adjusting Si, Mn addition.In addition,, can make liquid slag flow to the slag drain tank easily, prevent that the high motlten metal of viscosity from stopping up the slag drain tank by increasing the amount that slag generates agent (slag forming agent).In addition,, can reduce the viscosity of liquid slag, optimize and discharge property by the F amount among the increase slag generation agent.
About impact property, by reduced the Ni amount than in the past, add Mo as can be known, can make and organize miniaturization, the intensity and the toughness of slab are possessed effect really.But,, then do not reduce the effect of transition temperature, the toughness deterioration under the low temperature if excessively reduce Ni.On the other hand, if the Mo amount is excessive, then quenching effect (quenching effect) height, so intensity becomes too high, moves towards the direction of toughness deterioration.So, suitableization of Ni, Mo amount is very important to the stabilisation of the intensity of weld metal and toughness.
Below, add reason and form limiting reason and describe for the composition of flux-cored wire of the present invention.Also have, at this so-called quality %, unless special the qualification, otherwise all refer to account for the quality % of welding wire gross mass.
" C:0.03～0.07 quality % "
C is the indispensable element of intensity that is used to guarantee weld metal, but as if interpolation exceedingly, then toughness deterioration for the purpose of raising intensity.Therefore, add in order to improve intensity C reach existing more than for preferred.When the quality of C was lower than 0.03 quality %, the intensity of weld metal reduced, and can not get target strength.On the other hand, if C surpasses 0.07 quality %, then the intensity of weld metal is too high, the toughness deterioration.Also have,, C in C, C monomer, iron powder and the metal powder of (steel sheath) in the steel crust etc. is arranged as the C source.But, the CO in the containing metal carbonate not
3, CO
2More preferably C is 0.04～0.04 quality %.
" Si:0.3～0.6 quality % "
In order to improve the intensity of weld metal, need to add Si more than ever beforely.In addition, Si can reduce the oxygen amount of weld metal as deoxidier, the effect that also has the toughness of making to improve.When the quality of Si is lower than 0.3 quality %, the toughness deterioration of weld metal.On the other hand, if Si surpasses 0.6 quality %, then the viscosity of liquid slag uprises, and slag discharge property is poor, and the electric arc instability merges bad generation.Also have,, Si, Fe-Si, Fe-Si-Mn, Fe-Si-B, Fe-Si-Mg, REM-Ca-Si etc. in the steel crust are arranged as the Si source.
" Mn:1.8～2.0 quality % "
In order to improve the intensity of weld metal, also need to add Mn more than ever beforely.In addition, Mn also has the oxygen amount that reduces weld metal as deoxidier, the effect that toughness is improved.When the quality of Mn was lower than 1.8 quality %, the intensity of weld metal reduced, and can not get target strength.On the other hand, if Mn surpasses 2.0 quality %, then the intensity of weld metal becomes too high, the toughness deterioration.Also have,, Mn, metal M n, Fe-Mn, Fe-Si-Mn etc. in the steel crust are arranged as the Mn source.
" Ni:0.9～1.2 quality % "
Ni is an austenite former, as described above, has the stable effect of toughness that makes weld metal.But, in order to add the alloying component of Mo etc., guarantee toughness by organizing micronized effect (microstructurerefinement effect), need than the addition that in the past reduced Ni until toughness can be stable degree.But, when the quality of Ni is lower than 0.9 quality %, the unstable and deterioration of the toughness of weld metal.On the other hand, if Ni surpasses 1.2 quality %, then intensity becomes too high, the toughness deterioration.Also have,, metal Ni, Fe-Ni, Ni-Mg etc. are arranged as the Ni source.
" Mo:0.3～0.8 quality % "
In order to improve the intensity of weld metal, need to add Mo more than ever beforely.In addition, Mo is a ferrite former, has the effect of the hardenability that improves weld metal, is to solidified structure miniaturization (refinement of soldidification microstructure) effective elements.Therefore, Mo improves toughness.When the quality of Mo was lower than 0.3 quality %, the intensity of weld metal reduced, and can not get the strength of welded joint of target.On the other hand, if Mo surpasses 0.8 quality %, then intensity uprises, the toughness deterioration.Also have,, metal M o, Fe-Mo etc. are arranged as the Mo source.More preferably Mo is 0.4～0.6 quality %.
" Ti:0.10～0.27 quality % "
Ti utilizes with the synergy of B and makes weld metal organize miniaturization, has the effect that the toughness of making improves.When the quality of Ti is lower than 0.10 quality %, the micronized effect that can not get organizing, the toughness deterioration of weld metal.On the other hand, if Ti surpasses 0.27 quality %, Ti surplus in weld metal then, toughness deterioration.Also have, as the Ti source, metal Ti, Fe-Ti etc.More preferably Ti is 0.15～0.25 quality %.
" B:0.008～0.014 quality % "
B is by a spot of interpolation, with the synergy of Ti under make weld metal organize miniaturization, have the effect that improves toughness.When the quality of B is lower than 0.008 quality %, the micronized effect that can not get organizing, the toughness deterioration of weld metal.On the other hand, if B ultrasonic crosses 0.014 quality %, B surplus in the weld metal then, it is too high that intensity becomes, the toughness deterioration.Also have,, Fe-B, Fe-Si-B, B are arranged as the B source
2O
3Deng.
" Mg:0.15～0.30 quality % "
Mg has the oxygen amount that reduces weld metal as deoxidier, the effect that toughness is improved.When the quality of Mg is lower than 0.15 quality %, can not get weld metal oxygen amount and reduce effect, the toughness deterioration of weld metal.On the other hand, if Mg surpasses 0.30 quality %, electric arc instability then, pilosity splashes.Also have,, metal M g, Al-Mg, Fe-Si-Mg, Ni-Mg etc. are arranged as the Mg source.More preferably Mg is 0.18～0.25 quality %.
" Al:0.05 quality % is following "
If the Al of weld metal amount is high, the micronized effect of organizing that then the Ti oxide brings is suppressed, the toughness deterioration, so Al is suppressed at below the 0.05 quality %.More preferably Al is below the 0.03 quality %.
" Cu:0.3 quality % is following "
Cu does not painstakingly add.But,, still allow the amount of this degree because the plating of the outer peripheral face of flux-cored wire can be contained below the 0.3 quality % inevitably.More preferably Cu is below the 0.2 quality %.
" Cr:0.1 quality % is following "
Cr is a ferrite former, has the effect of the hardenability that improves weld metal, and is less but this effect is compared with Mo, need not painstakingly add, but can contain 0.1 quality % inevitably and be allowed to.More preferably Cr is below the 0.06 quality %.
" P, S:0.025 quality % are following "
If P, S height heat cracking then take place easily take place, therefore it is suppressed at below the 0.025 quality % respectively.More preferably P, S are respectively below 0.015 quality %.
" slag generates agent: 1.0～2.0 quality % "
Slag generate agent for arc stabilityization, the reduction of splashing, burn weld jobs such as preventing stabilisation integral.Weld metal composition of the present invention, alloying element is many, and the oxidized one-tenth component of motlten metal is also many.Therefore, the viscosity of motlten metal and liquid slag uprises, and motlten metal can stop up the slag drain tank, in addition, because the high liquid slag of viscosity also can cause the remarkable variation of discharge of slag.Therefore,, make motlten metal can not come the slag drain tank, thereby suppress the deterioration of operation than increased the amount that slag generates agent in the past.If generating the amount of agent, slag is lower than 1.0 quality %, slag quantity not sufficient then, and motlten metal can stop up the slag drain tank, and therefore the discharge variation of slag takes place to merge bad.In addition, slag can't suppress motlten metal, burns easily.On the other hand, if the slag amount surpasses 2.0 quality %, the slag amount of then being supplied with is excessive, and the discharge of slag is variation on the contrary.Therefore, the electric arc instability takes place to merge bad.More preferably slag generation agent is 1.3～1.8 quality %.
" slag generates among the agent, F:0.4～0.7 quality % (the F scaled value is based on the welding wire gross mass) "
Only stipulate that aforesaid slag generates the amount of agent, can not realize the raising of operation.Therefore, study for the F amount of slag generation agent.F has the viscosity that reduces liquid slag, makes the discharge of slag fall the effect of raising.If its quality is lower than 0.4 quality %, the discharge variation of slag then, the electric arc instability takes place to merge bad.On the other hand, if F surpasses 0.7 quality %, then the viscosity of liquid slag became low, and discharge property is too good, therefore can't keep motlten metal, and motlten metal burns easily.The F amount is 0.5～0.7 quality % more preferably.Also have,, CaF is arranged as the F source
2, BaF
2, NaF, K
2SiF
6, SrF
2, AlF
3, MgF
2, LiF etc.So-called F amount is the value that the amount of these compounds is converted into the F amount, is the content in the welding wire gross mass.
" CO
2: 0.10～0.25 quality % "
CO
2Usually be added in the welding wire by carbonate.The CO that takes place because of the decomposition of carbonate
2Has the stable effect that enlarges electric arc.By add carbonate in welding wire, electric arc is stable under broad state, so liquid slag is discharged from the slag drain tank with being stabilized.If CO
2Amount is lower than 0.10 quality %, then can not get this effect, easily takes place warm bad.On the other hand, if CO
2Amount surpasses 0.25 quality %, and then the gas generating capacity is excessive, and electric arc has some instabilities easily.More preferably CO
2Be 0.15～0.2 quality %.Also have,, CaCO is arranged as carbonate
3, MgCO
3, BaCO
3, Li
2CO
3, Na
2CO
3, Sr
2CO
3Deng.So-called CO
2Amount is the CO of these carbonate
2The amount scaled value.
Also have, generate agent, SiO is arranged as slag
2, CaO, Na
2O, MgO, Al
2O
3, Li
2O, CaF
2, BaF
2, NaF, SrF
2, K
2O, K
2SiF
6, AlF
3, MgF
2, LiF, CaCO
3, MgCO
3, BaCO
3, Li
2CO
3, Na
2CO
3, Sr
2CO
3Deng.
The surplus of flux-cored wire is except Fe, B
2O
3O and REM beyond, be unavoidable impurities.Also have, among the surplus, Fe contains more than the 90 quality %, the Fe of the alloy that this Fe source is steel crust, iron powder, Fe etc.
In addition, the scaling powder filling rate of flux-cored wire of the present invention is to account for 20～30 quality % of welding wire gross mass.
[embodiment]
In electro-gas (enclosed) welding of the present invention, because it is also not little to be subjected to the influence of mother metal, so as suitable steel plate, rolled steel for general structure, rolled steel for welded structure, Welding Structure with high yield strength steel plate, building structure with rolled steel, boats and ships with employed steel plate among, the scope shown in the preferred following table 1 (unit is quality %).The welded steel of Shi Yonging is the steel plate shown in the following table 2 (unit is quality %) in the present embodiment.This confession examination steel plate has the size of thickness of slab 60mm, wide 500mm, long 1000mm.In this table 1 and 2, carbon equivalent Ceq is by following numerical expression 1 performance.
[table 1]
[table 2]
[several 1]
Ceq＝C+Mn/6+(Cu+Ni)/15+(Cr+Mo+V)/5
Then, following table 3 shows experimental condition, and table 4 shows the welding procedure condition.Carry out single-run welding with the condition shown in this table 3 and the table 4.Yet in welding, confirm operation.After the welding, carry out UT and check, confirm to have fusion bad.Also have, each 100mm that welds unsettled startup side and arc crater (crater) side is for checking object.Therefore, effective length is 800mm.Also have, the meeting of burning in the way shortens.In the scope of effective length, unconfirmed be ◎ to merging bad, merge bad length be lower than 2% be zero, above 2% be *.Also have, the welding wire line directly is 1.6mm.
[table 3]
| Welding method | Upright to automatic single electrode single pass welding welding |
| Welder | Upright to automatic single electrode single pass welding welder |
| The liner material | Gu shape fire proofed wood |
| Welding wire is given prominence to length | 30～35mm |
| Sealing gas | 100 quality %CO 240 liters/minute |
[table 4]
| Thickness of slab (mm) | Bevel angle (°) | Gap (mm) | Welding current (A) | Arc voltage (V) | Speed of welding (cm/ minute) | Input heat (kJ/cm) |
| 60 | 20 | 8～12 | 380～420 | 41～45 | 2.0～3.0 | 330～500 |
Groove shape: V groove
About the impact test of weld metal, according to the method for JIS Z 3128 defineds, the impact value under measuring-20 ℃, the mean value of 3 impact values be 53J above to be judged as impact property good.The intensity of weld metal uses NK UIA test film to measure (test film diameter 10mm, gauge length 50mm), with 600N/mm in the position of the central portion of weld metal
2It more than is target strength.
Following table 5 and table 6 show the chemical composition (unit is quality %) of welding wire.The characteristic of the weld metal when welding with these welding wires in addition, is presented in the table 7.
The welding wire of the embodiment 1～14 of the composition shown in this table 5 and the table 6, weld job is good, and toughness is also good, can access the weld metal intensity as target.
The welding wire of comparative example 15, the slag of welding wire generates among the agent, and the amount of F is lower than 0.4 quality %, and the discharge of slag is poor, merges bad generation.
The welding wire of comparative example 16, the C amount of welding wire is lower than 0.03 quality %, and the Mn amount surpasses 2.0 quality %, and the Mo amount is lower than 0.3 quality %, can't obtain the intensity of target.
In the comparative example 17, the C of welding wire amount surpasses 0.07 quality %, and the Mn amount surpasses 2.0 quality %, and the Mo amount surpasses 0.8 quality %, and the intensity of weld metal is too high, the toughness deterioration.
In the comparative example 18, welding wire Si amount is lower than 0.3 quality %, toughness deterioration.
In the comparative example 19, the Ti of welding wire amount surpasses 0.27 quality %, and the B amount surpasses 0.014 quality %, and weld metal intensity is too high, the toughness deterioration.
In the comparative example 20, the amount that the slag of welding wire generates agent surpasses 2.0 quality %, and the discharge variation of slag has taken place to merge bad.
In the comparative example 21, the amount that the slag of welding wire generates agent is lower than 1.0 quality %, and the discharge variation of slag has taken place to merge bad.In addition, weld metal burns in the welding way.
In the comparative example 22, the Si of welding wire amount surpasses 0.6 quality %, and the discharge variation of slag has taken place to merge bad.In addition, weldering surpasses 1.2 quality % than the Ni amount, and weld metal intensity becomes too high, the toughness deterioration.
In the comparative example 23, welding wire Ti amount is lower than 0.10 quality %, and the B amount is lower than 0.008 quality %, can not get the micronized effect of weld metal tissue, the toughness deterioration.
In the comparative example 24, the F amount surpassed 0.7 quality % among the slag of welding wire generated agent, and welding is burnt in the way.
In the comparative example 25, the Mn of welding wire amount is lower than 1.8 quality %, can not get the intensity of target.
In the comparative example 26, the Ni of welding wire amount is lower than 0.9 quality %, toughness deterioration.
In the comparative example 27, the Mg of welding wire amount is lower than 0.15 quality %, toughness deterioration.
In the comparative example 28, the Mg of welding wire amount surpasses 0.30 quality %, and pilosity splashes.
In the comparative example 29, the P of welding wire amount surpasses 0.025 quality %, and heat cracking takes place, the toughness deterioration.
In the comparative example 30, the S of welding wire amount surpasses 0.025 quality %, and heat cracking takes place, the toughness deterioration.
In the comparative example 31, the Al of welding wire amount surpasses 0.05 quality %, toughness deterioration.
In the comparative example 32, the Cu of welding wire amount surpasses 0.3 quality %, and welding is burnt in the way.
In the comparative example 33, the Cr of welding wire amount surpasses 0.10 quality %, and it is many that melt pool resides becomes, and pilosity splashes.
[table 5]
[table 6]
[table 7]
Claims (2)
1. flux-cored wire for electrogas arc welding; It is characterized in that; Be the flux-cored wire that is used in following welding: configuration is formed with face side than the welded fishplate bar of 1 couple of the groove of rear side broadness; Described groove is extended upward at upper and lower; At the face side liner of described welded fishplate bar and the described welded fishplate bar slip copper coin of relative sliding up; The liner material that is fixed with respect to described welded fishplate bar at the rear side liner of described welded fishplate bar; By the single electrode electro-gas (enclosed) welding to implementing vertical butt welding in the described groove
Described flux-cored wire for electrogas arc welding contains C:0.03～0.07 quality %, Si:0.3～0.6 quality %, Mn:1.8～2.0 quality %, Ni:0.9～1.2 quality %, Mo:0.3～0.8 quality %, Ti:0.10～0.27 quality %, B:0.008～0.014 quality %, Mg:0.15～0.30 quality %, slag generation agent in the welding wire gross mass: 1.0～2.0 quality %
In slag generates agent, based on the welding wire gross mass in the F scaled value, F:0.4～0.7 quality %,
And, limit below the Cr:0.1 quality %, below the Cu:0.3 quality %, below the Al:0.05 quality %, below the P:0.025 quality %, below the S:0.025 quality %.
2. flux-cored wire for electrogas arc welding according to claim 1 is characterized in that, with metal carbonate with CO
2The scaled value meter contains CO in the welding wire gross mass
2: 0.10～0.25 quality %.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-254416 | 2007-09-28 | ||
| JP2007254416A JP5165322B2 (en) | 2007-09-28 | 2007-09-28 | Flux-cored wire for electrogas arc welding |
| JP2007254416 | 2007-09-28 |
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| Publication Number | Publication Date |
|---|---|
| CN101396777A true CN101396777A (en) | 2009-04-01 |
| CN101396777B CN101396777B (en) | 2011-05-04 |
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| CN2008101489984A Active CN101396777B (en) | 2007-09-28 | 2008-09-22 | Flux-cored wire for electrogas arc welding |
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| JP (1) | JP5165322B2 (en) |
| KR (1) | KR101003249B1 (en) |
| CN (1) | CN101396777B (en) |
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| CN102528317A (en) * | 2010-12-20 | 2012-07-04 | 昆山京群焊材科技有限公司 | Flux-cored wire for electrogas welding |
| CN102554519A (en) * | 2011-12-14 | 2012-07-11 | 安泰科技股份有限公司 | Flux-cored wire for master cable energy forced shaping, and preparation and application method thereof |
| CN103962743A (en) * | 2014-04-30 | 2014-08-06 | 西安理工大学 | Welding stick for all-position welding of X100 pipeline steel and manufacturing method thereof |
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| CN106536114A (en) * | 2014-07-25 | 2017-03-22 | 株式会社神户制钢所 | Electrogas arc welding method and electrogas arc welding apparatus |
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| JP5400461B2 (en) * | 2009-04-22 | 2014-01-29 | 株式会社神戸製鋼所 | Flux cored wire |
| JP5400472B2 (en) * | 2009-05-20 | 2014-01-29 | 株式会社神戸製鋼所 | Flux cored wire |
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| JP3345295B2 (en) * | 1996-08-15 | 2002-11-18 | 株式会社神戸製鋼所 | Flux-cored wire for electrogas arc welding |
| JP4372604B2 (en) * | 2004-04-12 | 2009-11-25 | 日鐵住金溶接工業株式会社 | Flux-cored wire for electrogas arc welding |
| JP2005305498A (en) * | 2004-04-21 | 2005-11-04 | Nippon Steel & Sumikin Welding Co Ltd | Flux-cored wire for electrogas arc welding |
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| JP4776508B2 (en) * | 2006-11-20 | 2011-09-21 | 株式会社神戸製鋼所 | Flux-cored wire for electrogas arc welding |
-
2007
- 2007-09-28 JP JP2007254416A patent/JP5165322B2/en active Active
-
2008
- 2008-09-22 CN CN2008101489984A patent/CN101396777B/en active Active
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| CN102528317A (en) * | 2010-12-20 | 2012-07-04 | 昆山京群焊材科技有限公司 | Flux-cored wire for electrogas welding |
| CN102554519A (en) * | 2011-12-14 | 2012-07-11 | 安泰科技股份有限公司 | Flux-cored wire for master cable energy forced shaping, and preparation and application method thereof |
| CN103962743A (en) * | 2014-04-30 | 2014-08-06 | 西安理工大学 | Welding stick for all-position welding of X100 pipeline steel and manufacturing method thereof |
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| CN113001058B (en) * | 2021-03-05 | 2022-09-20 | 李素坤 | Flux-cored wire matched with steel for high heat input welding and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5165322B2 (en) | 2013-03-21 |
| KR101003249B1 (en) | 2010-12-21 |
| KR20090033120A (en) | 2009-04-01 |
| CN101396777B (en) | 2011-05-04 |
| JP2009082947A (en) | 2009-04-23 |
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