CN105364339A - Flux-cored wire for full-argon gas shielded arc welding as well as preparation method and application of flux-cored wire - Google Patents
Flux-cored wire for full-argon gas shielded arc welding as well as preparation method and application of flux-cored wire Download PDFInfo
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- CN105364339A CN105364339A CN201510980570.6A CN201510980570A CN105364339A CN 105364339 A CN105364339 A CN 105364339A CN 201510980570 A CN201510980570 A CN 201510980570A CN 105364339 A CN105364339 A CN 105364339A
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- flux
- cored wire
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- medicinal powder
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Classifications
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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
-
- 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
Abstract
The invention discloses a flux-cored wire for full-argon gas shielded arc welding as well as a preparation method and an application of the flux-cored wire. The flux-cored wire comprises powder and a tube wall for covering the powder, wherein the powder comprises components in percentage by mass as follows: no more than 0.12% of C, no more than 0.4% of Si, no more than 1.5% of Mn, 0.35%-0.6% of Mo, no more than 0.035% of S, no more than 0.035% of P, 0-2.0% of K2CO3 powder, 0.5%-1.5% of potassium permanganate powder and the balance of Fe and inevitable impurities having no influence on the performance of the flux-cored wire. The flux-cored wire has the deeper penetration, so that a base material is not required to be grooved, or only a small groove is required to be formed and a large truncated edge is required to be reserved, the filler metal quantity is reduced, and the welding productivity is greatly improved. Meanwhile, the welding defect of incomplete fusion cannot be produced easily, and the safety of a welded structure is improved.
Description
Technical field
The present invention relates to a kind of welding material, particularly relate to a kind of full-argon gas shielded arc welding and connect with flux-cored wire and preparation method thereof and application.
Background technology
Along with the fast development of industrial technology, Welding Structure is to maximization, high parameter, high-strength tenacity future development.The application of cut deal in Welding Structure of high-strength tenacity gets more and more, and current submerged-arc welding, full-argon gas shielded arc welding are the main technique of cut deal welding.The welding of cut deal needs bevel, multi-layer multi-pass welding, welding production complex procedures, and welding production efficiency is low.Publication No. is that CN103831541A patent of invention " high-strength steel banjo fixing butt jointing laser-MIG electric arc complex welding method " adopts laser-MIG electric arc composite heat power supply to improve fusion penetration, and the method equipment is complicated, and investment is large, and very flexible, application is restricted.By the activating agent of special component organic solution furnishing pasty state, be coated in clean welding work pieces surface, welding after organic solution volatilization, can improve fusion penetration.The patent relating to activating agent as publication No. be the patent of invention " a kind of activating agent of welding for weathering steel MAG and using method " of CN103962752A, the publication No. patent of invention " a kind of activating agent of welding for stainless steel MAG and using method " that is CN103962750A, the publication No. patent of invention " a kind of activating agent for Titanium Alloy Argon Tungsten-arc " etc. that is CN102626839A.Activating agent is mainly used in the material such as stainless steel, titanium or titanium alloy at present, and the use of activating agent adds welding production operation, also exist and use inconvenient shortcoming, and consumption is also not easy accurate control, makes the stability of welding quality slightly poor.The activating agent being applicable to carbon steel also rarely has report.
It is flux-cored wire and solid core welding wire that full-argon gas shielded arc welding connects conventional welding material.The advantages such as flux-cored wire has arc stability, it is little to splash, chemical composition adjustment is easy, but its there is manufacturing process complexity, cost is high, particularly Wire Performance is not as solid core welding wire, the shortcomings such as remote wire feed poor stability.The Wire Performance of solid core welding wire is good, but its composition adjustment difficulty, spatter is large, arc stability is poor, and fusion penetration is more shallow, and particularly the fusion penetration of MIG weldering is more shallow, in order to through welding, often needs out large groove, and this just makes to fill amount of metal increases, and welding productivity reduces.
Along with increasing gradually of large welded structures application, and day by day harsh (as low temperature, large load, the high temperature etc.) of structure operating condition, the application of cut deal increases gradually, welding job amount increases considerably, user is to low cost, Wire Performance excellence, large, the stay-in-grade high efficiency welding material of fusion penetration, and the flux-cored wire demand being particularly suitable for automatic welding is also more urgent.
Summary of the invention
The object of the invention is for existing flux-cored wire full-argon gas shielded arc welding fusion penetration shallow, need bevel, multi-pass welding, the drawbacks such as welding productivity is low, provide a kind of full-argon gas shielded arc welding to connect with flux-cored wire and preparation method thereof and application.
In order to solve above technical problem, technical scheme of the present invention is:
A medicinal powder for flux-cored wire, it comprises fusion penetration activating agent, and described fusion penetration activating agent is potassium permanganate, and the size distribution in medicinal powder is 74-297 micron.
Preferably, above-mentioned medicinal powder includes following component by mass percentage: C content is not more than 0.12%, Si content and is not more than 0.4%, Mn content is not more than 1.5%, and 0.35 ~ 0.6%Mo, S content is no more than 0.035%, P content is no more than 0.035%, 0 ~ 2.0%K
2cO
3powder, 0.5 ~ 1.5% potassium permanganate powder, surplus is Fe and does not inevitably have influential impurity to flux-cored wire performance.
Further preferred, the content of the content of C to be the content of 0.05% ~ 0.12%, Mn be 0.8 ~ 1.5%, Si is 0.2 ~ 0.4%.
In above-mentioned medicinal powder dusty material, the composition of potash is with mass ratio range K
2cO
3content is not less than 95%; Potassium permanganate is with mass ratio range KMnO
4content is not less than 99.3%.
The application in flux-cored wire prepared by above-mentioned medicinal powder.
A kind of full-argon gas shielded arc welding connects with flux-cored wire, comprises above-mentioned medicinal powder and the tube wall for wrapping up medicinal powder.
Preferably, the diameter of described flux-cored wire is 1.2-1.6mm.
Preferably, the cross sectional shape of described welding wire is annular.
Preferably, described tube wall is SPCC or H08A low-carbon steel material.
The preparation method of above-mentioned flux-cored wire, comprises the steps:
1) steel band of setting wall thickness and setting width is rolled, makes the shape of its cross section be U-shaped;
2) in the U-lag of the steel band of rolling, described medicinal powder is added;
3) U-lag is healed up, make medicinal powder package be rolled in U-lag, by drawing tube reducing, obtained flux-cored wire.
Preferably, step 1) in, the wall thickness of described steel band is 0.8-1.0mm, and width is 12-16mm; Or described steel band is SPCC steel band.
Preferably, step 2) in, the filling rate of U-lag traditional Chinese medicine powder is 10-15%.Filling rate is the ratio of medicinal powder quality and medicinal powder, steel band quality sum.
Preferably, step 3) in, the diameter after drawing tube reducing is 1.2-1.6mm.
The application of above-mentioned flux-cored wire in full-argon gas shielded arc welding, in argon-rich gas, Ar is 80%-95%, and surplus is oxygen or carbon dioxide.
In above-mentioned flux-cored wire, alloys producing is as follows:
When C content is less than 0.05%, in deposited metal, ratio of ferrite is higher, low strength, is unfavorable for the formation of acicular ferrite, and deposited metal intensity can be made more than 0.12% too high, and pearlite ratio increases, and is also unfavorable for ferritic a large amount of formation.Be mainly derived from iron alloy powder.
In Si deposited metal, si content controls below 0.4%, and increase Si more than 0.4% weld seam serious, toughness, the plasticity of butt welded seam are unfavorable, and therefore should control the Si amount in welding wire, Si is mainly derived from ferrosilicon powder.
Mn is the effective element of weld seam strengthening, when Mn content in weld seam lower than 0.8% time, weld strength is on the low side, needs to add the strengthening of other alloying elements; When Mn content in weld seam higher than 1.5% time, the low-temperature flexibility of weld metal obviously declines.Mn in welding process can deoxidation, desulfurization, reduction hot cracking tendency.Mn derives from manganese powder or ferromanganese powder.
S, P element Resistance of Weld Metal low-temperature flexibility have damaging effect, easily make weld seam crack, should reduce as far as possible, require that in flux-cored wire, S, P content is no more than 0.035% respectively.
Arc stabilizer: the effect of main stabilization electric arc, derives from K
2cO
3powder.
Fusion penetration activating agent: add potassium permanganate, increases the oxidisability of electric arc and liquid metal, makes weld pool surface form oxide, by affecting liquid state of molten pool metallic surface tension force, changing it and flowing to, being delivered to by arc heat bottom molten bath and increasing fusion penetration.The oxide of weld pool surface also makes conductive area reduce, arc constriction, increases fusion penetration.Addition lower than 0.5% time, oxidisability is more weak, increases the DeGrain of fusion penetration; When addition is more than 1.5%, oxidisability is excessive, weld seam oxygenation, and field trash increases, and reduces the toughness plasticity of weld metal.
Advantageous Effects of the present invention is:
(1) fusion penetration of flux-cored wire of the present invention is deep, so mother metal can without bevel, or only need out little groove, stay large root face, make to fill amount of metal and reduce, welding productivity is greatly improved.Also not easily produce incomplete fusion weld defect simultaneously, improve welded security.
(2) composition of deposited metal can be adjusted accordingly by the composition changing flux-cored wire medicinal powder, so can by the medicinal powder component of adjustment flux-cored wire, other steel of welding different intensity scale, make the range of application of flux-cored wire expand.
(3) argon-rich gas shielded increase fusion penetration flux-cored wire of the present invention can coiling disc forming, also can barrelling, is suitable for continuous automatic welding, particularly robot welding.
(4), during flux-cored wire welding of the present invention, adopt argon-rich gas shielded, welding arc stablility, splash little, welding quality is high, meanwhile, and the argon-rich gas shielded welding being also suitable for high-strength structure part.
Detailed description of the invention
Below in conjunction with detailed description of the invention, technical scheme of the present invention is described further.
Embodiment 1
(1) select wall thickness to be 0.9mm, width is the commercially available SPCC steel band of 16mm, and utilize existing flux-cored wire production line with after ultrasonic cleaning apparatus cleaning, being rolled into cross section along steel band length direction (longitudinal direction) is U-shaped.
The chemical composition (quality %) of SPCC steel band is, 0.06%C, 0.02%Si, 0.43%Mn, 0.012%S, 0.023%P.
(2) in above-mentioned U-shaped grain, medicinal powder is added, filling rate be 15% (filling rate is the ratio of medicinal powder quality and medicinal powder, steel band quality sum), wherein: the described medicinal powder dusty material that to be granularity be-297 microns+74 microns (i.e.-50 order+200 orders).
Above-mentioned powder chemistry composition is by mass percentage containing 0.05%C, 0.38%Si, 1.35%Mn, 0.02%S, 0.025%P, 1.0%K
2cO
3powder, 1.3% potassium permanganate powder, surplus is Fe and does not inevitably have influential impurity to flux-cored wire performance.
(3) healed up by U-lag, alloyed powder is wrapped up wherein, the position that heals up adopts docking connected mode; Touched by wire drawing, by road drawing, tube reducing, finally make its diameter reach 1.6mm.
(4) by the flux-cored wire coiling disc forming of step (3) gained, flux-cored wire product is obtained.
The flux-cored wire of the increase fusion penetration of more than obtained diameter 1.6mm, adopts 80%Ar+20%CO
2full-argon gas shielded arc welding, welding current 320A, arc voltage 35V, shield gas flow rate 25L/min, wire speed is 520mm/min.The mechanical property of deposited metal meets E49C-B2L (GB/T17493-2008 " low-alloy steel flux-cored wire "), and fusion penetration is 1.79 times of commercial metals powder type welding wire E49C-B2L.
Embodiment 2
(1) select wall thickness to be 0.8mm, width is the commercially available SPCC steel band of 12mm, and utilize existing flux-cored wire production line with after ultrasonic cleaning apparatus cleaning, being rolled into cross section along steel band length direction (longitudinal direction) is U-shaped.
The chemical composition (quality %) of SPCC steel band is, 0.08%C, 0.03%Si, 0.48%Mn, 0.015%S, 0.025%P.
(2) in above-mentioned U-shaped grain, medicinal powder is added, filling rate be 10% (filling rate is the ratio of medicinal powder quality and medicinal powder, steel band quality sum), wherein: the described medicinal powder dusty material that to be granularity be-297 microns+74 microns (i.e.-50 order+200 orders).
Above-mentioned powder chemistry composition is by mass percentage containing 0.10%C, 0.28%Si, 1.50%Mn, 0.025%S, 0.03%P, 1.5% potassium permanganate powder, and surplus is Fe and does not inevitably have influential impurity to flux-cored wire performance.
(3) healed up by U-lag, alloyed powder is wrapped up wherein, the position that heals up adopts docking connected mode; Touched by wire drawing, by road drawing, tube reducing, finally make its diameter reach 1.2mm.
(4) by the flux-cored wire coiling disc forming of step (3) gained, flux-cored wire product is obtained.
The flux-cored wire of the increase fusion penetration of more than obtained diameter 1.2mm, adopts 95%Ar+5%O
2full-argon gas shielded arc welding, welding current 260A, arc voltage 27V, shield gas flow rate 25L/min, wire speed is 500mm/min.The mechanical property of deposited metal meets E49C-B2L (GB/T17493-2008 " low-alloy steel flux-cored wire "), and fusion penetration is 1.65 times of commercial metals powder type welding wire E49C-B2L.
Embodiment 3
(1) select wall thickness to be 1.0mm, width is the commercially available SPCC steel band of 14mm, and utilize existing flux-cored wire production line with after ultrasonic cleaning apparatus cleaning, being rolled into cross section along steel band length direction (longitudinal direction) is U-shaped.
The chemical composition (quality %) of SPCC steel band is, 0.10%C, 0.05%Si, 0.50%Mn, 0.025%S, 0.029%P.
(2) in above-mentioned U-shaped grain, medicinal powder is added, filling rate be 13% (filling rate is the ratio of medicinal powder quality and medicinal powder, steel band quality sum), wherein: the described medicinal powder dusty material that to be granularity be-297 microns+74 microns (i.e.-50 order+200 orders).
Above-mentioned powder chemistry composition is by mass percentage containing 0.12%C, 0.40%Si, 1.25%Mn, 0.028%S, 0.032%P, 2.0%K
2cO
3powder, 0.5% potassium permanganate powder, surplus is Fe and does not inevitably have influential impurity to flux-cored wire performance.
(3) healed up by U-lag, alloyed powder is wrapped up wherein, the position that heals up adopts docking connected mode; Touched by wire drawing, by road drawing, tube reducing, finally make its diameter reach 1.4mm.
(4) by the flux-cored wire coiling disc forming of step (3) gained, flux-cored wire product is obtained.
The flux-cored wire of the increase fusion penetration of more than obtained diameter 1.4mm, adopts 90%Ar+10%CO
2full-argon gas shielded arc welding, welding current 290A, arc voltage 28V, shield gas flow rate 25L/min, wire speed is 500mm/min.The mechanical property of deposited metal meets E49C-B2L (GB/T17493-2008 " low-alloy steel flux-cored wire "), and fusion penetration is 1.47 times of commercial metals powder type welding wire E49C-B2L
Although above-mentioned, the specific embodiment of the present invention is described; but the restriction not to invention protection domain; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still in protection scope of the present invention.
Claims (10)
1. a medicinal powder for flux-cored wire, is characterized in that: it comprises fusion penetration activating agent, and described fusion penetration activating agent is potassium permanganate, and the size distribution in medicinal powder is 74-297 micron.
2. medicinal powder according to claim 1, it is characterized in that: described medicinal powder includes following component by mass percentage: C content is not more than 0.12%, Si content is not more than 0.4%, Mn content is not more than 1.5%, 0.35 ~ 0.6%Mo, S content is no more than 0.035%, P content and is no more than 0.035%, 0 ~ 2.0%K
2cO
3powder, 0.5 ~ 1.5% potassium permanganate powder, surplus is Fe and does not inevitably have influential impurity to flux-cored wire performance.
3. medicinal powder according to claim 2, is characterized in that: the content of the content of C to be the content of 0.05% ~ 0.12%, Mn be 0.8% ~ 1.5%, Si is 0.2% ~ 0.4%.
4. the application in flux-cored wire prepared by the arbitrary described medicinal powder of claim 2-3.
5. full-argon gas shielded arc welding connects with a flux-cored wire, it is characterized in that: comprise the arbitrary described medicinal powder of claim 2-3 and the tube wall for wrapping up medicinal powder.
6. flux-cored wire according to claim 5, is characterized in that: the diameter of described flux-cored wire is 1.2-1.6mm;
Or the cross sectional shape of described welding wire is annular.
7. flux-cored wire according to claim 5, is characterized in that: described tube wall is SPCC or H08A low-carbon steel material.
8. the preparation method of the flux-cored wire described in claim 6 or 7, is characterized in that: comprise the steps:
1) steel band of setting wall thickness and setting width is rolled, makes the shape of its cross section be U-shaped;
2) in the U-lag of the steel band of rolling, described medicinal powder is added;
3) U-lag is healed up, make medicinal powder package be rolled in U-lag, by drawing tube reducing, obtained flux-cored wire.
9. preparation method according to claim 8, is characterized in that:
Step 1) in, the wall thickness of described steel band is 0.4-1.0mm, and width is 12-16mm;
Or described steel band is SPCC steel band;
Or, step 2) in, the filling rate of U-lag traditional Chinese medicine powder is 10-15%.
Or, step 3) in, the diameter after drawing tube reducing is 1.2-1.6mm.
10. the application of flux-cored wire described in claim 6 or 7 in full-argon gas shielded arc welding, in argon-rich gas, Ar is 80%-95%, and surplus is oxygen or carbon dioxide.
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| CN105345313A (en) * | 2015-12-23 | 2016-02-24 | 山东大学 | High-strength flux-cored wire capable of increasing penetration as well as preparation method and application of flux-cored wire |
| CN111790966A (en) * | 2020-06-29 | 2020-10-20 | 华达汽车科技股份有限公司 | Automatic MAG welding process for threshold tubular beam and special welding wire thereof |
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