CN103737198B - A kind of stainless steel welded gas-shielded flux-cored wire - Google Patents

A kind of stainless steel welded gas-shielded flux-cored wire Download PDF

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Publication number
CN103737198B
CN103737198B CN201410016873.1A CN201410016873A CN103737198B CN 103737198 B CN103737198 B CN 103737198B CN 201410016873 A CN201410016873 A CN 201410016873A CN 103737198 B CN103737198 B CN 103737198B
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Prior art keywords
gas
cored wire
shielded flux
stainless steel
welding
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CN103737198A (en
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袁均山
赵佳
蒋勇
赵庆国
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SICHUAN ATLANTIC CHINA WELDING CONSUMABLES Inc
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SICHUAN ATLANTIC CHINA WELDING CONSUMABLES Inc
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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
    • 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
    • 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
    • B23K2103/04—Steel or steel alloys

Abstract

The invention provides a kind of stainless steel welded gas-shielded flux-cored wire, belong to field of welding material.Gas-shielded flux-cored wire provided by the invention, its medicine core comprises the component of following percentage by weight: Mn:1-6%; Si:0.1-5%; Cr:10-30%; Ni:5-25%; Na 2o and K 2the total amount of O: 1-10%; Fluoride: 0.1-2%; TiO 2: 15-30%; Surplus is Fe; The filling rate of described medicine core is 22-30%.Gas-shielded flux-cored wire provided by the invention, at pure CO 2condition under weld, the deposited metal after welding: tensile strength>=520Mpa, percentage elongation>=35%.And welding technological properties is good, arc stability, splash little, appearance of weld is attractive in appearance, adopts short circuiting transfer can realize vertical downward welding.

Description

A kind of stainless steel welded gas-shielded flux-cored wire
Technical field
The invention belongs to field of welding material, be specifically related to a kind of welding wire, particularly a kind of stainless steel welded gas-shielded flux-cored wire.
Background technology
In recent years, along with the fast development of economy, stainless steel industry is also developed faster.The strong growth of stainless steel consumption figure, will drive the quick growth in welding market: on the one hand, the quality progress of steel impels the update of stainless steel welding material; On the other hand, stainless steel welded efficient (automation) process obviously raises speed, and impels the breed structure readjustment paces of welding material to accelerate.
Compared with traditional stick electrode, copper plating solid core welding wire, submerged arc welding flux, adopt stainless flux-cored wire to carry out welding and there is obvious advantage, one, welding process is more continuous, and can realize automatic welding, thus decrease welding point, greatly improve production efficiency, be 3-4 times of manual electric arc welding, welding quality is good, save the energy, reduce integrated cost; Its two, there is not heating and redness phenomenon in stainless flux-cored wire, and it is minimum to splash, and weld seam light is silvery white in color, and postwelding does not generally need pickling, grinding and buffing; Its three, the medicinal powder in flux-cored wire is all through high bake temperature, and moisture is few, and do not need before welding to dry, stomata sensitivity is lower.So stainless flux-cored wire is widely used in the industries such as shipbuilding, petrochemical industry, pressure vessel, steel construction and engineering machinery.
Therefore, along with quick, stable, the sustainable development of economy, the demand of market to stainless steel material increases fast, also increasing to the demand of stainless flux-cored wire, develop, develop a kind of flux core welding wire supporting with stainless steel, when making it meet low cost, also have that welding technological properties is good, arc stability, splashing is little, appearance of weld is attractive in appearance feature, be very important research topic.
Summary of the invention
A stainless steel welded gas-shielded flux-cored wire, comprise stainless steel crust and medicine core, it is characterized in that, described medicine core comprises the component of following percentage by weight:
Mn:1-6%; Si:0.1-5%; Cr:10-30%; Ni:5-25%; Na 2o and K 2the total amount of O: 1-10%; Fluoride: 0.1-2%; TiO 2: 15-30%; Fe: surplus;
The filling rate of described medicine core is 22-30%.
Preferably, described Si joins in medicine core with the form of ferrosilicon.
Preferably, described fluoride is one or more the combination in sodium fluoride, prodan, potassium fluosilicate and cryolite.
Preferably, described TiO 2join in medicine core with the form of natural rutile.
Preferably, described stainless steel crust comprises the component of following percentage by weight:
C:0.01-0.1%; Mn:0.5-1.5%; Si:0.1-1%; S:0.005-0.015%; P:0.005-0.035%; Cr:15-25%; Ni:5-15%; Fe: surplus.
Preferably, the thickness of described stainless steel crust is 0.3-0.5mm.
Preferably, the diameter of described gas-shielded flux-cored wire is 1.0-1.6mm.
Preferably, described gas-shielded flux-cored wire is at CO 2protection gas under weld.
Design of the present invention is as follows:
Manganese metal: manganese is important deoxidier is also simultaneously the important alloying constituent of weld metal.Intensity and the toughness of Resistance of Weld Metal have material impact.Manganese can reduce austenite to ferrite transformation temperature, promotes that ferrite strengthened by AF(pin) formed.Fe content increase can improve the low-temperature impact toughness of weld seam, but then contrary time too high.The Ratio control of Mn and Si is at 3-8 simultaneously.Manganese can also form MnS with sulphur, reduces the impurity content of weld seam.Test of many times determine Mn content about (1-6%) time performance better.
Ferrosilicon: the alloying constituent that silicon to be important deoxidier be also simultaneously weld metal is important.Silicon can reduce the oxygen content of weld metal, improves the impact flexibility of weld metal, but then contrary time too high.Adopt silicomanganese combined deoxidation, test of many times determines Si content better performances when (0.1-5%).
Magnesium powder: magnesium is strong deoxidier, playing an important role to controlling the oxygen content of weld metal, can play the effect of stabilising arc simultaneously, but can increase weld fumes during its too high levels and be unfavorable for that welder is healthy.It is good that its content controls the performance when (0.1-5%).
Crome metal: chromium is conventional alloying constituent, chromium is medium carbide former, and in all various carbide, chromium carbide is the most tiny one, and it can be evenly distributed in steel volume, plays the left and right of crystal grain thinning.Have under short time heating and hinder grain growth effect, so overheated sensitlzing effect can be reduced.It is good that the ratio that crome metal accounts for medicine core controls the performance when 10-30%.
Nickel powder: nickel can significantly improve weld metal intensity, has the effect of crystal grain thinning, can reduce the overheated tendentiousness of steel, improves intensity, hardness, heat endurance.Reduce temper brittleness, but too highly can affect weld metal toughness.In order to control the nickel content being transitioned into weld metal, it is good that nickel powder controls the performance when (5-25%).
Na 2o, K 2o: as the arc stabilizer in formula.Main from K 2tiO 3, K 2siO 3, Na 2siO 3, albite and potassic feldspar.Na 2o, K 2o increase, arc stability increase, in spray transfer, droplet size reduce, arcing sounds improves.Control the performance when (1-10%) good.
Fluoride: select the one in sodium fluoride, prodan, potassium fluosilicate, oryolite and multiple.Reduce the diffusible hydrogen content of deposited metal.Too high levels, electric arc is unstable, splashing becomes large, arcing sounds is deteriorated.When controlling ratio (0.5-2%) of fluoride, performance is good.
Natural rutile: natural rutile is conventional slag former and arc stabilizer, main component is TiO 2, content is more, and electric arc is more stable.When natural rutile ratio is (15-30%), performance is good.
Iron powder: improve welding efficiency and provide a small amount of oxygen for stabilising arc.In order to ensure high deposition efficiency, iron powder controls in (surplus).
Compared with the prior art, the invention has the beneficial effects as follows:
1. with the deposited metal after gas-shielded flux-cored wire welding provided by the invention: tensile strength >=550Mpa, percentage elongation >=43%.And welding technological properties is good, arc stability, splash little, appearance of weld is attractive in appearance, adopts short circuiting transfer can realize vertical downward welding.
2. this invention preparation technology of welding wire is simple, alloy system is reasonable in design, and welding wire integrated cost is low.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
embodiment 1
Select the steel band of 10mm × 0.4mm, the phosphorus of the silicon of the carbon of its chemical composition (by weight percentage) 0.01-0.1%, the manganese of 0.5-1.5%, 0.1-1%, the sulphur of 0.005-0.015%, 0.005-0.035%, the chromium of 15-25%, the nickel of 5-15%, surplus are iron, medicine core composition percentage, medicine core accounts for 25% of welding wire weight, and the mass percent of medicine core composition is wherein the electrolytic manganese of 6%, ferrosilicon, the magnesium powder of 0.4%, crome metal, the nickel powder of 16%, the Na of 6% of 18% of 0.6% 2o, K 2o, 0.8% fluoride, 24% natural rutile, surplus iron powder.Welding parameter: I=200-220A, U=30-32V, gas flow 20L/min, pure CO 2gas.
Deposited metal composition (count by weight percentage, surplus is Fe) sees the following form:
C Mn Si S P Cr Ni
0.025 1.33 0.50 0.002 0.012 18.78 9.67
Deposited metal mechanical performance (pure CO 2gas) see the following form:
embodiment 2
Select the steel band of 10mm*0.4mm, the silicon of the carbon of its chemical composition (by weight percentage) 0.01-0.1%, the manganese of 0.5-1.5%, 0.1-1%, the sulphur of 0.005-0.015%, the phosphorus of 0.005-0.035%, the chromium of 15-25%, the nickel of 5-15%, the iron of surplus, medicine core composition percentage, medicine core accounts for 25% of welding wire weight, and medicine core composition mass percent is wherein the electrolytic manganese of 5.4%, ferrosilicon, the magnesium powder of 0.3%, crome metal, the nickel powder of 17%, the Na of 6% of 18% of 0.5% 2o, K 2o, 0.8% fluoride, 24% natural rutile, surplus iron powder.Welding parameter: I=200-220A, U=30-32V, gas flow 20L/min, pure CO 2gas.
Deposited metal composition (count by weight percentage, surplus is Fe) sees the following form:
C Mn Si S S P Cr Ni
0.022 1.30 0.52 0.002 0.012 18.87 10.08
Deposited metal mechanical performance (pure CO 2gas) see the following form:
embodiment 3
Select the steel band of 10mm*0.4mm, the silicon of the carbon of its chemical composition (by weight percentage) 0.01-0.1%, the manganese of 0.5-1.5%, 0.1-1%, the sulphur of 0.005-0.015%, the phosphorus of 0.005-0.035%, the chromium of 15-25%, the nickel of 5-15%, the iron of surplus, medicine core composition percentage, medicine core accounts for 25% of welding wire weight, and medicine core composition mass percent is wherein the electrolytic manganese of 7%, ferrosilicon, the magnesium powder of 0.3%, crome metal, the nickel powder of 17%, the Na of 6% of 18% of 0.6% 2o, K 2o, 0.8% fluoride, 24% natural rutile, surplus iron powder.Welding parameter: I=200-220A, U=30-32V, gas flow 20L/min, pure CO 2gas.
Deposited metal composition (count by weight percentage, surplus is Fe) sees the following form:
C Mn Si S P Cr Ni
0.022 1.50 0.51 0.002 0.012 18.86 9.82
Deposited metal mechanical performance (pure CO 2gas) see the following form:

Claims (8)

1. a stainless steel welded gas-shielded flux-cored wire, comprise stainless steel crust and medicine core, it is characterized in that, described medicine core comprises the component of following percentage by weight:
Mn:1-6%; Si:0.1-5%; Cr:10-30%; Ni:5-25%; Na 2o and K 2the total amount of O: 1-10%; Fluoride: 0.1-2%; TiO 2: 15-30%; Fe: surplus;
The filling rate of described medicine core is 22-30%.
2. gas-shielded flux-cored wire according to claim 1, is characterized in that, described Si joins in medicine core with the form of ferrosilicon.
3. gas-shielded flux-cored wire according to claim 1, is characterized in that, described fluoride is one or more the combination in sodium fluoride, prodan, potassium fluosilicate and cryolite.
4. gas-shielded flux-cored wire according to claim 1, is characterized in that, described TiO 2join in medicine core with the form of natural rutile.
5. gas-shielded flux-cored wire according to claim 1, is characterized in that, described stainless steel crust comprises the component of following percentage by weight:
C:0.01-0.1%; Mn:0.5-1.5%; Si:0.1-1%; S:0.005-0.015%; P:0.005-0.035%; Cr:15-25%; Ni:5-15%; Fe: surplus.
6. gas-shielded flux-cored wire according to claim 1, is characterized in that, the thickness of described stainless steel crust is 0.3-0.5mm.
7. the gas-shielded flux-cored wire according to any one of claim 1-6, is characterized in that, the diameter of described gas-shielded flux-cored wire is 1.0-1.6mm.
8. gas-shielded flux-cored wire according to claim 1, is characterized in that, described gas-shielded flux-cored wire is at CO 2protection gas under weld.
CN201410016873.1A 2014-01-15 2014-01-15 A kind of stainless steel welded gas-shielded flux-cored wire Active CN103737198B (en)

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CN105269176B (en) * 2015-11-20 2017-12-12 四川大西洋焊接材料股份有限公司 Gas shielded flux cored wire for the steel of resistance to cargo tank corrosion and preparation method thereof
CN107877033B (en) * 2016-09-30 2020-03-31 天津沃盾耐磨材料有限公司 Flux-cored wire and preparation method thereof
CN106514040B (en) * 2016-11-04 2019-07-26 四川大西洋焊接材料股份有限公司 A kind of gas shielded stainless flux-cored wire and its production technology for boiler-burner
CN107030413B (en) * 2017-04-12 2019-04-12 广东省焊接技术研究所（广东省中乌研究院） A kind of flux-cored wire suitable for slab high-strength steel narrow-clearance submerged arc welding
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CN112404793B (en) * 2020-10-08 2022-03-15 武汉科技大学 Seamless flux-cored wire for welding low-nitrogen non-magnetic naval vessel steel
CN112388202B (en) * 2020-12-01 2022-06-24 四川大西洋焊接材料股份有限公司 Welding wire flux core, welding wire, preparation method of welding wire and welding method
CN115194362A (en) * 2021-04-12 2022-10-18 天津市金桥焊材集团股份有限公司 Low-smoke 55-kilogram-level weather-resistant flux-cored wire
CN114055013B (en) * 2021-11-26 2023-06-27 四川大西洋焊接材料股份有限公司 Welding wire powder core, flux-cored wire and preparation method and application thereof
CN115255712B (en) * 2022-04-11 2024-04-26 江苏东南焊材有限公司 Stainless steel self-protection flux-cored wire

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US5099103A (en) * 1989-12-08 1992-03-24 Kabushiki Kaisha Kobe Seiko Sho Flux-cored wire for gas shielded arc welding
JP2005186138A (en) * 2003-12-26 2005-07-14 Kobe Steel Ltd Metal based flux-containing wire for gas-shielded arc welding, and gas shielded arc welding method
CN101323057A (en) * 2007-06-13 2008-12-17 中国船舶重工集团公司第七二五研究所 High intensity metallic core type seamless flux-cored wire
CN102430877A (en) * 2011-11-04 2012-05-02 武汉铁锚焊接材料股份有限公司 Metal powder type flux-cored wire and preparation and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5099103A (en) * 1989-12-08 1992-03-24 Kabushiki Kaisha Kobe Seiko Sho Flux-cored wire for gas shielded arc welding
JP2005186138A (en) * 2003-12-26 2005-07-14 Kobe Steel Ltd Metal based flux-containing wire for gas-shielded arc welding, and gas shielded arc welding method
CN101323057A (en) * 2007-06-13 2008-12-17 中国船舶重工集团公司第七二五研究所 High intensity metallic core type seamless flux-cored wire
CN102430877A (en) * 2011-11-04 2012-05-02 武汉铁锚焊接材料股份有限公司 Metal powder type flux-cored wire and preparation and application thereof

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