CN101112737A - High-strength welding wire for CO2 gas shielded arc welding - Google Patents
High-strength welding wire for CO2 gas shielded arc welding Download PDFInfo
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- CN101112737A CN101112737A CNA2007100530506A CN200710053050A CN101112737A CN 101112737 A CN101112737 A CN 101112737A CN A2007100530506 A CNA2007100530506 A CN A2007100530506A CN 200710053050 A CN200710053050 A CN 200710053050A CN 101112737 A CN101112737 A CN 101112737A
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Abstract
A high-strength CO2 gas protection welding wire belongs to a welding wire which carries out the alloying to the alloy element. Aiming at the shortages of prior gas protection welding wire of high cost, low tensile strength and low impact tenacity of the welding seam metal, the invention provides the gas protection welding wire with the chemical composition weight percentage of C:0.08-0.15, Si:0.50-1.0, Mn:1.30-2.00, P is less than or equal to 0.025, S is less than or equal to 0.020, Cr:0.40-0.80, Cu:0.10-0.60, Ti:0.05-0.15, B:0.002-0.010, Als:0.002-0.03, and the allowance is the Fe. The invention has the advantages of reducing the cost of the welding wire, improving the tensile strength and the impact tenacity of the welding seam metal, reducing the splashing when welding and being beneficial for the generalization and application.
Description
Technical field
The present invention relates to a kind of high-strength CO
2Gas protecting welding wire, alloying elements such as specifically a kind of Cr of employing, Cu carry out the welding wire of alloying.
Background technology
Gas shielded arc welding has the production efficiency height, adapt to all-position welding, be convenient to realize characteristics such as automation welding production, has been widely used in industries such as shipbuilding, engineering machinery, petrochemical industry, automobile making, oil pipeline.The gas of developed country guarantor weldering ratio has reached more than 30% at present, and the ratio that China's gas is protected weldering is also progressively rising, and the gas shield welding wire consumption is very big.
The protective gas of gas protecting welding wire generally is divided into CO
2With rich argon, rich argon is again with 20%CO
2+ 80%Ar is main.In general, CO
2Low and the relative environmental protection of gas cost, CO
2Gas is protected weldering welding efficiency height, if but the component of weld wire design is improper, and cause spatter big easily, weld metal impact flexibility is not good.
In order to reduce production costs, improve working condition, for the production of most ordinary steel structures or engineering goods, the user wishes to adopt more lower-cost CO
2Protective gas and welding wire, and require to have good welding technological properties, weld properties (mainly being weld strength and impact flexibility) also needs to satisfy certain technical conditions requirement.
For high-strength gas protecting welding wire, people often concentrate on sight and improve on the welding seam toughness, thereby more to the argon-rich gas shielded welding wire concern, CO among the GB GB/T8110
2Welding wire is of less types, mainly contains ER49, ER50, ER55 series and ER69-3.ER49, ER50 are 500MPa level welding wire, belong to solid wire.ER55 and ER69-3 contain higher Mo, and ER69-3 also contains higher Ni, though weld seam has better strength and toughness, cost also rises significantly.And what tensile strength was higher than 600MPa has only kind of ER69-3.
For a long time, people are a kind of main alloy element of Ni as the weld seam malleableize, so often add the Ni of high level in these high-intensity high-tenacity gas shield welding wires.When Ni cost in the past was low, Ni alloying a kind of effective way of can yet be regarded as, but along with the Ni valency is multiplied, the user's of these welding wires burden also is multiplied was unfavorable for applying and the development of relevant enterprise of welding wire.In the existing gas shield welding wire, Mo is main intensified element, but the cost of Mo is equally very high.
Technologies such as welding wire adopt to be smelted, wire rod is rolling, drawing and copper coating are made.Generally contain higher Si and Mn in the gas shield welding wire, can adopt Mn iron and the deoxidation of Si iron during smelting.Other alloying element such as Ni, Mo, Cr, Cu etc. also control during smelting easily owing to little with the affinity of oxygen.Microelement Ti, B, Als etc. and gas content according to welding wire designing requirement controlled, be the difficult point that welding wire steel is smelted.Improve the strand proportion of equiaxed grain and can reduce the fragility of strand and the segregation of alloying element, thereby improve the uniformity and the performance of wire rod metallographic structure, improve the drawing property of wire rod.Gage of wire is generally 1.2mm, and 1.6mm and 0.8mm are also arranged.For the not high welding wire of intensity, Φ 5.5mm wire rod can directly be drawn into the welding wire of Φ 1.2mm, for the higher welding wire of intensity, need carry out one or many heat treatment in the drawing process.Carry out Electroless copper or plating at last.
Summary of the invention
The present invention is directed to existing gas protecting welding wire cost height, spatter is big, and weld metal tensile strength, the drawback that impact flexibility is low provide a kind of high-strength CO
2Gas protecting welding wire.The present invention has reduced the cost of welding wire, has improved weld metal tensile strength, impact flexibility.
The present invention is achieved by the following technical programs:
A kind of high-strength CO
2Gas protecting welding wire; the chemical component weight percentage of described welding wire is: C:0.08～0.15, Si:0.50～1.0, Mn:1.30～2.00; P≤0.025; S≤0.020, Cr:0.40～0.80, Cu:0.10～0.60; Ti:0.05～0.15; B:0.002～0.010, Als:0.002～0.03, surplus is Fe.
The main alloying principle of above-mentioned welding wire is: (1) is main intensified element with Mn, Si, Cr and Cu element, and these elements all can improve the hardenability of weld metal, and Cr, Cu also help the refinement weld grain, guarantees the obdurability of weld seam.Cu content can improve welding seam toughness within the specific limits the time.(2) Ti, the B that adds trace in welding wire can improve acicular ferrite content in the weld seam, and suppresses the generation of grain boundary ferrite.(3) in welding wire, add an amount of Si, Mn as deoxidant element, can reduce the oxygen content in the weld seam, improve the welding wire welding technological properties.(4) content of Als in the control welding wire, and make that the Ti/Als value is higher than 1 in the weld seam, can improve the toughness of weld seam.
The present invention has the following advantages:
Adopt C, Mn, Cr and Cu element to realize the reinforcement of weld seam, the control content of elements makes weld seam obtain further malleableize, and experiment showed, and adopt welding wire of the present invention that the tensile strength of weld metal has been reached more than the 590Mpa, and at CO
2Splashing when welding can reduce welding in the protective atmosphere; Owing to do not contain Ni and Mo in the composition, therefore also have the low advantage of cost.
Welding wire of the present invention can adopt conventional wire rod smelting, rolling and drawing welding wire technology preparation, has easy realization, process stabilizing, the stable advantage of lumber recovery, therefore is beneficial to and applies.
The specific embodiment
Present embodiment provides a kind of high-strength CO
2Gas protecting welding wire, this welding wire and the distinctive points of existing welding wire are that composition and part by weight are different, and its production method and existing welding wire are as broad as long, that is to say, the method for making welding wire in the prior art can be applied to the manufacturing to this patent welding wire.
Welding wire chemical component weight percentage provided by the invention is: C:0.08～0.15, Si:0.50～1.0, Mn:1.30～2.00, Cr:0.40～0.80, Cu:0.10～0.60, Ti:0.05～0.15, B:0.002～0.010, Als:0.002～0.03, surplus is Fe.
The manufacture method of the described welding wire of present embodiment is as follows:
Modes such as (1) converter, electric furnace or Medium frequency induction are carried out the smelting of steel, and select for use low S, P steel scrap to carry out welding wire steel and smelt, wherein, P≤0.025, S≤0.020.
(2) casting ingot-forming and be rolled into square billet or directly continuous casting become square billet, improve the strand proportion of equiaxed grain as far as possible, and reduce the segregation of alloying element.
(3) billet rolling becomes wire rod, and wire rod intensity helps improving its drawing property when low.
(4) wire rod is drawn into welding wire and copper coating, can improve the copper facing quality when reducing the intensity of silk self.
The impact analysis of the various main alloy element butt welded seam metallicities in the above-mentioned welding wire is as follows.
The obdurability of C butt welded seam has bigger influence, but C is more active, and test shows, when C in the welding wire≤0.15%, at CO
2During than the strong oxidizing property gas shield, the transfer coefficient of C from the welding wire to the weld seam is about 0.7～0.8.
Si, Mn are deoxidant elements, and butt welded seam also has invigoration effect, and the Mn in the weld seam is 1.0～1.4% o'clock simultaneously, can improve welding seam toughness.The transfer coefficient of Si, Mn two elements generally has only 0.4～0.6.
Cr is one of the most effective intensified element, and the effect of refinement ferrite crystal grain is arranged, and performance maintained higher level after it also helped to keep weld seam heat treatment.
Cu content is lower than 0.5% o'clock butt welded seam and plays solution strengthening in the weld seam, and can improve welding seam toughness.The transfer coefficient of Cr, Cu two elements is about 0.9.
The effect of Ti, B element mainly provides the heterogeneous body forming core core of the following acicular ferrite of the about 0.6 μ m of diameter, promotes the formation of fine acicular ferrite and inhibition grain boundary ferrite.In the control weld seam Ti/Als 〉=1 can effectively avoid in the weld seam forming comparatively thick (diameter is more than the 1.5 μ m), be unfavorable for toughness contain the Al particle.
With the weld strength is target, has determined the chemical composition of welding wire as previously mentioned, experiment showed, described composition welding wire can reach above-mentioned Weld Performance requirement fully.
Embodiment 1
Adopt the 50kg intermediate frequency furnace to smelt, its intrinsic function composite by electromagnetic stirring generally speaking helps improving the quality of steel.Select for use low S, P steel scrap to carry out welding wire steel and smelt, Cu allocates at when filling with substance, and Cr added in refining period, and active trace element adds in the later stage or in ladle.Smelt and adopt Si iron and the deoxidation of Mn iron, and strict control trace element and gas content, smelting process there are not other specific (special) requirements, casting ingot-forming.
Rolling from Ingot is made square billet, and square billet is gone into and is incubated half an hour after stove is warming up to 1200 ℃, is rolled into Φ 6.5mm wire rod.Through peel off, pickling, heat treatment once is drawn into the silk that specification is Φ 1.2mm at last when being drawn to Φ 3.2mm, Electroless copper is after pressing mold is made welding wire.
The chemical component weight percentage of described welding wire is: C 0.11, Si 0.65, Mn 1.75, P 0.015, S 0.010, Cr 0.55, Cu 0.30, Ti 0.11, B 0.005, Als0.022, O, N are respectively less than 70ppm, and surplus is Fe.
Carry out CO by GB/T8110
2Welding deposited metal performance test, the welding technological properties and the deposited metal mechanical property of research welding wire.
For high strength CO
2Gas shield welding wire, GB regulation 690MPa level welding wire-20 ℃ ballistic work (A
Kv) 〉=35J, 550MPa level welding wire-30 ℃ ballistic work (A
Kv) 〉=27J.The present invention adopts CO
2When protection was welded, welding technological properties was good; The mechanical property of deposited metal is seen below table.
Embodiment 2
The difference of present embodiment and embodiment 1 is that the chemical component weight percentage of described welding wire is: C:0.09, and Si:0.60, Mn:1.60, Cr:0.50, Cu:0.30, Ti:0.08, B:0.002, Als:0.002, surplus is Fe.The mechanical property of deposited metal is seen below table.
Embodiment 3
The difference of present embodiment and embodiment 1 is that the chemical component weight percentage of described welding wire is: C:0.13, and Si:0.80, Mn:1.90, Cr:0.70, Cu:0.50, Ti:0.12, B:0.010, Als:0.03, surplus is Fe.The mechanical property of deposited metal is seen below table.
Embodiment 4
The difference of present embodiment and embodiment 1 is that the chemical component weight percentage of described welding wire is: C:0.08, and Si:1.0, Mn:1.30, P≤0.025, S≤0.020, Cr:0.80, Cu:0.10, Ti:0.15, B:0.002, Als:0.03, surplus is Fe.The mechanical property of deposited metal is seen below table.
Embodiment 5
The difference of present embodiment and embodiment 1 is that the chemical component weight percentage of described welding wire is: C:0.15, Si:0.50, Mn:2.00, P≤0.025, S≤0.020, Cr:0.40, Cu:0.60, Ti:0.05, B:0.010, Als:0.002, surplus is Fe.The mechanical property of deposited metal is seen below table.
Embodiment 6
The difference of present embodiment and embodiment 1 is that the chemical component weight percentage of described welding wire is: C:0.11, Si:0.90, Mn:1.70, P≤0.025, S≤0.020, Cr:0.80, Cu:0.20, Ti:0.06, B:0.009, Als:0.003, surplus is Fe.The mechanical property of deposited metal is seen below table.
Embodiment 7
The difference of present embodiment and embodiment 1 is that the chemical component weight percentage of described welding wire is: C:0.14, Si:0.70, Mn:1.40, P≤0.025, S≤0.020, Cr:0.60, Cu:0.40, Ti:0.09, B:0.006, Als:0.01, surplus is Fe.The mechanical property of deposited metal is seen below table.
Embodiment 8
The difference of present embodiment and embodiment 1 is that described welding wire chemical component weight percentage is: C0.09, and Si0.90, Mn1.90, Cr0.75, Ti0.13, B0.003, Cu0.45, Als0.015, surplus is Fe, O, N are respectively less than 70ppm.Use CO
2Make protection gas.The mechanical property of deposited metal is seen below table.
Embodiment 9
The difference of present embodiment and embodiment 1 is that described welding wire chemical component weight percentage is: C0.14, and Si0.70, Mn1.60, Cr0.65, Ti0.08, B0.007, Cu0.25, Als0.005, surplus is Fe, O, N are respectively less than 70ppm.Use CO
2Make protection gas.The mechanical property of deposited metal is seen below table.
| Yield strength (R eL)/MPa | Tensile strength (Rm)/MPa | Percentage elongation (A)/% | The contraction percentage of area (Z)/% | -20 ℃ of ballistic work (A kv)/J | -30 ℃ of ballistic work (A kv)/J | -40 ℃ of ballistic work (A kv)/J | |
| Embodiment 1 | ?506 | ?630 | ?24 | ?70 | ?104 | ?88 | ?69 |
| Embodiment 2 | ?525 | ?625 | ?24 | ?60 | ?95 | ?90 | ?60 |
| Embodiment 3 | ?540 | ?610 | ?25 | ?65 | ?110 | ?70 | ?70 |
| Embodiment 4 | ?535 | ?595 | ?24 | ?75 | ?108 | ?78 | ?66 |
| Embodiment 5 | ?542 | ?660 | ?23 | ?72 | ?100 | ?85 | ?58 |
| Embodiment 6 | ?510 | ?635 | ?24 | ?68 | ?98 | ?95 | ?72 |
| Embodiment 7 | ?552 | ?655 | ?22 | ?67 | ?90 | ?91 | ?65 |
| Embodiment 8 | ?545 | ?650 | ?23 | ?60 | ?93 | ?87 | ?61 |
| Embodiment 9 | ?550 | ?660 | ?22 | ?62 | ?88 | ?85 | ?56 |
Claims (3)
1. high-strength CO
2Gas protecting welding wire; the chemical component weight percentage that it is characterized in that described welding wire is: C:0.08～0.15, Si:0.50～1.0, Mn:1.30～2.00; P≤0.025; S≤0.020, Cr:0.40～0.80, Cu:0.10～0.60; Ti:0.05～0.15; B:0.002～0.010, Als:0.002～0.03, surplus is Fe.
2. high-strength CO according to claim 1
2Gas protecting welding wire; the chemical component weight percentage that it is characterized in that described welding wire is: C:0.09～0.13; Si:0.60～0.80; Mn:1.60～1.90, Cr:0.50～0.70, Cu:0.30～0.50; Ti:0.08～0.12; B:0.002～0.010, Als:0.002～0.03, surplus is Fe.
3. high-strength CO according to claim 1
2Gas protecting welding wire; the chemical component weight percentage that it is characterized in that described welding wire is: C:0.11～0.14, Si:0.70～0.90, Mn:1.40～1.70; P≤0.025; S≤0.020, Cr:0.60～0.80, Cu:0.20～0.40; Ti:0.06～0.09; B:0.006～0.009, Als:0.003～0.01, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100530506A CN100491056C (en) | 2007-08-28 | 2007-08-28 | High-strength CO2 gas welding wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100530506A CN100491056C (en) | 2007-08-28 | 2007-08-28 | High-strength CO2 gas welding wire |
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| CN101112737A true CN101112737A (en) | 2008-01-30 |
| CN100491056C CN100491056C (en) | 2009-05-27 |
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248324A (en) * | 2011-06-27 | 2011-11-23 | 武汉钢铁(集团)公司 | CO2 gas shield welding wire capable of reducing welding spatter |
| CN101704170B (en) * | 2009-11-03 | 2012-01-18 | 武汉钢铁(集团)公司 | High-toughness gas shielded welding wire and preparation method and use method thereof |
| CN101493448B (en) * | 2008-12-17 | 2013-06-26 | 武汉钢铁(集团)公司 | Prediction method for efficiency of welded joint by 550-850MaPa gas shielded welding |
| CN110773902A (en) * | 2018-07-30 | 2020-02-11 | 宝山钢铁股份有限公司 | Economical CO suitable for ultralow heat input automatic welding 2Gas shielded welding wire and manufacturing method |
| CN111015015A (en) * | 2019-10-22 | 2020-04-17 | 上海大西洋焊接材料有限责任公司 | Low-alloy steel gas shielded welding wire for welding 60 Kg-grade steel plate |
| CN117484012A (en) * | 2023-12-13 | 2024-02-02 | 西安钢研功能材料股份有限公司 | Invar alloy welding wire and preparation and welding methods thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1254348C (en) * | 2002-01-31 | 2006-05-03 | 杰富意钢铁株式会社 | Steel wire for carbon dioxide shielded arc welding and welding process asing the same |
| CN1290661C (en) * | 2004-06-25 | 2006-12-20 | 武汉钢铁(集团)公司 | High strength high tenacity high weather resistant gas protecting welding wire |
| CN100460135C (en) * | 2007-03-30 | 2009-02-11 | 沈阳航空工业学院 | Gas protected welding wire in 600 MPa level |
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2007
- 2007-08-28 CN CNB2007100530506A patent/CN100491056C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493448B (en) * | 2008-12-17 | 2013-06-26 | 武汉钢铁(集团)公司 | Prediction method for efficiency of welded joint by 550-850MaPa gas shielded welding |
| CN101704170B (en) * | 2009-11-03 | 2012-01-18 | 武汉钢铁(集团)公司 | High-toughness gas shielded welding wire and preparation method and use method thereof |
| CN102248324A (en) * | 2011-06-27 | 2011-11-23 | 武汉钢铁(集团)公司 | CO2 gas shield welding wire capable of reducing welding spatter |
| CN110773902A (en) * | 2018-07-30 | 2020-02-11 | 宝山钢铁股份有限公司 | Economical CO suitable for ultralow heat input automatic welding 2Gas shielded welding wire and manufacturing method |
| CN111015015A (en) * | 2019-10-22 | 2020-04-17 | 上海大西洋焊接材料有限责任公司 | Low-alloy steel gas shielded welding wire for welding 60 Kg-grade steel plate |
| CN117484012A (en) * | 2023-12-13 | 2024-02-02 | 西安钢研功能材料股份有限公司 | Invar alloy welding wire and preparation and welding methods thereof |
| CN117484012B (en) * | 2023-12-13 | 2024-06-21 | 西安钢研功能材料股份有限公司 | Invar alloy welding wire and preparation and welding methods thereof |
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| CN100491056C (en) | 2009-05-27 |
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