CN101913035B - High-tenacity gas shielded welding wire for welding low-temperature steel and using method thereof - Google Patents

High-tenacity gas shielded welding wire for welding low-temperature steel and using method thereof Download PDF

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CN101913035B
CN101913035B CN2010102628341A CN201010262834A CN101913035B CN 101913035 B CN101913035 B CN 101913035B CN 2010102628341 A CN2010102628341 A CN 2010102628341A CN 201010262834 A CN201010262834 A CN 201010262834A CN 101913035 B CN101913035 B CN 101913035B
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welding wire
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gas shielded
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CN101913035A (en
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关常勇
国旭明
张金生
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Shandong Solid Solder Co ltd
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SHANDONG SOLDER WELDING MATERIAL CO Ltd
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Abstract

The invention provides a high-tenacity gas shielded welding wire for welding low-temperature steel, which is suitable for welding the low-temperature steel subjected to service in the environment of over minus 60 DEG C. The gas shielded welding wire comprises the following chemical components in percentage by mass: 0.04 to 0.10 percent of C, 0.20 to 0.60 percent of Si, 1.20 to 1.60 percent of Mn,1.5 to 2.0 percent of Ni, 0.10 to 0.30 percent of Mo, 0.02 to 0.10 percent of Ti, 0.02 to 0.08 percent of Zr, less than or equal to 0.010 percent of S, less than or equal to 0.010 percent of P, less than or equal to 0.0025 percent of O, less than or equal to 0.0070 percent of N, and the balance of Fe and inevitable impurities. The welding wire welds by adopting Ar + 20%CO2 full-argon gas shielding so a weld metal has high low-temperature tenacity in a welding state and under a heat treatment condition after welding.

Description

A kind of high-tenacity gas shielded welding wire for welding low-temperature steel and method for using thereof
Technical field
The invention belongs to field of welding material, it is higher to be specially a kind of Ni content, the high-ductility gas shielded welding wire and the method for using thereof of Ti, Zr microalloying.
Background technology
Along with Welding Structure under low temperature environment, be on active service and use increasingly extensive, all need under low temperature environment, use like low-temperature pressure container, gas transmission line, petrochemical equipment, freezing equipment, food industry and liquid gas storage facilities etc.Therefore, the ability that requires this type of steel to have enough low-temperature flexibilities and high anti-low temperature brittleness is an overriding concern.This will be to the low-temperature flexibility of welding point, and then welding material and welding procedure are had higher requirement.Yet it is few in existing technology, can to satisfy the gas protecting welding wire that on low temperature environment military service equipment more than-60 ℃, uses.
The at present disclosed solid core welding wire that is used for the low-temperature steel welding mainly contains Chinese invention patent has two.A kind of welding wire is owing to S, P content are higher, and ni content is lower, can not satisfy the low-temperature flexibility requirement of weld metal under-60 ℃ of environment; Another kind of welding wire belongs to submerged-arc welding wire, needs the corresponding solder flux of coupling could satisfy the low-temperature flexibility requirement of weld seam, so can not be as the welding material of gas shielded arc welding.
Summary of the invention
The gas protecting welding wire and the method for using thereof that the object of the present invention is to provide a kind of low-temperature steel that is suitable for being on active service to weld at environment more than-60 ℃; C, S, P, O content have been controlled in the welding wire strictness; Add Ti, the Zr element of an amount of Ni element and trace; And adopt argon-rich gas shielded welding, make deposited metal have the ability of good low-temperature flexibility and anti-low temperature brittleness.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of high-tenacity gas shielded welding wire for welding low-temperature steel, described welding wire comprise that the mass percent (%) of following chemical composition and each chemical composition is: C:0.04~0.10, Si:0.20~0.60, Mn:1.20~1.60; Ni:1.5~2.0, Mo:0.10~0.30, Ti:0.02~0.10; Zr:0.02~0.08, S :≤0.010, P :≤0.010; O :≤0.0025, N :≤0.0070, surplus is Fe and unavoidable impurities.
Above-mentioned high-tenacity gas shielded welding wire for welding low-temperature steel, the mass percent of its chemical composition (%) is: C:0.052, Si:0.45, Mn:1.53; Ni:1.56, Mo:0.18, Ti:0.047; Zr:0.032, S:0.003, P:0.008; O:0.0018, N:0.0048, surplus is Fe and unavoidable impurities.
Above-mentioned high-tenacity gas shielded welding wire for welding low-temperature steel, the mass percent of its chemical composition (%) is: C:0.070, Si:0.46, Mn:1.48; Ni:1.79, Mo:0.24, Ti:0.056; Zr:0.042, S:0.004, P:0.007; O:0.0021, N:0.0053, surplus is Fe and unavoidable impurities.
Above-mentioned high-tenacity gas shielded welding wire for welding low-temperature steel, C mass percent (%) content is 0.04~0.10 in the welding wire, mass percent (%) scope of adding Ni and Mo element is Ni1.5~2.0; The Ti of trace, mass percent (%) scope Ti:0.02~0.10 of Zr element are added, Zr:0.02~0.08 in Mo:0.10~0.30; And each mass percent (%) S≤0.010; P≤0.010, O≤0.0025, N≤0.0070.
A kind of method for using of above-mentioned welding wire, adopting volume ratio during this welding wire welding is 80%Ar+20%CO 2Mixed gas protected.
Reduce the content of impurity elements such as C content and strict control S, P, O, N in the welding wire of the present invention, help reducing the ductile-brittle transition temperature of weld metal, improve the low-temperature flexibility of weld seam;
Add an amount of Mn, Si element, good deoxidation can be arranged, favourable to improving toughness, the effect that while Mn takes off S in addition;
Add the Ni element, solid solution can significantly improve the low-temperature flexibility of weld seam in ferrite; Add a spot of Mo and can improve the temper brittleness of weld metal;
Add further refinement seam organization of micro-Ti, Zr element, improve the low-temperature flexibility of weld metal.
TiO and ZrO that Ti, Zr and O form have promoted the formation of weld seam acicular ferrite structure, and Zr also can generate zirconium nitride with N chemical combination simultaneously, reduces the nomadic nitrogen in the weld seam, improves the toughness of weld seam.
Welding wire of the present invention compared with prior art has following characteristics:
1. welding wire of the present invention is low owing to C content, and has added an amount of Mn, Ni element, has reduced the ductile-brittle transition temperature of weld seam.
2. welding wire of the present invention forms oxide forming core particle through adding Ti, the Zr element of trace with O, impels the formation of weld seam acicular ferrite, has further improved the toughness of weld metal.
3. welding wire of the present invention is controlled impurity elements such as S, P, O, N owing to strict, and has good cracking resistance and low-temperature flexibility
4. welding wire of the present invention adopts 80%Ar+20%CO 2Mixed gas protected, can be welded on the low-temperature steel that environment is on active service more than-60 ℃.
The specific embodiment
Below in conjunction with test data and embodiment the present invention is described further.
The chemical composition scope of welding wire and the used mass percent of following examples according to the present invention; Adopt many stoves of vacuum induction furnace smelting welding wire steel; Through forge, rolling, hot candied, copper facing and twine operation such as axle; Be processed into the finished product welding wire of diameter 1.2mm, the chemical composition of each stove welding wire is as shown in table 1.
Each stove welding wire all adopts volume 80%Ar+20%CO 2Argon-rich gas shielded, same parts to be carried out same people weld equally, the identical time used identical device under the same conditions it to be carried out the same mechanical performance test after welding was accomplished, and the mechanical performance of gained deposited metal is as shown in table 2.
The chemical composition of welding wire in table 1 embodiment and each example
(mass percent %, surplus is Fe and unavoidable impurities in the listed chemical analysis)
The mechanical performance of each embodiment welding wire deposited metal of table 2
Figure BSA00000243855000042
This shows, S, P content height among the present invention, and C content has been controlled in strictness; Add Ti, the Zr element of an amount of Ni element and trace, and S≤0.010, P≤0.010; O≤0.0025, N≤0.0070 can be satisfied the low-temperature flexibility requirement of weld metal under-60 ℃ of environment fully.
At 80%Ar+20%CO 2The argon-rich gas shielded welding can be found out by table 2, adopts the welding wire of this chemical composition, and good mechanical property guarantees that metal welding seam has excellent low-temperature flexibility.

Claims (4)

1. a high-tenacity gas shielded welding wire for welding low-temperature steel is characterized in that, described welding wire comprises that the mass percent (%) of following chemical composition and each chemical composition is: C:0.04~0.10, Si:0.20~0.60; Mn:1.20~1.60, Ni:1.5~2.0, Mo:0.10~0.30, Ti:0.02~0.10; Zr:0.02~0.08, S :≤0.010, P :≤0.010; O :≤0.0025, N :≤0.0070, surplus is Fe and unavoidable impurities.
2. high-tenacity gas shielded welding wire for welding low-temperature steel according to claim 1 is characterized in that, the mass percent of its chemical composition (%) is: C:0.052, Si:0.45; Mn:1.53, Ni:1.56, Mo:0.18, Ti:0.047; Zr:0.032, S:0.003, P:0.008; O:0.0018, N:0.0048, surplus is Fe and unavoidable impurities.
3. high-tenacity gas shielded welding wire for welding low-temperature steel according to claim 1 is characterized in that, the mass percent of its chemical composition (%) is: C:0.070, Si:0.46; Mn:1.48, Ni:1.79, Mo:0.24, Ti:0.056; Zr:0.042, S:0.004, P:0.007; O:0.0021, N:0.0053, surplus is Fe and unavoidable impurities.
4. the method for using of any said welding wire of claim 1 to 3 is characterized in that, adopting volume ratio during this welding wire welding is 80%Ar+20%CO 2Mixed gas protected.
CN2010102628341A 2010-08-23 2010-08-23 High-tenacity gas shielded welding wire for welding low-temperature steel and using method thereof Active CN101913035B (en)

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CN102049597B (en) * 2011-01-07 2012-07-25 南京钢铁股份有限公司 Argon-enriched mixed gas protection welding method for high-strength abrasion-resistant steel
JP5792050B2 (en) * 2011-01-31 2015-10-07 株式会社神戸製鋼所 Submerged arc welding method for low temperature steel
CN103111772A (en) * 2013-02-25 2013-05-22 江苏省沙钢钢铁研究院有限公司 Weather-resistance steel gas-protection welding wire with excellent toughness under low temperature
CN103464930B (en) * 2013-09-18 2016-05-18 海宁瑞奥金属科技有限公司 Welding wire and solder flux and the application thereof for submerged arc welding of a kind of 9Ni low-temperature steel
CN111571061A (en) * 2020-05-26 2020-08-25 哈尔滨焊接研究院有限公司 Gas shielded welding wire

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CN1118295A (en) * 1995-07-21 1996-03-13 冶金工业部钢铁研究总院 Gas shielded welding wire
CN1343544A (en) * 2000-09-20 2002-04-10 中国科学院金属研究所 High-strength high-toughness weld wire for hidden arc welding of pressure container
CN1533315A (en) * 2002-01-31 2004-09-29 ������������ʽ���� Steel wire for carbon dioxide shielded arc welding and welding process asing the same

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GC0000233A (en) * 2000-08-07 2006-03-29 Exxonmobil Upstream Res Co Weld metals with superior low temperature toughness for joining high strength, low alloy steels
JP4811166B2 (en) * 2006-07-24 2011-11-09 Jfeスチール株式会社 Manufacturing method of super high strength welded steel pipe exceeding tensile strength 800MPa

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CN1118295A (en) * 1995-07-21 1996-03-13 冶金工业部钢铁研究总院 Gas shielded welding wire
CN1343544A (en) * 2000-09-20 2002-04-10 中国科学院金属研究所 High-strength high-toughness weld wire for hidden arc welding of pressure container
CN1533315A (en) * 2002-01-31 2004-09-29 ������������ʽ���� Steel wire for carbon dioxide shielded arc welding and welding process asing the same

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