CN102319967A - Gas-shielded welding solid welding wire for low-carbon high-strength structural steel - Google Patents
Gas-shielded welding solid welding wire for low-carbon high-strength structural steel Download PDFInfo
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- CN102319967A CN102319967A CN201110257938A CN201110257938A CN102319967A CN 102319967 A CN102319967 A CN 102319967A CN 201110257938 A CN201110257938 A CN 201110257938A CN 201110257938 A CN201110257938 A CN 201110257938A CN 102319967 A CN102319967 A CN 102319967A
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Abstract
The invention discloses a gas-shielded welding solid welding wire for low-carbon high-strength structural steel of strength grades equal to and higher than 60 kilograms. The welding wire comprises 0.05 to 0.10 percent by weight of C, 1.30 to 1.90 percent by weight of Mn, 0.50 to 1.00 percent by weight of Si, 0.30 to 0.60 percent by weight of Cr, 0.05 to 0.18 percent by weight of Ti, 0.002 to 0.010 percent by weight of B, 0.010 to 0.070 percent by weight of V, 0.10 to 0.40 percent by weight of Cu, less than or equal to 0.025 percent by weight of S, less than or equal to 0.025 percent by weight of P and the balance of Fe and inevitable impurities. The production cost of the welding wire is low, welding can be carried out under the protection of CO2 or the mixture of 80 percent of Ar and 20 percent of CO2, the toughness of weld metal is high, welding spatter is little, cracking tendency is reduced after welding, and the difficulty of construction is decreased.
Description
Technical field
The invention belongs to field of welding material, relate generally to a kind of low carbon high-strength degree structural steel and use the gas shielded arc welding solid welding wire.
Background technology
Hi-Stren steel is a kind of have excellent low-temperature impact toughness, high-intensity steel, and the security that can alleviate construction weight, improves structure reduces material consumption, is specially adapted to industries such as engineering machinery, coal mine machinery, bridge construction.But often occur the crackle tendency easily when the solid welding wire that on the low-alloy high-strength steel structure of 60 kilograms and above intensity rank, uses at present, actual welding, thereby influence welding quality; In order to reduce the crackle tendency, when welding operation, need however still can not avoid the generation of crackle tendency fully with welding again after the preheating of mother metal elder generation.In addition, contain more metallic nickel and metal molybdenum in this type welding wire, nickel and molybdenum belong to rare metals resources, have not only increased the manufacturing cost of welding wire but also wasted valuable resource.
Summary of the invention
The purpose of this invention is to provide a kind of low-alloy high-tensile structural steel that is used for 60 kilograms and above intensity rank and use the gas shielded arc welding solid welding wire.
Welding wire of the present invention is made up of the component of following mass fraction: C:0.05%～0.10%, Mn:1.30% ~ 1.90%, Si:0.50% ~ 1.00%; Cr:0.30% ~ 0.60%, Ti:0.05% ~ 0.18%, B:0.002% ~ 0.010%; V:0.010% ~ 0.070%, Cu:0.10% ~ 0.40%, S :≤0.025%; P :≤0.025%, surplus is Fe and unavoidable impurities; Wherein, unavoidable impurities content is smaller or equal to 0.01% of Fe content; Each constituent mass sum is 100%.
General conventional manufacturing process in the industry is adopted in welding wire preparation of the present invention, does not have specific (special) requirements.Get according to the above ratio after each component mixes,, forging, hot rolling, annealing, wire drawing, copper facing, twine operations such as axle, packing, promptly obtain welding wire through electric furnace smelting.
Welding wire of the present invention is through adopting CO
2Gas or 80%Ar+20%CO
2Two kinds of gas shield modes of mist are welded, and can reach different tensile strength ranks, satisfy the welding requirements of varying strength rank steel construction.Adopt CO
2During the gas shield welding, the mechanical property of gained deposited metal reaches the welding requirements of tensile strength 60 kg class steel construction; Adopt 80%Ar+20%CO
2When mixed gas arc welding connect, the mechanical property of gained deposited metal reached tensile strength 70 feather weight steel construction welding requirements.
Welding wire of the present invention is applicable to the welding of other high-strength steel structure of welding respective strengths level, can be widely used in industries such as engineering machinery, coal mine machinery, bridge construction.
The main effect of various elements in this welding wire:
C is the key factor of proof strength; Too high C causes crisp element; Can promote the formation of high carbon martensite along with the increase of C content; Have a strong impact on the cracking resistance and the impact flexibility of weld metal,, the C content in the welding wire is controlled between 0.05% ~ 0.10% so in welding wire, want the content of strict control carbon.
Si, Mn are as main deoxidant element, and an amount of Si, Mn can improve the toughness of deposited metal, and control Si content can also improve welding technological properties, and the Si content in the welding wire is controlled between 0.50% ~ 0.90%, and Mn content is controlled between 1.30% ~ 1.90%.
Add the Cr element; Improve the quenching degree of weld metal, suppress to roll over earlier the formation that ferritic formation promotes acicular ferrite altogether, their adding can reduce the transition temperature of acicular ferrite; Thereby make weld metal have advantages of higher tensile strength, also have good low-temperature impact toughness simultaneously.Cr content in the welding wire is controlled between 0.30% ~ 0.60%.
A spot of Cu not only can consolidate dark strengthen welds metal; And improved the decay resistance of weld metal; But the too high arc stability that can reduce welding of Cu constituent content, and in welding, be prone to produce heat cracking, therefore the Cu content in the welding wire is controlled between 0.10% ~ 0.40%.。
S, P can have a strong impact on the toughness of weld metal as impurity element when content is higher, should reduce as far as possible.
Advantage of the present invention and characteristics:
1. welding wire of the present invention is through adopting CO
2Gas or 80%Ar+20%CO
2Two kinds of gas shield modes of mist are welded, and can reach different tensile strength ranks, satisfy the welding requirements of varying strength rank steel construction.
2. welding wire of the present invention does not contain valuable metallic nickel and metal molybdenum element, has reduced production cost of products, has practiced thrift valuable scarce resource simultaneously.
3. welding wire of the present invention is through a small amount of interpolation Ti, V, B element and control its ratio, makes grain refinement, improves the toughness of weld metal, reduces spatter, has improved welding operation technology.
4. welding wire of the present invention has good performance, and the intensity and the toughness of weld metal are improved, and welding operation technology improves, and has reduced the crackle tendency after the welding, has reduced difficulty of construction.
5. low production cost.
The specific embodiment
In order to understand the present invention, further specify the present invention below in conjunction with embodiment, but do not limit the present invention.
Embodiment 1Prepare welding wire of the present invention
Get C:0.07% by weight, Mn:1.55%, Si:0.75%, Cr:0.350%; Ti:0.08%, B:0.004%, V:0.040%; Cu:0.15%, S:0.010%, P:0.015%; Surplus is Fe and unavoidable impurities, and wherein the content of unavoidable impurities is less than 0.01% of Fe weight, and each composition weight sum is 100%.After getting component mixed, adopt general manufacturing process in the industry, through electric furnace smelting, forging, hot rolling, annealing, wire drawing, copper facing, twine axle, be processed into the finished product welding wire of diameter 1.2mm, packing promptly gets.
Embodiment 2Prepare welding wire of the present invention
Get C:0.05% by weight, Mn:1.58%, Si:0.75%, Cr:0.400%; Ti:0.05%, B:0.004%, V:0.030%, Cu:0.15%; S:0.010%, P:0.015%, surplus is Fe and unavoidable impurities, wherein the content of unavoidable impurities is less than 0.01% of Fe weight; Each composition weight sum is 100%, according to embodiment 1 operation, gets diameter 1.2mm solid welding wire.
Embodiment 3Prepare welding wire of the present invention
Get C:0.05% by weight, Mn:1.65%, Si:0.80%, Cr:0.40%; Ti:0.08%, B:0.002%, V:0.030%, Cu:0.12%; S:0.010%, P:0.015%, surplus is Fe and unavoidable impurities, wherein the content of unavoidable impurities is less than 0.01% of Fe weight; Each composition weight sum is 100%, according to embodiment 1 operation, gets diameter 1.2mm solid welding wire.
Embodiment 4Prepare welding wire of the present invention
Get C:0.06% by weight, Mn:1.55%, Si:0.75%, Cr:0.500%; Ti:0.10%, B:0.003%, V:0.030%, Cu:0.12%; S:0.010%, P:0.015%, surplus is Fe and unavoidable impurities, wherein the content of unavoidable impurities is less than 0.01% of Fe weight; Each composition weight sum is 100%, according to embodiment 1 operation, gets diameter 1.2mm solid welding wire.
Test Example 1-4
Embodiment 1-4 is carried out soldering test, and the mechanical property of gained deposited metal is as shown in table 1.
Table 1
The welding rod that embodiment 1-4 makes can be used for industries such as engineering machinery, coal mine machinery, bridge construction.
Claims (1)
1. a low carbon high-strength degree structural steel is used the gas shielded arc welding solid welding wire, it is characterized in that welding wire is made up of the component of following mass fraction: C:0.05%～0.10%, Mn:1.30% ~ 1.90%; Si:0.50% ~ 1.00%, Cr:0.30% ~ 0.60%, Ti:0.05% ~ 0.18%; B:0.002% ~ 0.010%, V:0.010% ~ 0.070%, Cu:0.10% ~ 0.40%; S :≤0.025%, P :≤0.025%, surplus is Fe and unavoidable impurities; Wherein, unavoidable impurities content is smaller or equal to 0.01% of Fe content; Each constituent mass sum is 100%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110257938A CN102319967A (en) | 2011-09-02 | 2011-09-02 | Gas-shielded welding solid welding wire for low-carbon high-strength structural steel |
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| CN201110257938A CN102319967A (en) | 2011-09-02 | 2011-09-02 | Gas-shielded welding solid welding wire for low-carbon high-strength structural steel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104159700A (en) * | 2012-03-09 | 2014-11-19 | 株式会社神户制钢所 | Solid wire, and gas-shielded arc welding method using same |
| 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 |
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| CN1843683A (en) * | 2005-04-07 | 2006-10-11 | 株式会社神户制钢所 | Solid-core welding wire for gas shielded welding |
| CN101310908A (en) * | 2008-06-30 | 2008-11-26 | 武汉钢铁(集团)公司 | High intensity steel gas shielded welding technique method |
| JP2010158716A (en) * | 2009-01-09 | 2010-07-22 | Jfe Engineering Corp | Welding wire for high-tensile steel |
| JP2011005531A (en) * | 2009-06-26 | 2011-01-13 | Nippon Steel Corp | Flux-cored welding wire for high-tensile steel and method for manufacturing the same |
| CN101992365A (en) * | 2010-12-20 | 2011-03-30 | 成都新大洋焊接材料有限责任公司 | High-strength and high-tenacity gas shielded welding wire |
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2011
- 2011-09-02 CN CN201110257938A patent/CN102319967A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843683A (en) * | 2005-04-07 | 2006-10-11 | 株式会社神户制钢所 | Solid-core welding wire for gas shielded welding |
| CN101310908A (en) * | 2008-06-30 | 2008-11-26 | 武汉钢铁(集团)公司 | High intensity steel gas shielded welding technique method |
| JP2010158716A (en) * | 2009-01-09 | 2010-07-22 | Jfe Engineering Corp | Welding wire for high-tensile steel |
| JP2011005531A (en) * | 2009-06-26 | 2011-01-13 | Nippon Steel Corp | Flux-cored welding wire for high-tensile steel and method for manufacturing the same |
| CN101992365A (en) * | 2010-12-20 | 2011-03-30 | 成都新大洋焊接材料有限责任公司 | High-strength and high-tenacity gas shielded welding wire |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104159700A (en) * | 2012-03-09 | 2014-11-19 | 株式会社神户制钢所 | Solid wire, and gas-shielded arc welding method using same |
| CN104159700B (en) * | 2012-03-09 | 2016-08-24 | 株式会社神户制钢所 | Solid core welding wire and the gas-shielded arc welding method using it |
| 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 |
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Application publication date: 20120118 |