CN101905390B - Gas-protection welding wire with low alloy and high strength - Google Patents
Gas-protection welding wire with low alloy and high strength Download PDFInfo
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- CN101905390B CN101905390B CN2010102623278A CN201010262327A CN101905390B CN 101905390 B CN101905390 B CN 101905390B CN 2010102623278 A CN2010102623278 A CN 2010102623278A CN 201010262327 A CN201010262327 A CN 201010262327A CN 101905390 B CN101905390 B CN 101905390B
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Abstract
The invention provides a gas-protection welding wire with low alloy and high strength, comprising the following chemical components in percentage by weight: 0.06%-0.12% of C, 0.30%-0.60% of Si, 1.40%-2.00% of Mn, not more than 0.025% of P, not more than 0.015% of S, 0.30%-0.70% of Cr, 1.0%-1.6% of Ni, 0.28%-0.5% of W, 0.25%-0.50% of Cu, 0.05%-0.15% of Re and the balance of Fe and inevitable impurities. The welding wire has the advantages of favorable welding state of the obtained welding line and thermal-treated toughness, lower cost than that of the traditional welding wire in the same strength level, higher cost performance and strong practicality.
Description
Technical field
The present invention relates to a kind of gas protecting welding wire, be meant a kind of gas-protection welding wire with low alloy and high strength especially.
Background technology
High with the welding wire welding quality of gas shield, easily be automated, therefore and suitable welded high-strength-and-toughness steel grade is used widely at steel industry.For the low-alloy high-strength steel weld seam; In order to guarantee the intensity of weld seam; The alloying element that need in welding wire, add q.s comes strengthen welds, and existing low-alloy high-strength welding wire generally adopts more valuable alloying elements such as Mo to come strengthen welds, the employing Cr element that also has.
Along with weld strength improves, the toughness of weld seam is downward trend.Weld seam is prone to produce hardened structure, and crack resistance reduces.Under the situation that the high strength welding seam toughness is difficult to improve, the destruction of trace harmful elements and hydrogen is vital to improving safety of welding seam property in purification seam organization, the anti-temper brittleness of raising weld seam, the reduction weld seam.
Because therefore the Mo metallic element has anti-temper brittleness in weld seam effect often contains certain Mo metallic element in the high-strength welding wire of existing low-alloy, cost is higher.
Summary of the invention
The objective of the invention is the above-mentioned deficiency to prior art, provide a kind of and can purify seam organization, improve the anti-temper brittleness of weld seam, reduce the low-alloy high-strength gas protecting welding wire of the destruction of trace harmful elements and hydrogen in the weld seam.
For realizing above-mentioned purpose; The present invention adopts technique scheme: a kind of gas-protection welding wire with low alloy and high strength; The percetage by weight of its chemical composition is: C:0.06-0.12%, S i:0.30-0.60%, Mn:1.40-2.00%, P≤0.025%, S≤0.015%, Cr:0.30-0.70%, Ni:1.0-1.6%, W:0.28-0.5%, Cu:0.25-0.50%, Re:0.05-0.15%, all the other are Fe and unavoidable impurities.
Comprise in the said welding wire chemical composition that weight fraction is the W of 0.28-0.45% and the Re of 0.08-0.13%.
The percetage by weight of said welding wire chemical composition is: C:0.11%, Si:0.55%, Mn:1.85%, P:0.015%, S:0.015%, Cr:0.60%, Ni:1.3%, W:0.30%, Cu:0.35%, Re:0.08%, all the other are Fe and unavoidable impurities.
Below be the effect and the qualification thereof of essential element of the present invention, the conclusion that in experimentation and application, obtains:
C：0.06-0.12％，
C is the intensified element in the welding wire, and the obdurability of content butt welded seam and tissue thereof are formed has bigger influence.When C content was low, weld strength was lower.When the C too high levels, welding seam toughness descends.For reaching the good obdurability coupling of weld seam, the C content in the welding wire of the present invention is 0.06-0.12%.
Si：0.30-0.60％，
When the Si element is protected the weldering welding at gas, have deoxidation on the one hand, also butt welding is sewed with invigoration effect on the other hand.But the Si content in the weld seam should not be too high, otherwise can influence the toughness of weld seam, reduces the cracking resistance of weld seam.The weight percent content of S i is controlled in the 0.30-0.60% scope in the welding wire of the present invention.
Mn：1.40-2.00％，
Mn is the effective element of weld seam Strengthening and Toughening, when gas is protected weldering, also helping deoxidation, prevents to cause the formation of the iron sulfide of fire check.When containing higher Mn in the weld seam, the transformation initial temperature of weld seam acicular ferrite is low, and transformetion range is big, finally can improve acicular ferrite volume ratio in the weld seam.The percentage by weight of Mn is controlled at 1.40-2.00% in the welding wire of the present invention.
P≤0.025％、S≤0.015％，
P, S are harmful elements, and content is low more good more, and along with control P, S constituent content reduce, cost can rise, and the present invention only need control P, S gets final product in the scope of P≤0.025%, S≤0.015%.
Cr：0.30-0.70％，
The Cr element is a kind of effective intensified element, helps improving acicular ferrite content in the weld seam, reduces pro-eutectoid ferrite, and the effect of refinement ferrite crystal grain is arranged, and improve the toughness of weld seam, but too high Cr can reduce the toughness of weld seam.The weight percent content of Cr is 0.30-0.70% in the welding wire of the present invention.
Ni：1.0-1.6％，
The toughness that Ni helps improving weld metal is low-temperature impact toughness especially, reduces brittle transition temperature.Ni can reduce the proeutectoid ferrite body burden and improve welding seam toughness.But during the Ni too high levels, low-temperature impact toughness significantly descends.The Ni too high levels also causes weld seam and mother metal composition difference big, and the welding wire cost increases simultaneously.The weight percent content of Ni is 1.0-1.6% in the welding wire of the present invention.
W：0.28-0.5％，
The W element can improve the quenching degree of weld seam, suppresses grain growth effectively, and the grain growth of the heat affected area in weld seam is also not obvious, so the butt welded seam anti-tempered performance is favourable.The weight percent content of W is 0.28-0.5% in the welding wire of the present invention.
Cu：0.25-0.50％，
Cu content is within the specific limits the time, can solid solution in weld seam, improve weld strength and toughness.It is better when Cu content is 0.25-0.50% in the welding wire of the present invention.
Re：0.05-0.15％，
Re is a rare earth element, has desulfurization, improves the form of sulfide and the effect of distribution, can improve welding seam toughness; Can also reduce the diffusible hydrogen content in the weld seam; Reduce cold crack sensitiveness, purify weld seam, reduce the illeffects of impurity elements such as H, S in the weld seam.The weight percent content of Re is 0.05-0.15% in the welding wire of the present invention.
Welding wire of the present invention adopts C, Cr, Mn, Ni and elements such as w to realize the reinforcement of weld seam, the control content of elements, and thinner crystal grain has also improved the distribution of harmful element, further improves the toughness of weld seam; Adopt Si, Mn deoxidation, smelting process is realized easily, the wire rod rolling mill practice is stable; Utilize rare earth element Re to purify weld seam, reduce trace harmful elements in the weld seam, improve the toughness and the tempering property of weld seam.Toughness is good after the as-welded and heat treatment of the weld seam that welding wire of the present invention obtains, and cost is lower than existingly with the intensity rank welding wire, and cost performance is higher, has good market prospects and economic benefit.
The specific embodiment
Followingly further specify the present invention according to specific embodiment:
Adopt the 50kg intermediate frequency furnace to smelt, select for use low S, P steel scrap (P≤0.025%, S≤0.015%) to carry out the smelting of welding wire steel according to conventional method.Treat that C content is lower than deoxidation in 0.05% o'clock, Ni, Cu and W allocate at when filling with substance, and Cr added in refining period, and Re adopts suspension method adding in the ingot mould.Smelt and adopt Si iron and the deoxidation of Mn iron, and strict control trace element and gas content, tapping temperature 1630-1640 ℃, best casting ingot-forming.The content of above-mentioned element is as shown in table 1.Above-mentioned steel ingot is packed into stove or hot stove (furnace temperature＜1000 ℃) is packed into, be incubated half an hour after being warming up to 1180 ℃.Start rolling temperature >=1100 ℃, 900 ℃ of finishing temperatures are rolled into square billet, roll the back air cooling.Square billet is rolling in small-sized wire rolling plants.Square billet is gone into and is incubated half an hour after stove is warming up to about 1200 ℃, is rolled into Φ 5.5mm wire rod.Wire rod through peel off, pickling, heat treatment once is drawn into the welding wire that specification is Φ 1.2mm at last when being drawn to Φ 3.2mm, Electroless copper is after pressing mold can obtain gas-protection welding wire with low alloy and high strength 1-5 of the present invention.
Table 1 gas-protection welding wire with low alloy and high strength chemical composition (wt%)
| The welding wire numbering | C | Si | Mn | Cu | Cr | W | Ni | Re |
| 1 | 0.11 | 0.55 | 1.85 | 0.35 | 0.60 | 0.30 | 1.30 | 0.08 |
| 2 | 0.08 | 0.45 | 1.70 | 0.27 | 0.40 | 0.28 | 0.90 | 0.13 |
| 3 | 0.075 | 0.50 | 1.50 | 0.34 | 0.42 | 0.45 | 0.95 | 0.10 |
| 4 | 0.06 | 0.60 | 2.00 | 0.25 | 0.70 | 0.50 | 1.00 | 0.15 |
| 5 | 0.12 | 0.30 | 1.40 | 0.50 | 0.30 | 0.40 | 1.60 | 0.05 |
Adopt the ordinary hot roll process that Rolling from Ingot is processed the 6mm plate as mother metal, use 80%Ar+20%CO
2Mist adopts gas-protection welding wire with low alloy and high strength 1-3 of the present invention for protection gas, in each welding of mother metal positive and negative together, guarantees to form the weld seam of whole penetrations, and the chemical composition of said weld seam is as shown in table 2.
The chemical composition of table 2 weld seam (wt%)
| The welding wire numbering | Welding seam No | C | Si | Mn | Cu | Cr | W | Ni | Re |
| 1 | 10 | 0.095 | 0.47 | 1.58 | 0.40 | 0.54 | 0.28 | 1.25 | 0.04 |
| 2 | 20 | 0.075 | 0.42 | 1.47 | 0.29 | 0.37 | 0.26 | 0.88 | 0.07 |
| 3 | 30 | 0.070 | 0.45 | 1.30 | 0.30 | 0.40 | 0.40 | 0.90 | 0.05 |
Weld metal in the his-and-hers watches 2 carries out mechanical property test, tensile sample diameter 6mm, impact specimen size 5 * 10 * 55 (mm).Expression mean value in the mechanical property such as the table 3 of pilot seam, the bracket in the table.
The mechanical property of table 3 weld seam
Can find out weld the performance that the Weld Performance that obtains can reach existing welding wire with welding wire of the present invention, but cost to have good market prospects far below existing welding wire through table 3.
Claims (1)
1. gas-protection welding wire with low alloy and high strength; The percetage by weight of its chemical composition is: C:0.11%, Si:0.55%, Mn:1.85%, P:0.015%, S:0.015%, Cr:0.60%, Ni:1.3%, W:0.30%, Cu:0.35%, Re:0.08%, all the other are Fe and unavoidable impurities.
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| Application Number | Priority Date | Filing Date | Title |
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| CN101905390A CN101905390A (en) | 2010-12-08 |
| CN101905390B true CN101905390B (en) | 2012-05-23 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101992365B (en) * | 2010-12-20 | 2013-07-24 | 成都新大洋焊接材料有限责任公司 | High-strength and high-tenacity gas shielded welding wire |
| CN102728954A (en) * | 2012-07-12 | 2012-10-17 | 武汉钢铁(集团)公司 | Method for reducing strip breakage rate of laser weld of acid rolling machine set |
| CN103056548B (en) * | 2012-12-20 | 2014-10-15 | 成都新大洋焊接材料有限责任公司 | High-strength heat-resistant steel gas-shielded solid wire |
| CN103331530B (en) * | 2013-06-14 | 2016-05-18 | 武汉钢铁(集团)公司 | A kind of RmHigh-ductility pure argon shield welding wire and the using method thereof of >=1100MPa |
| CN105479035A (en) * | 2015-12-25 | 2016-04-13 | 江苏烁石焊接科技有限公司 | High-nitrogen steel welding wire and manufacturing process thereof |
| CN105772986A (en) * | 2016-04-30 | 2016-07-20 | 翁庚群 | Solid cored welding wire for cast iron weld repair |
| CN112719692B (en) * | 2021-04-01 | 2021-07-09 | 四川西冶新材料股份有限公司 | 900 MPa-grade high-strength steel gas shielded solid welding wire and preparation method thereof |
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| JP3038846B2 (en) * | 1990-09-03 | 2000-05-08 | 大同特殊鋼株式会社 | Gas shielded arc welding solid wire |
| US6242113B1 (en) * | 1999-06-10 | 2001-06-05 | Inco Alloys International, Inc. | Welding alloy and articles for use in welding, weldments and methods for producing weldments |
| CN1127390C (en) * | 2001-11-08 | 2003-11-12 | 武汉钢铁(集团)公司 | High-toughness gas protective welding wire for low alloy high-strength steel |
| CN1301825C (en) * | 2003-10-27 | 2007-02-28 | 宝山钢铁股份有限公司 | Weather-resistant gas-shielded solder wire |
| 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 |
| AU2006347111B2 (en) * | 2006-08-09 | 2011-01-20 | Ing Shoji Co., Ltd. | Iron-based corrosion resistant wear resistant alloy and deposit welding material for obtaining the alloy |
| CN100441364C (en) * | 2006-09-13 | 2008-12-10 | 武汉钢铁(集团)公司 | High ductility buried arc welding wire for low-alloy super-strength steel |
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