CN102218621A - Gas shielded welding wire used for X100 pipeline steel - Google Patents
Gas shielded welding wire used for X100 pipeline steel Download PDFInfo
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- CN102218621A CN102218621A CN2011101399551A CN201110139955A CN102218621A CN 102218621 A CN102218621 A CN 102218621A CN 2011101399551 A CN2011101399551 A CN 2011101399551A CN 201110139955 A CN201110139955 A CN 201110139955A CN 102218621 A CN102218621 A CN 102218621A
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Abstract
The invention discloses a gas shielded welding wire used for X100 pipeline steel, and the gas shielded welding wire comprises the following components in percentage by weight: 0.06-0.12% of C, 1.60-2.20% of Mn, 0.25-0.60% of Si, more than 0 and less than or equal to 0.015% of P, more than 0 and less than or equal to 0.010% of S, 0.45-0.65% of Mo, 0.10-0.35% of Cu, 0.20-0.45% of Cr, 1.80-2.60% of Ni and the balance of Fe and inevitable impurities. The gas shielded welding wire is prepared according to the common welding wire production technology. In the gas shielded welding wire, the comprehensive action and welding line ingredients of each element are similar to the ingredients, ratio and comprehensive performance of an X100 pipeline steel system; a welding line has excellent mechanical and physical properties, better corrosion resistance, lower hardness and the like; the tensile strength Rm of the deposited metal of the welding wire is more than or equal to 800MPa, and impact power Akv at minus 10 DEG C is more than or equal to 100J; and the gas shielded welding wire has the characteristics of good welding technology performance, stable welding line strength, stable impact toughness and the like, thus, the gas shielded welding wire is especially suitable for gas shielding welding of X100 pipeline steel plates.
Description
Technical field
The invention belongs to the Metal Material Welding solid core welding wire, particularly a kind of X100 pipe line steel shield-arc welding solid core welding wire is specially adapted at 80%Ar+20%CO
2Argon-rich gas shielded down, X100 grade hydraulic oil, letter shoot line steel are carried out gas shielded arc welding.
Background technology
Natural gas is subject to people's attention just day by day as a kind of high Efficiency and Clean Energy Resources.Because gas field generally is positioned at the Desert Area away from the consumption market, be one of key issue of natural gas industry development how safely, economically with natural gas transport to the consumption market always.By technological innovation and to adopt more high pressure and more high-intensity pipeline be to reduce the long distance of natural gas to carry the valid approach of cost, also be the trend of natural gas long-distance transport pipes development.The raising of discharge pressure requires to adopt the more pipe line steel of high intensity levels.Nowadays, from the X52 in past, X60 and X65 pipe line steel develop into X70 and X80 high-strength line-pipe steel in worldwide Long-distance Transmission Pipeline construction, and the development of forward X90-X120 grade high-strength line-pipe steel.Domestic each big steel mills such as Baosteel, Anshan iron and steel plant, Nangang have developed X100 level pipe line steel, and following X100 level pipe line steel will become development trend, but corresponding shield-arc welding solid core welding wire still is in blank.
At application number is 200810052501, and denomination of invention is for disclosing a kind of gas protecting welding wire of the X80 of being exclusively used in pipe line steel in the patent documentation of " X80 grade of steel pipe line steel shield-arc welding solid core welding wire ".This welding wire is not owing to contain the Cr element, and the content of Ni, Mo element is not enough again, and contains the Ti element, the difference of other component content in addition, thereby poor with the matching of X100 pipe line steel alloy system, and its deposited metal performance can not meet the demands; And the applicant is CN101362263A at publication number; name is called " X80 grade steel oil; the letter shoot welding wire for gas shielded welding " patent documentation in a kind of gas protecting welding wire of the X80 of being exclusively used in pipe line steel is disclosed; though this welding wire contains the Cr element; but Ni; the content of Mo element is still not enough; particularly the content of Ni element far can not meet the demands; not only contain simultaneously the Ti element; also contain the B element; and the difference of ratio between other component content; thereby still existence is poor with the matching of X100 pipe line steel alloy system, and its deposited metal performance can not satisfy the X100 pipe line steel to defectives such as requirement of welding.
Summary of the invention
The objective of the invention is a kind of X100 pipe line steel of research and design welding wire for gas shielded welding, more desirably mate to reach the performance that is welded into weld seam behind the pipeline and composition, the performance of X80 tubing, make weld seam have the high strength close with pipeline body, high tenacity, corrosion resistance and reach lower premium properties such as hardness well, welding procedure is good; With the conveying capacity that improves oil, letter shoot road, the security of transportation, the life-span that the prolongation pipeline is carried, the purposes such as workload that reduce the maintaining of pipeline transportation line.
Solution of the present invention is the defective that exists at background technology, the content of Ni element in the welding wire that has been multiplied on basis of background technology, and suitably improves the content of Mo element; Though because Ti, B element can promote the formation of acicular ferrite, it is poor to cause welding arc to blow the technology of power deliquescing, welding; Therefore the present invention at the content of the Ni element that is multiplied and improve on the basis of content of Mo element, according to the alloying component of X100 pipe line steel, the content of adjustment member composition and ratio each other pointedly, from component of weld wire, cancel two kinds of elements of Ti, B simultaneously; Promptly at:
Carbon is the element that enlarges the γ phase region, but its solubility is limited, if there is a large amount of C in the weld seam, because of its hardenability significantly strengthens, the cold crack tendency becomes big; Simultaneously, the C element is a gap solution strengthening element, owing to cause the remarkable distortion of matrix dot matrix, causes the matrix micro-crack to be easy to produce and expansion, will the ballistic work of weld metal be descended greatly; And the too high increase that will cause spatter and weld fumes of carbon content, unfavorable to welding technological properties; The present invention by adding microalloy elements such as Mo, Ni, Cr, is complementary to guarantee weld metal intensity and mother metal under the suitable prerequisite of the C content that guarantees weld metal and mother metal, by suitably improving Mn content simultaneously;
Mn also is one of main alloy element of proof strength, its reinforcement ability is only second to the C element, an important function of adding the Mn element is the transition temperature that this element can effectively reduce γ → α, suppresses the formation of crystal boundary pro-eutectoid ferrite, impels and forms acicular ferrite structure in the weld seam.Simultaneously, consideration Mn/C compares the relation with deposited metal, and along with the increase of Mn/C ratio, toughness decreases.So in this alloy system, can not emphasize to reduce C content simply, the essential rational proportion of considering Mn/C; Therefore, the present invention is controlled at 1.6-2.2wt% with the Mn content in the welding wire;
Cr is a kind of metallic element with passivation tendency, the mode that improves chemical stability by the electrode potential of raising steel in dielectric improves decay resistance, but add the Cr element separately and can not improve anti-corrosion capability rapidly, have only and unite interpolation with other corrosion resistant alloys and just can significantly improve corrosion resistance; And Cr can improve weld metal intensity, Ni improves the steel corrosion resistance by the passivation mode, also can improve steel corrosion fatigue resistant ability, can prevent the oxidation of weld seam, improve the drag and minimizing steel sensitiveness to breach of steel to fatigue, reduce ductile-brittle transition temperature, atmosphere and salt are all had resistance to corrosion; Mo can reduce phase transition temperature, suppresses the formation of granular ferrite, promotes the transformation of acicular ferrite, and can improve Nb (C, precipitation strength effect N), thereby Mo can reduce ductile-brittle transition temperature in the intensity that improves steel; In order to reach the coupling of rational obdurability, Cr, Ni, Mo content are controlled at 0.20-0.45wt%, 1.80-2.60wt% and 0.50-0.65wt% respectively in the welding wire.
Cu has the effect of activated cathode, can promote steel to produce anodic passivity under certain condition, thereby reduces the corrosion rate of steel; Cu has obvious effects to the illeffects of offsetting S in the steel, but after Cu content is greater than 0.25wt%, and the improvement of steel corrosion resistance is become slow; Cu can be partially soluble in ferrite simultaneously, solubility is 0.35% under the room temperature, surpass solubility limit, superfluous copper just with disperse shape distribution of particles in steel, play strong induration, the increase of Cu content also will cause the raising (being easy to produce be full of cracks) of hot-working sensitiveness, be unfavorable for the raising of low-temperature flexibility, thereby the present invention control 0.10-0.35wt% with the content of Cu.
Thereby X100 pipe line steel of the present invention with the composition of welding wire for gas shielded welding and the percentage by weight of each composition is: C0.06-0.12%, Mn 1.60-2.20%, Si 0.25-0.60%, 0＜P≤0.015%, 0＜S≤0.010%, Mo0.50-0.65%, Cu 0.10-0.35%, Cr 0.20-0.45%, Ni 1.80-2.60%, surplus are Fe and unavoidable impurities; Protect the welding wire smelting process, drop in vaccum sensitive stove or the steel ladle in proportion according to conventional gas producing the required raw material of above-mentioned composition welding wire; through smelt, make wire rod, be drawn to require diameter after, again through heat treatment, cleaning, copper facing, bundling.
The present invention is owing to composition, proportioning and the combination property in the alloy system of the comprehensive function, composition of weld line and the X100 pipeline steel plate that pass through each element is very close, weld seam has good machinery, physics and mechanical property, its intensity height, toughness height, and have corrosion resistance and lower premium properties such as hardness preferably; Welding wire of the present invention adopts 80%Ar+20%CO
2Argon-rich gas shielded welding, the tensile strength Rm of gained deposited metal 〉=800MPa, deposited metal-10 ℃ ballistic work Akv 〉=100J; And welding wire of the present invention also has good welding technological properties, characteristics such as weld strength and impact flexibility value stabilization; Thereby the gas shield that is particularly suitable for X100 pipeline steel plate is welded.
The specific embodiment
Below each embodiment make wire rod after all smelting according to conventional gas protection welding wire smelting process, after being drawn to diameter of phi 1.2mm, get the finished product welding wire through heat treatment, cleaning, copper facing, bundling again.
Embodiment 1:
The chemical composition of welding wire and weight percent content are that C 0.088%, Mn 1.75%, Si 0.514%, P 0.010%, S 0.005%, Mo 0.561%, Cu 0.25%, Cr 0.27%, Ni 2.293%, surplus are Fe and unavoidable impurities.
The present embodiment welding wire adopts 80%Ar+20%CO2 gas shield welding, and welding parameter is: welding current is 240A, and arc voltage is 26V, does not carry out preheating and after-baking.The mechanical property of weld metal is: Rm=845MPa ,-10 ℃ of ballistic work Akv=115J.
Embodiment 2:
Component of weld wire and weight percent content are that C 0.073%, Mn 1.64%, Si 0.484%, P 0.007%, S 0.003%, Mo 0.518%, Cu 0.33%, Cr 0.259%, Ni 2.119%, surplus are Fe and unavoidable impurities.
The present embodiment welding wire adopts 80%Ar+20%CO2 gas shield welding, and welding parameter is: welding current is 240A, and arc voltage is 26V, does not carry out preheating and after-baking.The mechanical property of weld metal is: Rm=825MPa ,-10 ℃ of ballistic work Akv=102J.
Embodiment 3:
Component of weld wire and weight percent content are that C 0.096%, Mn 1.68%, Si 0.472%, P 0.009%, S 0.004%, Mo 0.510%, Cu 0.257%, Cr 0.329%, Ni 2.019%, surplus are Fe and unavoidable impurities.
The present embodiment welding wire adopts 80%Ar+20%CO2 gas shield welding, and welding parameter is: welding current is 240A, and arc voltage is 26V, does not carry out preheating and after-baking.The mechanical property of weld metal is: Rm=830MPa ,-10 ℃ of ballistic work Akv=104J.
Claims (4)
1. X100 pipe line steel shield-arc welding solid core welding wire, it is characterized in that the composition of welding wire is by weight percentage: C 0.06-0.12%, Mn 1.60-2.20%, Si 0.25-0.60%, 0＜P≤0.015%, 0＜S≤0.010%, Mo0.50-0.65%, Cu 0.10-0.35%, Cr 0.20-0.45%, Ni 1.80-2.60%, surplus are Fe and unavoidable impurities; Protect the welding wire smelting process, drop in vaccum sensitive stove or the steel ladle in proportion according to conventional gas producing the required raw material of above-mentioned composition welding wire; through smelt, make wire rod, be drawn to require diameter after, again through heat treatment, cleaning, copper facing, bundling.
2. X100 pipe line steel shield-arc welding solid core welding wire according to claim 1; it is characterized in that; described component of weld wire and weight percent content are that C 0.088%, Mn 1.75%, Si 0.514%, P 0.010%, S 0.005%, Mo0.561%, Cu 0.25%, Cr 0.27%, Ni 2.293%, surplus are Fe and unavoidable impurities.
3. X100 pipe line steel shield-arc welding solid core welding wire according to claim 1; it is characterized in that; described component of weld wire and weight percent content are that C 0.073%, Mn 1.64%, Si 0.484%, P 0.007%, S 0.003%, Mo 0.518%, Cu 0.33%, Cr 0.259%, Ni 2.119%, surplus are Fe and unavoidable impurities.
4. X100 pipe line steel shield-arc welding solid core welding wire according to claim 1; it is characterized in that; described component of weld wire and weight percent content are that C 0.096%, Mn 1.68%, Si 0.472%, P 0.009%, S 0.004%, Mo0.510%, Cu 0.257%, Cr 0.329%, Ni 2.019%, surplus are Fe and unavoidable impurities.
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Cited By (7)
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| CN103121148A (en) * | 2012-10-23 | 2013-05-29 | 中国石油天然气集团公司 | Welding material and welding process for welding X100 pipeline steel |
| CN104475935A (en) * | 2014-11-24 | 2015-04-01 | 南京钢铁股份有限公司 | Field welding method for CO2-corrosion-resistant pipeline steel |
| CN105234587A (en) * | 2015-11-20 | 2016-01-13 | 山东钢铁股份有限公司 | Gas shielded welding no-plated-copper solid welding wire for 1500 MPa-grade ultrahigh-strength steel |
| CN105772984A (en) * | 2016-03-23 | 2016-07-20 | 中国电建集团上海能源装备有限公司 | Cr-controlled low-alloy steel argon tungsten arc welding wire with excellent low-temperature toughness |
| CN111571062A (en) * | 2020-05-26 | 2020-08-25 | 哈尔滨焊接研究院有限公司 | Low alloy steel gas shielded welding wire for 800 MPa-level welding |
| CN112917041A (en) * | 2021-01-26 | 2021-06-08 | 西安理工大学 | Gas-shielded metal type flux-cored wire for X100 pipeline steel and preparation method thereof |
| CN112917043A (en) * | 2021-01-26 | 2021-06-08 | 西安理工大学 | Gas shielded welding wire for X100 pipeline steel welding and preparation method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104475935A (en) * | 2014-11-24 | 2015-04-01 | 南京钢铁股份有限公司 | Field welding method for CO2-corrosion-resistant pipeline steel |
| CN105234587A (en) * | 2015-11-20 | 2016-01-13 | 山东钢铁股份有限公司 | Gas shielded welding no-plated-copper solid welding wire for 1500 MPa-grade ultrahigh-strength steel |
| CN105234587B (en) * | 2015-11-20 | 2017-06-20 | 山东钢铁股份有限公司 | A kind of 1500MPa grades of super-high strength steel gas shielded arc welding coppering-free solid solder wire |
| CN105772984A (en) * | 2016-03-23 | 2016-07-20 | 中国电建集团上海能源装备有限公司 | Cr-controlled low-alloy steel argon tungsten arc welding wire with excellent low-temperature toughness |
| CN111571062A (en) * | 2020-05-26 | 2020-08-25 | 哈尔滨焊接研究院有限公司 | Low alloy steel gas shielded welding wire for 800 MPa-level welding |
| CN112917041A (en) * | 2021-01-26 | 2021-06-08 | 西安理工大学 | Gas-shielded metal type flux-cored wire for X100 pipeline steel and preparation method thereof |
| CN112917043A (en) * | 2021-01-26 | 2021-06-08 | 西安理工大学 | Gas shielded welding wire for X100 pipeline steel welding and preparation method |
| CN112917041B (en) * | 2021-01-26 | 2022-07-01 | 西安理工大学 | Gas-shielded metal type flux-cored wire for X100 pipeline steel and preparation method thereof |
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