CN103317257B - High-strength high-tenacity submerged arc welding wires for bainite steel - Google Patents
High-strength high-tenacity submerged arc welding wires for bainite steel Download PDFInfo
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Abstract
The invention discloses high-strength high-tenacity submerged arc welding wires for bainite steel. The high-strength high-tenacity submerged arc welding wires for the bainite steel are formed by, based on the weight percent, 0.010 to 0.050 % of carbon, 1.800 to 2.100 % of manganese, 0.400 to 0.800 % of molybdenum, 0.150 to 0.450 % of tanium, 0.005 to 0.010 % of boron, 1.000 to 1.500 % of nickel, 0.200 to 0.300 % of copper, 0.010 to 0.020 % of silicon, 0.020 to 0.040 % of niobium, 0.100 to 0.400 % of chromium, 0.100 to 0.250 % of radium, 0.005 % of phosphorus, 0.003 % of sulphur and the abundant to be ferrum and the sum of the weight percent is 100 %. The high-strength high-tenacity submerged arc welding wires for the bainite steel have the advantages of solving the problems that a manufacturing cycle is long and the cost is high when measures such as the preheating and the postweld processing are used to weld the bainite steel in the prior art.
Description
Technical field
The invention belongs to field of welding material, be specifically related to a kind of bainitic steel high-strength and high ductility welding wire for submerged-arc welding.
Background technology
Along with the quick growth of economy, the demand of people to steel increases day by day.High-grade bainitic steel has good intensity, toughness and welding performance and becomes desirable Industrial Steels material, and meet sustainable development requirement and be subject to the strong interest of people, obtaining a wide range of applications in industries such as automobile, machine-building, electrical equipment and national defence.As everyone knows, the intensity of steel is higher, and its toughness deposit is lower.For this bainite steel product, the key technical problem that solve is exactly weld defect problem.Prior art head it off is modal is take the measure such as preheating and post weld heat treatment, but the cost of these measures extends the manufacturing cycle, adds manufacturing cost, and increases the labour intensity of workman.
High-strength and high ductility welding material, can reduce the generation probability of weld defect to a certain extent, can also reduce requirement and the production cost of process conditions, and can obtain the seam organization of function admirable and the high welding point of Strengthening and Toughening.Visible, develop a kind of high-performance solder wire material matched with mother metal, and ensure its application in the industrial production, seem very important.
Summary of the invention
The object of this invention is to provide a kind of bainitic steel high-strength and high ductility welding wire for submerged-arc welding, solving the existing welding wire problem that the manufacturing cycle is long when welding bainitic steel, cost is high.
The technical solution adopted in the present invention is: a kind of bainitic steel high-strength and high ductility welding wire for submerged-arc welding, composed of the following components by mass percentage: C0.010 ~ 0.050%, Mn1.800 ~ 2.100%, Mo0.400 ~ 0.800%, Ti0.150 ~ 0.450%, B0.005 ~ 0.010%, Ni1.000 ~ 1.500%, Cu0.200 ~ 0.300%, Si0.010 ~ 0.020%, Nb0.020 ~ 0.040%, Cr0.100 ~ 0.400%, Re0.100 ~ 0.250%, P<0.005%, S<0.003%, surplus is Fe, above-mentioned each constituent mass percentage sum is 100%.
The invention has the beneficial effects as follows: bainitic steel high-strength and high ductility welding wire for submerged-arc welding of the present invention, solve prior art and take the measure such as preheating and the after welding treatment problem that the weld defect manufacturing cycle is long to reduce, cost is high when welding bainitic steel; Welding wire and sintered flux SJ101 with the use of, ensure that stabilising arc is functional, molten bath good fluidity, splashing particle is tiny, and deslag after welding is easy, and slag covers evenly; Appearance of weld is careful attractive in appearance, and strength of joint is higher, toughness is good; Be applicable to Large Heat Input Welding, not preheating before weldering, postwelding does not process, and has both been applicable to individual layer multilayer, is also applicable to single or double welding; Development technology is simple, with low cost, is easy to suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the metallographic structure figure of the rear Weld pipe mill of welding wire welding that the embodiment of the present invention 1 is produced;
Fig. 2 is the metallographic structure figure of the rear Weld pipe mill of welding wire welding that the embodiment of the present invention 2 is produced;
Fig. 3 is the metallographic structure figure of the rear Weld pipe mill of welding wire welding that the embodiment of the present invention 3 is produced.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
A kind of bainitic steel high-strength and high ductility welding wire for submerged-arc welding of the present invention, composed of the following components by mass percentage: C0.010 ~ 0.050%, Mn1.800 ~ 2.100%, Mo0.400 ~ 0.800%, Ti0.150 ~ 0.450%, B0.005 ~ 0.010%, Ni1.000 ~ 1.500%, Cu0.200 ~ 0.300%, Si0.010 ~ 0.020%, Nb0.020 ~ 0.040%, Cr0.100 ~ 0.400%, Re0.100 ~ 0.250%, P<0.005%, S<0.003%, surplus is Fe, and above-mentioned each constituent mass percentage sum is 100%.
The design principle of chemical composition of the present invention is as follows:
(1) C:C content is close to zero, and the nose of bainite in the continuous cooling transformation (CCT) curve of steel will move to left, under the cooldown rate of wide range, form bainite structure.C content raises, and original austenite grain size increases, and column crystal width increases, and the ratio of acicular ferrite (AF) increases, and the quantity of pro-eutectoid ferrite reduces.In bainitic steel weld metal, C content limit general control is below 0.12%, and carbon content increases, and toughness improves, but considers that steel-making increases smelting cost because of carbon drop, and C controls 0.040 ~ 0.080%.Therefore the present invention designs welding wire C content is 0.010 ~ 0.050%.
(2) Mn:Mn is austenite stabilizer element, the phase transition temperature that remarkable reduction γ → α changes, the Main Function of Mn is the stability increasing overcooling austenite, austenite phase transformation is made to shift to lower temperature, eutectoid reaction is carried out under lower concentration of carbon, suppresses it at relatively high temperatures to polygonal ferrite (PF) phase transformation, in common weld metal cooling (800 ~ 500 DEG C, 3 ~ 30 DEG C/s) time, Mn can suppress austenite to pearlitic transformation.The yield strength of weld metal and tensile strength raise with Mn content linearly to be increased, often increasing 0.01%Mn can make the yield strength of weld seam and tensile strength increase 10MPa, although and Mn does not increase the room temperature impact toughness of Gao Gang, significantly reduces brittle transition temperature.The beneficial effect of Mn is that it can be combined into manganese sulfide with sulphur, makes the sulphur part in weld metal enter slag, plays the effect of desulfurization, and residual manganese sulfide is not deposited in crystal boundary, secondly manganese refinement tissue of weld metal.When Mn, Si exist, along with the increase of Mn/Si content simultaneously, phase transition temperature can be made to reduce gradually, structure refinement, but Si significantly improves pearlitic transformation temperature, form comparatively thick carbide at a higher temperature, so just impel the precipitation of polygonal ferrite unfavorable to toughness.The present invention designs Mn content and controls 1.800 ~ 2.100%.
(3) Si:Si is conducive to welding pool deoxidizing metals, in low-alloy steel submerged-arc welding seam, mass fraction be 0.15 ~ 0.3% Si content it can be made to reach the highest notch impact toughness.During submerged-arc welding, if ooze Si by solder flux, in weld metal, Si reaches as high as 0.8%, in this case, even if Mn/Si ratio is greater than 3, in weld metal, nonmetallic notch impact toughness also can decline, this is owing to the increase along with Si content, and in weld metal, non-metallic inclusion (as silicate) increases, as Si remains in the scope of 0.15 ~ 0.25%, then higher Mn/Si ratio (Mn/Si is than ﹥ 3), can make the impact flexibility of weld metal significantly improve.Therefore the present invention designs welding wire Si content range and controls 0.010 ~ 0.020%.
(4) Mo:Mo can reduce γ phase region, forms strong carbide, and Main Function postpones pro-eutectoid ferrite change and be conducive to being formed bainite structure, and Mo is solid-solution in austenite or exists with the form of carbide in weld seam, and suppresses perlitic transformation consumingly.Along with Mo content increases, organizing by pearlite-bainite transformation is the single bainite containing bainite type ferrite and equally distributed martensite-austenite island, it can improve the toughness of Plate Welding heat affected area (HAZ), research shows: when Mo content is 0.2 ~ 0.3% time, this improvement can be more obvious, and armor plate strength and low-temperature flexibility all fine.When Mn content is 1.2%, the Mo adding 0.15% can make acicular ferrite content in weld seam be increased to 85% from 45%, and acicular ferrite crystal grain is tiny especially, but when Mn content drops to 0.8%, increase Mo and can not change acicular ferrite content, and promote that ferrite side plate is formed.Mo can be used as hardening agent and uses in bainitic steel weld seam, and adding of a small amount of Mo can improve notch impact toughness, reduces brittle transition temperature, but general Mo content is less than 0.5%.The present invention designs Mo content range and controls 0.400 ~ 0.800%.
(5) Ni:Ni is infinitely solid-solution in γ-Fe, is the element expanding γ phase region.Ni can reduce dislocation motion drag in dot matrix and dislocation and interstitial element reciprocation energy, promotes stress relaxation, thus reduces brittle fracture tendency.Improve the Ni content in bainitic steel weld metal, can ensure to be issued to high tenacity in higher tensile strength.Meanwhile, Ni produces certain invigoration effect to bainitic steel weld metal, and additional mass mark is the Ni of 1%, and the yield strength of weld metal can improve 20 ~ 50MPa.In Hi-Stren steel weld seam, the optimum range of Ni content is 0.8 ~ 1.6%.Therefore welding wire Ni content range of the present invention is 1.000 ~ 1.500%.
(6) Cr:Cr is the element expanding γ phase region, reduces γ → α phase transformation critical-temperature, austenite is changed and carries out at a lower temperature, and the hardness of weld metal is cumulative with the increase of Cr content, as Cr ﹥ 0.5%, can have a negative impact to toughness.Cr content range of the present invention controls 0.100 ~ 0.400%.
(7) Cu:Cu reduces γ phase transition temperature element, increases the stability of overcooling austenite, reduces martensite and starts transition point (M
s).When in weld seam, Cu content is in 0.03% ~ 0.89% scope, along with the increase of Cu content, acicular ferrite (AF) quantity reduces, and grain boundary ferrite quantity increases, grain refinement, in fact Cu Main Function in Hi-Stren steel is used to improve weather-resistant.In bainitic steel, Cu content 0.025% can improve corrosion resistance, higher than 0.25% time, adds more Cu and can not continue to improve the corrosion resistance of steel, therefore control Cu is in 0.2 ~ 0.3%.Therefore in the present invention, Cu content range controls 0.200 ~ 0.300%.
(8) Ti:Ti is the element reducing γ phase region, is strong deoxidier and Ti(C, N) forming element, these high melting compound particles can as crystallization nuclei, refinement weld grain, when general Ti content is less than 0.003%, along with the increase of Ti content, acicular ferrite quantity increases.The effect of Ti in bainitic steel weld metal is similar to vanadium, also can improve the tensile strength of weld metal significantly, and produces wholesome effect to raising notch impact toughness, and in weld metal, most suitable Ti content depends on its strength grade and the content of oxygen.As in the weld metal of moderate strength, best Ti content is about 0.1%, and in high strength weld seam, Ti content be 0.015% weld metal toughness best.The present invention designs Ti content range and controls 0.150 ~ 0.450%.
(9) B:B obviously can suppress the forming core of ferrite on austenite grain boundary, and ferritic transformation curve is obviously moved to right, and makes bainite transformation curve become flat simultaneously, just can obtain bainite structure in larger cooling range; B also can refinement seam organization, there is strong reciprocation, do not have enough Ti in weld seam between B and Ti, and the Beneficial Effect of B is little, and will promote that upper bainite is formed when B and Ti too high levels, Ti, B again can not be too high thus.In the present invention, B content range controls 0.005 ~ 0.010%.
(10) Nb: high makes austenitic stability increase containing Nb amount, overcooling austenite is changed to cryo tissue, but its content worsens impact flexibility again, brittle transition temperature is raised, should limit Nb content and be less than 0.05%.The present invention designs Nb content range and controls 0.020 ~ 0.040%.
(11) Re: rare earth Re plays purification impurity in weld seam, going bad is mingled with and Microalloying Effect, is more be conducive to improving toughness plasticity, comprehensively can plays the strengthening effect of Mo, Ti, B.Re content range of the present invention controls 0.100 ~ 0.250%.
The manufacturing process of above-mentioned bainitic steel high-strength and high ductility welding wire for submerged-arc welding, specifically comprises the following steps:
Selecting and removing the pure iron of iron rust is welding wire steel, carries out ingot smelting, refining obtains smelting solder wire material in vacuum induction furnace; Be forged into square billet, remove the blemish such as surperficial casting skin and crackle; Billet rolling is become wire rod, carries out drawing (drawing step: wire rod-mechanical descaling-pickling derusts-dry-dry wire drawing-batch-heat treatment-dry wire drawing-batch-electroless copper-polishing-batch-be wound in silk) and make welding wire.This welding wire is composed of the following components by mass percentage: C0.010 ~ 0.050%, Mn1.800 ~ 2.100%, Mo0.400 ~ 0.800%, Ti0.150 ~ 0.450%, B0.005 ~ 0.010%, Ni1.000 ~ 1.500%, Cu0.200 ~ 0.300%, Si0.010 ~ 0.020%, Nb0.020 ~ 0.040%, Cr0.100 ~ 0.400%, Re0.100 ~ 0.250%, P<0.005%, S<0.003%, surplus is Fe, and above-mentioned each constituent mass percentage sum is 100%.
Test piece for welding is bainitic steel, and specification is 500mm × 155mm × 15mm, and its Main Ingredients and Appearance (mass fraction, %) is: 0.044C, 0.22Si, 1.95Mn, 0.39Ni, 0.014Ti, 0.21Cu, 0.09Nb, Fe surplus, and thickness is 15mm.Its tensile strength is 868MPa, and yield strength is 745MPa, and percentage elongation is that to absorb merit be 213J to the average Charpy impact (Charpy) of 24.2%, 20 DEG C.
Adopt above-mentioned welding wire, coordinate sintered flux SJ101 as welding material, use MZ-1000 type automatic welder(welding machine) to carry out submerged-arc welding to test plate (panel).
Bainitic steel high-strength and high ductility welding wire for submerged-arc welding of the present invention, has the following advantages:
Welding wire of the present invention mates with sintered flux SJ101 welding wire, and for domestic bainitic steel submerged-arc welding, the tissue of weld seam is mainly the line and staff control of bainite ferrite and granular bainite, the black carbon compound containing a small amount of Dispersed precipitate; The tensile strength sigma of weld seam
b>=790Mpa, impact flexibility mean value>=170J, percentage elongation mean value>=15%, the contraction percentage of area>=65%.Excellent combination property, ensure that its application at industrial circle;
Welding wire of the present invention mates with sintered flux SJ101 welding wire, has good processing performance: striking and stabilising arc functional, deslag performance is excellent, and welding bead uniform in shaping is attractive in appearance;
The present invention is applicable to Large Heat Input Welding, not preheating before weldering, and postwelding does not process.Namely be applicable to individual layer multilayer, be also applicable to single or double welding;
Welding wire of the present invention adopts the principle design of microalloying, and development technology is simple, with low cost, is applicable to producing and industrialization.
Embodiment 1
Selecting and removing the pure iron of iron rust is welding wire steel, carries out ingot smelting, refining obtains smelting solder wire material in vacuum induction furnace; Be forged into square billet, remove the blemish such as surperficial casting skin and crackle; Billet rolling is become wire rod, carries out drawing (drawing step: wire rod-mechanical descaling-pickling derusts-dry-dry wire drawing-batch-heat treatment-dry wire drawing-batch-electroless copper-polishing-batch-be wound in silk) and make welding wire.This welding wire is composed of the following components by mass percentage: C0.010%, Mn1.800%, Mo0.400%, Ti0.150%, B0.006%, Ni1.200%, Cu0.200%, Si0.012%, Nb0.030%, Cr0.400%, Re0.200%, P0.003%, S0.002%, surplus is Fe, and above-mentioned each constituent mass percentage sum is 100%.
Test piece for welding groove adopts I type groove, adopts above-mentioned welding wire, coordinates sintered flux SJ101 as welding material, and use MZ-1000 type automatic welder(welding machine) to carry out docking double-submerged arc to it, welding condition is as shown in table 1.
Table 1 welding condition
The mechanical property of Welded Joints is tested, result is as shown in table 2, and Welded Joints carries out metallographic experiment, Weld pipe mill metallographic structure as shown in Figure 1, the tissue of bainitic steel Weld pipe mill is mainly acicular ferrite (AF) and granular bainite (GB), and acicular ferrite presents a specific admixture distribution form and fine microstructures.This random tiny slip bundle be interspersed each other can improve its obdurability effectively, and the Dispersed precipitate of tiny granular bainite further enhancing again its performance.
The mechanical property of table 2 welding point
Embodiment 2
The pure iron removing iron rust is selected to be that welding wire steel carries out ingot smelting in vacuum induction furnace, refining obtains smelting solder wire material; Be forged into square billet, remove the blemish such as surperficial casting skin and crackle; Billet rolling is become wire rod, carries out drawing (drawing step: wire rod-mechanical descaling-pickling derusts-dry-dry wire drawing-batch-heat treatment-dry wire drawing-batch-electroless copper-polishing-batch-be wound in silk) and make welding wire.This welding wire is composed of the following components by mass percentage: C0.040%, Mn2.000%, Mo0.700%, Ti0.300%, B0.007%, Ni1.500%, Cu0.250%, Si0.010%, Nb0.020%, Cr0.100%, Re0.200%, P0.004%, S0.001%, surplus is Fe, and above-mentioned each constituent mass percentage sum is 100%.
Test piece for welding groove adopts I type groove, adopts above-mentioned welding wire, coordinates sintered flux SJ101 as welding material, and use MZ-1000 type automatic welder(welding machine) to carry out docking double-submerged arc to it, welding condition is as shown in table 3.
Table 3 welding condition
The mechanical property of Welded Joints is tested, result is as shown in table 4, and Welded Joints carries out metallographic experiment, and Weld pipe mill metallographic structure as shown in Figure 2, the microscopic structure of weld seam is mainly acicular ferrite (AF) and granular bainite (GB), has the black carbon compound of a small amount of Dispersed precipitate.Acicular ferrite distribution interlaced with each other, tiny granular bainite is uniformly distributed on its matrix, adds the resistance of dislocation movement, can effectively improve its obdurability.
The mechanical property of table 4 welding point
Embodiment 3
The pure iron removing iron rust is selected to be that welding wire steel carries out ingot smelting in vacuum induction furnace, refining obtains smelting solder wire material; Be forged into square billet, remove the blemish such as surperficial casting skin and crackle; Billet rolling is become wire rod, carries out drawing (drawing step: wire rod-mechanical descaling-pickling derusts-dry-dry wire drawing-batch-heat treatment-dry wire drawing-batch-electroless copper-polishing-batch-be wound in silk) and make welding wire.This welding wire is composed of the following components by mass percentage: C0.030%, Mn2.100%, Mo0.600%, Ti0.450%, B0.005%, Ni1.000%, Cu0.200%, Si0.015%, Nb0.040%, Cr0.300%, Re0.100%, P0.002%, S0.001%, surplus is Fe, and above-mentioned each constituent mass percentage sum is 100%.
Test piece for welding groove adopts Y type groove (groove 60 ± 3 °), adopts above-mentioned welding wire, coordinates sintered flux SJ101 as welding material, and use MZ-1000 type automatic welder(welding machine) to carry out docking double-submerged arc to it, welding condition is as shown in table 5.
Table 5 welding condition
The mechanical property of Welded Joints is tested, result is as shown in table 6, and Welded Joints carries out metallographic experiment, Weld pipe mill metallographic structure as shown in Figure 3, the tissue of Weld pipe mill is mainly acicular ferrite (AF) and granular bainite (GB), and acicular ferrite is with the existence of " basketry woollen yarn knitting " state, and tiny granular bainite is distributed on its matrix, effectively can hinder the expansion of crackle, improve its obdurability.
The mechanical property of table 6 welding point
Embodiment 4
The pure iron removing iron rust is selected to be that welding wire steel carries out ingot smelting in vacuum induction furnace, refining obtains smelting solder wire material; Be forged into square billet, remove the blemish such as surperficial casting skin and crackle; Billet rolling is become wire rod, carries out drawing (drawing step: wire rod-mechanical descaling-pickling derusts-dry-dry wire drawing-batch-heat treatment-dry wire drawing-batch-electroless copper-polishing-batch-be wound in silk) and make welding wire.This welding wire is composed of the following components by mass percentage: C0.040%, Mn1.900%, Mo0.800%, Ti0.400%, B0.008%, Ni1.400%, Cu0.300%, Si0.010%, Nb0.030%, Cr0.400%, Re0.250%, P0.003%, S0.001%, surplus is Fe, and above-mentioned each constituent mass percentage sum is 100%.
Test piece for welding groove adopts I type groove (groove 60 ± 3 °), adopts above-mentioned welding wire, coordinates sintered flux SJ101 as welding material, and use MZ-1000 type automatic welder(welding machine) to carry out docking double-submerged arc to it, welding condition is as shown in table 7.
Table 7 welding condition
The mechanical property of Welded Joints is tested, and result is as shown in table 8.
The mechanical property of table 8 welding point
Embodiment 5
The pure iron removing iron rust is selected to be that welding wire steel carries out ingot smelting in vacuum induction furnace, refining obtains smelting solder wire material; Be forged into square billet, remove the blemish such as surperficial casting skin and crackle; Billet rolling is become wire rod, carries out drawing (drawing step: wire rod-mechanical descaling-pickling derusts-dry-dry wire drawing-batch-heat treatment-dry wire drawing-batch-electroless copper-polishing-batch-be wound in silk) and make welding wire.This welding wire is composed of the following components by mass percentage: C0.050%, Mn1.900%, Mo0.600%, Ti0.300%, B0.010%, Ni1.300%, Cu0.200%, Si0.020%, Nb0.020%, Cr0.100%, Re0.200%, P0.004%, S0.002%, surplus is Fe, and above-mentioned each constituent mass percentage sum is 100%.
Test piece for welding groove adopts Y type groove (groove 60 ± 3 °), adopts above-mentioned welding wire, coordinates sintered flux SJ101 as welding material, and use MZ-1000 type automatic welder(welding machine) to carry out docking double-submerged arc to it, welding condition is as shown in table 9.
Table 9 welding condition
The mechanical property of Welded Joints is tested, and result is as shown in table 10.
The mechanical property of table 10 welding point
Present stage, submerged-arc welding mainly adopts H08C welding wire and H03Mn welding wire, when its to mate with sintered flux SJ101 carry out submerged arc welding bainitic steel time, the average mechanical property of welding point is shown in Table 11.Welding wire mechanical property of the present invention is compared with result shown in table 11, remain basically stable in percentage elongation and the contraction percentage of area, the weld seam average tensile strength adopting welding wire of the present invention to weld is minimum is 793Mpa, average impact toughness value is minimum is 174J, and adopt H08C welding wire and H03Mn welding wire to weld the average tensile strength obtained to be respectively 763Mpa, 792Mpa, impact flexibility is Wei 113J, 137J, during visible wire submerged arc welding bainitic steel of the present invention, there is excellent combination property, its application at industrial circle can be ensured.
The mechanical property of the existing welding wire for submerged-arc welding welding point of table 11
Claims (1)
1. a bainitic steel high-strength and high ductility welding wire for submerged-arc welding, it is characterized in that, composed of the following components by mass percentage: C0.010 ~ 0.050%, Mn1.800 ~ 2.100%, Mo0.400 ~ 0.800%, Ti0.150 ~ 0.450%, B0.005 ~ 0.010%, Ni1.000 ~ 1.500%, Cu0.200 ~ 0.300%, Si0.010 ~ 0.020%, Nb0.020 ~ 0.040%, Cr0.100 ~ 0.400%, Re0.100 ~ 0.250%, P<0.005%, S<0.003%, surplus is Fe, and above-mentioned each constituent mass percentage sum is 100%.
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| CN103600178B (en) * | 2013-11-27 | 2016-08-17 | 中车眉山车辆有限公司 | A kind of high-strength weathering steel gas shield solid core welding wire |
| CN104002059B (en) * | 2014-06-11 | 2016-09-28 | 江苏省沙钢钢铁研究院有限公司 | A kind of welding wire for submerged-arc welding and welding method |
| CN104722949A (en) * | 2015-02-02 | 2015-06-24 | 温州大学 | Solid-core welding wire for reducing welding residual stress of high-strength steel |
| CN105414799A (en) * | 2015-12-23 | 2016-03-23 | 宜昌猴王焊丝有限公司 | Solid cored welding wire of low-alloy and high-strength steel and application of solid cored welding wire |
| CN107900555B (en) * | 2017-12-18 | 2020-04-21 | 武汉钢铁有限公司 | Welding wire for 630MPa grade high Nb steel double-channel submerged arc welding |
| CN111673313A (en) * | 2020-06-04 | 2020-09-18 | 江苏省沙钢钢铁研究院有限公司 | Gas shielded welding wire with fire-resistant and weather-resistant characteristics |
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| CA2231985C (en) * | 1997-03-26 | 2004-05-25 | Sumitomo Metal Industries, Ltd. | Welded high-strength steel structures and methods of manufacturing the same |
| CN1285444C (en) * | 2004-12-06 | 2006-11-22 | 西安理工大学 | Solder wire material of submerged-arc welding for high grade pipeline steel |
| 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 |
| CN100469513C (en) * | 2007-09-12 | 2009-03-18 | 钢铁研究总院 | High-strength gas-defended welding wire material |
| CN101549443A (en) * | 2009-05-08 | 2009-10-07 | 西安理工大学 | Submerged arc welding wire material for X80 pipeline steel and preparing method thereof |
| CN101905392B (en) * | 2010-08-26 | 2012-04-25 | 宜昌猴王焊丝有限公司 | High-toughness low-alloy solid welding wire |
| CN102019516A (en) * | 2010-11-01 | 2011-04-20 | 西安理工大学 | Solder wire for submerged arc welding of X100 pipeline steel and preparation method thereof |
| CN103056550B (en) * | 2012-12-25 | 2016-03-09 | 中国船舶重工集团公司第七二五研究所 | A kind of welding wire for gas shielded welding of yield strength 900MPa rank |
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