CN101898285A - Solid-cored welding wire for gas shielded welding of 70kg-level high-strength structural steel - Google Patents
Solid-cored welding wire for gas shielded welding of 70kg-level high-strength structural steel Download PDFInfo
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Abstract
The invention discloses a solid-cored welding wire for gas shielded welding of low-carbon 70kg-level high-strength structural steel, which is suitable for welding of high-strength steel structures with the same level. The welding wire of the invention comprises components in percentage by weight: 0.03%-0.10% of C, 1.35%-2.00% of Mn, 0.50%-0.90% of Si, 0.40%-1.00% of Ni, 0.20%-1.50% of Mo, 0.10%-0.30% of Cu, 0.020%-0.10% of Nb, 0.002%-0.010% of V, 0.001%-0.005% of Al, 0.010% of S, 0.015% of P and the balance of Fe. The welding wire of the invention is used in CO2 gas shielded welding, has low cost in welding operation, and can be widely applicable to industries of engineering machinery, coal mine machinery, bridge construction and the like.
Description
Technical field
The present invention relates to a kind of low-carbon (LC) 70 kilogram level high-tensile structural steel shield-arc welding solid core welding wires, belong to field of welding material.
Background technology
In recent years, smelt the continuous progress of rolling technique along with steel, steel develop to high strength, high tenacity direction gradually, Hi-Stren steel is a kind of have excellent low-temperature impact toughness and very high steel of intensity, use this steel can reduce material consumption, alleviate construction weight, improve security.Be used for the solid welding wire of 70 kilograms of intensity ranks of this low-alloy high-strength steel structure at present, the content of its alloying element is higher, because these alloying elements all are valuable metallic elements generally, thereby causes manufacturing cost higher; The protective gas that this class welding wire adopts when welding is argon-rich gas shielded substantially, and the price of argon-rich gas is far above CO
2Gas, thereby cause user's use cost higher.Simultaneously, it is serious that the composition of weld line segregation also appears in this class welding wire easily, easily cause the generation of crackle tendency and influence welding quality, be inclined in order to reduce this crackle during welding at present, before welding, need mother metal to be carried out welding again after the preheating earlier, though increased difficulty of construction, the crackle tendency still can not be eliminated.
Summary of the invention
The purpose of this invention is to provide a kind of technical indicator performance and welding technological properties is good, manufacturing cost is cheap is used for the solid core welding wire of 70 kilograms of intensity rank low-alloy high-strength steel structures welding.
Purpose of the present invention is achieved through the following technical solutions:
The percentage by weight of welding wire of the present invention consists of: C:0.03%～0.10%, Mn:1.35～2.00%, Si:0.50%～0.90%, Ni:0.40%～1.00%, Mo:0.20%～1.50%, Cu:0.10%～0.30%, Ti:0.020%～0.10%, Nb:0.002%～0.010%, V:0.002%～0.010%, Al:0.001%～0.005%, S:0.010%, P:0.015%, surplus is Fe, each composition weight sum is 100%.
In order to obtain better effect, preferred C:0.082%, Mn:1.76%, Si:0.45%, Ni:0.88%, Mo:0.28%, Cu:0.25%, Ti:0.015%, Nb:0.005%, V:0.004%, Al:0.001%, S:0.008%, P:0.013%, surplus is Fe, and each composition weight sum is 100%.
Or preferred C:0.065%, Mn:1.58%, Si:0.32%, Ni:0.90%, Mo:0.90%, Cu:0.20%, Ti:0.10%, Nb:0.004%, V:0.003%, Al:0.002%, S:0.008%, P:0.012%, surplus is Fe, each composition weight sum is 100%.
Welding wire of the present invention does not have specific (special) requirements in preparation, adopt general manufacturing process in the industry, through electric furnace smelting, again through forging, hot rolling, annealing, wire drawing, copper facing, twine operations such as axle, packing and can realize.Specifically, welding wire of the present invention meets the requirements with the composition that ensures the finished product welding wire through the check of strictness after wire rod is made in electric furnace smelting, forging, hot rolling, annealing, and the wire rod that is up to the standards is made welding wire through following steps; The first step: remove the oxide skin operation that annealing is generated, comprise that machinery is removed and chemistry is removed; Second step: hot candied operation is about to wire rod through pulling out greatly and going into the semi-finished product welding wire that carefully pulls out to required diameter; The 3rd step: the semi-finished product welding wire through operations such as pickling, alkali cleanings, is removed the unholiness thing of its remained on surface, guarantee carrying out smoothly of copper facing operation; The 4th step: the copper facing operation mainly is an electroless copper, and promptly welding wire is by certain density CuSO
4Solution, thus make welding wire surface plate layer of copper equably; The 5th step: washing and baking operation make the welding wire surface clean dried.At last, welding wire can be finished the manufacture process of welding wire through twining axle, packaging process.
The main effect of each element in the welding wire of the present invention:
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, so in welding wire, want the content of strict control carbon, the C content in the welding wire be controlled between 0.03%～0.10%.
Si is as main deoxidant element, and an amount of Si can improve the yield strength 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%.
Add Mn, Mo element,, improved the intensity of weld metal on the one hand by the solution strengthening effect, Mn, Mo element have been postponed the transition temperature of austenite structure on the other hand, promoted the formation of needle-like voxel volume, refinement weld structure, improved the low-temperature impact toughness of weld metal.Mn content in the welding wire is controlled between 1.35%～2.00%, the Mo content in the welding wire is controlled between 0.20%～1.50%.
Ni is the key factor that improves welding seam toughness, and the adding of Ni has improved the impact flexibility of weld metal, particularly low-temperature impact toughness, reduces the addition of Ni element and has saved production cost of products, and Ni content is controlled between 0.40%～1.00%.
A spot of Cu not only can consolidate dark strengthen welds metal, and has improved the decay resistance of weld metal, can reduce the arc stability of welding when the Cu constituent content is too high, and easily produces heat cracking in welding.
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.
Make grain refinement by a spot of interpolation Ti, V element, improve the toughness of weld metal, improve welding operation technology.
Advantage of the present invention and characteristics are:
1. the intensity of the weld metal of welding wire of the present invention and toughness strengthen, and have reduced the crackle tendency and have produced.Tensile strength Rm 〉=the 700MPa of welding wire gained deposited metal of the present invention, yield strength 610MPa～700MPa, low-temperature impact toughness A
Kv(20 ℃) 〉=140J, A
Kv(40 ℃) 〉=100J, A
Kv(60 ℃) 〉=75J.
2. welding wire of the present invention has reduced the addition of alloying element, has saved valuable metallic element resource, has reduced cost of goods manufactured.
3. the degree of splashing when welding wire of the present invention has reduced welding improves welding operation technology.
4. welding wire of the present invention adopts CO
2The gas shield welding is with abundant, the cheap CO of reserves
2Gas instead argon-rich gas; Simultaneously in welding process, need not mother metal is carried out preheating, greatly reduce the running cost of welding.
The specific embodiment
In order to understand the present invention, further specify the present invention with embodiment below, but do not limit the present invention.
Embodiment 1
Get each component by following weight ratio, C 0.082%, and Mn 1.76%, and Si 0.45%, and Ni 0.88%, and Mo 0.28%, and Cu 0.25%, and Ti 0.015%, and Nb 0.005%, and V 0.004%, and Al 0.001%, and S 0.008%, and P 0.013%, and Fe 96.252%; Adopt general manufacturing process in the wlding industry, through electric furnace smelting, again through forging, hot rolling, annealing, wire drawing, copper facing, twine operation such as axle, be processed into the finished product welding wire of diameter 1.2mm.
Embodiment 2
Get each component by following weight ratio, C 0.070%, and Mn 1.74%, Si 0.55%, and Ni 0.98%, and Mo 0.39%, Cu 0.094%, and Ti 0.092%, and Nb 0.008%, V 0.008%, and Al 0.002%, and S 0.008%, P 0.010%, Fe 96.048%, according to embodiment 1 operation, makes welding wire of the present invention.
Embodiment 3
Get each component by following weight ratio, C 0.080%, and Mn 1.65%, Si 0.70%, and Ni 0.78%, and Mo 1.00%, Cu0.15%, Ti 0.085%, and Nb 0.005%, V 0.005%, and Al 0.001%, and S 0.007%, P 0.013%, Fe96.224% according to embodiment 1 operation, makes welding wire of the present invention.
Embodiment 4
Get each component by following weight ratio, C 0.065%, and Mn 1.58%, Si 0.32%, and Ni 0.90%, and Mo 0.90%, Cu 0.20%, and Ti 0.10%, and Nb 0.004%, V 0.003%, and Al 0.002%, and S 0.008%, P 0.012%, Fe95.906% according to embodiment 1 operation, makes welding wire of the present invention.
Test routine 1-4
The welding wire that embodiment 1-4 is made carries out soldering test, and the mechanical property of gained deposited metal is as shown in table 1.
The mechanical property of table 1 embodiment welding wire deposited metal
| 1 | 780 | 700 | 19 | 144 | 105 | 76 |
| 2 | 750 | 680 | 20.2 | 145 | 110 | 80 |
| 3 | 720 | 650 | 19.5 | 140 | 102 | 75 |
| 4 | 765 | 690 | 18.8 | 147 | 115 | 80 |
Claims (3)
1. kilogram level high-tensile structural steel gas shielded arc welding solid welding wire; The percentage by weight that it is characterized in that welding wire consists of: C:0.03%～0.10%, Mn:1.35～2.00%, Si:0.50%～0.90%, Ni:0.40%～1.00%, Mo:0.20%～1.50%, Cu:0.10%～0.30%, Ti:0.020%～0.10%, Nb:0.002%～0.010%, V:0.002%～0.010%, Al:0.001%～0.005%, S:0.010%, P:0.015%, surplus is Fe, each composition weight sum is 100%.
2. a kind of 70 kilogram level high-tensile structural steels gas shielded arc welding solid welding wire according to claim 1; The percentage by weight that it is characterized in that welding wire consists of C:0.082%, Mn:1.76%, Si:0.45%, Ni:0.88%, Mo:0.28%, Cu:0.25%, Ti:0.015%, Nb:0.005%, V:0.004%, Al:0.001%, S:0.008%, P:0.013%, surplus is Fe, each composition weight sum is 100%.
3. a kind of 70 kilogram level high-tensile structural steels gas shielded arc welding solid welding wire according to claim 1; The percentage by weight that it is characterized in that welding wire consists of C:0.065%, Mn:1.58%, Si:0.32%, Ni:0.90%, Mo:0.90%, Cu:0.20%, Ti:0.10%, Nb:0.004%, V:0.003%, Al:0.002%, S:0.008%, P:0.012%, surplus is Fe, each composition weight sum is 100%.
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| CN2010102255685A CN101898285B (en) | 2010-07-14 | 2010-07-14 | Gas shielded welding solid welding wire for 70 kg-level high-strength structural steel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513725A (en) * | 2011-12-13 | 2012-06-27 | 南京钢铁股份有限公司 | Steel wire rod for annealing-free solder wire and production process thereof |
| CN103495815A (en) * | 2013-09-30 | 2014-01-08 | 中联重科股份有限公司 | Welding material, application thereof and welding method |
| CN109108216A (en) * | 2018-09-20 | 2019-01-01 | 中冶宝钢技术服务有限公司 | Welding lead stamp and manufacturing process and casting process for lead liquid casting |
| CN111571060A (en) * | 2020-04-23 | 2020-08-25 | 武汉铁锚焊接材料股份有限公司 | Special 70 kg-level high-strength high-toughness gas-shielded solid welding wire for coal machine industry |
| CN112222679A (en) * | 2020-10-20 | 2021-01-15 | 天津市永昌焊丝有限公司 | Low-nickel high-strength high-toughness gas-shielded solid welding wire |
| CN115502609A (en) * | 2022-10-14 | 2022-12-23 | 成都先进金属材料产业技术研究院股份有限公司 | Niobium-titanium-containing welding wire steel for high-strength steel welding wire for water and high-strength steel and production method thereof |
| CN115502610A (en) * | 2022-10-14 | 2022-12-23 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire steel wire containing vanadium and titanium for high-strength steel, welding wire for high-strength steel and production method of welding wire |
| CN115558860A (en) * | 2022-10-14 | 2023-01-03 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire for high-strength steel containing vanadium and niobium, welding wire for high-strength steel and production method of welding wire |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102513725A (en) * | 2011-12-13 | 2012-06-27 | 南京钢铁股份有限公司 | Steel wire rod for annealing-free solder wire and production process thereof |
| CN103495815A (en) * | 2013-09-30 | 2014-01-08 | 中联重科股份有限公司 | Welding material, application thereof and welding method |
| CN103495815B (en) * | 2013-09-30 | 2015-10-28 | 中联重科股份有限公司 | Welding material, application thereof and welding method |
| CN109108216A (en) * | 2018-09-20 | 2019-01-01 | 中冶宝钢技术服务有限公司 | Welding lead stamp and manufacturing process and casting process for lead liquid casting |
| CN111571060A (en) * | 2020-04-23 | 2020-08-25 | 武汉铁锚焊接材料股份有限公司 | Special 70 kg-level high-strength high-toughness gas-shielded solid welding wire for coal machine industry |
| CN111571060B (en) * | 2020-04-23 | 2022-04-22 | 武汉铁锚焊接材料股份有限公司 | Special 70 kg-level high-strength high-toughness gas-shielded solid welding wire for coal machine industry |
| CN112222679A (en) * | 2020-10-20 | 2021-01-15 | 天津市永昌焊丝有限公司 | Low-nickel high-strength high-toughness gas-shielded solid welding wire |
| CN112222679B (en) * | 2020-10-20 | 2022-04-22 | 天津市永昌焊丝有限公司 | Low-nickel high-strength high-toughness gas-shielded solid welding wire |
| CN115502609A (en) * | 2022-10-14 | 2022-12-23 | 成都先进金属材料产业技术研究院股份有限公司 | Niobium-titanium-containing welding wire steel for high-strength steel welding wire for water and high-strength steel and production method thereof |
| CN115502610A (en) * | 2022-10-14 | 2022-12-23 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire steel wire containing vanadium and titanium for high-strength steel, welding wire for high-strength steel and production method of welding wire |
| CN115558860A (en) * | 2022-10-14 | 2023-01-03 | 成都先进金属材料产业技术研究院股份有限公司 | Welding wire for high-strength steel containing vanadium and niobium, welding wire for high-strength steel and production method of welding wire |
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Assignee: Tianjin Daqiao Welding Wire Co., Ltd. Assignor: Tianjin Bridge Welding Materials Group Co., Ltd. Contract record no.: 2012120000012 Denomination of invention: Solid-cored welding wire for gas shielded welding of 70kg-level high-strength structural steel License type: Exclusive License Open date: 20101201 Record date: 20120313 |
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Effective date of registration: 20190429 Address after: 300385 No. 17 Chuyuan Road, Xiqing District, Tianjin Patentee after: Tianjin Daqiao Welding Wire Co., Ltd. Address before: 300385 Tianjin Jingang Economic Development Zone Xiqing Road No. 2 Patentee before: Tianjin Bridge Welding Materials Group Co., Ltd. |
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