CN100475422C - Gas protection solder for steel - Google Patents
Gas protection solder for steel Download PDFInfo
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- CN100475422C CN100475422C CNB2007100417043A CN200710041704A CN100475422C CN 100475422 C CN100475422 C CN 100475422C CN B2007100417043 A CNB2007100417043 A CN B2007100417043A CN 200710041704 A CN200710041704 A CN 200710041704A CN 100475422 C CN100475422 C CN 100475422C
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Abstract
The invention relates to a steel used gas protective welding wire. Its composition is as follows: C: 0. 003%-0. 04%; Mn: 1. 5%-3%; Si: 0. 02%-0. 4%; Ni: 2%-6%; Mo: 1%-3. 2%; Ti: 0%-0. 4%; Cr: 0. 01%-0. 6%; Cu: 0. 2%-0. 4%; Mg: 0%-0. 1%; S: <=0. 01%; P: <=0. 02%, with the rest being Fe. The invented welding juncture has fine comprehensive feature, particularly high strength, and fine low temperature flexibility. The low hardness is beneficial to corrosion resistance.
Description
Technical field
What the present invention relates to is a kind of welding material of welding technology field, particularly a kind of gas protection wire for steel.
Background technology
In the prior art, along with the progress of metallurgical technology makes the steel of smelting ultralow-carbon and high-cleanness, high become possibility, develop steel grade of new generation high evenness, ultra-fine grain, high-strength and high-ductility, the development of this steel grade is comparatively fast developed in Japan, Korea S, European Union, China and other countries with exploitation the application success of microalloying, working hardening theory and material composition, tissue, property relationship achievement in research.But comparatively speaking, the microstructure and property of welding point is the relatively weaker link of total.Because the cleanliness factor of weld metal is low, organize thick, there is the inhomogeneities on tissue and the chemical composition, and the obdurability of weld metal can only be realized by alloying and organizational controls, along with other increase of strength of materials level, to further improve the intensity (more than the 700MPa) of weld seam, must cause the raising of welding seam alloying degree, such consequence causes weld metal to become fragile easily, and acicular ferrite weld metal commonly used is very sensitive to cooling velocity, and this brings difficulty for the regulation and control of joint microstructure and performance.This compares with the excellent properties of mother metal, realize with obdurability such as mother metal be very difficult, the intensity and the high tenacity that especially reach ferrous materials of new generation and had cooperate then difficulty more.
Find that by prior art documents publication number is the Chinese patent of CN1413795 disclosed " a Ultra-low carbon high-strength gas protecting welding wire material ": Ultra-low carbon high-strength gas protecting welding wire material, the intensity rank of its suitable steel are 700-800MPa.The yield strength of welding wire deposited metal is up to 790MPa, and tensile strength is up to 840Mpa, and tensile strength does not reach 900MPa as yet.This surpasses the high-strength steel of 900MPa for intensity, then can not meet design requirement at this welding wire of the occasion that requires high-strength coupling, need surpass strength of parent such as the strength of welded joint in the shipbuilding, and therefore the Ship Structure that needs to adopt the high-strength steel welding to make just is restricted.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of gas protection wire for steel is provided.This Ultra-low carbon, high strength gas protection wire can satisfy the high-intensity requirement of butt welded seam metal, can keep good low-temperature flexibility and soft again.
The present invention is achieved by the following technical solutions, and the mass percentage content of the overall material of each ingredients constitute of the present invention is respectively:
C：0.003％-0.04％；
Mn：1.5％-3％；
Si：0.02％-0.4％；
Ni：2％-6％；
Mo：1.0％-3.2％；
Ti：0％-0.4％；
Cr：0.01％-0.6％；
Cu：0.2％-0.4％；
Mg：0％-0.1％；
Control of Impurities is at S :≤0.01%, and P :≤0.02%;
Surplus is Fe.
Described Mg, its preferable range is: 0.004%-0.010% adds during for smelting.
Described welding wire can adopt argon tungsten-arc welding or Ar+1%-20%CO
2Gas shiled weldering, thus guarantee that weld metal has higher intensity and good low-temperature flexibility and low hardness.
Component design principle of the present invention is as follows:
(1) C content: although C is the important element of proof strength, but C has increased intensity on the one hand in the high-strength steel weld seam, but form crisp sclerous tissues easily and cause delayed crack, in order to prevent that this generation of defects from needing weld preheating, strict control interlayer temperature and adopting post weld heat treatment, increased the welding manufacturing cost.The content of C in the welding wire falls based on above reason as far as possible;
(2) Mn content: because the intensity that guarantees weld metal with Mn for C is adopted in weakening of C solution strengthening.In addition, the increase of Mn makes the more stable of overcooling austenite, impels weld metal generation lower bainite to change, and makes the intensity of lower bainite and martensite approaching, and toughness and plasticity are then good than martensite;
(3) Si content: Si in weld metal mainly as deoxidant element, also has certain solution strengthening effect, but Si reduces easily toughness in the Ultra-low carbon weld metal, so remain on the lower limit of component content during design under the condition that guarantees enough deoxidations as far as possible;
(4) Ni content; Ni strengthens austenitic stability on the one hand, guarantees the acquisition of lower bainite tissue, and is very favourable to low-temperature flexibility on the other hand, and Ni also has contribution to the raising of intensity;
(5) Mo content: consider the reduction significantly of carbon, although with Mn for C, in order to guarantee enough intensity, consider to add an amount of Mo proof strength, also utilize the improvement effect of Mo simultaneously to low-temperature flexibility;
(6) adding of Ti content: Ti mainly is to replenish deoxidation;
(7) Cu and Cr content: the resistance to corrosion that improves weld metal;
(8) Mg content: Mg has strong deoxidation effect on the one hand, thereby can remedy the unfavorable factor that Si content reduces the deoxidation deficiency, and Mg has the effect of strong enhancing grain-boundary strength and purification crystal boundary on the other hand, and Mg takes off the effect of S in addition in weld metal.This has very big benefit to plasticity, the toughness of improving weld metal.
Processing features of the present invention and application:
Under above-mentioned design principle, select suitable alloying element and pure iron proportioning to carry out vacuum metling, Mn, Ti, Mg add successively at last during smelting, and avoid evaporating adding fashionable employing inert gas shielding.After alloying element all melts 15-30 minute, water into ingot casting, again through forging, technologies such as rolling, dish unit and wire drawing make the finished product welding wire, the diameter of welding wire can be drawn into 1.2mm or 1.6mm as required.Because the present invention relates to the welding wire design object is that intensity rank surpasses 900MPa, so be well suited for being used to resemble the welding of high-strength hull steel material.Because contain Cu, Cr element in the design, the anti-stress corrosion performance when being on active service for Ship Structure is very useful; Can guarantee low-temperature flexibility owing to contain more Ni in addition; Because C content is lower, acquisition with high-strength tenacity ULCB tissue, this requirement to technologies such as the weld preheating in the welding work progress, interlayer temperature control and post weld heat treatment is not very strict, can save time and cost, and has reduced the expense that welding is reprocessed simultaneously yet.
Weld seam of the present invention has good comprehensive performances, particularly has very high intensity, but hardness is not high, also has good low-temperature toughness.Wherein low antagonism delay cracking destruction of hardness and the resistance to corrosion under corrosive environment are very favourable.Its combination property is: σ
s=881MPa-892MPa, σ
b=900MPa-954MPa, hardness is 260-280Hv, AKv
-20 ℃=44J, AKv
-40 ℃=38J-42J.
The specific embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The gas protection wire for steel of present embodiment, its deposited metal composition and content are (mass fraction %):
C：0.019％
Mn：2.0％
Si：0.33％
Ni：5.60％
Mo：2.5％
Ti：0.011％
Cr：；0.35％
Cu：0.34％
Mg：0.010％
S：0.0089％
P：0.010％
Surplus is Fe.
The manufacture process of present embodiment is: select pure iron for use, and suitable alloying element proportioning, carry out vacuum metling, do not add C during smelting, Mn, Mg add successively at last, and avoid evaporating adding fashionable employing inert gas shielding.Alloying element all fusing water into ingot casting after 20 minutes, again through forging, technologies such as rolling, dish unit and wire drawing make the finished product welding wire, the diameter of welding wire can be drawn into the welding wire of 1.2mm as required.
Welding of present embodiment welding wire deposited metal test plate (panel) and mechanical property test are all according to GB8110-87/95---and carbon dioxide gas shiled weldering is carried out with steel welding wire standard; test plate (panel) is the Q345 steel; size 450mm * 150mm * 20mm; 45 ° of bevel angles, separation layer thickness＞3mm, weldingvoltage: 27-31V; welding current: 260-290A; speed of welding: 5.5mm/s, interlayer temperature: 150 ℃, protective gas Ar+CO
2Mist, flow: 20-25L/min.Welding back deposited metal performance sees Table 1.
Embodiment 2
The gas protection wire for steel of present embodiment, its deposited metal composition and content are (mass fraction %):
C： 0.014％
Mn： 2.5％
Si：0.02％
Ni：5.6％
Mo：3.0％
Ti：0.019％
Cr：0.35％
Cu：0.35％
Mg：0.004％
S：0.0095％
P：0.009％
Surplus is Fe.
The present embodiment manufacture process is with embodiment 1.
Welding of present embodiment welding wire deposited metal test plate (panel) and mechanical property test are all according to GB8110-87/95---and carbon dioxide gas shiled weldering is carried out with steel welding wire standard; test plate (panel) is the Q345 steel; size 450mm * 150mm * 20mm; 45 ° of bevel angles, separation layer thickness＞3mm, weldingvoltage: 27-31V; welding current: 260-290A; speed of welding: 5.5mm/s, interlayer temperature: 150 ℃, protective gas Ar+CO
2Mist, flow: 20-25L/min.Welding back deposited metal performance sees Table 1.
Table 1
Annotate: be scribed ss monodrome on the impact value, be mean value down; Hardness is 14 mean values, and monodrome sees Table 2
Table 2 deposited metal hardness (Hv
10)
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| Embodiment 1 | 289 | 301 | 254 | 270 | 280 | 271 | 259 |
| Embodiment 2 | 268 | 270 | 263 | 260 | 258 | 254 | 260 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | |
| Embodiment 1 | 268 | 259 | 268 | 271 | 259 | 253 | 261 |
| Embodiment 2 | 259 | 298 | 280 | 264 | 294 | 266 | 284 |
Embodiment 3
The gas protection wire for steel of present embodiment, its deposited metal composition and content are (mass fraction %):
C： 0.04％
Mn： 1.5％
Si： 0.16％
Ni： 5.98％
Mo： 3.20％
Ti： 0.40％
Cr： 0.60％
Cu： 0.40％
Mg： 0％
S： 0.0086％
P： 0.009％
Surplus is Fe.
C capping addition when present embodiment is smelted, Mn takes off the limit addition, and Ti capping addition does not add Mg, and other manufacture processes are with embodiment 1.
Welding of present embodiment welding wire deposited metal test plate (panel) and mechanical property test are all according to GB8110-87/95---and carbon dioxide gas shiled weldering is carried out with steel welding wire standard; test plate (panel) is the Q345 steel; size 450mm * 150mm * 20mm; 45 ° of bevel angles, separation layer thickness＞3mm, weldingvoltage: 27-31V; welding current: 260-290A; speed of welding: 5.5mm/s, interlayer temperature: 150 ℃, protective gas Ar+5%CO
2Mist, flow: 20-25L/min.The tensile strength of welding back deposited metal is 930MPa, and-20 ℃ of impact flexibility mean values are 23.3J (23J, 23J, 24J), and hardness is 270 (13 mean values).
Embodiment 4
The gas protection wire for steel of present embodiment, its deposited metal composition and content are (mass fraction %):
C：0.003％
Mn： 3.0％
Si： 0.40％
Ni： 2.0％
Mo： 1.0％
Ti： 0％
Cr： 0.01％
Cu： 0.20％
Mg： 0.10％
S： 0.0085％
P： 0.009％
Surplus is Fe.
The present embodiment manufacture process is with embodiment 1.
Welding of present embodiment welding wire deposited metal test plate (panel) and mechanical property test are all according to GB8110-87/95---and carbon dioxide gas shiled weldering is carried out with steel welding wire standard; test plate (panel) is the Q345 steel; size 450mm * 150mm * 20mm; 45 ° of bevel angles, separation layer thickness＞3mm, weldingvoltage: 27-31V; welding current: 260-290A; speed of welding: 5.5mm/s, interlayer temperature: 150 ℃, protective gas Ar+5%CO
2Mist, flow: 20-25L/min.The tensile strength of welding back deposited metal is 915MPa ,-20 ℃ of notched bar impact strength 22J, and hardness is 280Hv (13 mean value).
Embodiment 5
The gas protection wire for steel of present embodiment, its deposited metal composition and content (mass fraction %), wherein the Mg mass percentage content is 0.01%, other compositions, manufacture process and the welding of deposited metal test plate (panel) and mechanical property test are with embodiment 4.The tensile strength that obtains deposited metal is 925MPa, and-20 ℃ of notched bar impact strength 34J, hardness mean value are 274Hv.Than intensity and the toughness value height of embodiment 4, hardness has reduction slightly.
Embodiment 6
The gas protection wire for steel of present embodiment, its deposited metal composition and content (mass fraction %), wherein the Mg mass percentage content is 0.004%, other compositions, manufacture process and the welding of deposited metal test plate (panel) and mechanical property test are with embodiment 3.The tensile strength that obtains deposited metal is 940MPa, and-20 ℃ of notched bar impact strength 30J, hardness mean value are 280Hv.Than intensity and the toughness value height of embodiment 3, hardness has increase slightly.
Claims (2)
1. a gas protection wire for steel is characterized in that, the mass percentage content of the overall material of each ingredients constitute is respectively:
C：0.003％-0.04％；
Mn：1.5％-3％；
Si：0.02％-0.4％；
Ni：2％-6％；
Mo：1％-3.2％；
Ti：0％-0.4％；
Cr：0.01％-0.6％；
Cu：0.2％-0.4％；
Mg：0％-0.1％；
Control of Impurities is at S :≤0.01%, and P :≤0.02%;
Surplus is Fe.
2. gas protection wire for steel as claimed in claim 1 is characterized in that, described Mg, and its mass percentage content is: 0.004%-0.01%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100417043A CN100475422C (en) | 2007-06-07 | 2007-06-07 | Gas protection solder for steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100417043A CN100475422C (en) | 2007-06-07 | 2007-06-07 | Gas protection solder for steel |
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|---|---|
| CN101058134A CN101058134A (en) | 2007-10-24 |
| CN100475422C true CN100475422C (en) | 2009-04-08 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549442B (en) * | 2008-03-31 | 2012-09-26 | 鞍钢股份有限公司 | High-toughness metal core gas protective welding wire and manufacturing method thereof |
| CN101890557B (en) * | 2009-05-22 | 2012-06-27 | 沈阳鼓风机集团股份有限公司 | Welding process of megaton ethane compressor casing |
| CN102029481A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Gas shielded welding wire with higher weather resistance |
| CN102233494B (en) * | 2010-04-27 | 2012-12-05 | 昆山京群焊材科技有限公司 | Stainless steel band electrode electroslag surfacing welding strip and welding flux |
| CN102114581B (en) * | 2011-04-06 | 2012-10-10 | 钢铁研究总院 | Gas shield welding wire for oil cargo tank of oil tanker |
| CN102500953A (en) * | 2011-12-14 | 2012-06-20 | 上海交通大学 | High-strength low-yield-ratio gas shielded welding wire |
| CN104942467B (en) * | 2015-06-19 | 2017-06-06 | 贵州航天凯宏科技有限责任公司 | A kind of welding wire for submerged-arc welding and preparation method thereof |
| 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 |
| CN115302127A (en) * | 2022-10-12 | 2022-11-08 | 中国科学院金属研究所 | Consumable electrode active gas shielded welding wire for 500 MPa-grade extremely cold ocean engineering and application thereof |
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Owner name: JIANGSU ZHONGJIANG WELDING WIRE CO., LTD. Free format text: FORMER OWNER: SHANGHAI JIAOTONG UNIVERSITY Effective date: 20121023 |
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Inventor after: Zhang Weijie Inventor before: Xue Xiaohuai Inventor before: Feng Tao Inventor before: Wu Luhai |
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Free format text: CORRECT: INVENTOR; FROM: XUE XIAOHUAI FENG TAO WU LUHAI TO: ZHANG WEIJIE Free format text: CORRECT: ADDRESS; FROM: 200240 MINHANG, SHANGHAI TO: 213000 CHANGZHOU, JIANGSU PROVINCE |
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Effective date of registration: 20121023 Address after: 213000, No. 1, Pioneer Road, Xinbei Town, Xinbei District, Jiangsu, Changzhou Patentee after: Jiangsu Zhongjiang Welding Wire Co., Ltd. Address before: 200240 Dongchuan Road, Shanghai, No. 800, No. Patentee before: Shanghai Jiao Tong University |