| 汽车钢板点焊工艺的发展 |
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| 引用本文： | 黄治军,刘吉斌,王靓. 汽车钢板点焊工艺的发展[J]. 钢铁研究, 2012, 40(5): 60-62 |
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| 作者姓名： | 黄治军 刘吉斌 王靓 |
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| 作者单位： | 武汉钢铁（集团）公司研究院,湖北武汉,430080 |
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| 摘 要： | 通过文献调研分析了冷轧、镀锌及高强汽车板的焊接特点。采用普通点焊工艺,铁锌合金镀锌板比纯镀锌板点焊工艺窗口宽约30%,但预热后纯镀锌板焊接性能较好;FEA模拟Mn-Si系TRIP800钢的焊点十字拉伸强度明显高于Mn系DP450钢,但实际试验结果却明显较低;Mn系1.5mm规格的DP800钢在点焊电流11 000A及时间0.6s时,焊点拉剪试验以韧性特征为主,焊点拉剪力高于20kN。1 300MPa热成型钢点焊接头有一定软化倾向。不同种类高强钢的合金元素含量和生产工艺的不同,其焊接性能体现出较大差异。
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| 关 键 词： | 电阻点焊 镀层板 TRIP800 DP800 十字拉伸 |
Development of spot resistance welding technology of automobile steel sheets |
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| HUANG Zhi-jun,LIU Ji-bin,WANG Liang. Development of spot resistance welding technology of automobile steel sheets[J]. Research on Iron and Steel, 2012, 40(5): 60-62 |
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| Authors: | HUANG Zhi-jun LIU Ji-bin WANG Liang |
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| Affiliation: | (Research and Development Center of WISCO,Wuhan 430080,China) |
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| Abstract: | On the basis of a systematic review to recent literatures,electric resistant welding technology for cold rolling steel sheets,galvanized steel sheets and high strength steel sheets is analyzed in this paper.With ordinary welding technology,Zn-Fe-coated sheets has a 30 % wider welding lobe than that of Zn-coated sheet,but after preheated,Zn-coated sheet has better weldability;FEA simulated cross tensile strength for Mn-Si TRIP800 is higher than that of Mn DP450,but the actual experimental results are obviously lower.For 1.5 mm thick Mn TRIP800 sheet,when welding current is 11 000 A and welding time 0.6 s,the shear tensile test of spot welding is of tough characteristics,and the tensile force is above 20 kN.Spot welding of 1 300 MPa hot stamping sheet has softening tendency.Different high strength steel sheets with different alloying content and different production technology have different weldability. |
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| Keywords: | electric resistant welding coated steel sheets TRIP800 DP800 cross tensile test |
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