| DP590GA热镀锌双相钢电阻点焊接头性能 |
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| 引用本文： | 徐士航,王敏,施天寅,潘华,雷鸣.DP590GA热镀锌双相钢电阻点焊接头性能[J].电焊机,2009,39(10). |
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| 作者姓名： | 徐士航 王敏 施天寅 潘华 雷鸣 |
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| 作者单位： | 1. 上海市激光制造与材料改性重点实验室,上海交通大学,上海,200240
2. 宝山钢铁股份有限公司,技术中心,上海,201900 |
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| 摘 要： | 针对热镀锌双相钢板(DP590GA)电阻点焊接头问题,研究了接头正拉和拉剪强度随焊接电流的变化规律,并与普通双相钢板(DP590)点焊接头试验结果进行了比较,同时结合两种钢板点焊熔核尺寸随焊接电流的变化以及SEM能谱分析得出的熔合区锌残留量情况,分析了影响热镀锌钢板点焊接头强度的主要原因.结果表明:当其他焊接参数一定时,DP590GA与DP590点焊接头强度和熔核尺寸随着焊接电流的变化趋势在焊接电流各个阶段有所不同,而熔核区的残留锌量随焊接电流的减小而增加,从而揭示了锌层使点焊区域接触电阻降低和焊接电流密度减小引起的熔核直径减小、熔合区残留锌量增加以及锌层更易引起点焊飞溅三个因素在不同的焊接电流范围内对点焊接头强度的影响作用.
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| 关 键 词： | 热镀锌 双相钢 接头强度 熔核直径 镀锌层 |
Properties of resistance spot welding joint of DP590GA hot galvanized dual-phase steel |
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| XU Shi-hang,WANG Min,SHI Tian-yin,PAN Hua,LEI Ming.Properties of resistance spot welding joint of DP590GA hot galvanized dual-phase steel[J].Electric Welding Machine,2009,39(10). |
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| Authors: | XU Shi-hang WANG Min SHI Tian-yin PAN Hua LEI Ming |
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| Affiliation: | XU Shi-hang1,WANG Min1,SHI Tian-yin1,PAN Hua2,LEI Ming2 (1.Shanghai Key Laboratory of Materials Laser Processing , Modification,Shanghai Jiaotong University,Shanghai 200240,China,2.Baosteel Technology Center,Shanghai 201900,China) |
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| Abstract: | Aiming at resistance spot welding joint of hot galvanized dual-phase(DP590GA) steel,the rule of cross-tensile strength and tensile-shear strength of the joint changing with welding current are researched,and compared with the spot-welding test result of common dual-phase plate(DP590).Meanwhile,combining facts of spot-welding nugget diameter changing with welding current and zinc residue in fusion zone by SEM spectrum analysis,main reasons that affect the strength of spot-welding joint of hot galvanized stee... |
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| Keywords: | hot galvanizing dual-phase steel strength of joint nugget diameter zinc coating |
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