汽车用镀锌钢板电阻点焊可焊性的研究  

A Study on the Weldability of Automotive Galvanized Steel Sheet in Resistance Spot Welding

作　　者：林浩磊[1] 沈洁[1] 张延松[1] 陈关龙[1] 

机构地区：[1]上海交通大学,上海市数字化车身重点实验室,上海200240

出　　处：《汽车工程》2011年第6期549-552,共4页Automotive Engineering

基　　金：国家自然科学基金(50905111)资助

摘　　要：采用剥离试验、扫描电子显微镜和能谱仪等方法对比分析了不同镀层钢板对电阻点焊可焊性工艺窗口和电极磨损的影响规律。结果表明,与纯锌镀层钢板相比,锌铁合金镀层钢板的点焊工艺窗口要宽33%左右;连续点焊电极寿命约长4 000点,原因在于纯锌镀层更容易与电极帽中的铜发生合金化反应。The effects of different coatings on the weldability and electrode wear of automotive galvanized steel sheet in resistance spot welding are comparatively analyzed by peeling test,scanning electron microscopy and energy dispersive spectrometry.The results show that compared with pure Zn coated steel,the welding process window of Fe-Zn coated steel is 33% wider and the lifespan of its electrode is much longer（some 4,000 spots more）.The reason of the latter is that alloy reaction with copper in electrode tip is easier to happen for pure-Zn coating.

关 键 词：镀锌钢板 电阻点焊 可焊性 电极磨损 

分 类 号：U465[一般工业技术—材料科学与工程] TG453.9[机械工程—车辆工程]