铝合金/低碳钢的电阻铆焊接头特性  

Performance of resistance rivet-welding joint of aluminum alloy/low carbon steel

作　　者：张瑞英 贺玉刚 石红信 张占领[1,2] 邱然锋 ZHANG Rui-ying;HE Yu-gang;SHI Hong-xin;ZHANG Zhan-ling;QIU Ran-feng(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Province and Ministry Co-built Collaborative Innovation Center of Nonferrous Metal New Materials and Advanced Processing Technology,Luoyang 471003,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471003

出　　处：《材料热处理学报》2020年第7期181-187,共7页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51875177);河南省国际合作项目(182102410066)。

摘　　要：采用自冲铆与电阻点焊的复合连接方法对铝合金与低碳钢进行了焊接。利用扫描电镜对接头微观组织进行了观察,对接头的抗剪、十字抗拉性能进行了测试。结果表明,在铆钉腿与铝合金的界面、铆钉腿外侧的铝合金与钢的界面观察到了Fe-Al系金属间化合物。接头的抗剪力与十字抗拉力随着焊接电流的增加先增大后减小,其最大值分别约为7.5 kN与4.2 kN。自冲铆与电阻点焊的复合连接方法比较适用于铝合金与低碳钢的连接。Aluminum alloy and low carbon steel were welded by self-piercing riveting and resistance spot welding. Microstructure of the joint was observed by scanning electron microscopy, and the tensile shear and cross tensile properties of the joint were tested. The results show that the Fe-Al intermetallic compounds are observed at the interface between rivet leg and aluminum alloy and the interface between aluminum alloy outside of rivet leg and steel. The tensile shear load and cross tensile load of the joint increase first and then decrease with the increase of welding current, and their maximum values are about 7.5 kN and 4.2 kN, respectively. The results reveal that the composite connection method of self-piercing riveting and resistance spot welding is more suitable for aluminum alloy and low carbon steel connection.

关 键 词：铝合金 低碳钢 自冲铆 电阻点焊 

分 类 号：TG457.1[金属学及工艺—焊接]