|关键词: 搭接 点焊 轻量化 钢-铝 接头性能
|The status quo of car body steel and aluminum lap connection technology
Cao Xia, Zhang Shuquan, Li Hui, Yao Junshan
|At present, mechanical connection, welding and rivet-bonded hybrid joining are the main connection modes of steel-aluminum lap for car body. But with the trend of automobile lightweight, a single connection method cannot meet the performance requirements of the steel-aluminum overlap joint. The connection technology needs to be innovated to break through the limitations of traditional methods. Steel-aluminum lap added with inter-layer (or binder) can be connected by thermally friction stir spot welding (FSSW) or laser welding using a special stirring tool. It becomes a tendency to investigate the steel-aluminum joint connection mechanism, the formation characteristics and the response characteristics of joint bearing capacity based on this welding method. The development of the steel-aluminum lap joint is reviewed and prospect of this field is previewed in this paper.
|Key words: lap connection spot welding lightweight steel-aluminum property of joint