摘要
采用电阻点焊实现了ABS塑料与Q235钢异种材料的搭接连接,分析了工艺参数改变对接头成形与力学性能的影响及接头失效后的断口形貌。结果表明,随着焊接电流和焊接时间的增加,接头焊合面积逐渐增大,接头拉伸载荷也随之增大;电极压力改变时,接头拉伸载荷并未出现较大的变化趋势。热输入过大时接头成形质量变差,在搭接界面塑料被大量挤出;在接头界面塑料金属相互嵌合包覆形成了机械互锁结构。接头失效有界面撕裂和塑料母材拉断两种形式。
The lap joining of dissimilar materials of ABS polymer and Q235 steel was achieved by using resistance spot welding, and the effect of the change of process parameters on the forming and mechanical properties of the joint and the fracture morphologies of the joint after failure were analyzed. The results show that with the increase of welding current and welding time, the welding area of the joint gradually increases and the tensile load of the joint increases. When the electrode pressure changes, the tensile load of the joint does not change dramatically. When the heat input is too large, the forming quality of the joint is poor, and the plastic is squeezed out in large quantities at the lap interface. The mechanical interlocking structure is formed at the interface by mutual insertion of the polymer and metal. There are two modes of joint failure, which are interfacial tearing and plastic matrix breaking.
作者
张昌青
靳少龙
杨黎东
刘雄波
ZHAGN Changqing;JIN Shaolong;YANG Lidong;LIU Xiongbo(State Key Laboratory of Advanced Processing and Recycling Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Chin)
出处
《热加工工艺》
CSCD
北大核心
2018年第7期30-33,共4页
Hot Working Technology
基金
甘肃省自然基金资助项目(1508RJZA055)
关键词
ABS塑料
电阻点焊
热输入
接头成形
断裂
ABS plastic
resistance spot welding
heat input
joint forming
fracture
