王景,崔东升,于卓立,石红信,邱然锋,朱锦洪

• 1:河南科技大学材料科学与工程学院
• 2:龙门实验室

摘要(Abstract)：

采用非对称电极对2 mm厚的AZ31B镁合金和TA2钛板进行了电阻点焊，研究了焊接电流和焊接时间对接头熔核直径和抗剪载荷的影响，分析了接头焊接区的微观组织。结果表明：随焊接电流的增大和焊接时间的延长，AZ31B/Ti接头的熔核直径增大，抗剪载荷呈先增大后稍微减小的变化趋势；当焊接时间为180 ms、焊接电流为16 kA和电极压力为3 kN时，接头的抗剪载荷最大，约为5.9 kN;在镁合金侧熔核内的靠近界面处形成了富Al的层状物，其内部形成了较多的结晶裂纹。基于非对称电极电阻点焊的AZ31B/Ti接头的形成过程是熔钎焊过程，熔核内靠近界面处的富Al层是制约接头性能的主要因素。

关键词(KeyWords)： 镁合金;钛;非对称电极;电阻点焊

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51875177);; 龙门实验室前沿探索课题(LMQYTSKT010);; 河南省科技攻关项目(242102220080,242102220090)

作者(Author): 王景,崔东升,于卓立,石红信,邱然锋,朱锦洪

DOI: 10.13289/j.issn.1009-6264.2024-0032

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