论文部分内容阅读
采用微电阻焊接方法对100μm厚时效态铍青铜进行搭接点焊,依据接头的抗拉剪力对微电阻点焊工艺进行了优化,并分析了焊接接头的组织形貌特征。结果表明,当焊接电流为3.0 k A、电极压力为180 N、焊接时间为30ms时,接头强度最大,抗拉剪力为107.05 N。焊接电流是影响接头性能的主要因素,焊接接头熔核区由等轴树枝晶和柱状树枝晶组成,随着电流增加,焊核中心组织变粗。
Micro-resistance welding method was used to lap-weld the 100μm thick aged beryllium bronze. The micro-resistance spot welding process was optimized according to the tensile shear resistance of the joint, and the microstructure characteristics of the welded joint were analyzed. The results show that when the welding current is 3.0 kA, the electrode pressure is 180 N and the welding time is 30ms, the joint strength is the highest, and the tensile shear resistance is 107.05 N. The welding current is the main factor that affects the joint performance. The weld nugget zone consists of equiaxed dendrites and columnar dendrites. As the current increases, the core structure becomes thicker.