深冷处理对CuCoBeZr电极合金化的影响

Effect of Cryogenic Treatment on Alloying of CuCoBeZr Electrode

对深冷与未深冷处理的CuCoBeZr电极在镀铝锌板点焊600点后进行微观形貌观察和对比分析,并探讨了深冷处理时间对CuCoBeZr电极合金化的影响。结果表明:经-196℃深冷后的CuCoBeZr电极在点焊600点后,端面有大量的Cu存在,依旧可以保证较为良好的导电、导热作用。深冷效果对比发现,CuCoBeZr电极保温6 h后没有明显的合金层,并且在距端面不到20μm处合金化现象消失,电极端部孔洞、裂纹较少,是最佳保温时间。

The micromorphology of CuCoBeZr electrode after 600 spot welding of aluminum zinc plated plate was observed and compared with that of CuCoBeZr electrode without cryogenic treatment,and the effect of cryogenic treatment time on the alloying of CuCoBeZr electrode was discussed.The results show that the CuCoBeZr electrode after cryogenic treatment at-196 ℃ has a large amount of Cu on its end face after spot welding 600 points,which can still ensure good conductivity and heat conduction.The comparison of cryogenic effect shows that there is no obvious alloy layer after the CuCoBeZr electrode insulated for 6 h,and the alloying phenomenon disappears at less than 20 μm away from the end surface,and there are fewer holes and cracks at the electrode end,which is the best holding time.