焊核 meaning in Chinese

nugget

Forming process analysis of equiaxed grain in weld nugget zone during friction - stir welding of aluminum alloy
铝合金搅拌摩擦焊接头焊核区等轴再结晶组织的形成机制
Resistance spot welding in aluminum alloy was tested by ultrasonic immersion method with focusing probe
摘要介绍采用水浸超声聚焦回波检测铝合金电阻点焊焊核直径。
Comparison of c - scan of entire sample and the date of local point a - scan collected and processed with the metallorgaphs of sample cross section showed that the method could be used to determine the spot size of resistance spot welding
对接头焊点的c扫描及对局部点的a扫描信号的采集与分析，经负际焊点横截面的金相观察对比，可以较准确确定点焊的焊核直径。