研究了泵头体材料30CrNi3MoV钢的焊接性，采用机器人焊接代替传统的手工电弧焊对泵头体进行焊接修复。焊接时，选用弘1．2mm的JM-130焊条......

The weldability of copper-bearing aging steel is evaluated using calculated cracking susceptibility index Pcm,oblique Y-......