脉冲电流辅助等离子弧焊Al-Mg合金晶粒细化机理

袁涛, 赵晓虎, 蒋晓青, 任学磊, 李博阳

Mechanism of Grain Refinement of Pulse Current Assisted Plasma Arc Welded Al-Mg Alloy

YUAN Tao, ZHAO Xiaohu, JIANG Xiaoqing, REN Xuelei, LI Boyang

图1 实验焊接设备及常规脉冲电流和复合脉冲电流的电流波形

Fig.1 Welding equipment (a), current waveforms of conventional pulse (b) and composite pulse (c), current acquisition waveforms of conventional pulse (d) and composite pulse (e), and sampling positions (f) (PAW—plasm arc welding)