It is found, current channel resistance has greater effect on the penetration of A-TIG welding for aluminium alloys. Especially in A-TIG welding with DCSP, the change of heat input due to the change of current channel resistance is the main effect.

• 研究发现，导电通道电阻对铝合金A-TIG焊熔深有较大影响，尤其在直流正接A-TIG焊中，由于导电通道电阻变化而导致的热输入的变化成为影响熔深的重要因素。