The comparison results show that mechanical vibration welding can decrease the residual stress in heat affected zone, refine crystal grain, and improve the fatigue life of the weldment.

• 对机械振动焊接试板与常规埋弧自动焊接试板进行了残余应力测试、金相观察及疲劳试验,研究了机械振动焊接对焊件疲劳寿命的影响。