Ultrasonic peening technical of titanium-alloy welded joint with plasma arc welding

Aiming at the medium plate welding of the big specification vessel,the plasma arc welding technics of TA2 plate with 12 mm thickness were studied and the welding parameter effect of the joint shaping regularity was analyzed. The appropriate welding technical specifications were confirmed,the welded plate was treated by ultrasonic peening,the change of the welding residual stress was compared.The results show that the medium plate with plasma arc welding, after the welding joint was treated by ultrasonic peening,the welding residual stress can be improved.