超音波振動を利用した溶接残留応力の低減法

（SS400ブロック材を対象とした肉盛り溶接での検討）

抄録

Welding is the joining method using locally given heat. Residual stress is generated near the bead and it degrades fatigue strength. A reduction method of residual stress in a short duration and low costs using ultrasonic vibration load during welding has been investigated. Build up welding was done for a block metal that is rolled steel for general structures SS400 by this method, and was measured residual stress by X-ray residual stress measurement device. In this study, effectiveness of ultrasonic vibration load for welding is investigated.