There are less gas cavity and sh...Weld with trailing impactive rolling (WTIR) is a new technique to reduce the residual stress and distortion and prevent hot cracking of thin-walled structure.

• 金相和拉伸断口SEM观察表明,随焊冲击碾压焊缝区晶粒明显细化,组织更加致密,气孔、缩松等缺陷大大减少。