焊缝韧性改善的机理为近缝区晶粒细化和硬度降低.

焊缝韧性改善的机理为近缝区晶粒细化和硬度降低.的英文翻译

基本释义

• The mechanism of improving the toughness of the weld is the finer grain size and the lower hardness of the weld.