By peening head, impulsive force with a certain frequency was applied to the metal of the weld seam and the weld toe when they were still hot after welding.

• 通过用电磁锤锤头对焊后尚处于高温状态的焊趾和焊缝区金属施加一定频率的锤击力,迫使焊趾处的金属向焊缝中心流动,抵消致裂拉伸应变,达到防止焊接热裂纹的目的;