水下湿法焊接是在水中直接进行的,在这种条件下,焊条、电弧和焊件不可避免的要受到周围环境的影响,从而影响到焊接冶金过程和焊接接头组织结构。水的淬火效应是湿法电弧焊最重要问题之一,这将导致焊缝金属和热影响区的脆变,进而造成上述区域金属塑性明显下降。水下焊接的平均冷却速度是空 Underwater wet welding is carried out directly in water, under these conditions, the welding rod, arc and weldment are inevitably affected by the surrounding environment, thus affecting the welding metallurgy process and weld joint structure. The quenching effect of water is one of the most important issues in wet-process arc welding, which leads to brittle changes in the weld metal and the heat-affected zone, which in turn causes a significant drop in the metal ductility of the above-mentioned areas. Underwater welding the average cooling rate is empty