1 原因所谓咬边就是焊丝在焊接过程中,由于焊接速度过高,使得焊缝线能量变小,而埘焊缝两侧的加热不足,导致熔池温度下降,从而使熔池边缘的液体金属与母材润湿小良,在金属液体表面张力作用下,焊缝边缘的液体金属向中心聚集而形成的焊缝缺陷。通常情况下,焊接速度在0.5m/min 左右为佳。轻做的咬边形成驼峰焊缝,严重的咬边形成焊接 1 reason The so-called undercut is the welding wire in the welding process, due to the welding speed is too high, making the weld line energy becomes smaller, and 埘 weld on both sides of the heating is insufficient, resulting in bath temperature drop, so that the molten pool edge of the liquid metal Xiaoliang and base metal wetting, in the liquid metal surface tension, the edge of the liquid metal weld to the center of the formation of the weld defects. Under normal circumstances, the welding speed of about 0.5m / min is better. Light to do the formation of hump undercut welds, the formation of a serious undercut welds