undercut weld

基本解释

Use alternating transverse magnetic-field to control dragged arc, overcome weld undercut, and improve the appearance of weld.
所以控制电弧后拖是高速焊改善焊缝成形的关键。
In GMAW welding process, when the welding speed reaches a certain threshold, there will be onset of weld bead undercut defects.
在GMAW焊接过程中，当焊接速度达到某一临界值时会出现咬边缺陷，进一步提高焊接速度就会产生驼峰焊道。
In horizontal position welding, the gravity makes molten metal flow downward and sometimes causes weld defects such as undercut and overlap.
横向焊接时由于熔化金属重力的作用，会引起熔池金属下淌，从而产生咬边以及焊瘤等焊接缺陷。