Weld spatter consists of particles of metal unintentionally ejected from the molten pool during welding and deposited on the surface of base or weldmetal.
焊接溅落包括无意地从熔融池中溅出的金属颗粒并落到了母体金属或焊缝金属的表面。
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In horizontal position welding, the gravity makes moltenmetal flow downward and sometimes causes weld defects such as undercut and overlap.