一.概述钨极惰性气体保护焊是以某种惰性气体作为保护气的一种直接电弧熔焊方法。它是利用从焊枪喷嘴流出的某种惰性气体,在电弧及焊接熔池的周围形成惰性气体保护层流来保护钨极和焊接熔池,使其不与周围空气起作用,由于避免了空气对熔化金属的有害影响,所以可以得到优质的焊缝。图1是钨极惰性气体保护焊的示意图。 I. Overview Tungsten inert gas shielded arc welding is a kind of inert gas as a protective gas direct arc welding method. It is the use of some inert gas flowing from the torch nozzle to form a stream of inert gas protection around the arc and weld puddle to protect the tungsten and weld puddle from the ambient air as the air is avoided The harmful effects of molten metal, so you can get a good weld. Figure 1 is a schematic diagram of tungsten inert gas shielded welding.