非熔化极惰性气体保护焊，即氩弧焊，简称TIG焊，是在氩气、氦气等惰性气体保护下，利用钨电极与工件之间产生的电弧热，熔化母材和填充焊丝，从而获得牢固焊接接头的工艺方法。氩弧焊是众多电弧焊中的一种。
Non-melting inert gas shielded welding, namely argon arc welding, TIG welding for short, uses the arc heat generated between the tungsten electrode and the workpiece under the protection of argon, helium and other inert gases to melt the base material and filler wire, thereby A process method to obtain a firm welded joint. Argon arc welding is one of many arc welding.