MIG welding (inert gas metal arc welding) MIG welding with wire instead of in addition to the tungsten electrode welding torch outside. Like other and TIG welding.Thus, the wire by the arc melting, into the welding area. Power-driven roller in accordance with the required welding wire fed from the spool to the welding torch. Heat source is DCArc,Nickel Alloy Welding Wire but the polarity and TIG welding is used when the opposite is true. The protective gas used is different, argon gas was added to l% oxygen,to improve the electricalArc stability. In the basic process is also somewhat different, for example, spray transfer, pulsating spray, globular transfer and short delivery.