Comparison of mig welding torch and TIG welding mig welding torch (metal inert-gas welding) English: metal inert-gas welding uses a molten electrode, and an external gas is used as the arc medium, and protects the metal droplet, the welding pool and the high temperature of the welding zone The method of arc welding of metals is called MIG. The inert gas (Ar or He) shielded arc welding method with solid wire is called MIG welding, or mig welding torch for short.

The mig welding torch connection is in addition to replacing the tungsten electrode in the welding torch with a metal wire. Others are the same as TIG welding torch. Therefore, the welding wire is melted by the arc and sent into the welding zone. The electric drive roller feeds the welding wire from the spool into the welding torch as required for welding. The heat source is also a DC arc, but the polarity is exactly the opposite of that used in TIG welding. The shielding gas used is also different. Add 1% oxygen to the argon to improve the stability of the arc. Like TIG welding torch, it can weld almost all metals, and is especially suitable for welding aluminum and aluminum alloys, copper and copper alloys, and stainless steel. During the welding process, there is almost no oxidation burn loss, only a small amount of evaporation loss, and the metallurgical process is relatively simple.

TIG welding torch (Tungsten Inert Gas Welding), also known as non-melting extremely inert gas welding. Whether it is manual welding or automatic welding of stainless steel with a thickness of 0.5 to 4.0 mm, TIG welding torch is the most commonly used welding method. The method of adding filler wire with TIG welding is commonly used in the bottom welding of pressure vessels. The reason is that the air tightness of TIG welding torch can reduce the porosity of the weld during pressure vessel welding.