MIG welding is also known as Gas Metal Arc Welding (GMAW). MIG welding can weld aluminum, nickel and stainless steel etc. It is mostly used in manufacturing and commercial fabrication settings. Pros of MIG welding are - high quality welding can be done fast. There is less loss to alloying elements because shielding gas protects the arc. Minimal post weld cleaning is required. Less operator skill required. Higher deposition rates than SMAW. MIG Welding can be used for various metals and alloys. Cons of MIG welding are – It cannot weld vertical position. The equipment is complex. MIG welding consists of a welding gun, a power supply, shielding gas and wire-drive system.
MIG welding problems include Burn back, Porosity, Unstable arc, difficult arc starting and irregular wire feed. Weld discontinues are undercutting, incomplete fusion, porosity, weld metal cracks, heat affected zone cracks and incomplete joint penetration.
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