Metal Inert Gas Welding

Metal Inert Gas Welding

• Metal Inert Gas (MIG) or Gas Metal Arc Welding (GMAW) is the most popular of the arc welding processes.– It is mainly because it is easy to use and

versatile. – With an Inert Gas, such as Argon:

• MIG welding can be used to weld aluminum.

Welding Circuit

Welder

Wire Spool

Welding Gun

Shielding Gas

Wire Feeder

Work CableWork Piece

Welding Power Source

Work Clamp

Welding Gun

Wire Spool

Shielding Gas

Wire FeederRegulator

How It Works

An arc is struck between a continuously fed filler wire and the work.

The arc is protected from oxidation by a shielding gas over the weld pool.

Advantages

• Welds most metals

• Little or no slag

• Easiest to learn

• Greater speed and efficiency

• Fewer Weld Defects

• Welds in most positions

Disadvantages

• Welding outside can be difficult

• Not ideal for thick material or deep penetrating welds