Metal Inert Gas Welding

Prepared by:Pratik AgrawalShubham SinghRajat SharmaSaurabh SanghviRohit Sawalia

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 and Carbon

Dioxide:• MIG welding can be used to weld

aluminum, steel and various other metals.

• CO2 is generally used for steels.

Welding Circuit

Welder

Wire Spool

Welding Gun

Shielding Gas

Wire Feeder

Work CableWork Piece

MIG Welding Setup

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.

Difference between CO2 and Argon gas welding

Advantages

• Welds most metals• Little or no slag• Easiest to learn• Greater speed and efficiency• Fewer Weld Defects• Welds in most positions• Higher welding speeds• The process can also be automated easily

Disadvantages

-Not ideal for thick material or deep penetrating welds.

-Higher initial setup cost.

-Atmosphere surrounding the welding process has to be stable (hence the shielding gasses), therefore this process is limited to draught free conditions.

-Higher maintenance costs due to extra electronic components.

-The setting of plant variables requires a high skill level.

-Radiation effects are more severe.

Thank You