1. Features and applications of the MIG/MAG process

Description

The semi-automatic process is an electric arc welding technique [B 7 730] . Called MIG/MAG (Metal Inert Gas/Metal Active Gas) or GMAW (Gas Metal Arc Welding) in English-speaking countries, its principle is based on the use of a fusible electrode. The electric arc generating the heat required for welding is established between the workpiece (anode) and the filler metal wire (cathode) fed by the torch. The wire unwinds continuously in the arc, and settles in a liquid state on the workpiece. MIG uses an inert shielding gas (argon, helium or a mixture of the...