4. Semi-automatic MIG and MAG welding

Main characters :

Electrode: fusible metal wire continuously unwound.

Protection: inert or weakly active gas.

Type of current: direct or pulsed.

4.1 Process description

Figure 19 shows a semi-automatic welding system, a process also known as MIG or MAG, depending on whether the gas is Metal Inert Gas or Metal Active Gas. In English-speaking countries, the terms semi-automatic welding, gas metal arc welding or GMA, gas shielded arc welding process are used interchangeably.

Semi-automatic welding is similar to submerged arc welding...

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Material processing - Assembly

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