MIG, MAG, TIG method
In the MIG and MAG methods, an electric arc is used. The arc is generated between the consumable electrode (wire) and the work piece. This process also involves a shielding gas that shields the wire and the arc. In the case of MIG, the shielding gas is chemically inert (e.g. helium or argon), while in MAG a chemically active gas (e.g. carbon dioxide) is used. Both methods are used in joining elements made of low-carbon steel, stainless steel, acid-resistant steel, aluminum and alloy steel.
The TIG method also uses an electric arc. It is produced by a non-fusible tungsten electrode in a sheath of chemically inert protective gas, usually argon or helium, flowing from the nozzle of the electrode holder. The main advantages of this method include the ability to weld almost all metals and alloys, in all positions, the possibility of welding thin sheets – from about 0.5 mm, and high quality and neatness of the weld. In addition, the TIG welding process does not produce slag, which eliminates the risk of contamination of the weld with inclusions, and the finished weld requires practically no cleaning. The most common application for TIG welding is the welding of stainless steels and other high-alloy steels, as well as materials such as aluminum, copper, titanium, nickel and their alloys.