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(MAG) metal active gas welding
A motor automatically wraps a welding wire from a spool and automatically guides it to the weld. This wire is fed through the contact sleeve directly to the weld. In contrast to tungsten inert gas welding (TIG), the welding wire melts off. At the same time, protective gas is supplied through a nozzle, which protects the weld pool against the influence of oxygen and thus ensures an oxidation-free connection of the metal parts. The finished weld is also referred to as a weld bead.
MAG welding (with active gases) uses a gas mixture of argon, carbon dioxide and oxygen. The proportions of the individual gases can be adapted to the requirements of the material to be welded. Thus, by-products such as burning and spraying can be reduced. MAG welding is mainly used for unalloyed steel grades.
(MIG) Metal Inert Gas Welding
While MAG welding involves working with active gases and primarily connecting steel, MIG welding uses non-ferrous metals to weld with inert gases. Argon, in rare cases also helium (is more expensive) or their mixtures are used as inert gas. Since the gases used do not react with the base and filler metals, MIG welding is mainly used to join copper, aluminum or aluminum alloys and other non-ferrous metals.The inert gases allow welding at much higher temperatures. The possibility of an occurring oxidation of the weld is thus excluded, which in turn has a very beneficial effect. Since the inert gas is driven away due to weather influences such as wind, MIG welding can only take place in confined spaces. In the open air, the welding process would therefore be carried out without the useful oxidation protection and thus create a weld of inferior quality, which would be much more sensitive to rust and not so sustainable.This type of welding is used to manufacture containers and pipelines, in mechanical engineering, precision engineering or nuclear technology.
(TIG) Tungsten inert gas welding
When welding the workpiece, the necessary current is supplied via a tungsten electrode. This electrode does not melt, unlike MIG and MAG welding. The welds are very high quality, as the molten metal is protected by the supply of a protective gas from the influence of oxygen.
The feed takes place directly over the welding head. Since the electrode does not melt, the welding filler is fed manually. In TIG welding, the welder can adjust the amperage and the amount of filler metal to the workpiece. In TIG welding, the welding filler is fed continuously or drop by drop. The welding wire always remains in the liquid weld pool. Therefore, this is also called "stabbing method".
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