MIG (Metal Inert Gas)
In MIG welding process, the electric arc is established between a continuously fed wire and the base metal. The cast area is protected by an inert gas or a mixture of gases (Air, Co2, He or O2).
TIG (Tungsten Inert Gas)
The TIG welding process is determined by the electric arc established between a non-consumable electrode of tungsten-base material and the part to be welded. The weld puddle is protected by an inert gas flow (Ar).
Submerged-arc
In this process a solid or tubular wire is continuously fed establishing and electric arc with the part. A granular flow involves the electric arc, protecting the metal to be cast and the weld puddle against atmospheric contamination.
As the electric arc is completely hidden and out of sight, welding is performed without luminosity, sparks and splashes.
