1. The plasma arc
Plasma arc welding using plasma arc welding method as a heat source. Gas produced by the arc heating dissociation, is compressed by water nozzles at high speed, and increase the energy density of the solution off, forming a plasma arc. Its stability, and heat temperatures higher than the general arc, which has a large penetration force, and welding speed. Shielding gas plasma arc formation and its surrounding gas is typically argon. The various material properties of the workpiece, but also a mixed gas of helium or argon, helium, argon, hydrogen and the like.