Plasma welding parts refers to a fusion welding method that uses a plasma arc high energy    density beam as a welding heat source. Plasma welding partshas the characteristics of energy concentration, high productivity, fast welding speed, small stress deformation, stable electric isolation and suitable for welding thin plates and boxes. It is especially suitable for various refractory, oxidizable and heat sensitive metal materials.

The gas is dissociated by arc heating and is compressed as it passes through the water-cooled nozzle at high speed, increasing the energy density and dissociaion to form a plasma arc. Its stability, heat generation and temperature are higher than the general arc, so it has a large penetration and welding speed. The gas forming the plasma arc and the shielding gas therearound are generally pure argon. Depending on the material properties of the various work pieces, it is also possible to use helium, nitrogen, argon or a mixture of both.