Plasma spraying utilizes compressed arc technology for spraying

       

Plasma spraying Plasma spraying is a technology of material surface strengthening and surface modification, which can make the substrate surface have the properties of wear resistance, corrosion resistance, high temperature oxidation resistance, electrical insulation, heat insulation, radiation protection, wear reduction and sealing. Plasma coating technology is a method of using a plasma arc driven by direct current as a heat source to heat ceramics, alloys, metals and other materials to a molten or semi-molten state, and spray it to the surface of the pretreated workpiece at a high speed to form a method that adheres firmly to the surface layer. .

Isoparticle spraying is carried out by using plasma arc. The ion arc is a compression arc. Compared with the free arc, its arc column is thin, the current density is high, and the gas ionization degree is high, so it has the characteristics of high temperature, concentrated energy and good arc stability. . Plasma spraying technology is a new multi-purpose precision spraying method developed after flame spraying. It has:

①Ultra-high temperature characteristics, convenient for spraying of high melting point materials.

②The speed of sprayed particles is high, the coating is dense, and the bonding strength is high.

③ Since the inert gas is used as the working gas, the sprayed material is not easy to be oxidized.