Supersonic flame spraying is a new type of thermal spraying technology invented in 1981 by Browning in the United States. The core of the HVOF equipment is the spray gun. The spray gun consists of a combustion chamber (to fully heat and accelerate the spray material particles), a Laval nozzle (to accelerate the flame flow to supersonic speed) and a constant cross-section nozzle (to make the spray material particles It is fully heated and accelerated) composed of three parts.

Plasma spraying is a material surface strengthening and surface modification technology, which can make the surface of the substrate have the properties of wear resistance, corrosion resistance, high temperature oxidation resistance, electrical insulation, heat insulation, radiation protection, wear reduction and sealing.

Arc spraying is a thermal spraying method commonly used in practical application engineering such as steel structure corrosion resistance, wear resistance and mechanical parts maintenance.

Explosive spraying is a method in which oxygen and acetylene gas are mixed in a certain ratio in a specially designed combustion chamber and then detonated, so that the powder is heated and melted and the particles are hit at high speed to form a coating on the surface of the part.