Supersonic flame spraying technology

       

Hypersonic flame spraying (HVOF for short) is a new type of thermal spraying technology developed on the basis of ordinary flame spraying in the early 1980s. It uses hydrogen, acetylene, propylene, kerosene, etc.

 as fuel, uses oxygen as combustion accelerant, and burns in a combustion chamber or special nozzle to generate a supersonic combustion flame with a speed of 2000-3000 ° C and a speed of 2100 m/s or more, and at the same time the The powder is fed into the flame to produce molten or semi-melted particles, which are impacted at high speed and deposited on the surface of the substrate to form a coating. The coating prepared by the supersonic flame has higher bonding strength and denser than the coating prepared by ordinary flame spraying or plasma spraying. .