High Velocity Oxygen Fuel (HVOF) is a technology that uses a combustion device similar to a rocket engine to generate high-temperature supersonic airflow to heat and accelerate powder materials, and then form a coating on the surface of the workpiece.

Advantages: It has the characteristics of fast flame speed, high flame temperature, and fast cooling speed of sprayed particles.

The principle of supersonic flame spraying flame spraying technology is shown in the figure.

Schematic diagram of supersonic spraying (picture source: www.fst.nl)