HVOF is to push the exhaust gas that is burned under pressure through an expansion nozzle, to produce a high-velocity gas stream. The powder particles are heated by the high-velocity gas stream and then transferred by high kinetic energy to the surface of the workpiece; then a dense coating is formed with excellent bonding properties.
Advantages of HVOF:
- Workpiece remains in relatively cool conditions
- Less metallurgical-impacted sprayed materials and workpiece