The Best High-Velocity Air Fuel (HVAF) Coating For Your Job

Technical Information

HVAF uses air as an oxygen source to cause combustion that propels the coating powder particles onto the surface. The combustion temperature is typically 1000 degrees Celsius lower than in oxygen-fuel combustion. The lower temperature burn of HVAF heats the sprayed powder particles less, thus controlling the thermal alteration of the coating.

This lower temperature is ideal for the gradual heating of the feedstock particles of metals and cemented carbides to -- or slightly above -- the metal’s melting temperature. The initial oxygen content in the combustion gas mixture is 5-fold lower in comparison to the HVOF process. This allows for the retention of the original ductility of the powder feedstock material in the applied coating, even when the hardness of the cemented carbide coating exceeds 1600 HV300.