HVOF (High Velocity Oxygen Fuel) systems are divided into
two as gas or liquid fuelled systems. Gases such as propylene, propane,
hydrogen, natural gas are used in gas-fuelled systems. The fuel of liquid
fuelled systems is kerosene.
The HVOF spray gun is designed to spray melting thermal
powders at very high speed. The thermal powders, which are directed to the
flame formed as a result of the combustion of the fuel-oxygen mixture under
high pressure in a chamber in the gun, hit the workpiece at a speed of over
700m/sec and form the coating.
High density coatings are obtained with HVOF system. High
adhesion values obtained by high spraying speed are the most superior feature
of the system.
It is an ideal system for high hardness thermal powders such
as Tungsten Carbide and Chrome Carbide. Coatings with very superior properties
are obtained with thermal powders with various metal compositions and special
blended thermal powders with metal, carbide and ceramic.
HVOF spraying system has superior features.