Tungsten Carbide Coating
Tungsten carbide coating can be
applied to Ariel's piston rods using a High Pressure High Velocity Oxygen
Fuel process, HVOF. The
HVOF process is a thermal spray process by which fuel, oxygen and hydrogen
are burned to produce a hot high pressure gas stream. A
tungsten carbide, cobalt and chromium powder is injected into the high
velocity gas stream and is accelerated towards the piston rod. The
high energy and hot powder forms a near pore-free density level of tungsten
carbide on the surface of the piston rod.
For the Ariel piston rods, the
HVOF process creates a final coating thickness after machining of 0.003
to 0.005 inches and a hardness level of 68-73 Rc.
Ariel
Corporation Application Manual
23 October 2003