Extend component life with HVOF and HVAF coating

The HVOF and HVAF techniques are used to enhance surface properties of components. This way, a low-cost or light-weight material can be prepared with a functional and high-performing surface. The techniques can be used to repair and restore damaged components.

The HVOF and HVAF coating techniques are used to apply coating materials such as metals and alloys to produce exceptionally hard coatings with excellent adhesion to the substrate material.

HVOF and HVAF are both thermal spray systems using combustion of gases. HVOF spraying combines velocities up to 700 m/s and higher with moderate temperatures. This process provides a very dense coating (> 97%). Deposition rates are up to 9 kg/hour, and coating thicknesses range from 0.05 to 1 mm. The HVAF process uses a fuel gas such as propane, propylene or natural gas, and compressed air.

Flash Carbide coatings

Flash Carbide is a type of thermal spray coating that uses HVAF spray technology. With an advanced spray gun design and lower application temperature, this technology allows the use of finer cuts of spray materials to create thin, dense carbide coatings with low as-sprayed surface roughness. These coatings are emerging as a promising alternative to Hard Chrome Plating (HCP) due to their sustainability, enhanced properties, and comparable process costs. The success of the coating depends on the following factors:

• The as-sprayed surface roughness is minimized to reduce the effort required for surface finishing
• The coating thickness matches the dimensional tolerances of the treated components, with minimal deviation
• The coatings are dense enough to achieve the desired corrosion resistance
• The coatings have a good combination of hardness, bond strength, and residual stress to achieve the desired mechanical properties