Thermal Spray Powders
In the HVOF process, powder is introduced axially into a chamber in which a gas flame is constantly burning under high pressure. The exhaust gas exits through an expansion nozzle which produces a high velocity gas stream. The powder particles are heated in this gas stream and transferred by it with kinetic energy to the surface of the work piece, forming a dense coating with excellent bonding properties.
Due to the moderate transfer of heat to the powder particles and to the work piece, which remains relatively cool, there is little metallurgical change to either the sprayed material or work piece.
We use various thermal spraying techniques to protect your components against all forms of wear, such as abrasion, erosion and corrosion. Thermal-sprayed coatings are characterized by a mechanical bonding with the substrate, which provides very good bond strength. This coating technology is very useful for temperature-sensitive base materials.
Kennametal offers both standard and custom alloy and composite thermal spray powders in various size ranges. Our alloy powders are gas atomized, and we offer both sintered & crushed and agglomerated & sintered composite powders:
Please visit here for details of our HVOF & Thermal Spray powders.
Did You Know?
Kennametal offers industry standard compositions of carbide-composite thermal spray powders for use with commonly available HVOF systems.
(Note: Stelcar™ GA grades are “agglomerated and sintered” tungsten carbide powders for use with industry-standard HVOF systems)