The HVAF Coating Mode
Working in High Velocity Air-Fuel mode, the Convertible equipment deposits coatings using continuous combustion of gaseous fuel and air, propelling metal or carbide powders towards the substrate.
The feedstock is being heated below its melting point, and it is much less oxidized or decomposed compared to coatings made with conventional Tafa-like HVOF equipment. Those features allow us to spray fine particles (5-20, 15-30 microns) accelerated to over 1,000 m/s (3,280 ft./sec.)
Smaller particles are difficult to spray with conventional HVOF equipment due to the high oxidation rate and partial evaporation in the high temperature environment.
the Convertible equipment features a lower combustion temperature even in HVOF mode. HVAF mode excludes evaporation and minimizes oxidation, leading to excellent coating properties.
HVOF Tungsten Carbide Coating Standards
Depositing certified tungsten carbide powders with Kermetico C HVOF equipment is 100% compliant with all existing HVOF standards for tungsten carbide coating applications, from aviation-specific SAE AMS 2447, 2448, 7886 to proprietary Schlumberger, Weatherford, NOV or Siemens standards.
