For machine parts requiring high hardness in addition to corrosion and wear resistance, our gas-fueled HVOF process is the ideal solution. It produces coatings that are hard, thick, dense, and have fine, homogeneous structures.

Process description

Depending upon your requirements, propylene, propane, hydrogen, or natural gas may be used as the fuel in our High Velocity Oxygen (gas) Fuel (HVOF) thermal spray systems. As a result of the high kinetic energy transferred to the particles through both HVOF processes, the coating material generally does not need to be fully melted. Instead, the powder particles are in a molten state and flatten plastically as they impact the workpiece surface. The resulting coating has a very predictable chemistry that is homogeneous and has a fine granular structure.

Process basics

Heat source Fuel (gas) and Oxygen
Material Powder (Metal)
Flame temperature Approx. 2,800 °C
Particle velocity 400 – 800 m/s
Spray performance 40 – 150 g/min

Key characteristics

Produces coatings that are very clean, hard, and dense with fine, homogeneous structures
Coatings are tenaciously bonded to the substrate
Has low compressive stress, which results in very thick coatings

Typical applications

Landing gear
Calender rolls
Kaplan blades
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