Supersonic Flame SprayA high-temperature, high-speed flame jet formed by the combustion of hydrocarbon gases with high oxygen in a combustion chamber or a specialized nozzle, with a combustion flame velocity of 5 Mach (1,500 meters per second). Supersonic flame velocities are high, yet the temperatures are very low.

SupersonicFlame SprayingIt is a novel thermal spray technology invented by Braun of the United States in 1981. The core of the High Velocity Oxygen Fuel (HVOF) spray equipment is the spray gun, which consists of three parts: the combustion chamber (which can fully heat and accelerate the spray material particles), the Laval nozzle (which can accelerate the flame flow to supersonic speed), and the isometrically cross-sectional long nozzle (which can fully heat and accelerate the spray material particles).

For WC-Co hard alloy, the decomposition of tungsten carbide during coating application can be effectively controlled. The coating not only exhibits high bonding strength but also has excellent density and wear resistance. Its wear resistance is significantly greater thanPlasma SprayingCoating, equivalent to explosion-sprayed coating, and exceeds electroplated hard chrome and spray welding layers. Wide application.

Prior to flame spraying, it's essential to understand the actual conditions and technical requirements of the part to be coated, followed by analyzing and determining the coating thickness. Generally, machining must be done after flame spraying, so the coating thickness must account for machining allowances and consider thermal expansion and contraction during spraying. Measurement of the coating material. The selection criteria are that the coating material should meet the material, matching, technical, and working conditions of the part to be coated.

Select materials for the bonding layer and work layer to determine parameters: pressure, powder particle size, and corresponding movement speed within the component. Supersonic flame spraying with low oxygen content and suitable temperature, high flame speed, can reasonably prevent oxidation and decomposition of the powder coating, thus particularly suitable for applying high-wear-resistant carbonized coatings.