HVOFsprøyting

HVOFsprøyting, which stands for High Velocity Oxygen Fuel spraying, is a thermal spray coating process used to apply metallic or ceramic coatings onto a substrate. The process involves feeding powder feedstock into a combustion chamber where it is rapidly heated and accelerated by a high-velocity stream of oxygen and fuel, typically hydrogen or kerosene. This high-velocity gas stream propels the molten or semi-molten particles towards the surface to be coated. Upon impact, the particles flatten and solidify, forming a dense, well-bonded coating.

The key advantage of HVOFsprøyting lies in the high kinetic energy of the sprayed particles, which leads to coatings with very low porosity and excellent adhesion. The high velocity also results in lower oxidation of the coating material compared to some other thermal spray processes. This makes it ideal for applying wear-resistant coatings, corrosion-resistant coatings, and thermal barrier coatings. Common applications include aerospace components, industrial machinery parts, and tooling, where enhanced surface properties are critical for performance and longevity. The process can deposit a wide range of materials, including carbides, metals, and alloys.