lämpöruiskutuksen

Lämpöruiskutus is a thermal spray coating process. It involves heating a coating material to a molten or semi-molten state and then accelerating it towards a substrate. The heated particles impact the substrate, flatten, and rapidly solidify, forming a layered coating. This process can be used to apply a wide range of materials, including metals, alloys, ceramics, and plastics. The primary goal is to enhance the surface properties of the substrate, such as wear resistance, corrosion protection, thermal insulation, or electrical conductivity.

There are several types of thermal spray processes, each with its own advantages and applications. Flame spraying uses a combustion flame to melt and propel the coating material. Arc spraying uses an electric arc to melt two consumable electrodes, which are then atomized and propelled by a gas stream. Plasma spraying utilizes a high-temperature plasma jet to melt and accelerate the coating particles, allowing for the deposition of high-melting-point materials. High-velocity oxy-fuel (HVOF) spraying uses a combustion process to generate a high-velocity gas stream, resulting in dense and well-bonded coatings. Wire arc spraying is another method where a wire is melted by an electric arc and then sprayed onto the substrate.

The substrate surface is typically prepared by grit blasting to ensure good adhesion of the coating. After spraying, the coating can sometimes be further processed, such as by grinding or polishing, to achieve the desired surface finish and dimensional accuracy. Lämpöruiskutus is widely used in industries such as aerospace, automotive, energy, and manufacturing for applications like rebuilding worn parts, protecting components from harsh environments, and improving thermal barrier coatings.