Värmeinblåsning

Värmeinblåsning, often translated as thermal spraying, is a group of industrial coating processes in which molten or semi-molten materials are sprayed onto a surface. The raw material, typically in powder, wire, or rod form, is heated by a fuel gas, electric arc, or plasma. This molten or softened material is then propelled by a high-velocity gas stream towards the substrate. Upon impact, the particles flatten, rapidly cool, and adhere to the surface, forming a cohesive coating.

The primary purpose of värmeinblåsning is to improve the surface properties of a component. This can include enhancing wear resistance, corrosion protection, thermal insulation, electrical conductivity, or restoring worn dimensions. Different types of värmeinblåsning exist, each with its own advantages and applications. Common methods include flame spraying, arc spraying, plasma spraying, and high-velocity oxygen fuel (HVOF) spraying. The choice of method and coating material depends on the specific requirements of the application.

Värmeinblåsning finds widespread use in various industries such as aerospace, automotive, power generation, and manufacturing. For example, it is used to coat turbine blades for high-temperature resistance, engine components for wear protection, and medical implants for biocompatibility. The process allows for the application of a wide range of materials, including metals, alloys, ceramics, and even some plastics, onto diverse substrates. Careful control of process parameters is crucial to achieve desired coating characteristics and adhesion.