Thermal spraying technology refers to the application of a certain heat source, such as an electric arc or plasma arc, to heat powdered metal and non-metallic coatings to a molten or semi-melted state, and then to atomize with the power of the flame stream or an external high-speed air flow and A certain speed is radiated to the surface of the pre-treated substrate.
It is a technology that separates from the substrate to form a cover mask with various functions. During the spraying process, the molten particles hit the outer surface of the substrate and spread into flakes, and immediately cool and solidify. The subsequent particles from time to time hit the previously formed flakes and accumulate to form a coating.
Thermal spraying technology can be divided into atmospheric plasma spraying, supersonic plasma spraying, arc spraying, high-speed arc spraying, flame spraying, supersonic flame spraying, explosive spraying, cold spraying, etc. according to different heat sources. The general process of thermal spraying includes three basic processes, namely pre-treatment of the surface, spraying and post-coating treatment.
Thermal spraying technology has the comprehensive advantages of low cost of coating preparation, high efficiency, simple and sensitive process, and many coatings can be prepared, including wear resistance, corrosion resistance, high temperature resistance, oxidation resistance, thermal insulation, electrical conductivity, insulation, reduction Motorcycle, smooth, anti-radiation, etc., have obtained important applications in the fields of aviation, power generation, automotive and metallurgy, and have increasingly attracted the attention and attention of the industry.
