Where can thermal spray technology be used?

       

Thermal spraying technology refers to the use of a certain heat source, such as electric arc, plasma arc, extinguishing flame, etc., to heat powder or filamentary metal and non-metallic coating materials to a molten or semi-molten state, and then use the power of the flame itself or externally. The high-speed airflow is atomized and radiated to the surface of the pretreated matrix material at a certain speed.

A technology that separates from the base material to form a surface covering coating with various functions. During the spraying process, the molten particles hit the surface of the substrate and spread into flakes, which are cooled and solidified instantly, and the subsequent particles hit the previously formed flakes from time to time 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 flow of thermal spraying includes 3 basic processes, namely surface pretreatment, spraying and post-coating treatment. The basic process flow is shown in the figure:

 

Thermal spraying technology has the comprehensive advantages of low cost of coating preparation, high efficiency, simple and sensitive process, etc. The coating can be prepared with many functions, including wear resistance, corrosion resistance, high temperature resistance, oxidation resistance, heat insulation, electrical conductivity, insulation, reduction It has been widely used in aviation, power generation, automobile and metallurgy, and has been paid more and more attention by the industry.