By Pei Ze Technology | 21 June 2019 | 1 Comments

The difference between thermal spray technology and cold spray technology

    The thermal spraying technique is a surface treatment technique in which a certain solid material is heated to a molten or semi-molten state and sprayed on the surface of the substrate at a high speed to form a film layer having a desired property, thereby achieving the purpose of modifying the surface of the substrate. Since the thermal spray coating has a special layered structure and a number of minute pores, the combination of the coating and the substrate is generally mechanical and the bonding strength is low. In many cases, thermal spraying can cause phase changes, decomposition and volatilization of some elements, and oxidation of some elements.
    The cold spray technology is relative to the thermal spray technology. When spraying, the sprayed particles hit the surface of the substrate at a high speed (500-1000 m/s). During the whole process, the particles do not melt, maintain the solid state, and the particles undergo pure plastic deformation polymerization. coating. Cold spray technology has been rapidly developed in Russia, the United States, and Germany in recent years.

 

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