Electro-explosive spraying technology as a kind of thermal spraying

       Electro-explosive spraying refers to applying a pulsed high voltage to the conductive spraying material in a very short period of time (~10μs) in a certain gas medium environment, causing it to melt and partially vaporize to form plasma, which rapidly expands and explodes. Some of the liquid particles that have not been vaporized are sputtered to the surrounding at high speed (up to 600 m/s) under the impact force generated by the explosion, and the surface of the base material is rapidly cooled to form a "micro-welding" between the coating and the base material. "Coating of the transition layer.



As a kind of thermal spraying, electric explosion spraying technology has the following characteristics:

①The spraying material itself is not only a heat source, but also a source of power in the spraying process, which is also a significant difference between the electric explosion spraying technology and other thermal spraying technologies;

②It is easy to spray high melting point materials such as tungsten and molybdenum;

③ The time used in the spraying process is extremely short, and the base material will not be affected by the thermal process;

④ On the surface of the smooth substrate, a smooth and smooth coating with a relatively uniform thickness and a roughness of less than 5 μm can be sprayed;

⑤It can not only spray the plane, but also the inner surface of the cylinder; ⑥The bonding strength of the coating is high, which is several times higher than that of flame spraying and plasma spraying.