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       The basic techniques of tungsten carbide spraying include substrate surface pretreatment, spraying, surface heat treatment, coating sealing treatment and coating surface treatment.



(1) Substrate surface pretreatment: After selecting the spraying method, select the pretreatment process of degreasing, rust removal and surface roughness.



(2) Spraying: When spraying tungsten carbide, the metal spraying manufacturer should determine reasonable process parameters to control the spraying quality.



Including: injection heat source conditions, that is, the mixing ratio of fuel and oxygen;

(3) Material conveying, that is, the type, speed, flow rate, conveying position and angle of the gas;



(4) Tungsten carbide spray material, including material composition, physical properties, powder form, particle size, wire or rod diameter, etc.



Four basic components, substrate temperature, properties and surface treatment methods;





There are five tungsten carbide spraying operations, including the distance between the gun and the machine, the speed of the gun or machine part, the angle between the gun and the machine part, and the spraying of gaseous media.



Coating: Sealing treatment or heat treatment should be carried out immediately after.



Surface treatment: After tungsten carbide spraying, the sprayed tungsten carbide coating should be polished to ensure dimensional accuracy. In addition, safety protection should be carried out when spraying.



High-speed and high-temperature spray protection for workers and tungsten carbide spray equipment, including ventilation of dust and spray dust, and safety protection from spray noise and arc radiation.

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