Plasma Spheroidization Spray Equipment and Its Technology for Producing Dense Spherical Powder

Characteristics of Plasma Spraying (1) It can spray a wide variety of coating materials, especially those with high melting points and refractory materials such as refractory metals, ceramics, metal-ceramics, and other special functional materials. (2) Inert gases can be selected as the working medium, reducing oxidative reactions of sprayed particles during their flight. (3) The coatings exhibit high bonding strength and low porosity; fine coatings can be prepared by precisely controlling process parameters.

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Coating spray equipment

Plasma spraying equipment

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Product Description

Plasma Spheroidization Spray Equipment and Its Technology for Producing Dense Spherical Powder

Introduction to Plasma Spraying Technology

Plasma spraying is a thermal spraying process that uses a plasma arc as the heat source and primarily employs spray powder materials.

① Steps of plasma spraying

During plasma spraying, a direct-current arc is generated between the cathode and the anode (nozzle). This arc heats and ionizes the introduced working gas into a high-temperature plasma, which is then ejected from the nozzle to form a plasma jet. Powder particles are fed into the plasma jet by a powder-feeding gas, where they are melted, accelerated, and sprayed onto the substrate material to form a coating. The working gas can be argon, nitrogen, or a mixture of these gases with hydrogen added; alternatively, a mixed gas of argon and helium can also be used.

② Characteristics of plasma spraying

(1) Capable of spraying a variety of coating materials, especially high-melting-point and refractory materials such as refractory metals, ceramics, metal-ceramics, and other special functional materials;

(2) Inert gases can be selected as the working medium to reduce oxidative reactions of spray particles during their flight.

(3) The coating exhibits high bonding strength and low porosity; fine coatings can be prepared by controlling process parameters.

③ Main equipment for plasma spraying

Including the spray gun, powder feeding mechanism, rectifier current, air supply system, water cooling system, and control system.

Introduction to the Configuration of the SX-80 Plasma Spraying Equipment

The SX-80 plasma coating equipment was developed successfully based on the introduction and absorption of plasma spraying equipment such as the PT-A3000 and METCO-9M. Its overall performance level is comparable to that of the METCO-9M.

This equipment consists of the following systems: ① main power supply ② control cabinet ③ junction box ④ powder feeder ⑤ gas-electric safety center ⑥ spray gun ⑦ heat exchanger and piping connections, among others.