High frequency plasma heater for spheroidizing high temperature metal powder

Abstract

A high-frequency plasma heater for spheroidizing high-temperature metal powders, involving the field of high-frequency induction plasma technology; including induction coils, discharge confinement tubes, central gas confinement tubes, outer ring cyclones, center cyclones, powder spraying Tube sealing and fastening seat, high-pressure water-cooled powder spraying tube, Faraday cage and nozzle; the outer ring cyclone is fixedly installed on the upper surface of the Faraday cage; the center cyclone is horizontally fixed and installed on the upper surface of the outer ring cyclone; the powder spraying tube The sealing fastening seat is fixedly installed on the upper surface of the central cyclone; the central air confinement tube is fixedly installed at the axis of the Faraday cage; the discharge confinement tube extends into the Faraday cage, and one end is fixedly installed on the upper surface of the Faraday cage; high-pressure water cooling The powder injection tube extends into the discharge confinement tube; the induction coil is fixedly installed outside the discharge confinement tube; the nozzle is fixedly installed on the lower surface of the Faraday cage; the invention has a high quenching speed; the product has no agglomeration; Uniform particle size distribution and high spheroidization rate.

Description

technical field [0001] The invention relates to the technical field of high-frequency induction plasma, in particular to a high-frequency plasma heater for spheroidizing high-temperature metal powder. Background technique [0002] The 3D printing rapid prototyping technology of metal and alloy parts is one of the main development directions of near net shape technology in the future. At the same time, the development of 3D printing technology also puts forward higher requirements on the particle size and shape of the basic material powder. This technology requires powder fluidity, loose packing and high tap density, and the shape of powder prepared by traditional powder making technology is irregular. , poor fluidity, it is difficult to meet the requirements of 3D printing technology, but spherical powder with high purity, high spheroidization ratio, good fluidity, and appropriate grain size can well meet this requirement. Therefore, fine particle size, controllable high-pur...

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Problems solved by technology

[0007] The carbonyl method is to use the process of thermal dissociation of carbonyls to prepare metal powders. It is suitable for the preparation of transition metals (Fe, Co, Ni) and high melting point metals (Cr, W, Mo) powders, and the prepared powders have fine particle sizes. Uniform with high purity but prone to severe agglomeration problems

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