Device for continuously preparing metal powder for 3D printing by gas atomization

Abstract

A device for continuously preparing metal powder for 3D printing by gas atomization comprises an atomizing injecting plate fixing top plate, an atomizing injecting plate, an electromagnetic shieldingring and a high-frequency induction coilwhich are arranged from top to bottom, wherein the atomizing injecting plate comprises a main atomizing gas flow injecting port and secondary protecting gas flow injecting ports; atomized gas flow injected by the main atomizing gas flow injecting port gathers on a wire material to form an atomizing center which is overlapped with a melting center formed at the end part of a heating wire of the high-frequency induction coil; the secondary protecting gas flow injecting ports of the injecting plate are arranged in an annular hole form; the atomizing gas flow injecting port which is a lavel ring seam communicates with an annular gas chamber; a part between each ring hole and the atomizing gas flow injecting port is an annular stopping part which is hollowed and is filled with non-Newtonian fluid; and a plurality of metal lead screws which extend to the center are fixed to the top wall and the bottom wall of an inner cavity of the annular stopping part. The device is capable of improving the stability of the particle size range of the metal powder.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, in particular to the technical field of preparing metal powder by an atomization method, in particular to a metal gas atomization device. Background technique [0002] The method and device for producing 3D printing metal powder by metal gas atomization are developing rapidly. Chinese patent (publication number CN107900366A, name: device and method for continuously preparing titanium or titanium alloy powder for 3D printing by gas atomization) discloses the following technical scheme : the device comprises from top to bottom the atomized spray plate fixed top plate, atomized spray plate, electromagnetic shielding ring and high-frequency induction coil; the atomized spray plate and the fixed top plate are fixed by fixing bolts; the atomized spray plate is fixed The central position of the top plate and the atomizing spray plate is provided with a continuous feeding hole for titanium or t...

AI Technical Summary

Problems solved by technology

However, when the method was actually tested many times for production, it was found that the actual production effect was not stable enough, and the particle size range obtained by different batches of the same metal had a large deviation, which made the particle size range of the powder actually produced

This will undoubtedly have many negative impacts on production. The most important thing is that the production process cannot be stabilized. Each time the product must be inspected many times, and the screening and other processes must be designed separately.

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