Device and method for continuously preparing titanium or titanium alloy powder for 3D printing through gas atomization

Abstract

The invention relates to a device and a method for continuously preparing a titanium or titanium alloy powder for 3D printing through gas atomization. The device comprises an atomization spray disc fixing top plate, an atomization spray disc, an electromagnetic shielding ring and a high-frequency induction coil from top to bottom, wherein the atomization spray disc and the fixing top plate are fixed through a fixing bolt; continuous conveying feeding holes for a titanium or titanium alloy wire material are formed in the central positions of the atomization spray disc fixing top plate and the atomization spray disc; the atomization spray disc and the electromagnetic shielding ring are coaxially installed about the axes of the conveying feeding holes; the atomization spray disc comprises a main atomization gas flow nozzle and auxiliary protection gas flow nozzles; and atomization gas flow sprayed out via the main atomization gas flow nozzle is collected on the wire material to form an atomization centre, and the atomization centre is superposed with a melting centre formed due to the heating of the high-frequency induction coil for the end part of the wire material. Therefore, melting flow is immediately limited and atomized by the main atomization gas flow after being generated, so that a superheating degree is furthest ensured, heat loss is reduced, and a high fine powder yieldof titanium or titanium alloy atomization is realized.

Description

Technical field

[0001] The invention belongs to the technical field of powder metallurgy, and particularly relates to the technical field of preparing titanium or titanium alloy powder by an atomization method. Background technique

[0002] Titanium or titanium alloy has a series of advantages such as low density, high specific strength, high yield-to-strength ratio, excellent plastic toughness and corrosion resistance, and non-magnetic properties. It is widely used in aviation, aerospace and other military sectors as well as chemical industry, metallurgy, and light industry. , medical and other fields. However, due to the poor thermal conductivity, low plasticity, high hardness and low specific heat of titanium alloys, its forming is difficult, which limits the application of titanium alloys in some fields. The emergence of 3D printing technology has changed the processing of metal materials from subtractive manufacturing to 3D printing, and from traditional casting, rolli...

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