Atomizing preparation method of TiAl powder

Abstract

The invention discloses an atomizing preparation method of TiAl powder. The method comprises the steps that vacuumizing and heating melting are conducted, and then a melt is introduced into a centrifugal nozzle; the centrifugal nozzle starts to centrifugally rotate, and argon is ejected through an inert gas nozzle simultaneously; meanwhile, a control system controls a solenoid valve at a liquid drainage port in the centrifugal nozzle to be switched on and switched off in a pulse manner, so that the melt is thrown away in a pulse manner, and a liquid flow ejected each time is rightly opposite to the ejection direction of atomized gas; frontal impact of the melt and the atomized gas is achieved, the melt is crushed into minute droplets under the action of airflow, and the minute droplets are cooled and solidified into fine powder; and the fine powder enters a collecting chamber, and then the fine powder is collected after being separated through a cyclone separator and sieved through a vibrating screen.

Description

Technical field [0001] The invention belongs to the technical field of material processing, and particularly relates to an atomized preparation method of TiAl powder. Background technique [0002] Titanium alloy has low density, high strength, high hardness, high temperature resistance, high corrosion resistance and friction resistance, especially TiAl intermetallic compound because of its high specific strength, high specific stiffness, corrosion resistance, wear resistance and high temperature resistance As well as the advantages of excellent oxidation resistance, it is becoming one of the excellent candidate structural materials in the contemporary aerospace industry, civil industry and other fields, especially in the field of aero engine blades. It has broad application prospects. 3D printing, or additive manufacturing, is a rapid prototyping process that has emerged in recent years. It adopts layer-by-layer powder spreading, laser or electron beam melting molding, to achieve...

AI Technical Summary

Problems solved by technology

Part of the more advanced technology uses the centrifugal method to atomize the melt after being thrown out. In the process of using centrifugal throwing, the inventor has found through research that the blowing speed and angle of the gas in the atomization process after the melt is thrown out, the liquid The direction of the flow has an impact on the effect of atomization and the particle size of the powder after atomization, but the current centrifugal process adopts the method of blowing air after continuous centrifugation, which makes the particle size distribution of the prepared powder uneven