Process and equipment used for preparing high-purity spherical titanium and titanium alloy powder material

Abstract

The invention discloses a process and equipment used for preparing a high-purity spherical titanium and titanium alloy powder material. The equipment comprises an electrode vertical conveying device 1, a vacuum induction melting device 2, a gas atomizer 3 and an atomizing tower 4, and is characterized in that the vertical displacement and the rotating speed of titanium and titanium alloy electrode bars entering a vacuum induction melting furnace are precisely controlled by the electrode vertical conveying device; the titanium and the titanium alloy electrode bars are molten into liquid in the induction furnace under a non-crucible contact state; the melting rate of the titanium and titanium alloy electrode bars can be adjusted through controlling the displacement speed of the titanium and titanium alloy electrode bars entering the melting furnace and the heating temperature in the induction furnace; when the metal liquid passes through a gas confluence focus of the high-pressure inert gas atomizer, a titanium and titanium alloy liquid phase flow is crushed into a superfine fogdrop state; under the effect of surface tension, liquid drops settle, cool and form the spherical superfine powder material in the atomizing tower and are separated and collected by a filter; the titanium and titanium alloy powder materials with different granularities and size distribution can be obtained through controlling atomizing gas pressure and flow. By using the process and the equipment, high-purity spherical magnesium, aluminum, nickel, chromium, tungsten, molybdenum and corresponding alloy powder and ceramic powder can be prepared.

Description

technical field

[0001] The invention relates to a technology and equipment for producing high-purity spherical titanium and titanium alloy powder materials by using rotating electrode vacuum induction smelting and inert gas atomization. Background technique

[0002] Titanium metal is extremely active in the high-temperature melting process. When the traditional inert gas high-pressure atomization method is used to produce spherical titanium and alloy powder materials, due to the use of oxide and nitride material crucibles for melting, titanium elements will interact with these crucibles at high temperatures. Oxidation-reduction reactions occur in the material, so high-purity, high-quality titanium and alloy powder materials cannot be produced, which seriously affects the use of titanium and titanium alloys as advanced materials in powder metallurgy injection molding (MIM) and 3D metal printing additive molding. Meet the special requirements of aerospace, medical equipment, c...

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