The invention relates to a device for preparing superfine micro-spherical
titanium powder for 3D printing. The device for preparing the superfine micro-spherical
titanium powder for 3D printing comprises an automatic feeding
system, an insulation dynamic seal unit, an annular gas atomization
nozzle, an atomization chamber, an arc
cathode smelting well, a radiating cover, a protection cover, a
powder collection tank, a supersonic gas crushing mill and a
radio frequency plasma reactor. The invention further relates to a method for preparing the superfine micro-spherical
titanium powder for 3D printing. The method comprises the steps that firstly a gas atomization unit is used for performing initial powder production on raw
titanium powder; then crushing is used for further reducing the
granularity of the
titanium powder; a
plasma unit is used for further
processing the
titanium powder; the high-energy characteristic of
radio frequency plasma is used for injecting carrying gas for irregular-shaped titanium powder particles into a
plasma torch, the irregular titanium powder is heated rapidly and melted, the melted particles form drops with high
sphericity degree under the action of
surface tension, and the drops are solidified rapidly under an ultra-high
temperature gradient to form the superfine micro-spherical titanium powder good in
sphericity degree, high in purity and low in
oxygen content.