Device and method for preparing spherical titanium and titanium alloy powder

Abstract

The invention relates to a spherical titanium and titanium alloy powder preparation device and method. The device comprises a smelting chamber (12), an atomizing chamber (11), a rotating wheel (3), a smelting unit (4), a lifting device (5) and a primary powder collecting tank (7), the rotating wheel (3) is rotationally arranged in the smelting chamber (12) and located above the smelting unit (4), the smelting unit (4) moves through the lifting device (5), the smelting chamber (12) is communicated with the atomizing chamber (11), a communication port is located on the tangent line of the rotating wheel (3), and the primary powder collecting tank (7) is communicated with the atomizing chamber (11). The method comprises the following steps: a, alloy ingot smelting; b, atomizing molten drops; c, collecting powder; and d, screening the powder. And a rotating wheel is adopted to throw out the melt for heat exchange to prepare the spherical titanium or titanium alloy powder which is fine in granularity, low in hollow rate, high in sphericity degree and low in oxygen content. The problems that according to an existing spherical titanium and titanium alloy preparation method, the oxygen content, the hollow rate and the impurity content of powder are high are solved.

Description

technical field [0001] The invention relates to a device and method for preparing spherical titanium and titanium alloy powder, and belongs to the field of 3D printing metal material preparation technology and equipment development. Background technique [0002] At present, the preparation methods for 3D printing titanium powder mainly include electrode induction melting gas atomization (EIGA), plasma rotating electrode atomization (PREP), plasma spheroidization (PS) and plasma atomization (PA). )Wait. The hollow rate of 15-53μm titanium powder prepared by gas atomization method is about 0.6%, and the preparation of 1kg15-53μm titanium powder consumes 400kg of liquid argon; the rotating electrode method is limited by the rotation speed of the electrode, and the yield of -53μm powder is less than 10%. Increase the rotation speed Up to 40000rpm, the yield can reach 15%, but the equipment technical requirements are high; the powder impurity content of radio frequency plasma sp...

AI Technical Summary

Problems solved by technology

The high price of raw powder limits the application fields of printed parts

[0003] Chinese patent, Publication No. CN103406543A discloses the preparation method and device of titanium and titanium alloy powder prepared by secondary centrifugal atomization of rotating disc, but the rotating disc drops to the rotating disc, and the droplet cools down during flight, resulting in poor powder sphericity

The disadvantage is that the consumption of argon is large, the hollow powder is as high as 0.8%, and the cost of powder preparation is high

[0005] Chinese patent, Publication No. CN101716686A discloses a method for preparing fine spherical titanium powder in a short process. Hydrogenation-dehydrogenation technology and radio frequency plasma fusion spheroidization technology have the problem of high oxygen content in the powder

[0006] Chinese patent, Publication No. CN105252009A discloses the use of double femtosecond laser smelting titanium atomization to prepare titanium and titanium alloy powder. The disadvantage is that the titanium liquid will pass through the tundish and be atomized through the draft tube, which will cause pollution, and the content of impurity elements in the powder is high.

Images