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Device and method for preparing superfine micro-spherical titanium powder for 3D printing

A spherical titanium powder, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of difficulty in controlling the shape of titanium or titanium alloy powder, high cost of electrochemical and reduction methods, and inability to control the shape of powder particles. The effect of fast processing speed, moderate equipment cost and few defects

Inactive Publication Date: 2015-11-18
SHANXI ZHUOFENG TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the morphology of titanium or titanium alloy powder produced by existing preparation methods is difficult to control, and the particle size is relatively coarse and the distribution range is wide.
Among them, the electrochemical and reduction methods are costly, and the solvents and reducing agents used are highly toxic, and are easy to introduce impurities such as halogens and sulfur; the ball milling method can only be used for brittle materials, usually with high oxygen content and cannot control the powder Particle Morphology

Method used

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  • Device and method for preparing superfine micro-spherical titanium powder for 3D printing
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  • Device and method for preparing superfine micro-spherical titanium powder for 3D printing

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Effect test

Embodiment 1

[0046] First select the titanium rod with a specification of φ50mm×500mm, send the titanium rod to the inside of the arc cathode smelting well through the automatic feeding system, and then evacuate the whole device to a vacuum degree of 1×10 -5 Pa, then fill the whole device with the inert gas argon; then use the high-purity titanium block as the anode, and use the smelting well as the cathode, in the environment of the inert gas argon, a high-intensity arc is formed by discharge, and the arc starting current is 1000A, the arc voltage is 50V; under the action of high-intensity arc, the titanium rod undergoes primary melting to form a continuous metal flow or droplet; the obtained metal flow or droplet falls freely under the action of gravity, leaving the high-intensity After the arc heating zone, it is crushed into fine metal droplets by the inert airflow generated by the annular gas atomization nozzle. The pressure of the atomizing gas is 5MPa, and the flow rate of the atomiz...

Embodiment 2

[0049] First select the titanium rod with a specification of φ50mm×500mm, send the titanium rod to the inside of the arc cathode smelting well through the automatic feeding system, and then evacuate the whole device to a vacuum degree of 1×10 -5 Pa, then fill the whole device with the inert gas argon; then use the high-purity titanium block as the anode, and use the smelting well as the cathode, in the environment of the inert gas argon, a high-intensity arc is formed by discharge, and the arc starting current is 1000A, the arc voltage is 50V; under the action of high-intensity arc, the titanium rod undergoes primary melting to form a continuous metal flow or droplet; the obtained metal flow or droplet falls freely under the action of gravity, leaving the high-intensity After the arc heating zone, it is crushed into fine metal droplets by the inert airflow generated by the annular gas atomization nozzle. The pressure of the atomizing gas is 10MPa, and the flow rate of the atomi...

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Abstract

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.

Description

technical field [0001] The invention relates to a device and a method for preparing ultrafine spherical titanium powder for 3D printing, belonging to the technical field of metal powder preparation. Background technique [0002] 3D printing technology is especially suitable for the development of high value-added complex structural products, personalized customization and verification of design and R&D before mass production. Compared with the current international advanced level, my country still has a big gap in the research and development of forming materials required for 3D printing. At present, the material design and preparation process mainly follow the foreign progress. In terms of forming material products for 3D printing, the fine-grained spherical titanium and titanium alloy powder needed in China are almost completely dependent on imports. The lack of high-quality forming materials for 3D printing is one of the bottleneck factors restricting the promotion and a...

Claims

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Application Information

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IPC IPC(8): B22F9/08B33Y70/00
Inventor 程一民程一军张永杰王全喜郑云萍孙虎林韩凌江孟群喜张承华
Owner SHANXI ZHUOFENG TITANIUM IND
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