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Preparation method of near-spherical titanium powder

A titanium powder and near-spherical technology, which is applied in the field of preparation of near-spherical titanium powder, can solve the problems of complex process, low yield, and high cost of spherical titanium powder, and achieve low equipment requirements, low oxygen content, and cost reduction Effect

Inactive Publication Date: 2019-12-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the cost of preparing spherical titanium powder in the prior art is high, the process is complicated, and the yield is low

Method used

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  • Preparation method of near-spherical titanium powder

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preparation example Construction

[0023] Concrete, the preparation method of near-spherical titanium powder, it comprises the following steps:

[0024] A. Mix titanium dioxide and additives evenly, and press them into prefabricated materials;

[0025] B. In a closed reaction vessel, place the metal reducing agent in the lower part of the reactor, and place the prefabricated material in the upper part of the reactor, and use a partition to separate the middle, and carry out the reduction reaction under the protection of an inert gas to obtain the raw material;

[0026] C. Crushing the reducing material under the protection of an inert gas, then carrying out acid leaching, then washing and drying to obtain titanium metal powder with irregular shapes;

[0027] D. Reshape the irregularly shaped metal titanium powder in a jet mill to obtain nearly spherical titanium powder.

[0028] In the present invention, using CaCl 2 , MgCl 2 Chloride is used as an additive, and the additive volatilizes during the heating pr...

Embodiment 1

[0036] Using titanium dioxide on the market as raw material, TiO 2 is 99.2%, firstly mix 1000g of titanium dioxide with additive CaCl 2 According to the mass ratio of 2:1, the briquetting is evenly mixed, and the block making pressure is 1MPa to make a Φ30×7mm cylindrical prefabricated block; 2000g of metal Ca is placed in the lower part of the reactor, and the prefabricated block is placed in the upper part of the reactor. The separator is separated, and then the reactor is welded and sealed; the reactor is heated to 1000°C in the muffle furnace, protected by argon during heating, and the holding time is 6 hours. After the reaction is completed, the reactor is taken out;

[0037] Crush the product until the particle size is less than 80 μm and greater than 98%, leaching with 4% dilute hydrochloric acid, the liquid-solid ratio of the leaching is 30mL: 1g, the temperature is 25°C, and the time is 15min. Dry at 60°C for 12 hours to obtain titanium metal powder with irregular sh...

Embodiment 2

[0040] Using titanium dioxide on the market as raw material, TiO 2 is 99.2%, firstly mix 1000g of titanium dioxide with additive CaCl 2 According to the mass ratio of 2:1, the briquetting is evenly mixed, and the briquetting pressure is 1 MPa to make a Φ30×7mm cylindrical prefabricated block;

[0041] Put 1000g of active metals Ca and Mg in the lower part of the reactor, place the prefabricated blocks in the upper part of the reactor, and separate them with a partition with holes in the middle, then weld and seal the reactor; heat the reactor to 950°C in a muffle furnace , argon protection during heating, the holding time is 6h, and the reactor is taken out after the reaction;

[0042] Crush the product until the particle size is less than 80 μm and greater than 98%, leaching with 5% dilute hydrochloric acid, the leaching liquid-solid ratio is 25mL: 1g, the temperature is 25°C, and the time is 10min. Dry at 60°C for 12 hours to obtain titanium metal powder with irregular sha...

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Abstract

The invention discloses a preparation method of near-spherical titanium powder, and belongs to the technical field of 3D printing material preparation. In order to solve the technical problems of highcost, complex process and low yield in preparation of spherical titanium powder in the prior art, the invention provides a preparation method of near-spherical titanium powder, which comprises the following steps: uniformly mixing titanium dioxide with an additive, and pressing into a prefabricated material; carrying out reduction reaction in a closed reaction container to obtain a reduction material; crushing, acid leaching, washing and drying the reducing material to obtain metal titanium powder with irregular shapes; and finally, carrying out the shaping treatment in a jet mill to obtain the nearly spherical titanium powder. Compared with the traditional preparation process of the spherical titanium powder, the method has the advantages of low equipment requirement, greatly reduced cost, nearly spherical titanium powder, low oxygen content and the like.

Description

technical field [0001] The invention belongs to the technical field of 3D printing material preparation, and in particular relates to a preparation method of near-spherical titanium powder. Background technique [0002] Titanium is an indispensable key material for the development of the national economy. Due to its advantages such as low density, corrosion resistance, high specific strength, and excellent biocompatibility, it is widely used in aerospace, petrochemical, energy power, biomedical and other fields. However, due to the poor processing performance of titanium, high processing cost, and low efficiency in manufacturing complex products, the application of titanium is greatly limited. 3D printing technology can fuse materials into one-time molding, or build three-dimensional objects by layer-by-layer printing. It has the advantages of rapid prototyping and easy customization. The required powder should have good fluidity, low oxygen content, loose Therefore, the ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/20B33Y70/00C22B34/12
CPCB22F9/20B33Y70/00C22B34/1277
Inventor 王东生赵青娥黄家旭刘亚东
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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