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Preparation method of high-purity micro-fine low-oxygen titanium powder

A high-purity, micro-technology, applied in the field of micro-, high-purity, low-oxygen titanium powder preparation, can solve problems such as titanium powder blowout, and achieve the effect of low oxygen content and high purity

Inactive Publication Date: 2013-12-11
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of oxygenation caused by titanium powder explosion in the HDH process, prepare high-purity, fine, low-oxygen titanium powder, and provide high-quality raw materials for the preparation of high-performance powder titanium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: prepare the titanium powder of 200 orders, oxygen content 0.12wt.%

[0018] 1. Hydrogenate grade 1 titanium sponge with an oxygen content of 0.75wt.% at 480°C and 0.1MPa high-purity hydrogen pressure for 10 hours to obtain coarse titanium hydride with an average particle size of 500 μm;

[0019] 2. The above-mentioned titanium hydride powder is subjected to jet milling under the pressure of 0.3MPa high-purity argon to obtain titanium hydride with an average particle size of 100 μm;

[0020] 3. Vacuum dehydrogenate the jet-milled titanium hydride at 600°C for 12 hours to obtain titanium powder;

[0021] 4. Jet milling the titanium powder under the pressure of 0.3MPa high-purity argon gas to obtain titanium powder with a purity of 99.7%, an average particle size of 75 μm (200 mesh), and an oxygen content of 0.12wt.%.

[0022] 5. Vacuum-encapsulate the above-mentioned titanium powder to obtain high-purity micro-fine low-oxygen titanium powder.

Embodiment 2

[0023] Embodiment 2: prepare the titanium powder of 325 orders, oxygen content 0.13wt.%

[0024] 1. Hydrogenate grade 1 titanium sponge with an oxygen content of 0.75wt.% at 600°C and 0.2MPa high-purity hydrogen pressure for 8 hours to obtain coarse titanium hydride with an average particle size of 350μm;

[0025] 2. Jet-milling the above-mentioned titanium hydride powder under 0.5MPa high-purity argon pressure to obtain titanium hydride with an average particle size of 75 μm;

[0026] 3. Vacuum dehydrogenate the jet-milled titanium hydride at 650°C for 10 hours to obtain titanium powder;

[0027] 4. Jet milling the titanium powder under the pressure of 0.5MPa high-purity argon to obtain titanium powder with a purity of 99.7%, an average particle size of 45 μm (325 mesh), and an oxygen content of 0.13wt.%.

[0028] 5. Vacuum-encapsulate the above-mentioned titanium powder to obtain high-purity micro-fine low-oxygen titanium powder.

Embodiment 3

[0029] Embodiment 3: prepare the titanium powder of 500 orders, oxygen content 0.14wt.%

[0030] 1. Hydrogenate grade 1 titanium sponge with an oxygen content of 0.75wt.% at 700°C and 0.25MPa hydrogen pressure for 7 hours to obtain coarse titanium hydride with a particle size of 200μm;

[0031] 2. Jet milling the above-mentioned titanium hydride powder under the pressure condition of 0.6 MPa high-purity argon to obtain titanium hydride with an average particle size of 45 μm;

[0032] 3. Vacuum dehydrogenate the jet-milled titanium hydride at 700°C for 8 hours to obtain titanium powder;

[0033] 4. Jet milling the titanium powder under 0.6MPa high-purity argon pressure condition to obtain titanium powder with a purity of 99.7%, an average particle size of 30 μm (500 mesh), and an oxygen content of 0.14wt.%.

[0034] 5. Vacuum-encapsulate the above-mentioned titanium powder to obtain high-purity micro-fine low-oxygen titanium powder.

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Abstract

The invention provides a preparation method of high-purity micro-fine low-oxygen titanium powder, which belongs to the technical field of powder preparation in the powder metallurgy process. The preparation method is characterized by combining hydrogenation and dehydrogenation with a jet milling process, firstly carrying out hydrogenation treatment on a titanium sponge to prepare titanium hydride powder, then utilizing a jet mill to break the titanium hydride, then carrying out vacuum dehydrogenation, and finally utilizing the jet mill to carry out breaking gradation and vacuum package and obtaining a titanium powder product. Compared with the traditional ball milling process, the jet milling process causes no pollution, and iron impurities caused by collision of steel balls in the ball milling process can be avoided; due to jet milling and high-vacuum dehydrogenation treatment, the content of oxygen can be controlled to be lowest, and the powder taking and packaging operations are respectively carried out in a glove box, so that the powder and the air are isolated in the whole process, and further, the prepared high-purity micro-fine low-oxygen titanium powder is prepared.

Description

technical field [0001] The invention relates to a preparation technology of titanium powder, which belongs to the technical field of powder making in powder metallurgy technology, and in particular provides a preparation method of high-purity, microfine and low-oxygen titanium powder. technical background [0002] Titanium and its alloys have properties such as low density, high specific strength, good corrosion resistance, and excellent biocompatibility, and have broad application prospects in aviation, aerospace, military, medical, automotive, sports and leisure industries. However, due to the high production cost at present, the real application is still limited to high-end fields such as aerospace. Casting is the most commonly used preparation technology for titanium alloys. Due to the long process route and low material utilization rate, the cost cannot meet the requirements of the civilian field. Therefore, the development of low-cost titanium preparation technology is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/20
Inventor 郭志猛叶青邵慧萍郝俊杰罗骥
Owner UNIV OF SCI & TECH BEIJING
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