Method for preparing low-oxygen high-quality hydrogenated and dehydrogenated titanium powder

A technology of hydrogenated dehydrogenated titanium powder and hydrogenated titanium powder, which is applied in the field of powder metallurgy titanium, which can solve the problems of complex equipment process, hidden dangers of using active metals, and increased cost of powder making, and achieve simple preparation process, low price, and applicability strong effect

Active Publication Date: 2020-05-05

UNIV OF SCI & TECH BEIJING

6 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

Although this method can reduce the oxygen content of hydrogenated dehydrogenation titanium powder from several thousand ppm to hundreds of ppm, t...

Abstract

The invention discloses a method for preparing low-oxygen high-quality hydrogenated and dehydrogenated titanium powder, and belongs to the field of powder metallurgy titanium. The method comprises thefollowing steps of by taking sponge titanium, waste titanium, titanium chips or residual titanium leftover materials and the like as a raw material, performing hydrogenation dehydrogenation, adding TiCl2 as a deoxidant, uniformly mixing TiCl2 and titanium powder, and performing annealing treatment, so that the TiCl2, the hydrogenated and dehydrogenated titanium powder and an oxidation film on thesurface of the powder are subjected to oxidation-reduction reaction, gaseous TiClxOy is generated, and the oxygen is removed from the titanium powder, so that the effects of greatly reducing the oxygen content of the titanium powder and purifying the powder are achieved; and in addition, due to the addition of TiCl2, other impurities cannot be introduced to change the characteristics of the titanium powder. The preparation process is simple, extra equipment is not needed, the price of the deoxidant is low, preparation of high-quality and low-cost titanium powder is facilitated, the recyclingrate of residual titanium is greatly increased, and the method has great significance in low-cost preparation and green recyclable generation of titanium industry.

Application Domain

Transportation and packagingMetal-working apparatus

Technology Topic

Powder metallurgyRaw material +2

Examples

Experimental program(2)

Example Embodiment

[0023] Example 1:

[0024] A method for preparing low-oxygen and high-quality hydrogenated dehydrogenation titanium powder uses sponge titanium as a raw material, and the specific preparation steps are as follows:

[0025] (1) Put the titanium sponge into a hydrogen furnace for hydrogenation treatment, the hydrogenation temperature is 600 ℃, and the temperature is kept for 4 hours to obtain the titanium hydride material;

[0026] (2) The titanium hydride material in step (1) is subjected to high-energy ball milling, the ball-to-material ratio is 5:1, and the milling time is 25h, and titanium hydride powder is obtained after crushing;

[0027] (3) Put the titanium hydride powder in step (2) into a vacuum sintering furnace for dehydrogenation treatment, the vacuum degree <1Pa, the dehydrogenation temperature is 700°C, and the heat preservation time is 4h to obtain hydrogenated dehydrogenation titanium powder;

[0028] (4) Combine the hydrogenated dehydrogenated titanium powder in step (3) with TiCl 2 According to the mass ratio of 99:1, weigh in a glove box protected by argon and put it into a mixing tank, then mix on a mixer for 20 hours to obtain a uniform mixed powder;

[0029] (5) Put the mixed powder in step (4) into a vacuum sintering furnace, the vacuum degree is 6*10 -3 Pa, vacuum annealing is performed at 600°C, and the holding time is 3h, to obtain annealed titanium powder;

[0030] (6) The annealed titanium powder obtained in step (5) is crushed, sieved, and vacuum packaged to obtain high-quality hydrogenated pure titanium powder with an oxygen content of 1000 ppm.

Example Embodiment

[0031] Example 2:

[0032] A method for preparing low-oxygen and high-quality hydrogenated dehydrogenation titanium powder, using TC4 titanium scraps as raw materials, and the specific preparation steps are as follows:

[0033] (1) Put the TC4 titanium alloy titanium scraps into a hydrogen furnace for hydrogenation treatment, the hydrogenation temperature is 650℃, and the heat preservation is 7h to obtain the titanium hydride material;

[0034] (2) The titanium hydride material in step (1) is subjected to high-energy ball milling, the ball-to-material ratio is 6:1, and the milling time is 15h, and hydrogenated TC4 titanium alloy powder is obtained after crushing;

[0035] (3) Put the hydrogenated TC4 titanium alloy powder in step (2) into a vacuum sintering furnace for dehydrogenation treatment, the vacuum degree <1Pa, the dehydrogenation temperature is 680℃, and the heat preservation time is 5h to obtain hydrogenation dehydrogenation TC4 titanium alloy powder;

[0036] (4) Combine the hydrogenated dehydrogenation TC4 titanium alloy powder in step (3) with TiCl 2 According to the mass ratio of 90:10, weigh it in a glove box protected by argon, and put it into a mixing tank, and then mix on a mixer for 12 hours to obtain a uniform mixed powder;

[0037] (5) Put the mixed powder in step (4) into a vacuum sintering furnace, and perform vacuum annealing at 700°C with a vacuum degree of 10 -3 Pa, the holding time is 2h, and annealed TC4 titanium alloy powder is obtained;

[0038] (6) The annealed TC4 titanium alloy powder obtained in step (5) is crushed, sieved, and vacuum packaged to obtain high-quality hydrodehydrogenated TC4 titanium alloy powder with an oxygen content of 1300 ppm.

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Method for preparing low-oxygen high-quality hydrogenated and dehydrogenated titanium powder

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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