Process for preparing titanium and titanium alloy from titanium hydride powder

A technology for powder preparation and titanium hydride, which is applied in the production and processing of titanium and titanium alloys, and in the field of metal powder preparation and production, can solve the problems of insufficient product density, increase production cost, shorten process flow, etc., and achieve low cost and high yield. , the effect of short process

Active Publication Date: 2011-01-05
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes advantage of the powder metallurgy method, shortens the process flow, improves the finished product rate, and reduces energy consumption. However, the powder yield in the process of smelting and atomizing pulverization is still a bottleneck restrict

Method used

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  • Process for preparing titanium and titanium alloy from titanium hydride powder
  • Process for preparing titanium and titanium alloy from titanium hydride powder
  • Process for preparing titanium and titanium alloy from titanium hydride powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Raw materials: According to product requirements, select corresponding grades of titanium sponge in accordance with GB / T2524-2002 (revised edition). Long-term storage of titanium sponge needs to be dried. Drying must be done under vacuum to avoid oxidation. Drying process: temperature 200℃, time 1hour, vacuum degree 1×10 -2 Pa;

[0023] Hydrogenation: Put titanium sponge into hydrogenation furnace for hydrogenation. Vacuum must be drawn before heating and feeding hydrogen, the vacuum degree is 1×10 -2 Pa. Hydrogenation process: temperature 200°C, time 3 hours, hydrogen pressure in the furnace > 1 atmosphere. Hydrogen must be purified by purification facilities;

[0024] Crushing: Put titanium hydride powder into a ball mill for mechanical crushing. Classify after crushing, and the crushing process must be carried out under a protective atmosphere;

[0025] According to product requirements, titanium hydride powder with suitable particle size grade is used for ne...

Embodiment 2

[0029] Raw materials: According to product requirements, select corresponding grades of titanium sponge in accordance with GB / T2524-2002 (revised edition). Long-term storage of titanium sponge needs to be dried. Drying must be done under vacuum to avoid oxidation. Drying process: temperature 210℃, time 1hour, vacuum degree 1×10 -3 Pa;

[0030] Hydrogenation: Put titanium sponge into hydrogenation furnace for hydrogenation. Vacuum must be drawn before heating and feeding hydrogen, the vacuum degree is 1×10 -4 Pa. Hydrogenation process: temperature 700°C, time 3 hours, hydrogen pressure in the furnace > 1 atmosphere. Hydrogen must be purified by purification facilities;

[0031] Crushing: Put titanium hydride powder into a ball mill for mechanical crushing. Classify after crushing, and the crushing process must be carried out under a protective atmosphere;

[0032] According to product requirements, titanium hydride powder with suitable particle size grade is used for ne...

Embodiment 3

[0036] Raw materials: According to product requirements, select corresponding grades of titanium sponge in accordance with GB / T2524-2002 (revised edition). Long-term storage of titanium sponge needs to be dried. Drying must be done under vacuum to avoid oxidation. Drying process: temperature 200℃, time 1hour, vacuum degree 1×10 -2 Pa~1×10 -3 Pa;

[0037] Hydrogenation: Put titanium sponge into hydrogenation furnace for hydrogenation. Vacuum must be drawn before heating and feeding hydrogen, the vacuum degree is 1×10 -2 Pa~1×10 -4 Pa. Hydrogenation process: temperature 200-700 ° C, time 3 hours, hydrogen pressure in the furnace > 1 atmosphere. Hydrogen must be purified by purification facilities;

[0038] Crushing: Put titanium hydride powder into a ball mill for mechanical crushing. Classify after crushing, and the crushing process must be carried out under a protective atmosphere;

[0039] According to product requirements, titanium hydride powder with suitable part...

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Abstract

The invention discloses a process for preparing a metallurgical powder product from titanium hydride powder preparedmade by hydrogenating sponge titanium instead of titanium powder. The process comprises the following steps of: firstly, hydrogenating sponge titanium, crushing and, rating and mixing brittle titanium hydride, and mixing the titanium hydride with an alloy element; and then, carryingout near-net shape pressing to finish dehydrogenation in a vacuum sintering process. In the process of directly forming the titanium hydride powder, because of the secondary crushing of the brittle titanium hydride powder, the pressed green density is higher than that obtainedan occasion when titanium or titanium alloy powder is used, and the titanium is prevented from being oxidized. In the sintering process, the density of a sintering blank can rapidly rise (to be higher than 99 percent) because of the decomposition of the titanium hydride. The method has the characteristics short process flows, high yield and product density, low cost and oxygen content and good performance.

Description

technical field [0001] The invention relates to the field of metal powder preparation and production, in particular to the field of production and processing of titanium and titanium alloys. Background technique [0002] Production of titanium materials such as figure 1 Firstly, the sponge titanium and its alloys must be melted and cast into large ingots, then blanked, forged, and then various titanium materials are obtained by rolling, extrusion, etc., and finally mechanically processed to produce products. This method has a long process route, large investment in equipment, high energy consumption and high loss in titanium smelting, and a low rate of blanking and rolling, resulting in high production costs. [0003] The traditional powder metallurgy method produces titanium materials such as figure 2 , first melt the titanium and its alloys and then atomize to make powder, after classification and mixing, carry out near-net shape pressing, and then vacuum sintering. Th...

Claims

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Application Information

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IPC IPC(8): B22F3/16C01B6/02C22F1/02
Inventor 方树铭雷霆房志刚田卫平李皓李晓阳单鹏裴崇尚青亮周林张家敏刘捷李红梅
Owner KUNMING METALLURGY INST
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