Method for preparing high-purity superfine low-oxygen titanium hydride powder and dehydrogenated titanium powder

A titanium hydride powder, high-purity technology, which is applied in the field of powder metallurgy in the powder metallurgy process, can solve the problems of reduced powder quality, high surface activity, and increased oxygen content, and achieves reduced production costs, uniform particle size distribution, and low oxygen content. Effect

Inactive Publication Date: 2016-04-20
PANZHIHUA UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In the above production process, hydrogenated titanium powder or titanium powder after dehydrogenation will be exposed to the air due to individual processes, such as hydrogenation out of the furnace, grinding out of the tank, dehydrogenation out of the furnace, etc., especially the fine powder after hydrogenation and dehydrogenation , because of its high surface activity, the surface is easily oxidized, resulting in an increase in its oxygen content, thereby reducing the quality of the powder

Method used

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preparation example Construction

[0023] Based on the above purpose and principle, the present invention provides a method for preparing high-purity fine low-oxygen titanium hydride powder, the method comprising the following steps:

[0024] 1) Hydrogenate the titanium sponge at 350-680°C and 0.3-0.6MPa high-purity hydrogen pressure for 3-8 hours to obtain coarse titanium hydride powder with a particle size of 80-500 μm;

[0025] 2) The above-mentioned coarse-grained titanium hydride powder is subjected to airflow grinding in a closed-loop jet mill under the pressure of 0.35-0.6MPa high-purity argon gas. , to obtain titanium hydride powder with required particle size and oxygen content specifications;

[0026] 3) Vacuum packaging the above titanium hydride powder to obtain a high-purity fine low-oxygen titanium hydride powder product.

[0027] Wherein, in the preparation method of the above-mentioned high-purity fine low-oxygen titanium hydride powder, the sponge titanium is at least grade 4 sponge titanium, ...

Embodiment 1

[0048] Preparation of titanium hydride powder with 500 mesh and 0.20wt% oxygen content

[0049] 1. Hydrogenate grade 4 sponge titanium with an oxygen content of 0.30wt% at 580°C and 0.55MPa high-purity hydrogen pressure for 6 hours to obtain coarse titanium hydride with an average particle size of 80μm;

[0050] 2. The above-mentioned titanium hydride powder is subjected to jet milling in a closed-loop jet mill under 0.6MPa high-purity argon pressure conditions to obtain a titanium hydride powder with a purity greater than 98.8wt%, an average particle size of 25 μm (500 mesh), and an oxygen content of 0.20wt%. Titanium hydride powder;

[0051] 3. Carry out vacuum packaging of the above-mentioned titanium hydride powder to obtain high-purity fine low-oxygen titanium hydride powder product.

[0052] Preparation of dehydrogenated titanium powder with 500 mesh and 0.19wt% oxygen content

[0053] 1. Hydrogenate grade 4 sponge titanium with an oxygen content of 0.30wt% at 580°C an...

Embodiment 2

[0059] Preparation of titanium hydride powder with 400 mesh and oxygen content of 0.18wt%

[0060] 1. Hydrogenate grade 4 sponge titanium with an oxygen content of 0.30wt% at 680°C and 0.55MPa high-purity hydrogen pressure for 4 hours to obtain coarse titanium hydride with an average particle size of 100μm;

[0061] 2. The above-mentioned titanium hydride powder is subjected to jet milling in a closed-loop jet mill under 0.6MPa high-purity argon pressure conditions to obtain a purity greater than 98.8wt%, an average particle size of 38 μm (400 mesh), and an oxygen content of 0.18wt%. Titanium hydride powder;

[0062] 3. Carry out vacuum packaging of the above-mentioned titanium hydride powder to obtain high-purity fine low-oxygen titanium hydride powder product.

[0063] Preparation of 400 mesh, oxygen content of 0.17wt% dehydrogenated titanium powder

[0064] 1. Hydrogenate grade 4 sponge titanium with an oxygen content of 0.30wt% at 680°C and 0.55MPa high-purity hydrogen p...

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Abstract

The invention relates to a method for preparing high-purity superfine low-oxygen titanium hydride powder and dehydrogenated titanium powder and belongs to the technical field of powder producing in the powder metallurgy process. The method is characterized in that hydrogenation-dehydrogenation is combined with the closed-loop airflow milling process, titanium sponge is hydrogenated and broken to obtain coarse-particle titanium hydride powder, a closed-loop airflow milling system is used to break the titanium hydride powder again, and automatic grading and vacuum packaging are performed to obtain the titanium hydride powder; the titanium hydride powder is dehydrogenated, the closed-loop airflow milling system is used for refining, and automatic grading and vacuum packaging are performed to obtain the dehydrogenated titanium powder. The method has the advantages that the whole process is free of pollution and low in oxidation, continuous production can be achieved, and the prepared titanium hydride powder and dehydrogenated titanium powder are high in purity, even in particle size and low in oxygen content.

Description

technical field [0001] The invention belongs to the technical field of powder making in the powder metallurgy process, and in particular relates to a method for preparing high-purity microfine low-oxygen hydrogenated titanium powder and dehydrogenated titanium powder. Background technique [0002] As a high-quality light metal structural material and important functional material, titanium and titanium alloys have low density, high specific strength, high specific stiffness, non-magnetic properties, corrosion resistance, high temperature mechanical properties, fatigue resistance and creep properties, and biophase properties. Good comprehensive performance such as good capacitance, has broad application prospects in aerospace, ships, weapons, petrochemical, medical and other fields. However, due to the disadvantages of the traditional titanium smelting process, such as complex process, long cycle time, high energy consumption and low resource utilization rate, the cost and pr...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F9/02
CPCB22F9/04B22F9/023B22F2009/044B22F2999/00B22F2201/11
Inventor 杨绍利王涛马兰廖先杰李俊翰李彬彬
Owner PANZHIHUA UNIV
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