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
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[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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