Partial dehydriding, sintering and densification method of hydride of vanadium, chromium and titanium alloy
A vanadium-chromium-titanium alloy and titanium alloy technology, which is applied in the field of activation sintering and densification, and partial dehydrogenation of hydrides of vanadium-chromium-titanium alloys, which can solve the problem of low density, high hydrogen content, sintering cracking of vanadium-chromium-titanium alloys problems, to achieve the effects of low manufacturing cost, reduced hydrogen content, and improved density
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Embodiment 1
[0021] Present embodiment technological step is as follows:
[0022] a. The fine powder of vanadium, chromium and titanium with a particle size of 20μm--35μm, after partial dehydrogenation treatment at a low temperature of 300°C, is mixed in a low-humidity and low-oxygen glove box, and encapsulated by a soft film. The low-humidity and low-oxygen gloves The box is a high-purity argon atmosphere, and the oxygen content is less than 20ppm, and the water vapor concentration is less than 10ppm, and then after 200MPa / 8min cold isostatic pressing, a vanadium-chromium-titanium alloy cold compact is obtained;
[0023] b. Place the vanadium-chromium-titanium alloy cold compact in a high-vacuum tungsten wire sintering furnace for cold degassing, and gradually heat up after the vacuum degree is lower than 5E-2Pa, and set up a heat preservation platform at 400°C, 600°C and 900°C. It is used for partial dehydrogenation and activation sintering of vanadium hydride and titanium hydride at low...
Embodiment 2
[0026] Present embodiment technological step is as follows:
[0027] a. The fine powder of vanadium, chromium and titanium with a particle size of 20μm--35μm, after partial dehydrogenation treatment at 450°C, is mixed in a low-humidity and low-oxygen glove box, and encapsulated by a soft film. The low-humidity and low-oxygen gloves The box is a high-purity argon atmosphere, and the oxygen content is less than 20ppm, and the water vapor concentration is less than 10ppm, and then after 180MPa / 10min cold isostatic pressing, a vanadium-chromium-titanium alloy cold compact is obtained;
[0028] b. Place the vanadium-chromium-titanium alloy cold compact in a high-vacuum tungsten wire sintering furnace for cold degassing, and gradually heat up after the vacuum degree is lower than 5E-2Pa, and set up a heat preservation platform at 400°C, 600°C and 900°C. It is used for partial dehydrogenation and activation sintering of vanadium hydride and titanium hydride at low temperature;
[00...
Embodiment 3
[0031] Present embodiment technological step is as follows:
[0032] a. The fine powder of vanadium, chromium and titanium with a particle size of 20μm--35μm, after partial dehydrogenation treatment at a low temperature of 500°C, is mixed in a low-humidity and hypoxia glove box, and encapsulated by a soft film. The low-humidity and hypoxia gloves The box is a high-purity argon atmosphere, and the oxygen content is less than 20ppm, and the water vapor concentration is less than 10ppm, and then after 220MPa / 5min cold isostatic pressing, a vanadium-chromium-titanium alloy cold compact is obtained;
[0033] b. Place the vanadium-chromium-titanium alloy cold compact in a high-vacuum tungsten wire sintering furnace for cold degassing, and gradually heat up after the vacuum degree is lower than 5E-2Pa, and set up a heat preservation platform at 400°C, 600°C and 900°C. It is used for partial dehydrogenation and activation sintering of vanadium hydride and titanium hydride at low tempe...
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