Hydrogen plasma deoxidation method for chromium powder
A technology of hydrogen plasma and chromium powder is applied in the field of ion deoxidation, which can solve the problems of small processing capacity, long time and sintering.
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Embodiment 1
[0026] A hydrogen plasma deoxidation method of chromium powder, comprising the following steps:
[0027] 1) Select the metal chromium block, remove the surface skin, oxide film and nitrogen film; then use the hydraulic coarse crusher with circulating water cooling device to mechanically crush the chromium block to make it into particles below 3mm;
[0028] 2) Using the low-temperature brittleness of chromium, immerse the metal chromium particles in liquid nitrogen, and perform low-temperature vibration grinding at the same time. The low-temperature vibration grinding uses nano-Al 2 o 3 with ZrO 2 The vibrating mill cylinder liner and grinding body made of mixed high-toughness ceramic materials are carried out for 3 hours;
[0029] 3) Wash the metal chromium powder ground by low-temperature liquid nitrogen three times with ethanol, each time with an amount of 600ml, then use a vacuum system with filter paper to filter, and then in a vacuum oven, at 80°C and a vacuum of 94.5KP...
Embodiment 2
[0033] A hydrogen plasma deoxidation method of chromium powder, comprising the following steps:
[0034] 1) Select the metal chromium block, remove the surface skin, oxide film and nitrogen film; then use the hydraulic coarse crusher with circulating water cooling device to mechanically crush the chromium block to make it broken into particles below 3mm;
[0035] 2) Using the low-temperature brittleness of chromium, immerse the metal chromium particles in liquid nitrogen, and perform low-temperature vibration grinding at the same time. The low-temperature vibration grinding uses nano-Al 2 o 3 with ZrO 2 The vibrating mill cylinder liner and grinding body made of mixed high-toughness ceramic materials are carried out for 5 hours;
[0036] 3) Wash the metal chromium powder ground by low-temperature liquid nitrogen three times with ethanol, each dosage is 500ml, then use a vacuum system with filter paper to filter, and then in a vacuum oven, at 80°C and a vacuum of 96.5KPa Dry...
Embodiment 3
[0040] A hydrogen plasma deoxidation method of chromium powder, comprising the following steps:
[0041] 1) Select the metal chromium block, remove the surface skin, oxide film and nitrogen film; then use the hydraulic coarse crusher with circulating water cooling device to mechanically crush the chromium block to make it broken into particles below 3mm;
[0042] 2) Using the low-temperature brittleness of chromium, immerse the metal chromium particles in liquid nitrogen, and perform low-temperature vibration grinding at the same time. The low-temperature vibration grinding uses nano-Al 2 o 3 with ZrO 2 The vibrating mill cylinder liner and grinding body made of mixed high-toughness ceramic materials are carried out for 4 hours;
[0043] 3) Wash the metal chromium powder ground by low-temperature liquid nitrogen three times with ethanol, each dosage is 550ml, then use a vacuum system with filter paper to filter, and then in a vacuum oven, at 80°C and a vacuum of 95.5KPa Dry...
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