Chromium carbonitride strengthening agent and preparation method thereof
A technology of chromium carbonitride and strengthening agent, applied in the field of chromium carbonitride strengthening agent and its preparation, can solve the problems of uniform composition of difficult structure, refined grain structure, difficult to meet requirements, etc., and achieve high comprehensive mechanical properties, The effect of uniform organizational structure and low price
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Embodiment 1
[0025] The steps of this embodiment are as follows:
[0026] (1) Ingredients and molding
[0027] Raw material: Cr 2 O 3 Powder 154g, graphite powder 48g, Fe powder 2g, Si powder 1g and Mn powder 1g. The weighed raw material powders are wet-milled and mixed with a ball mill, using tungsten carbide as the grinding ball and alcohol as the ball milling medium. The quality of the ball: Material quality: the quality of alcohol = 8:1:1.6, the speed of ball milling is 40r / min, the raw material powder is mixed uniformly by ball milling, the mixture is separated and the alcohol is volatilized and pressed into a blank of Φ20mmx10mm under a pressure of 50Mpa;
[0028] (2) Sintering
[0029] Put the billet prepared in step (1) into a reaction furnace and heat it at a heating rate of 5°C / min. When the temperature in the furnace reaches 680°C, pass high-purity nitrogen (purity 5N) into the furnace and keep it at this temperature for 1 hour After the holding time is reached, the furnace temperature...
Embodiment 2
[0032] The steps of this embodiment are as follows:
[0033] (1) Ingredients and molding
[0034] Raw materials: CrO powder 68g, CrO 2 Powder 84g, activated carbon powder 48g, Fe 2 O 3 Powder 6g and Si powder 4g, the measured raw material powders are mixed with a ball mill by wet ball milling, using tungsten carbide as the grinding ball, alcohol as the ball milling medium, the quality of the ball: the quality of the material: the quality of the alcohol = 8:1: 1.6, the speed of ball milling is 40r / min, the raw material powder is mixed uniformly by ball milling, the mixture is separated and the alcohol is volatilized and pressed into a blank of Φ20mmx10mm under a pressure of 50Mpa;
[0035] (2) Sintering
[0036] Put the billet prepared in step (1) into a reaction furnace and heat it at a temperature increase rate of 10°C / min. When the temperature in the furnace reaches 650°C, pass high-purity nitrogen (purity 5N) into the furnace and keep it at this temperature for 1.5 h. After the ho...
Embodiment 3
[0039] The steps of this embodiment are as follows:
[0040] (1) Ingredients and molding
[0041] Raw material: CrO 3 Powder 200g, charcoal powder 86g, Fe powder 4g, Co powder 2g and Mn powder 3g. The measured raw material powders are wet-milled and mixed with a ball mill, using tungsten carbide as the grinding ball and alcohol as the ball milling medium. The quality of the ball: Material quality: the quality of alcohol = 8:1:1.6, the speed of ball milling is 40r / min, the raw material powder is mixed uniformly by ball milling, the mixture is separated and the alcohol is volatilized and pressed into a blank of Φ20mmx10mm under a pressure of 50Mpa;
[0042] (2) Sintering
[0043] Put the billet prepared in step (1) into a reaction furnace and heat it at a heating rate of 7°C / min. When the temperature in the furnace reaches 670°C, pass high-purity nitrogen (purity 5N) into the furnace and keep it at this temperature for 1.2 h. After the holding time is reached, the furnace temperature i...
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