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应用真空电阻炉高温渗氮、X射线衍射分析等实验测试方法 ,研究了粒度、温度、气相组成等因素对金属锰渗氮的影响。工业用气态氮作为渗氮气体的主要气相组成 ,可同时发生金属锰的氮化和氧化 ,生成Mn4N和MnO化合物 ;随渗氮温度的提高 ,锰氧化物的含量相应增高。渗氮气氛中配加氨气 ,使氮气的分压相应降低 ,平衡吸附浓度降低 ,渗氮试样的含氮量降低
The effects of particle size, temperature, gas phase composition and other factors on the nitriding of Mn were studied by means of experimental tests such as high temperature nitriding and X-ray diffraction analysis in vacuum resistance furnace. Industrial gaseous nitrogen as the main gas phase composition of nitriding gas can occur at the same time nitriding and oxidation of metallic manganese to produce Mn4N and MnO compounds. With the increase of nitriding temperature, the content of manganese oxide increases accordingly. In the nitriding atmosphere, ammonia gas is added to reduce the partial pressure of nitrogen, the equilibrium adsorption concentration is decreased, and the nitrogen content of the nitriding sample is decreased