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应用真空电阻炉高温渗氮、X射线衍射、惰气熔融法氧氮分析等实验测试方法,研究了粒度、温度等因素对金属锰渗氮的影响,热力学计算分析表明,高纯氢气在高温渗氮气氛中可有效抑制金属锰在渗氮的同时发生氧化,结合Mn-N相图和渗氮实验研究结果,氮含量低于Mn4N的计量组成时,渗氮试样的主要相组成为氮化锰稳定相Mn4N和残余金属锰α-Mn。渗氮试样的氮含量大于Mn4N的计量组成时,主要相组成为氮化锰稳定相Mn4N和亚稳定相ζ(计量组成约为Mn2N)。
The effects of particle size, temperature and other factors on the nitriding of manganese metal were studied by means of experimental methods such as high temperature nitriding, X-ray diffraction and nitrogen and nitrogen analysis by inert gas melting method. The thermodynamic calculations show that the high temperature hydrogen permeation Nitrogen atmosphere can effectively inhibit the oxidation of metal manganese nitriding at the same time, combined with the Mn-N phase diagram and nitriding experimental results, the nitrogen content is lower than the measured composition of Mn4N, nitriding sample main phase composition of nitriding Manganese stable phase Mn4N and residual manganese metal α-Mn. When the nitrogen content of the nitrided sample is larger than that of Mn4N, the main phases are the Mn4N Mn stable phase and the metastable phase ζ (the measured composition is about Mn2N).