改变炉压可迅速排除炉膛内氧、水蒸气等有害气体，可加速渗碳、渗氮过程。
By altering the furnace pressure rapidly, baneful gases, such as oxygen and vapour, could be eliminated from the chamber. Therefore, cementite and nitriding processes are accelerated.
利用X射线衍射仪和扫描电镜研究了稀土催渗离子渗氮过程中，稀土与氧之间的作用对催渗效果的影响。
Effect of reaction of rare earth to oxygen on catalysis effect in plasma nitriding process catalyzed by rare earth has been studied with X-ray diffractometer and scanning electron microscopy.
结果表明，固态渗氮过程中钢中氮的平均质量分数与渗氮时间的平方根成正比，渗氮反应速率受钢的化学成分影响；
When the temperature was higher than 1373 K, the dissolved nitrogen would release and the rate of nitrogen release was influenced by chemical composition of those steels.
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