铁道部科学研究院金属化学研究所金属室1975年着手进行高速钢刀具离子氮化工艺的探讨,同年5月试验成功刀具氮化后无需刃磨便可直接使用的离子氮化工艺。其后与铁道部二七机车厂工具车间协作,利用铁研院金化所的6千瓦离子氮化炉,以氨作为工作气体,以 The metal department of the Institute of Metal Chemistry of the Research Institute of the Ministry of Railways began to discuss the ion nitriding process of high-speed steel tools in 1975. In the same year, an ion nitriding process that can be directly used without nitriding after successfully nitriding the tool was tested in May of the same year. Afterwards, in collaboration with the tool shop of the Erqi Engine Plant of the Ministry of Railways, the 6-kilowatt ion nitriding furnace of Tiejin Institute was used to use ammonia as a working gas.