20年代渗氮开始用于生产,50年代以后出现了盐浴软氮化和气体软氮化,并且获得了日益广泛的应用。70年代以来,渗氮技术进入了大发展阶段。在工艺方面,主要围绕着缩短工艺时间,发展多元共渗、新加热技术、新渗剂、新钢种以及各种复合处理工艺等开展了试验究究。在渗氮理论方面,从热力学出发,提出了渗氮气氛氮势的概念及其表达方式,探讨了氮势、碳势与工件组织及性能的关系,通 Nitriding started to be used in the production in the 1920s. After the 1950s, salt bath nitrocarburizing and gas nitrocarburizing occurred, and their applications were increasingly widespread. Since the 1970s, nitriding technology has entered a stage of great development. In terms of technology, we mainly conducted experiments on the aspects of shortening the processing time, developing multiple infiltration, new heating technology, new penetration agents, new steel types and various composite treatment technologies. In terms of nitriding theory, from the thermodynamics, put forward the concept of nitriding nitrogen potential and its expression, discussed the nitrogen potential, carbon potential and the relationship between the organization and performance of the workpiece,