一前言近年来催化渗氮,离子渗氮和低温气体碳氮共渗(即气体软氮化)等热处理新工艺有了迅速发展,对提高产品质量取得了较好效果,但对于不同材料的渗氮层深度测量和热处理质量检验目前国内尚无统一的测量方法和检验标准,给研究渗氮工艺和稳定生产都造成不少困难。本标准是为满足生产和科研急需,针对上述要求而制定的有关渗氮层的测量方法和金相组织评级标准。该工作是由一机系统金相标准与图谱协调会拟定,并由部正式下达的一项科研项目。确定由一机部机电研 A foreword In recent years, catalytic nitriding, ion nitriding and low temperature gas carbonitriding (ie, gas nitrocarburizing) and other heat treatment has been the rapid development of new processes to improve product quality has achieved good results, but for different materials seepage Nitrogen layer depth measurement and heat treatment quality testing At present, there is no uniform measurement methods and testing standards to nitriding process and stable production have caused many difficulties. This standard is to meet the urgent need of production and scientific research, in response to the above requirements of the nitriding layer measurement methods and metallographic organization rating standards. This work was developed by the Coordination of Metallographic Standards and Atlas of a Machine System and was officially released by the Ministry as a research project. Determined by a mechanical and electrical research institute