高浓度渗碳和高浓度碳氮共渗已经成为一种重要的强化机械零件的手段。本文综述了两者的工艺方法和组织性能特点以及对所用钢材的要求,还涉及得到高浓度渗层某些机理的探讨。 High concentration carburizing and high concentration carbonitriding have become an important means of strengthening mechanical parts. This article summarizes the technological process and organizational performance characteristics of both and the requirements of the steel used, and also discusses some of the mechanisms to obtain high concentration of seepage layer.