一、前言渗碳和碳氮共渗工艺已经应用几十年了,对保证汽车、拖拉机、石油、化工、矿山等各类机械零件的质量起到十分重要作用。气体渗入法虽有许多优点,如碳势可控,渗后直接淬火等,但是,其生产周期较长,能源消耗大,因此生产率较低。在当前,材料和能源处于紧张时期,随着机械工业的发展,渗碳和碳氮共渗工艺的应用也正在迅速扩大,这种矛盾越来越显得尖锐,因此,十分有必要开展优质快速 I. Preface Carburizing and carbonitriding processes have been used for decades and have played a very important role in ensuring the quality of various mechanical parts such as automobiles, tractors, petroleum, chemicals, and mines. Although the gas infiltration method has many advantages, such as controllable carbon potential, direct quenching after infiltration, but its longer production cycle, energy consumption, and therefore lower productivity. At present, materials and energy are in a period of tension. With the development of the machinery industry, the application of carburizing and carbonitriding processes is also rapidly expanding, and the contradiction has become increasingly sharp. Therefore, it is very necessary to develop high quality and fast