一、绪言在渗碳性气体中添加氨(NH_3)进行所谓的气体碳氮共渗,早已有很多研究。气体碳氮共渗大致可分为二种:一种是在比较高的温度下添加百分之几的氨,由于渗氮而提高渗碳表层的淬透性,所以也称为气体渗碳的改进方法,可称之为“碳氮共渗”。另一种是在低温下添加较多的氨,使钢表面生成碳氮化物,这是气体氮化的变种。 First, the introduction In the carburizing gas added ammonia (NH_3) for the so-called gas carbonitriding, has long been a lot of research. Gas carbonitriding can be roughly divided into two kinds: one is to add a few percent of the ammonia at higher temperatures, due to nitriding and improve the hardenability of the carburized surface, it is also known as gas carburizing Improved method, can be called “carbonitriding ”. The other is to add more ammonia at low temperatures, so that the surface of the steel to generate carbonitrides, which is a variant of gas nitriding.