高浓度碳氮共渗已在重负荷齿轮的生产上应用多年。实践证明,该工艺不仅具有良好的工艺性能,而且显著提高齿轮的使用寿命。高浓度碳氮共渗层的主要特点是:表层为数量较多的碳氮化合物;次层存在着大量的残留奥氏体,渗层约为原渗碳层的1/2左右。 由于试验和分析手段的缺乏,有关共渗表层碳氮化合物和次层残留奥氏体对其表面 High-concentration carbonitriding has been used in heavy-duty gear production for many years. Practice has proved that the process not only has good process performance, but also significantly improve the service life of gear. The main features of the high concentration carbonitrided layer are as follows: the surface layer is a large number of carbonitrides; a large amount of retained austenite exists in the sublayer, and the layer is about 1/2 of the original carburized layer. Due to the lack of test and analysis means, the co-infiltration of surface carbonitrides and sub-retained austenite on the surface