一、前 言 对如何提高高强度钢重载荷齿轮的使用寿命及保持其制造精度,正为一些科学工作者所重视。资料[1]表明,经碳、氮复合热处理(渗破空冷+软氮化+淬火并低温回火)与单一渗碳处理工艺相比,接触疲劳性能有明显提高,同时具有变形量小、节省能源等优点。 First, the preface to how to improve the service life of high-strength steel heavy-duty gear and maintain its manufacturing accuracy, is valued by some scientific workers. The data [1] shows that the contact fatigue performance is obviously improved compared with the single carburizing treatment through the combined heat treatment of carbon and nitrogen (seepage air cooling + nitrocarburizing + quenching and tempering at low temperature), meanwhile, it has the advantages of small deformation and saving Energy and other advantages.