摘要
高速重载机车牵引齿轮通常采用钢20CrMnMo钢和17CrNiMo6钢制造,对这两种钢制齿轮进行了渗碳后直接淬火的工艺试验,然后进行弯曲疲劳试验和金相分析。结果表明,齿轮渗碳、直接淬火后其显微组织和弯曲疲劳极限均符合要求,并优于经重新加热淬火的齿轮,但应控制原材料的奥氏体晶粒度和渗碳层的碳浓度。
The driving gears for high-speed and heavy-duty locomotives were generally made of 20CrMnMo and 17CrNiMo6 steels. The gears of the two types of steel were carburized and directly quenched experimentally. Afterwards, bending fatigue test and metallographic examination were conducted. The experimental results show that the microstructures and bending fatigue limits of gears carburized and directly quenched can fulfill all the requirements and are superior to those of the gears reheated and quenched. Austenitic grain size of raw materials and corbon content of carburized case ,however, are to be controlled.
出处
《热处理》
CAS
2008年第5期24-27,共4页
Heat Treatment
关键词
直接淬火
弯曲疲劳试验
晶粒度
表面碳浓度
direct quenching
bending fatigue test
grain size
surface carbon content
