机车牵引齿轮直接淬火工艺的探讨  

Discussion on Direct Quenching Process after Carburizing for the Locomotive Driving Gear

作　　者：黄星[1] 孙铭炎 庄军[1] 华公平[1] 

机构地区：[1]中国南车集团戚墅堰机车车辆工艺研究所,江苏常州213011 [2]常州市热处理专业委员会,江苏常州213111

出　　处：《热处理》2008年第5期24-27,共4页Heat Treatment

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.

关 键 词：直接淬火 弯曲疲劳试验 晶粒度 表面碳浓度 

分 类 号：TG113[金属学及工艺—物理冶金] TG162.73[金属学及工艺—金属学]