20Cr2Ni4A钢稀土渗碳的组织与齿轮的接触疲劳强度  

MICROSTRUCTURE AND GEAR CONTACT FATIGUE STRENGTH OF STEEL 20Cr4Ni2A CARBURIZED WITH RARE EARTH

作　　者：朱法义[1] 蔡成红 阎牧夫[1] 刘志儒[1] 陈静东[1] 马崇信 张林[1] 张照智[1] 

机构地区：[1]哈尔滨工业大学,淮南煤矿机械厂,郑州机械研究所,哈尔滨大学材料科学与工程学院

出　　处：《金属热处理学报》1994年第4期31-37,共7页

摘　　要：采用８６０℃稀土高碳势渗碳，在２０ｃｒ２Ｎｉ４Ａ钢的过共析区沉淀析出大量细小弥散的碳化物，使奥氏体的稳定性大幅度下降，从而实现了渗碳后直接淬火。与９２０℃传统渗碳后二次加热淬火处理工艺相比，用新工艺处理后的齿轮接触疲劳强度可提高近一个数量级。In this paper,the steel 20Cr2Ni4A is carburized under high carbon potential at 860℃ with rare earth element,the stabillty of the austenite is decreased remarkably because of a great deal of fine granular dispored carbides in hypereutectiod zo ne of carburized case, and can also be quenched directly after carburizing.The experiment results show that the contact fatigue strength of 20Cr2Ni4A carburized by new process mentioned above,almost increases by one order of magnitude compared with conventional one.

关 键 词：渗碳 接触疲劳 稀土族 齿轮 铬镍钢 

分 类 号：TG162.73[金属学及工艺—热处理]