20CrMnTi钢轴套深层渗碳质量控制关键技术  

Key technologies of deep carburizing quality control for 20CrMnTi steel axle sleeve

作　　者：尹承锟 何龙祥 刘俊祥 丛培武 Yin Chengkun;He Longxiang;Liu Junxiang;Cong Peiwu(Beijing Research Institute of Mechanical and Electrical Technology,Ltd.,Beijing 100083,China)

机构地区：[1]北京机电研究所有限公司

出　　处：《金属热处理》2019年第12期215-218,共4页Heat Treatment of Metals

基　　金：先进成形与焊接共性关键技术创新能力平台建设(2018ZX04044001)

摘　　要：对20CrMnTi钢轴套进行真空低压脉冲渗碳,采取缩短渗碳时间、改变乙炔流量、增加扩散时间、降低淬火温度及增加保温时间的优化工艺,达到了渗碳有效硬化层深度2.8 mm,表面碳化物呈弥散分布、显微组织马氏体及残留奥氏体1级、心部铁素体2级要求。Pulse carburizing of 20CrMnTi axle sleeve under vacuum and low pressure was carried out.After treated by optimized process of shortening carburizing time,changing acetylene flow rate,increasing diffusion time,reducing quenching temperature and prolonging holding time,the effective carburizing layer depth reaches 2.8 mm.The carbides in the carburized layer distribute dispersedly,and the martensite and the retained austenite of the carburized layer reach grade 1,and the ferrite in the core reaches grade 2.

关 键 词：20CrMnTi钢轴套 真空渗碳 碳化物 显微组织 

分 类 号：TG156.8[金属学及工艺—热处理]