贝氏体钢轨的回火试验研究  

Study on Tempering Test of Bainite Rail

作　　者：李智丽[1] 何建中[1] 梁正伟[1] 张凤鸣 史文义[1] Li Zhi-li;He Jian-zhong;Liang Zheng-wei;Zhang Feng-ming;Shi Wen-yi(Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010

出　　处：《包钢科技》2020年第4期1-4,8,共5页Science & Technology of Baotou Steel

基　　金：国家重点研发计划项目(2017YFB0304504)。

摘　　要：文章对淬火后的75 kg/m贝氏体钢轨在实验室进行了系列回火试验,并对不同回火工艺下钢轨的力学性能、显微组织进行了对比分析,结果表明试验钢轨经320℃保温48 h能够获得最佳的力学性能,满足重载铁路钢轨的使用要求。In the paper,the series of tempering tests of quenched 75 kg/m bainite rail in laboratory are introduced as well as the mechanical properties and microstructure of the rails with different tempering processes are compared and analyzed.The results showed that the optimum mechanical properties of test rails could be achieved with 320℃heat preservation for 48 h,which could satisfy the operating requirements of rail for heavy haul railway.

关 键 词：贝氏体钢轨 回火 力学性能 显微组织 

分 类 号：TG156.6[金属学及工艺—热处理] TG113[金属学及工艺—金属学]