冷轧连续退火时均热温度和时间对MS1470钢组织和性能的影响  

Effect of Soaking Temperature and Soaking Time on Microstructure and Mechanical Properties of MS1470 Steel during Cold Rolling Continuous Annealing

作　　者：黄书泽[1,2] 李俊[2] 郭文渊[1,2] 孟庆格[1,2] 张凯[1,2] 吕维洁[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]宝山钢铁股份有限公司宝钢分公司冷轧厂,上海200941

出　　处：《机械工程材料》2010年第7期8-11,共4页Materials For Mechanical Engineering

基　　金：宝钢"十一五"规划重大科技攻关项目(D07SAAE400);上海市科技人才计划项目(10XD1420300)

摘　　要：采用光学显微镜、扫描电镜和透射电镜分析了连续退火时均热温度和时间对MS1470马氏体钢板组织的影响,通过拉伸试验研究了均热时间对其力学性能的影响。结果表明:MS1470钢板的抗拉强度、屈服强度随着均热温度的升高(740～820℃)和均热时间的延长(0～180s)逐渐增大,断后伸长率则减小;其显微组织为铁素体和大量马氏体,随着均热时间的增加,马氏体含量增加,组织更加细小均匀。The effects of soaking temperature and soaking time on microstructure and mechanical properties of the MS1470 martensitic steel were investigated by using optical microscopy, scanning electron microscopy, transmission electron microscopy and tensile testing machine. The results show that with the increasing of soaking temperature from 740 ℃ to 820 ℃ and both the tensile strength and yield strength of the MS1470 steel increased the prolongation of soaking time from 0 s to 180 s, the percentage elongation after fracture decreased. The microstructure of MS1470 steel was composed of ferrite and large amount of martensite, With increasing soaking temperature and prolongation soaking time, the volume fraction of martensite increased and the size of the microstructure decreased.

关 键 词：均热时间 MS1470钢 显微组织 力学性能 

分 类 号：TG156.21[金属学及工艺—热处理]