摘要
采用Gleeble-1500D热模拟试验机测定了4Cr5MoSiV1Ti新型热作模具钢在不同冷却速率下过冷奥氏体连续冷却时的膨胀曲线,获得4Cr5MoSiV1Ti钢的临界相变点,绘制其过冷奥氏体连续冷却转变曲线。结果表明:4Cr5MoSiV1Ti钢的加热时先共析铁素体全部溶入奥氏体的终了温度、加热时珠光体向奥氏体转变的开始温度、马氏体转变开始温度、马氏体转变终了温度分别为960,885,370,184℃;当冷却速率低于1℃·s-1时,过冷奥氏体发生铁素体、贝氏体和马氏体相变;当冷却速率在1~10℃·s-1时,发生贝氏体和马氏体相变;当冷却速率大于10℃·s-1时,只发生马氏体相变;随着冷却速率的增加,4Cr5MoSiV1Ti钢硬度升高。
The expansion curves of 4Cr5MoSiV1Ti new hot work die steel during continuous supercooled austenite cooling at different cooling rates were measured by Gleeble-1500 Dthermal simulation tester.The critical phase transformation points of 4Cr5MoSiV1Ti steel were obtained,and the supercooled austenite continuous cooling transition curve was drawn.The results show that for 4Cr5MoSiV1Ti steel,the final temperature of all eutectoid ferrite dissolving into austenite during heating,the initial temperature of pearlite transforming to austenite during heating,the initial temperature of martensite transformation and the final temperature of martensite transformation were 960,885,370,184℃,respectively.The supercooled austenite underwent transformation of ferrite,bainite and martensite when the cooling rate was lower than 1℃·s-1;when the cooling rate was between 1-10℃·s-1,the supercooled austenite underwent transformation of bainite and martensite;when the cooling rate was higher than 10℃·s-1,the transformation of martensite only took place.The hardness of 4Cr5MoSiV1Ti steel increased with increasing cooling rate.
作者
韩文奎
张彦敏
王要利
宋克兴
张帅帅
HAN Wenkui;ZHANG Yanmin;WANG Yaoli;SONG Kexing;ZHANG Shuaishuai(Henan Key Laboratory of Advanced Non-Ferrous Metals,School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Collaborative Innovation Center of Nonferrous Metals Henan Province,Luoyang 471023,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2020年第S02期93-96,共4页
Materials For Mechanical Engineering
基金
国家重点研发计划项目(2016YFB0300404)
河南省杰出人才创新基金资助项目(182101510003)
河南省创新型科技团队项目(C20150014)
