重庆理工大学学报2024，Vol.38Issue(1)：221-228,8.DOI:10.3969/j.issn.1674-8425(z).2024.01.024
38MnVTi非调质钢的TTT曲线的测定与分析
Determination and analysis of TTT curve of 38MnVTi non-quenched and tempered steel
摘要
Abstract
This paper studies austenite transformation products of 38MnVTi non-quenched and tempered steel during isothermal cooling and the relations between transformation amount and time.The expansion curves of different isothermal temperatures are obtained by Gleeble-1 500D thermal simulation tester.The expansion curves at different isothermal temperatures are acquired by expansion method on Gleeble-1 500D thermal simulation testing machine.The isothermal transformation curve(TTT curve)of 38MnVTi non-quenched and tempered steel is calculated and fitted by Origin software.Our results show the precipitation temperature of cementite is 750 ℃,the ferrite precipitation temperature 840 ℃,the martensite precipitation temperature 360 ℃ and the martensite transformation termination temperature 212 ℃.Under the isothermal cooling conditions of 540,510,480 and 430 ℃,the maximum transformation amounts of bainite are 16.9％,26.8％,38.5％and 55.3％,respectively.关键词
非调质钢/TTT曲线/膨胀法/热模拟Key words
non-quenched and tempered steel/TTT curve/expansion method/thermal simulation分类
矿业与冶金引用本文复制引用
陈浩东,谢丁,陈元芳..38MnVTi非调质钢的TTT曲线的测定与分析[J].重庆理工大学学报,2024,38(1):221-228,8.基金项目
重庆市科委重大项目(cstc2013yykfc6004) （cstc2013yykfc6004）
