摘要
采用Gleble-1500热模拟机测定了15MnVB钢在0.05～20℃/s冷速下连续冷却转变的膨胀曲线,结合光学显微镜的微观组织观察,测绘了该钢热变形奥氏体连续冷却转变过程中的动态CCT曲线;研究了其连续冷却转变产物的组织形态和硬度。实验结果表明,15MnVB钢在0.05-20℃/s冷却速率下的组织主要由铁素体+珠光体、铁素体+珠光体+贝氏体、铁素体+珠光体+贝氏体+马氏体、贝氏体+马氏体组成。
By measuring the dilatometric curves of 15 MnVB steel with cooling speed 0.05 ~20℃/s on Gleeble-1500 thermo-mechanical simulator, and combining with metallographic analysis, a CCT diagram of hot deformed austenite in continuous cooling transformation was obtained, and the products microstructure and hardness of the continuous cooling transformation occurring in steel 15 MnVB was investigated.The results show that the microstructure of the steel consists of ferrite+ pearlite, ferrite + pearlite + bainite, ferrite + pearlite + bainite + martensite and bainite + martensite at the cooling rate from 0.05℃/s to 20 ℃/s.
作者
李世琳
阮士朋
王利军
王宁涛
Li Shilin;Ruan Shipeng;Wang Lijun;Wang Ningtao(Technology Center, Xingtai Iron and Steel Corp Ltd,Xingtai 054027;Hebei Province Engineering and Technology Research Center for Wire Rod, Xinglai 054027)
出处
《特殊钢》
北大核心
2019年第3期5-7,共3页
Special Steel
关键词
15MnVB钢
铸坯
热模拟
CCT曲线
15MnVB Steel
Casting Billet
Thermal Mechanical Simulation
CCT Curves
