Continuous Cooling Transformation Behavior of Hot Deformation Austenite in 15MnVB Steel 160 mm x 160 mm Casting Billet

Special Steel ›› 2019, Vol. 40 ›› Issue (3): 5-7.

Continuous Cooling Transformation Behavior of Hot Deformation Austenite in 15MnVB Steel 160 mm x 160 mm Casting Billet

Li Shilin ^1,2, Ruan Shipeng^1,2, Wang Lijun^1,2 ， Wang Ningtao^1,2

1 Technology Center,Xingtai Iron and Steel Corp Ltd,Xingtai 054027 ；
2 Hebei Province Engineering and Technology Research Center for Wire Rod, Xingtai 054027

Received:2018-11-18 Online:2019-06-01 Published:2022-05-16

15MnVB钢160 mm xl60 mm铸坯热变形奥氏体连续冷却转变行为

李世琳^1,2，阮士朋^1,2，王利军^1,2，王宁涛^1,2

1邢台钢铁有限责任公司技术中心，邢台054027 ；
2河北省线材工程技术研究中心，邢台054027

作者简介:李世琳(1982.)，女，硕士(2008年四川大学)，高级工程师, 2005年河北工业大学(本科)毕业，线材产品研发。

Abstract

Abstract: By measuring the dilatometric curves of 15MnVB 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 15MnVB 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.

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。

关键词: 15MnVB钢, 铸坯, 热模拟, CCT曲线

Li Shilin , Ruan Shipeng , Wang Lijun , Wang Ningtao, . Continuous Cooling Transformation Behavior of Hot Deformation Austenite in 15MnVB Steel 160 mm x 160 mm Casting Billet[J]. Special Steel, 2019, 40(3): 5-7.

李世琳, 阮士朋, 王利军, 王宁涛, . 15MnVB钢160 mm xl60 mm铸坯热变形奥氏体连续冷却转变行为[J]. 特殊钢, 2019, 40(3): 5-7.