EH47止裂钢奥氏体连续冷却转变行为

特殊钢 ›› 2020, Vol. 41 ›› Issue (4): 68-70.

EH47止裂钢奥氏体连续冷却转变行为

刘朝霞, 刘俊, 徐光琴, 宁康康, 许晓红

江阴兴澄特种钢铁有限公司研究院，江阴214400

收稿日期:2020-04-05 出版日期:2020-08-01 发布日期:2022-04-28
作者简介:刘朝霞（1979-）,女,博士（2007年中国科学院金属研究所），高级工程师,2001年吉林大学（本科）毕业，板材产品研发。

Continuous Cooling Transformation Behavior of Austenite in EH47 Crack-Resistant Steel

Liu Zhaoxia, Liu Jun, Xu Guangqing, Ning Kangkang , Xu Xiaohong

Research Institute, Jiangyin Xingcheng Special Steel Works Co Ltd, Jiangying 214400

Received:2020-04-05 Published:2020-08-01 Online:2022-04-28

摘要/Abstract

摘要： 采用Gleeble-3800热模拟实验机测定了Nb-Ti-V微合金化0.04～0.08C-0.6～1.2Ni-0.1～0.5Cr-0.1～0.5Cu大型集装箱船用EH47止裂钢在0.05～50℃/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,得出了该钢奥氏体连续冷却转变过程中的CCT曲线;研究了EH47止裂钢连续冷却转变产物的组织形态和显微硬度。结果表明,EH47止裂钢在0.05～50℃/s冷却速率下的组织主要由铁素体+珠光体、针状铁素体+贝氏体组成,即使冷却速度达到了50℃/s,组织中仍然未见马氏体出现。

Abstract: By measuring the dilatometric curves of Nb-Ti-V micro-alloying 0.04 ~ 0.08C-0. 6 ~ 1.2Ni-0.1 ~ 0. 5Cr- 0.1 ~0.5Cu crack-resistant steel EH47 for large container ship with cooling rate of 0. 05 ~50 ℃/s on a Gleeble-3800 thermomechanical simulator, and combining with metallographic analysis, a CCT diagram of austenite continuous cooling transformation is obtained. And the microstructure and hardness of the continuous cooling transformation occurring in EH47 crack-resistant steel are investigated. The results show that the microstructure of EH47 crack-resistant steel at 0. 05 〜 50 ℃/s cooling rate consists of ferrite + pearlite and accicular ferrite + bainite. Even the cooling rate as high as 50℃/s, no martensite occurs in the microstructure.

刘朝霞, 刘俊, 徐光琴, 宁康康, 许晓红. EH47止裂钢奥氏体连续冷却转变行为[J]. 特殊钢, 2020, 41(4): 68-70.

Liu Zhaoxia, Liu Jun, Xu Guangqing, Ning Kangkang , Xu Xiaohong. Continuous Cooling Transformation Behavior of Austenite in EH47 Crack-Resistant Steel[J]. Special Steel, 2020, 41(4): 68-70.