390 MPa级抗碰撞船体钢的奥氏体连续冷却转变

doi:10.13251/j.issn.0254-6051.2024.07.022

金属热处理 ›› 2024, Vol. 49 ›› Issue (7): 146-151.DOI: 10.13251/j.issn.0254-6051.2024.07.022

390 MPa级抗碰撞船体钢的奥氏体连续冷却转变

陈作宁^1,2, 师仲然², 胡骞¹, 展之德^2,3, 罗小兵²

1.武汉科技大学省部共建耐火材料与冶金国家重点实验室, 湖北武汉 430081;
2.钢铁研究总院有限公司工程用钢研究院, 北京 100081;
3.上海应用技术大学材料与科学工程学院, 上海 201418

收稿日期:2024-01-22 修回日期:2024-04-29 出版日期:2024-07-25 发布日期:2024-08-29
作者简介:陈作宁(1998—),男,硕士研究生,主要研究方向为高性能船体结构钢,E-mail:946736752@qq.com

Continuous cooling transformation of austenite in 390 MPa grade anti-collision hull steel

Chen Zuoning^1,2, Shi Zhongran², Hu Qian¹, Zhan Zhide^2,3, Luo Xiaobing²

1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;
2. Research Institute of Structural Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China;
3. School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China

Received:2024-01-22 Revised:2024-04-29 Online:2024-07-25 Published:2024-08-29

摘要/Abstract

摘要： 采用Gleeble-3800热模拟试验机研究了390 MPa级抗碰撞船体钢动态和静态条件下过冷奥氏体连续冷却转变行为,通过测定不同冷速下连续冷却过程的膨胀曲线,结合金相-硬度法绘制试验钢的动态和静态CCT曲线。结果表明:与静态条件相比,动态条件下试验钢的铁素体和珠光体转变的冷速区间由0.1~20 ℃/s缩小至0.1~10 ℃/s,贝氏体转变的冷速区间由0.5~40 ℃/s扩大至0.1~40 ℃/s,马氏体转变的冷速区间由40 ℃/s扩大至10~40 ℃/s。动态CCT曲线较静态CCT曲线整体向左上方移动,即扩大了铁素体和珠光体相变区间,并且缩小了贝氏体和马氏体相变区间。

关键词: 抗碰撞钢, 动静态CCT曲线, 显微组织, 硬度, 冷却速度

Abstract: Continuous cooling transformation behavior of 390 MPa grade anti-collision hull steel under dynamic and static conditions was studied by using Gleeble-3800 thermal simulation testing machine. The dynamic and static CCT curves of the tested steel were drawn by measuring the expansion curves of continuous cooling process at different cooling rates and combining with metallographic-hardness method. The results show that compared with the static condition, the cooling rate range of ferrite and pearlite transformation of the tested steel under dynamic condition is reduced from 0.1-20 ℃/s to 0.1-10 ℃/s, the cooling rate range of bainite transformation is expanded from 0.5-40 ℃/s to 0.1-40 ℃/s, and the cooling rate range of martensite transformation is expanded from 40 ℃/s to 10-40 ℃/s. The dynamic CCT curves moves to the upper left compared with the static CCT curves, indicating that the ferrite and pearlite phase transformation region enlarged and the bainite and martensite phase transformation region reduced.

Key words: anti-collision steel, dynamic and static CCT curves, microstructure, hardness, cooling rate

中图分类号:

TG146.2⁺2

陈作宁, 师仲然, 胡骞, 展之德, 罗小兵. 390 MPa级抗碰撞船体钢的奥氏体连续冷却转变[J]. 金属热处理, 2024, 49(7): 146-151.

Chen Zuoning, Shi Zhongran, Hu Qian, Zhan Zhide, Luo Xiaobing. Continuous cooling transformation of austenite in 390 MPa grade anti-collision hull steel[J]. Heat Treatment of Metals, 2024, 49(7): 146-151.

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390 MPa级抗碰撞船体钢的奥氏体连续冷却转变

Continuous cooling transformation of austenite in 390 MPa grade anti-collision hull steel

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