基于膨胀曲线一阶导数法确定抗震螺纹钢的连续冷却转变行为

doi:10.13251/j.issn.0254-6051.2025.11.002

金属热处理 ›› 2025, Vol. 50 ›› Issue (11): 7-15.DOI: 10.13251/j.issn.0254-6051.2025.11.002

基于膨胀曲线一阶导数法确定抗震螺纹钢的连续冷却转变行为

孙钊洋¹, 骆艳萍², 张云祥¹, 叶传龙¹, 胡俊锋¹, 李杨齐²

1.武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室, 湖北武汉 430081;
2.中冶南方工程技术有限公司, 湖北武汉 430223

收稿日期:2025-06-08 修回日期:2025-09-11 发布日期:2025-12-16
通讯作者: 张云祥,副教授,博士,E-mail:zhangyunxiang@wust.edu.cn
作者简介:孙钊洋(1998—),男,硕士,主要研究方向为金属材料组织与性能控制,E-mail:sunzhaoyang@wust.edu.cn。
基金资助:
国家自然科学基金(51874216)

Continuous cooling transformation behavior of anti-seismic rebar based on first derivative method of dilatometric curve

Sun Zhaoyang¹, Luo Yanping², Zhang Yunxiang¹, Ye Chuanlong¹, Hu Junfeng¹, Li Yangqi²

1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;
2. WISDRI Engineering &Research Incorporation Limited, Wuhan Hubei 430223, China

Received:2025-06-08 Revised:2025-09-11 Published:2025-12-16

摘要/Abstract

摘要： 利用热模拟试验机Gleeble-3500对抗震螺纹钢HRB400E进行静、动态的连续冷却转变(CCT)行为研究,结合OM、SEM图像,利用不同冷速下膨胀量曲线的一阶导数,确定了各组织的相变开始温度和结束温度,绘制了试验钢的静态和动态CCT曲线。结果表明,HRB400E钢的临界温度Ac₃为859 ℃、Ac₁为722 ℃。静态CCT试验中,魏氏铁素体转变冷速区间为3~10 ℃/s,贝氏体转变冷速区间为3~15 ℃/s,马氏体转变冷速区间为10~30 ℃/s。动态CCT试验中,魏氏铁素体转变冷速区间为1~5 ℃/s,贝氏体转变冷速区间为2~15 ℃/s,马氏体转变冷速区间为7~30 ℃/s。相比静态CCT曲线,动态CCT曲线整体向左上方移动,表明变形促进了贝氏体转变。

关键词: 抗震螺纹钢, 连续冷却转变(CCT), 一阶导数法

Abstract: Static and dynamic continuous cooling transformation (CCT) behavior of anti-seismic rebar HRB400E was studied by using Gleeble-3500 thermal simulation experimental machine. Combined with OM and SEM images, the first derivative of dilatometric curve at different cooling rates was used to determine the starting and ending temperatures of phase transformation, and the static and dynamic CCT curves of the tested steel were plotted. The results show that the critical temperatures for HRB400E steel are Ac₃ of 859 ℃ and Ac₁ of 722 ℃. In the static CCT test, the cooling rate range for Widmanstätten ferrite transformation is 3-10 ℃/s, that for bainite transformation is 3-15 ℃/s, and the cooling rate range for martensite transformation is 10-30 ℃/s. In the dynamic CCT test, the cooling rate range for Widmanstätten ferrite transformation is 1-5 ℃/s, that for bainite transformation is 2-15 ℃/s, and that for martensite transformation is 7-30 ℃/s. Compared with the static CCT curve, the dynamic CCT curve shifts as a whole to the upper left, which indicates that the deformation promotes bainite transformation.

Key words: anti-seismic rebar, continuous cooling transformation (CCT), first derivative method

中图分类号:

TG142.1⁺5

孙钊洋, 骆艳萍, 张云祥, 叶传龙, 胡俊锋, 李杨齐. 基于膨胀曲线一阶导数法确定抗震螺纹钢的连续冷却转变行为[J]. 金属热处理, 2025, 50(11): 7-15.

Sun Zhaoyang, Luo Yanping, Zhang Yunxiang, Ye Chuanlong, Hu Junfeng, Li Yangqi. Continuous cooling transformation behavior of anti-seismic rebar based on first derivative method of dilatometric curve[J]. Heat Treatment of Metals, 2025, 50(11): 7-15.

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基于膨胀曲线一阶导数法确定抗震螺纹钢的连续冷却转变行为

Continuous cooling transformation behavior of anti-seismic rebar based on first derivative method of dilatometric curve

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