冷却速率对非调质钢高温性能的影响

doi:10.13251/j.issn.0254-6051.2025.12.021

金属热处理 ›› 2025, Vol. 50 ›› Issue (12): 139-144.DOI: 10.13251/j.issn.0254-6051.2025.12.021

冷却速率对非调质钢高温性能的影响

王超¹, 邹雷雷², 李明³, 陈军⁴

1.北京科技大学绿色低碳钢铁冶金全国重点实验室, 北京 100083;
2.首钢京唐钢铁联合有限责任公司炼钢部, 河北唐山 063210;
3.南京钢铁股份有限公司研究院, 江苏南京 211500;
4.湖南华菱湘潭钢铁集团有限公司技术中心, 湖南湘潭 411100

收稿日期:2025-07-15 修回日期:2025-10-24 发布日期:2026-01-06
通讯作者: 邹雷雷,工程师,博士, E-mail:zoulei153@163.com
作者简介:王超(1984—),男,工程师,博士,主要研究方向为金属凝固理论,E-mail:wangchao@ustb.edu.cn。

Effect of cooling rate on high-temperature properties of non-quenched and tempered steel

Wang Chao¹, Zou Leilei², Li Ming³, Chen Jun⁴

1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
2. Steelmaking Division, Shougang Jingtang Iron and Steel Co., Ltd., Tangshan Hebei 063210, China;
3. Research Institute of Nanjing Iron & Steel Co., Ltd., Nanjing Jiangsu 211500, China;
4. Technical Center, Hunan Valin Xiangtan Iron & Steel Group Co., Ltd., Xiangtan Hunan 411100, China

Received:2025-07-15 Revised:2025-10-24 Published:2026-01-06

摘要/Abstract

摘要： 为探究冷却速率对非调质钢高温性能的影响,运用Gleeble-1500高温拉伸试验机研究了不同冷却速率(0.1~3.0 ℃/s)以及复合冷却模式对其高温力学性能的影响,并且采用热膨胀仪研究了冷却速率对非调质钢固态相变行为的影响。结果表明:采用“先强后弱”冷却模式(3.0 ℃/s+0.5 ℃/s)较强冷(3.0 ℃/s)模式,钢的热塑性整体得到提升,甚至无明显塑性凹槽;而采用“先弱后强”冷却模式(0.5 ℃/s+3.0 ℃/s)较单一弱冷(0.5 ℃/s)模式在奥氏体区钢的热塑性略有降低。冷却速率增大后,奥氏体转变的热膨胀速率由0.1 ℃/s时的0.8×10^-5 s^-1增大至1.0 ℃/s时的4.6×10^-5 s^-1,而线性膨胀系数α_line峰值从5.70×10^-5℃^-1降低至3.25×10^-5℃^-1。

关键词: 冷却速率, 非调质钢, 高温性能, 固态相变, 热塑性

Abstract: To investigate the effect of cooling rate on the high-temperature properties of non-quenched and tempered steel, the effects of different cooling rates (0.1-3.0 ℃/s) and composite cooling modes on the high-temperature mechanical properties of the tested steel were investigated using Gleeble-1500 high-temperature tensile tests. The effect of cooling rate on the solid phase transformation behavior of the non-quenched and tempered steel was also investigated using a thermal expansion instrument. The results show that using the "strong before weak" cooling mode (3.0 ℃/s+0.5 ℃/s) compared to the strong cooling (3.0 ℃/s) mode, the overall hot ductility of the steel is improved, and there is even no obvious plastic groove. The use of the "weak before strong" cooling (0.5 ℃/s+3.0 ℃/s) mode slightly reduces the hot ductility at austenitic zone compared to the single weak cooling (0.5 ℃/s) mode. Increasing the cooling rate, the thermal expansion rate of austenite transformation is increased from 0.8×10^-5 s^-1 at 0.1 ℃/s to 4.6×10^-5 s^-1 at 1.0 ℃/s, while the peak linear expansion coefficient α_line is decreased from 5.70×10^-5℃^-1 to 3.25×10^-5℃^-1.

Key words: cooling rate, non-quenched and tempered steel, high-temperature properties, solid phase transformation, hot ductility

中图分类号:

TF762

王超, 邹雷雷, 李明, 陈军. 冷却速率对非调质钢高温性能的影响[J]. 金属热处理, 2025, 50(12): 139-144.

Wang Chao, Zou Leilei, Li Ming, Chen Jun. Effect of cooling rate on high-temperature properties of non-quenched and tempered steel[J]. Heat Treatment of Metals, 2025, 50(12): 139-144.

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冷却速率对非调质钢高温性能的影响

Effect of cooling rate on high-temperature properties of non-quenched and tempered steel

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