轧制参数对共析珠光体钢轨奥氏体再结晶行为的影响

冯海玻; 李少华; 王轲霄; 高军恒; 汪水泽; 赵海涛; 韩振宇; 邓勇; 黄禹赫; 毛新平

doi:10.1007/s12613-023-2805-4

Volume 31 Issue 5

May 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(5): 833-841

Haibo Feng, Shaohua Li, Kexiao Wang, Junheng Gao, Shuize Wang, Haitao Zhao, Zhenyu Han, Yong Deng, Yuhe Huang, and Xinping Mao, Effect of deformation parameters on the austenite dynamic recrystallization behavior of a eutectoid pearlite rail steel, Int. J. Miner. Metall. Mater., 31(2024), No. 5, pp. 833-841. https://doi.org/10.1007/s12613-023-2805-4

Cite this article as:

Haibo Feng, Shaohua Li, Kexiao Wang, Junheng Gao, Shuize Wang, Haitao Zhao, Zhenyu Han, Yong Deng, Yuhe Huang, and Xinping Mao, Effect of deformation parameters on the austenite dynamic recrystallization behavior of a eutectoid pearlite rail steel, Int. J. Miner. Metall. Mater., 31(2024), No. 5, pp. 833-841. https://doi.org/10.1007/s12613-023-2805-4

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研究论文

轧制参数对共析珠光体钢轨奥氏体再结晶行为的影响

1)
北京科技大学碳中和研究院, 北京 100083, 中国
2)
辽宁材料实验室钢铁再生技术研究所, 沈阳 110004, 中国
3)
攀钢集团攀枝花钢铁研究院有限公司, 攀枝花 617000, 中国

通讯作者:
高军恒    E-mail: Junhenggao@ustb.edu.cn

汪水泽    E-mail: wangshuize@ustb.edu.cn

毛新平    E-mail: maoxinping@126.com

文章亮点

(1) 系统地研究了压下量及轧制温度对共析珠光体轨道钢奥氏体再结晶行为的影响规律。

(2) 总结并分析了前序道次累积应变对后续轧制过程的影响。

(3) 总结并提出了在未完全再结晶及再结晶条件下，应变分配分别对奥氏体再结晶行为的影响规律。

中文摘要

铁路向高速、重载的发展方向对轨道钢强韧性提出了更高的要求。而通过调控轧制工艺，细化奥氏体晶粒被认为是可以同时提高轨道钢的强度和韧性的有效途径。本文通过热模拟试验机，研究了应变速率恒定时，不同轧制压下量及轧制温度对奥氏体再结晶行为的影响，并分析了不同条件下，应变分配对奥氏体晶粒尺寸的影响规律。结果表明，单道次热轧过程中，奥氏体再结晶程度及再结晶晶粒尺寸随轧制温度的增加而增加，这使得平均奥氏体晶粒尺寸随轧制温度的增加呈现先减小后增加的趋势。三道次热轧过程中，在未完全再结晶条件下，部分变形量移至终轧道次有助于提高再结晶程度，促进晶粒细化；而在完全再结晶条件下，平均奥氏体晶粒尺寸仅随终轧道次轧制温度的降低而降低。并提出在保证完全再结晶的条件下，将部分低温区域压下量移至高温区域进行，有助于降低轧机负载且对最终晶粒细化没有明显影响。

关键词:

Research Article

Effect of deformation parameters on the austenite dynamic recrystallization behavior of a eutectoid pearlite rail steel

+ Author Affiliations

1)
Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, China
2)
Institute for Steel Sustainable Technology, Liaoning Academy of Materials, Shenyang 110004, China
3)
Pangang Group Panzhihua Iron and Steel Research Institute Co. Ltd., Panzhihua 617000, China

Xinping Mao is an advisory board member for this journal and was not involved in the editorial review or the decision to publish this article. The authors have no conflict of interest to declare.
The online version contains supplementary material available at https://doi.org/10.1007/s12613-023-2805-4

Corresponding authors:
Junheng Gao    E-mail: Junhenggao@ustb.edu.cn

Shuize Wang    E-mail: wangshuize@ustb.edu.cn

Xinping Mao    E-mail: maoxinping@126.com
Received: 3 August 2023; Revised: 3 December 2023; Accepted: 5 December 2023; Available online: 8 December 2023

Abstract

Abstract

Understandings of the effect of hot deformation parameters close to the practical production line on grain refinement are crucial for enhancing both the strength and toughness of future rail steels. In this work, the austenite dynamic recrystallization (DRX) behaviors of a eutectoid pearlite rail steel were studied using a thermo-mechanical simulator with hot deformation parameters frequently employed in rail production lines. The single-pass hot deformation results reveal that the prior austenite grain sizes (PAGSs) for samples with different deformation reductions decrease initially with an increase in deformation temperature. However, once the deformation temperature is beyond a certain threshold, the PAGSs start to increase. It can be attributed to the rise in DRX volume fraction and the increase of DRX grain with deformation temperature, respectively. Three-pass hot deformation results show that the accumulated strain generated in the first and second deformation passes can increase the extent of DRX. In the case of complete DRX, PAGS is predominantly determined by the deformation temperature of the final pass. It suggests a strategic approach during industrial production where part of the deformation reduction in low temperature range can be shifted to the medium temperature range to release rolling mill loads.
- eutectoid pearlite rail steel;
- prior austenite grain size;
- dynamic recrystallization;
- single-pass hot deformation;
- three-pass hot deformation

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轧制参数对共析珠光体钢轨奥氏体再结晶行为的影响

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中文摘要

Effect of deformation parameters on the austenite dynamic recrystallization behavior of a eutectoid pearlite rail steel

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