空冷对中低碳富Si/Al微合金钢组织与性能的影响

doi:10.13251/j.issn.0254-6051.2025.06.028

金属热处理 ›› 2025, Vol. 50 ›› Issue (6): 182-187.DOI: 10.13251/j.issn.0254-6051.2025.06.028

空冷对中低碳富Si/Al微合金钢组织与性能的影响

朱丽华¹, 冯文静², 胡滨¹, 胡世浩³, 席净¹, 王守明², 崔利民², 赵雷杰³

1.河南省锅炉压力容器检验技术科学研究院, 河南郑州 450016;
2.中航上大高温合金材料股份有限公司河北省高温合金再生技术重点实验室, 河北邢台 054800;
3.河北工程大学机械与装备工程学院, 河北邯郸 056038

收稿日期:2025-01-07 修回日期:2025-04-13 出版日期:2025-06-25 发布日期:2025-07-08
通讯作者: 冯文静,工程师,学士, E-mail: 15100998936@126.com
作者简介:朱丽华(1978—),女,高级工程师,主要研究方向为承压类特种设备检验检测及相关技术研究,E-mail: 45769968@qq.com。
基金资助:
中航上大高温合金材料股份有限公司院士合作重点单位项目;河南省基本科研业务费支持项目(2023KY12);河北省创新能力提升计划——中航上大高温合金材料股份有限公司特种合金产业创新创业团队(235A1001D);河北省军民融合科技创新项目(SJMYF202409)

Effect of air cooling on microstructure and properties of medium and low carbon Si/Al-rich microalloyed steels

Zhu Lihua¹, Feng Wenjing², Hu Bin¹, Hu Shihao³, Xi Jing¹, Wang Shouming², Cui Limin², Zhao Leijie³

1. Henan Boiler and Pressure Vessel Inspection Technology Research Institute, Zhengzhou Henan 450016, China;
2. Key Laboratory of Hebei Province on High Temperature Alloy Regeneration Technology, Zhonghangshangda Superalloys Co., Ltd., Xingtai Hebei 054800, China;
3. School of Mechanical and Equipment Engineering, Hebei University of Engineering, Handan Hebei 056038, China

Received:2025-01-07 Revised:2025-04-13 Online:2025-06-25 Published:2025-07-08

摘要/Abstract

摘要： 利用金相显微镜(OM)、扫描电镜(SEM)以及X射线衍射仪(XRD)表征了中低碳(0.22%C, 0.34%C)富Si/Al微合金钢空冷热处理条件下的微观组织,并用拉伸试验机、冲击试验机对其力学性能进行研究。结果表明,两种试验钢经空冷热处理都能得到含贝氏体、马氏体以及少量残留奥氏体的复相组织,展现出优异的力学性能。0.22%C钢微观组织中含有少量粒状贝氏体、板条状贝氏体、马氏体以及少量残留奥氏体,该组织表现出较高的强度与良好的塑韧性匹配,抗拉强度为1581 MPa,断后伸长率为17.6％,强塑积高达26.7 GPa·%,冲击吸收能量为61.0 J。与之相比,0.34%C钢中不含粒状贝氏体,板条状贝氏体数量显著减少,马氏体与残留奥氏体数量占比明显增加,具有更高的抗拉强度(1929 MPa),但是断后伸长率(13.9％)与冲击吸收能量(43.5 J)明显下降,强塑积也降低至25.6 GPa·%。

关键词: 富Si/Al钢, 空冷, 复相组织, 力学性能

Abstract: Microstructure of two Si/Al-rich microalloyed steels with 0.22%C and 0.34%C subjected to air-cooling was investigated using metallographic microscope (OM), scanning electron microscope (SEM), and X-ray diffraction (XRD), while their mechanical properties were analyzed through tensile and impact tester. The results indicate that both the tested steels can obtain a multiphase microstructure consisting of bainite, martensite, and a small amount of retained austenite after air cooling treatment, demonstrating excellent mechanical properties. The microstructure of the 0.22%C steel contains a small amount of granular bainite, lath bainite, martensite and a small amount of retained austenite, which shows good matching between relatively high strength with good plasticity and toughness, with the tensile strength of 1581 MPa, elongtion of 17.6%, and thus the product of tensile strength and elongation is up to 26.7 GPa·%, even the impact absorbed energy reaching 61.0 J. In contrast, the 0.34%C steel doesn't contain granular bainite, but contains much less lath bainite and much higher volume fractions of martensite and retained austenite. Consequently, the 0.34%C steel demonstrates enhanced tensile strength of 1929 MPa, but both the elongtion(13.9%) and impact absorbed energy (43.5 J) are reduced, and the product of strength and elongation is decreased to 25.6 GPa·%.

Key words: Si/Al-rich steel, air cooling, multiphasic microstructure, mechanical properties

中图分类号:

TG142.3

朱丽华, 冯文静, 胡滨, 胡世浩, 席净, 王守明, 崔利民, 赵雷杰. 空冷对中低碳富Si/Al微合金钢组织与性能的影响[J]. 金属热处理, 2025, 50(6): 182-187.

Zhu Lihua, Feng Wenjing, Hu Bin, Hu Shihao, Xi Jing, Wang Shouming, Cui Limin, Zhao Leijie. Effect of air cooling on microstructure and properties of medium and low carbon Si/Al-rich microalloyed steels[J]. Heat Treatment of Metals, 2025, 50(6): 182-187.

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空冷对中低碳富Si/Al微合金钢组织与性能的影响

Effect of air cooling on microstructure and properties of medium and low carbon Si/Al-rich microalloyed steels

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