退火工艺对Fe-30Mn-10Al-1C低密度钢组织与性能的影响

doi:10.13251/j.issn.0254-6051.2024.02.014

金属热处理 ›› 2024, Vol. 49 ›› Issue (2): 91-97.DOI: 10.13251/j.issn.0254-6051.2024.02.014

退火工艺对Fe-30Mn-10Al-1C低密度钢组织与性能的影响

胡启文¹, 李天怡^2,3, 耿笑笑¹, 成卓¹, 刘文月^2,3, 吴桂林¹

1.北京科技大学碳中和研究院, 北京 100083;
2.海洋装备用金属材料及其应用国家重点实验室, 辽宁鞍山 114009;
3.鞍钢集团北京研究院有限公司, 北京 102200

收稿日期:2023-08-30 修回日期:2024-01-06 出版日期:2024-03-27 发布日期:2024-03-27
通讯作者: 吴桂林,研究员,博士,E-mail:guilinwu@ustb.edu.cn
作者简介:胡启文(1998—),男,硕士研究生,主要研究方向为低密度钢的组织与力学性能,E-mail:1459439149@qq.com。
基金资助:
国家科学自然基金(52071038)

Effect of annealing process on microstructure and properties of Fe-30Mn-10Al-1C low density steel

Hu Qiwen¹, Li Tianyi^2,3, Geng Xiaoxiao¹, Cheng Zhuo¹, Liu Wenyue^2,3, Wu Guilin¹

1. Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing 100083, China;
2. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan Liaoning 114009, China;
3. Ansteel Beijing Research Institute Co., Ltd., Beijing 102200, China

Received:2023-08-30 Revised:2024-01-06 Online:2024-03-27 Published:2024-03-27

摘要/Abstract

摘要： 针对Fe-30Mn-10Al-1C低密度钢,系统研究了不同退火工艺对其组织及力学性能的影响,分析了该材料的韧性转变机制。结果表明,Fe-30Mn-10Al-1C在800 ℃退火析出κ碳化物和铁素体,抗拉强度>1100 MPa,但-40 ℃冲击性能较差;850 ℃退火后κ碳化物消失,试验钢的强塑积提升,韧性增加;900 ℃退火得到奥氏体单相组织,获得良好的强塑性和强韧性匹配。Fe-30Mn-10Al-1C钢的韧性与κ碳化物、铁素体和奥氏体晶粒尺寸有关,并且与奥氏体晶粒尺寸存在反尺寸关系。

关键词: 低密度钢, 退火, 强塑积, 冲击性能, 滑移带, 反尺寸关系

Abstract: Effect of different annealing processes on microstructure and mechanical properties of the Fe-30Mn-10Al-1C low density steel was systematically studied, and the ductile-to-brittle transition mechanism of the material was analyzed. The results show that κ carbides and ferrite are precipitated in the tested steel annealed at 800 ℃, of which the tensile strength is higher than 1100 MPa, while the impact property at -40 ℃ is poor. κ carbides disappear after annealing at 850 ℃, the product of strength and elongation of the tested steel are increased, and the toughness is improved. Austenitic single-phase structure is obtained after annealing at 900 ℃, obtaining a good match of strength-plasticity and strength-toughness. The toughness of the Fe-30Mn-10Al-1C steel is related to the formation of κ carbide and ferrite in the austenite matrix as well as the grain size of austenite, and there is an inverse size relationship between the toughness and the grain size of austenite.

Key words: low density steel, annealing, product of strength and elongation, impact property, slipping band, inverse size relationship

中图分类号:

TG142.1

胡启文, 李天怡, 耿笑笑, 成卓, 刘文月, 吴桂林. 退火工艺对Fe-30Mn-10Al-1C低密度钢组织与性能的影响[J]. 金属热处理, 2024, 49(2): 91-97.

Hu Qiwen, Li Tianyi, Geng Xiaoxiao, Cheng Zhuo, Liu Wenyue, Wu Guilin. Effect of annealing process on microstructure and properties of Fe-30Mn-10Al-1C low density steel[J]. Heat Treatment of Metals, 2024, 49(2): 91-97.

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退火工艺对Fe-30Mn-10Al-1C低密度钢组织与性能的影响

Effect of annealing process on microstructure and properties of Fe-30Mn-10Al-1C low density steel

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