含铜304不锈钢的组织纳米化及力学性能

doi:10.13251/j.issn.0254-6051.2025.05.016

金属热处理 ›› 2025, Vol. 50 ›› Issue (5): 101-106.DOI: 10.13251/j.issn.0254-6051.2025.05.016

含铜304不锈钢的组织纳米化及力学性能

赵苗苗¹, 杜林秀², 曹艺¹, 黄妍¹

1.辽宁科技学院冶金与材料工程学院, 辽宁本溪 117004;
2.东北大学轧制技术及连轧自动化国家重点实验室, 辽宁沈阳 110819

收稿日期:2024-11-25 修回日期:2025-03-17 发布日期:2025-06-25
作者简介:赵苗苗(1994—),女,讲师,博士,主要研究方向为不锈钢组织性能调控,E-mail:zhaomml@163.com。
基金资助:
辽宁省教育厅基本科研项目(2024JYTQN-15)

Microstructure nanostructuring and mechanical properties of304 stainless steel containing copper

Zhao Miaomiao¹, Du Linxiu², Cao Yi¹, Huang Yan¹

1. School of Metallurgy and Materials Engineering, Liaoning Institute of Science and Technology, Benxi Liaoning 117004, China;
2. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang Liaoning 110819, China

Received:2024-11-25 Revised:2025-03-17 Published:2025-06-25

摘要/Abstract

摘要： 采用深冷轧制结合等温退火方式对含铜304不锈钢进行组织纳米化,研究了等温退火过程中组织演变规律及其对力学性能的影响。结果表明,深冷轧试验钢在800 ℃分别保温2、3、4和10 min,制备得到的样品平均晶粒尺寸约为315、552、648和1320 nm。800 ℃保温2 min制备得到的纳米/超细晶组织中存在大量弥散分布的纳米级富铜相;保温时间延长到10 min后,组织中还存在较大尺寸的富铬碳化物。与800 ℃保温10 min获得的微米晶结构相比,保温2 min获得的纳米/超细晶奥氏体结构使试验钢具有较高的强度和良好的塑性,屈服强度和抗拉强度分为828 MPa和980 MPa,断裂总延伸率为33.1%。

关键词: 含铜304不锈钢, 富铜相, 晶粒细化, 深冷轧, 退火, 力学性能

Abstract: Microstructure of the 304 stainless steel containing copper was nanocrystallized by cryogenic rolling and isothermal annealing, and the microstructure evolution and its effect on mechanical properties during isothermal annealing were studied. The results indicate that when the cryogenic-rolled experimental steel is annealed at 800 ℃ for 2,3, 4, and 10 min, respectively, the average grain size is 315, 552, 648 and 1320 nm. There are a large number of dispersed nano-size Cu-rich phases in the nano/ultrafine-grained structure prepared by isothermal annealing at 800 ℃ for 2 min, and there are also some larger Cr-rich carbide precipitates with the annealing time extended to 10 min. Compared with the nano-grained structure prepared by annealing at 800 ℃ for 10 min, the nano/ultrafine-grained structure prepared by annealing at 800 ℃ for 2 min imparts the steel with higher strength and better ductility, with yield strength and tensile strength of 828 MPa and 980 MPa, respectively, and total elongation at fracture of 33.1%.

Key words: 304 stainless steel containing copper, Cu-rich phase, grain refinement, cryogenic rolling, annealing, mechanical properties

中图分类号:

TG178

赵苗苗, 杜林秀, 曹艺, 黄妍. 含铜304不锈钢的组织纳米化及力学性能[J]. 金属热处理, 2025, 50(5): 101-106.

Zhao Miaomiao, Du Linxiu, Cao Yi, Huang Yan. Microstructure nanostructuring and mechanical properties of304 stainless steel containing copper[J]. Heat Treatment of Metals, 2025, 50(5): 101-106.

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含铜304不锈钢的组织纳米化及力学性能

Microstructure nanostructuring and mechanical properties of304 stainless steel containing copper

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