退火工艺对高锰TWIP钢组织及耐蚀性能的影响

doi:10.13251/j.issn.0254-6051.2024.07.048

金属热处理 ›› 2024, Vol. 49 ›› Issue (7): 313-321.DOI: 10.13251/j.issn.0254-6051.2024.07.048

退火工艺对高锰TWIP钢组织及耐蚀性能的影响

艾根根¹, 姜凤阳¹, 思芳¹, 刘江南¹, 卫娜², 王俊勃¹

1.西安工程大学材料工程学院, 陕西西安 710048;
2.西安超晶科技股份有限公司, 陕西西安 710200

收稿日期:2024-01-22 修回日期:2024-04-25 出版日期:2024-07-25 发布日期:2024-08-29
通讯作者: 姜凤阳,讲师,博士,E-mail:jfy_123@126.com
作者简介:艾根根(1998—),男,硕士研究生,主要研究方向为高熵合金的耐磨损行为,E-mail:940399713@qq.com。
基金资助:
西安市重大科技成果转化及产业化项目(20GXSF0010);国家自然科学基金-青年基金(51901019)

Effect of annealing process on microstructure and corrosion resistance of high-Mn TWIP steel

Ai Gengen¹, Jiang Fengyang¹, Si Fang¹, Liu Jiangnan¹, Wei Na², Wang Junbo¹

1. School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an Shaanxi 710048, China;
2. Xi'an Chaojing Technology Co., Ltd., Xi'an Shaanxi 710200, China

Received:2024-01-22 Revised:2024-04-25 Online:2024-07-25 Published:2024-08-29

摘要/Abstract

摘要： 采用光学显微镜以及配有电子背散射衍射系统的扫描电镜对25.8Mn-3.95Cr-2.83Al-0.33C-0.015N高锰TWIP钢经不同退火温度及时间处理后的微观组织进行观察与分析,并用标准三电极系统的电化学工作站对其耐蚀性能进行检测。结果表明,在600~1000 ℃退火25 min后,试验钢的晶粒随退火温度的升高而变大,Σ3和Σ9晶界的比例均先升高后降低,在800 ℃时达到最大。试验钢的耐全面腐蚀性能随退火温度的升高而提高,在1000 ℃退火时达到最优,而在退火温度为700 ℃时耐局部腐蚀性能最强。在1000 ℃退火5~25 min时,试验钢的晶粒尺寸随退火时间的延长而逐渐增加,低Σ晶界的比例先降低后增加,退火5 min时Σ3和Σ9晶界比例最大,退火25 min时耐蚀性能最佳。

关键词: 高锰TWIP钢, 退火温度, 退火时间, 微观组织, 耐蚀性能

Abstract: Microstructure of 25.8Mn-3.95Cr-2.83Al-0.33C-0.015N high-manganese TWIP steel after annealing at different temperatures and time was observed and analyzed by means of optical microscope and scanning electron microscope equipped with electron backscattering diffraction system, and its corrosion resistance was detected by using electrochemical workstation of standard three-electrode system. The results show that after annealing at 600-1000 ℃ for 25 min, the grains of the tested steel become larger sequentially with the increase of annealing temperature, and the proportion of Σ3 and Σ9 grain boundaries first increases and then decreases, reaching a maximum at 800 ℃. The full-scale corrosion resistance of the tested steel increases with the increase of annealing temperature, reaching an optimum at 1000 ℃, while the strongest localized corrosion resistance is achieved when annealing at 700 ℃. After annealing at 1000 ℃ for 5-25 min, the grain size of the tested steel also gradually augments with the increase of annealing time, the proportion of low-Σ grain boundaries also firstly increases and then decreases, the proportion of Σ3 and Σ9 grain boundary is the largest after annealing for 5 min, and the corrosion resistance is the best after annealing for 25 min.

Key words: high-manganese TWIP steel, annealing temperature, annealing time, microstructure, corrosion resistance

中图分类号:

TG174.2

艾根根, 姜凤阳, 思芳, 刘江南, 卫娜, 王俊勃. 退火工艺对高锰TWIP钢组织及耐蚀性能的影响[J]. 金属热处理, 2024, 49(7): 313-321.

Ai Gengen, Jiang Fengyang, Si Fang, Liu Jiangnan, Wei Na, Wang Junbo. Effect of annealing process on microstructure and corrosion resistance of high-Mn TWIP steel[J]. Heat Treatment of Metals, 2024, 49(7): 313-321.

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退火工艺对高锰TWIP钢组织及耐蚀性能的影响

Effect of annealing process on microstructure and corrosion resistance of high-Mn TWIP steel

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