高温时效对P91钢组织及硬度的影响

doi:10.13251/j.issn.0254-6051.2022.12.002

金属热处理 ›› 2022, Vol. 47 ›› Issue (12): 7-12.DOI: 10.13251/j.issn.0254-6051.2022.12.002

高温时效对P91钢组织及硬度的影响

张开¹, 王学¹, 倪满生², 刘俊建², 杜成超³

1.武汉大学动力与机械学院, 湖北武汉 430072;
2.大唐华东电力试验研究院, 安徽合肥 230088;
3.江苏大学材料科学与工程学院, 江苏镇江 212013

收稿日期:2022-07-13 修回日期:2022-10-17 出版日期:2022-12-25 发布日期:2023-01-05
通讯作者: 王学,教授,博士,E-mail:wangxue2011@whu.edu.cn
作者简介:张开(1996—),男,硕士研究生,主要研究方向为耐热钢组织与性能,E-mail:zk6359129@163.com。
基金资助:
国家自然科学基金(52174370)

Effect of high temperature aging on microstructure and hardness of P91 steel

Zhang Kai¹, Wang Xue¹, Ni Mansheng², Liu Junjian², Du Chengchao³

1. School of Power and Machinery, Wuhan University, Wuhan Hubei 430072, China;
2. Da Tang East China Electric Power Test & Research Institute, Hefei Anhui 230088, China;
3. School of Materials Science & Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China

Received:2022-07-13 Revised:2022-10-17 Online:2022-12-25 Published:2023-01-05

摘要/Abstract

摘要： 对P91钢进行了650 ℃×2935 h的时效试验,测试了时效过程中的硬度变化,并分析了显微组织变化对硬度的影响。结果表明,在时效前期,由于M₂₃C₆的析出,导致硬度略有上升。在后续的时效中,M₂₃C₆发生熟化,数量密度降低;同时,亚晶缓慢长大,位错密度略微降低,使P91钢的硬度缓慢下降。根据时效过程中的组织和硬度变化,可以预测P91钢在不超过600 ℃的条件下服役时,有较好的组织和性能稳定性。

关键词: P91钢, 高温时效, 显微组织, 硬度

Abstract: P91 steel was aged at 650 ℃ for 2935 h. The hardness change during aging was measured, and the influence of microstructure change on hardness was analyzed. The results show that in the early aging period, the hardness increases slightly due to the precipitation of M₂₃C₆. During the subsequent aging, M₂₃C₆ is matured and its quantity density decreases, at the same time, the hardness of the P91 steel decreases slowly due to the slow growth of sub crystal and slight decrease of dislocation density. According to the changes of microstructure and hardness during the aging process, it can be predicted that the P91 steel has better stability of microstructure and properties when it is in service at the temperature not exceeding 600 ℃.

Key words: P91 steel, high temperature aging, microstructure, hardness

中图分类号:

TG142.1

张开, 王学, 倪满生, 刘俊建, 杜成超. 高温时效对P91钢组织及硬度的影响[J]. 金属热处理, 2022, 47(12): 7-12.

Zhang Kai, Wang Xue, Ni Mansheng, Liu Junjian, Du Chengchao. Effect of high temperature aging on microstructure and hardness of P91 steel[J]. Heat Treatment of Metals, 2022, 47(12): 7-12.

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高温时效对P91钢组织及硬度的影响

Effect of high temperature aging on microstructure and hardness of P91 steel

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