时效处理对15-5PH不锈钢室温和低温力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.09.030

金属热处理 ›› 2024, Vol. 49 ›› Issue (9): 191-197.DOI: 10.13251/j.issn.0254-6051.2024.09.030

时效处理对15-5PH不锈钢室温和低温力学性能的影响

徐锋¹, 孙强¹, 贾云浩²

1.宝武特种冶金有限公司, 上海 200940;
2.北京科技大学材料科学与工程学院, 北京 100083

收稿日期:2024-03-02 修回日期:2024-07-27 出版日期:2024-09-25 发布日期:2024-10-29
作者简介:徐锋(1975—),男,高级工程师,博士,主要研究方向为先进金属材料研发,E-mail:xufeng396@ baosteel.com

Effect of aging treatment on mechanical properties at room temperature and low temperature of 15-5PH stainless steel

Xu Feng¹, Sun Qiang¹, Jia Yunhao²

1. BAOWU Special Metallurgy Co., Ltd., Shanghai 200940, China;
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received:2024-03-02 Revised:2024-07-27 Online:2024-09-25 Published:2024-10-29

摘要/Abstract

摘要： 对15-5PH沉淀硬化不锈钢在1040 ℃保温1 h固溶处理后,进行480 ℃保温不同时间(1、2、4 h)的时效处理,并对其显微组织、断口形貌和性能进行观察和测试,研究时效时间对其室温和-50 ℃低温力学性能的影响。结果表明,随时效时间延长,15-5PH钢室温拉伸性能和冲击性能变化不明显;-50 ℃拉伸性能变化也不明显,但冲击性能显著提高,冲击吸收能量从31.5 J提高到77.5 J,归因于时效保温时间越长,钢中逆转变奥氏体含量越高,导致低温冲击性能越好。

关键词: 15-5PH沉淀硬化不锈钢, 时效处理, 组织, 力学性能

Abstract: 15-5PH precipitation-hardened stainless steel was solution treated at 1040 ℃ for 1 h, and then aged at 480 ℃ for different time (1, 2, 4 h). The microstructure, fracture morphology and properties were observed and tested to study the effect of aging time on its mechanical properties at room temperature and -50 ℃. The results show that the tensile and impact properties of the 15-5PH steel at room temperature don't change significantly with the aging time increasing. The tensile properties at -50 ℃ have no obvious change, but the impact absorbed energy is significantly improved, the impact absorbed energy is increased from 31.5 J to 77.5 J, due to the longer the aging holding time, the higher the reversed austenite content in the steel, resulting in better low-temperature impact property.

Key words: 15-5PH precipitation-hardened stainless steel, aging treatment, microstructure, mechanical properties

中图分类号:

TG156

徐锋, 孙强, 贾云浩. 时效处理对15-5PH不锈钢室温和低温力学性能的影响[J]. 金属热处理, 2024, 49(9): 191-197.

Xu Feng, Sun Qiang, Jia Yunhao. Effect of aging treatment on mechanical properties at room temperature and low temperature of 15-5PH stainless steel[J]. Heat Treatment of Metals, 2024, 49(9): 191-197.

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时效处理对15-5PH不锈钢室温和低温力学性能的影响

Effect of aging treatment on mechanical properties at room temperature and low temperature of 15-5PH stainless steel

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