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 15-5 PH stainless steel
徐锋 1孙强 1贾云浩2
作者信息
- 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
- 折叠
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.
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 15-5 PH 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.
关键词
15-5PH沉淀硬化不锈钢/时效处理/组织/力学性能Key words
15-5PH precipitation-hardened stainless steel/aging treatment/microstructure/mechanical properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据