金属热处理 ›› 2021, Vol. 46 ›› Issue (4): 187-191.DOI: 10.13251/j.issn.0254-6051.2021.04.034

• 测试与分析 • 上一篇    下一篇

不同温度时效后17-4PH不锈钢的高周腐蚀疲劳性能

高艾瑞1, 高圆1, 席生岐1, 石联峰2, 梁刚2, 高振旭1   

  1. 1.西安交通大学 材料科学与工程学院 金属材料强度国家重点实验室, 陕西 西安 710049;
    2.东方电气集团东方汽轮机有限公司, 四川 德阳 618000
  • 收稿日期:2020-10-05 出版日期:2021-04-25 发布日期:2021-05-08
  • 通讯作者: 席生岐(1964—),男,教授,博士,博士生导师,E-mail:xishq@mail.xjtu.edu.cn
  • 作者简介:高艾瑞(1994—),男,硕士研究生,主要研究方向为材料断裂与疲劳,E-mail:18681874263@163.com。
  • 基金资助:
    东方汽轮机有限公司合作项目(20181002);海洋腐蚀与防护重点实验室开放研究基金(6142901180402)

High cycle corrosion fatigue properties of 17-4PH stainless steel aged at different temperatures

Gao Airui1, Gao Yuan1, Xi Shengqi1, Shi Lianfeng2, Liang Gang2, Gao Zhenxu1   

  1. 1. State Key Laboratory of Metal Material Strength, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an Shaanxi 710049, China;
    2. Dongfang Electric Group Dongfang Turbine Co., Ltd., Deyang Sichuan 618000, China
  • Received:2020-10-05 Online:2021-04-25 Published:2021-05-08

摘要: 对17-4PH不锈钢进行固溶+稳定化+时效处理,分析了568 ℃和605 ℃两种温度时效后17-4PH不锈钢的显微组织、硬度、裂纹扩展速率、腐蚀疲劳断口以及疲劳极限。结果表明:时效温度为568 ℃的17-4PH不锈钢疲劳极限相对于605 ℃时效温度的疲劳极限明显提高,其疲劳裂纹扩展门槛值高于605 ℃的,疲劳扩展速率明显低于605 ℃的。两种温度时效后钢的疲劳断口均属于解理断裂。

关键词: 17-4PH不锈钢, 高周腐蚀疲劳, 疲劳性能, 裂纹扩展

Abstract: 17-4PH stainless steel was treated with solid solution, stabilization and aging treatments, then the microstructure, hardness, crack growth rate, corrosion fatigue fracture and fatigue limit of the 17-4PH stainless steel aged at 568 ℃ and 605 ℃ respectively were analyzed. The results show that the fatigue limit of 17-4PH stainless aged at 568 ℃ is significantly higher than that aged at 605 ℃. For the specimen aged at 568 ℃, the fatigue growth rate is lower than that aged at 605 ℃, while the threshold of fatigue crack propagation is higher than the latter. The fatigue fractures of the tested steel after aging at 568 ℃ and 605 ℃ are both belonging to cleavage fracture.

Key words: 17-4PH stainless steel, high cycle corrosion fatigue, fatigue performance, crack propagation

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