| 不同温度时效后17-4PH不锈钢的高周腐蚀疲劳性能 |
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| 引用本文： | 高艾瑞,高圆,席生岐,石联峰,梁刚,高振旭.不同温度时效后17-4PH不锈钢的高周腐蚀疲劳性能[J].金属热处理,2021,46(4):187-191. |
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| 作者姓名： | 高艾瑞 高圆 席生岐 石联峰 梁刚 高振旭 |
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| 作者单位： | 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 |
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| 基金项目： | 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) |
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| 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。
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| 关 键 词： | 17-4PH不锈钢 高周腐蚀疲劳 疲劳性能 裂纹扩展 |
| 收稿时间： | 2020-10-05 |
High cycle corrosion fatigue properties of 17-4PH stainless steel aged at different temperatures |
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| Gao Airui,Gao Yuan,Xi Shengqi,Shi Lianfeng,Liang Gang,Gao Zhenxu.High cycle corrosion fatigue properties of 17-4PH stainless steel aged at different temperatures[J].Heat Treatment of Metals,2021,46(4):187-191. |
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| Authors: | Gao Airui Gao Yuan Xi Shengqi Shi Lianfeng Liang Gang Gao Zhenxu |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | 17-4PH stainless steel high cycle corrosion fatigue fatigue performance crack propagation |
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