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| 冶炼工艺对15-5PH不锈钢疲劳性能的影响 | |
| 引用本文： | 管真,孙永庆,李莉,田帅,刘振宝,梁剑雄.冶炼工艺对15-5PH不锈钢疲劳性能的影响[J].钢铁,2020,55(1):72-80. |
| 作者姓名： | 管真 孙永庆 李莉 田帅 刘振宝 梁剑雄 |
| 作者单位： | 1. 昆明理工大学材料科学与工程学院, 云南 昆明 650000; 2. 钢铁研究总院特殊钢研究所, 北京 100081; 3. 南京航空航天大学材料科学与技术学院, 江苏 南京 210000 |
| 基金项目： | 国家重点研发计划资助项目(2016YFB0300104) |
| 摘 要： | 为了研究冶炼工艺对15-5PH不锈钢疲劳性能的影响,通过ASPEX夹杂物分析、拉压疲劳试验和扫描电镜等手段并结合裂纹扩展速率试验,研究了冶炼工艺对15-5PH不锈钢中夹杂物的粒径分布和疲劳性能的影响,并对比了两种试验钢裂纹扩展速率的大小。结果表明,VIM+VAR工艺冶炼的1号试验钢总氧质量分数较低,夹杂物尺寸较小且质量分数较低,1号试验钢的疲劳强度比单真空工艺冶炼的2号试验钢高30 MPa,通过疲劳断口SEM观察,1号试验钢在表面基体起裂,2号试验钢的裂纹源是次表面的Al2O3夹杂物;相同条件下,1号试验钢裂纹扩展速率大于2号试验钢。 |
| 关 键 词： | 15-5PH不锈钢 总氧质量分数 夹杂物 裂纹扩展速率 |
| 收稿时间： | 2019-03-18 |
Effects of smelting process on fatigue performance of 15-5PH stainless steel |
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| GUAN Zhen,SUN Yong-qing,LI Li,TIAN Shuai,LIU Zhen-bao,LIANG Jian-xiong.Effects of smelting process on fatigue performance of 15-5PH stainless steel[J].Iron & Steel,2020,55(1):72-80. | |
| Authors: | GUAN Zhen SUN Yong-qing LI Li TIAN Shuai LIU Zhen-bao LIANG Jian-xiong |
| Affiliation: | 1. Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650000, Yunnan, China; 2. Institute of Special Steels, Central Iron and Steel Research Institute,Beijing 100081, China; 3. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210000, Jiangsu, China |
| Abstract: | In order to study the effect of smelting processs on the fatigue properties of 15-5PH stainless steel,the effects of smelting process on the particle size distribution and fatigue properties of inclusions in 15-5PH stainless steel were studied by ASPEX inclusion analysis,tensile fatigue test,scanning electron microscopy and crack growth rate experiments. The crack growth rates of the two test steels were also compared. The results showed that No.1 test steel smelted by VIM+VAR process had lower total oxygen mass percent,smaller inclusion size and less mass percent. The fatigue strength of No.1 test steel was 30 MPa higher than that of No.2 test steel smelted by single vacuum process. By means of SEM observation of fatigue fracture,No.1 test steel cracked on the surface matrix,and the crack source of No.2 test steel was subsurface Al2O3 inclusion. Under the same conditions,the crack growth rate of No.1 test steel was faster than No.2 test steel. |
| Keywords: | 15-5PH stainless steel total oxygen mass percent inclusion crack growth rate |
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