Effects of smelting process on fatigue performance of 15-5PH stainless steel
GUAN Zhen1,2, SUN Yong-qing2, LI Li1, TIAN Shuai2,3, LIU Zhen-bao2, LIANG Jian-xiong2
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.
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.
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. Iron and Steel, 2020, 55(1): 72-80.
[1] 刘振宝,梁剑雄,杨志勇,等. 碳含量对15-5PH沉淀硬化不锈钢板材的组织与性能的影响[J]. 航空材料学报,2011,31(1):7.(LIU Zhen-bao,LIANG Jian-xiong,YANG Zhi-yong,et al. The carbon content of the 15-5PH precipitation hardened stainless steel sheet and its structure performance impact[J]. Journal of Aeronautical Material,2011,31(1):7.) [2] 张秀丽,陈明昕,刘振宝,等. 热处理工艺对15-5PH沉淀硬化不锈钢的力学性能与耐蚀性的影响[J]. 钢铁,2014,49(8):70.(ZHANG Xiu-li,CHEN Ming-xin,LIU Zhen-bao,et al. Effect of heat treatment on mechanical properties and corrosion resistance of 15-5PH stainless steel[J]. Iron and Steel,2014,49(8):70.) [3] 高晓婷,任卫斌. 15-5PH马氏体沉淀硬化不锈钢的最佳固溶保温时间[J]. 金属热处理,2013,38(2):119.(GAO Xiao-ting,REN Wei-bin. Optimum solution holding time of 15-5PH martensite precipitation hardening stainless steel[J]. Metal Heat Treatment,2013,38(2):119.) [4] 仇振安,王海涛,李继良,等. 热处理工艺对15-5PH不锈钢组织和力学性能的影响[J]. 金属热处理,2014(5):77.(QIU Zhen-an,WANG Hai-tao,LI Ji-liang,et al. Effect of heat treatment on microstructure and mechanical properties of 15-5PH stainless steel[J]. Metal Heat Treatment,2014(5):77.) [5] Holappa L E K,Helle A S. Inclusion control in high-performance steels[J]. Journal of MaterialsProcessing Technology,1995,53(1/2):177. [6] KANG Y B,HAN S K,JIAN Z,et al. Practical application of thermodynamics to inclusions engineering in steel[J]. Journal of Physics and Chemistry of Solids,2005,66(2):219. [7] 张凤武. 高强钢疲劳裂纹扩展研究[D]. 武汉:武汉理工大学,2011.(ZHANG Feng-wu. The Study on Fatigue Crack Growth of High Strength Steel[D]. Wuhan:Wuhan University of Technology,2011.) [8] 廉学魁,王春旭,刘宪民,等. 二次硬化超高强度钢的高周疲劳性能研究[J]. 钢铁,2011,46(2):69.(LIAN Xue-kui,WANG Chun-xu,LIU Xian-min,et al. High-cycle fatigue properties of secondary hardening ultra-high strength steel[J]. Iron and Steel,2011,46(2):69.) [9] Tanaka K,Akiniwa Y. Fatigue crack propagation behaviour derived from S-N data in very high cycle regime[J]. Fatigue and Fracture of Engineering Materials and Structures,2010,25(8/9):775. [10] 耿思远,杨卯生,赵昆渝. 高钴钼不锈轴承钢疲劳裂纹萌生及扩展行为[J]. 钢铁研究学报,2018,30(11):906.(GENG Si-yuan,YANG Mao-sheng,ZHAO Kun-yu. Fatigue crack initiation and propagation behavior of high cobalt molybdenum stainless bearing steel[J]. Journal of Iron and Steel Research,2018(11):906.) [11] Kozin F,Bogdanoff J L. A critical analysis of some probabilistic models of fatigue crack growth[J]. Engineering Fracture Mechanics,1981,14(1):59.
2020, Vol. 55 
