Effect of double quenching on microstructure and properties of GCr15 bearing steel
BAN Jia-le1.2, SHI Zhi-yue2, YU Feng2, CAO Wen-quan2, GUO Yu-zhong1
1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China; 2. Special Steel Research Institute, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China
Abstract：A double quenching process for GCr15 bearing steel is designed. Compared with the conventional heat treatment process,it is found that the tensile strength of GCr15 bearing treated by double quenching process is increased from 2 139.5 MPa to 2 654.5 MPa,and the median fatigue strength of rotary bending is increased from 1 000 MPa to 1 029 MPa. According to the qualitative characterization of the matrix structure,it was found that the structure after the two kinds of heat treatment was acicular martensite. Through quantitative calculation,it was found that the retained austenite content increased from 8.33% to 11.26%,and the dislocation density increased from 2.45×1012/cm2 to 3.09×1012/cm2. By means of scanning electron microscope,it is found that the double quenching process does not change the size,quantity and type of inclusions. Through the analysis of the relationship between microstructure and mechanical properties,it is found that the improvement of tensile strength,elongation and high cycle fatigue strength caused by double quenching is mainly attributed to the slow trip effect of retained austenite and the deformation uniformity caused by fine crystallization. Through the analysis of the relationship between microstructure and fatigue properties,it is found that the decrease of low cycle fatigue strength and the increase of high cycle fatigue strength caused by double quenching are mainly attributed to the transformation rate of retained austenite. The rapid austenite transformation leads to the increase of low-cycle stress concentration and the decrease of fatigue strength. On the contrary,the high cycle austenite trip relieves the stress concentration and improves the fatigue strength.
班佳乐, 史智越, 俞峰, 曹文全, 郭玉忠. GCr15轴承钢双淬火对组织性能影响[J]. 钢铁, 2022, 57(9): 114-122.
BAN Jia-le, SHI Zhi-yue, YU Feng, CAO Wen-quan, GUO Yu-zhong. Effect of double quenching on microstructure and properties of GCr15 bearing steel[J]. Iron and Steel, 2022, 57(9): 114-122.
[1] 王坤,胡锋,周雯,等. 轴承钢研究现状及发展趋势[J]. 中国冶金,2020,30(9):119.(WANG Kun,HU Feng,ZHOU Wen,et al. Research status and development trend of bearing steel[J]. China Metallurgy,2020,30(9):119.) [2] 刘雅政,周乐育,张朝磊,等. 重大装备用高品质轴承用钢的发展及其质量控制[J]. 钢铁,2013,48(8):1.(LIU Ya-zheng,ZHOU Le-yu,ZHANG Chao-lei,et al Development and quality control of bearing steel for heavy equipment[J]. Iron and Steel,2013,48(8):1.) [3] 李昭昆,雷建中,徐海峰,等. 国内外轴承钢的现状与发展趋势[J]. 钢铁研究学报,2016,28(3):1.(LI Zhao-kun,LEI Jian-zhong,XU Hai-feng,et al. Current status and development trend of bearing steel in China and abroad[J]. Journal of Iron and Steel Research,2016,28(3):1.) [4] 杨晓蔚. 高速铁路轴承概述[J]. 轴承,2011(10):59.(YANG Xiao-wei. High speed railway bearing overview[J]. Bearing,2011(10):59.) [5] 晁代勇. 高速铁路轴承试验台设计研究[D]. 洛阳:河南科技大学,2011.(CHAO Dai-yong. Design and Research of High Speed-Railway Bearing Test Rig[D]. Luoyang:Henan University of Science and Technology,2011.) [6] 李永德,杨振国,李守新,等. GCr15轴承钢超高周疲劳性能与夹杂物相关性[J]. 金属学报,2008(8):968.(LI Yong-de,YANG Zhen-guo,LI Shou-xin,et al. Correlations between very high cycle fatigue properties and inclusions of GCr15 bearing steel[J]. Acta Metallurgica Sinica,2008(8):968.) [7] 翁宇庆. 超细晶钢理论及技术进展[J]. 钢铁,2005,40(3):1.(WENG Yu-qing. Progress of Theory and Controlled Technology of Ultrafine Grained Steel[J]. Iron and Steel,2005,40(3):1.) [8] 俞峰,陈兴品,徐海峰,等. 滚动轴承钢冶金质量与疲劳性能现状及高端轴承钢发展方向[J]. 金属学报,2020,56(4):513.(YU Feng,CHEN Xing-pin,XU Hai-feng,et al. Current status of metallurgical quality and fatigue performance of rolling bearing steel and development direction of high-end bearing steel[J]. Acta Metallurgica Sinica,2020,56(4):513.) [9] 干勇,董瀚. 先进钢铁材料技术的进展[J]. 中国冶金,2004,14(8):3.(GAN Yong,DONG Han. Recent progressin advanced steel technologies[J]. China Metallurgy,2004,14(8):3.) [10] Sakai T,Miura H,Yang X. Ultrafine grain formation in face centered cubic metals during severe plastic deformation[J]. Materials Science and Engineering:A,2009,499(1/2):2. [11] 郭汉杰. 中国冶金装备冶炼高铁轨道用钢关键问题研究[J]. 冶金设备,2016(1):1.(GUO Han-jie. Study about key issues of the steel for high-speed railway track with Chinese metallurgical equipment[J]. Metallurgical Equipment,2016(1):1.) [12] Zerbst U,Madia M,Klinger C,et al. Defects as a root cause of fatigue failure of metallic components. II:Non-metallic inclusions[J]. Engineering Failure Analysis,2019,98:228. [13] YANG Z G,YAO G,LI G Y,et al. The effect of inclusions on the fatigue behavior of fine-grained high strength 42CrMoVNb steel[J]. International Journal of Fatigue,2004,26(9):959. [14] Takaki S,Kimura Y. Ultra grain refining of iron using mechanical milling technique[J]. Journal of the Japan Society of Powder and Powder Metallurgy,1999,46(12):1235. [15] 董瀚. 超细晶粒钢及其力学性能特征[J]. 中国冶金,2003,13(10):29.(DONG Han. Ultrafine grained steels and their mechanical properties[J]. China Metallurgy,2003,13(10):29.) [16] 江涛,陈君豪. GCr15轴承钢晶粒和碳化物细化工艺的研究[J]. 轴承,1985(5):22.(JIANG Tao,CHEN Jun-hao. Study on grain and carbide refinement of GCr15 bearing steel[J]. Bearing,1985(5):22.) [17] Ruffing C,Ivanisenko Y,Kerscher E. A comparison of the fatigue and fracture behavior of high strength ultrafine grained medium carbon steel SAE 1045 with high strength bearing steel SAE 52100[J]. Procedia Structural Integrity,2016(2):3240. [18] 王艳山,陈小超,尤蕾蕾,等. GCr15轴承钢双细化工艺研究[J]. 金属加工(热加工),2018(9):52.(WANG Yan-shan,CHEN Xiao-chao,YOU Lei-lei,et al. Study on double refining process of GCr15 bearing steel[J]. MW Metal Forming,2018(9):52.) [19] 应俊龙,沈国喜,巢昺轩,等. CrWMn模具钢固溶-循环相变双细化工艺研究[J]. 热加工工艺,2019,48(20):167.(YING Jun-long,SHEN Guo-xi,CHAO Bing-xuan,et al. Study on double refining process of solid solution-cyclic phase transformation for CrWMn die steel[J]. Hot Working Technology,2019,48(20):167.) [20] 郭宁. 桥梁缆索用冷拔珠光体钢丝微观组织表征及力学性能研究[D]. 重庆:重庆大学,2012.(GUO Ning. A Study on Microstructural Characterization and Mechanical Properties of Cold Drawing Pearlitic Steel Wires for Bridge Cable[D]. Chongqing:Chongqing University,2012.) [21] ZHOU Cheng,YE Qi-bin,HU Jun,et al. Ultra-high-strength multi-alloyed steel with enhanced cryogenic toughness using thermally stable retained austenite[J].Materials Science and Engineering:A,2022(831):142356. [22] ZHOU Li-na,TANG Guang-ze,MA Xin-xin,et al. Relationship between microstructure and mechanical properties of M50 ultra-high strength steel via quenching-partitioning-tempering process[J]. Materials Characterization,2018(146):258. [23] Jeongho Han,Seung-Joon Lee,Jae-Gil Jung,et al. The effects of the initial martensite microstructure on the microstructure and tensile properties of intercritically annealed Fe-9Mn-0.05C steel[J]. Acta Materialia,2014(78):369. [24] Kyong Su Park,Soo Jeong Cho,Kyoo Young Lee,et al. Effect of volume fraction of undissolved cementite on the high cycle fatigue properties of high carbon steels[J]. International Journal of Fatigue,2007(29):1863. [25] 高古辉,陈倩如,郭浩冉,等. 贝/马复相钢超高周疲劳行为及非夹杂起裂[J]. 材料导报,2017,31(20):48.(GAO Gu-hui,CHEN Qian-ru,GUO Hao-ran,et al. Very high cycle fatigue behaviors of bainite/martensite multi-phase steel and mechanism of non-inclusion induced crack initiation[J]. Materials Reports,2017,31(20):48.) [26] 赵平. 贝/马复相钢超高周疲劳行为及非夹杂起裂机理研究[D]. 北京:清华大学,2016.(ZHAO Ping. The Very High Cycle Fatigue Behavior and Mechanism of Non-inclusion Induced Crack Initiation of Bainite/Martenite multiphase Steel[D]. Beijing:Tsinghua University,2016.)
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