Abstract: The influence of self-tempering on the fatigue crack growth behavior of hypereutectoid rail was studied under the condition of quenching speed of 3 ℃/s, 5 ℃/s, 8 ℃/s and final cooling temperature of 450 ℃, Paris formula of fatigue crack growth rate was calculated, and the self-tempering was carried out by SEM and hardness tester the fatigue fracture of post hypereutectoid rail was observed and its hardness was tes-ted. The results show that after self-tempering, the fatigue crack growth rate of rail is accelerated, and hardness reduction, and the greater the quenching cooling rate before self-tempering, the more obvious the reduction of the anti-fatigue crack growth ability the and hardness after self-tempering, which the decrease of hardness increases the possibility of crack growth; there is no obvious threshold area after self-tempering, which will shorten the overall process of rail fatigue crack growth and accelerate the fatigue crack growth rate of quenched rail; different When ΔK=10 MPa·m1/2, the number of fatigue striations, cleavage surfaces and secondary cracks is less, the number of river patterns is more, the area is small, and the gullies are shallow. When ΔK=13.5 MPa·m1/2, the distance between fatigue striations increases, the cleavage surfaces and secondary cracks are more, the number and area of river patterns increase, and the fatigue crack growth rate is faster.
1 Zhang Y H, Zhou Q Y, Bao L, et al. China Railway Science. 2015, 36(4), 20(in Chinese). 张银花,周清跃,鲍磊,等.中国铁道科学. 2015,36(4),20. 2 Zhou Q Y, Zhang Y H, Chen C Y, et al. China Railway. 2011, (11), 47(in Chinese). 周清跃,张银花,陈朝阳,等. 中国铁路. 2011, (11), 47. 3 Zhou Q Y, Zhou C G. Acta metalica Sinica, 1990, 26 (4), 73 (in Chinese). 周清跃,周晨光.金属学报,1990,26(4), 73. 4 Ying J M, Sabry S. Yousse F, et al. Journal of Materials Science & Technology, 2018, 34(11), 2107. 5 Fan Y L, Kan Q H, Zhao J Z, et al. Journal of Mechanical Engineering, 2020, 56 (2), 35(in Chinese). 樊译璘,阚前华,赵吉中,等. 机械工程学报, 2020, 56(2), 35. 6 Zhu M L, Xuan F Z, Tu S T. International Journal of Pressure Vessels & Piping, 2013, 110,9. 7 Cui Z, Yang H, Wang W, et al. Engineering Fracture Mechanics, 2015, 133, 14. 8 Nguyen N, Yvonnet J, Réthoré J, et al. Computational Mechanics, 2019, 63 (6), 1351. 9 Yang Z X, Wang A H, Xiong D H, et al. China Mechanical Enginee-ring, 2019, 30 (3), 254(in Chinese). 杨志翔,王爱华,熊大辉,等.中国机械工程, 2019, 30(3), 254. 10 Zhong Z, Gu Y, Osada T. Journal of Materials Science, 2011, 46(23), 7573. 11 Zhou Z G. Journal of the China Railway Society, 1990, (4), 74(in Chinese). 周镇国.铁道学报,1990, (4), 74. 12 Morozov K V, Gromov V E, Ivanov Y F, et al. Metallurgist, 2016, 60(3), 422. 13 Zhou Y, Zhang J, Yang X W, et al. Journal of Tongji University (Natural Science Edition), 2015, 43 (6), 877(in Chinese). 周宇,张杰,杨新文,等.同济大学学报(自然科学版),2015,43(6), 877. 14 Gao W L, Qin F, Jin T, et al. Journal of Hunan University(Natural Sciences), 2017, 44 (6), 25(in Chinese). 高文理,钦凤,金滩,等.湖南大学学报(自然科学版),2017,44(6), 25. 15 Bao X R, Wang J A, Wang X D, et al. Journal of Railways, 2017, 39 (4), 118(in Chinese). 包喜荣,王均安,王晓东,等.铁道学报,2017,39(4),118. 16 Chen L, Wang H J, Guo F X. Materials Reports B:Research Papers, 2017, 31 (7), 109 (in Chinese). 陈林,王慧军,郭飞翔.材料导报:研究篇,2017,31(7), 109. 17 Cen Y D, Chen F R. Transactions of the China Welding Institution, 2017, 38 (6), 115(in Chinese). 岑耀东,陈芙蓉.焊接学报,2017,38(6), 115. 18 Chen L, Chen K Y, Chang G. Metallography Microstructure & Analysis, 2016, 5, 402. 19 Kanaev A T, Bogomolov A V, Kanaev A A. Steel in Translation, 2018, 48(2), 130. 20 Yang Y, Liu F, Chen Q W. Journal of Iron and Steel Research, 2015, 27 (12), 68(in Chinese). 杨奕,刘飞,陈其伟.钢铁研究学报,2015, 27(12), 68. 21 陈林,李革,刘宇雁,等.中国专利,ZL201410819238,7,2015 22 Cen Y D, Chen L, Dong R, et al. Journal of Materials Science, 2020, 55(30),15033. 23 Vorobev R A, Dubinskii V N, Evstifeeva V V. Physics of Metals and Metallography, 2019, 120(10),989.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2021, Vol. 35 
