Effect of Retained Austenite Stability on Mechanical Properties of Bainitic Rail Steel

Abstract:

Retained austenite has an important effect on strength and toughness of 20Mn2SiCrMo bainitic rail steel. In this work, the stability of retained austenite and mechanical properties have been studied. The results show that impact toughness of experimental steel has close relationship with the stability of retained austenite. When tempered at lower than 350°C, retained austenite owns good thermal stability, corresponding to relatively high impact toughness.

• Periodical: Advanced Materials Research (Volumes 1004-1005)
• Pages: 198-202
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.198
• Online since: August 2014
• Authors: Kai Kai Wang, Zhun Li Tan*, Gu Hui Gao, Xiao Lu Gui, Bing Zhe Bai
• Keywords: Bainitic Rail Steel, Mechanical Property, Retained Austenite, Stability

References

[1] Kuoichi Uchino, et al. Development of Hypereutectoid Steel Rail for Heavy Haul Railways[C]. 39TH MWSP. CONF. PROC. ISS, 1998(XXXV): 1047-1055.

[2] A Kern, et al. The Development of Bainitic Steels for Special Railway System Requirements[C], 39TH MWSP CONF. PROC., ISS, 1998, (XXXV): 1014-1021.

[3] Clayton P. Wear Behavior of Bainitic Steels[J]. Wear, 1987, (120): 199.

DOI: 10.1016/0043-1648(87)90067-6

[4] K.J. Sawley, Technology Digest TD97-001, (1997).

[5] Bhadeshia H K D H. Bainite in Steels[M]. London: Istitute of Materials, (2001).

[6] Chen jian-jun, researchon Bainite Steel Rail With High Strengthand High Toughness, Heat Treatment [J], 1008—1690(2008)03—0002—018. (In Chinese).

[7] Davis D D. An Update on Revenue Service Tests of Bainitic Steel Rail Crossing Diamonds[J]. Railway Track&Structure, 2003, 99(1), 15.

[8] Caballero F G, Bhadeshia H K D H, Mawella K J A. Design of Novel High Strength Bainitic Steels: Part1 [J]. Materials Scienceand Technology, 2001, 17(5): 512.

DOI: 10.1179/026708301101510348

[9] Kern A , Schtncdders H, The Development of Bainitic Steels for Special Railway System Requirements [J]. 39th MWSP Conf Proc , ISS, 1998, 35; 1015.

[10] Hiroyasu Yokoyama. High Strength Bainitic Steel Rails for Heavy Haul Railways With Superior Damage Resistance[J]. NKK Technical Review, 2001, 84: 44.

[11] FANG Hong-sheng, FENG Chun, ZHENG Yan-kang, YANG Zhi-gang, BAI Bingzhe, Heat Treatment[J], 2008; 23(3): 2-19. (In Chinese).

[12] Z. Li, D. Wu, ISIJ Int. 46/1 (2006) 121-128.

[13] Kruijver SO, Zhao L, Sietsma J, Offerman SE, van Dijk NH, Margulies L, Lauridsen E, Grigull S, Poulsen HF, van der Zwaag S. Steel Res 2002; 73: 236.

DOI: 10.1002/srin.200200202

[14] Turteltaub S, Suiker ASJ. Int J Solids Struct 2006; 43: 7322.

[15] Z.H. Cai, H. Ding, X. Xue, Q.B. Xin, Materials Science & Engineer A 560 (2013) 388-395.

[16] Ren Yongqiang, Xie Zhenjia, Shang Chengjia. Acta Metallurgica Sinica [J], 2012; 48 (9): 1074-1080. (In Chinese).

[17] L. Yuan, D. Ponge, J. Wittig, P. Choi, J. A. Jimenez, D. Raabe, Acta Mater. 60 (2012) 2790-2804.