In the present research, two kinds of low carbon bainite materials were developed for fishplate usage. Their microstructure and mechanical properties were measured in detail. The results showed that one material was composed of fine granular bainite with the yield strengths of 722 MPa at room temperature and 738 MPa at -55oC, the elongation percentages of 60.7% and 41.7% respectively. The other one had a meta-bainite microstructure with corresponding strengths of 568.5 MPa and 700 MPa, the elongation percentages of 63.5% and 67.1%. These values are all superior to the home-made B7 steel and the fishplate materials made in Japan. The major strengthening mechanisms were discussed and contributed to the solid solution, complex phases, fine grain and dislocation strengthening.
FUMIN XU
. Microstructures and Mechanical Properties of Low Carbon Fishplate Materials[J]. Acta Metallurgica Sinica (English Letters), 2010
, 23(3)
: 176
-184
.
DOI: 10.11890/1006-7191-103-176
[1] C.K. Hu, Master Thesis (Chongqing University, Chongqing, 2005) (in Chinese).
[2] J.M. Luo, S.Z. Liu and W. Teng, J Southwest Jiaotong Univ 30(2) (1995) 182.
[3] H.S. Fang, X.Z. Bo and Y.K. Zheng, Heat Treat Met 23(11) (1998) 1.
[4] Z.Y. Chen, Q.Y. Zhou and Y.H. Zhang, J China Railway Soc 27(3) (2005) 35.
[5] Y. Zhang, Y.H. Huang and H. Zhai, Mater Mech Eng 29(9) (2005) 8.
[6] J.Q. Cheng and M.K. Kang, Ordnance Mater Sci Eng 25(1) (2002) 61.
[7] J.L. Sun, S.L. Ma and M.K. Kang, Mater Sci Technol 9(1) (1990) 1.
[8] W.B. Fang, E.D. Wang and Y. Yang, Chin J Nonferrous Met 14(6) (2004) 907.
[9] B.T. Wu, Master Thesis (Central South University, Hunan Province, 2005) (in Chinese).
[10] Y.H. Lu, P.S. Qiu and Z.Q. Cui, Eng Mater (Harbin Institute of Technology Press, 2005) (in Chinese).
[11] Z.J. He, Mech Prop Met (Metallurgical Industrial Press, 1982) (in Chinese).
[12] M.E. Bush and P.M. Kelly, Acta Metall 19(12) (1971) 1363.
[13] L.B. Zhou, J. Zhao and R. Zhang, Phys Test Chem Anal Part A:Physical 27(5) (1991) 15.
[14] M.K. Kang, Metall Trans A 21(4) (1990) 853.
[15] Y. Sakuma and O. Matsumura, Metall Trans A 22(2) (1991) 489.
WeChat