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Effect of austenitic state on microstructure and mechanical properties of martensite/bainite steel

Published online by Cambridge University Press:  25 March 2014

Lei Tian ,
Qing Ao  and
Shengli Li
Lei Tian
Affiliation:
School of Materials Science and Engineering, Shandong University, Ji’nan 250061, China
Qing Ao
Affiliation:
School of Materials Science and Engineering, Shandong University, Ji’nan 250061, China
Shengli Li*
Affiliation:
School of Materials Science and Engineering, Shandong University, Ji’nan 250061, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Various heat treatments and thermal simulation with different austenitizing temperatures and austenite deformation were applied on a bearing steel to obtain various austenitic state. The effect of austenitic state on microstructure of martensite/bainite (M/B) dual phase steel and its mechanical property has been investigated via microstructure observation and kinetic analysis. The results show that the M/B steels austenitized at 900 and 950 °C have better comprehensive performance compared with the steels austenitized at 850 and 1050 °C. The refined microstructure can be obtained after deformation, and the heavy deformation and low deformation temperature are useful for refining the microstructure. The bainite lath is longer and has well-directional arrangement at high austenitizing temperature with the same deformation. Furthermore, austenite deformation can improve the nucleation ratio, reduce incubation process, and affect the kinetics of bainite transformation significantly.

Keywords

austenitizing temperatureaustenite deformationbainiteimpact toughness
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 7 , 14 April 2014 , pp. 887 - 895
Copyright
Copyright © Materials Research Society 2014 

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References

REFERENCES

Ohmori, Y., Ohtani, H., and Kunitake, T.: Tempering of the bainite and the bainite/martensite duplex structure in a low-carbon low-alloy steel. Met. Sci. 8(1), 357 (1974).CrossRefGoogle Scholar
Quidort, D. and Bréchet, Y.: The role of carbon on the kinetics of bainite transformation in steels. Scr. Mater. 47(3), 151 (2002).Google Scholar
Warke, V.S., Sisson, R.D. Jr., and Makhlouf, M.M.: The effect of porosity on the austenite to bainite transformation in powder metallurgy steels. J. Mater. Res. 24(10), 3213 (2009).CrossRefGoogle Scholar
Umemoto, M., Furuhara, T., and Tamura, I.: Effects of austenitizing temperature on the kinetics of bainite at constant austenite grain size in Fe-C and Fe-Ni-C alloys. Acta Metall. 34(11), 2235 (1986).CrossRefGoogle Scholar
Van der Zwaag, S. and Wang, J.: A discussion on the atomic mechanism of the bainitic reaction in TRIP steels. Scr. Mater. 47(3), 169 (2002).CrossRefGoogle Scholar
Zhao, H.Z., Lee, Y.K., Liu, X.H., and Wang, G.D.: The effects of austenite grain size on bainite transformation kinetics in AISI 4340 steel. Trans. Metal Heat Treat. 27(2), 59 (2006).Google Scholar
Matsumura, Y. and Yada, H.: Evolution of ultrafine-grained ferrite in hot successive deformation. Trans. ISIJ 27(6), 492 (1987).CrossRefGoogle Scholar
Yada, H., Li, C.M., and Yamagata, H.: Dynamic γ→α transformation during hot deformation in iron-nickel-carbon alloys. ISIJ Int. 40(2), 200 (2000).CrossRefGoogle Scholar
Jin, X.J., Min, N., and Zheng, K.Y.: The effect of austenite deformation on bainite formation in an alloyed eutectoid steel. Mater. Sci. Eng. A 438, 170 (2006).CrossRefGoogle Scholar
Shipway, P.H. and Bhadeshia, H.K.D.H.: The effect of small stresses on the kinetics of the bainite transformation. Mater. Sci. Eng. A 201(1), 143 (1995).CrossRefGoogle Scholar
Freiwillig, R., Kudrman, J., and Chráska, P.: Bainite transformation in deformed austenite. Metall. Trans. A 7(8), 1091 (1976).CrossRefGoogle Scholar
Tsuzaki, K., Ueda, T., Fujiwara, K., and Maki, T.: New Materials and Processes for the Future: Proceedings of the 1st Japan International SAMPE Symposium and Exhibition (Society for the Advancement of Materials and Process Engineering, Chiba, Japan, 1989); p. 699.Google Scholar
Li, C.X., Feng, H., Kang, M.K., and Mou, Y.W.: The effect of high-temperature thermo mechanical treatment (HTMT) on the strengthening and toughening. Trans. Metal Heat Treat. 8(2), 25 (1987).Google Scholar
Liu, Y.Z., Wang, Z.Y., and Zhang, Z.Q.: Influence of heat treatment process on mechanical properties and microstructure of 55SiMoV steel. Heat Treat. Metals 2, 10 (1996).Google Scholar
Lambers, H.G., Tschumak, S., Maier, H.J., and Canadinc, D.: Role of austenitization and pre-deformation on the kinetics of the isothermal bainitic transformation. Metall. Mater. Trans. A 40(6), 1355 (2009).CrossRefGoogle Scholar
Liu, Z.Y., Wang, G.D., and Zhang, Q.: Thermodynamic calculations on the deformed austenite–proeutectoid ferrite transformation. J. Iron Steel Res. 6(4), 31 (1996).Google Scholar
Bhadeshia, H.K.D.H.: Bainite in Steel (The Institute of Materials, London, 1992), p. 214.Google Scholar
Huang, C.Y., Yang, J.R., and Wang, S.C.: Effect of compressive deformation on the transformation behavior of an ultra-low-carbon bainitic steel. Mater. Trans. JIM 34, 658 (1993).CrossRefGoogle Scholar
Davenport, A.T., Miner, R.E., and Kot, R.A.: The Hot Deformation of Austenite, Ballance, J.B. ed.; AIME, New York, 1977; p. 186.Google Scholar
Russel, K.C.: Phase Transformations (ASM, Metals Park, Ohio, 1970), p. 219.Google Scholar
Lange, W.F., Enomoto, M., and Aaronson, H.I.: The kinetics of ferrite nucleation at austenite grain boundaries in Fe-C alloys. Metall. Trans. A 19(3), 427 (1988).CrossRefGoogle Scholar