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Precipitation behavior and mechanical properties of hot-rolled high strength Ti–Mo-bearing ferritic sheet steel: The great potential of nanometer-sized (Ti, Mo)C carbide

Published online by Cambridge University Press:  11 May 2016

Ke Zhang ,
Zhaodong Li ,
Zhenqiang Wang ,
Xinjun Sun  and
Qilong Yong
Ke Zhang*
Affiliation:
School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China and Department of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China
Zhaodong Li
Affiliation:
Department of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China
Zhenqiang Wang*
Affiliation:
Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, China, Harbin Engineering University, Harbin 150001, China
Xinjun Sun
Affiliation:
Department of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China
Qilong Yong
Affiliation:
Department of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China
*
a) Address all correspondence to these authors. e-mail: [email protected]
b) e-mail: [email protected]
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Abstract

A new ultrahigh strength hot rolled Ti–Mo-bearing ferritic steel was developed through chemical composition design and rolling processing optimization. To maximize the potential of nanometer-sized (Ti, Mo)C carbide in terms of strengthening ferrite matrix, the optimal chemical composition of 0.1C–0.2Ti–0.4Mo (wt%) was determined through considering the atomic ratio of elements, the solubility temperature of (Ti, Mo)C in austenite, and the excessive growth critical temperature of austenite grain during reheating. The rolling condition in the region through austenite recrystallization region to austenite nonrecrystallization region was adopted to realize a homogenous and fine ferrite grain structure. Results showed that the simulated coiling at 600 °C was found to provide an attractive combination of ferrite grain refinement hardening (360 MPa) and precipitation hardening (324 MPa). An optimal combination of strength and ductility was achieved after coiling at 600 °C (yield strength: 912 MPa; ultimate tensile strength: 971 MPa; total elongation: 16.0%). In addition, the nanometer-sized (Ti, Mo)C carbide was characterized by transmission electron microscopy (TEM) and physical–chemical phase analysis, and its role was discussed in details.

Keywords

(Ti, Mo)Ccoiling temperatureprecipitation hardeningnano-sized carbidegrain refinement
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 9 , 14 May 2016 , pp. 1254 - 1263
Copyright
Copyright © Materials Research Society 2016 

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References

REFERENCES

Funakawa, Y., Shiozaki, T., Tomita, K., Yamamoto, T., and Maeda, E.: Development of high strength hot-rolled sheet steel consisting of ferrite and nanometer-sized carbides. ISIJ Int. 44, 1945–1951 (2004).Google Scholar
Gladman, T.: The Physical Metallurgy of Microalloyed Steels, 2nd ed. (The Institute of Materials, London, 1997).Google Scholar
Chen, C.Y., Yen, H.W., Kao, F.H., Li, W.C., Huang, C.Y., Yang, J.R., and Wang, S.H.: Precipitation hardening of high-strength low-alloy steels by nanometer-sized carbides. Mater. Sci. Eng., A 499, 162–166 (2009).CrossRefGoogle Scholar
Duan, X.G., Cai, Q.W., and Wu, H.B.: Ti–Mo ferrite micro-alloy steel with nanometer-sized precipitates. Acta Metall. Sin. 47, 251–256 (2011).Google Scholar
Hu, B.H.: Mater Dissertation, University of Science and Technology Beijing, 2012.Google Scholar
Kamikawa, N., Abe, Y., Miyamoto, G., Funakawa, Y., and Furuhara, T.: Tensile behavior of Ti, Mo-added low carbon steels with interphase precipitation. ISIJ Int. 54, 212–221 (2014).CrossRefGoogle Scholar
Yen, H.W., Chen, P.Y., Huang, C.Y., and Yang, J.R.: Interphase precipitation of nanometer-sized carbides in a titanium–molybdenum-bearing low-carbon steel. Acta Mater. 59, 6264–6274 (2011).Google Scholar
Funakawa, Y. and Seto, K.: Coarsening behavior of nanometer-sized carbides in hot-rolled high strength sheet steel. Mater. Sci. Forum 539, 4813–4818 (2007).Google Scholar
Kim, Y.W., Song, S.W., Seo, S.J., Hong, S., and Lee, C.S.: Development of Ti and Mo micro-alloyed hot-rolled high strength sheet steel by controlling thermomechanical controlled processing schedule. Mater. Sci. Eng., A 565, 430–438 (2013).CrossRefGoogle Scholar
Sun, C.F., Cai, Q.W., W, H.B., Mao, H.Y., and Chen, H.Z.: Effect of controlled rolling processing on nanometer-sized carbonitride of Ti–Mo ferrite matrix microalloyed steel. Acta Metall. Sin. 48, 1415–1421 (2012).Google Scholar
Kim, Y.W., Hong, S.G., Huh, Y.H., and Lee, C.S.: Role of temperature in the precipitation hardening characteristics of Ti–Mo microalloyed hot-rolled high strength steel. Mater. Sci. Eng., A 615, 255–261 (2014).Google Scholar
Kim, Y.W., Kim, J.H., Hong, S.G., and Lee, C.S.: Effects of rolling temperature on the microstructure and mechanical properties of Ti–Mo microalloyed hot-rolled high strength steel. Mater. Sci. Eng., A 605, 244–252 (2014).CrossRefGoogle Scholar
Duan, X.G., Cai, Q.W., Wu, H.B., and Tang, D.: Precipitation law of ultra fine carbides in ferrite matrix Ti–Mo microalloyed steel. J. Univ. Sci. Technol. Beijing 34, 644–650 (2012).Google Scholar
Jha, G., Das, S., Lodh, A., and Haldar, A.: Development of hot rolled steel sheet with 600 MPa UTS for automotive wheel application. Mater. Sci. Eng., A 552, 457–463 (2012).Google Scholar
Jha, G., Das, S., Sinha, S., Lodh, A., and Haldar, A.: Design and development of precipitate strengthened advanced high strength steel for automotive application. Mater. Sci. Eng., A 561, 394–402 (2013).Google Scholar
Li, D.L., Fang, J.F., Liu, Q.B., Lu, C.F., and Zhang, J.Y.: Determination of particle size of precipitate phase in steel and alloy by small angle X-ray scattering method. Metall. Anal. 28, 1–8 (2008).Google Scholar
Wang, C.J., Sun, X.J., Yong, Q.L., Li, Z.D., Zhang, X., and Jiang, L.: Effect of banitic transformation temperature on the microstructure and mechanical properties of the rolled trip steel containing Ti and Mo and its precipitation characteristics. Acta Metall. Sin. 49, 399–407 (2013).Google Scholar
Picking, F.B.: Physical metallurgy and the design of steels (Applied Science Publishers Ltd., London, 1978).Google Scholar
Mao, X.P., Huo, X.D., Sun, X.J., Cai, Y.Z.: Strengthening mechanisms of a new 700 MPa hot rolled Ti-microalloyed steel produced by compact strip production. J. Mater. Process. Technol., 210, 1660–1666 (2010).Google Scholar
Yong, Q.L., Ma, M.T., and Wu, B.R.: Microalloyed Steel-Physical, and Mechanical Metallurgy (China Machine Press, Beijing, 1989).Google Scholar
Petch, N.J.: The cleavage strength of polycrystals. J. Iron Steel Inst., London 174, 25–28 (1953).Google Scholar
Petch, N.J.: The ductile-brittle transition in the fracture of a-iron. Philos. Mag. 34, 1089–1097 (1958).Google Scholar
Yong, Q.L.: Secondary Phases in Steel (Metallurgical Industry Press, Beijing, 2006).Google Scholar
Shen, Y.F., Wang, C.M., and Sun, X.: A micro-alloyed ferritic steel strengthened by nanoscale precipitates. Mater. Sci. Eng., A 528, 8150–8156 (2011).Google Scholar
Bailey, J.E. and Hirsch, P.B.: The dislocation distribution, flow stress, and stored energy in cold-worked polycrystalline silver. Philos. Mag. 5, 485–497 (1960).CrossRefGoogle Scholar
Chin, G.Y. and Mammel, W.L.: T Computer solutions of Taylor analysis for axisymmetric flow. Trans. Metall. Soc. AIME 239, 1400–1409 (1967).Google Scholar
Keh, A.S.: Work hardening and deformation sub-structure in iron single crystals deformed in tension at 298 K. Philos. Mag. 12, 9–30 (1965).CrossRefGoogle Scholar
Zhang, K., Yong, Q.L., Sun, X.J., Li, Z.D., Zhao, P.L., and Chen, S.D.: Effect of tempering temperature on microstructure and mechanical properties of high Ti microalloyed directly quenched high strength steel. Acta Metall. Sin. 50, 913–920 (2014).Google Scholar
Dutta, B., Valdes, E., and Sellars, C.M.: Mechanism and kinetics of strain induced precipitation of Nb (C, N) in austenite. Acta Mater. 40, 653–662 (1992).Google Scholar
Dutta, B., Palmiere, E.J., and Sellars, C.M.: Modelling the kinetics of strain induced precipitation in Nb microalloyed steels. Acta Mater. 49, 785–794 (2001).Google Scholar
Kang, Y.L.: Theory and technology of processing and forming for advanced automobile steel sheets (Metallurgical Industry Press, Beijing, 2009).Google Scholar
Lagneborg, R. and Zajac, S.: A model for interphase precipitation in V-microalloyed structural steels. Metall. Mater. Trans. A 32, 39–50 (2001).CrossRefGoogle Scholar
Pereloma, E., Crawford, B., and Hodgson, P.: Strain-induced precipitation behavior in hot rolled strip steel. Mater. Sci. Eng., A 299, 27–37 (2001).Google Scholar
Wang, Z.Q.: PhD Thesis, Tsinghua University, Beijing, 2013.Google Scholar
Honeycombe, R.W.K. and Mehl, R.F.: Transformation from austenite in alloy steels. Metall. Trans. A 7, 915–936 (1976).CrossRefGoogle Scholar
Smith, R.M. and Dunne, D.P.: Structural aspects of alloy carbonitride precipitation in microalloyed steels. Materials Forum, 11, 166–181.Google Scholar
Porter, D.A., Easterling, K.E., and Sherif, M.: Phase Transformations in Metals and Alloys, (Revised Reprint) (CRC Press, Boca Raton, 2009).CrossRefGoogle Scholar
Wang, Z.Q., Sun, X.J., Yang, Z.G., Yong, Q.L., Zhang, Z., Li, Z.D., and Weng, Y.Q.: Carbide precipitation in austenite of a Ti–Mo-containing low-carbon steel during stress relaxation. Mater. Sci. Eng., A 573, 84–91 (2013).Google Scholar