Abstract
As thin slab direct rolling technologies are moving to the production of higher quality steel grades, chemical compositions based on Nb-Ti and Nb-Mo become a good option. However, with the use of multiple microalloying additions, the as-cast austenite conditioning becomes more complex. This paper analyzes some of the microstructural features that should be taken into account during the as-cast austenite conditioning in Nb-Ti and Nb-Mo microalloyed steel grades. In the case of Nb-Ti grades, it has been observed that the process parameters during solidification and post-solidification steps affect the austenite evolution during hot rolling. This is due to the differences in the size and volume fraction of TiN particles that can be formed. Fine TiN precipitates have been shown to be able to delay recrystallization kinetics. Moreover, the solute drag effect of Ti cannot be ignored in the case of hyperstoichiometric Ti/N ratios. It is observed that Nb-Ti grades tend to have lower non-recrystallization temperatures compared to Nb grades, which means that pancaking of the austenite is more difficult for these steels. The opposite is observed for the Nb-Mo grades, although in both cases the behavior is affected by the nominal content of Nb.
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[1] S. Vervynckt, K. Verbeken, B. Lopez and J. J. Jonas: Int. Mater. Rev., 2012, vol. 57, pp. 187-207.
[2] M.A. Altuna, A. Iza-Mendia and I. Gutierrez: Metall. Mater. Trans. A, 2012, vol. 43A, pp. 4571-4586.
[3] D.N. Crowther and W.B. Morrison: Titanium Technology in Microalloyed Steels, Institute of Materials, London, UK, 1997, pp. 44-64.
[4] M. Militzer, E.B. Hawbolt and T.R. Meadowcroft: Metall. Mater. Trans. A, 2000, vol. 31A, pp. 1247-1259.
[5] N. Isasti, D. Jorge-Badiola, M. L. Taheri and P. Uranga: Metall. Mater. Trans. A, 2014, vol. 45A, pp. 4960-4971.
[6] R. Lagneborg, T. Siwecki, S. Zajac and B. Hutchinson: Scand. J. Metall., 1999, vol. 28, pp. 186-241.
B. Bacroix, M. G. Akben and J.J. Jonas: Proc. of Microalloyed Austenite, P.J. Wray and A.J. DeArdo, eds., AIME, Warrendale, PA, 1982, pp. 293–318.
[8] W.B. Lee, S.G. Hong, C.G. Park, K.H. Kim and S.H. Park: Scripta Mater., 2000, vol. 43, pp. 319-324.
[9] M. G. Akben, B. Bacroix and J.J. Jonas: Acta Metall., 1983, vol. 31, pp. 161-174.
[10] B. Pereda, A. Fernandez, B. López and J.M. Rodriguez-Ibabe, ISIJ Int., 2007, vol. 47, pp. 860-868.
[11] M.G. Akben, I. Weiss and J.J. Jonas: Acta Metall., 1981, vol. 29, pp. 111-121.
[12] J.G. Speer and S.S. Hansen: Metall. Trans. A, 1989, vol. 20A, pp. 25-38.
[13] O. Kwon and A.J. DeArdo: Acta Metall. Mater., 1991, vol. 39, pp. 529-538.
[14] M. D. Kashif Rehman and H. S. Zurob: Metall. Mater. Trans. A, 2013, vol. 44A, pp. 1862-1871.
[15] P. Gong, E.J. Palmiere and W.M. Rainforth: Acta Mater., 2015, vol. 97, pp. 392–403.
J.M. Rodriguez-Ibabe, P. Uranga and B. López: J. Iron Steel Res. Int., 2011, vol. 18 (sup. 1), pp. 459-465.
[17] P. Uranga, A.I. Fernandez, B. Lopez and J.M. Rodriguez-Ibabe: Mater. Sci. Forum, 2005, vol. 500-501, pp. 245-252.
[18] F.B. Pickering: Titanium Technology in Microalloyed Steels, Institute of Materials, London, UK, 1997, pp. 10-43.
[19] M.A. Linaza, J.M. Rodriguez-Ibabe and J.J. Urcola: Fatigue Fract. Eng. Mater. Struct., 1997, vol. 20, pp. 619-632.
[20] D.P. Fairchild, D.G. Howden and W.A.T. Clark: Metall. Mater. Trans. A, 2000, vol. 31A, pp. 653-667.
[21] V. Descotes, S. Migot, F. Robaut, J-P. Bellot, V. Perrin-Guérin, S. Witzke and A. Jardyet: Metall. Mater. Trans. A, 2015, vol. 46A, pp. 2793-2795.
[22] P. Rocabois, J. Lehmann, H. Gaye and M. Wintz: J. Cryst. Growth, 1999, vol. 198/199, pp. 838-843.
J. Stock, C.M. Enloe, R.J. O`Malley, K.O. Findley and J.G. Speer: Iron & Steel Technol., 2014, vol. 11 (June), pp. 180-186.
A. M. Sage, R. C. Cochrane, D. Howse: Proc. Intern. Conf. on Processing, Microstructure and Properties of Microalloyed and other Modern HSLA Steels, Pittsburgh, PA, USA, 1992, pp. 443–60.
V. Leroy and J.C. Herman: Microalloying 95 Conference Proceedings, 1995, pp. 213–23.
[26] M. Arribas, B. López and J.M. Rodriguez-Ibabe: Mater. Sci. Eng. A, 2008, vol. 485, pp. 383-394.
[27] H. Luo, L.P. Karjalainen, D.A. Porter, H-M. Liimatainen and Y. Zhang: ISIJ Int., 2002, vol. 42, pp. 273-282.
[28] M. T. Nagata, J. G. Speer and D. K. Matlock: Metall. Mater. Trans. A, 2002, vol. 33A, pp. 3099-3110.
[29] M. Bai, D. Liu, Y. Lou, X. Mao, L. Li and X. Huo: J. Univ. Science Technol. Beijing, 2006, vol. 13, pp. 230-234.
L. A. Leduc and C. M. Sellars: Proc. Int. Conference on Thermomechanical Processing of Microalloyed Austenite, Pittsburgh, PA, USA, 1982, pp. 641–54.
[31] M.I. Vega, S. F. Medina, A. Quispe, M. Gómez and P.P. Gómez: Mater. Sci. Eng. A, 2006, vol. 423, pp. 253-261.
[32] W. Roberts, A. Sandberg, T. Siwecki and T. Werlefors: HSLA Steels. Technology and Applications, ASM, Ohio, PA, USA, 1984, pp. 67-84.
K. Kunishige and N. Nagao: ISIJ Int., 1989, vol. 29, pp. 940-946.
[34] A.I. Fernández, P. Uranga, B. López and J.M. Rodriguez-Ibabe: ISIJ Int., 2000, vol. 40, pp. 893-901.
[35] Z. Aretxabaleta, B. Pereda and B. López: Mater. Sci. Eng. A, 2014, vol. 600, pp. 37-46.
[36] P. Uranga, A. I. Fernández, B. López and J. M. Rodriguez-Ibabe: Thermomechanical Processing of Steels, Institute of Materials, London, 2000, vol. 1, pp. 204-213.
[37] B. Dutta, E. Valdes and C.M. Sellars: Acta Mater., 1992, vol. 40, pp. 653-662.
[38] E.J. Palmiere, C.I. Garcia and A.J. DeArdo: Metall. Trans. A, 1996, vol. 27A, pp. 951-960.
[39] Q.Y. Sha, D.A. Li and G.Y. Li: J. Iron Steel Research Int., 2014, vol. 21, pp. 232–239.
[40] Q.Y. Sha, Z.Q Sun and L.F. Li: Ironmaking Steelmaking, 2015, vol. 42, pp. 74-80.
[41] X. P. Mao, Q. L. Chen and X. J. Sun: J. Iron Steel Research Int., 2014, vol. 21, pp. 30-40.
[42] B. Pereda, B. López and J.M. Rodriguez-Ibabe: Mater. Sci. Forum, 2010, vol. 638-642, pp. 687-692.
[43] N. Isasti, B. Pereda, B. López, J.M. Rodriguez-Ibabe and P. Uranga: Fundamentals and applications of Mo and Nb Alloying in High Performance Steels, vol. 2, CBMM, IMOA and TMS, 2015, pp. 1-28.
[44] B. Dutta and C. M. Sellars: Mater. Sci. Technol., 1987, vol. 3, pp. 197-206.
[45] B. Pereda, J.M. Rodriguez-Ibabe and B. López: ISIJ Int., 2008, vol. 48, pp. 1457-1466.
[46] C. Klinkenberg, C. Bilgen, J.M. Rodriguez Ibabe, B. López and P. Uranga: Mater. Sci. Forum, 2012, vol. 706-709, pp. 2752-2757.
R. Abad, B. López and J.M. Rodriguez-Ibabe: J. Mater. Proc. Technol., 117/3, CD-ROM Section C4.
Ceit, unpublished work.
[49] S.G. Hong, K.B. Kang and C.G. Park: Scripta Mater., 2002, vol. 46, pp. 163-168.
[50] Y. Lee and B.C. De Cooman: ISIJ Int., 2014, vol. 54, pp. 893-899.
[51] Z. Wang, Q. Yong, X. Sun, Z. Yang, Z. Li, Ch. Zhang and Y. Weng: ISIJ Int., 2012, vol. 52, pp. 1661-1669.
[52] J-G. Jung, J-S. Park, J. Kim and Y-K. Lee: Mater. Sci. Eng. A, 2011, vol. 528, pp. 5529-5535.
B. Pereda, B. López and J.M. Rodriguez-Ibabe: Proc. Int. Conf. on Microalloyed Steels, AIST, Warrendale, USA, 2007, pp. 151–59.
B. Pereda, Doctoral Thesis, University of Navarra, 2009.
[55] S-Q. Yuan, G-L. Liang and X-J. Guo: J. Iron Steel Research Int., 2010, vol. 17, pp. 60-63.
[56] C.M. Enloe, K.O. Findley, C.M. Parish, M.K. Miller, B.C. De Cooman and J.G. Speer: Scripta Mater., 2013, vol. 68, pp. 55–58.
C-P. Reip, M. Frommert and M. Reifferscheid: Baosteel BAC Conference, 2013, J-47.
[58] M. Olasolo, P. Uranga, J.M. Rodriguez Ibabe, B. López: Mater. Sci. Eng. A, 2011, vol. 528, pp. 2559-2569.
[59] N. Isasti, D. Jorge-Badiola, M. L. Taheri, B. López and P. Uranga: Metall. Mater. Trans. A, 2011, vol. 42A, pp. 3729-3742.
[60] N. Isasti, D. Jorge-Badiola, M. L. Taheri and P. Uranga: Metall. Mater. Trans. A, 2014, vol. 45A, pp. 4972-4982.
[61] P. Cizek, B.P. Wynne, C.H.J. Davies and P.D. Hodgson: Metall. Mater. Trans. A, 2015, vol. 46A, pp. 407-425.
[62] K. Kamibayashi, Y. Tanabe, Y. Takemoto, I. Shimizu and T. Senuma: ISIJ Int., 2012, vol. 52, pp. 151–157.
[63] A. Ray, S. Sivaprasad and D. Chakrabarti: Int. J. Fract., 2012, vol. 173, pp. 215-222.
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Partial financial support of this work by the Basque Government (Elkartek KK-2015/00049 project) is gratefully acknowledged.
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López, B., Rodriguez-Ibabe, J.M. Some Metallurgical Issues Concerning Austenite Conditioning in Nb-Ti and Nb-Mo Microalloyed Steels Processed by Near-Net-Shape Casting and Direct Rolling Technologies. Metall Mater Trans A 48, 2801–2811 (2017). https://doi.org/10.1007/s11661-016-3727-9
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DOI: https://doi.org/10.1007/s11661-016-3727-9