Influence of TiN Particles on Dynamic and Static Recrystallization in Microalloyed Steels

Abstract:

This work has studied the influence of different Ti and N compositions on hot deformation strength by determining the peak stress of flow curves and the activation energy (dynamic recrystallisation). It has also assessed their influence on static recrystallisation by means of the statically recrystallised fraction versus time and the activation energy. A precipitate study performed by SEM and TEM has yielded a better understanding of the influence of the Ti/N ratio and precipitation state in hot deformation (dynamic and static recrystallisation). A correlation was found between for the finer distribution of precipitates, Ti/N ratio close to 1.5, smaller austenite grain, maximum activation energy for hot deformation (dynamic recrystallisation) and maximum activation energy for static recrystallisation.

• Periodical: Materials Science Forum (Volumes 467-470)
• Pages: 1205-1210
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.467-470.1205
• Online since: October 2004
• Authors: S.F. Medina, M.I. Vega, Manuel Gómez
• Keywords: Dynamic Recrystallization (DRX), Energy Activation, Microalloyed Steel, Static Recrystallization

References

[1] E.T. Turkdogan: Iron Steelmaker, Vol. 3 (1989), p.61.

[2] K. Narita: Trans. Iron and Steel Inst. of Japan, Vol. 15 (1975), p.145.

[3] C.S. Smith: Trans. AIME, Vol. 175 (1948), p.15.

[4] T. Gladman: The Physical Metallurgy of Microalloyed Steels (The Institute of Materials, London 1997).

[5] P.E. Reynolds: ISIJ Int., Vol. 34 (1994), p.689.

[6] F.B. Pickering: Overview of Titanium Microalloyed Steels. Titanium Technology in Microalloyed Steels (The Institute of Materials, London 1997).

[7] R.L. Bodnar: Iron Steelmaker, Vol. 8 (1994), p.19.

[8] R. Priestner, C. Zhou and A. K Ibraheem: Precipitation in Cast Microalloyed Steel Containing Ti And Nb. Titanium Technology in Microalloyed Steels (The Institute of Materials, London 1997).

[9] S. F. Medina and J.E. Mancilla: Scripta. Metall. Mater, Vol. 30 (1994), pp.73-6 Title of Publication (to be inserted by the publisher).

[10] J.H. Beynon and C.M. Sellars: ISIJ International, Vol. 32 (1992), p.359.

[11] A. Faessel: Rev. Metall. CIT, Vol. 33 (1976), p.875.

[12] H.L. Andrade, M.G. Akben and J.J. Jonas: Metallurgical Transactions A, Vol. 14 A (1993), p. (1967).

[13] P.A. Manohar, D.P. Dunne, T. Chandra and C.R. Killmore: ISIJ International, Vol. 36 (1996), p.194.

[14] S.F. Medina and C. Hernandez: Acta Mater., Vol. 44 (1996), p.137.