Simulation of Line Annealing of Type 430 Ferritic Stainless Steel

Abstract:

The annealing behavior of cold rolled Type 430 ferritic stainless steel is the subject of this paper. The steel was cold rolled 79%, then heated at 6 °C/s to the soaking temperature of 841 °C, which is just below the Ae₁ temperature. During heating, specimens were quenched from selected temperatures between 650 and 841 °C and after various times at 841 °C. These quenched samples underwent metallographic examination and micro-hardness determination. The results indicated that under the prevailing experimental conditions, the hardness appeared to correlate strongly with the extent of recrystallization. The kinetics of recrystallization appeared to originate in the cold worked state, where three kinds of grain were found: (i) smooth elongated, featureless of α-fiber orientation {001}<100>; (ii) irregular fishbone grains of the γ-fiber orientations {111}<112> plus {111}<110>; and (iii) twisted grains of the η-fiber orientation {001}<100>. It was found that the twisted grains of the η-fiber were the first to recrystallize, with the fishbone grains of the γ-fiber second, and the smooth elongated, featureless grains of the α-fiber last. It was found that the grains of the α-fiber orientation {001}<100> and the η-fiber orientation {001}<100> were replaced with grains of the γ-fiber orientations as recrystallization progressed. These results are discussed in terms of recrystallization and texture development.

• Periodical: Materials Science Forum (Volumes 715-716)
• Pages: 437-446
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.715-716.437
• Online since: April 2012
• Authors: Anna P. Kisko, Pasi P. Suikkanen, C. Isaac Garcia, K. Cho, M. Hua, L. Pentti Karjalainen, Anthony J. DeArdo
• Keywords: Ferritic Stainless Steel (FSS), IQ-Analyses, Recrystallization Texture, SEM-EBSD

References

[1] R.H. Goodenow: Trans. ASM, Vol. 59 (1966), p.804.

[2] K. Honda, H. Masunoto and S. Kaya: Sci. Rep. Tohoku Imp. Univ., Vol. 17 (1928), p.11.

[3] J. Hirsch and K. Lucke: Acta Metall., Vol. 36 (1988), p.2863.

[4] F.J. Humphreys and M. Hatherly: Recrystallization and Related Annealing Phenomena, (Pergamon, U.K. 2004).

[5] F. Emren, U. von Schlippenback and K. Lucke: Acta Metall., Vol. 34 (1986), p.2105.

[6] M.P. Renavikar, P.J. Wray, C.I. Garcia and A.J. DeArdo, in: Proceedings of 43rd Mech. Working and Steel Proc. Conf., Iron Steel Soc., Warrendale, PA (2001), p.211.

[7] J. Wu, P.J. Wray, C.I. Garcia, M. Hua and A. J. DeArdo: ISIJ Int., Vol. 45 (2005), p.254.

[8] D. Vanderschueren, N. Yoshinaga and K. Koyama: ISIJ Int., Vol. 36 (1996), p.1046.