Abstract
With the introduction of dual phase steels, it is increasingly becoming important to obtain a thorough understanding of intercritical austenitization phenomena. Quantitative microscopy techniques were used to study the process of intercritical austenitization (740°C) of two Fe-Mn-C steels, one of them being microalloyed with Nb. The two steels showed essentially the same kinetics,viz., three stages of intercritical austenitization: (i) austenite growth into pearlite until complete pearlite dissolution, (ii) growth of austenite into ferrite, and (iii) equilibration of ferrite and austenite. However, compared to data published by other researchers, the maximum amount of austenite, in our case, was reached much faster. Ferrite-ferrite interface processes and preferred nucleation at particles in the ferrite boundaries accelerated the austenite growth. Austenite growth out of pearlite colonies was asymmetric due to the fast ferrite-ferrite interface processes.
Similar content being viewed by others
References
P. E. Repas: inDual Phase and Cold Pressing Vanadium Steels in the Automobile Industry, VANITEC, London, 1978, pp. 13–22.
C. I. Garcia and A. J. DeArdo: inStructures and Properties of Dual Phase HSLA Steels, R.A. Kot and J.W. Morris, eds., TMS-AIME, New York, NY, 1979, pp. 145–82.
R. D. Lawson, B.K. Matlock, and G. Krauss:Metallography, 1980, vol. 13, pp. 71–87.
C. I. Garcia and A.J. DeArdo:Metall. Trans. A, 1981, vol. 12A, pp. 521–30.
G. R. Speich, U.A. Demarest, and R. L. Miller:Metall. Trans. A, 1981, vol. 12A, pp. 1419–28.
E. E. Underwood: inMetals Handbook, ASM, Metals Park, OH, 1973, vol. 8, pp. 37–47.
F. S.La Pera,Journal of Metals, March 1980, vol. 32, pp. 38, 39.
D. P. Datta and A.M. Gokhale:Metall. Trans. A, 1981, vol. 12A, pp. 443–50.
C.W. Haynes and R. Smoluchowski:Acta Met., 1975, vol. 3, pp. 130–34.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Souza, M.M., Guimarães, J.R.C. & Chawla, K.K. Intercritical Austenitization of Two Fe-Mn-C Steels. Metall Trans A 13, 575–579 (1982). https://doi.org/10.1007/BF02644421
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02644421