Abstract
The sublattice-regular solution model has been adapted to describe the thermodynamics of complex carbonitrides. This model has been applied to titanium- and niobium-bearing microalloyed steels for calculation of the mole fraction and composition of the carbonitride precipitates and the residual solute levels in the austenite. Both experimental results and calculations show that titanium nitride predominantly forms at very high temperatures and titanium-niobium carbides go to completion at low temperatures. Quantitative agreement between the experimental measurements and the predictions for carbonitride compositions as a function of temperature is demonstrated.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
D.C. Houghton: National Research Council of Canada, Ottawa, unpublished research, 1991.
P.R. Rios:Mater. Sci. Eng. A, 1991, in press.
P.R. Rios:Mater. Sci. Technol., 1988, vol. 4, pp. 324–27.
M. Grujicic, I. Wang, and W.S. Owen:CALPHAD, 1986, vol. 10, pp. 117–28.
S.V. Subramanian, J.D. Embury, and G.R. Purdy:Int. Conf. on Pipe Technology, Rome, Italy, Nov. 17–18, 1987.
D.C. Houghton, G.C. Weatherly, and J.D. Embury: inThermomechanical Processing of Microalloyed Austenite, TMS-AIME, Warrendale, PA, 1981, pp. 267–92.
J.G. Speer, J.R. Michael, and S.S. Hansen:Metall. Trans. A, 1987, vol. 18A, pp. 211–22.
S. Suzuki, G.C. Weatherly, and D.C. Houghton:Acta Metall., 1987, vol. 35, pp. 341–52.
J. Strid and K.E. Easterling:Acta Metall., 1985, vol. 33, pp. 2057–74.
W.J. Liu and J.J. Jonas:Metall. Trans. A, 1989, vol. 20A, pp. 1361–74.
S.R. Keown and W.G. Wilson: inThermomechanical Processing of Microalloyed Austenite, TMS-AIME, Warrendale, PA, 1981, pp. 343–56.
H. Zou and J.S. Kirkaldy:Metall. Trans. A, 1991, vol. 22A, pp. 1511–24.
D.C. Houghton, G.C. Weatherly, and J.D. Embury: McMaster University, Hamilton, Ontario, unpublished research, 1981.
D.C. Houghton, G.C. Weatherly, and J.D. Embury:Advances in the Physical Metallurgy and Applications of Steels, Book 284, The Metals Society, London, 1982, pp. 136–46.
G. Ocampo: M. Eng. Thesis, McMaster University, Hamilton, Ontario, 1984.
M. Hillert and L.I. Staffansson:Acta Chem. Scand., 1970, vol. 24, pp. 3618–26.
T.H. Johansen, N. Christensen, and B. Augland:Trans. TMS-AIME, 1967, vol. 239, p. 1651.
R.P. Smith:Trans. TMS-AIME, 1966, vol. 236, pp. 220–21.
T. Sharaiwa, N. Fujino, and J. Murrayama:Trans. Iron Steel Inst. Jpn., 1970, vol. 10, p. 406.
K. Balasubramanian and J.S. Kirkaldy: McMaster University, Hamilton, Ontario, unpublished research, 1989.
W. Roberts and A. Sandberg: Swedish Institute for Metals Research Report No. IM-1489, Stockholm, 1980, p. 301.
M.C. Inman and H.R. Tipler:Metall. Rev., 1963, vol. 8, p. 134.
H. Zou and J.S. Kirkaldy:Can. Metall. Q., 1989, vol. 28, pp. 171–77.
H. Zou: Ph.D Thesis, McMaster University, Hamilton, Ontario, 1991.
H. Zou and J.S. Kirkaldy: McMaster University, Hamilton, Ontario, unpublished research, 1990.
Author information
Authors and Affiliations
Additional information
Formerly Research Associate, with the Institute for Materials Research, McMaster University Research Scientist
Rights and permissions
About this article
Cite this article
Zou, H., Kirkaldy, J.S. Thermodynamic calculation and experimental verification of the carbonitride-austenite equilibrium in Ti-Nb microalloyed steels. Metall Trans A 23, 651–657 (1992). https://doi.org/10.1007/BF02801182
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02801182