Title: Modelling of microstructure in steel continuous casting: overview and presentation of the IDS tool

Authors: Jyrki Miettinen, Seppo Louhenkilpi, Heli Kytonen, Jukka Laine, Shenqiang Wang, Tenho Hatonen, Marko Petajajarvi, Paavo Hooli

Addresses: Helsinki University of Technology, Laboratory of Metallurgy, P.O. Box 6200, 02015 TKK, Espoo, Finland. ' Helsinki University of Technology, Laboratory of Metallurgy, P.O. Box 6200, 02015 TKK, Espoo, Finland. ' Helsinki University of Technology, Laboratory of Metallurgy, P.O. Box 6200, 02015 TKK, Espoo, Finland. ' Helsinki University of Technology, Laboratory of Metallurgy, P.O. Box 6200, 02015 TKK, Espoo, Finland. ' Helsinki University of Technology, Laboratory of Metallurgy, P.O. Box 6200, 02015 TKK, Espoo, Finland. ' Ovako Bar, Imatra Steel Works, Imatra, Finland. ' Outokumpu Stainless, Tornio Works Tornio, Finland. ' Outokumpu Stainless, Tornio Works Tornio, Finland

Abstract: IDS is a thermodynamic-kinetic tool for simulation of solidification phenomena and phase transformations in steels, from liquid down to room temperature. IDS calculates important thermophysical material properties (enthalpy, thermal conductivity, density, etc.). The model takes into account the effect of solutes C, Si, Mn, P, S, Cr, Mo, Ni, Cu, Al, N, Nb, Ti, V, Ca, B, O, H, cooling rate and dendrite arm diameter. The model has been developed at Helsinki University of Technology, Finland, since 1984. In addition, IDS is coupled with ChemApp (GTT-Technologies, Germany) to simulate multiphase inclusions during solidification. This paper summarises the features of the model including the future plans. Case calculations of continuous casting, heat treatment and inclusion formation are presented.

Keywords: solidification; simulation; continuous casting; phase transformations; microstructure; material properties; austenite decomposition; multiphase inclusions; steel; thermodynamics; kinetics; modelling; heat treatment.

DOI: 10.1504/IJMMS.2010.029868

International Journal of Mechatronics and Manufacturing Systems, 2010 Vol.3 No.1/2, pp.25 - 43

Available online: 02 Dec 2009 *

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