A full diffusion model of the graphite eutectic grain growth in liquid cast iron under non-equilibrium conditions

• Autorzy: Kapturkiewicz, W. , Burbelko, A. A. , Górny, M.
• Języki publikacji: EN

Abstrakty

EN

An extension of the full diffusion 1-D model developed by Tanzili & Heckel has been presented which now allows for both temperature variations (responsible for an equilibrium interface concentration of constituents) as well as variations in the density of phases participating in the process of solidification. Under boundary conditions, the well-known possibility of the formation of a diffusive layer has been taken into consideration, but - compared to previous solutions that assumed a steady flow of constituent through this layer - a variability of this process has been allowed for now. In this situation, the extended model is approaching the state when it finally becomes possible to solve some problems of the casting solidification under real conditions. The developed model enabled obtaining a control balance of the alloying constituent content (carbon) with an error below 1%. The attempts to neglect the elements newly introduced to the model (different phase densities, different interface concentrations) resulted in an error of several dozen percent and more.

Słowa kluczowe

PL

krzepnięcie; modelowanie; żeliwo; dyfuzja

EN

solidification process; modelling; cast iron; diffusion

• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2009
• Tom: Vol. 9, iss. 1
• Strony: 107-112
• Opis fizyczny: Bibliogr. 8 poz., wykr.

Twórcy

autor

Kapturkiewicz, W.

autor

Burbelko, A. A.

autor

Górny, M.

• Faculty of Foundry Engineering, AGH University of Science and Technology, Reymonta 23, 30-059 Krakow, Poland,

Bibliografia

• [1] R. A. Tanzili, R. W. Heckel, Numerical solution to the finite, diffusion-controlled, two-phase, moving interface problem, Trans. Met. Soc. AIME, vol. 242 (1968) 2313-2321.
• [2] W. Kapturkiewicz, A. A. Burbelko, J. Lelito, E. Fraś: Modeling of ausferrite growth in ADI. Int. J. Cast Metals Res., vol. 16, No. 1-3 (2003) 287-292.
• [3] W. Kapturkiewicz, E. Fraś, A.A. Burbelko: Computer simulation of austenitizing process in cast iron with pearlitic matrix. Material Science and Engineering A 413-414 (2005) 352-357.
• [4] R. D. Lanam, R. W. Heckel, A study of the effect of an intermediate phase on the dissolution and homogenization characteristic of binary alloys, Metall. Trans, vol. 2 (1971), 2255-2265.
• [5] E. Fraś, W. Kapturkiewicz, A. A. Burbelko, H. F. Lopez, Modeling of graphitization kinetics in nodular cast iron casting. Modeling of Casting, Welding and Advanced Solidification Processes IX, Ed. P. Sahm, P. N.Hansen, J.G. Conley, Aachen, Shaker 2000, 885-892.
• [6] M. Rappaz, private communication, Lausanne 2000.
• [7] W. Kurz, D. J. Fisher, Fundamentals of solidification, Trans Tech Publ. LTD, Fourth Rev. Ed., Switzerland, Germany, UK, USA, 2005.
• [8] D. M. Stefanescu, Science and engineering of casting and solidification, Kluwer Academic/Plenum Publishers, 2002.