Simulación numérica del proceso de solidificación de la fundición dúctil

PATRICIA M. DARDATI; DIEGO J. CELENTANO; LUIS A. GODOY; ROBERTO E. BOERI

Parana

Congreso; MECOM - Parana; 2002

AMCA

This paper reports on a thermo-micro structural model for the simulation of the process of solidification of an eutectic ductile cast iron. The thermal balance is written at a macroscopic level and takes into account both the structural component being cast and its mold. The resulting formulation is solved using the finite element method. Models of nucleation and growth represent the evolution of the microstructure, and the micro segregation of silicon is also considered. The numerical results are presented in terms of cooling curves and are compared with experimental values. Furthermore, the sensitivity of the model response with respect to changes in certain parameters, such as the cooling velocity and nucleation constants, are performed. The differences between experimental and computational values are discussed and ways to improve the computational model are suggested.