Modelling and experimental validation of SG cast iron solidification

Modelling and experimental validation of SG cast iron solidification for
different cooling rates
Alex A. Escobar*, José M. Catalán†, Diego J. Celentano†† and Marcela A. Cruchaga †
Avenida Vicuna Mackenna 1570, Santiago, Chile.
E-mail: [email protected]
Departamento de Ingeniería Micánica, Universidad de Santiago de Chile (USACH)
Av. Bdo. O’Higgins 3363 – Estación Central – Santiago de Chile - Chile
E-mail: [email protected]
Departamento de Ingeniería Mecánica y Metalúrgica, Pontificia Universidad Católica de Chile (PUC)
Av. Vicuña Mackenna 4860, Santiago, Chile.
E-mail: [email protected]
This work presents an experimental and numerical study of the solidification process of an
eutectic ductile cast iron [1]. The effect of the cooling rate on the thermal-microstructural response
is particularly analyzed. To this end, experiments as well as numerical simulations were carried
out. The experiments consisted in a solidification test in a cylindrical casting with different
diameters such that different cooling rates were measured at specific positions along the part. A
metallographic analysis was also performed in five locations of the sample with the aim of
obtaining the number and size of graphite nodules at the end of the process. The numerical
simulations were made using a 3D multinodular-based model. Good experimental-numerical
agreements have been obtained for both the cooling curves and the graphite nodule counts.
[1] Escobar, A., Celentano, D., Cruchaga, M., Lacaze, J., Schulz, B., Dardati, P., & Parada, A.
“Experimental and numerical analysis of effect of cooling rate on thermal-microstructural response of
spheroidal graphite cast iron solidification”. International Journal of Cast Metals Research, 27(3),
176-186 (2014).