The empirical relationships between thermal expansion, temperature and time are employed in numerical modeling of the volume change of one-dimensional cylindrical castings of spheroidal graphite (SG) iron and green sand molds. The simulation results of this research are in close agreement with published experimental data. It is confirmed that thermal expansion of mold materials is the main contributor to the difference between the theoretical prediction and the experimental observation for the volume change during solidification of SG iron. Other factors influencing expansion of sand molds are also discussed.
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