Abstract
In these days, solidification simulation has come to be applied in order to set up faster and proper casting plan. However, there are still few cases where such simulation was applied to spheroidal graphite iron castings, and it is not easy to foresee the occurence of shrinkage cavities, because solidification process is complicated, involving expansion in addition to shrinkage.
As to fundamental castings, we measured actual temperature change of molten iron as well as mold in the course of solidification, which we repeatedly compared with temperature analysis obtained by simulation, and the propriety of solidification analysis basic date was examined. Further, with respect to the various plans for test castings, we tried to foresee the occurence of shrinkage cavities by two or three dimentional simulation. As a result, accurate data could be obtained on material properties, initial and boundary conditions required for solidification analysis related to the subject iron.
The result of temperature analysis by simulation based on such data was appoximate to the actual change of casting temperature. Also, it was recognized that the shrinkage cavities were predictable from solidification analysis contour.
