Mold Design for Reducing Shrinkage Porosity in Radially Symmetric Castings to Determine the Heat Transfer Coefficient in Permanent Mold Casting Using Simulation Software

The research team applied MAGMASOFT simulation software to design experimental molds to determine the heat transfer coefficient (HTC), a critical parameter in controlling the cooling rate of molten metal within the mold cavity during simulations. To ensure the castings were suitable for mechanical property testing, minimizing shrinkage porosity was essential. This study used casting simulation to analyze molten metal flow, solidification, and shrinkage porosity formation to identify and mitigate defects. Two heat transfer enhancement methods were implemented: adjusting the pouring temperature and incorporating chills. The results showed that shrinkage porosity was reduced from 5.63 to 1.68, though complete elimination was not achieved. Keywords: heat transfer coefficient (HTC), heat transfer, shrinkage porosity