Kuo J H, Hsu F L, Hwang W S, Yeh J L, Chen S J

Abstract: In this study, the heat transfer coefficients h, at the interface between A356 aluminum alloy casting and metallic mold with various coatings are measured. Two types of metallic mold; SKD-61 and FCD-500, two different coating materials; Dycote-39 (insulating type) and AL-130 (lubricating type), and three coating thickness for each mold/casting combination are investigated. A unidirectional heat transfer system for the metallic mold casting of A356 aluminum alloy is first designed and fabricated. The designed system has the flexibility of testing different types of metallic mold, mold coolant, coating material, and coating thickness. Temperature measurements are then conducted with the thermocouples aligned in the casting and the metallic mold. Subsequently, the Inverse Method is employed to analyze the measured temperature and obtain the interfacial heat transfer coefficient.

Keywords: Casting, Mold coating, Mold material, Heat transfer coefficient.