Abstract
ABSTRACTThe heat transfer at the casting-mould interface in resin-bonded sand mould casting of Mg-Gd-Y-Zr alloy was investigated, in which plate-shaped castings with different thicknesses were produced and the temperature variation in the casting and sand mould was recorded. The heat flux and the interfacial heat transfer coefficient (IHTC) were determined by a verified inverse heat conduction model. The results showed that the peak value of the heat flux was about 34~68 kW/m2 and it approximately increased with the decrease of the casting thickness. The averaged heat flux in the solidification process increased from 25.4 kW/m2 to 42.4 kW/m2 when the casting thickness decreased from 35 mm to 10 mm. The IHTC increases rapidly after the liquid metal was poured into the mould, and then decreases for a while, followed by a gentle increase. The averaged IHTC in the solidification process is about 105~183 W/m2K.
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