MEASURING FEEDING IN ALUMINIUM ALLOYS

摘要

A method to measure feeding in a casting during solidification has been developed. The casting is a plate with a feeder in one end and a chill at the other. Characterization of the apparatus shows that the isotherms are nearly planar, moving from the chill to the feeder. The weight of the plate is measured with high resolution during solidification. By this method one can register the mass flow of molten metal from the feeder into the solidifying plate. The apparatus is well suited to study feeding in different alloys. The simple geometry is easy to model. Results from feeding experiments with various binary Al-Si alloys are presented and compared to a model that assumes 100% feeding of solidification shrinkage.