Influence of teeming temperature of molten tin in centrifugal casting

摘要

During centrifugal casting, when a mould is rotated at very low and very high speeds, defects are found in the final castings. Obtaining the critical speed for sound castings should not be a matter of guess or based on experience. The defects in the casting are mainly due to the behaviour of the molten metal during teeming and solidification process. The studies of melt flow in partially filled rotating cylinders have indicated many features, which were not mentioned in the literatures of centrifugal casting. Motion of molten metal at various speeds and its effect during casting are addressed in this paper. Molten tin has been taken for the experiments, and its behaviour during various rotational speeds is explained.