Semi-solid ZL203 alloy billets were prepared by centrifugal and chilling device

and effects of different rotating speed

preheating temperature and pouring temperature on primary phase in the alloy were investigated.The results show that semi-solid aluminum alloy with spherical or granular primary grain can be prepared by centrifugal and chilling technology.Primary phase becomes finer with the increase of rotating speed

and its morphology is transformed from equiaxed dendrite into spherical or granular one.With the decrease of preheating temperature or pouring temperature

primary phase size is firstly decreased and then increased.