In order to improve and to optimize the performance of the equipment for the preparation of semi-solid slurry by melt spreading and mixing method

a series of experiments have been conducted to observe the effects of some processing parameters including melt temperature

degree of melt spreading

temperature of slurry-making chamber and melt injection on the microstructure of Al-6.56 Si alloy.The results reveal that the four factors have affected the under-cooling degree and temperature distribution of melt.The spheroidized fine microstructure with dispersive distribution can be prepared by controlling melt temperature less than 650 ℃ and rotating speed of spreading machine at 700

1

000 r/min as well as temperature of making-chamber less than 300 ℃ and melt injection at in range of 6 kg/min

1

2 kg/min.