PREPARATION OF Al-Si INGOTS WITH FULL EUTECTIC-LIKE MICROSTRUCTURE AT LOW COOLING RATE
PREPARATION　OF　Al－Si　INGOTS　WITH　FULL　EUTECTIC－LIKE　MICROSTRUCTURE　AT　LOW　COOLING　RATE

A self-designed computer-aided solidification simulation system for large-size ingots was employed to determine the eutectic coupled-zone of Al-(7-14 wt%) Si alloys at low freezing rate with a temperature gradient of liquid on solidification interface tower than 20 K cm~(-1). Experimental parameters for the formation of a fully eutectic microstructure in a dia.38×70 mm ingot have been successfully obtained under various conditions for Al-(11.3 -13.0 wt%) Si alloys.Eutectic coupled growth charactersitics under this condition was also discussed.