Based on studying the technical properties of zircon sand and PEPSET nobake sand

the effect of zircon nobake sand on properties of aluminium casting is studied. In the zircon and silica nobake sand

the cylinder head of autombile engine 462 was poured and the experiment data was processed by computer. The experimental results have proved that zircon nobake sand is able to well chill aluminium casting in its solidification process

and the spaces between branch crystals are remarkably decreased. The method of pouring aluminium alloy casting with zircon nobake sand can improve the microstructure and properties of casting.