Title:
EFFECT OF CHILLS ON SAND CASTING OF ALUMINIUM ALLOY

Authors:
A. S. Lawal and A. Awogbemi

Abstract:
This study investigated the effect of chill in the sand casting of aluminum alloy. Eight cylindrical rods of dimension 7.5mm × 40mm and a four-disc shape sample were cast using a sand mold. Alumina Oxide, Iron filling, and Zinc chills were stirred into the melt of three sand molds and the last sample was left unchilled. The investigation involved testing of mechanical properties and metallographic analysis of cast samples. The results revealed that the sample chilled with zinc has the highest mechanical properties but the lowest wear resistance (Tensile strength of 155.23312MPa, hardness of 50.24559BHN). Also, the sample chilled with alumina oxide revealed an evenly distributed microstructure due to its unique properties and highest wear resistance. The iron filling chill sample displayed very close mechanical properties with the sample without chill (Tensile strength of 133.56225MPa, hardness of 43.18315BHN) (Tensile strength 133.85680Mpa, hardness of 42.94031BHN).

Keywords:
casting, sand mould, mechanical properties, hardness, tensile strength

DOI:
https://doi.org/10.52267/IJASER.2024.5307