Abstract
The effects of the addition of Zinc (0.3-2%) on the mechanical properties of Al-Si(5%)-Mg(0.3-1.0%) alloys were investigated and the following results were obtained.(1) Al-Si(5%)-Mg(0.8%)-Zn(1-2%) alloy was solution heat treated at 550°C for 3hr. and tempered at 150°C for 30hr. Then, the tensile strength was 37kg/mm2 in sand casting or 39kg/mm2 in metallic mold casting.(2) Al-Si(5%)-Mg(0.8%)-Zn(1-2%) alloy was solution heat treated at 550°C for 10hr. and tempered at 150°C for 20hr. Then, the tensile strength was 40kg/mm2 in metallic mold casting.
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