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Effects of Zn Amounts on the Castability and Tensile Properties of Al-Zn-Mg-Cu Alloys for Die Casting  

Kim, Ki-Tae (Foundry Technology Center, Korea Institute of Industrial Technology)
Yang, Jae-Hak (Foundry Technology Center, Korea Institute of Industrial Technology)
Lim, Young-Suk (Foundry Technology Center, Korea Institute of Industrial Technology)
Publication Information
Journal of Korea Foundry Society / v.30, no.4, 2010 , pp. 137-141 More about this Journal
Abstract
The effects of Zn amounts on the castability and tensile properties of Al-Zn-Mg-Cu alloys were investigated for development of high strength die casting aluminium alloys. Al-Zn-Mg-Cu alloys with 3.5% Zn showed high cast cracking tendency and poor mold filling behaviour. Al-Zn-Mg-Cu alloys with 5wt% Zn and 7wt% Zn had the tensile strengths of 300~400MPa and the elongations of 2~18%. The effect of Zn on the tensile strength of Al-Zn-Mg-Cu alloys was insignificant, but Al-Zn-Mg-Cu alloy with high Zn amount had lower elongation.
Keywords
Al alloy; Die casting; High strength; Mold filling; Cast cracking;
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