| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy casting as an alternative to a cast iron product by improving elongation characteristics by the reduction of Mg content and also improving rigidity. SOLUTION: An aluminum alloy, having a composition which consists of, by mass, 10.5 to 13.5% Si, 1.4 to 2.4% Ni, 4.0 to 5.0% Cu, 0.003 to 0.015% P and the balance Al with inevitable impurities and further contains, if necessary, one or more of 0.1 to 0.9% Mn, 0.1 to 0.9% Cr and 0.1 to 0.7% V or further contains, if necessary, 2.5 to 4.0% Ti and 1.0 to 2.0% B and in which Mg as an impurity is controlled to <0.2 mass% and further Fe as an impurity is controlled preferably to≤0.3 mass%, is used. This aluminum alloy is cast and then subjected to T5 or T6 treatment to obtain the aluminum alloy casting having≥80 GPa Young's modulus. COPYRIGHT: (C)2009,JPO&INPIT
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