| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a new aluminum alloy which has excellent castability and workability, and further has excellent mechanical strength. Ž<P>SOLUTION: The high strength aluminum alloy comprises, by mass, 3.5 to 7.5% Si, 0.45 to 0.8% Mg and 0.05 to 0.35% Cr, and the balance Al with inevitable impurities; wherein the whole is defined as 100 mass%. In addition to the incorporation of a suitable amount of Mg in a range which exerts no adverse influence on ductility, so as to increase strength, by incorporating Cr together with Mg, the strength of the aluminum alloy remarkably improves. Further, Mg contributes to the fining of eutectic Si as well as the increase of the strength. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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