| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy for a casting with which a casting having a high temperature strength higher than that of the conventional one can be manufactured by reducing the size of crystallized products without using a powder metallurgy method and a die casting method. SOLUTION: The aluminum alloy for a casting comprises, by mass, 9.5 to 11.5% Si, 5.0 to 7.7% Cu, 3.5 to 5.5% Ni, 0.55 to 1.5% Mg, 0.003 to 0.1% P and 0.15 to 0.7% Fe, and, if required, further comprises at least one kind of metals selected from 0.005 to 0.3% Ti, 0.02 to 0.3% Zr, 0.02 to 0.3% V, 0.001 to 0.1% B and 0.1 to 0.7% Mn, and the balance substantially Al. The temperature range in a solid-liquid coexistent region on solidification is made narrow, and various crystallized products are almost simultaneously crystallized out, so that the crystallized products are uniformly and finely distributed, and a metallic structure in which anα-Al phase as a matrix is is finely parted is formed. Thus, its high temperature strength is improved. COPYRIGHT: (C)2004,JPO&NCIPI
|
