| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for casting an aluminum alloy where solution treatment and quenching can be made needless. SOLUTION: At the time when a molten metal composed of an aluminum alloy is poured into the cavity of a molding mold and is cooled, so as to discharge a cast product from the molding mold, as the aluminum alloy, an aluminum alloy where, in its phase diagram, a solid solution component(s) allowed to enter into solid solution inαcrystals composed of aluminum forming a solid phase region near pure aluminum is added by≥5 wt.% to pure aluminum, and the addition amount of the solid solution component(s) lies in the range corresponding to the solid solution degree line forming the boundary of theαcrystal region composed of theαcrystals and the eutectic region in which theαcrystals andβcrystals composed of the solid solution component(s) are made eutectic is used, and the cooling rate of the molten metal charged into the molding mold is controlled to≥800°C/min. COPYRIGHT: (C)2006,JPO&NCIPI
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