ALUMINUM ALLOY CASTING MATERIAL, METHOD FOR PRODUCTION OF THE ALUMINUM ALLOY CASTING MATERIAL, ALUMINUM ALLOY MATERIAL, AND METHOD FOR PRODUCTION OF ALUMINUM ALLOY MATERIAL

摘要

A casted aluminum alloy obtained by casting a molten metal of an aluminum alloy, an aluminum alloy material obtained by at least heating the casted aluminum alloy, and methods for producing them. In the production of the casted aluminum alloy, a molten metal is obtained by melting an aluminum alloy containing 0.8 to 5 mass% of Fe, 0.15 to 1 mass% of Ti, Zr or the like as third component elements in an specific amount, and a residual part containing Al and inevitable impurities at a certain temperature (melting step). Subsequently, the molten metal is cast into a plate-like shape by a casting mold while cooling the molten metal to a temperature that is lower by at least 10°C than a solidus temperature of the aluminum alloy at a cooling rate of 150°C/sec. or more and less than 10000°C/sec. (casting step).