| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for a can barrel, which can be formed into a can barrel having excellent sticking resistance and can expansibility even if being thinned, by covering both sides of the aluminum alloy sheet with a protective layer made from resin, and to provide a method for manufacturing the same. <P>SOLUTION: The aluminum alloy sheet is manufactured by: producing an ingot by melting an aluminum alloy comprising, by mass, 1.6-6.0% Mg, less than 0.5% Mn, 0.05-0.5% Si, 0.1-0.5% Fe, 0.05-0.3% Cu and the balance Al with unavoidable impurities, and casting the melted alloy; homogenizing the ingot by heat-treating it once at 450°C or higher but lower than 550°C; subsequently hot-rolling the ingot at a total reduction ratio of 99.2% or more without cooling it; and cold-rolling the hot-rolled plate without annealing it. In the central part in the sheet thickness direction of a cross-section of the aluminum alloy sheet, intermetallic compounds with the maximum length of 1 μm or more occupy more than 0.3% but less than 1.3% by an area rate, and the number of intermetallic compounds with the maximum length of 11 μm or more is 100 pieces/mm<SP>2</SP>or less. <P>COPYRIGHT: (C)2011,JPO&INPIT |
