| 摘要 |
<p>Provided are: an aluminum alloy plate for can ends, which is an aluminum alloy material suitable for can ends and has high strength, a small strength anisotropy and a low earing ratio; and a method for manufacturing the aluminum alloy plate at low cost. An ingot of an alloy is subjected to a homogenization treatment at 450 to 530˚C inclusive for 0.5 to 15 hours inclusive, and subsequently the homogenized ingot is subjected to a hot rolling procedure, wherein the alloy comprises, in mass%, 0.01 to 0.2% inclusive of Si, 0.01 to 0.35% inclusive of Fe, 0.01 to 0.15% inclusive of Cu, 0.2% or more and less than 0.5% of Mn, 4.0% or more and less than 5.5% of Mg and a remainder made up by Al and unavoidable impurities, and wherein the hot rolling is carried out in such a manner that the total rolling reduction ratio in the hot finish rolling becomes 88 to 94% inclusive, the strain rate during the final pass becomes 60 to 130 sec-1 inclusive and the finishing temperature becomes 310 to 370˚C inclusive. Subsequently, the resultant product is subjected to a cold rolling procedure at a cold rolling reduction ratio of 84 to 94% inclusive without carrying out annealing until the thickness of a final product reaches a final thickness, whereby the final product having the final thickness is produced.</p> |
