PRODUCTION OF ALUMINUM ALLOY SHEET HAVING EXCELLENT CAN OPENABILITY
PURPOSE:To produce an Al alloy sheet as a cap material for beverage cans having excellent can openability by subjecting an ingot of an Al alloy contg. specific ratios of Mg, Mn and Fe to a homogenization heat treatment, then to hot rolling followed by an annealing treatment and cold rolling, thereby...
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Zusammenfassung: | PURPOSE:To produce an Al alloy sheet as a cap material for beverage cans having excellent can openability by subjecting an ingot of an Al alloy contg. specific ratios of Mg, Mn and Fe to a homogenization heat treatment, then to hot rolling followed by an annealing treatment and cold rolling, thereby working the ingot to a sheet material. CONSTITUTION:The ingot of the Al alloy having such compsn. As to contain, by weight %, 3.5-5.5% Mg, 0.5-0.9% Mn, and 0.7-1.1% Fe+Mn is subjected to the homogenization heat treatment at 450-550 deg.C then to hot rolling by which the ingot is worked to the sheet material at the time of producing the Al alloy sheet as the cap material having the excellent can openability for the can materials for beers and carbonated drinks. The material is in succession subjected to cold rolling or to intermediate annealing without being subjected to the cold rolling and is then subjected to the cold rolling at about |
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