A method for manufacturing an aluminum alloy plate for beverage cans, which has excellent bottom moldability and bottom strength.

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of an aluminum alloy sheet for beverage can excellent in bottom moldability and bottom part strength.;SOLUTION: An aluminum alloy sheet having sheet thickness of 0.210 to 0.470 mm and bearing force after coating galling of 230 to 320 N/mm2 is provided by conducting CAL annealing with holding temperature of 300 to 540°C for 5 to 60 sec. once or two times by using a continuous annealing device in a process of cold rolling, and a final stabilization annealing under a condition of temperature increase rate of 3°C/min. or more, holding temperature of 120 to 140°C, holding time of 1 to 2 hr. and cooling rate of 10°C/min. or more after final cold rolling when an aluminum alloy sheet is manufactured through a homogenization process, a soaking treatment on an ingot obtained by smelting an aluminum alloy containing, by mass%, Si:0.35% or less, Fe:0.35 to 0.55%, Cu:0.15 to 0.48%, Mn:0.8 to 1.15%, Mg:0.60 to 1.60%, and semi-continuously casting the same; hot rough rolling; hot finish rolling and cold rolling.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2018,JPO&INPIT