To provide a method for producing an aluminum alloy sheet material which has excellent barrel cutting resistance.
An aluminum alloy ingot is subjected to homogenizing treatment. In a hot rolling stage, the temperature of a coil after the hot rolling is controlled to 400 to 500°C, and the recrystallization rate of the coil is controlled to 70 to 100%. The coil is cold-rolled, and is annealed in a first process annealing stage. The coil is cold-rolled at a draft in the range of 10 to 25% in a second cold rolling stage, and is annealed in a second process annealing stage. In a final cold rolling stage, cold rolling is performed for one pass so that the draft is controlled in the range of 45 to 70%, and the temperature of the coil on coiling after the cold rolling is controlled to 90 to 140°C. After the completion of the coiling, the coil is held to <90°C for 1 to 10 hr.
SAITO MITSURU
HARADA TOSHIHIRO
OHORI KOICHI
