To provide a method for producing an aluminum alloy sheet by which an Al-Mg-Si series alloy sheet having a fine crystal grain structure can be produced without requiring a complicated treating process and severs control which was necessary in the conventional case and also more advantageously from the point of cost and to provide an aluminum alloy sheet obtainable by the same method.
This method includes a casting stage in which an aluminum alloy containing 0.60 to 1.50% Mg, 0.40 to 2.00% Si, ≤1.0% Cu, ≤0.30% Fe, and the balance Al with impurities is dissolved and is melted and cast so as to control the cooling rate at the time of solidification to ≥150°C/sec, a rolling stage in which the aluminum alloy material obtained by the casting stage is heated to the temperature range from the recovery temperature of the aluminum alloy to less than the recrystallization temperature and is rolled by a different circum ferential speed rolling mill to obtain an aluminum alloy sheet and a melting treating stage in which the aluminum alloy sheet is subjected to melting treatment. By this producing process, the Al-MgSi series alloy sheet having a fine crystal grain structure with the average crystal grain size of ≤10 μm is obtained.
| JPS63220903 | LUBRICATING METHOD FOR WARM ROLLING OF HIGH SILICON STEEL |
| WO/2011/071024 | MAGNESIUM ALLOY MATERIAL |
OHORI KOICHI
SKY ALUMINIUM
SUMITOMO LIGHT METAL IND
NIPPON LIGHT METAL CO
FURUKAWA ELECTRIC CO LTD
MITSUBISHI ALUMINIUM