| 摘要 |
PURPOSE:To manufacture an Al alloy plate capable of super plastic deformation by subjecting an Al alloy ingot contg. specific amounts of Cu, Li, Zr and Ti to homogenizing treatment, thereafter to solution heat treatment if necessary, and successively to rolling with the specific draft rate. CONSTITUTION:The ingot of an Al alloy contg., by weight, 2.0-3.0% Cu, 1.0-3.0% Li, 0.05-0.2% Zr and 0.01-0.10% Ti is retained under heating for 1-50h at 450-540 deg.C and is subjected to homogenizing treatment. The ingot is successively subjected to solution heat treatment at >=460 deg.C if necessary, is thereafter cooled to 300-450 deg.C, is again retained for 1-50h, is subjected to depositing treatment and is cooled to 300-450 deg.C to start rolling. In the meanwhile, the rolling is one stopped to retain the ingot to the temp. for 1-50h. After that, the ingot is subjected to cold rolling at 300-450 deg.C once more at >=50% draft rate and is worked into a plate material having final plate thickness. The Al alloy plate having excellent super plastic characteristics can be obtd. |
