| 摘要 |
PURPOSE:To obtain the Al foil excelling in foil rollability and having fine crystal grains by subjecting an Al alloy plate having a prescribed composition to primary annealing at the slow rate of heating and temp. rise, to cold rolling, and then to short-time secondary annealing at the rapid rate of heating and temp. rise. CONSTITUTION:The plate having a composition consisting of, by weight, 0.1-0.8% Fe, 0.003-0.1% Ti, and, as impurities, <=0.50% Si, <=0.10% Cu, <=0.10% Mn, <=0.05% Mg, and the balance Al with other inevitable impurities is used as starting material. The plate is subjected to primary annealing to be heated to 280-400 deg.C at <=100 deg.C/hr temp. rise rate and held there for 0.5-48hr, which is then cold-rolled at >=about 50% draft and is succeedingly subjected to secondary annealing to be heated to 280-425 deg.C at >=1 deg.C/sec temp. rise rate and held there for a short period of <=10min. In this way, the foil hardly causing occurrence of pin holes by foil rolling can be obtained.
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