| 摘要 |
PURPOSE:To manufacture an Al alloy for forming excellent in strength and elongation percentage, by subjecting an alloy ingot having a specific composition consisting of Si, Fe, Cu, Mg, Zn, Ti, and Al to specific homogenizing treatment and solution heat treatment. CONSTITUTION:The alloy ingot consisting of 0.5-2.0% Si, 0.01-0.5% Fe, 0.05-1.5% Cu, 0.1-1.5% Mg, 0.5-2.5% Zn, 0.001-0.2% Ti, and the balance Al is subjected to homogenizing treatment at 400-590 deg.C to undergo refining of crystallized phase. Subsequently, the ingot after the homogenizing treatment is hot-rolled and cold-rolled. After that, the rolled sheet formed to the thickness of product size is subjected to solution heat treatment at 450-590 deg.C, so that a fine and uniform precipitated phase is formed. In this way, the Al alloy for forming having high strength and ductility, excellent in workability, and also excellent in yield strength value in a product can be obtained.
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