MANUFACTUE OF ALUMINUM ALLOY PLATE WITH BRIGHTENING PROPERTY FOR ALUMITE AND SUPERIOR DIRECTIONAL PROPERTY

摘要

PURPOSE:To manufacture the titled Al alloy plate with superior deep-drawability, etc. by homogenizing an Al alloy contg. Cu, Si, Fe, Mg and Ti and/or B followed by hot-rolling to a prescribed thickness at a prescribed rolling finish temp., cold rolling and finish annealing at a relatively high temp. CONSTITUTION:An Al alloy contg. 0.05-0.15% Cu, =0.1 Si, 0.15-0.25% Fe, 0.2-0.3% Mg and =0.1% Ti and/or =0.01% B is homogenized at 480-540 deg.C to form deposits with the optimum size and distribution. The homogenized Al alloy is hot-rolled to 3-7mm. thickness at =270 deg.C rolling finish temp., cold-rolled at =50% reduction ratio, and finish-annealed at 360- 420 deg.C to manufacture an Al alloy plate with brightening properties for alumite and superior directional properties.