Patent ID: 8025093
Filing Date: 2011-09-27
Classification: B22D,C22C

Abstract:
1. A method of manufacturing aluminum alloy cast plate substantially without voids, comprising the steps of: arranging twin cooled casting rolls having diameters D (m) to have a spacing of d (m) between kiss points of the casting rolls; supplying a molten Al—Mg series alloy including Mg in an amount of from 3% by mass or more to 14% by mass or less to the casting rolls; rotating the casting rolls at a circumferential velocity v (m), whereby the molten alloy is solidified to form a cast plate of thickness d, without internal defects, over a solidification distance s equal to the circumferential length of the rolls starting from where molten alloy first touches the twin rolls up to the kiss points; and controlling v, D, s and d such that: v/D<0.3 per second, and >250 seconds per meter.