Patent ID: 6627010
Filing Date: 2003-09-30
Classification: C22F

Abstract:
A method for producing an alloy from an aluminum eutectic alloy system, in order to form a workpiece, which comprises, prior to any rolling, extrusion or other working of the alloy, casting and cooling an aluminum alloy melt to form a workpiece, homogenizing and cooling the alloy in the workpiece, heating the workpiece to a temperature in the alloy above the solubility temperature of the precipitated phases in the alloy matrix, keeping the workpiece at the temperature above the solubility temperature of the precipitated phases in the matrix until the phases have dissolved, cooling the workpiece to the desired processing temperature at a cooling rate greater than 400Â° C./h and less than 55,000Â° C./h which is rapid enough to avoid most of the precipitation of the said phases and slow enough to avoid most of the precipitation of dispersoid particles.