Patent ID: 8409497
Filing Date: 2013-04-02
Classification: B22F,C22C,C22F

Abstract:
1. A method for forming a high strength aluminum alloy billet containing Ll 2 dispersoids, comprising the steps of: placing in a container a quantity of an aluminum alloy powder containing an Ll the alloy powder having a mesh size of less than 450 mesh in a container, vacuum degassing the powder at a temperature of about 300° F. (149° C.) to about 900° F. (482° C.) for about 0.5 hours to about 8 days; sealing the degassed powder in the container under vacuum; heating the sealed container at about 300° F. (149° C.) to about 900° F. (482° C.) for about 15 minutes to eight hours; vacuum hot pressing the heated container to form a billet; removing the container from the formed billet; extruding the billet into a rolling preform with a rectangular cross section; and rolling the preform into a useful shape, wherein the rolling is carried out after soaking the material at temperature from about 250° F. (121° C.) to about −900° F. (482° C.) for about 2 hours to 8 hours and include a plurality of passes wherein the rolling is carried out with an intermediate anneal after each pass at temperatures from about 250° F. (121° C.) to about 900° F. (482° C.) for about 0.25 hour to 1 hour.