The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 2013
Filed:
Apr. 11, 2007
David A. Tomes, Jr., Sparks, NV (US);
Gavin F. Wyatt-mair, Lafayette, CA (US);
David W. Timmons, Reno, NV (US);
Ali Unal, Export, PA (US);
David A. Tomes, Jr., Sparks, NV (US);
Gavin F. Wyatt-Mair, Lafayette, CA (US);
David W. Timmons, Reno, NV (US);
Ali Unal, Export, PA (US);
Alcoa Inc., Pittsburgh, PA (US);
Abstract
The present invention discloses a method of strip casting an aluminum alloy from immiscible liquids that yields a highly uniform structure of fine second phase particles. The results of the present invention are achieved by using a known casting process to cast the alloy into a thin strip at high speeds. In the method of the present invention, the casting speed is preferably in the region of about 50-300 feet per minute (fpm) and the thickness of the strip preferably smaller than 0.08-0.25 inches. Under these conditions, favorable results are achieved when droplets of the immiscible liquid phase nucleate in the liquid ahead of the solidification front established in the casting process. The droplets of the immiscible phase are engulfed by the rapidly moving freeze front into the space between the Secondary Dendrite Arms (SDA).