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:
Oct. 19, 1999
Filed:
Sep. 02, 1997
S Craig Bergsma, The Dalles, OR (US);
Northwest Aluminum, The Dalles, OR (US);
Abstract
A billet of an aluminum alloy for thermally transforming from a dendritic microstructure to a globular structure and for forming in a semi-solid condition into a shaped aluminum alloy article; the billet having a dendritic microstructure having a grain size in the range of 20 to 250 .mu.m provided by a solidification rate in the range of 5.degree. to 100.degree. C./sec between liquidus and solidus temperatures when the aluminum alloy is cast into billet; the billet having a dendritic microstructure thermally transformable to the globular structure or non-dendritic structure by heat applied to the billet at a heat-up rate greater than 30.degree. C. per minute to a superheated temperature of 3.degree. to 50.degree. C. above solidus temperature of the aluminum alloy; the billet in the globular structure or non-dendritic structure and in the semi-solid condition having the ability to be formed into the shaped aluminum article.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile