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:
Jan. 07, 2003
Filed:
Apr. 18, 2000
Samuel B. Williams, Bloomfield Hills, MI (US);
Timothy A. Nielsen, Walled Lake, MI (US);
Williams International Co., L.L.C., Walled Lake, MI (US);
Abstract
Methods for semisolid manufacturing of precision parts, turbine rotors for example, comprised of a plurality of high melting point alloys are given. Generally, a semisolid/thixotropic process is operated under vacuum utilizing a cooled mold. The process preferably comprises a vacuum chamber, inductive heaters to bring two or more high melting point slugs to either a solid or thixotropic phase, and a plunger that accelerates one or more high melting point solid slugs into one or more thixotropic slugs and then into a mold. Prior to heating, preconditioning at least one of the slugs to form a non-dendritic microstructure simplifies processing. The semisolid microstructure solidifies as the completed forged assembly cools. Thixotropic forging of a multi-alloy assembly achieves optimized properties in specific locations of the final product.