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:
Sep. 20, 1988
Filed:
Aug. 05, 1981
Malachi P Kenney, Chesterfield, MO (US);
Alumax Inc., San Mateo, CA (US);
Abstract
A process for shaping a metal alloy in which a semi-solid metal alloy charge is shaped under pressure in a closed die cavity. The metal alloy is vigorously agitated, while in the form of a liquid-solid mixture, to convert from 30% to 55% by volume to discrete degenerate dendritic solid particles. The liquid-solid mixture is then cooled to solidify the mixture and reheated to form a semi-solid slurry. The reheated metal alloy slurry contains discrete degenerate dendritic primary solid particles, in a concentration from about 70 to 90% by volume based upon the volume of the alloy, suspended homogeneously in a secondary liquid phase. The process is characterized by low pressure and very rapid shaping and solidification times. The process produces complex, close tolerance, high quality metal alloy parts.