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:
Jul. 08, 1986
Filed:
Jul. 30, 1984
Chia-Ming Yen, West Bloomfield, MI (US);
Gerald S Cole, Franklin, MI (US);
Roman M Nowicki, Bloomfield Hills, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A method is disclosed for controlling the metallurgical structure of cast metals containing nonmetallic second phase structures. The method comprises (1) prior to making casting of the metal, determining a mathematical value associated with the rate of temperature change at liquidus recalescence and a value associated with the rate of temperature change at the eutectic arrest of a measured cooling curve for a sample of the metal melt; (2) comparing the determined values obtained with previously gathered values of the same type that have been correlated to known metallurgical structures; and (3) if the determined values are different than previously gathered values for a desired structure, add modifying and/or refining agents to promote a metallurgical structure change in the melt.