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. 01, 1981
Filed:
Apr. 30, 1980
Shyam K Samanta, Ypsilanti, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A method is disclosed for removing stock from a metal part comprised of steel, malleable cast iron or nodular cast iron. A moving relationship is established between the part and a cutting tool formed of a substantially full dense hot pressed ceramic material consisting essentially of a generally uniform mixture of 50-70% by weight Al.sub.2 O.sub.3 and the remainder substantially Si.sub.3 N.sub.4. The tool is advanced into the surface of the part at a predetermined depth of cut and feed rate which results in the removal of stock from the part during periods of relative movement. A portion of the Al.sub.2 O.sub.3 may be replaced by up to 15% stabilized ZrO.sub.2 or HfO.sub.2 to further improve strength at higher temperatures.