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:
May. 17, 1977
Filed:
Feb. 02, 1976
Charles A Stickels, Ann Arbor, MI (US);
Anthony T Anderson, Romulus, MI (US);
Adam M Janotik, Grosse Ile, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A method (and resulting product) for preparing bearing components is disclosed. Utilizing a low alloy steel shape containing carbon in the range of 0.6-1.5% and containing alloying ingredients in the range of 1-2% selected from the group consisting of Cr, Mn, Ni, Cu and Mo (and preferably the ingredients of SAE 52100 steel), the steel shape is subjected sequentially to a spheroidizing-anneal heat treatment, a rough forming treatment, and a hardening-heat treatment. Immediately prior to the hardening-heat treatment, a fine bainitic or preferably pearlitic microstructure is established having relatively thin carbide films at prior austenite grain boundaries. Austenitizing of said pearlitic or bainitic microstructure is carried out at a temperature in the range of 1625.degree.-1675.degree. F for a period of time preferably between 15 seconds and one-half hour, but operationally for a period of time as short as 5 seconds and as long as 1 hour.