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:
Oct. 27, 1987
Filed:
Jul. 07, 1986
Applicant:
Inventors:
Assignees:
Aichi Steel Works, Ltd., Aichi, JP;
Koyo Seiko Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C21C / ;
U.S. Cl.
CPC ...
75 49 ; 75 1046 ;
Abstract
A high-quality bearing steel contains 0.70 to 1.10% by weight of C, 0.15 to 1.60% by weight of Si, 0.15 to 1.15% by weight of Mn, 0.010% by weight or less of P, 0.002% by weight or less of S, 0.50 to 1.60% by weight of Cr, 0.015% by weight or less of Al, 0.0050% by weight or less of N, 0.0006% by weight or less of O, 0.0015% by weight or less of Ti, and the remainder of Fe together with impurities. The steel can further contain 0.05 to 0.50% by weight of Mo or a member or members selected from a group consisting of 0.05 to 0.30% by weight of V and 0.05 to 0.30% by weight of Nb. The bearing steel has an excellent durability life and cold workability.