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. 12, 2017
Filed:
Feb. 13, 2013
Applicant:
Aktiebolaget Skf, Gothenburg, SE;
Inventors:
Mohamed Sherif, Utrecht, NL;
John Beswick, Montfoort, NL;
Assignee:
AKTIEBOLAGET SKF, Gothenburg, SE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C22C 38/44 (2006.01); C22C 38/46 (2006.01); C21D 9/40 (2006.01); C23C 8/22 (2006.01); C21D 6/00 (2006.01); C22C 33/02 (2006.01); F16C 33/62 (2006.01); B22F 3/26 (2006.01); C23C 8/32 (2006.01); F16C 33/32 (2006.01); F16C 33/34 (2006.01);
U.S. Cl.
CPC ...
C22C 38/46 (2013.01); B22F 3/26 (2013.01); C21D 6/00 (2013.01); C21D 9/40 (2013.01); C22C 33/0278 (2013.01); C22C 38/44 (2013.01); C23C 8/22 (2013.01); C23C 8/32 (2013.01); F16C 33/62 (2013.01); F16C 33/32 (2013.01); F16C 33/34 (2013.01); F16C 2204/62 (2013.01); F16C 2223/12 (2013.01);
Abstract
A bearing steel composition contains 0.1 to 0.2 wt % C, 3.25 to 4.25 wt % Cr, 9.5 to 11.5 wt % Mo, 5.75 to 6.75 wt % W, 1.5 to 2.5 wt % V, and 2.5 to 3.5 wt % Ni. A bearing component, such as a rolling element, an inner race or outer race, is formed from the bearing steel composition, for example, by a powder metallurgical technique and then is subjected to a case hardening treatment. The bearing component may have a microstructure composed of martensite, retained austenite and at least one of carbides and/or carbonitrides. The carbon level at the surface of the bearing component may be 0.5 to 1.1 wt %.