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:
Apr. 18, 2017
Filed:
Mar. 05, 2013
Applicant:
Kobe Steel, Ltd., Kobe-shi, JP;
Inventors:
Assignee:
Kobe Steel, Ltd., Kobe-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D 6/00 (2006.01); C21D 9/00 (2006.01); C21D 9/40 (2006.01); C21D 1/32 (2006.01); C22C 38/50 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); F16C 33/64 (2006.01); F16C 33/62 (2006.01);
U.S. Cl.
CPC ...
C21D 9/00 (2013.01); C21D 1/32 (2013.01); C21D 6/00 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 9/40 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/50 (2013.01); C21D 2201/00 (2013.01); F16C 33/62 (2013.01); F16C 33/64 (2013.01);
Abstract
A bearing component having increased rolling-contact fatigue life, the bearing component being made of a bearing steel that satisfies a predetermined chemical composition, and Si (boundary Si), Mn (boundary Mn), Cr (boundary Cr), Cu (boundary Cu), Ni (boundary Ni), and Mo (boundary Mo) included in a matrix phase region (boundary surface region) from the surface of spheroidized cementite to 20 nm away satisfy the formula:9.0≦1.4×boundary Si+1.8×boundary Mn+5.5×boundary Cu+4.2×boundary Ni+4.8×boundary Cr+5.5×boundary Mo.