logo

For the Inventor, By the Inventor

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.:

US 9139887 B1

PDFFull Text
Date of Patent:
Sep. 22, 2015

Filed:

May. 24, 2011

Bearing steel and ingot material for bearing having excellent rolling contact fatigue life characteristics and method for manufacturing the same

Applicants:

Minoru Honjo, Tokyo, JP;

Kazukuni Hase, Tokyo, JP;

Tatsumi Kimura, Tokyo, JP;

Shinji Mitao, Tokyo, JP;

Inventors:

Minoru Honjo, Tokyo, JP;

Kazukuni Hase, Tokyo, JP;

Tatsumi Kimura, Tokyo, JP;

Shinji Mitao, Tokyo, JP;

Assignees:

JFE STEEL CORPORATION, Tokyo, JP;

NTN CORPORATION, Osaka, JP;

Attorney:

Oliff PLC

Primary Examiner:

Roy King

Assistant Examiner:

Jenny Wu

Int. Cl.
CPC ...
C21D 8/02 (2006.01); C21D 9/00 (2006.01); C22C 38/18 (2006.01); C21D 1/28 (2006.01); C21D 7/13 (2006.01); C21D 9/40 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/20 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/44 (2006.01);
U.S. Cl.
CPC ...
C21D 9/0068 (2013.01); C21D 1/28 (2013.01); C21D 7/13 (2013.01); C21D 9/00 (2013.01); C21D 9/40 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/18 (2013.01); C22C 38/20 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C22C 38/44 (2013.01);
Abstract

The present invention provides bearing steel, comprising a chemical composition including by mass %, C: 0.56%≦[% C]≦0.70%, Si: 0.15%≦[% Si]<0.50%, Mn: 0.60%≦[% Mn]≦1.50%, Cr: 0.50%≦[% Cr]≦1.10%, Mo: 0.05%≦[% Mo]≦0.5%, P: [% P]≦0.025%, S: [% S]≦0.025%, Al: 0.005%≦[% Al]≦0.500%, O: [% O]≦0.0015%, N: 0.0030%≦[% N]≦0.015%, and remainder as Fe and incidental impurities.

Find Patent Forward Citations

Honjo, Minoru. (2015). Bearing steel and ingot material for bearing having excellent rolling contact fatigue life characteristics and method for manufacturing the same (U.S. Patent No. 9139887). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9139887

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…