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:
Nov. 08, 2016
Filed:
Jan. 12, 2012
Applicants:
Hiroshi Yuki, Kuwana, JP;
Chikara Ohki, Kuwana, JP;
Kazuhiro Yagita, Kuwana, JP;
Inventors:
Assignee:
NTN CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 9/40 (2006.01); F16C 33/64 (2006.01); C21D 1/10 (2006.01); C21D 1/28 (2006.01); C21D 1/30 (2006.01); C22C 38/00 (2006.01); F16C 23/08 (2006.01); C21D 1/18 (2006.01); C21D 1/19 (2006.01);
U.S. Cl.
CPC ...
C21D 9/40 (2013.01); C21D 1/10 (2013.01); C21D 1/18 (2013.01); C21D 1/19 (2013.01); C21D 1/28 (2013.01); C21D 1/30 (2013.01); C22C 38/00 (2013.01); F16C 23/086 (2013.01); F16C 33/64 (2013.01); C21D 2211/00 (2013.01); C21D 2211/004 (2013.01); C21D 2211/008 (2013.01); C21D 2221/00 (2013.01); C21D 2221/10 (2013.01); F16C 2202/04 (2013.01); F16C 2204/66 (2013.01); F16C 2204/70 (2013.01); F16C 2204/74 (2013.01); F16C 2300/14 (2013.01); Y02P 10/253 (2015.11); Y10T 29/49689 (2015.01);
Abstract
A method for producing a bearing ring of a rolling bearing includes the steps of: preparing a formed body constituted of hypereutectoid steel; forming an annular heated region heated to a temperature of at least an Apoint on the formed body by relatively rotating an induction heating member arranged to face part of an annular region for becoming a rolling contact surface of the bearing ring in the formed body to induction-heat the formed body along the circumferential direction of the annular region; and simultaneously cooling the whole of the heated region to a temperature of not more than an Mpoint.