IDiyas

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 11781596 B1

PDFFull Text
Date of Patent:
Oct. 10, 2023

Filed:

Dec. 05, 2017

Bearing component and method for manufacturing the same

Applicant:

Ntn Corporation, Osaka, JP;

Inventors:

Hiroshi Yuki, Kuwana, JP;

Miyu Sato, Kuwana, JP;

Chikara Ohki, Kuwana, JP;

Assignee:

NTN CORPORATION, Osaka, JP;

Attorney:

McDermott Will & Emery LLP

Primary Examiner:

Jophy S Koshy

Int. Cl.
CPC ...
C21D 9/40 (2006.01); F16C 33/64 (2006.01); C21D 6/00 (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 33/58 (2006.01); F16C 33/62 (2006.01); C21D 1/25 (2006.01); C21D 1/42 (2006.01);
U.S. Cl.
CPC ...
F16C 33/64 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 9/40 (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); F16C 33/583 (2013.01); F16C 33/62 (2013.01); C21D 1/25 (2013.01); C21D 1/42 (2013.01); F16C 2204/66 (2013.01); F16C 2204/70 (2013.01); F16C 2223/10 (2013.01);
Abstract

In one aspect of the present invention, a method for manufacturing a bearing component includes: a preparation step of preparing a ring-shaped member of steel having a radially inner surface, a radially outer surface, and a thickness which is a distance between the radially inner surface and the radially outer surface; and a heat treatment step of performing a heat treatment to locally heat one of the radially inner surface and the radially outer surface to a heat treatment temperature and subsequently cool the one of the radially inner surface and the radially outer surface, the method satisfying S≥930/(0.3477 W−1.594 W−0.804), where S represents an average temperature increasing rate (unit: ° C./sec) applied when the surface is heated and W represents the thickness (unit: mm).

Find Patent Forward Citations

Loading…