Title:
RACEWAY MEMBER, ROLLING BEARING, BEARING RING FOR ROLLING BEARING, AND METHOD FOR MANUFACTURING BEARING RING FOR ROLLING BEARING
Document Type and Number:
WIPO Patent Application WO/2021/100746
Kind Code:
A1
Abstract:
An inner ring (12) is made from a steel and has an inner ring raceway surface (12A) that extends along a circumferential direction and an inner circumferential surface (12C) that serves as an inner circumferential surface extending along the circumferential direction and also extending along an axis direction. The amount of retained austenite in the inner ring raceway surface (12A) is larger than that in the inner circumferential surface (12C). The difference between the amount of retained austenite in the inner ring raceway surface (12A) and that in the inner circumferential surface (12C) is 3% by volume or more.
Inventors:
YAMADA MASAHIRO (JP)
FUJIMURA NAOKI (JP)
OHKI CHIKARA (JP)
FUJIMURA NAOKI (JP)
OHKI CHIKARA (JP)
Application Number:
PCT/JP2020/042944
Publication Date:
May 27, 2021
Filing Date:
November 18, 2020
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
C21D9/40; C21D1/06; C21D1/18; C21D1/42; F16C19/06; F16C19/36; F16C33/62; F16C33/64
Foreign References:
| JP2013160314A | 2013-08-19 | |||
| JPH1193956A | 1999-04-06 | |||
| JP2018009226A | 2018-01-18 | |||
| JP2004232858A | 2004-08-19 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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