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Title:
RACE MEMBER AND ROLLING BEARING
Document Type and Number:
WIPO Patent Application WO/2020/153243
Kind Code:
A1
Abstract:
An inner ring (12) is made of high-carbon steel and has an inner ring raceway surface (12A) extending along the circumferential direction and an inner peripheral surface (12C) as a circumferential surface extending along the circumferential direction and also extending along the axial direction. A retained austenite amount on the inner ring raceway surface (12A) is larger than the retained austenite amount on the inner peripheral surface (12C). The difference between the retained austenite amount on the inner ring raceway surface (12A) and the retained austenite amount on the inner peripheral surface (12C) is 5% by volume or more.

Inventors:
YAMADA MASAHIRO (JP)
YUKI HIROSHI (JP)
OHKI CHIKARA (JP)
Application Number:
PCT/JP2020/001440
Publication Date:
July 30, 2020
Filing Date:
January 17, 2020
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
C21D9/40; C21D1/06; F16C19/06; F16C19/36; F16C33/62; F16C33/64
Foreign References:
JP2009221493A2009-10-01
JP2014238118A2014-12-18
JP2006291248A2006-10-26
JP2014020538A2014-02-03
JPH0727139A1995-01-27
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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