Title:
転がり軸受の軌道輪
Document Type and Number:
Japanese Patent JP7328032
Kind Code:
B2
Abstract:
This raceway ring (10) for a rolling bearing is composed of steel and is provided with an outer circumferential surface (10d) and an inner circumferential surface (10c). One of the outer circumferential surface (10d) and the inner circumferential surface (10c) has a raceway surface (10e). The other of the outer circumferential surface (10d) and the inner circumferential surface (10c) serves as an anti-raceway surface. The volumetric fraction of residual austenite in the anti-raceway surface is smaller than the volumetric fraction of residual austenite in the raceway surface (10e). The difference between the volumetric fraction of residual austenite in the raceway surface (10e) and the volumetric fraction of residual austenite in the anti-raceway surface is at least 5 volume percent. The average particle diameter of prior austenite grains in the raceway surface (10e) is at most 8 μm.
Inventors:
Masahiro Yamada
Power of Oki
Power of Oki
Application Number:
JP2019125239A
Publication Date:
August 16, 2023
Filing Date:
July 04, 2019
Export Citation:
Assignee:
ntn corporation
International Classes:
F16C33/62; C21D9/40; F16C19/06; F16C33/64
Domestic Patent References:
| JP2009221493A | ||||
| JP2008106877A | ||||
| JP2006071022A |
Foreign References:
| WO2018159840A1 |
Attorney, Agent or Firm:
Patent Attorney Fukami Patent Office
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