Title:
ROLLING BEARING AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2024/014007
Kind Code:
A1
Abstract:
Provided is a rolling bearing that can have an oxide film having excellent durability and that can minimize occurrence of brittle fracture due to hydrogen, thereby being able to improve durability of raceway surfaces and rolling elements. The rolling bearing is provided with a first bearing ring (11) having a first raceway surface (13), a second bearing ring (12) having a second raceway surface (14), and a plurality of rolling elements (15) held in a rollable manner between the first raceway surface (13) and the second raceway surface (14). At least either one of the first raceway surface (13) and the second raceway surface (14) or the rolling element (15) has, on the surface thereof, an oxide film (17) containing Fe3O4. The thickness of the oxide film is 0.6-2.0 μm, and the crystallite size of Fe3O4 calculated from a peak belonging to a plane (311) thereof is 2.5-3.2 nm.
Inventors:
OKAZAKI TSUYOSHI (JP)
TANAKA YUKI (JP)
TANAKA YUKI (JP)
Application Number:
PCT/JP2022/032467
Publication Date:
January 18, 2024
Filing Date:
August 29, 2022
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
F16C33/64; C23C8/10; F16C19/10; F16C33/58
Domestic Patent References:
| WO1990008264A1 | 1990-07-26 | |||
| WO2018101246A1 | 2018-06-07 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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