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US 2016/0108961 A1Published application
Bearing ring and rolling bearing
AssigneeJtekt Corporation
InventorsWataru YOSHIDA, Towako MATSUI, Katsuhiko KIZAWA, Takashi SADA
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Abstract
A bearing ring formed of quenched and tempered high carbon chromium bearing steel, including an inner layer portion formed of tempered martensite or sorbite and having a Vickers hardness of more than 490 HV and 710 HV or less, and a surface layer portion formed to enclose an entire periphery of the inner layer portion, formed of tempered martensite, and having a higher hardness than the inner layer portion.
Claims8
A bearing ring formed of quenched and tempered high carbon chromium bearing steel, comprising:
- an inner layer portion formed of tempered martensite or sorbite and having a Vickers hardness of more than 490 HV and 710 HV or less;
- and
- a surface layer portion formed to enclose an entire periphery of the inner layer portion, formed of tempered martensite, and having a higher hardness than the inner layer portion.
Dependencies are inferred from the claim text.