| 发明名称 |
BEARING COMPONENT AND ROLLING BEARING |
| 摘要 |
A bearing component (an outer ring, an inner ring, and a ball) is made of bearing steel, and has a surface layer portion that is nitrided and includes an outer ring raceway surface and an inner ring raceway surface or a rolling surface. A nitrogen concentration in the surface layer portion is 0.4 mass % or higher. An area ratio of a precipitate in an inner portion that is not nitrided is 11% or higher. |
| 申请公布号 |
US2015377293(A1) |
申请公布日期 |
2015.12.31 |
| 申请号 |
US201414766419 |
申请日期 |
2014.01.20 |
| 申请人 |
NTN CORPORATION |
发明人 |
SAKANAKA Noriaki;MATSUBARA Yukio;OHKI Chikara;SATO Daisuke |
| 分类号 |
F16C33/62;F16C33/64;F16C19/06 |
主分类号 |
F16C33/62 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A bearing component made of bearing steel and having a surface layer portion, said surface layer portion being nitrided and including a raceway surface or a rolling surface,
a nitrogen concentration in said surface layer portion being 0.4 mass % or higher, and an area ratio of a precipitate in an inner portion that is not nitrided being 11% or higher. |
| 地址 |
Osaka-shi, Osaka JP |
