| 发明名称 |
BEARING COMPONENT AND ROLLING BEARING |
| 摘要 |
A bearing component composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion is provided. An average concentration of nitrogen in the surface portion is not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration is not higher than 0.1 mass %. An amount of retained austenite is not greater than 8 volume %. An area ratio of a precipitate in the inside where no carbonitrided layer is formed is not lower than 11%. |
| 申请公布号 |
US2016123396(A1) |
申请公布日期 |
2016.05.05 |
| 申请号 |
US201414895901 |
申请日期 |
2014.05.28 |
| 申请人 |
NTN CORPORATION |
发明人 |
OHKI Chikara;MATSUBARA Yukio;SATO Daisuke |
| 分类号 |
F16C33/62;C22C38/42;C23C8/32;C22C38/02;C22C38/00;C21D9/40;C22C38/44;C22C38/04 |
主分类号 |
F16C33/62 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A bearing component, composed of steel which contains carbon not less than 0.95 mass % and not more than 1.1 mass %, silicon less than 0.3 mass %, manganese less than 0.5 mass %, sulfur less than 0.008 mass %, and chromium not less than 1.4 mass % and less than 1.6 mass % and is composed of remainder iron and an impurity and having a carbonitrided layer formed at a surface portion including a contact surface which is a surface in contact with other components,
an average concentration of nitrogen in said surface portion being not lower than 0.3 mass % and not higher than 0.6 mass % and variation in nitrogen concentration in said surface portion being not higher than 0.1 mass %, an amount of retained austenite in said surface portion being not greater than 8 volume %, and an area ratio of a precipitate in inside where no said carbonitrided layer is formed being not lower than 11%. |
| 地址 |
Osaka JP |
