| 发明名称 |
BEARING PART AND ROLLING BEARING |
| 摘要 |
Each of an outer race, an inner race and a ball as a bearing part is a bearing part made of JIS standard SUJ2 and having a carbonitrided layer formed in a surface thereof, wherein, after heat treatment at a heating temperature of 500° C. for a retention time of one hour is performed, a Vickers hardness at a position with a depth of 0.02×T+0.175 (mm) from the surface is higher than a Vickers hardness at a core portion, which is a region where the carbonitrided layer is not formed in a thickness direction of the bearing part, by not less than 80 HV, where T represents the time of carbonitriding treatment for forming the carbonitrided layer. |
| 申请公布号 |
US2016003300(A1) |
申请公布日期 |
2016.01.07 |
| 申请号 |
US201414767250 |
申请日期 |
2014.02.03 |
| 申请人 |
OHKI Chikara |
发明人 |
OHKI Chikara |
| 分类号 |
F16C33/64;C21D9/40;C21D1/06;C22C38/00;C22C38/44;C22C38/42;C22C38/04;C22C38/02;F16C33/62;C23C8/32 |
主分类号 |
F16C33/64 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A bearing part made of JIS standard SUJ2 and having a carbonitrided layer formed in a surface thereof,
wherein, after heat treatment at a heating temperature of 500° C. for a retention time of one hour is performed, a Vickers hardness at a position with a depth of 0.02×T+0.175 (mm) from said surface is higher than a Vickers hardness at a core portion, which is a region where said carbonitrided layer is not formed in a thickness direction of said bearing part, by not less than 80 HV, where T represents the time of carbonitriding treatment for forming said carbonitrided layer. |
| 地址 |
Kuwana-shi, Mie JP |
