| 发明名称 |
BEARING PART, ROLLING BEARING, AND METHODS OF MANUFACTURING THEM |
| 摘要 |
An outer ring, an inner ring, and a ball, each of which is a bearing part, are made of a quench-hardened steel containing not less than 0.90 mass % and not more than 1.05 mass % of carbon, not less than 0.15 mass % and not more than 0.35 mass % of silicon, not less than 0.01 mass % and not more than 0.50 mass % of manganese, and not less than 1.30 mass % and not more than 1.65 mass % of chromium with the rest consisting of an impurity. A contact surface thereof with another part has a nitrogen concentration of not less than 0.25 mass %. A remaining austenite amount in the contact surface is not less than 6 volume % and not more than 12 volume %. |
| 申请公布号 |
US2014348454(A1) |
申请公布日期 |
2014.11.27 |
| 申请号 |
US201214363750 |
申请日期 |
2012.12.07 |
| 申请人 |
NTN Corporation |
发明人 |
Ueno Takashi;Ohki Chikara;Sato Daisuke;Kageyama Kyouhei;Shimizu Shougo |
| 分类号 |
C21D9/36;C22C38/02;C22C38/04;F16C33/32;F16C43/04;F16C19/06;F16C33/38;F16C33/80;C21D9/40;C22C38/18;F16C33/62 |
主分类号 |
C21D9/36 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A bearing part, wherein
the bearing part is made of a quench-hardened steel containing not less than 0.90 mass % and not more than 1.05 mass % of carbon, not less than 0.15 mass % and not more than 0.35 mass % of silicon, not less than 0.01 mass % and not more than 0.50 mass % of manganese, and not less than 1.30 mass % and not more than 1.65 mass % of chromium with the rest consisting of an impurity, the bearing part has a contact surface, which is a surface that makes contact with another part and has a nitrogen concentration of not less than 0.25 mass %, and a remaining austenite amount in said contact surface is not less than 6 volume % and not more than 12 volume %. |
| 地址 |
Osaka-shi, Osaka JP |
