
基本信息:
- 专利标题: BEARING ELEMENT, ROLLING BEARING AND PROCESS FOR PRODUCING BEARING ELEMENT
- 专利标题(中):LAGERELEMENT,WÄLZLAGERUND VERFAHREN ZUR HERSTELLUNG EINES LAGERELEMENTS
- 申请号:EP13846585.1 申请日:2013-10-16
- 公开(公告)号:EP2910657A1 公开(公告)日:2015-08-26
- 发明人: SATO, Daisuke , OHKI, Chikara
- 申请人: NTN Corporation
- 申请人地址: 3-17, Kyomachibori 1-chome Nishi-ku Osaka-shi, Osaka 550-0003 JP
- 专利权人: NTN Corporation
- 当前专利权人: NTN Corporation
- 当前专利权人地址: 3-17, Kyomachibori 1-chome Nishi-ku Osaka-shi, Osaka 550-0003 JP
- 代理机构: Bockhorni & Kollegen
- 优先权: JP2012229988 20121017; JP2013025463 20130213
- 国际公布: WO2014061699 20140424
- 主分类号: C22C38/00
- IPC分类号: C22C38/00 ; C21D1/06 ; C21D1/76 ; C21D9/40 ; C22C38/18 ; C23C8/32 ; C23C8/80 ; F16C19/02 ; F16C19/22 ; F16C33/56 ; F16C33/62 ; F16C33/64
摘要:
An outer ring (11), an inner ring (12), and a ball (3) each serving as a bearing part is made of a steel containing 0.95 mass% or more and 1.10 mass% or less of carbon, 0.05 mass% or more and less than 0.3 mass% of silicon, 0.10 mass% or more and 0.50 mass% or less of manganese, and 1.30 mass% or more and 2.00 mass% or less of chromium, with the rest made up of iron and an impurity. A surface layer region (11B, 12B, 13B) defined as a region extending to a depth of not more than 20 µm from an outer ring raceway surface (11A), an inner ring raceway surface (12A), and a ball rolling surface (13A), which are each a surface where the bearing part is in rolling contact with another part, has an average nitrogen concentration of 0.2 mass% or more and 0.7 mass% or less. Five or more carbides with a diameter of 0.5 µm or less are present per 100 µm 2 in the surface layer region (11B, 12B, 13B).
摘要(中):
每个用作轴承部分的外圈(11),内圈(12)和球(3)由含有0.95质量%以上且1.10质量%以下的碳,0.05质量%的钢或 大于等于0.3质量%的硅,0.10质量%以上且0.50质量%以下的锰,以及1.30质量%以上且2.00质量%以下的铬,其余由铁和杂质构成。 被定义为从外圈滚道表面(11A)延伸到不大于20μm深度的区域,内圈滚道表面(12A)和滚珠滚动表面(11A)的表面层区域(11B,12B,13B) 13A),它们各自是轴承部分与另一部分滚动接触的表面,其平均氮浓度为0.2质量%以上且0.7质量%以下。 在表面层区域(11B,12B,13B)中每100μm2存在5个以上的直径为0.5μm以下的碳化物。
公开/授权文献:
IPC结构图谱:
C | 化学;冶金 |
--C22 | 冶金(铁的冶金入C21);黑色或有色金属合金;合金或有色金属的处理 |
----C22C | 合金 |
------C22C38/00 | 铁基合金,例如合金钢 |