Title:
SINTERED OIL-CONTAINING BEARING
Document Type and Number:
WIPO Patent Application WO/2021/070712
Kind Code:
A1
Abstract:
A sintered bearing 1 comprises a sintered body, and a lubricating oil with which the sintered body is impregnated, and further has a bearing surface 1a. The sintered body contains, as main components, Fe, Cu, an element having a melting point lower than that of Cu, and a solid lubricant component. The contained amount of Cu is 10 mass% or more. In addition, the sintered body has an iron structure and a copper structure that are formed by sintering of a partially diffused alloy powder in which copper powder is partially diffused in iron powder, wherein the element having a melting point lower than that of Cu is diffused at least in the copper structure. The lubricating oil contains an ester oil as a base oil, and, as an additive, an extreme pressure additive that reacts with the iron structure to form an inorganic coating.
Inventors:
ITO YOSHINORI (JP)
YAMASHITA TOMONORI (JP)
HARADA KAZUYOSHI (JP)
YAMASHITA TOMONORI (JP)
HARADA KAZUYOSHI (JP)
Application Number:
PCT/JP2020/037234
Publication Date:
April 15, 2021
Filing Date:
September 30, 2020
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
B22F7/00; C10M105/32; C22C33/02; C22C38/00; F16C17/02; F16C33/10; F16C33/12; C10N30/06; C10N40/02
Foreign References:
| JP2019031738A | 2019-02-28 | |||
| JPH10184688A | 1998-07-14 | |||
| JP2003120674A | 2003-04-23 | |||
| JP2012506494A | 2012-03-15 | |||
| JP2017101808A | 2017-06-08 | |||
| JP2000336384A | 2000-12-05 | |||
| JPH01255631A | 1989-10-12 | |||
| JP2005082867A | 2005-03-31 | |||
| JPH0552221A | 1993-03-02 |
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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