Invention Grant
- Patent Title: Sintered bearing and method for manufacturing same
-
Application No.: US16106528Application Date: 2018-08-21
-
Publication No.: US11433455B2Publication Date: 2022-09-06
- Inventor: Yoshinori Ito , Sunao Shimizu , Eiichirou Shimazu , Takahiro Okuno
- Applicant: NTN CORPORATION
- Applicant Address: JP Osaka
- Assignee: NTN CORPORATION
- Current Assignee: NTN CORPORATION
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2011-207802 20110922,JP2012-018713 20120131,JP2012-020855 20120202,JP2012-020858 20120202
- Main IPC: B22F1/00
- IPC: B22F1/00 ; B32B15/01 ; F16C33/12 ; B22F7/06 ; B22F3/02 ; B22F3/10 ; F16C33/10 ; B22F1/068

Abstract:
Provided is a sintered bearing that is capable of reducing cost through reduction in usage amount of copper, excellent in initial running-in characteristics and quietness, and is high in durability. Raw material powders including iron powder, flat copper powder, low-melting point metal powder, and graphite are loaded into a mold, and a green compact is formed under a state in which the flat copper powder is caused to adhere onto a molding surface. Subsequently, sintering is carried out without causing iron in the green compact to react with carbon so that an iron structure is formed of a ferrite phase. In this manner, a sintered bearing (1) including a base part (S2) including copper at a uniform content, and a surface layer (S1) covering a surface of the base part (S2) and including copper at a larger content than the base part (S2) can be obtained.
Public/Granted literature
- US20180354029A1 SINTERED BEARING AND METHOD FOR MANUFACTURING SAME Public/Granted day:2018-12-13
Information query