Title:
SINTERED BEARING FOR MOTOR-TYPE FUEL PUMP WITH OUTSTANDING CORROSION RESISTANCE, WEAR RESISTANCE, AND CONFORMABILITY
Document Type and Number:
WIPO Patent Application WO/2013/172326
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a bearing for a motor-type fuel pump that has corrosion resistance against poor-quality gasoline that includes sulfur or organic acids, that, because of resistance to wear and outstanding conformability with a coupled shaft, can be used favorably even in compact fuel pumps, and that is made of a novel Zn-P-Ni-Sn-C-Cu-based sintered alloy. The bearing is characterized by having a structure in which contained are, by weight, 3-13% Zn, 0.1-0.9% P, 10-21% Ni, 3-12% Sn, and 1-8% C, with the remainder consisting of Cu and unavoidable impurities, in which an Sn alloy phase that comprises at least 15% Sn by weight is formed on grain boundaries of a base comprising a solid solution phase of a Zn-Ni-Sn-Cu alloy, and in which the porosity is 8-18%, and free graphite is distributed in the pores.
Inventors:
TAKEZOE SHINICHI (JP)
ISHII YOSHINARI (JP)
ISHII YOSHINARI (JP)
Application Number:
PCT/JP2013/063375
Publication Date:
November 21, 2013
Filing Date:
May 14, 2013
Export Citation:
Assignee:
DIAMET CORP (JP)
International Classes:
C22C9/06; B22F5/00; C22C1/08; C22C9/04; C22C13/00; F16C33/12; F16C33/16; C22C1/04
Foreign References:
| JP2005314807A | 2005-11-10 | |||
| JP2006199977A | 2006-08-03 | |||
| JP2002180162A | 2002-06-26 | |||
| JP2001192754A | 2001-07-17 | |||
| JP2001192754A | 2001-07-17 | |||
| JP2002180162A | 2002-06-26 | |||
| JP2006199977A | 2006-08-03 |
Other References:
See also references of EP 2851444A4
Attorney, Agent or Firm:
USHIKI, Mamoru (JP)
牛木 護 (JP)
牛木 護 (JP)
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