SINTERED BEARING AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2013/042664

A1

The purpose of the present invention is to provide a sintered bearing capable of reducing the amount of copper required and lowering production costs, while exhibiting excellent initial running-in characteristics and quietness as well as high durability. A mold is filled with a starting material powder including iron powder, a flat copper powder, a low-melting-point metallic powder, and graphite; and a green compact is formed in a state where the flat copper powder has been deposited on the die molding face. Iron inside the green compact is subsequently sintered without reacting with the carbon, whereby an iron structure is formed in a ferrite phase, and a sintered bearing is obtained. The sintered bearing (1) has a base part (S2) in which the copper content is uniform, and a surface layer (S1) covering the surface of the base part (S2) and having a higher copper content than the base part (S2).

JP4230025	Clad mold for hot press and its manufacturing method
JPH11279718	PISTON RING WEAR RESISTANT RING MADE OF FREE GRAPHITE-PRECIPITATED IRON SERIES SINTERING MATERIAL EXCELLENT IN HIGH TEMPERATURE WEAR RESISTANCE

ITO YOSHINORI (JP)
SHIMIZU SUNAO (JP)
SHIMAZU EIICHIROU (JP)
OKUNO TAKAHIRO (JP)

PCT/JP2012/073848

March 28, 2013

September 18, 2012

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NTN TOYO BEARING CO LTD (JP)

B22F5/00; B22F7/00; C22C38/00; F16C17/02; F16C33/10; F16C33/12; F16C33/14

JP2010077474A	2010-04-08
JP2011094167A	2011-05-12

SHIROMURA Kunihiko et al. (JP)
Kunihiko Shiromura (JP)

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