Ntn Corporation

Hiroharu Nagata

Toshihiko Mouri

Yoshinori Ito

Takahiro Gotou

Tomoyuki Seto

Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900° C., to bond iron structures to each other with copper and tin.

Machine component made of ferrous sintered metal

Provided is a sintered bearing for an EGR valve, including raw material powder including 9% by weight to 12% by weight of aluminum, 0.1% by weight to 0.6% by weight of phosphorus, 3% by weight to 10% by weight of graphite, and the balance including copper as a main component, and inevitable impurities. The sintered bearing has a structure of a sintered aluminum-copper alloy. The sintered bearing further includes free graphite distributed in pores formed so as to be dispersed.

Sintered bearing for an EGR valve and manufacturing method thereof

Raw material powder containing iron powder, copper powder, and tin powder is compressed to form a green compact. The green compact is sintered in a temperature range of from 750 to 900&#xb0; C., to bond iron structures to each other with copper and tin.

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Aichi, Japan

Hiroharu Nagata