Ntn Corporation

Toshihiko Mouri

Yousuke Sugai

Fuminori Satoji

Hiroharu Nagata

Noriyoshi Yoshizuka

Yoshinori Ito

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

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.

A sliding member () is formed of a sintered compact. The sintered compact includes: a base layer (), which mainly contains an Fe-based structure and further contains 1.0 wt % to 5.0 wt % of Cu, a metal having a melting point lower than a melting point of Cu, and C; and a sliding layer (), which is sintered together with the base layer () in a state of being held in contact with the base layer () and has a sliding surface (A). The sliding layer () mainly contains an Fe-based structure containing at least one kind of alloy element selected from Ni, Mo, Mn, and Cr and further contains Cu and C, and the content of Cu in the sliding layer () is larger than the content of Cu in the base layer.

Slide member and method for manufacturing same

Provided is a sintered bearing () including an inner layer () and an outer layer () formed by integral molding, the sintered bearing () having a bearing surface (A) formed on an inner peripheral surface () of an inner layer (). The inner layer () is made of sintered metal containing Fe and a hardness increasing element (such as Ni or Mo). The outer layer () is made of sintered metal containing Fe and no hardness increasing element. A concentration gradient of the hardness increasing element is present at an interface between the inner layer () and the outer layer ().

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Aichi, Japan

Toshihiko Mouri