Taiho Kogyo Co., Ltd.

Kao Mouri

Hiromi Yokota

Ryo Mukai

Atsushi Koyama

Nahomi Hamaguchi

Sliding parts are made of Pb-free Cu&#x2014;Bi based sintered material. The side in contact with a shaft is machined to a predetermined roughness. A number of Bi phases are present on the finished surface. Stable performance of Bi is to be exhibited. Machined sintered material covers a portion of the Bi phases. The ratio of the exposed surface area of the Bi phases is 0.5% or more relative to the area of the finished surface.

Sliding part made of Pb-free Cu-Bi based sintered alloy

The present invention relates to sliding material provided by sintering a lead-free copper or copper alloy and contains at least one mineral selected from the group consisting of talc, mica, kaolinite mineral and montmorillonite mineral. Pb has conventionally been included in sliding materials for the purpose of obtaining conformability and seizure resistance. Despite the absence of Pb, the Pb-free copper-based sliding material and sliding parts according to the present invention have improved sliding properties.

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Toyota, Japan

Kao Mouri