Daido Metal Company Ltd.

Shigeya Haneda

Hiroyuki Asakura

Mikihito Yasui

Satoshi Takayanagi

Hideo Tsuji

Yukihiko Kagohara

Tatsuo Yamada

There is provided a sliding member formed by combining a resin overlay and a soft metal overlay. The sliding member has a soft layer comprising a metallic material with a hardness of less than 40 HV provided under a resin overlay layer comprising a solid lubricant and resin. In the event of contamination by a foreign matter, the soft layer under the resin overlay layer is capable of plastic deformation and the resin overlay layer is capable of partial deformation accompanying the plastic deformation due to the hardness (T) (&#x3bc;m) of the soft layer and the hardness (T) (&#x3bc;m) of the resin overlay layer being such that 0.2&#x2264;T/T&#x2264;7.0 and 3.0&#x2264;T&#x2264;20.0. Consequently, a foreign matter is desirably embedded and resistance to a foreign matter can be improved. Low friction is maintained by the resin overlay layer even after contamination by a foreign matter.

Sliding member

A slide member is provided with a base material and an overlay provided over the base material. The overlay includes a plurality of regions in a thickness direction including a region located in sliding-surface side that slides with the counter element and a region located in a base-material side. A material forming the overlay includes a plurality of crystal planes. Orientation index of at least one of the crystal planes differs in the region located in the sliding-surface side and the region located in the base-material side of the overlay.

A slide member provided with an overlay composed of a Bi-based material. A slide member includes a substrate; and an overlay including Bi or a Bi alloy provided over the substrate. A surface portion (surface-most portion) of the overlay includes an oxide layer in which a bismuth oxide, is scattered. The content of the bismuth oxide in the oxide layer represented by oxygen content is equal to or greater than 0.5% mass % and equal to or less than 8.0 mass %. The orientation intensity ratio of the main orientation plane of Bi or Bi alloy crystals in the overlay is 50% or greater. The main orientation plane of the bismuth oxide crystals in the oxide layer is the (220) plane or the (201) plane.

Slide member and method of manufacturing slide member

In a slide member in which an overlay is provided on a slide receiving surface of a base member, the overlay is formed by attaching a mixed solid lubricant on the slide receiving surface of the base member. The mixed solid lubricant is made by mixing a large amount of hydrogen containing solid lubricant which contains a large amount of hydrogen, and a small amount of hydrogen containing solid lubricant which contains a smaller hydrogen amount than the large amount of hydrogen containing lubricant. Thereby, a lubricant absence region where the solid lubricant is absent in a thickness direction is formed on the slide receiving surface of the base member after sliding, and an oxidized portion where the base member is oxidized is formed in the lubricant absence region.

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Inuyama, Japan

Shigeya Haneda