| 摘要 |
A multi-layer sliding material comprising a bearing alloy layer (2) and a tin base overlayer (6) of tin-copper series provided thereon through an intermediate layer (3), the tin base overlayer comprising a plurality of layers (4, 5) having different copper content, among which the lowest layer (4) in contact with the intermediate layer (3) contains 5 to 20% by per cent of copper and has a thickness of 1 to 3 žm. This prevents reduction in the copper content in the surface layer of the overlayer due to diffusion of copper for a long time and can maintain a good anti-seizure property without losing the conformability. The intermediate layer can be of Nickel, Iron or Cobolt and of 0.5-3 žm thickness. The upper layer (5) can have 0.5 to 10% of copper. The alloy layer (2) can be a Copper or Aluminium base alloy. The upper layer (5) can have up to 5% of Zinc, Indium, Antimony or Silver. |
