| 摘要 |
<p>A composite copper alloy bearing comprises a backing metal layer, an intermediate layer of Cu-Pb alloy, and a surface layer of A* litres *-Sn alloy. The thickness of the surface layer is not less than either larger value selected between 0.06 mm and a value 0.2 times the sum of thicknesses of the intermediate layer and the surface layer, but not more than a value 0.5 times the sum of the thicknesses of the intermediate layer and the surface layer. The surface layer exhibits excellent sliding properties while the intermediate layer maintains high conformability. The layers may be joined by pressure bonding, with or without a Ni or Al dam layer therebetween. The intermediate layer may comprise 9 - 32% Pb, 0 - 12% Sn, 0 -5% P, and the balance Cu. The surface layer may comprise 3 - 40% Sn, 0.5 - 15% Pb, 0.1 - 3% Si, 0.2 - 5% Cu, 0 - 3% in total selected from Ni, Mn, V, Mg and Sb, and the balance Al.</p> |
