| 摘要 |
The purpose of the present invention is to provide: a copper alloy for sliding bearings, whereby it becomes possible to prevent a primary Mn-Si crystal from causing seizure; and a sliding bearing. The copper alloy for sliding bearings and the sliding bearing according to the present invention are characterized in that the copper alloy for sliding bearing contains 25 to 48 wt% inclusive of Zn, 1 to 7 wt% inclusive of Mn, 0.5 to 3 wt% inclusive of Si, 1 to 10 wt% inclusive of Bi, and a remainder made up by unavoidable impurities and Cu, wherein the copper alloy contains, on a sliding surface thereof against a counter material, both Bi particles each having an equivalent circle diameter that is larger than an average equivalent circle diameter of primary Mn-Si crystals and Bi particles each having an equivalent circle diameter that is smaller than the average equivalent circle diameter of the primary Mn-Si crystals. |
