Patent ID: 6770381
Filing Date: 2004-08-03
Classification: C22C,C23C,F16C,Y10T

Abstract:
A sliding bearing for supporting an opposing shaft movable in a sliding direction against said sliding bearing, said sliding bearing comprising:a backing metal, and a copper alloy consisting essentially of copper, from 0.1 to 2% by weight of Ag, and from 1 to 10% by weight of Sn, said alloy bonded to said backing metal, and having on its side opposite to the backing metal a roughened surface of approximately 0.5 to approximately 10 &mgr;m of roughness (Rz); said alloy having a first layer parallel to and adjacent to said backing metal, and a second layer adjacent to said first layer; wherein said roughened surface is coated with a coating layer comprising at least one thermo-setting resin, which is selected from the group consisting of polyimide resin, polyamide-imide resin, epoxy resin and phenol resin, and which contains from 55 to 95% by weight of MoS2, and wherein said roughened surface is formed of grooves extending in the sliding direction; wherein Ag and Sn are solid solution in the copper alloy without forming a secondary phase of Ag and Sn in at least the area of said second layer directly adjacent said roughened surface; and, wherein said second layer contains a second-layer component consisting of one of: solid solution of Ag and Sn, a hexagonal compound of solid solution of Ag and Sn, a hexagonal compound of Cu and solid solution of Ag and Sn, a eutectic of solid solution of Ag and Sn, or a eutectic of Cu and solid solution of Ag and Sn; in higher concentration of Ag and Sn than that of said first layer.