Patent ID: 6042778
Filing Date: 2000-03-28
Classification: F16C

Abstract:
A method of making a multilayered sliding bearing material which is self-lubricating and maintenance-free, the method comprising the steps of:a. applying a layer of bronze powder onto a metallic supporting body, the bronze powder having different particle sizes, having a mean particle size of about 40 .mu.m, and having a particle shape which is dendritic;b. sintering the layer of bronze powder onto the metallic supporting body in a furnace at a temperature of about 800.degree. C. to provide a sintered layer of bronze having pores and to provide a sintered assembly;c. hot rolling the sintered assembly to provide the bronze layer with a porosity ranging from 40 to 70% throughout the entire thickness of the bronze layer;d. placing the sintered assembly in a container under a vacuum;e. supplying a suspension comprised of PTFE particles to the container for an infiltration period effective to secure infiltration of the PTFE particles into the pores of the sintered layer of bronze and provide a PTFE-impregnated bronze layer having a PTFE content of up to 20 weight %; andf. densifying the PTFE-impregnated bronze layer by means of rolling so that the PTFE-impregnated bronze layer has a sliding surface comprised of PTFE but no PTFE cover layer.