Journal bearing material and method for manufacturing the same

摘要

A method for the preparation of a self-lubricating, multilayer slide bearing material which does not require maintenance and comprises a metallic support with a porous bronze layer sintered onto it and whose pores are filled by vacuum infiltrated with polytetrafluoroethylene (PTFE), comprises the following steps: (a) bronze powder with a mean particle size of ca. 40 mu m and comprising dendritic shaped particles of various sizes is applied onto a support (1) ; (b) the support is sintered in an oven at ca. 800 degrees C in a protective gas atmosphere and during sintering it is hot-rolled to produce a porosity of 40-70 % throughout the thickness of the bronze layer (2); (c) up to 20 wt.% of the pores are vacuum infiltrated with PTFE (3); and (d) the bronze layer is compacted. A slide bearing material is also claimed, comprising a porous sintered bronze layer applied onto a metallic support and having its pores filled with PTFE evenly distributed in the bronze layer thickness direction to form a slide surface without sticking out beyond the surface of the bronze layer.