Patent ID: 6575635
Filing Date: 2003-06-10
Classification: F16C,Y10S

Abstract:
A multi-layers sliding bearing comprisinga back metal layer, a bearing alloy layer selected from the group consisting of a Cu alloy and an Al alloy, an intermediate plating layer selected from the group consisting of Ni, Ag and an alloy containing Cu as the main constituent, and a Sn-based overlay layer containing substantially no Pb, said Sn-based overlay layer containing a reinforcing metal and/ inorganic particles, wherein said reinforcing metal is present in an amount not more than 30 mass % and/or said inorganic particles are present in an amount not more than 25 vol %, a content of said reinforcing metal and/or inorganic particles being varied step-wise or successively in a direction of a thickness of said overlay layer so that said content in a thickness-wise central portion of said overlay layer is relatively high and so that said content in a surface portion of said overlay layer and a boundary portion thereof adjacent said intermediate plating layer is zero or smaller than said content in said central portion of said overlay layer.