Sliding bearing used in turbocharger of internal combustion engine
AssigneeDaido Metal Company Ltd.
InventorsKazuaki TODA, Shinji OCHI
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Abstract
Disclosed is a sliding bearing used in turbochargers of internal combustion engines. It is formed with a copper alloy containing, by mass %, 25 to 45% Zn, 0.3 to 2.0% Si, 1.5 to 6.0% Mn, and the balance being Cu and unavoidable impurities. The sliding bearing has a cylindrical shape for supporting a rotating shaft. Crystallized Mn—Si compounds are dispersed in a matrix of the copper alloy, the compounds extending in an axial direction of the rotating shaft on a sliding surface of the sliding bearing. The crystallized Mn—Si compounds have an average inter-grain distance of 20 to 80 μm. The matrix may contain precipitated Mn—Si compounds as well as the crystallized Mn—Si compounds.
Claims8
A sliding bearing used in turbochargers of internal combustion engines, which is formed with a copper alloy comprising, by mass %, 25 to 45% Zn, 0.3 to 2.0% Si, 1.5 to 6.0% Mn, and the balance being Cu and unavoidable impurities, and which has a cylindrical shape for supporting a rotating shaft, wherein crystallized Mn—Si compounds, which extend in an axial direction of the rotating shaft on a sliding surface of the sliding bearing, are dispersed in a matrix of the copper alloy, and wherein the crystallized Mn—Si compounds have an average inter-grain distance of 20 to 80 μm.
Dependencies are inferred from the claim text.