Thrust bearing for turbocharger of internal-combustion engine
AssigneeDaido Metal Company Ltd.
InventorsKazuaki Toda, Satoru Kurimoto, Ryo Sato
Life of this patent
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Abstract
A thrust bearing for a turbocharger of an internal-combustion engine is made of a copper alloy including a brass matrix and a needle-like Mn—Si-based compound dispersed in the brass matrix. Not less than 50% of the needle-like Mn—Si-based compound dispersed in a region from a surface of a sliding portion of the thrust bearing to a depth of 50 μm have a major axis extending from the inside of the sliding portion to the surface. The major axis makes an angle of 30° to 150° with the surface of the sliding portion when observed in a sectional view perpendicular to the surface of the sliding portion.
Claims3
A thrust bearing for a turbocharger of an internal-combustion engine, made of a copper alloy comprising
- a brass matrix and elongated Mn—Si-based compound parts dispersed in the brass matrix,
- wherein not less than 50% of the elongated Mn—Si-based compound parts are dispersed in a region from a surface of a sliding portion of the thrust bearing to a depth of 50 μm, and
- have a major axis extending from an inside of the sliding portion to the surface of the sliding portion,
- the major axis making an angle of 30° to 150° with the surface of the sliding portion when observed in a sectional view perpendicular to the surface of the sliding portion.
Dependencies are inferred from the claim text.