Patent ID: 8186061
Filing Date: 2012-05-29
Classification: F16C,Y10T

Abstract:
1. A manufacturing method, comprising: pressing a bearing surface of a bearing member to decrease a surface roughness thereof by plastically deforming projecting portions formed on the bearing surface, the bearing member made of AlSi alloy containing 5 weight % to 40 weight % of Si; and after said pressing, anodizing the bearing surface of the bearing member to form an aluminum oxide film on the bearing surface; wherein said AlSi alloy is manufactured by using an AlSi alloy fine powder by an atomizing method and has a microstructure where a Si phase is distributed in an Al phase and in an island pattern, wherein portions of the bearing surface, where the Al phase is exposed, are formed in a raised state due to the formation of the aluminum oxide film, and wherein portions of the bearing surface, where the Si phase is exposed and the aluminum oxide film is not formed, are formed in a dimple state by said anodizing.