| 摘要 |
<p>A bearing for use in combination with an aluminium alloy housing has a high coefficient of thermal expansion so that it can satisfactorily follow deformation of the housing, and high heat radiation properties. The bearing has a bearing alloy layer having a thickness of 3 to 50 mu m provided on a copper alloy layer having a coefficient of thermal expansion of 15 x 10<-6>/ DEG C or more, a coefficient of thermal conductivity of 0.40 cal/cm sec. DEG C or more and 0.2% proof stress of 295 N/mm<2> or more. The bearing may be provided with: (a) an intermediate layer between the copper alloy layer and the overlay bearing; or (b) a flash-plated layer on a surface of the bearing. The bearing alloy may be (a) an aluminium alloy containing 2 - 60% of Sn, Pb and/or Sb, or (b) a lead alloy containing 2 - 30% of Sn, In, Sb and/or Cu. The copper alloy may be a Cu - Cr or a Cu - Fe - P - Zn alloy.</p> |
