| 摘要 |
PURPOSE:To provide superior seizure resistance and good machinability required as bearing material, by specifying quantity ratios of Cu, Mn, Al, Ni, Si, Pb, Bi, Te, Zn, etc., and controlling metallographical structure. CONSTITUTION:Bearing Cu alloy is composed of 50-75wt% Cu, 1.5-4.0% Mn, 1.0-2.5% Al, 0.3-1.5% Ni, 0.5-2.0% Si and >=one kind among 0.1-1.5% Pb, 0.1-1.5 Bi, 0.05-0.5% Te and the balance Zn with inevitable impurities. If necessary, further 0.1-1.0% Ti and Zr are added to the alloy. In the structure of the alloy, it is controlled to <=80mum average grain size, <=10mum average size of the second phase particle composed of crystallized or pptd. intermetallic compd., <17% area ratio thereof an arbitrary section. The alloy has superior workability and seizure resistance, and excellent property especially in wear resistance and accustoming property.
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