| 摘要 |
[PROBLEMS] To provide an aluminum alloy being excellent in wear resistance and capable of reducing the wear of a mating material. [MEANS FOR SOLVING PROBLEMS] An aluminum alloy being excellent in wear resistance, characterized in that it contains, in mass %, 12.0 to 14.0 % of Si, 2.0 to 5.0 % of Cu, 0.1 to 1.0 % of Mg, 0.8 to 1.3 % of Mn, 0.10 to 0.5 % of Cr, 0.05 to 0.20 % of Ti, 0.5 to 1.3 % of Fe, 0.003 to 0.02 % of P, and has a Ca content controlled to less than 0.005 mass %, the balance being Al and inevitable impurities; and an aluminum alloy sliding member excellent in wear resistance, which has the above composition, the balance being Al and inevitable impurities, and contains primary crystals of Si having a grain diameter of 20 mum or more in an amount of 20 pieces/mm2 or less. Said alloy may contain one or two of 0.0001 to 0.01 mass % of B, and 0.3 to 3.0 mass % of Ni.
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