Patent ID: 8157934

Claim:
A wear-resistant aluminum alloy material comprising: an alloy having a composition comprising 13 to 15 mass % of silicon, 5.5 to 9 mass % of copper, 0.2 to 1 mass % of magnesium, 0.5 to 1 mass % of nickel, and 0.003 to 0.03 mass % of phosphorous, the alloy comprising aluminum and inevitable impurities constituting balance of the composition, wherein the alloy comprises primary silicon particles and intermetallic compounds, the primary silicon particles have an average particle diameter of 10 to 30 μm and an area occupancy rate in cross-section of 3 to 12%, and the intermetallic compounds have an average particle diameter of 1.5 to 8 μm and an area occupancy rate in cross-section of 4 to 12%.