Abrasion-resistant aluminum alloy and method of preparing the same

A method of preparing an abrasion-resistant aluminum alloy by casting an aluminum alloy consisting of 13.0 to 16.0 percent by weight of Si, 4.0 to 5.0 percent by weight of Cu, at least 0.8 and less than 1.4 percent by weight of Mg, at least 0.2 and not more than 0.8 percent by weight of Fe, not more than 0.1 percent by weight of either P or at least one of Na, Sb and Sr, not more than 0.5 percent by weight of Mn or Ni and a remainder of Al and unavoidable impurities and carrying out hot plastic working on said aluminum alloy at a working rate of at least 30% for homogeneously dispersing coarse Si particles of 15 to 40 .mu.m mean particle diameter, fine Si particles of not more than 5 .mu.m mean particle diameter and other fine particles comprising a metallic compound comprising at least one of Al, Si, Cu, Mg, and Fe, throughout a microstructure of said alloy.

An abrasion-resistant aluminum alloy consisting of 13.0 to 16.0 percent by weight of Si, 4.0 to 5.0 percent by weight of Cu, at least 0.8 and less than 1.4 percent by weight of Mg, at least 0.2 and not more than 0.8 percent by weight of Fe, not more than 0.1 percent by weight of either P or at least one of Na, Sb and Sr, and a remainder of Al and unavoidable impurities, wherein said alloy has a microstructure containing coarse Si particles of 15 to 40 .mu.m mean particle diameter, fine Si particles of not more than 5 .mu.m mean particle diameter and other fine particles comprising a metallic compound comprising at least one of Al, Si, Cu, Mg and Fe, with a homogeneous dispersion of said particles.

An abrasion-resistant aluminum alloy consisting of 13.0 to 16.0 percent by weight of Si, 4.0 to 5.0 percent by weight of Cu, at least 0.8 and less than 1.4 percent by weight of Mg, at least 0.2 and not more than 0.8 percent by weight of Fe, not more than 0.1 percent by weight of either P or at least one of Na, Sb and Sr, not more than 0.5 percent by weight of Mn or Ni, and a remainder of Al and unavoidable impurities, wherein said alloy has a microstructure containing coarse Si particles of 15 to 40 .mu.m mean particle diameter, fine Si particles of not more than 5 .mu.m mean particle diameter and other fine particles comprising a metallic compound comprising at least one of Al, Si, Cu, Mg and Fe, with a homogeneous dispersion of said particles.