Abstract
Wear resistance of an Al-Mg-Si alloy is effectively improved by adding approximately 4%Cu and 1.2%Mn. Wear resistance of high concentrated solid solution of Al-Cu-Mg-Si and Al-Cu-Mn-Mg-Si alloys is better than that of low concentration. Primary inclusion is preferable for wear resistance of thease alloys. An addition of approximately 4%Cu and 1.2%Mn to a hypereutectic Al-Si-Mg alloy is also effective to improve the wear resistance. Wear resistance of an Al-Si-Cu-Mn-Mg alloy is significant influenced rather by the grain size of primary silicon than by silicon content. Wear resistance of this alloy increases with decreasing grain size of primary silicon, but it begins to decrease beyond the size of 3.3μm.
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