Abstract
Wear resistance of Al-Si alloy is increased with increasing the silicon content at low sliding speed, and severe scuffing wear occurs easily in the hypo-eutectic Al-Si alloy at high sliding speed or high load. However, desirable oxide wear by protective oxide film formed during slide is more remarkable in the hypo-eutectic Al-Si alloy than that of eutectic or hyper-eutectic alloy. An addition of Mg or Cu to Al-Si alloy is effective to improve the wear resistance but Cu is more effective than Mg. Wear resistance of AC4B is superior to AC4C, and that of AC4B is nearly same as AC8C or ADC 12. T6 treatment gives rather unpreferable effect for wear resistance of these alloys. Lubrication gives a notable effect to protect the sliding-wear of aluminum and its alloys.
