The effect of Si exposure height on the wear resistance of a hypereutectic Al-Si alloy was evaluated. The wear depth of the alloy was measured using a pin-on-disk type wear tester on the kinetic viscosity of lubricant, 2.20, 22.0 and 100 mm~2/s. The Si exposure height was changed at each height of 0, 1.2, 2.4, 5.2, 7.5 mum by changing the immersing time in a NaOH solution. At the kinetic viscosity of 22.0 and 2.20 mm~2/s of the lubricant, the wear curve shows a minimum value at the Si exposure height of 1.2 and 2.4 mum, resulting in a small effect of kinetic viscosity on the lubrication of the contact area.
展开▼
