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采用往复式摩擦磨损试验机对铸态和T6态Mg-11Y-5Gd-2Zn合金进行干摩擦磨损试验,研究载荷(3~15N)、磨擦速度(0.03~0.24m/s)、摩擦温度(25~200 °C)对合金磨损率的影响,并通过扫描电镜观察合金磨损表面形貌和磨屑。结果表明:随着载荷的增加,合金的磨损率几乎呈线性增加;随着摩擦速率的增加,合金的磨损率降低;铸态合金的磨损率高于T6态合金的。Mg-11Y-5Gd-2Zn合金中的Mg12Y1Zn1相、表面氧化相和残留的磨屑影响合金的磨损率。在本试验条件下,磨损机制主要是粘着磨损和塑性变形。
Dry friction and wear tests of the as-cast and T6 Mg-11Y-5Gd-2Zn alloys were carried out with a reciprocating friction and wear tester. The effects of load (3-15N), friction speed (0.03-0.24m / s), friction temperature ~ 200 ° C) on the wear rate of the alloy, and the wear surface morphology and wear debris of the alloy were observed by scanning electron microscopy. The results show that the wear rate of the alloy increases almost linearly with the increase of the load. The wear rate of the alloy decreases with the increase of the friction speed. The wear rate of the as-cast alloy is higher than that of the T6 alloy. The Mg12Y1Zn1 phase in Mg-11Y-5Gd-2Zn alloy, the surface oxidation phase and the residual wear debris affect the wear rate of the alloy. Under the experimental conditions, the wear mechanism is mainly adhesive wear and plastic deformation.