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研究岩粉尺寸(10~30μm)和质量分数(5%~15%)对搅拌铸造法制备6061铝合金/岩粉复合材料密度、硬度和干滑动磨损行为的影响。在不同载荷、不同滑动速率和滑动距离条件下在销盘摩擦试验机上对复合材料进行干滑动摩擦磨损试验。采用Taguchi法进行正交试验(L27)设计,并对实验结果进行方差分析。结果表明,载荷和增强相(岩粉)尺寸是影响复合材料样品比摩损率的主要因素,其次为增强相的质量分数、滑动速率、滑动距离,且其影响程度分别为47.61%、28.57%、19.04%、9.52%和4.76%。对所得回归方程的预测精度进行实验论证,结果显示,此回归方程能用于复合材料的磨损率的预测且预测误差很小。复合材料磨损表面的SEM结果表明,以岩粉作为增强相能改善铝合金材料的耐磨性能。
The effects of rock size (10 ~ 30μm) and mass fraction (5% ~ 15%) on the density, hardness and dry sliding wear behavior of 6061 aluminum alloy / rock powder composites prepared by the stirring casting method were investigated. Under different load, different sliding rate and sliding distance condition, the dry sliding friction and wear test of the composite was done on the pin plate friction tester. The Taguchi method was used to design the orthogonal experiment (L27), and the variance of the experimental results was analyzed. The results show that the load and the size of the reinforcing phase (rock powder) are the main factors that affect the specific wear rate of the composite sample, followed by the mass fraction, sliding velocity and sliding distance of the reinforced phase, and the influence degree is 47.61% and 28.57% , 19.04%, 9.52% and 4.76% respectively. The experimental results show that the regression equation can be used to predict the wear rate of composite materials and the prediction error is small. The results of SEM on the wear surface of composite material show that the wear resistance of aluminum alloy material can be improved by using rock powder as reinforcing phase.