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采用搅拌铸造法制备了Al2O3颗粒增强Al-2%Mn合金基复合材料,对复合材料的显微组织、硬度和摩擦磨损性能进行了研究。结果表明:复合材料组织由Al基体、δ-Al2O3和MnAl6相组成,且Al2O3颗粒在铝基体中弥散分布。与原始铝基体相比,复合材料的布氏硬度提高了约70%。无论是干摩擦还是SO4.Cl-Na.Ca.Mg型弱碱性水溶液润滑摩擦情况下,复合材料的磨损量均显著低于铝基体。与铝锰合金相比,复合材料具有较低的冲刷腐蚀失重速率。复合材料具有优良的耐磨和耐蚀性。
Al2O3 particles reinforced Al-2% Mn alloy matrix composites were prepared by stirring casting method, and the microstructure, hardness and friction and wear properties of the composites were studied. The results show that the composites consist of Al matrix, δ-Al2O3 and MnAl6 phases, and the Al2O3 particles are dispersed in the Al matrix. The Brinell hardness of the composites is increased by about 70% compared to the original aluminum matrix. Whether it is dry friction or SO 4 Cl-Na.Ca.Mg type weak alkaline aqueous solution under the conditions of friction and friction, the wear amount of the composite material is significantly lower than the aluminum matrix. Composites have a lower erosion rate of erosion than aluminum-manganese alloys. Composite materials have excellent wear and corrosion resistance.