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采用MSH型旋转冲蚀磨损试验机对比研究了磨料粒度、磨料含量对共晶成分铝锰合金及其复合材料的冲蚀磨损性能影响,分析了试样材料的组织特征及冲蚀磨损后磨痕形貌。结果表明:铝锰合金材料的铸态组织为锰在铝中的固溶体及铝锰化合物,而铝锰基复合材料中除与铝锰合金相近的基体上还存在着δ-Al2O3,且δ-Al2O3颗粒的加入改变了铝锰化合物在基体中的分布;试样材料的冲蚀磨损率随磨粒粒度增大呈先增大后减小趋势,峰值向粒度增大的方向偏移;冲蚀磨损率随磨粒含量加入量增加而增大;与铝锰合金相比铝锰基复合材料的冲蚀磨损率较低,因此其具有优良的抗冲蚀磨损特性。
The effect of abrasive grain size and abrasive content on erosive wear properties of eutectic composition Al-Mn alloy and its composites was studied by using MSH rotary erosion wear tester. The microstructure and erosion characteristics of the samples were analyzed. Topography The results show that the as-cast microstructure of the aluminum-manganese alloy is solid solution of manganese in aluminum and the compound of aluminum-manganese, while δ-Al2O3 exists in the matrix of aluminum-manganese-based composite and δ-Al2O3 The addition of particles changed the distribution of Al-Mn compounds in the matrix. The erosion wear rate of the samples increased first and then decreased with the increase of the particle size of the particles, and the peak value shifted to the direction of increasing the particle size. The rate increases with the addition of abrasive content. The erosion wear rate of Al-Mn-based composite is lower than that of Al-Mn alloy, so it has excellent erosion-wear resistance.