中文摘要：

采用旋转冲蚀磨损试验研究了在7m·s^-1。和15m·s^-1冲蚀速度下Al-2．15％Mn合金和Al2O3颗粒增强Al-2．06％Mn合金基复合材料的冲蚀磨损性能，分析了材料的组织特征及冲蚀磨损后的表面形貌。结果表明：Al-2．15％Mn合金组织由锰在铝中的固溶体及铝锰化合物（MnAl6和Al11Mn4相）组成；复合材料的组织在前者基础上，增加了Al2O3颗粒；两种材料在15m·s^-1冲蚀速度下的冲蚀磨损率是7m·s^-1下的20-30倍，冲蚀速度是影响磨损率的主要因素；两种材料在磨料加入量为3％时的磨损率均高于1％时的，且随磨料粒径的增加冲蚀磨损率均先增大后减小；在3%磨料加入量下，其冲蚀磨损率极大值均随冲蚀速度的增加向大粒径方向移动；均匀分布于基体中的Al2O3颗粒能起到弥散强化的作用，因此复合材料表现出更优良的抗冲蚀性能。

英文摘要：

The erosion-abrasion wear properties of euteetic AI-Mn alloy and its AlcOa particle reinforced composites were studied at erosion-abrasion rate of 7 m · s^-1 and 15 m · s^-1 in rotating erosion-abrasion wear test, and the microstructure characteristics and the worn surface of the materials after erosion-abrasion wear test were analyzed. The results show that, the cast A1-Mn alloy was composed of AI-Mn solid solution, MnA16 and Aln Mn, phase, while Al2O3 particles appeared in the composite besides the aforementioned microstructure. The wear rate at the erosion--abrasion rate of 15 m ·s ^-1 was 20 to 30 times as large as the wear rate at the erosion-abrasion rate of 7 m ·s ^-1for two materials. And the major factor of wear rate was erosion-abrasion rate. The wear rates of both materials were higher with 3~ abrasive addition than with 1% abrasive addition, and exhibited increase first then decline with increase of abrasive diameter. The maximum wear rate moved toward the abrasive in larger diameter with increase of erosion-abrasion rate when abrasive addition was 1%. The Al2O3 particle reinforced composite exhibited a good erosion-abrasion wear resistance because of dispersion strengthening of Al2O3 particles distributed uniformly in matrix at same erosion-abrasion conditions.