不同磨粒含量下过共晶成分铝锰基复合材料的冲蚀磨损性能

The Erosion Wear Properties of Hypereutectic AI--Mn Matrix Composite under Different Abrasive Contents

采用MSH型磨损试验机将过共晶成分Al—Mn合金及A1203颗粒增强过共晶成分铝锰基复合材料在3．5m／s速度下进行不同磨粒粒度和不同磨粒含量的冲蚀磨损试验，分析了两种材料的组织结构，并对材料的失重率、抗冲蚀磨损性能、微观失效表面形貌进行了研究和讨论。结果表明：两种材料的冲蚀磨损失重率随着磨粒含量的增加明显增大；在3％磨粒加入量下二者的失重率随着磨粒粒度的增大均呈现出先增大后减小的趋势，且随着磨粒含量的增加两种材料在较大粒径下出现增重的现象消失。此外，在锰含量相近的条件下A120s颗粒增强过共晶成分铝锰基复合材料的抗冲蚀磨损性能优于过共晶成分铝锰合金。

The erosion wear of Hypereutectic A1--Mn alloy and its composite reinforced by Alz Oa particulates manganese erosion tests were carried out by MSH type erosion tester in different particle size and different under 3.5m/s. Microstructure of the two materials were analyzed, and the test material weight loss, anti--erosion properties, surface morphology of micro-- failure were studied and discussed. The results show that the wear weight loss rate of the two materials were increased significantly when the abrasive contents increasing. The wear loss and then decrease with the increase of abrasive particle size. gain disappears. Compared with those of the A1--Mn alloy hypereutectic composition Alz 03 particle reinforced A1--Mn- excellent. rate of the two materials with 3% abrasive contents first increase And increased with added abrasive , the phenomenon of weight hypereutectic composition the erosion resistance performance of -based composites with similar manganese contents is much more