摘要
采用粉末热挤压工艺制备硼酸镁晶须增强铝基复合材料,研究了晶须含量和载荷的变化对材料摩擦磨损性能的影响。结果表明,在恒定的速度和载荷下,硼酸镁晶须体积含量为2%时耐磨性最好,其磨损率为纯6061铝合金磨损率的62%。随着载荷的增大,复合材料的磨损率增加,并且高体积含量的复合材料磨损率呈现出更大的增加趋势。磨损表面分析表明:在较低负载下,6061铝合金的磨损机制以磨粒磨损为主,复合材料的磨损机制以轻微的粘着磨损为主;在较高负载时,6061铝合金和复合材料的磨损机制均由粘着磨损和磨粒磨损共同主导。
The Mg2B2O5 whisker reinforced aluminum-matrix composites were prepared by powder hot extrusion process,the effect of Mg2B2O5 whisker content on friction and wear properties of the composites were researched. The results show that, at the constant speed and load, its wear resistance is best when the volume content of Mg2B2O5 whisker is 2%, the wear rate is only 62% of 6061 aluminum alloy. With the increase of the load, the wear rate of the composite increases, and in high volume content, the wear rate of the composites show increasing trend. The analysis of worn surfaces reveal that the wear mechanism of 6061 aluminum alloy is dominated by abrasive wear, the wear mechanism of the composites is dominated by adhesive wear under the condition of low load. The wear mechanism of 6061 aluminum alloy and the composites are dominated by adhesive wear and abrasive wear under the condition of high load.
出处
《铸造技术》
CAS
北大核心
2016年第6期1095-1099,1109,共6页
Foundry Technology
关键词
粉末热挤压
硼酸镁晶须
铝基复合材料
摩擦磨损
hot extrusion powder
Mg2B2O5whisker
aluminum matrix composites
friction and wear
