摘要
采用销-盘摩擦磨损试验机,考察了高体积分数SiCP/Al复合材料中颗粒尺寸及颗粒级配等组织因素对材料干摩擦磨损性能的影响。通过磨损表面的SEM形貌分析,研究了复合材料的磨损机理。结果表明,与灰铸铁配副时,材料的摩擦系数与磨损率明显依赖于碳化硅颗粒尺寸,二者均随颗粒尺寸的增大而先降低后增大。采用颗粒级配方法能明显改善复合材料的干摩擦磨损性能。粗细颗粒间的级配具有相互强化的作用,有利于降低摩擦系数和磨损率,并使其趋于稳定。复合材料的磨损以对偶件材料的转移和犁沟为特征。
Using pin-on-disk tribometer, the influence of microstructure factors of the high volume fraction SiCp/Al composites, such as particle size and matching particles on dry friction and wear properties of the composites were investigated. The wear mechanism of the composites was studied with the analysis of the worn surface by SEM. It shows that the dry friction and wear performance of SiCp/Al composites were improved obviously by particles size-grading. The mixture of different sizes of SiC particles can make them strengthen each other, it can help to reduce friction coefficient and wear rate of the composites, and the wear performance tends to be stable. When grinding with gray cast iron, friction coefficient and wear rate of the composites greatly depend on the particle size. Both of them firstly decrease and then increase with the increase of the particle size. Finally, wear performance of the composites has the features of matching material transformation and plough.
出处
《热加工工艺》
CSCD
北大核心
2009年第10期125-127,共3页
Hot Working Technology
