摘要
采用快速升温热压法制备了20%Grp/6061Al(质量分数,下同)复合材料并研究其摩擦磨损特性,通过光学显微镜和SEM分别观察了样品的组织结构及磨痕形貌,采用XRD分析了复合材料的相组成。研究表明:快速升温热压能避免有害的界面反应,得到石墨颗粒分布均匀、界面干净且结合良好的Grp/6061Al复合材料,复合材料具有良好的摩擦磨损性能,T6处理能显著降低复合材料的摩擦系数和磨损率。在60r/m转速、1N～7N载荷下,复合材料的摩擦系数随载荷的增大而减少,磨损量增大。T6热处理强化了界面结合,有利于石墨膜形成,降低了复合材料的摩擦系数,也显著减少了磨损率。热处理后,复合材料摩擦系数可达到0.16,磨损量平均减幅达50%,采用的最大载荷7N下磨损率可减少到4.7×10-4mm3/m。
20 wt% Grp/6061Al composite was prepared by hot pressing at rapid heating-up rate, and its tribological characteristics were studied. The microstructure and worn surface were observed by optical microscope and SEM respectively, XRD was applied to analyze the phase contents. The results show that hot pressing with rapid heating-up rate can avoid interface reaction and ensure strong interface bonding and uniform microstructure, and the 20 wt% Grp/6061Al composite exhibits low friction coefficient and wear rate. The friction coefficients of the composites decrease with raising of the normal loads due to the formation of graphite lubricant film. T6 heat treatment can strengthen the interface bonding and maintain the graphite lubricant film, so it has beneficial effect on the composite, the friction coefficient and wear rate decrease by 50% in average. The friction coefficient and wear rate of 20 wt% Grp/6061Al composites can get to 0.16 and 4.7 × 10^-4 mm^3/m at 7 N normal load respectively.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第9期1479-1482,共4页
Rare Metal Materials and Engineering
