金属纤维增强型摩擦材料与灰铸铁滑动摩擦性能  

Properties of metal fibers reinforced friction materials and grey cast iron friction couple

作　　者：苏堤[1] 黄伯云[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2007年第4期583-588,共6页Journal of Central South University:Science and Technology

基　　金：国家科技部高技术产业化引导项目(2003AA001033)

摘　　要：采用X射线衍射（XRD）和X射线能谱分析（EDAX）对分别使用低炭钢纤维、黄铜纤维和紫铜纤维增强的3种半金属摩擦材料与灰铸铁在不同温度下滑动摩擦形成的磨屑进行分析,并结合扫描电子显微镜（SEM）观察摩擦材料表面形貌,分析材料的磨损特性,并对黄铜纤维和紫铜纤维增强的摩擦材料磨屑成分进行对比分析。XRD结果表明,钢纤维增强体系的摩擦材料磨屑中的主要相是α-Fe,BaSO4,FeCr2O4（或Fe3O4,Fe2O3）;黄铜和紫铜纤维增强体系的磨屑中主要相除钢纤维体系中含有的相外,还含有Cu。EDAX分析的结果与X射线物相分析的基本一致,钢纤维增强材料磨屑中的Fe原子数分数达50%-60%,Cu,Ba,Ca和Al等元素的原子数分数为6%-10%。Fe原子含量均较高,在紫铜纤维增强的材料中其他元素的原子含量都比黄铜纤维增强的材料中的浓度低,说明紫铜纤维增强的摩擦材料的磨损比黄铜纤维增强的摩擦材料的小,填料不容易脱落,但紫铜纤维增强的摩擦材料对对偶造成的损伤较大。The wear debris of three semi-metallic friction materials reinforced by low carbon steel fiber, brass fiber and pure copper fiber respectively, and grey cast iron couple woren at different temperatures were studied by XRD and EDAX. Wear properties were analyzed together with the surface images got by scanning electron microscope（SEM）. The results of X-ray diffraction analysis indicate that the main constitution phases of the wear debris for that reinforced by steel fibers are α-Fe, BaSO4, FeCr2O4（also maybe Fe3O4 or Fe2O3）, and that for those reinforced by brass and pure copper fibers, there is Cu in addition. EDAX result shows that the most element of the wear debris for the material reinforced by steel fibers is Fe whose atomic concentration adds up to 50%-60%, and the atomic concentrations of other elements, such as Cu, Ba, Cr, Al, are 6%-10% respectively. Comparing the atomic concentration of the wear debris for material reinforced by brass fiber with that by pure copper fiber, Fe concentrations are both relatively high and most of the elements except Fe in the latter is lower than that in the former. The wear for material reinforced by pure copper is lower than that by brass material, while the former tends to hurt the opponent more.

关 键 词：摩擦 磨损 磨屑 钢纤维 铜纤维 半金属摩擦材料 

分 类 号：TB323[一般工业技术—材料科学与工程] TF125.9[冶金工程—粉末冶金]