Al_2O_3颗粒增强共晶铝锰基复合材料的腐蚀磨损性能  

Corrosive Wear Properties of Al-Mn Eutectic Alloy Reinforced by Al_2O_3 Particle

作　　者：杨唐[1] 刘炳[1] 文锋[1] 郭璐[1] 赵明露[1] 

机构地区：[1]新疆大学机械工程学院,乌鲁木齐830008

出　　处：《材料工程》2013年第3期83-89,共7页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(50861008)

摘　　要：选择铝锰共晶合金及其复合材料作为研究对象,用XRD,SEM,EDS分析试样。首先分析了试样的金相组织,再分析了它们在三种摩擦条件下的磨损失重、摩擦因数及磨痕形貌,最后分析其耐冲蚀性能。结果表明:Al2O3颗粒的加入改变了铝锰化合物的形态;试样在仅有腐蚀液条件下的磨损量和摩擦因数最大,在有腐蚀液加磨粒条件下次之,在干摩擦条件下最小;从磨痕形貌可知在仅有腐蚀液条件比在腐蚀液磨粒条件有更多的凹坑,在腐蚀液磨粒条件比干摩擦条件有更深的犁沟。在7m/s冲蚀速度下,冲蚀试样的磨损率随磨粒粒径的增大呈先增大后减小的趋势;在3.5m/s下,磨损率随磨粒粒径的增大而逐渐减小,合金在0.15～0.212mm粒径下实验后出现'增重'现象。The metallographic structures of XRD and SEM. The mass loss, friction co three different kinds of friction conditions. A1-Mn eutectic alloy and its composi efficient and wear trace of the samp And their properties of erosion resis te were investigated by les were studied under tance were analyzed by SEM and EDS. The results show that the shapes of brittle A1-Mn compounds are changed as A1203 particle is added. The mass loss and friction coefficient of the samples under corrosive liquid and abra- sive condition are less sliding condi rosive liquid tion. The than those under corrosive pits of samples under corros and abrasive condition, condition are deeper than those under size of abrasive increases, wear rates sion speed, but decrease gradually in increase after the erosion test under t tion. and the fu dry slidin of erosion 3.5m/s. I he 3.5m/s rro liquid condition, but higher than those under dry ive liquid condition are more than those under cor- ws of samples under corrosive liquid and abrasive g condition by observing wear traces. As the particle samples increase first and then decrease in 7m/s ero- n addition, the mass of A1-Mn eutectic alloy samples erosion speed and 0.15-0. 212mm particle size condi-

关 键 词：金相组织 腐蚀磨损机制 铝锰合金 复合材料 

分 类 号：TG146.2[一般工业技术—材料科学与工程]