Al-2.15%Mn合金的组织及摩擦学特性  

Microstructure and Tribological Performance of Al-2.15%Mn Alloy

作　　者：赵明露[1] 刘炳[1] 高填[1] 

机构地区：[1]新疆大学机械工程学院,乌鲁木齐830047

出　　处：《西安交通大学学报》2012年第9期119-124,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50861008)

摘　　要：采用搅拌法制备了Al-2.15%Mn合金,对其显微组织、强化机制及摩擦磨损性能进行了试验研究.结果表明:Al-2.15%Mn合金的组织为含Al11Mn4和Al6Mn的α-Al固溶体;合金中Al6Mn的沉淀强化作用使其硬度较纯Al提高了60%;纯Al的冲击断口形貌为塑性断裂,Al-2.15%Mn合金的冲击断口形貌为准解理断裂;纯Al与Al-2.15%Mn合金在湿摩擦下的磨损量均大于干摩擦的磨损量;湿摩擦的腐蚀-机械磨损作用使磨痕为犁沟和蚀坑,干摩擦中磨屑的成片脱落由机械磨损中的黏着磨损引起;在干摩擦与湿摩擦中,纯Al的摩擦因数均大于Al-2.15%Mn合金的摩擦因数,Al-2.15%Mn合金较纯Al表现出更加优良的耐磨性.Al-2.15% Mn alloy was fabricated by stirring casting. Its microstructure, strengthening mechanism, and friction and wear behavior were investigated. The results show that： 1） The as-cast microstructure of Al-2.15% Mn alloy is composed of a-Al matrix with Aln Mn4 and Al6Mn compounds; 2） The hardness of Al-2.15%Mn alloy gets 60% higher than that of pure aluminum because of deposition strengthening by Al6Mn; 3） The impact fractures exhibit plastic morphology for pure aluminum and quasi-cleavage morphology for Al-2.15%Mn; 4） The worn mass losses of both pure aluminum and Al-2.15 % Mn alloy under lubricating condition are greater than that under dry condition because combination of corrosion and mechanical wear in wet fric- tion condition generates furrows and corroded pits on sample surface, while adhesive wear in dry friction condition makes worn chips flake off the sample surface; 5） Al-2. 15%Mn alloy shows smaller friction coefficient and better wear resistance than pure aluminum in both wet and dry wears.

关 键 词：铝锰合金 显微组织 摩擦磨损 

分 类 号：TG146.2[一般工业技术—材料科学与工程]