AA1050表面Al-Mg-Cu_((p))复合涂层的力学和摩擦学性能  

Mechanical and tribological behaviour of Al−Mg−Cu_((p))composite cladded on AA1050 substrate

作　　者：Hamed JAMSHIDI AVAL 

机构地区：[1]Department of Materials Engineering,Babol Noshirvani University of Technology,Shariati Avenue,Babol47148-71167,Iran

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第4期1054-1065,共12页中国有色金属学报（英文版）

摘　　要：研究添加铜粉和改变耗材转速对AA1050铝合金基体上摩擦堆焊Al-Mg涂层力学和摩擦学性能的影响。铜粉是通过在耗材的横截面上钻孔的方式嵌入的。用光学显微镜和电子显微镜研究涂层的显微组织,用剪切实验研究涂层的力学性能。结果表明,当耗材转速从600 r/min增加到1000 r/min时,铜粉分布更加均匀,铜粉团聚现象减少,涂层的平均晶粒尺寸从(2.0±0.1)μm减小到(0.9±0.2)μm。随着转速的增加,富铜颗粒变小,并形成CuAl_(2)金属间化合物。当耗材转速从600 r/min增加到1000 r/min,使涂层从基体剥离所需的最大力从16.2 kN增加到18.4kN。转速为600、800和1000 r/min制备的涂层其磨损率分别比AA1050基材的低12%、18%和21%。The effect of adding copper powder and changing the rotational speed of the consumable rod during friction surfacing of Al−Mg alloy on AA1050 aluminum substrate was investigated.The copper powder was inserted by drilling holes in the cross-section of the consumable rod.The coating microstructure was studied using optical and electron microscopy,and the mechanical properties of coatings were studied using a shear test.The results showed that with increasing the rotational speed of the consumable rod from 600 to 1000 r/min,the copper powder distribution becomes more uniform,and the agglomeration of copper powder occurs less frequently.The average grain size of coatings decreased from(2.0±0.1)to(0.9±0.2)μm by increasing the rotational speed from 600 to 1000 r/min.As the rotational speed increases,the copper-rich particles become smaller and are formed as CuAl_(2)intermetallic compounds.The maximum load required for debonding coating from substrate increases from 16.2 to 18.4 kN by increasing rotational speed from 600 to 1000 r/min.The coating with rotational speeds of 600,800,and 1000 r/min results in 12%,18%,and 21%lower wear rate than that of the AA1050 substrate,respectively.

关 键 词：摩擦面 Al-Mg基复合材料 铜增强体 力学性能 AA1050基体 

分 类 号：TG174.4[金属学及工艺—金属表面处理]