7050铝合金表面亚微米晶层摩擦磨损性能  

Wear Performance of the Micro-crystallization Layer on the Surface of 7050 Al Alloy

作　　者：杨祥伟[1] 揭晓华[1] 曾旭钊 林焕立 黄展原 

机构地区：[1]广东工业大学材料与能源学院,广州510006 [2]广东巨轮股份有限公司,广东揭阳515500

出　　处：《中国表面工程》2011年第3期38-42,F0003,共6页China Surface Engineering

基　　金：广东省教育部产学研结合项目(2009B090300119)

摘　　要：采用增压喷丸方式在7050铝合金表面制备了亚微米晶层,观察并分析了亚微米晶层的组织结构,测试了喷丸前后的硬度,研究了亚微米化前后以及亚微米化后经退火处理3种状态下7050铝合金表面的滑动磨损特性,结果表明：由于增压喷丸使7050铝合金表面发生了严重的塑性变形而形成了一层厚度为30~40μm的亚微米晶层,硬度比未喷丸材料提高了2倍,喷丸后材料的磨损失重量明显减少,约为未喷丸处理试样的一半,特别是喷丸后经过退火的材料磨损量更小,表现出良好的耐磨性能。The micro-crystalline layer on the surface of 7050 Al alloy was obtained by the added-pressure shot peening process.The microstructure features of the surface layer were characterized.The micro-hardness of samples before and after the shot peening was measured.Sliding wear performance of 7050 Al alloy was studied on the three kinds of conditions of untreated,shot peening and after shot peening with annealing.The results showed that after shot peening treatment,serious plastic deformation of 7050 Al alloy was produced and formed micro-crystallization layer with the thickness about 30~40 μm.The micro-hardness rasied 2 times more than that of untreated samples.Wear loss Samples with shot peening decreased with half of the untreated samples,and after annealing of samples with shot peening,wear loss was even becoming more smaller,which showed good wear performance.

关 键 词：增压喷丸 表面亚微米化 7050铝合金 滑动磨损性能 

分 类 号：TG175.3[金属学及工艺—金属表面处理] TG115.58[金属学及工艺—金属学]