激光熔覆表面的冲蚀磨损及分形特征  

EROSION WEAR AND FRACTAL CHARACTER OF SURFACE BY LASER CLADDING

作　　者：邹鸿承[1] 戴蜀娟[1] 李国清[1] 李光霞[1] 

机构地区：[1]华中理工大学

出　　处：《兵器材料科学与工程》1996年第4期45-51,共7页Ordnance Material Science and Engineering

摘　　要：研究表明，运用激光熔覆的方法在基材表面上涂上一定含量的Ｎｉ包ＷＣ粒子合金粉末层，具有１６Ｍｎ基材２．２倍的相对耐冲蚀性能，对冲蚀表面分析表明冲蚀表面是一个分形结构，冲蚀磨损的体积冲蚀率与靶材磨损表面的分形维数呈负斜率的直线关系，并且可以用两种不同的分形维数来描述冲蚀磨屑的几何不规则性和碎片性，且两者具有不同的物理意义。Relative erosion wear resistance of cladding layer which contains Ni-based WC particles by laser processing is 2.2 times as that of 16Mn base material. Analysis of erosive surface indicates that the erosive surface is a fractal structure.The volume erosive ratio of erosive wear surface is inverse proportion to the fractal dimension of erosive wear surface.The irregular geometric and fragmentation of erosive fillings can be described with two different fractal dimension,which have their different physics respectively.

关 键 词：冲蚀磨损 激光熔覆 分形维数 金属表面处理 

分 类 号：TG178[金属学及工艺—金属表面处理] TG156.99[金属学及工艺—金属学]