脉冲电沉积纳米晶镍在金刚石工具制造中的应用研究  

Application Study of Nano-Nickel Coating Produced by Pulse Electrodeposit in Manufacture of Diamond Tool

作　　者：李照美[1] 张玉碧[1] 李云东[1] 

机构地区：[1]河南农业大学机电工程学院,河南郑州450002

出　　处：《中国表面工程》2005年第5期43-46,共4页China Surface Engineering

摘　　要：采用watt镀液通过脉冲电沉积制得纳米镍沉积层。通过扫描电镜(SEM)、X射线衍射(XRD)分析了沉积层的表面形貌、结构和晶粒大小与脉冲参数的关系,分析表明:微观形貌为胞状结构,平均晶粒尺寸为10.3nm;随着占空比的减小,晶粒得以细化。研究了脉冲参数对纳米镍层显微硬度、抗拉强度的影响,最大拉伸强度大900MPa,为常规镍镀层的2.5倍;通过正交法得到最佳制造金刚石工具的脉冲参数,磨削加工试验显示,平均寿命为常规镍的1.5倍。Nano-crystal Nickel deposits were obtained by the traditional Watt nickel plating technique using pulse electro deposition. The relationship between pulse parameters and the morphology and texture of the Ni- coatings was studies by means of SEM and XRD. The analysis results showed that the micro-morphology displays a lumpy structure, the mean grain size is 10.6nm. With the decrease of duty cycle, the grain size is falling. The effect of pulse parameters on micro-hardness and tensile strength were investigated, the results showed that the biggest micro-hardness and tensile strength can reach to 591 HV and 900Mpa, about 4 and 2.5 times that of normal nickel layer. The optimized pulse parameters were obtained by the orthogonal experiments and had been applied in the manufacture of diamond tool successfully.

关 键 词：纳米晶镍 脉冲参数 抗拉强度 金刚石工具 

分 类 号：TG174.441[金属学及工艺—金属表面处理]