一种采用电火花加工技术的表面改性方法  

Study on surface modification by using electrical discharge machining

作　　者：方宇[1] 赵万生[1] 王振龙[1] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《哈尔滨轴承》2005年第1期46-50,共5页Journal of Harbin Bearing

基　　金：国家自然科学基金(50275038)

摘　　要：研究了一种在普通电火花加工机床上实现金属工件表面改性的新方法。它是在传统电火花加工方法的基础上,通过特制的半烧结体电极,在电火花加工过程中能够在工件表面迅速形成一层硬质碳化物陶瓷,从而达到改善工件表面性能的目的。对这种方法的原理进行了初步的探讨,并在大量实验的基础上,通过厚度测量、硬度梯度测试、X射线衍射分析等一系列实验手段,对沉积层的生成特性进行了详细的分析。最后利用本方法在普通的高速钢车刀上进行了初步应用。试验与分析表明,用电火花加工的方法进行金属表面沉积陶瓷层技术是一种极具潜力的表面改性方法。A new method of surface modification by ordinary Electrical Discharge Machining (EDM) tool is de scribed. On the basis of ordinary EDM method, a hard ceramic layer can be deposited on the workpiece surface quickly with special semi-sintered electrode in the process of EDM, so the surface property of the workpiece is improved. First, the principle of this surface modification method is shown. Secondly, through a series of measurements including of the measurement of layer thickness, the test of hardness and the analysis of X-ray diffraction, the characteristics of the layer are discussed in detail. At last, its application to the cutting tools is also discussed. The tests and analysis show this new surface modification technology by EDM is a very potential method.

关 键 词：表面改性方法 加工技术 电火花加工机床 X射线衍射分析 碳化物陶瓷 高速钢车刀 金属工件 加工方法 工件表面 加工过程 表面性能 厚度测量 硬度梯度 实验手段 生成特性 表面沉积 烧结体 沉积层 分析表 陶瓷层 基础 

分 类 号：TG661[金属学及工艺—金属切削加工及机床] TB383[一般工业技术—材料科学与工程]