放电参数对PCD表层材料微观结构影响的实验研究  

Experiment Research of The Electrical Discharge Machining Parameters Effected on microstructure of Polycrystalline Diamond

作　　者：卢学军[1,2,3] 贾云海[2] 冯利斌[1,2] 李建钢[1] 赵占海 

机构地区：[1]北京迪蒙特佳工模具技术有限公司,北京100191 [2]北京市电加工研究所,北京100191 [3]中国矿业大学,北京100083

出　　处：《电加工与模具》2009年第6期14-17,共4页Electromachining & Mould

摘　　要：通过调整电火花成形加工的主要放电参数,对聚晶金刚石(PCD)样品进行放电加工。进而对样品进行X射线衍射分析,并在扫描电子显微镜下观察其表层结构。弄清了放电加工后PCD表面变质层的主要成分及其产生的原因,分析了脉冲宽度和加工电流对PCD表面变质层深度、表面粗糙度的影响。为制定PCD放电加工工艺提供了重要的实验依据。The samples of polycrystalline diamond（PCD） were discharge machined by adjusting the main parameters of electrical discharge machining. After the machining, these samples were analyzed by using X-ray diffraction analyzer and observed surface layer microstructure by using scanning electronic microscope. The fundamental component of machined PCD affected layer was obtained and the reason of bring affected layer was analyzed. The relationship curves between impulse width or working electric current and depth affected layer or the ratio of surface roughness were summarized. These researches provide impotent test reference for drawing up technics of PCD discharge machining.

关 键 词：电火花加工 放电参数 聚晶金刚石(PCD) 变质层 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]