两种预处理对硬质合金金刚石涂层附着力的影响对比研究  

STUDY ON A COMPARISION OF TWO KINDS OF PRETREATMENT EFFECTS ABOUT THE ADHESION OF THE CEMENTED CARBIDE DIAMOND COATING CUTTERS

作　　者：苗晋琦[1] 宋建华[1] 赵中琴[1] 杨志威[1] 佟玉梅[1] 唐伟忠[1] 吕反修[1] 

机构地区：[1]北京科技大学材料科学与工程学院,中国北京100083

出　　处：《金刚石与磨料磨具工程》2003年第4期5-8,共4页Diamond & Abrasives Engineering

摘　　要：制约金刚石薄膜涂层工具走向市场化的关键问题是金刚石薄膜与硬质合金衬底的附着力低。困难来自于硬质合金的粘结相钴。消除钴对涂层附着力不利影响的措施很多。其中 ,真空渗硼和施加铜过渡层处理是两种较为有效的方法。本实验的目的就是要比较两种预处理对金刚石涂层附着力的影响。我们利用强电流直流伸展电弧等离子体CVD设备对真空渗硼和施加铜过渡层处理的刀片同时进行了金刚石薄膜沉积。通过激光喇曼、压痕和切削实验对其涂层的附着力进行分析、对比。结果表明 ,真空渗硼和施加铜过渡层处理均可有效地提高硬质合金金刚石涂层的附着力(未处理试样涂层的附着力 <60 0N。施加铜过渡层处理试样附着力 <15 0 0N ,真空渗硼预处理试样附着力≥ 15 0 0N)。但两者相比较而言 。The key, which restricts the diamond coating tools from market applications, is the low adhesion between diamond coatings and cemented carbide substrates The main problem is from Co binder phase in cemented carbide There are many ways to eliminate the adverse effect of Co for diamond deposition Among them, vacuum boronizing and Cu interim layer pretreatment are two most effective ways Our goal is to compare the effect of the two methods on adhesion of CVD diamond coatings on cemented carbide substrates We deposited the diamond films in the high current extended arc plasma equipment for the YG6 cutting tools of vacuum boronizing and Cu interim layer pretreatment And then we analysed and compared the adhesion of their coating by means of Raman,SEM,pressure mark and cutting test The result shows that two ways both improve the adhesion(The adhesion<600N, <1500N,≥1500N, for non pretreated sample, Cu interim layer sample, vacuum boronizing sample, respectively ) of the diamond coating However, The vacuum boronizing pretreatment has better effect as compared with Cu interim layer way

关 键 词：预处理 等离子体 金刚石涂层 附着力 硬质合金 金刚石薄膜 工具 

分 类 号：TG7[金属学及工艺—刀具与模具] TB43[一般工业技术]