加工碳/碳复合材料的复合金刚石涂层刀具的制备及切削试验研究  

Preparation and Cutting Test of Composite Diamond Coated Tools for Processing C/C Composites

作　　者：郭振海 邓福铭[1] 赵鑫 宋美娇 张磊 向道辉[2] GUO Zhen-hai;DENG Fu-ming;ZHAO Xin;SONG Mei-jiao;ZHANG Lei;XIANG Dao-hui(Institute of Super-Hard Cutting Tool Materials,China University of Mining and Technology(Beijing),Beijing 100083,China;School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]中国矿业大学(北京)超硬刀具材料研究所,北京100083 [2]河南理工大学机械与动力工程学院,河南焦作454003

出　　处：《材料保护》2020年第12期1-5,12,共6页Materials Protection

基　　金：国家自然科学基金项目(51172278);教育部博士点基金(20120023110016)资助。

摘　　要：为了更高效地加工碳/碳复合材料,在硬质合金刀具上采用热丝CVD法(HFCVD)沉积了微米纳米复合金刚石(micro-nanocrystalline composite diamond,MNCD)薄膜,即先在基体表面沉积一层微米金刚石(microcrystalline diamond,MCD)薄膜,然后不间断地原位沉积一层纳米金刚石(nanocrystalline diamond,NCD)薄膜。通过扫描电子显微镜和拉曼光谱仪对MNCD薄膜的形貌和质量进行表征,利用切削试验研究了MCD涂层刀具、MNCD涂层刀具和硬质合金刀具的切削性能。结果表明:涂覆的MNCD薄膜质量很高,横断面上微米金刚石颗粒以柱状晶的方式生长,纳米金刚石颗粒以堆叠的方式生长,两者之间有明显的界限;切削试验中,MNCD涂层刀具由于具有MCD薄膜的膜基结合力好的优点,同时又兼有NCD薄膜表面摩擦系数小的优点,在3种刀具中表现良好;可以看出,MNCD薄膜可极大地提升工具的切削性能,延长刀具的使用寿命。For investigating an efficient approach to process carbon/carbon composites,a micro-nanocrystalline composite diamond(MNCD)film was deposited on cemented carbide tool by hot filament chemical vapor deposition(HFCVD).Firstly,a layer of microcrystalline diamond(MCD)film was deposited on the substrate surface,and then a layer of nanocrystalline diamond(NCD)film was deposited continuously in situ.Scanning electron microscope and Raman spectrometer were used to characterize the morphology and quality of the MNCD film.The cutting performance of the MCD coated tool,MNCD coated tool,and uncoated cemented carbide tool were studied by cutting experiment.Results showed that the MNCD thin film was of high quality,the microcrystalline diamond particles grew in columnar crystal manner on the cross-section while the nanocrystalline diamond particles grew in stacked manner,and there was an obvious dividing line between them.In the cutting experiment,the MNCD coated tool exhibited the best cutting performance among the three tools due to possessing the advantages of good filmsubstrate cohesion like the MCD film and the low surface friction coefficient like the NCD film.From the above,the MNCD film could significantly improve the cutting performance of tools and extend their service life.

关 键 词：碳/碳复合材料 微纳米复合金刚石薄膜 HFCVD 切削试验 刀具磨损 

分 类 号：TG174.44[金属学及工艺—金属表面处理]