热丝化学气相沉积金刚石时温度对YG6硬质合金的影响  

Effect of Temperature on YG6 Cemented Carbide during Hot Filament Chemical Vapor Deposition Diamond

作　　者：俞力[1,2] 袁伯雅 吕继磊 诸跃进[2] 

机构地区：[1]中国科学院宁波材料技术与工程研究所海洋新材料与应用技术重点实验室浙江省海洋材料与防护技术重点实验室,浙江宁波315201 [2]宁波大学理学院,浙江宁波315211

出　　处：《热加工工艺》2017年第6期175-179,共5页Hot Working Technology

基　　金：国家国际合作专项项目(S2015ZR1100)

摘　　要：使用真空气氛滑轨管式炉将YG6刀片分别加热到750、850、950、1050℃,保温2 h,然后室温冷却。通过扫描电镜(SEM)、能谱仪(EDS)、X射线粉末衍射仪(XRD)、纳米压痕仪对硬质合金表面进行表征,并利用Image-J软件分析Co黏结相的变化。结果表明:加热后YG6表面产生脆性缺碳相(η相),部分fcc-Co转变为hcp-Co,导致硬质合金和金刚石薄膜的界面处易发生断裂。当温度达950℃后,表面Co含量大量上升,并且表面的硬度和弹性模量明显下降。YG6 cutting tools were heated to 750 ℃, 850 ℃, 950 ℃,1050 ℃ by vacuum atmosphere slide tube furnace, respectively, followed by annealing for 2 h, and then cooling down to room temperature. The surface of cemented tungsten carbide was characterized by SEM, EDS, XRD and nano-indentation tester. The change of Co binder phase was analyzed by Image-J software. The results show that after heating, the brittle and poor-carbon phase emerges on the surface of YG6, and some fcc-Co converts to hcp-Co, which can lead to fracture at the interface of cemented tnngsten carbide and diamond film. When the temperature is 950 ℃, Co content on the surface increases significantly, while the surface hardness and elastic modulus obviously decrease.

关 键 词：金刚石涂层 硬质合金 相变 

分 类 号：TG178[金属学及工艺—金属表面处理]