YG6硬质合金上APA-Arc制备TiCN梯度膜结构及力学性能研究  

Microstructure and Mechanical Properties of Graded Ti CN Hard Coating Deposited by APA-Arc Technology onto YG6 Cemented Carbide

作　　者：李雪萍[1] 谭超林 蔡盼盼 陈灵[1] 雷淑梅[1] 邓阳[1] 黎毓灵 周克崧[1] 匡同春[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《硬质合金》2016年第1期1-7,共7页Cemented Carbides

基　　金：国家自然科学基金面上项目(51471071);广东省科技攻关计划项目(2013B010403008)资助

摘　　要：采用先进等离子辅助电弧(APA-Arc)技术在YG6硬质合金上制备了成分梯度的Ti CN硬质膜,借助X射线衍射仪、扫描电镜、3-D形貌仪、压痕试验法、显微硬度计等检测手段对硬质膜和基体的微观组织和力学性能进行了表征分析。结果表明,Ti CN硬质膜厚度约3μm,组织均匀致密,膜层中C和N元素的含量从膜基结合部位到膜表面呈梯度变化,心部区富氮,表层富碳;氩离子对基体表面产生了显著的刻蚀作用,硬质膜结合强度HF1级;硬质膜呈较强的(111)晶面择优取向;Ti CN硬质膜的显微硬度3 110 HV0.05,比基体硬度(1 624 HV0.05)提高1.9倍;硬质膜表面粗糙度Ra值0.19μm,比基体的表面粗糙度略有降低。Compositionally graded Ti CN hard coating was deposited on YG6 cemented carbide by advanced plasma assisted arc（APA-Arc） technology. The microstructures and main mechanical properties of the Ti CN hard coating were characterized by X-ray diffraction（XRD）, scanning electron microscope（SEM） equipped with energy dispersive spectrometer（EDS）, 3-D surface topography instrument, indentation test method and micro-Vickers hardness tester, respectively. The results show that the Ti CN hard coating with dense microstructure is about 3 μm in thickness. The C and N elements in Ti CN coating are gradiently distributed along the cross-section, with N element rich in bottom zone and C element rich in surface layer of the coating. The Ti CN hard coating with（111） preferred orientation reaches adhesion strength level of HF1 due to the assistance of ion etch-cleaning process. The hardness of the Ti CN coating is up to 3 110 HV0.05, about 1.9 times higher than that of the substrate（1 624 HV0.05）, and the roughness of the hard coating（0.19 μm） decreases a little compared with initial substrate.

关 键 词：成分梯度 APA-Arc技术 硬质合金 TiCN硬质膜 力学性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]