膜厚对(Ti,Al)N涂层微结构、机械性能及切削特性的影响  

Effect of thickness of(Ti,Al)N coating on its microstructure,mechanical properties and cutting characteristics

作　　者：苏永要[1,2] 胡荣[1] 王锦标[1,2] 冯桐 鲜济遥 

机构地区：[1]重庆文理学院新材料技术研究院,重庆402160 [2]重庆市高校微纳米材料工程与技术重点实验室,重庆402160

出　　处：《电镀与涂饰》2016年第18期990-994,共5页Electroplating & Finishing

基　　金：国家自然科学基金(51275323);重庆市教委科学技术研究项目(KJ1601104;KJ1401119);重庆文理学院科研项目(R2012CJ13;Y2015XC24);大学生创新创业训练项目(201510642294)

摘　　要：利用蒸发与磁控溅射二元组合源设备,通过控制沉积时间在钨钴类硬质合金螺纹刀表面制备了不同膜厚的(Ti,Al)N涂层。采用X射线衍射仪、扫描电镜、能谱仪、维氏显微硬度计、洛氏硬度计和摩擦试验机考察了涂层厚度对涂层微观结构、表面形貌、元素组成、显微硬度、膜-基结合力及摩擦磨损性能的影响,并通过切削40Cr钢材研究了涂层刀具的切削特性。结果表明,沉积6 h所得涂层(膜厚约5.0μm)的复合硬度(涂层+基材的显微硬度)显著高于沉积2 h(膜厚约1.8μm)所得涂层,但膜-基结合力更弱,磨耗速率更快。（Ti,AI）N coatings with different thicknesses were deposited on cobalt-tungsten carbide chaser by magnetron sputtering and evaporating deposition combination sources equipment through controlling deposition time. The dependence of microstructure, surface morphology, elemental composition, microhardness, adhesion to substrate and friction-wear performance of the coating on its thickness were studied by X-ray diffractometer, scanning electron microscope, energy- dispersive spectroscope, Vickers microhardness tester, Rockwell hardness tester and friction tester. The cutting characteristics of coated cutting tools were analyzed by cutting 40Cr steel column. The results showed that the coating deposited for 6 hours, whose thickness is ca.5.0 μm, has a significantly higher composite hardness （i.e. microhardness of coating plus substrate） than that deposited for 2 h, whose thickness is ca. 1.8 μm, but a lower adhesion strength and faster wear rate.

关 键 词：氮化钛铝 涂层 钨钴类硬质合金 刀具 厚度 磁控溅射 真空镀 摩擦学 

分 类 号：TG174.442[金属学及工艺—金属表面处理]