W18Cr4V表面TiN/TiCN硬质涂层的制备与表征  

Deposited Preparation and Characteristic of Hard TiN/TiCN Coating on W18Cr4V Substrate

作　　者：王晓奇[1] 曹慧[2] 雷彪[1] Wang Xiaoqi;Cao Hui;Lei Biao(Department of Electromechanical,Inner Mongolia Technical College of Mechanics and Electrics,Hohhot 010070,China;Department of Metallurgy,Inner Mongolia Technical College of Mechanics and Electrics,Hohhot 010070,China)

机构地区：[1]内蒙古机电职业技术学院机电系,呼和浩特010070 [2]内蒙古机电职业技术学院冶金系,呼和浩特010070

出　　处：《机械科学与技术》2018年第11期1762-1767,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：内蒙古教育厅自然科学项目(NJZC17471)资助

摘　　要：采用优化的工艺参数在W18Cr4V高速钢上制备了纳米硬质TiN/TiCN涂层,以此提高刀具材料的使用寿命。采用磁控溅射方法,以N2和C2H2为反应气体,在W18Cr4V高速钢基体上制备高质量的涂层。通过XRD、XRF、SEM研究了涂层的化学成分和结构,借助显微硬度计和销盘式摩擦磨损试验机分别测试了涂层的硬度和摩擦磨损性能,采用切削试验研究涂层的使用寿命和高温热稳定性。结果表明:涂层表面元素分布相对均匀,涂层为FCC结构的TiCxN1-x和TiN,平均晶粒尺寸分别为35.65 nm和32.12 nm;涂层硬度较大,高于3 300 HV;涂层的耐磨、切削性能和热稳定性较好,摩擦系数和磨损量较低,涂层刀具的使用寿命是无涂层刀具的3倍左右。The work aims to improve the service life of cutting tools by depositing nano-hard TiN/TiCN coatings on W18Cr4V substrate.With N 2 and C 2H 2 as reaction gas,the high quality coatings were prepared on W18Cr4V substrate by taking advantage of reactive magnetron sputtering using optimal parameters.XRF,XRD,SEM were employed to investigate the structure,chemical composition and surface morphology of coatings.The micro-hardness and frictional wear properties were studied by using micro-hardness tester and pin disc friction and wear testing machine,respectively.The service life and thermal stability of the coatings were studied by cutting test.The results show that the coatings mainly composed of TiC xN 1-x and TiN and the elements distribute relatively uniform,which the average grain sizes of coating were 35.65 nm and 32.12 nm.The hardness of the coatings isabove 3 300 HV.The abrasion resistance,cutting performance and thermal stability of the coating are high,the friction coefficient and wear loss are low,and the service life of the coated cutter is about 3 times that of the non-coated cutter.

关 键 词：纳米复合涂层 微观结构 磁控溅射 机床 涂层厚度 

分 类 号：TG174[金属学及工艺—金属表面处理]