TC4钛合金表面CrN和DLC耐磨涂层制备及性能研究  

Preparation and Performance of CrN and DLC Coatings on TC4 Titanium Alloy

作　　者：李兆峰[1] 李志强[1] 赵朋举[1] 李士凯[1] 张建欣[1] 

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2014年第4期43-47,共5页Development and Application of Materials

基　　金：国防基础科研项目(C0820110052)

摘　　要：采用物理气相沉积技术,在TC4合金表面成功制备出CrN和DLC耐磨涂层。用扫描电镜和光学显微镜分析了耐磨涂层的表面/截面形貌和涂层厚度,VHM-I04显微硬度计测试了涂层的硬度,WS-1型划痕试验机研究了涂层的结合强度,IPC-208B原子力显微镜观察了DLC涂层的表面粗糙度,并采用TE66微磨损试验机系统考核了两种涂层的摩擦学性能。结果表明:CrN涂层厚度为5.12μm,硬度HV 1 267,结合力为22.95 N;DLC涂层由致密分布的纳米颗粒组成,厚度2.30μm,硬度HV 2 176,结合力24.85 N,表面粗糙度仅为4.86 nm;与裸TC4合金和CrN涂层相比,DLC涂层的摩擦系数较小,只有0.073,具有较好的减摩和抗磨性。CrN and DLC coatings were deposited on TC4 titanium alloy by physical vapor deposition（PVD）. Surface and section morphology,coating thickness,hardness were characterized by SEM,optical microscope,VHM-I04 microhardness tester.Bonding strength,surface roughness of DLC coating and the tribological properties were also investigated in this article. Results indicated that the thickness of CrN coating was 5. 12 μm,the microhardness was HV 1 267,the bonding force between the TC4 substrate and CrN coating was about 22. 95 N. DLC coating was composed of nanoparticles,the thickness was 2. 30 μm,the microhardness was HV 2 176,the film substrate interfacial bonding force was 24. 85 N,the surface roughness of DLC coating was 4. 86 nm. Compared with naked TC4 alloy and CrN coating,the friction coefficient of DLC coating was only 0. 073.

关 键 词：TC4钛合金 CRN涂层 DLC涂层 结合力 摩擦系数 

分 类 号：TG174[金属学及工艺—金属表面处理]