20CrNiMo表面针状空心阴极辉光放电制备TiN研究  

Study on the TiN Modified Layer on the Surface of 20CrNiMo Steel by Needle-shape Cathode Glow Discharging

作　　者：陈飞[1] 赫单[1] 陈家庆[1] 周海[1] 

机构地区：[1]北京石油化工学院工程教育中心,北京102617

出　　处：《中国表面工程》2011年第1期49-51,55,共4页China Surface Engineering

基　　金：国家自然基金项目(50874018)

摘　　要：在真空炉内以针状钛丝为溅射源极,以氩气和氮气为放电气体,利用辉光放电现象、尖端放电和空心阴极效应在20CrNiMo表面复合渗镀合成TiN改性层,目的是提高20CrNiMo表面的耐磨性能。利用扫描电子显微镜(SEM)观察了改性层的截面形貌;测量了改性层的显微硬度并用XRD观察分析了改性层的相结构;采用MFT–4000型高速往复磨损试验机对渗镀改性层的摩擦磨损性能进行了研究。结果表明:在试验工艺条件下20CrNiMo试样表面制备的TiN改性层厚度约为40μm。改性后表面摩擦因数为0.169,较20CrNiMo基体的摩擦因数0.324明显减小,耐磨性能提高。The multiple structures made of alloying and coating layers of TiN was achieved on the surface of 20CrNiMo steel by the needle-shape cathode glow discharging.It is aimed to reduce the friction coefficient of the 20CrNiMo and to improve the property of the wear-resistance.The morphology of TiN modified layer at the cross section was observed by Scanning Electron Microscope（SEM）.The friction and wear behavior of the TiN/ZrN films under dry sliding against GCr15 steel was evaluated on a MFT-4000 high speed to-and-fro wear test rig.The results showed that it was feasible to prepare TiN layer of 40 μm thickness by the needle-shape cathode glow discharging.It has been found that the TiN modified layer has excellent friction and wear-resistant behaviors.The friction coefficient of the 20CrNiMo substrate was about 0.324 under dry sliding,while the TiN modified layer experienced much abated friction coefficient to 0.169 under the same testing condition.

关 键 词：TiN改性层 辉光放电 针状空心阴极 耐磨性 

分 类 号：TG174.445[金属学及工艺—金属表面处理]