脉冲放电工艺参数对TiC涂层形成的影响  

Effect of Technological Parameters for Liquid-Phase Pulse Discharge of Ti Electrode on the Formation and Properties of TiC Coating on Plain Carbon Steel Substrate

作　　者：揭晓华[1] 靖爱[1] 卢国辉[1] 刘易凡[1] 谢光荣[1] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510640

出　　处：《材料保护》2006年第4期39-41,47,共4页Materials Protection

基　　金：广东省自然科学基金资助项目(030032)

摘　　要：采用液相脉冲放电技术对机械切削加工工具材料表面进行改性,具有很大的经济效益。将高熔点金属Ti电极置入含碳的液相介质中,利用脉冲放电所产生的低温高能等离子体在45钢基体上沉积TiC陶瓷涂层。讨论了脉冲放电工艺参数对涂层形成与涂层硬度的影响。结果表明:脉冲宽度和峰值电流是影响涂层沉积的主要因素,脉冲间隔和放电沉积时间对涂层厚度有影响,而对涂层的硬度几乎没有影响;在小峰值电流(8A)和窄脉宽(12μs)的条件下,可以获得高硬度的TiC涂层。With a view to the prominent economic significance in the surface modification of cutting tools using liquid-phase pulse discharge, TiC ceramic coating was prepared on the surface of 45 steel, making use of the low-temperature high-energy plasma produced between Ti electrode and 45 steel immersed in liquid kerosene in the presence of continual pulse discharge. The effect of the pulse discharging parameters on the formation and hardness of the TiC coating was investigated. Results showed that the peak current and pulse on-time had primary effects on the coating formation, while the pulse off-time and depositing time had almost no effect on the hardness but thickness of the TiC coating. It was feasible to obtain TiC coating with high hardness at a relatively small peak current and short pulse duration.

关 键 词：钛电极 脉冲放电 TIC涂层 工艺参数 

分 类 号：TG174.44[金属学及工艺—金属表面处理]