电火花沉积Fe 基涂层的组织及耐磨性能 - 表面技术.PDFVIP

摇 第42卷摇 摇 第2期摇 摇 2013 年4 月 表面技术 摇 摇 摇 Vol.42摇 No.2摇 Apr.2013 SURFACE TECHNOLOGY 摇摇摇 37 电火花沉积Fe基涂层的组织及耐磨性能 董晨竹,刑斌赛,郝杰,余龙芬,高玉新,方淳 (台州学院机械工程学院,台州318000) 摇 摇 [摘摇 要]摇 通过电火花沉积技术在P20模具钢表面制备了Fe基涂层,利用SEM,XRD及摩擦磨损试验机等 分析了涂层的组织结构、显微硬度及耐磨性能。 结果表明:电火花沉积Fe基涂层组织均匀、致密;涂层中靠近界 面处的组织为柱状枝晶,而涂层中上部组织为超细晶粒。 涂层的平均硬度为637.1HV0.1,相比基体提高了1倍; 涂层耐磨性优于基体,涂层中弥散分布的Cr C ,CrB及Fe C等硬质是Fe基涂层硬度及耐磨性提高的主要原因。 7 3 3 涂层的磨损机理主要为磨粒磨损的微切削和疲劳磨损。 [关键词]摇 电火花沉积;Fe基合金涂层;显微组织;耐磨性能 [中图分类号]TG178 摇 摇 摇 [文献标识码]A 摇 摇 摇 [文章编号]1001鄄3660(2013)02鄄0037鄄03 Microstructure and Wear Properties of Fe鄄based Coating Prepared by Electrospark Deposition DONG Chen鄄zhu,XINGBin鄄sai,HAOJie,YULong鄄fen,GAO Yu鄄xin,FANG Chun (College of Mechanical Engineering,Taizhou University,Taizhou318000,China) [Abstract]摇 The Fe鄄based alloy coating was produced on the surface of P20 steel plate by electro鄄spark deposition (ESD) technique,and the microstructure and wear properties of the coating were investigated by SEM,XRD and friction and wear test machine. Theresultsshowthatthecoatinghashomogenousanddensestructurewithfinedendriticstructureinthebot鄄 tom of the coating and ultra鄄fine grains in the middle and upper coating. The average hardness of the coating is637.1HV0.1. The wear resistance of theESDcoatingismuchhigherthanthesubstrate. Dispersionstrengtheningresultfromhardphasessuch as Cr C ,CrB,Fe C is the main factor leading to high hardness aswell aswear resistance of the coating. The wear mechanism 7 3 3 are mainly abrasive wear and fatigue wear. [Key words]摇 ESD;Fe鄄based alloy coating;microstructure;wear properties 摇 摇 塑料模具的失效主要是使用过程中的磨损、腐蚀、 钢基材表面制备了Fe基涂层,研究涂层的微观组织特 氧化和加工过程中的超差、扎刀、错位、硌伤等意外损 点及摩擦磨损性能,以拓展电火花沉积技术在塑料模 伤。 对塑料模具进