活塞杆用纳米WC-10Co4Cr涂层的微观结构及性能  

Microstructure and Performance of Nano-WC-10Co4Cr Coating for Piston Rod

作　　者：赵坚[1,2] 陈小明 伏利[3,4] 刘伟 毛鹏展 张磊[2,4] ZHAO Jian;CHEN Xiaoming;FU Li;LIU Wei;MAO Pengzhan;ZHANG Lei(Standard&Quality Control Research Institute,Ministry of Water Resources,Hangzhou 310012,China;Key Laboratory of Surface Engineering of Equipments for Hydraulic Engineering of Zhejiang Province,Hangzhou,310012,China;Hydraulic Machinery and Remanufacturing Technology Engineering Laboratory of Zhejiang Province,Hangzhou 310012,China;Hangzhou Mechanical Research Institute,Ministry of Water Resources,Hangzhou 310012,China)

机构地区：[1]水利部产品质量标准研究所,杭州310012 [2]水利机械及其再制造技术浙江省工程实验室,杭州310012 [3]浙江省水利水电装备表面工程技术研究重点实验室,杭州310012 [4]水利部杭州机械设计研究所,杭州310012

出　　处：《腐蚀与防护》2020年第5期1-4,共4页Corrosion & Protection

基　　金：国家“948计划”项目(201218);浙江省科技计划(2017C37048);浙江省科技计划(2016C37091);杭州市科技发展计划(20162231E10);杭州市社会发展科研攻关项目(161323Z006)。

摘　　要：采用大功率超声速喷涂火焰(HVOF)技术在活塞杆表面制备了纳米WC-10Co4Cr陶瓷涂层。通过扫描电镜(SEM)、金相分析仪、结合力试验机、显微硬度计、电化学工作站等手段分析研究了纳米WC-10Co4Cr陶瓷活塞杆的表面性能。结果表明:纳米WC-10Co4Cr陶瓷涂层具有远高于活塞杆基材的硬度及耐蚀性,在500g载荷下与氮化硅球对磨180min,涂层的磨损量少于基材的1/150,并且涂层与基材之间的结合强度超过80 MPa。制备的纳米WC-10Co4Cr陶瓷涂层完全满足活塞杆的实际使用需求,并且可以大幅提高其使用寿命。Nano-WC-10Co4Cr ceramic coatings were prepared on the surface of piston rod by high-power high veloaty oxygen fuel(HVOF)thermal spraying technology.The surface properties of nano-WC-10Co4Cr ceramic piston rod were studied and analyzed by means of scanning electron microscope(SEM),metallographic analyzer,binding force tester,micro-hardness tester,and electrochemical workstation.The results showed that the nano-WC-10Co4Cr ceramic coating had much higher hardness and corrosion resistance than those of the piston rod substrate.After abrasion with silicon nitride balls at 500 g load for 180 min.the wear of the coating was less than 1/150 of the substrate・and the bonding strength between the coating and the substrate exceeded 80 MPa.The prepared nano-WC-10Co4Cr ceramic coatings completely meet the actual use requirements of the piston rod,and could greatly improve its service life.

关 键 词：纳米WC-10Co4Cr陶瓷涂层 启闭机活塞杆 超声速火焰喷涂 耐磨损 耐腐蚀 

分 类 号：TG147.442[一般工业技术—材料科学与工程]