HVOF/AIP技术制备耐磨蚀涂层及性能研究  

Preparation and Properties of Wear and Corrosion Resistant Coatings by a Hybrid HVOF/AIP Technique

作　　者：于大千 王乘风 纪任山 石亮 刘增斌 李富强 李海庆 王启民[3] YU Daqian;WANG Chengfeng;JI Renshan;SHI Liang;LIU Zengbin;LI Fuqiang;LI Haiqing;WANG Qimin(Beijing Tiandi Rongchuang Technology Co.Ltd.,Beijing 100013,China;National Energy Technology&Equipment Laboratory of Coal Utilization and Emission Control,Beijing 100013,China;School of Mechanical and Electrical Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]北京天地融创科技股份有限公司,北京100013 [2]国家能源煤炭高效利用与节能减排技术装备重点试验室,北京100013 [3]广东工业大学机电工程学院,广州510006

出　　处：《表面技术》2025年第1期42-52,共11页Surface Technology

基　　金：国家自然科学基金(52375173);天地科技股份有限公司科技创新创业资金专项项目(2024-TD-MS015);广东省基础与应用基础研究基金项目(2023B151520033)。

摘　　要：目的采用超音速火焰喷涂(HVOF)技术和电弧离子镀(AIP)技术制备耐磨蚀防护涂层,延长45^(#)钢结构件在煤粉供料系统的服役周期。方法通过HVOF、AIP和HVOF/AIP复合技术分别在45^(#)钢表面制备了WC-10Co4Cr涂层、CrN涂层和WC-10Co4Cr/CrN复合涂层,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、激光共聚焦显微镜等仪器,分析了不同涂层的微观形貌、物相组成、耐蚀性和耐磨性。结果WC-10Co4Cr、CrN和WC-10Co4Cr/CrN 3种涂层与基体之间界面结合状态良好。HVOF技术制备的WC-10Co4Cr涂层的耐腐蚀性稍弱,AIP技术沉积的CrN涂层有良好的耐腐蚀性能,复合技术沉积的WC-10Co4Cr/CrN涂层中,CrN涂层较好地覆盖了WC-10Co4Cr涂层的孔隙,大幅提升了WC-10Co4Cr涂层的耐腐蚀性。划痕测试结果表明,WC-10Co4Cr/CrN复合涂层的结合力优于单一的CrN涂层,硬度和摩擦磨损测试表明WC-10Co4Cr/CrN复合涂层的硬度、韧性和耐磨性均远优于单一的CrN涂层。结论HVOF制备的WC-10Co4Cr涂层具有良好的承载能力,在此涂层表面通过AIP法制备的WC-10Co4Cr/CrN复合涂层,可以提升45^(#)钢基体的耐磨、耐腐蚀性能,从而有效延长工件的使用寿命。The issues of wear and corrosion deterioration have been persisting as problems in the feeding system of industrial pulverized-coal boilers during operation.In this study,WC-10Co4Cr,CrN,and hybrid WC-10Co4Cr/CrN coatings were prepared on 45^(#)steel surfaces by high-velocity oxy-fuel(HVOF)spraying,arc ion plating(AIP),and a hybrid HVOF/AIP technique,respectively,to extend the service life of the 45^(#)steel components within the pulverized-coal system.The phase structure and microstructure,surface and cross-sectional morphologies,and wear track morphologies were observed with X-ray diffraction(XRD),scanning electron microscopy(SEM),and energy dispersive spectrometer(EDS).The corrosion resistance of the coatings was characterized through electrochemical tests.The mechanical properties of the coatings were analyzed through nano-indentation test,Vickers indentation test,and high-load scratch test.The tribological properties of the coatings were analyzed by a pin-on-disk wear tester,both in atmospheric and pulverized-coal environments.The results indicated that the main phase in the HVOF WC-10Co4Cr coating was the WC phase.Some minor W_(2)C,Co,and Co_(6)W_(6)C phases were also detected.In the AIP CrN and hybrid WC-10Co4Cr/CrN coatings,XRD peaks of FCC CrN phases prevailed.However,the preferred orientations on these two specimens were very different.The CrN coating deposited on 45^(#)steel exhibited a strong(111)preferred orientation,whereas no obvious preferred orientation was observed in the CrN coating deposited on the WC-10Co4Cr coating.The WC-10Co4Cr coating had a thickness of approximately 230μm with some internal pores,while the CrN coating was about 35μm thick and relatively denser.The interface bonding between the WC-10Co4Cr,CrN,and WC-10Co4Cr/CrN coatings and the substrate was very adherent.Both EIS and potentiodynamic polarization curve tests indicated that corrosion resistance of the CrN and WC-10Co4Cr/CrN coatings were superior by an order of magnitude to that of the WC-10Co4Cr coating,suggesting that t

关 键 词：超音速火焰喷涂 电弧离子镀 耐腐蚀性 耐磨性 

分 类 号：TG174.442[金属学及工艺—金属表面处理]