摘要
分别采用空气助燃高速热喷涂技术(HVAF)和氧气助燃高速热喷涂技术(HVOF)制备了WC-10Co4Cr涂层。通过X射线衍射仪(XRD)和扫描电子显微镜(SEM)表征和分析了不同的粉末和涂层的物相组成、微观组织结构,并对不同涂层的显微硬度、孔隙率、抗冲蚀性能进行了对比,探讨了涂层在泥沙中的冲蚀机理。结果表明:采用HVAF方法制备的涂层致密度好,其在显微硬度和抗冲蚀性能方面要优于HVOF方法制备的涂层;WC颗粒细化增强了涂层的显微硬度和韧性,提高了涂层的抗微切削和抗疲劳剥落性能,有利于提高涂层的抗冲蚀性能。
WC-10Co4Cr coatings were prepared by high velocity air fuel(HVAF)thermal spraying and high velocity oxygen fuel(HVOF)thermal spraying,respectively.The phase composition and microstructure of different powders and coatings were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The microhardness,porosity and erosion resistance were compared between different coatings.Erosion failure mechanism of the coatings in sandy stream was analyzed as well.The results indicate that the coating prepared by HVAF with good density was superior to the coating prepared by HVOF in micro-hardness and erosion resistance.The refined WC grains could improve the micro-hardness and toughness of the coatings,resulting in the increase of micro-cutting resistance and anti-fatigue spalling properties,and thus enhance the erosion resistance for the coatings.
作者
伏利
周夏凉
陈小明
吴燕明
王莉容
赵坚
刘伟
FU Li;ZHOU Xialiang;CHEN Xiaoming;WU Yanming;WANG Lirong;ZHAO Jian;LIU Wei(Standard&Quality Control Research Institute,Ministry of Water Resources,Hangzhou 310012,China;Key Laboratory of Research on Hydraulic and Hydro-Power Equipment Surface Engineering Technology of Zhejiang Province,Hangzhou 310012,China;Water Machinery and Remanufacturing Technology Engineering Laboratory of Zhejiang Province,Hangzhou 310012,China;Hangzhou Mechanical Design Research Institute,Ministry of Water Resources,Hangzhou 310012,China)
出处
《腐蚀与防护》
CAS
北大核心
2019年第4期240-244,292,共6页
Corrosion & Protection
基金
浙江省科技计划项目(2017C37048
2016C37091)
杭州市科技发展计划项目(20162231E10)
