HVAF喷涂WC-10Co4Cr涂层及其性能
Properties of WC-10Co4Cr Coatings Sprayed by HVAF
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。
氧气助燃高速热喷涂(HVOF)
WC-10Co4Cr涂层
冲蚀
high velocity air fuel (HVAF) thermal spraying
high velocity oxygen (HVOF) thermal spraying
WC-10Co4Cr coating
erosion
Abstract
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 micro-hardness,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.
中图分类号 TG174.442 DOI 10.11973/fsyfh-201904002
所属栏目 试验研究
基金项目 浙江省科技计划项目（2017C37048；2016C37091）；杭州市科技发展计划项目（20162231E10）
收稿日期 2017/9/20
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联系人作者伏利(fulitop@163.com)
引用该论文: FU Li,ZHOU Xialiang,CHEN Xiaoming,WU Yanming,WANG Lirong,ZHAO Jian,LIU Wei. Properties of WC-10Co4Cr Coatings Sprayed by HVAF[J]. Corrosion & Protection, 2019, 40(4): 240
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【9】马宁,程振雄,乌焕涛,等. 粉末结构对HVOF喷涂WC-Co涂层组织性能的影响[J]. 稀有金属材料与工程,2015,44(12):3219-3223.
【10】BARBER J,MELLOR B G,WOOD R J K. The development of sub-surface damage during high energy solid particle crosion of a thermally sprayed WC-Co-Cr coating[J]. Wear,2005,259:125-134.
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【13】王群,屈帮荣,唐瞾肸,等. 超音速火焰喷涂碳化钨-钴涂层磨粒磨损行为[J]. 中国有色金属学报,2015,25(7):1920-1927.
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