添加CeO_(2)对超音速火焰喷涂微纳米结构WC-10Co4Cr涂层组织和性能的影响  

Effect of CeO_(2) Addition on Microstructure and Properties of High Velocity Oxygen Fuel Sprayed Micro-Nano Structural WC-10Co4Cr Coating

作　　者：田英豪 丁翔[2] 杨长春 朱汉华[1] 邓义斌[1] TIAN Yinghao;DING Xiang;YANG Changchun;ZHU Hanhua;DENG Yibin(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063 [2]武汉理工大学交通与物流工程学院,武汉430063

出　　处：《机械工程材料》2023年第9期87-93,共7页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(52001239)。

摘　　要：采用超音速火焰(HVOF)喷涂技术制备了微纳米结构WC-10Co4Cr涂层和质量分数1%CeO_(2)改性微纳米结构WC-10Co4Cr涂层,研究了CeO_(2)的添加对涂层显微组织、力学性能和耐磨粒磨损性能的影响。结果表明:CeO_(2)的添加对粉末烧结过程中Co_(3)W_(3)C相的形成有抑制作用,同时能够减少喷涂过程中W_(2)C相的生成;CeO_(2)改性涂层的孔隙率为未改性涂层的72%;CeO_(2)的添加会加剧涂层的铬元素聚集程度,不利于CoCr黏结相的生成;CeO_(2)改性涂层的力学性能和耐磨粒磨损性能均低于未改性涂层,显微硬度和断裂韧度分别降低了11%和7%,经过15 600 r磨损后,其磨损质量损失率比未改性涂层高36%。The micro-nano structural WC-10Co4Cr coating and the micro-nano structural WC-10Co4Cr coating modified with 1wt% CeO_(2) were prepared by high velocity oxygen fuel(HVOF) spraying.The effect of CeO_(2) addition on the microstructure,mechanical properties and abrasive wear resistance was studied.The results show that the addition of CeO_(2) inhibited the formation of Co_3W_(3C) phase during the powder sintering process,and reduced the content of W_(2C) phase during spraying.The porosity of the CeO_(2) modified coating was 72% of that of the unmodified coating.The addition of CeO_(2) increased the degree of chromium agglomeration,which was not conducive to the formation of CoCr bonding phase.The mechanical properties and abrasive wear resistance of the CeO_(2) modified coating were lower than those of the unmodified coating,and the microhardness and fracture toughness were reduced by 11% and 7%,respectively.After wear for 15 600 r,the wear mass loss rate of the CeO_(2) modified coating was 36% higher than that of the unmodified coating.

关 键 词：WC-10Co4Cr涂层 超音速火焰喷涂 微纳米结构 CeO_(2)改性 耐磨粒磨损性能 

分 类 号：TG148[一般工业技术—材料科学与工程]