摘要
采用超音速火焰喷涂技术在45钢基体上制备WC-Co涂层,利用扫描电镜、X射线衍射仪、显微硬度计等设备对所获涂层的组织结构与性能进行分析,并通过磨粒磨损试验研究了WC涂层的耐磨性能。试验结果表明:所获WC-Co涂层与基体金属结合良好,界面处未发现污染,涂层较为致密,其显微硬度在HV1 000以上;WC-Co涂层的耐磨性非常优异,经20 min磨损后,其磨损量仅为0.1 g左右: WC-Co涂层的磨损率一直呈下降趋势,与之相对比,电镀硬铬层的磨损率却呈先下降后上升的趋势,所获WC-Co涂层显示了更加稳定的耐磨性。
WC-Co coating was deposited by high-velocity oxygen-fuel(HVOF)spraying.The substructure and properties were analyzed by scanning electron microscopy(SEM),X-ray diffraction(XRD),micro-hardness tester and so on.Wear-resistance of WC coating was studied by abrasive wear test.The results showed that:no contaminant was founded at the interface of WC and substrates,so that the coat bonding properties were excellent.The WC coat was dense and above HV1 000 in micro-hardness which determined its excellent wearresistance. The mass loss of WC was only 0.1 g after 20 min test.What' s more,the mass loss rate of WC but hard chromium descended all through which proved that the wear-resistance of WC more steady.
出处
《焊接技术》
北大核心
2009年第2期12-14,共3页
Welding Technology
基金
中国民航大学校科研基金资助项目(06kys03)
