高温及氧化对WC-10Co4Cr涂层微观结构及性能的影响
发布时间：2018-11-13 14:06
【摘要】：采用X射线衍射仪(XRD)、扫描电镜(SEM)、显微硬度计、摩擦磨损试验机、冲蚀试验机等手段研究高温及氧化对超音速喷涂WC-10Co4Cr涂层的显微组织、显微硬度、结合强度、耐磨性能、耐冲蚀性能等的影响。结果表明:在空气中经600℃热处理后,涂层发生了明显的高温氧化,涂层中WC、Co、Cr相的含量降低,转化为Co WO_4、Cr_2O_5、C_6WO_6等氧化物相,孔隙率明显升高,结合强度有所降低,虽然涂层的显微硬度值有所提高,但耐磨损及耐冲蚀性能都明显降低;通过Ar保护,涂层只受到600℃的高温作用,涂层的相组成未发生明显改变,显微硬度有较大幅度的提高,且分布更加均匀,耐干摩擦磨损及耐泥沙冲蚀性能均获得大幅提高。
[Abstract]:The microstructure, microhardness and bonding strength of high temperature and oxidation sprayed WC-10Co4Cr coatings were studied by means of X-ray diffractometer (XRD), scanning electron microscope (SEM), microhardness tester, friction and wear tester, erosion tester and so on. Wear resistance, erosion resistance and so on. The results show that after heat treatment at 600 鈩，
本文编号：2329368
[Abstract]:The microstructure, microhardness and bonding strength of high temperature and oxidation sprayed WC-10Co4Cr coatings were studied by means of X-ray diffractometer (XRD), scanning electron microscope (SEM), microhardness tester, friction and wear tester, erosion tester and so on. Wear resistance, erosion resistance and so on. The results show that after heat treatment at 600 鈩，
本文编号：2329368
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