【摘要】：采用X射線衍射儀(XRD)、掃描電鏡(SEM)、顯微硬度計、摩擦磨損試驗機、沖蝕試驗機等手段研究高溫及氧化對超音速噴涂WC-10Co4Cr涂層的顯微組織、顯微硬度、結合強度、耐磨性能、耐沖蝕性能等的影響。結果表明:在空氣中經(jīng)600℃熱處理后,涂層發(fā)生了明顯的高溫氧化,涂層中WC、Co、Cr相的含量降低,轉化為Co WO_4、Cr_2O_5、C_6WO_6等氧化物相,孔隙率明顯升高,結合強度有所降低,雖然涂層的顯微硬度值有所提高,但耐磨損及耐沖蝕性能都明顯降低;通過Ar保護,涂層只受到600℃的高溫作用,涂層的相組成未發(fā)生明顯改變,顯微硬度有較大幅度的提高,且分布更加均勻,耐干摩擦磨損及耐泥沙沖蝕性能均獲得大幅提高。
[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，

本文編號：2329368