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采用超音速火焰喷涂法在H13钢表面制备了FeCrBSi涂层,通过场发射扫描电子显微镜(FESEM)、能谱仪(EDS)、X射线衍射仪(XRD)、分析了其表面的截面形貌、化学元素组成和物相。利用球/平面接触方式进行了涂层高温磨损试验,采用FESEM及其EDS分析了磨痕形貌和化学元素的变化,讨论了高温对涂层摩擦因数(COF)和磨损性能的影响。结果表明,FeCrBSi涂层表面涂覆性均匀,涂层厚度约为100μm,涂层截面无明显的层状结构;涂层磨痕处Fe,Cr,B和Si元素分布较均匀,没有发生富集现象;涂层在高温磨损后主要物相为α(Fe,Cr)固溶体,由摩擦产生FeSi相改善了涂层抗高温磨损性能;在200,300,400和500℃时涂层的摩擦因数平均值分别为0.29,0.70,0.63,0.54,氧化膜分布不均匀和磨损形式是摩擦因数发生变化的主要因素;在200℃时涂层主要发生氧化磨损,而在300,400和500℃时主要发生氧化磨损并伴有轻微的磨粒磨损,其中Cr和Si的化合物是涂层耐磨的主要因素。
FeCrBSi coatings were prepared on the surface of H13 steel by supersonic flame spraying. The surface morphology of the FeCrBSi coatings was analyzed by field emission scanning electron microscopy (FESEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) Chemical element composition and phase. The high temperature wear test of the coating was carried out by ball / plane contact method. The morphology and chemical elements of the wear scar were analyzed by FESEM and EDS. The effects of high temperature on the friction coefficient (COF) and wear resistance of the coating were also discussed. The results show that the surface coating of FeCrBSi coating is uniform, and the coating thickness is about 100μm. There is no obvious lamellar structure in the coating. Fe, Cr, B and Si elements are uniformly distributed on the wear scar, Phenomenon; the main phase of the coating after high temperature wear is α (Fe, Cr) solid solution, the FeSi phase produced by friction improves the high temperature wear resistance of the coating; the average friction coefficient of the coating at 200,300,400 and 500 ℃ are 0.29 , 0.70,0.63,0.54, the uneven distribution of oxide film and the wear form are the main factors of the change of friction coefficient. At 200 ℃, the coatings mainly oxidize and wear, but mainly oxidize at 300, 400 and 500 ℃ with slight Of abrasive wear, Cr and Si compounds which is the main factor in wear-resistant coating.