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以纯Fe粉和纯Al粉为熔覆材料,在ZL101基体表面采用激光熔覆工艺制备了3种不同成分的Fe-Al化合物涂层。利用光学显微镜、扫描电镜(SEM)、X射线衍射(XRD)仪和显微硬度计,对熔覆合金层以及熔覆层与铝合金基体的结合界面区的组织结构和显微硬度进行了分析。实验结果表明,激光熔覆涂层主要由FeAl与Fe_3Al相构成,涂层与基体呈锯齿状结合。3种涂层(Fe-Al,2Fe-Al和3Fe-Al)均有较高的显微硬度,分别为744 HV,603 HV和795 HV。
Pure Fe powder and pure Al powder were used as cladding materials. Three different Fe-Al compound coatings were prepared on the surface of ZL101 by laser cladding. The microstructure and microhardness of the interface between the cladding layer and the interface between the cladding layer and the aluminum alloy substrate were analyzed by optical microscope, scanning electron microscope (SEM), X-ray diffraction (XRD) and microhardness tester . The experimental results show that the laser cladding coating is mainly composed of FeAl and Fe_3Al phases, and the coating is jagged with the substrate. The three coatings (Fe-Al, 2Fe-Al and 3Fe-Al) all had higher microhardness of 744 HV, 603 HV and 795 HV, respectively.