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对渗铝后的8407钢试样进行常温硬质阳极氧化处理,使其表面形成氧化膜。通过金相显微镜观察氧化膜横截面组织,并探讨了氧化膜的形成机制;采用扫描电镜观察氧化膜表面形貌,并检测氧化膜沿厚度方向的化学成分及其分布;利用X射线衍射仪对氧化膜相组成进行分析。结果表明,渗铝8407钢经过常温硬质阳极氧化后,试样表面分为3层,从基体向外侧依次为基体、渗层、氧化膜。氧化膜连续致密,厚度均匀,与基体结合紧密,其主要成分为O、Al和Fe,且各元素分布均匀,主要相组成为Fe3O4和Al2O3。
The aluminized 8407 steel samples were hard anodized at room temperature to form an oxide film on the surface. The microstructure of the oxide film was observed by optical microscopy and the formation mechanism of the oxide film was discussed. The surface morphology of the oxide film was observed by scanning electron microscope (SEM) and the chemical composition and distribution along the thickness of the oxide film were measured. By means of X-ray diffraction Oxide film phase composition analysis. The results show that the surface of the aluminized 8407 steel is divided into three layers after hard anodic oxidation at room temperature, and the matrix, the diffusion layer and the oxide film are arranged in order from the substrate to the outside. The oxide film is continuous and dense, with uniform thickness and close bond with the matrix. The main components of the oxide film are O, Al and Fe, and the elements are evenly distributed. The main phases are Fe3O4 and Al2O3.