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通过高温氧化试验(1200℃,保温5 min,氧化气氛A和B)模拟了2507双相不锈钢热轧初期的氧化过程,并应用扫描电子显微镜(SEM)、辉光放电光谱仪(GDS)、X射线衍射仪(XRD)和X射线光电子能谱仪(XPS)等手段,分析了不同气氛下氧化膜的组成和结构以及初期氧化特性。结果表明:氧化膜主要由Fe3O4、Cr2O3和尖晶石型(FeCr2O4、MnCr2O4等)等复合氧化物组成;气氛中氧含量的变化可改变氧化膜中氧化物结构、组成,铁素体优先于奥氏体氧化。
The oxidation process of 2507 duplex stainless steel at the initial stage of hot rolling was simulated by high temperature oxidation test (1200 ℃ for 5 min, oxidation atmosphere A and B). The oxidation process of the hot rolled 2507 duplex stainless steel was simulated by scanning electron microscopy (SEM), glow discharge spectrometer (GDS) (XRD) and X-ray photoelectron spectroscopy (XPS) were used to analyze the composition and structure of the oxide film and the initial oxidation characteristics under different atmospheres. The results show that the oxide film is mainly composed of composite oxides such as Fe3O4, Cr2O3 and spinel (FeCr2O4, MnCr2O4, etc.); the change of oxygen content in the atmosphere can change the oxide structure and composition in the oxide film, Oxidation of the body.