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研究了热轧退火态的430铁素体不锈钢在700~900℃的高温氧化行为,测量了其恒温氧化增重曲线,利用扫描电镜(SEM)和能谱仪(EDS)观察分析了氧化表面形貌和组成,使用X射线衍射仪(XRD)鉴定了氧化物的种类。结果表明:在700℃生成的Cr2O3氧化膜不足以覆盖基体,材料氧化缓慢;800℃时氧化速率相对较大,生成的氧化物主要为Cr Mn1.5O4和Fe2O3;900℃时氧化十分迅速,材料表面有大量Fe2O3突起;退火温度对材料高温氧化性能影响不大。
The oxidation behavior of hot-rolled 430 ferritic stainless steel at 700-900 ℃ was investigated. The oxidation-induced weight gain curve of the ferritic stainless steel 430 was measured. The surface morphology of the oxidized surface was analyzed by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) Appearance and composition, the use of X-ray diffraction (XRD) identified the type of oxide. The results show that the Cr2O3 oxide film formed at 700 ℃ is not enough to cover the substrate, and the material is slowly oxidized. The oxidation rate is relatively high at 800 ℃, and the oxides are Cr Mn1.5O4 and Fe2O3. The oxidation rate is very high at 900 ℃. A large number of Fe2O3 protrusions on the surface; annealing temperature has little effect on the high temperature oxidation performance of the material.