采用静态增重法测定2520不锈钢在高温条件下的氧化动力学,运用X射线衍射测定氧化物类型,运用扫描电镜(SEM)观察不同氧化时间形成的氧化膜的形貌,通过能谱分析(EDS)氧化膜的成分,研究2520不锈钢的高温氧化行为.实验结果表明,氧化物类型主要为Fe2O3,且氧化物类型随温度的升高而变化.在氧化初期,氧化物中富Fe,氧化速度较快,氧化反应发生在氧化膜的外表层,即发生外氧化. The oxidation kinetics of 2520 stainless steel under high temperature was measured by static weight increasing method. The oxide type was determined by X-ray diffraction. The morphology of oxide film formed by different oxidation time was observed by scanning electron microscope (SEM) ) Oxide film, the oxidation behavior of 2520 stainless steel was studied.The experimental results show that the type of oxide is mainly Fe2O3, and the type of oxide changes with the increase of temperature.At the initial oxidation stage, the oxide is rich in Fe and oxidizes faster , The oxidation reaction occurs in the outer surface of the oxide film, that is, external oxidation occurs.