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利用电子分析天平、场发射扫描电镜、XRD衍射仪研究了不同Ce含量对00Cr17铁素体不锈钢高温抗氧化性的影响。结果表明:00Cr17钢中加入Ce后,钢的抗氧化性能得到提高,在1000℃以上时效果更加显著。氧化温度在700~1000℃范围内,随着Ce添加量的增加,氧化速率常数kp减小,氧化激活能提高,氧化膜由Cr2O3单相组成,而氧化温度在1100℃时,实验钢的氧化膜由Cr2O3和Fe2O3两相组成,Ce减缓了Fe2O3相的形成速率。Ce改善00Cr17铁素体不锈钢抗氧性的主要原因是降低了氧化物的生长速率,提高了氧化膜的致密性,增强了氧化膜与基体的粘附性。
The effects of different Ce contents on the high temperature oxidation resistance of 00Cr17 ferritic stainless steel were studied by using electronic analytical balance, field emission scanning electron microscope and XRD diffraction. The results show that the oxidation resistance of steel increases after adding Ce into 00Cr17 steel, and the effect is more significant when the temperature is above 1000 ℃. The oxidation temperature is in the range of 700-1000 ℃. With the increase of Ce content, the oxidation rate constant kp decreases and the oxidation activation energy increases. The oxide film consists of Cr2O3 single phase. When the oxidation temperature is 1100 ℃, the oxidation of experimental steel The film consists of two phases of Cr2O3 and Fe2O3, and Ce slows down the formation rate of Fe2O3 phase. The main reason for Ce to improve the oxygen resistance of 00Cr17 ferritic stainless steel is to reduce the growth rate of the oxide, improve the compactness of the oxide film and enhance the adhesion of the oxide film to the substrate.