热轧带钢氧化铁皮的微观形貌和氧化动力学研究

 模拟了热轧带钢在不同温度、保温不同时间时，氧化铁皮的生成情况，并利用扫描电子显微镜(SEM)和X射线衍射对氧化铁皮的显微结构和形貌进行了分析研究。研究结果表明：热轧带钢在不同温度、保温不同时间，氧化铁皮都出现分层现象，临铁层为疏松的FeO，中间层为Fe3O4，外层为Fe2O3，中间层和外层致密；在同一温度下随着保温时间的增加，氧化铁皮厚度呈增加趋势；氧化铁皮形成的网状裂纹是氧化动力学曲线由抛物线规律向直线规律转变的主要原因。该模拟方法解决了精轧过程中无法直接测量氧化铁皮厚度的问题，为通过调整生产工艺参数控制氧化铁皮厚度提供了参考。

Study on the Morphology and Oxidation Kinetics of Oxide Scale of Hot Rolling Strip Steel

The formation of oxide scale of the hot rolled strip wassimulated at different temperature by holding different time, and then, the microstructure and morphology of the oxide scale were investigated by means of scanning electron microscopy (SEM) and X-ray diffraction. The results show that the oxide scale on the surface of the steel has three layers, composed of wustite, magnetite and hematite, magnetite and hematite are compact. With the increase of the holding time at the same temperature, the thickness of the oxide scale increases. The mesh crack of the oxide scale is the main reason for the oxidation kinetic curves turn from parabolic law to linear law. The problem that the thickness of the oxide scale cannot be directly measured is solved by this simulation method, and it can provide a reference for oxide scale thickness control by adjusting the process parameters.