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在现场取样进行红锈氧化铁皮的宏观形貌、微区化学成分、组织结构及O/Fe质量百分含量的测试分析,发现钢中的Si与Fe生成的2FeO.SiO2化合物是形成红锈的主要原因。红锈氧化铁皮中的O/Fe质量百分比由内表面向外表面逐渐增加,内表面结构比较疏松,外表面结构比较致密。通过采用降低钢种硅含量,降低轧制过程温度和改善层流冷却工艺等措施有效地控制了氧化铁皮的性质和结构,从而避免了红锈氧化铁皮的产生。
The sample was taken on site for the analysis of macroscopic morphology, chemical composition, microstructure and O / Fe mass percentage of red rust scale. It was found that the 2FeO.SiO2 compounds formed by Si and Fe in steel were red rust main reason. Red rust scale in the O / Fe mass percentage from the inner surface to the outer surface gradually increased, the inner surface structure is loose, the outer surface structure is relatively dense. The properties and structure of the scale are effectively controlled through the measures such as reducing the silicon content of the steel, reducing the temperature of the rolling process and improving the laminar cooling process, so as to avoid the generation of red rust scale.