摘要
利用光学显微镜、扫描电镜及能谱对U75V热轧钢轨表面氧化铁皮的表面形貌、截面形貌、氧化铁皮厚度、组织成分进行了观察和测量,并讨论了钢轨和板带表面氧化铁皮厚度及形貌差异的原因。研究表明,U75V热轧钢轨表面氧化铁皮具有典型的由内到外分别为FeO、Fe3O4和Fe2O3氧化物的三层结构,在内层FeO与基体界面处存在Si元素的富集;钢轨表面氧化铁皮平均厚度达50μm以上,下表面氧化铁皮厚度大于上表面;钢轨和板带表面氧化铁皮厚度及形貌的差异主要与二者断面形状和生产工艺的差异有关。
The surface morphology,section morphology,thickness and microstructure of oxide scale on the surface of U75 V hot rolled rail were observed by optical microscope,scanning electron microscope and energy spectrum.The causes for the difference of thickness and morphology of oxide scale on rail and strip surface were analyzed.The study shows that the scale has a typical three layer structure of FeO,Fe3O4 and Fe2O3 oxides from inside to outside,the concentration of Si elements exists at the interface between the inner layer and the matrix.The average thickness of oxide scale of rail is over 50 μm,the thickness of underside is bigger than upside.The difference of thickness and morphology of oxide scale on rail and strip surface is mainly related to the section shape and the production process.
出处
《钢铁钒钛》
CAS
北大核心
2018年第3期165-168,共4页
Iron Steel Vanadium Titanium
关键词
钢轨
氧化铁皮
厚度
显微结构
rail
oxide scale
thickness
microstructure
