基于高温氧化特性的含硅钢氧化铁皮缺陷研究  

Formation Mechanism of Scale Defect of Silicon-Containing Steel Based on High Temperature Oxidizing Property

作　　者：王畅[1] 于洋[1] 王林[1] 惠亚军[1] 陈瑾[2] 焦会立[2] 

机构地区：[1]首钢技术研究院 [2]首钢股份公司迁安钢铁公司

出　　处：《首钢科技》2016年第2期43-48,共6页Shougang Science and Technology

摘　　要：系统研究了含硅钢氧化铁皮缺陷，采用扫描电镜及电子探针研究了氧化铁皮内元素分布情况，明确了硅的界面富集特性。采用差热分析仪对高硅钢高温氧化特性进行了分析，结果表明，温度低于1140℃为高硅钢的加速氧化区域，该温度区间处于粗轧和精轧温度区间。同时，模拟分析发现，在低于Fe2SiO4的液相温度下，界面将形成致密的Fe2SiO4颗粒层，降低了氧化铁皮的剥离性。由于生产线除鳞温度难以达到1170℃以上，所以采取了降低板坯出炉温度等措施，以减少炉生及过程氧化铁皮厚度，从而降低了含硅钢表面氧化铁皮发生比例。The mechanism of scale defect of Si-containing steel was studied. By means ol SEM and EPMA, the element distribution of scale was observed, and the enrichment of Si at the interface was illustrated. The high temperature oxidizing property of the given steel was analyzed by using differential thermal analyzer. The results showed that the thickness of scale increased rapidly when the temperature was below 1 140 ℃, which was the and compact Fe2 SiO4 granular layer, which led to the temperature range of rough and finish rolling; difficulties of descaling process, was formed at the interface under liquidus temperature of Fe2SiO4. Because it was difficult to keep the temperature of descaling process to higher than 1 170 ℃, measures such as lowering slab discharge temperature were adopted to reduce the scale thickness, and reduce scale defect of Si-containing steel accordingly.

关 键 词：氧化铁皮 氧化特性 硅富集 热轧 

分 类 号：TG146.2[一般工业技术—材料科学与工程]