SPHC热轧带钢边部“黑线”研究  

Study on "Black Line" on the Edge of SPHC Hot-rolled Strip

作　　者：陈连生[1] 谷辉格[1] 宋进英[1] 田亚强[1] 张大伟[1] 魏英立[1] 沈永革[1] 

机构地区：[1]河北联合大学河北省现代冶金技术重点实验室,河北唐山063009

出　　处：《钢铁钒钛》2013年第2期103-108,共6页Iron Steel Vanadium Titanium

基　　金：河北省自然基金(E2009000791)资助项目

摘　　要：为了消除酸洗后显现在SPHC热轧带钢边部处的黑线缺陷,利用金相显微镜、扫描电镜、能谱仪等相关试验手段,研究分析了带钢边部黑线产生的原因。结果表明:带钢边部黑线缺陷处成分主要为Fe元素,组织为铁素体和少量珠光体,存在粗晶、混晶现象。黑线产生的主要原因是带钢边部存在裂纹,轧制过程中由于拉应力使边角部金属翻平到带钢表面形成黑线。通过改善带钢边角部质量和优化立辊辊型及轧制工艺,可有效消除黑线缺陷,保证良好产品质量,提高成材率,从而满足市场的需求。In order to eliminate the black line defect occurring on the edge of SPHC hot-rolled strip after pickling, the reasons for producing black line were investigated by means of microscope, scanning electron microscopy, energy dispersive spectroscopy and other related test equipment. The results show that the main element in defect area is Fe, and the microstructures are dominated by ferrite and a small amount of pearlite, accompanied by coarse crystal and mixed crystal. It is found that the black line is formed from edge cracks which are tumed over and brought to the strip surface due to tensile stress. By improving the strip＇ s edge and comer quality and optimizing vertical roll type and rolling process, the black line can be effectively eliminated, which ensures good product quality and yield, thus satisfying the need of market.

关 键 词：热轧带钢 黑线 混晶 微裂纹 翻平 立辊 

分 类 号：TG335.11[金属学及工艺—金属压力加工]