平整生产线带钢挫伤缺陷的原因分析  

Analysis of Scratches in the Skin Pass Line

作　　者：吕长宝[1] 

机构地区：[1]河北钢铁股份有限公司唐山分公司技术中心,河北唐山063016

出　　处：《轧钢》2013年第6期56-60,共5页Steel Rolling

摘　　要：分析了带钢平整时出现挫伤缺陷的形貌和分布规律及其原因,挫伤缺陷是由相互挤压的带钢的相对滑动导致局部金属产生剪切滑移而形成的,带卷板面的不平滑区域与相邻平滑区域存在明显的半径突变,滑动时在与相邻层的接触面区产生足够的压力,导致局部金属产生剪切滑移。避免挫伤缺陷的主要方法是抑制开卷时带卷的层间滑动。The morphology and distribution low of scratch defect of strip during temper rolling were analyzed. Scratch defect is caused by the shear slip of local metal resulting from the relative sliding of adjacent layers with high pressure. The reason of relative sliding is that the static friction between adjacent layers is not e- nough to counteract the rotary inertia of coil. The radius mutation existing between the rugged area and the ad- jacent smooth area cause sufficient pressure on the local contact surface when existing relative sliding ,and re- sult the shear slip of local metal. The scratch defect avoid method is suppress interlayer slip when uncoiling.

关 键 词：挫伤缺陷 分布规律 板形 卷取 

分 类 号：TG335.5[金属学及工艺—金属压力加工]