CSP工艺生产热轧板卷边裂的分析和控制  

Control and Analysis on Edge Crack of Hot Rolled Strip Coil Produced by CSP Process

作　　者：孙彦辉[1] 赵长亮[1] 孟征兵[2] 蔡开科[1] 成小军[2] 吴光亮[2] 周春泉[2] 

机构地区：[1]北京科技大学冶金与生态工程学院冶金研究中心,北京100083 [2]湖南华菱涟源钢铁有限公司,娄底417009

出　　处：《特殊钢》2006年第4期47-49,共3页Special Steel

摘　　要：经分析得出涟钢采用CSP工艺生产SS400钢板卷时,因不合理的二冷水量使70 mm薄板坯横向冷却不均匀和角部过冷,导致奥氏体中AlN析出造成晶界脆性,带钢在弯曲和矫直时产生边裂。通过控制钢中AlS含量为0．02％～0．03％及减少连铸过程吸氮和降低板坯边缘二冷水量等工艺措施,使SS400钢板卷的优等品率从92．27％提高到98．09％。It is obtained by analysis that the edge cracks occur during bending and straightening of strip due to 70 mm thin slab horizontal plane non-homogeneous cooling and edge over-cooling during production of SS400 steel strip Coil with irrational secondary cooling water rate led to precipitation of AlN in austenite and grain boundary brittle, The high quality product rate of SS400 steel strip coil increased from 92.27% to 98.09% by improved technology measure including to control Als content 0.02% - 0.03% in steel, decrease nitrogen pick-up during concasfing and secondary cooling water rata at plate slab edge.

关 键 词：薄板坯 热轧板卷 边裂 控制工艺 

分 类 号：TG335.11[金属学及工艺—金属压力加工]