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.
出处
《特殊钢》
北大核心
2006年第4期47-49,共3页
Special Steel
关键词
薄板坯
热轧板卷
边裂
控制工艺
Thin Slab, Hot Rolling Strip Coil, Edge Crack, Controlling Technology
