现场实践发现涟钢一炼钢厂铸坯角部纵裂产生于结晶器,其主要原因是铜管磨损超标，足辊未对中，结晶器振动不平稳，结晶器冷却水速达不到要求．坯壳与结晶器壁间气隙不均匀，使相邻面坯壳厚度不一，在角部产生应力集中，使角部开裂。采取相应措施后，纵裂废品量与废品率大幅度下降． Field practice found that a steel plant in Lianyuan Iron and Steel plant slab corner crack occurred in the mold, the main reason is excessive wear copper tube, foot roller is not in the mold oscillation is not smooth, mold cooling water speed not up to requirements. The gap between the blank shell and the mold wall is not uniform, so that the thickness of the adjacent blank shell is different, resulting in stress concentration at the corner and cracking of the corner. After taking the corresponding measures, the amount of waste products and rejection rate of drastic decline.