管线钢边部黑线成因分析及改善

Cause analysis and improvement of black line at steel edge of pipeline

管线钢生产投用大倒角结晶器,铸坯内弧凹陷,经轧制变形,边部金属延伸不均产生折叠,形成边部黑线。本文通过将大倒角结晶器足辊改用平辊,有效的减轻边部黑线的产生,改善了钢卷的边部质量。

The large chamfer crystallizer is used in the production of pipeline steel.The inner arc of the casting blank is sunken After rolling deformation,the edge metal extends unevenly and folds to form black lines on the edge.In this paper,by changing the foot roll of the large chamfer crystallizer to a flat roll,the generation of black line at the edge is effectively reduced,and the edge quality of steel coil is improved.