近几年，随着品种钢生产比例的加大，富含Nb、V、Als元素的钢种出现了大量的钢板边部纵裂纹。总结济钢在这方面的认识和解决过程，认为控制钢板边部纵裂纹最重要的技术措施是：铸坯冷送、强化铸机设备管理、加强N的过程控制、提高钢水纯净度、合适的二冷制度。
Recent years, with the increasing of production ratio for high grade steel, too much tiny crack appears at the margin of the steel plate surface with high alloy content such as Nb, V and Al elements. The author have summarized the related experience and think the most important measures are slab cold delivers, strengthen the caster machine management, enhance the nitrogen control level, improve the steel pureness and take the appropriate second cooling curve.
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