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通过对钢板表面边部裂纹进行宏观观察和微观分析,通过控制 Al、S 和 N 的含量,避免高温浇注,需用合适保护渣,控制矫直温度,保持铸机状态良好,改善铸坯的表面质量;减小横轧展宽量,提高板坯加热均匀性,保证轧制压下量,减小轧件边部不均匀变形,保持圆盘剪状态良好,可大大降低中厚板边裂的发生率,可有效的减少边部裂纹的发生。
Through the macroscopic observation and microscopic analysis of the edge cracks on the steel plate surface, by controlling the content of Al, S and N, to avoid high temperature casting, the need to use suitable mold flux to control the straightening temperature, keep the casting machine in good condition and improve the surface of the slab Quality; to reduce the amount of cross-rolling roll to improve the uniformity of slab heating, rolling reduction to ensure that the rolling edge to reduce the uneven deformation, keep the disc shears state is good, can greatly reduce the occurrence of plate edge cracking Rate, which can effectively reduce the occurrence of edge cracks.