For shape of CC beam blank is complex, there are more rate of longitudinal crack on the surface.
连铸异型坯由于其形状复杂，表面纵裂纹发生率较高。
Based on the underground of high efficient CC in Ma 'steel, the longitudinal surface crack and centerline crack, the uppermost defects of beam blank CC production are studied.
针对马钢异型坯高效连铸的背景，分析了异型坯生产中铸坯质量的主要缺陷类型：表面纵裂和中心裂纹。
The crack sensitivity of hypo-peritectic steel, its formation mechanism and factors are discussed, and on the analysis, the reasons and factors on longitudinal surface crack are found out.
本文从亚包晶钢的裂纹敏感性，表面纵裂形成及影响因素等方面进行讨论，初步阐述了亚包晶钢圆坯表面纵裂形成原因及各种因素对表面纵裂的影响。
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