The paper analyses the stability of rib slab on method of energy, the formula of longitudinal critical force is deduced, and rational arrangement of stiffening rib is discussed.
利用能量法分析了加肋平板的稳定问题，推导了纵向临界力的计算公式，并探讨加劲肋的合理布置。
The causes of surface longitudinal cracking were analyzed. Countermeasures were put forward based on the production practices of thin slab casting and rolling at Tonghua Steel Co.
分析了连铸薄板坯表面纵向裂纹的产生原因，结合通钢薄板坯生产实际情况，提出了改进措施。
The results show that the surface longitudinal crack of hot-roll Q345B medium plate is caused by inclusion and surface longitudinal crack of slab.
结果表明，热轧Q 345 B中厚板表面纵裂纹是由于铸坯中存在夹杂物及铸坯纵裂引起的。
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