Effect of Continuous Casting Mold Oscillation Parameters on Slab Surface Cracks Formation Under High Casting Speed
Effect of Continuous Casting Mold Oscillation Parameters on Slab Surface Cracks Formation Under High Casting Speed
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DOI：
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发表时间：
2009
影响因子：
2.1
通讯作者：
Zhu Miaoyong
中科院分区：
文献类型：
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作者：
Zhu Miaoyong
结晶器振动引起的初凝壳的应力和变形是产生结晶器表面裂纹的主要原因。通过计算2.0m/min拉速下弯月面最大液体摩擦力和最大动态流道压力，分析了结晶器振动参数对板坯表面纵横向裂纹形成的影响，并结合振动参数对结晶器润滑条件和振动状态的影响，提出了控制振动参数减少表面裂纹的原则。结果表明，振动频率和振幅越大，表面裂纹形成的可能性越大。非正弦振动因子降低了撕裂壳体的可能性，改善了润滑条件，但加深了振动痕迹，增强了振动冲击；适当降低振动频率，适当增大振幅和非正弦振动因子，可以抑制表面裂纹的形成。
The stress and distortion of initial solidifying shell due to mold oscillation is the main reason of generating strand surface cracks.The effect of mold oscillation parameters on longitudinal and transverse slab surface cracks formation under high casting speed was analyzed through calculating the maximum liquid friction force and maximum dynamic flux channel pressure in meniscus with 2.0 m/min casting speed,and the principle of controlling oscillation parameters for reducing surface cracks was proposed in combination with the influence of oscillation parameters on the lubrication condition and oscillation state of mold.The results show that the possibility of surface cracks formation increases with oscillation frequency and amplitude,and the influence of oscillation frequency is stronger than that of amplitude.The possibility of tearing shell is depressed and the lubrication condition is improved with non-sinusoidal oscillation factor,but the oscillation marks is deepened and the oscillation impact is enhanced.The surface cracks formation can be restrained by decreasing oscillation frequency and increasing amplitude and non-sinusoidal oscillation factor properly.