Abstract The non-uniform friction and lubrication are key factors that affect the slab quality during continuous casting. In order to present the complicated friction behavior of slab in the mold, a friction calculation model was built based on a full-scale heat transfer model. An inverse algorithm was applied to calculate the real heat flux by measuring temperatures from thermocouples buried in various locations of the mold. ANSYS software was used to solve the finite-element equations. The results showed that the friction state of the slab surface progressed from a liquid friction zone to a mixed friction zone, and then to a solid friction zone from the meniscus. In the casting direction, the liquid frictional stress gradually increased, which was between 0 and 1 kPa; the mixed frictional stress rapidly increased from 1 to 15 kPa; the solid frictional stress increased linearly, reaching 28.4 kPa at the exit. The slag solidification temperature, slag crystallization temperature and superheat could affect the states of liquid, solid or mixed friction.

中文翻译：

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基于逆算法的连铸坯非均匀摩擦行为研究

摘要 不均匀的摩擦和润滑是影响连铸坯质量的关键因素。为了呈现铸坯在结晶器中复杂的摩擦行为，建立了基于全尺寸传热模型的摩擦计算模型。通过测量埋在模具不同位置的热电偶的温度，应用逆算法来计算实际热通量。ANSYS 软件用于求解有限元方程。结果表明，板坯表面的摩擦状态由液体摩擦区发展到混合摩擦区，再从弯液面发展到固体摩擦区。在浇铸方向，液体摩擦应力逐渐增大，在0～1 kPa之间；混合摩擦应力从1 kPa迅速增加到15 kPa；固体摩擦应力线性增加，出口处达到 28.4 kPa。炉渣凝固温度、炉渣结晶温度和过热度会影响液体、固体或混合摩擦的状态。