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首页> 外文期刊>ISIJ international >Measurement and Prediction of Lubrication, Powder Consumption, and Oscillation Mark Profiles in Ultra-low Carbon Steel Slabs
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Measurement and Prediction of Lubrication, Powder Consumption, and Oscillation Mark Profiles in Ultra-low Carbon Steel Slabs

机译：超低碳钢坯润滑，粉末消耗和振动痕迹轮廓的测量和预测

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摘要

The flow of melted mold powder into the interfacial gap between the strand and the mold wall is important for productivity and quality in continuous cast slabs. Some of the mold slag (flux) consumption provides true lubrication, while much of the rest is trapped in the oscillation marks on the slab surface. This work presents measurements of powder consumption from extensive careful plant trials on ultra-low carbon steels, and a new, simple, semi-empirical model to predict slag consumption. The model predicts "lubrication consumption" by deducting the slag carried in the oscillation marks from the measured total. The oscillation mark shape is estimated from a theoretical analysis of equilibrium meniscus shape, which is based on metallographic analysis of many hook and oscillation mark shapes. The model demonstrates that the fraction consumed in the oscillation marks decreases with increasing casting speed, because the oscillation mark depth depends more on casting speed than on mold oscillation conditions. The model is validated by successful prediction of known trends of oscillation mark depth and mold powder consumption with changing various operation parameters. The model provides new insight into mold lubrication phenomena, which is important for extending casting operation to higher speeds and new lubrication regimes.
机译：熔融的保护渣粉末流入铸坯和铸型壁之间的界面间隙对于连续铸造铸坯的生产率和质量至关重要。某些铸渣（助焊剂）的消耗提供了真正的润滑，而其余的大部分被困在板坯表面的振荡痕迹中。这项工作提供了对超低碳钢进行的大量仔细的工厂试验所得出的粉末消耗量的测量结果，以及一个新的，简单的半经验模型来预测炉渣消耗量。该模型通过从测得的总量中减去振动痕迹中携带的炉渣来预测“润滑消耗”。振荡痕迹的形状是根据平衡弯月面形状的理论分析估计的，该分析基于许多钩形和振荡痕迹形状的金相分析。该模型表明，随着铸造速度的增加，振动痕迹中消耗的分数会降低，因为振动痕迹深度更取决于铸造速度，而不是取决于模具振动条件。通过成功预测振荡标记深度和脱模粉消耗量随各种操作参数变化的已知趋势来验证该模型。该模型提供了对模具润滑现象的新见解，这对于将铸造操作扩展到更高的速度和新的润滑方式非常重要。

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