ANALYSIS OF HEAT TRANSFER IN STEEL BILLETS DURING TRANSPORT

K. Cançado, L. N. Soares
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Abstract

During the seamless steel tubes manufacturing process, the temperature decrease between the exit of the furnace and the rolling mill entrance is determinant factor in the rolling process and the quality of the tube. This study aims to model the cooling of the billets during transport in order to evaluate the minimum temperature required for the billet leaves the furnace and also the maximum transport time without compromising the rolling process, allowing a better setup of equipment and reducing the production costs. The cooling profile was determined numerically through energy balances performed on the billet and the results obtained were compared with real values of temperature measurements by thermocouples installed on the billet. Measurements with thermocouples were conducted in billets of 270, 230 and 180 mm diameter. The error relative to the real values for all cases was below than 2.5% and the model is considered validated to use.
钢坯在运输过程中的传热分析
在无缝钢管生产过程中,炉膛出口到轧机入口之间的温度下降是影响钢管轧制过程和质量的决定性因素。本研究旨在模拟钢坯在运输过程中的冷却,以评估钢坯离开熔炉所需的最低温度,以及在不影响轧制过程的情况下的最大运输时间,从而更好地设置设备并降低生产成本。通过在钢坯上进行能量平衡来确定冷却剖面,并将所得结果与安装在钢坯上的热电偶的实际温度测量值进行了比较。热电偶测量是在直径为270,230和180mm的钢坯中进行的。所有情况下相对于实际值的误差都小于2.5%,认为该模型可以使用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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