厚规格热轧带钢高精度卷取温度控制模型

卷取温度是影响带钢组织性能的重要工艺参数.在生产实践中，如何提高厚规格带钢卷取温度的控制精度是一个难点.针对厚规格带钢在层流冷却过程中的工况特点，提出了温度场计算模型和对流换热系数模型的改进方法，并开发了一种全新的基于相似策略的自适应模型，以改善卷取温度前馈控制效果.经现场应用证明，本文提出的方案能有效提高厚规格带钢的卷取温度控制精度，其中厚度大于12 mm的带钢平均命中率可达到94.9%.

High-precision coiling temperature control model for heavy gauge strip steel

The process parameter of coiling temperature is the most critical factor to determine the final mechanical properties of strip steel. In the production practice, it is difficult to improve the coiling temperature accuracy of heavy gauge strip steel. Based on the condition characteristics of the laminar cooling process of heavy gauge strip steel, improvement methods were proposed for the tem-perature field calculating model and the heat transfer coefficient model, and a new similarity-based adaptation model was developed to improve the feed forward control effect of coiling temperature. Field applications prove that the proposed scheme can effectively im-prove the coiling temperature accuracy of heavy gauge strip steel, and the average hitting rate is about 94. 9% for the strips with a thickness more than 12 mm.