METHOD FOR CALCULATING WATER COOLING HEAT TRANSFER COEFFICIENT OF STEEL PLATE, METHOD FOR COOLING STEEL PLATE, AND METHOD FOR MANUFACTURING STEEL PLATE

To provide a method for calculating the water cooling heat transfer coefficient of a steel plate, a method for cooling a steel plate, and a method for manufacturing a steel plate that can improve the accuracy of cooling a steel plate by increasing the accuracy in calculation of a learning value of the water cooling heat transfer coefficient.SOLUTION: There is provided a method for calculating the water cooling heat transfer coefficient of a steel plate when cooling a steel plate S rolled by a rolling machine 20 with a cooling device 40 while conveying the steel plate, and the method includes, with a parameter including at least one physical quantity related directly or indirectly to the distribution of temperature, the degree of reduction in temperature, or the degree of heat recuperation of the steel plate after cooling as an input variable, and with a related value of the water cooling heat transfer coefficient of the steel plate as an output variable, inputting a parameter of a steel plate to be rolled to a prediction model generated from the past operation data of the cooling device including the past physical quantity to predict the related value for the steel plate to be rolled, and determining the water cooling heat transfer coefficient from the predicted related value.SELECTED DRAWING: Figure 1 【課題】水冷熱伝達係数の学習値の算出精度を高めることにより、鋼板の冷却精度を向上させることができる鋼板の水冷熱伝達係数の算出方法、鋼板の冷却方法および鋼板の製造方法を提供する。【解決手段】圧延機２０によって圧延された鋼板Ｓを搬送しながら冷却装置４０によって冷却する際の鋼板の水冷熱伝達係数の算出方法であって、冷却後における鋼板の温度分布、温度低下度合いまたは復熱度合いに、直接的もしくは間接的に関連する少なくとも一つの物理量を含むパラメータを入力変数とし、鋼板の水冷熱伝達係数の関連値を出力変数として、過去の物理量を含む冷却装置の過去の操業データから生成された予測モデルに対して、圧延対象の鋼板のパラメータを入力することによって、圧延対象の鋼板について関連値を予測し、予測された関連値から水冷熱伝達係数を決定する。【選択図】図１