| 摘要 |
PROBLEM TO BE SOLVED: To provide a winding temperature control method of a hot rolled steel sheet which can accurately control a winding temperature of the hot rolled steel sheet by properly correcting a heat transfer coefficient model part at a water cold heat transfer coefficient of the hot rolled steel sheet.SOLUTION: When controlling a hot rolled steel sheet which is rolled by hot rolling equipment to a prescribed winding temperature by cooling the hot rolled steel sheet by cooling water on a runout table, there is used, as a model formula of a heat transfer coefficient, a formula which is obtained by multiplying a heat transfer coefficient learning value to a heat transfer coefficient model part which is expressed as a function of a water temperature of the cooling water, a temperature of the hot rolled steel sheet, and the density of a water amount of the cooling water, and by adding a correction item which enlarges the heat transfer coefficient accompanied by an increase of a transfer speed when the transfer speed of the hot rolled steel sheet is not lower than a specified threshold. |
