Method for predicting a specific heat of a steel sheet in a cooling process

A method for controlling cooling of a steel sheet characterized by controlling the end-of-cooling temperature in a cooling process from the Ae 3 or above temperature of the steel sheet, during which; preliminarily obtaining enthalpies (H³ and H±) of an austenite phase and ferrite phase respectively...

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Bibliographische Detailangaben
Hauptverfasser:	Hishinuma, Noriyuki, Miyata, Hidenori, Taniguchi, Hirokazu, Okamoto, Riki
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A method for controlling cooling of a steel sheet characterized by controlling the end-of-cooling temperature in a cooling process from the Ae 3 or above temperature of the steel sheet, during which; preliminarily obtaining enthalpies (H³ and H±) of an austenite phase and ferrite phase respectively at some temperatures, obtaining a dynamic enthalpy (Hsys) defined by formula (1) with an untransformed fraction (X³) of austenite in accordance with a target temperature pattern, predicting the temperature by using a gradient of this dynamic enthalpy with respect to temperature as a dynamic specific heat and controlling the cooling of the steel sheet: Hsys = H³ X³ + H± ¢ 1 - X³