COOLING METHOD FOR STRIP BY COOLING ROLL IN CONTINUOUS ANNEALING INSTALLATION

PURPOSE:To cool a strip efficiently at adequate temp. reducing rates and to supress the generation of shape defects in a continuous annealing stage by selecting the diameter of cooling rolls in an adequate range in accordance with the thicknesses of the strip and line speeds. CONSTITUTION:In a conti...

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Bibliographische Detailangaben
Hauptverfasser:	JITSUKAWA MASAHARU, NAKAYAMA TEIJI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
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Beschreibung
Zusammenfassung:	PURPOSE:To cool a strip efficiently at adequate temp. reducing rates and to supress the generation of shape defects in a continuous annealing stage by selecting the diameter of cooling rolls in an adequate range in accordance with the thicknesses of the strip and line speeds. CONSTITUTION:In a continuous annealing installation, a strip is cooled by the cooling rolls in which refrigerants are passed. Here, the diameter D(m) of the cooling rolls is selected within the range satisfying the relation of the formulas where the thickness of the strip is defined as d(mm.), the line speed as v(m/sec) and the overall coefft. of heat transfer of the cooling rolls as U0(kcal/m .h. deg.C). If such cooling rolls are used, the strip is cooled effectively without generating shape defects.