METHOD FOR CONTROLLING COOLING UNIT FOR STRIP CONTINUOUSLY HEAT TREATING DEVICE

PURPOSE:To uniformly and continuously cool a strip to a suitable temp. without uneven temp. by injecting the specific mixing ratio of gas and cooling water to the strip to be the specific temp. in a cooling furnace provided on the rear step of a heating furnace. CONSTITUTION:The steel strip 2 contin...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KOMORI KATSUTOSHI, KAWAMURA HIROHISA, SATO HIDEAKI, KAWABATA AKIRA, UEMATSU NOBUO, TOSHIMITSU TORU
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 uniformly and continuously cool a strip to a suitable temp. without uneven temp. by injecting the specific mixing ratio of gas and cooling water to the strip to be the specific temp. in a cooling furnace provided on the rear step of a heating furnace. CONSTITUTION:The steel strip 2 continuously passing through a continuously heat treating device is cooled in the cooling furnace 8 after heating it in the heating furnace (not shown in figure) to execute the heat treatment. In the cooling furnace 8, the mixed medium of gas and cooling water is injected from plural cooling unit 20 set along an advancing direction to the steel strip 2 through injecting nozzles in a header 23. Then, the mixing ratio of gas and cooling water injected from the injecting nozzles is made to be