APPARATUS AND METHOD FOR PRODUCING HOT DIP METAL COATED STEEL STRIP

PROBLEM TO BE SOLVED: To provide a technique for stably producing a hot dip metal coated steel strip of high quality by suppressing generation of a coated surface defect caused by a splash. SOLUTION: Gas wiping nozzles A each having sub nozzles 2a and 2b are disposed opposite to each other via the s...

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Bibliographische Detailangaben
Hauptverfasser:	TATSUMI MASATOSHI, KUBO TAKAMI, GOTO SHINJI, NARA TADASHI, TAKEDA GENTARO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a technique for stably producing a hot dip metal coated steel strip of high quality by suppressing generation of a coated surface defect caused by a splash. SOLUTION: Gas wiping nozzles A each having sub nozzles 2a and 2b are disposed opposite to each other via the steel strip X. A gas ejection direction of a main nozzle 1 of one gas wiping nozzle A is inclined relatively to a gas ejection direction of a main nozzle 1 of the other gas wiping nozzle A so that S/b to be a ratio of an offset amount S in the longitudinal direction of the steel strip in a collision center position of a synthesized jet ejected from respective gas wiping nozzles A to a slit gap b of the main nozzle 1 is in the range of 2.5≤S/b≤6.5. COPYRIGHT: (C)2011,JPO&INPIT