CONTINUOUS GALVANIZING TREATMENT EQUIPMENT AND CONTINUOUS GALVANIZING TREATMENT METHOD

• Main Author: KOGA SHIGENOBU
• Format: Patent
• Language: English
• Published: 05.03.2003
• Edition: 7
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS; 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; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; 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; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a line and a method for continuous heat-treating a high- class galvanized strip subjected to hot rolling into high quality and at low cost. SOLUTION: The continuous galvanizing treatment equipment includes a pickling part for removing the scale of a hot-rolled strip, a rolling mill for reducing the sheet thickness of the strip from which the scale is removed, a furnace part for annealing the strip discharged from the rolling mill, and whose sheet thickness is reduced, and a plating part for subjecting the annealed strip to galvanizing. In this treatment equipment and the above method, the change of the sheet thickness along the longitudinal direction of the strip before annealing of the hot rolled sheet is minimized, and the annealing conditions of the hot rolled steel sheet are uniformized, thereby obtaining high productivity and high quality.