METHOD FOR CLEANING SURFACE OF STEEL SHEET

PURPOSE:To surely remove the scale with difficult peelabifity by striking the liquid drop generated in the liquid drop flow region of the liquid flow discharged from a nozzle on the surface of the steel sheet of the prescribed temperature. CONSTITUTION:The liquid is discharged from a nozzle, and the...

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Hauptverfasser:	SHIMIZU MASUHITO, SHIRAISHI MASASHI, KANEMOTO NORIO, AOYAMA NAOTOSHI, KUWAKO HIROSHI, OGAWA HIROYUKI, ADACHI AKIO
Format:	Patent
Sprache:	eng
Schlagworte:	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 MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To surely remove the scale with difficult peelabifity by striking the liquid drop generated in the liquid drop flow region of the liquid flow discharged from a nozzle on the surface of the steel sheet of the prescribed temperature. CONSTITUTION:The liquid is discharged from a nozzle, and the liquid drop generated in the liquid drop flow region is struck on the surface of the steel sheet of >=850 deg.C. The scale of the structure which may bite in the metal can be removed to clean the surface of the steel sheet. In the case of the steel sheet containing Si of >=0.5wt%, the surface temperature is >=850 deg.C, and the liquid is discharged from the nozzle to satisfy the relationship between the discharge pressure P and the discharge amount W of P(kg/cm )XW(litre/ cm )>=0.8X(wt.% Si). This constitution prevents the generation of the scale flaw on the hot rolled steel sheet.