METHOD FOR CONTINUOUS ETCHING OF LOW-CARBON HOT-ROLLED STRIP STEEL

FIELD: continuous treatment of metal surface, in particular etching of low-carbon steel band in deep bath. ^ SUBSTANCE: claimed method includes band passing through bath of etching aggregate, divided onto four sections with hydrochloric acid solutions, wherein acid concentration is subsequently incr...

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Bibliographische Detailangaben
Hauptverfasser:	SENICHEV G.S, TOROKHTIJ V.P, BAZANOV P.S, BUDANOV A.P, ADAMOVICH N.A, ZLOV V.E
Format:	Patent
Sprache:	eng ; rus
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 METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE
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Beschreibung
Zusammenfassung:	FIELD: continuous treatment of metal surface, in particular etching of low-carbon steel band in deep bath. ^ SUBSTANCE: claimed method includes band passing through bath of etching aggregate, divided onto four sections with hydrochloric acid solutions, wherein acid concentration is subsequently increased, and iron concentration is subsequently decreased. Low-carbon steel containing 0.05-0.11 vol.% of carbon is etched at temperature subsequently elevated from first to forth section according to equation: t = 5*(n+10)0C, wherein n is a section number. ^ EFFECT: etching aggregate of improved capability due to increased stimulation etching process; steel without underetching defects. ^ 1 ex