MANUFACTURE OF GALVANNEALED STEEL SHEET

PURPOSE:To execute alloying by heating, by previously subjecting the surface of a steel sheet to Fe-C-N composite coating treatment and thereafter applying galvanizing thereto. CONSTITUTION:The surface of a steel sheet contg. 0.02 to 0.5% P and/or 0.03 to 3% Si and/or 0.1 to 3% Mn is applied with Fe...

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Bibliographische Detailangaben
Hauptverfasser:	ITOMI MAKOTO, SUZUKI SHINICHI
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:	PURPOSE:To execute alloying by heating, by previously subjecting the surface of a steel sheet to Fe-C-N composite coating treatment and thereafter applying galvanizing thereto. CONSTITUTION:The surface of a steel sheet contg. 0.02 to 0.5% P and/or 0.03 to 3% Si and/or 0.1 to 3% Mn is applied with Fe-C-N composite plating, and thereafter, alloying is executed by heating. Thus, its plating wettability is improved, the alloying rates of various steel sheets with different alloying rates are equalized, the industrial manufacture is facilitated and quick and uniform alloying treatment is enabled particularly to the kinds of steel having slow alloying reaction rate such as P-added steel.