Flat Steel Product Having a Zn-Galvannealed Protective Coating, and Method for the Production Thereof

A flat steel product having a steel substrate and a protective coating having zinc as its main constituent that has been applied to the steel substrate by hot dip coating and produced by a subsequent galvannealing treatment, wherein the protective coating has pores on its free surface that extend in...

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Bibliographische Detailangaben
Hauptverfasser:	Machalitza, Karsten, Reckzeh, Michael, Macherey, Friedhelm, Uran, Klaus, Yanik, Robert
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS 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 FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MEASURING METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PHYSICS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TESTING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A flat steel product having a steel substrate and a protective coating having zinc as its main constituent that has been applied to the steel substrate by hot dip coating and produced by a subsequent galvannealing treatment, wherein the protective coating has pores on its free surface that extend into the protective coating. In the flat steel product, the proportions of right-skewed measurement traces determined in a topographic study are predominant over the proportion of non-right-skewed measurement traces both in the measurement direction and transverse to the measurement direction. Right-skewed measurement traces are determined by comparing the mean ascertained for each measurement trace with the median ascertained therefor. Those measurement traces where the mean is greater than the median are classified as being right-skewed.