CUTLERY AND/OR SERVING CUTLERY MADE OF FERRITIC STAINLESS STEEL WITH A MARTENSITIC CASE

The invention relates to cutlery and/or serving cutlery made of a steel material which is formed with a ferritic core with a substantially martensitic case. The case surface hardness of the cutlery and/or serving cutlery of the invention, determined according to the Vickers hardness test according t...

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Bibliographische Detailangaben
Hauptverfasser:	FRIZ WOLFGANG, NEUMAYER MARTIN, KIEFER ALEXANDER, STAUDINGER THEDA, BUHLMAIER GUNTER, BOERNER CORNELIUS
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 COFFEE MILLS DIFFUSION TREATMENT OF METALLIC MATERIAL DOMESTIC ARTICLES OR APPLIANCES FURNITURE GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS HOUSEHOLD OR TABLE EQUIPMENT HUMAN NECESSITIES INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SPICE MILLS SUCTION CLEANERS IN GENERAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	The invention relates to cutlery and/or serving cutlery made of a steel material which is formed with a ferritic core with a substantially martensitic case. The case surface hardness of the cutlery and/or serving cutlery of the invention, determined according to the Vickers hardness test according to Vickers HV 3, is thereby 30% to 300% greater than the lowest degree of hardness of the core, likewise measured according to Vickers HV 3. The case also has a higher elastic modulus than the core. The surface treatment occurs preferably by means of nitridization and heat treatment.