Nitrided steel member and process for producing same

A nitrided steel member produced by forming an iron nitride compound layer on the surface of a steel member having a prescribed composition, wherein: when the surface of the nitrided steel member is measured by X-ray diffraction, the intensity ratio IFe4N(111)/{IFe4N(111) + IFe3N(111)} is 0.5 or mor...

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Bibliographische Detailangaben
Hauptverfasser:	KOBAYASHI ATSUSHI, GYOTOKU YUYA, IMATAKA HIDEKI, YUYA MASATO, MAEDA SUSUMU, SHIMIZU YUICHIRO, KANAYAMA MASAO, AKIMOTO KIYOTAKA
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BLASTING 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 ENGINEERING ELEMENTS AND UNITS FERROUS OR NON-FERROUS ALLOYS GEARING GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THERMAL INSULATION IN GENERAL TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	A nitrided steel member produced by forming an iron nitride compound layer on the surface of a steel member having a prescribed composition, wherein: when the surface of the nitrided steel member is measured by X-ray diffraction, the intensity ratio IFe4N(111)/{IFe4N(111) + IFe3N(111)} is 0.5 or more, IFe4N(111) referring to the X-ray diffraction peak intensity assignable to the (111) plane of Fe4N, and IFe3N(111) referring to the X-ray diffraction peak intensity assignable to the (111) plane of Fe3N; the Vickers hardness of the iron nitride compound layer is 900 or less; the Vickers hardness of the base metal at a point located immediately under the iron nitride compound layer is 700 or more; the difference between the Vickers hardness of the iron nitride compound layer and that of the base metal at the point is 150 or less; and the thickness of the iron nitride compound layer is 2 to 17mum.