TWO-STAGE GAS NITRIDING PROCESS FOR IMPROVED WEAR AND EROSION RESISTANCE

A method of strengthening a surface of a metallic member comprising nitriding the metallic member, machining the metallic member to a smoothness value of less than 1.0 micron, nitriding the metallic member a second time, and polishing the metallic member to a smoothness value of approximately 0.8 mi...

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Bibliographische Detailangaben
Hauptverfasser:	BARTHOLOMEW, Darin, THETE, Manoj M, EDWARDS, Romaine O, SCHOENEGGE, Kurt W
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 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 MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS POWDER METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A method of strengthening a surface of a metallic member comprising nitriding the metallic member, machining the metallic member to a smoothness value of less than 1.0 micron, nitriding the metallic member a second time, and polishing the metallic member to a smoothness value of approximately 0.8 micron or less. Procédé de renforcement d'une surface d'un élément métallique, comprenant la nitruration de l'élément métallique, l'usinage de l'élément métallique pour atteindre une valeur de poli inférieure à 1,0 micron, une seconde nitruration de l'élément métallique et le polissage de l'élément métallique pour atteindre une valeur de poli d'environ 0,8 micron ou moins.