Surface modified hard alloy and preparation method thereof

The invention discloses a surface modified hard alloy and a preparation method thereof, the surface modified hard alloy comprises a core part, a near surface layer and a surface layer, the core part is composed of a WC hard phase, a first cubic phase and a binding phase, the near surface layer is co...

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Bibliographische Detailangaben
Hauptverfasser:	YAN PENGFEI, ZHANG XIAOMING, WANG SHEQUAN, CHEN XIANGMING, WEN GUANGHUA
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS CASTING 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 INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY 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 WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	The invention discloses a surface modified hard alloy and a preparation method thereof, the surface modified hard alloy comprises a core part, a near surface layer and a surface layer, the core part is composed of a WC hard phase, a first cubic phase and a binding phase, the near surface layer is composed of the WC hard phase and the binding phase, the surface layer is composed of a second cubic phase, the first cubic phase is a (Ti, W) C cubic phase or a (Ti, W, X) C cubic phase, the second cubic phase is a (Ti, W) (C, N) cubic phase or a (Ti, W, X) (C, N) cubic phase, x is one or more elements of Ta, Nb and Zr, and the binding phase is a Co binding phase or a binding phase composed of Co and Cr. The preparation method comprises densification and surface modification sintering. According to the surface modified hard alloy, the bonding firmness of the surface modified hard alloy and a CVD coating can be remarkably improved, the coating is not prone to stripping in the service process, the service time of the