Piston ring with hard coating and preparation method thereof

The invention belongs to the technical field of piston ring surface treatment, and discloses a piston ring with a hard coating and a preparation method of the piston ring. The outer circle face is sequentially provided with a base layer, a gradient metal nitride layer and a DLC repetitive unit layer...

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Bibliographische Detailangaben
Hauptverfasser:	LIU QIANXI, ZHOU YUETING, LI KAISHUN, SHI GUANFEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	APPARATUS THEREFOR 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 CYLINDERS DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MECHANICAL ENGINEERING METALLURGY PISTONS PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SEALINGS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	The invention belongs to the technical field of piston ring surface treatment, and discloses a piston ring with a hard coating and a preparation method of the piston ring. The outer circle face is sequentially provided with a base layer, a gradient metal nitride layer and a DLC repetitive unit layer from bottom to top. One DLC unit layer in the DLC repetitive unit layers sequentially comprises a DLC layer and a metal-doped DLC layer; and the end face chromium plating layer is a chromium plating layer on the end face of the piston ring base body. The DLC layer and the metal-doped DLC layer which are repeatedly circulated are the combination of a micron-thickness layer and a nano-thickness layer, a micro-nano layered structure is formed, the binding force between plating layers is increased, the internal stress of the plating layers is reduced, meanwhile, the stress of the plating layers can be effectively reduced through metal doping in the DLC layer, and the problem of plating layer stripping is solved. 本发明属于