Dichtungselement, insbesondere für Absperr- und Regelorgane und Verfahren zu seiner Herstellung

• Main Authors: KLEINHANS, WERNER., 59425 UNNA, DE, BECHTE, VEIT., 59439 HOLZWICKEDE, DE
• Format: Patent
• Language: German
• Published: 23.05.1996
• Edition: 6
• Subjects: ACTUATING-FLOATS; 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; COCKS; DEVICES FOR VENTING OR AERATING; DIFFUSION TREATMENT OF METALLIC MATERIAL; 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; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

A packing element, in particular for shutting-off and regulating means, consists of a plate-like, piston-like or ball-like shutting-off body made of a metallic or non-metallic material, for example an Al2O3 ceramic material. A hard layer is deposited for example by a plasma CVD process on a working surface of the shutting-off body. The hard layer has an adhesive layer portion and a sliding layer portion. The working surface of the shutting-off body is physically etched in advance by an argon sputtering process. When switching from the etching process to the adhesive layer portion application process, and also subsequently to the sliding layer portion application process, the process parameters are regulated to achieve determined gradients between the various process steps. This substantially improves the adhesiveness of the hard layer to the working surface of the shutting-off body.