LOW-FRICTION COATING FILM AND SLIDE MEMBER

• Main Authors: NAKATANI TATSUYUKI, HARA SHINTARO, OKAMOTO KEIJI
• Format: Patent
• Language: English; Japanese
• Published: 19.02.2015
• Subjects: BEARINGS; 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; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a low-friction coating film usable even at a high temperature at which molybdenum disulfide cannot be used.SOLUTION: A coating film 10 is formed by using a PVD method. The coating film 10 includes a metal nitride layer 11 formed on the surface of a base metal, a titanium carbonitride layer 12 laminated thereon, and a titanium carbide layer 13 laminated thereon and exposed to the surface. The hardness of the titanium carbide layer 13 is 15 GPa or less. 【課題】二硫化モリブデンが使用できない高温でも使用できる低摩擦なコーティング膜を提供する。【解決手段】ＰＶＤ法を用いて形成されるコーティング膜１０である。コーティング膜１０は、母材の表面に形成される金属窒化層１１と、その上に積層される炭窒化チタン層１２と、その上に積層され、表面に露出する炭化チタン層１３とを含む。炭化チタン層１３の硬度が、１５ＧＰａ以下である。【選択図】図１