METHOD OF MANUFACTURING CVT RING MEMBER, THE CVT RING MEMBER, AND CVT BELT

PROBLEM TO BE SOLVED: To provide a CVT ring member capable of improving fatigue strength without using mal aged steel and without expensive shot peening.SOLUTION: A ring member as a material formed in a ring from a thin structural steel plate is subjected to decarbonization, circumference adjustment...

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Hauptverfasser:	ITO YUKIO, NISHIDA KOJI, SHIMIZU TAKUYA, KOZUKA TAKUMI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVINGPURPOSES BLASTING CHAINS 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 ENGINEERING ELEMENTS AND UNITS FERROUS OR NON-FERROUS ALLOYS FITTINGS PREDOMINANTLY USED THEREFOR GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THERMAL INSULATION IN GENERAL TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a CVT ring member capable of improving fatigue strength without using mal aged steel and without expensive shot peening.SOLUTION: A ring member as a material formed in a ring from a thin structural steel plate is subjected to decarbonization, circumference adjustment and nitriding. Chemical components of the ring member as the material include, by mass, 0.3-0.5% of C, 0.5% or less of Si, 0.8% or less of Mn, 4.0% or less of Ni, 1.0-4.0% of Cr, 0.5-1.5% of Mo and 0.1-1.0% of V, while the remaining comprises Fe with inevitable impurities. The decarbonization can be done in a depth extending inward from a ring surface at the approximate center in a ring widthwise direction of the ring member after nitriding within a range of dc/dr of 0.03 to 0.23 where dc refers to a carbonization depth of a depth containing C of a C content of the ring member as the material minus 0.02%, and dr refers to a thickness of the ring member after the nitriding.