JPS6242013B

PURPOSE:To manufacture link chains having high strength, high toughness, and high corrosion resistance by the procedure in which an iron steel link chain is subjected to a cementation treatment, then inserted directly into a fuse solution containing specific proportions of Sn and Bi, and then subjec...

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Bibliographische Detailangaben
Hauptverfasser:	TAMAMURA TATEO, ABE TAKAO, KAMITSUMA YASUO
Format:	Patent
Sprache:	eng
Schlagworte:	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 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 CHAINS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE PERFORMING OPERATIONS PUNCHING METAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To manufacture link chains having high strength, high toughness, and high corrosion resistance by the procedure in which an iron steel link chain is subjected to a cementation treatment, then inserted directly into a fuse solution containing specific proportions of Sn and Bi, and then subjected to hardening, cooling, and plating treatment concurrently. CONSTITUTION:After an iron steel link chain is subjected to a cementation or nitriding treatment, the link chain is inserted directly into a fused solution containing 30-65wt% Sn and 35-70wt% Bi and kept at 250 deg.C or less and then hardened and cooled. As a result, the hardening of the link chain so treated is sufficiently raised and also its corrosion resistance is greatly raised by its insertion into the fused solution. The preferred composition of the link chain material is an alloy of 0.1-0.5wt% C, 1wt% or less Si, 3wt% or less Mn, 0.1-1wt% Mo, and Fe.