MANUFACTURE OF HIGH CORROSIVE RESISTANT SUSPENDING SPRING

PURPOSE:To provide a manufacturing method for high corrosive resist suspending spring having good coating corrosive resistance without delayed fracture. CONSTITUTION:In the manufacturing method for suspending spring by executing one series of the processes of soaking treatment, hot forming, quenchin...

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Bibliographische Detailangaben
Hauptverfasser:	MITSUYOSHI YASUHIKO, KOYAHARA HIDEO
Format:	Patent
Sprache:	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 DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ENGINEERING ELEMENTS AND UNITS 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 MEANS FOR DAMPING VIBRATION MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS SHOCK-ABSORBERS SPRINGS 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:	PURPOSE:To provide a manufacturing method for high corrosive resist suspending spring having good coating corrosive resistance without delayed fracture. CONSTITUTION:In the manufacturing method for suspending spring by executing one series of the processes of soaking treatment, hot forming, quenching, tempering, stress peening, chemical conversion treatment, coating, etc., or soaking treatment, cold forming, tempering, stress peening, chemical conversion treatment, coating, etc., nickel is electrolytically coated at least on a part of the surface of a steel material for spring, beforehand to manufacture the suspending spring after executing the one series of the process. Since hydrogen in the steel material is released and also nickel is diffusion-infiltrated at the time of executing the soaking treatment, the corrosive resistance at the contact part between the suspending spring materials in salt damage environment is improved, and the development of the fracture starting point is prevented and the effect for preventing the delayed fracture is large. Further, one series of the manufacturing process for spring can be used as it is, and the advantage of the equipment cost is large.