PRODUCTION OF HIGHLY CORROSION RESISTANT SUSPENSION SPRING

PURPOSE:To produce a highly corrosion resistant suspension spring where the occurrence of pitting corrosion in prevented the contact part between spring materials has been prevented and which has excellent corrosion resistance of coating. CONSTITUTION:In the suspension spring manufacturing method by...

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Hauptverfasser:	MITSUYOSHI YASUHIKO, KOYAHARA HIDEO
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR ARTIFICIAL STONE BLASTING CEMENTS CERAMICS CHEMICAL SURFACE TREATMENT CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE 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 GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING LIME, MAGNESIA 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 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 PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS REFRACTORIES SHOCK-ABSORBERS SLAG SPRINGS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THERMAL INSULATION IN GENERAL TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To produce a highly corrosion resistant suspension spring where the occurrence of pitting corrosion in prevented the contact part between spring materials has been prevented and which has excellent corrosion resistance of coating. CONSTITUTION:In the suspension spring manufacturing method by passing through a series of stages consisting of soaking treatment, cold forming, tempering, stress peening, chemical conversion treatment, coating, baking, etc., the surface of at least a part of a spring steel material before cold forming is brush-plated with zinc and a series of spring manufacturing stages is done. A series of spring manufacturing stages can be used without alteration, and corrosion resistance in the contact part between suspension spring materials in a salt damage environment can be improved and a marked effect of preventing the occurrence of the origin of breakage can be produced. By using brush plating, the necessity of the conventional immersion electrolytic bath can be obviated, and further, in the case where the part to be brush-plated is limited within a particularly small part, the effect of cost reduction, with respect to equipment and stages, is extremely great.