VEHICLE CHASSIS MEMBER EXCELLENT IN CORROSION RESISTANCE AND METHOD OF MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a vehicle chassis member excellent in the corrosion resistance in an arc welding part and having high strength.SOLUTION: The vehicle chassis member has the arc welding joint of molten Zn-Al-Mg alloy-plated steel sheet members having a sheet thickness of 1.0-3.0 mm, w...

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Bibliographische Detailangaben
Hauptverfasser:	SHUDO TSUTOMU, URANAKA MASAAKI, HOSOMI KAZUAKI, SHIMIZU TAKESHI, IGARASHI MASAZUMI, SUDO TAKAHISA, SUDO SHUNTARO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMICAL SURFACE TREATMENT CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING 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 CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS SOLDERING OR UNSOLDERING SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a vehicle chassis member excellent in the corrosion resistance in an arc welding part and having high strength.SOLUTION: The vehicle chassis member has the arc welding joint of molten Zn-Al-Mg alloy-plated steel sheet members having a sheet thickness of 1.0-3.0 mm, wherein the steel sheet surface that has had a plated layer before welding is covered with a Zn-Al-Mg alloy layer up to a welding bead end part continuously, an Al-Mg alloy layer exists between the Zn-Al-Mg alloy layer and the steel substrate. In the steel sheet surface within 2.0 mm from the welding bead end part, the Zn-Al-Mg alloy layer has an average Al concentration of 0.2-22.0 mass% and an average Mg concentration of 1.0-10.0 mass%, and Fe-Al alloy layer has an average Fe concentration of at most 70.0 mass%.