ZINC PLATED STEEL SHEET HAVING EXCELLENT FATIGUE STRENGTH OF ELECTRICAL RESISTANCE SPOT WELDS, AND MANUFACTURING METHOD THEREOF

The present invention relates to a zinc plated steel sheet having excellent fatigue strength of electrical resistance spot welds, and a manufacturing method thereof. The zinc plated steel sheet according to an aspect of the present invention comprises a base steel sheet and a zinc-based plating laye...

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Bibliographische Detailangaben
Hauptverfasser:	LEE, Chung-Hwan, KANG, Ki-Cheol
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS 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 FERROUS OR NON-FERROUS ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to a zinc plated steel sheet having excellent fatigue strength of electrical resistance spot welds, and a manufacturing method thereof. The zinc plated steel sheet according to an aspect of the present invention comprises a base steel sheet and a zinc-based plating layer formed on the surface of the base steel sheet, wherein the concentration profile of one or two among oxygen, silicon, and manganese measured in the depth direction from the surface of the base steel sheet has a peak in the depth direction from the surface, and the absolute value of the difference between the depth at which the peak of the concentration profile of oxygen is formed and the depth at which the peak point of the concentration profile of silicon or manganese is formed is 0.5 µm or less.