A method for manufacturing a high strength galvanized steel sheet including a Si- and Mn-containing steel sheet, as a base steel sheet, and having excellent coating appearance, corrosion resistance, coating peel resistance at severe forming, and formability and a high strength galvanized steel sheet are provided. A base steel sheet having a chemical composition comprising C: 0.03% to 0.35%, Si: 0.01% to 0.50%, Mn: 3.6% to 8.0%, Al: 0.001% to 1.000%, P ¤ 0.10%, S ¤ 0.010%, and the balance comprising Fe and incidental impurities, on a percent by mass basis, is subjected to annealing and galvanization treatment, wherein the maximum steel sheet temperature in an annealing furnace is 600°C or higher and 700°C or lower, the steel sheet transit time in a temperature region of the maximum steel sheet temperature of 600°C or higher and 700°C or lower is specified to be 30 seconds or more and 10 minutes or less, and the dew point in an atmosphere is specified to be -45°C or lower.


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    Title :

    METHOD FOR MANUFACTURING HIGH STRENGTH GALVANIZED STEEL SHEET AND HIGH STRENGTH GALVANIZED STEEL SHEET


    Additional title:

    VERFAHREN ZUR HERSTELLUNG VON HOCHFEST VERZINKTEM STAHLBLECH UND HOCHFEST VERZINKTEM STAHLBLECH
    PROCÉDÉ DE FABRICATION D'UNE TÔLE D'ACIER GALVANISÉE DE HAUTE RÉSISTANCE ET D'UNE TÔLE D'ACIER GALVANISÉE DE HAUTE RÉSISTANCE


    Contributors:

    Publication date :

    2018-06-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    C23C Beschichten metallischer Werkstoffe , COATING METALLIC MATERIAL / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B62D MOTOR VEHICLES , Motorfahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / C22C Legierungen , ALLOYS / C23F Nichtmechanisches Entfernen metallischer Stoffe von Oberflächen , NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES



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