In a process for producing a cold- or hot-rolled steel strip from an ultrahigh-strength multiphase steel having a particular composition the required multiphase microstructure is generated during continuous heat treatment. The cold- or hot-rolled steel strip is heated in the continuous heat treatment furnace to a temperature in the range from 700 to 950° C. and the heat-treated steel strip is subsequently cooled from the heat treatment temperature at a cooling rate of from 15 to 100° C./s to a first intermediate temperature of from 300 to 500° C. followed by cooling at a cooling rate of from 15 to 100° C./s to a second intermediate temperature of from 200 to 250° C.; the steel strip is subsequently cooled at a cooling rate of from 2 to 30° C./s in air to room temperature or the cooling at a cooling rate of from 15 to 100° C./s is maintained from the first intermediate temperature to room temperature.


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    Titel :

    Ultrahigh-strength multiphase steel with improved properties during production and processing


    Beteiligte:
    SCHULZ THOMAS (Autor:in) / WEDEMEIER ANDREAS (Autor:in) / SPROCK WILFRIED (Autor:in) / FLAXA VOLKER (Autor:in) / LUTHER FRIEDRICH (Autor:in) / DENKS INGWER (Autor:in) / SCHULZ SVEN (Autor:in)

    Erscheinungsdatum :

    2019-04-30


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / B62D MOTOR VEHICLES , Motorfahrzeuge / C22C Legierungen , ALLOYS




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