A Si-containing high-strength cold rolled steel sheet has a chemical composition comprising C: 0.02˜0.3 mass %, Si: 0.8˜2.0 mass %, Mn: 1.0˜5.0 mass % and the remainder being Fe and inevitable impurities with a ratio of Si content to Mn content (Si/Mn) exceeding 0.4, and has a tensile strength TS of not less than 780 MPa, wherein a metallic structure of the steel sheet surface contains polygonal ferrite and/or bainitic ferrite having a Si concentration of not more than 3.0 mass % and a grain size of not more than 10 μm and does not have a Si-containing oxide layer on the steel sheet surface.


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    Titel :

    Si-containing high strength cold rolled steel sheet, method of producing the same, and automotive members


    Beteiligte:
    MASUOKA HIROYUKI (Autor:in) / SUGIHARA REIKO (Autor:in) / KAWANO TAKASHI (Autor:in)

    Erscheinungsdatum :

    2019-01-08


    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 / C23F Nichtmechanisches Entfernen metallischer Stoffe von Oberflächen , NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES / C23G CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS , Reinigen oder Entfetten metallischer Werkstoffe durch chemische Verfahren, ausgenommen Elektrolyse



    High strength cold-rolled steel sheet for automotive applications

    Olsson, K. / Nilsson, K.I. | Tema Archiv | 1988


    Methods for Producing High-Strength, Cold-Rolled Steel Sheet

    Mould, P. R. | SAE Technical Papers | 1974




    PRODUCTION METHOD FOR A SI-CONTAINING HIGH STRENGTH COLD ROLLED STEEL SHEET

    MASUOKA HIROYUKI / SUGIHARA REIKO / KAWANO TAKASHI | Europäisches Patentamt | 2018

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