A high-strength formable austenitic Fe-25Mn-1Al-0.5C-0.1N steel, named as 'PRK-90', has been developed for automotive structural applications. The PRK-90 steel possesses three times higher tensile strength than those of the current automotive extra low carbon, ferritic steels, while exhibiting a good formability. The gradual formation of strain-induced deformation twins during plastic deformation was responsible for producing the very high strength (YS 500 MPa, UTS 862 MPa) with a good ductility (46 % uniform elongation). The integrated formability tests showed that the PRK-90 steel exhibited an excellent formability for automotive exterior applications. The alloy also possessses a good spot weldability for automated car assembling. The uses of this new austenitic high-strenght alloy to future automotive structure could provide a considerable weight reduction for fuel economy. The resultant laboratory experiment is being scaled up for pilot-scale production at the Pohang Iron and Steel Company (POSCO) in Korea.


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    Titel :

    High-strength formable automotive structural steel


    Weitere Titelangaben:

    Umformbare hochfeste Stähle für Fahrzeugkarosserieteile


    Beteiligte:
    Kim, Y.G. (Autor:in) / Kim, T.W. (Autor:in) / Hong, S.B. (Autor:in)


    Erscheinungsdatum :

    1993


    Format / Umfang :

    8 Seiten, 11 Bilder, 2 Tabellen, 10 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    High Strength Formable Sheet Steel

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