Provided is a vehicle collision energy absorbing member excellent in collision energy absorbing performance in the axial direction upon collision. The vehicle collision energy absorbing member is formed of a high strength thin steel sheet having TS of at least 980 MPa and having an n-value and a limit bending radius Rc satisfying the following Formula: Rc / t ¤ 1.31 x ln(n) + 5.21. The use of the aforementioned high strength thin steel sheet allows the member to be stably buckled in the axial direction and crush-deformed into a bellows shape upon vehicle collision even if TS is 980 MPa or above. The high strength steel sheet used herein preferably includes a chemical composition containing, by mass%: C: 0.14 % to 0.30 %; Si: 0.01 % to 1.6 %; Mn: 3.5 % to 10 %; N: 0.0060 % or less; and Nb: 0.01 % to 0.10 %, and has a microstructure including a ferrite phase by 30 % to 70 % in volume fraction with respect to the entire microstructure and a secondary phase other than the ferrite phase, the ferrite phase having an average grain size of 1.0 µm or smaller, the secondary phase at least containing a retained austenite phase by at least 10 % in volume fraction to the entire microstructure, the retained austenite phase having an average spacing of 1.5 µm or less.


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    Titel :

    VEHICLE COLLISION ENERGY ABSORBING MEMBER HAVING HIGH COLLISION ENERGY ABSORBING POWER, AND METHOD FOR MANUFACTURING SAME


    Weitere Titelangaben:

    ELEMENT ZUR ABSORPTION DER ENERGIE EINES FAHRZEUGZUSAMMENSTOSSES MIT HOHER KOLLISIONSENERGIE-ABSORPTIONSKRAFT SOWIE HERSTELLUNGSVERFAHREN DAFÜR
    ÉLÉMENT D'ABSORPTION D'ÉNERGIE DE COLLISION D'UN VÉHICULE PRÉSENTANT UN FORT POUVOIR D'ABSORPTION D'ÉNERGIE DE COLLISION, ET SON PROCÉDÉ DE FABRICATION


    Beteiligte:
    TAKAGI SHUSAKU (Autor:in) / OKUDA KANEHARU (Autor:in) / TAMAI YOSHIKIYO (Autor:in) / FUJITA TAKESHI (Autor:in) / OKITSU YOSHITAKA (Autor:in) / NAITO TADASHI (Autor:in) / TAKAKI NAOKI (Autor:in) / SUGIURA TOMOAKI (Autor:in)

    Erscheinungsdatum :

    2017-09-27


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    C22C Legierungen , ALLOYS / B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL , Bearbeiten oder Verarbeiten von Blechen, Metallrohren, -stangen oder -profilen ohne wesentliches Abtragen des Werkstoffs / B62D MOTOR VEHICLES , Motorfahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS



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