Metallurgical factors affecting the press formability of the newly developed high strength sheet steels have been discussed. Dual phase steels, CHLY (cold-rolled sheet steel) and HTP-D(as-hot-rolled sheet steel), produced by control of cooling conditions after intercritical annealing or hot-rolling exhibit very low yield to tensile strength ratio and high n-value. Rephosphorized extra-low carbon steel, CHRX, produced by continuous annealing with rapid cooling is characterized by its extremely high r-value and low yield strength. CHLY, HTP-D and CHRX have large bake hardenability. Precipitation hardened steel, HTP-F(hot-rolled sheel steel), produced by adjusting carbon equivalent and sulfur content is suitable for manufacturing wheel rims owing to its good formability after flash but welding.


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    Title :

    Properties of formable high strength sheet steels for automotive use


    Additional title:

    Eigenschaften von verformbaren hochfesten Stahlblechen fuer den Automobilbau


    Contributors:
    Satoh, S. (author) / Tosaka, A. (author) / Kato, T. (author) / Shinozaki, M. (author) / Obara, T. (author) / Nishida, M. (author)


    Publication date :

    1983


    Size :

    10 Seiten, 19 Bilder, 2 Tabellen, 12 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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