The invention relates to a cold-rolled, annealed and pre-coated steel sheet for the production of press-hardened parts, formed by a steel substrate for thermal treatment, having a carbon content C0 of between 0.07% and 0.5%, said content being expressed by weight, and a metal pre-coating on at least the two main faces of the steel substrate, characterised in that the substrate comprises a decarburised zone on the surface of each of the two main faces, the depth p50% of the decarburised zone being between 6 and 30 micrometres, p50% being the depth at which the carbon content is equal to 50% of the above-mentioned C0 content, as well as being characterised in that the steel sheet does not contain an iron oxide layer between the substrate and the metal pre-coating.


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    Titel :

    Method for the production of press-hardened, coated steel parts and pre-coated steel sheets that can be used for the production of said parts


    Beteiligte:

    Erscheinungsdatum :

    08.07.2015


    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 / C23C Beschichten metallischer Werkstoffe , COATING METALLIC MATERIAL




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    Freier Zugriff

    Press formability of various coated steel sheets

    Hishida, Y. / Yoshida, M. / Hisatsune, T. | Tema Archiv | 1990


    Series production of thixoformed steel parts

    Behrens, Bernd-Arno / Fischer, Dirk / Haller, Bjoern et al. | Tema Archiv | 2006


    Coated Steel Sheets for Corrosion-Resistant Automobiles

    Townsend, H. E. / NACE; Task Group T-14A on Automotive Corrosion | British Library Conference Proceedings | 1992