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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    Title :

    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


    Contributors:

    Publication date :

    2015-07-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    C23C Beschichten metallischer Werkstoffe , COATING METALLIC MATERIAL / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / B62D MOTOR VEHICLES , Motorfahrzeuge




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