Method for producing hardened parts from sheet steel

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 2/02 (2006.01) B21D 22/04 (2006.01) B21J 5/00 (2006.01) C21D 1/02 (2006.01) C21D 1/673 (2006.01) C23C 2/26 (2006.01)

Patent

CA 2533633

The invention relates to a method for producing hardened structural parts from sheet steel, comprising the following method steps: a) shaping of shaped parts made of sheet steel provided with cathodic corrosion protection, wherein b) prior to, during or after shaping of the shaped part a required final trim of the shaped part and possibly required punching, or the creation of a perforation pattern, are performed, wherein c) subsequently the shaped part is heated, at least over partial areas, under the admission of atmospheric oxygen to a temperature which permits austenizing of the steel material, and d) thereafter the structural part is transferred to a mold-hardening tool and mold-hardening is performed in the mold-hardening tool, wherein the structural part is cooled by the contact with and pressing by the mold-hardening tools and is hardened thereby.

L'invention concerne un procédé permettant de produire des éléments constitutifs, en tôle d'acier trempé, qui comprend les étapes suivantes : a) façonner des pièces moulées, à base d'une tôle d'acier munie d'un revêtement anticorrosion cathodique ; b) avant, pendant ou après le façonnage de la pièce moulée, il est prévu d'effectuer un cisaillement final nécessaire de la pièce moulée et éventuellement des matriçages requis ou bien de produire une configuration de perçage ; c) la pièce moulée est ensuite portée, en moins par endroits, sous apport d'oxygène atmosphérique, à une température qui permet une austénisation de l'acier, et d) l'élément constitutif est ensuite transféré dans un outil de durcissement par trempe, pour procédé à une opération de trempe, au cours de laquelle l'élément constitutif est refroidi et trempé, par application et compression dudit élément constitutif par les outils de durcissement par trempe.

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