The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2022
Filed:
Apr. 13, 2017
Salzgitter Flachstahl Gmbh, Salzgitter, DE;
Volkswagen Aktiengesellschaft, Wolfsburg, DE;
Thomas Koll, Braunschweig, DE;
Marc Debeaux, Hildesheim, DE;
Friedrich Luther, Gehrden, DE;
Christian Fritzsche, Salzgitter, DE;
Stefan Mütze, Peine, DE;
Frank Beier, Staufenberg, DE;
Matthias Graul, Brome, DE;
Jan-Frederik Lass, Wolfsburg, DE;
Haucke-Frederik Hartmann, Herzberg, DE;
SALZGITTER FLACHSTAHL GMBH, Salzgitter, DE;
VOLKSWAGEN AKTIENGESELLSCHAFT, Wolfsburg, DE;
Abstract
In a component made of press-form-hardened, aluminium-based coated steel sheet, the coating has a covering which contains aluminum and silicon applied in the hot-dip process. The press-form-hardened component in the transition region between steel sheet and covering has an inter-diffusion zone I, wherein, depending on the layer application of the covering before heating and press hardening, the thickness of the inter-diffusion zone I obeys the following formula: I [μm]<(1/35)×application on both sides [g/m]+(19/7). Formed on the inter-diffusion zone I is a zone having various intermetallic phases having an average total thickness between 8 and 50 μm, on which zone there is in turn arranged a covering layer containing aluminum oxide and/or hydroxide having an average thickness of at least 0.05 μm to at most 5 μm.