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:
Nov. 20, 2018
Filed:
Feb. 01, 2010
Isabelle Thirion, Hagondange, FR;
Thomas Vietoris, Berlin, DE;
Raisa Grigorieva, Metz, FR;
Pascal Drillet, Rozerieulles, FR;
Ludwig Schaller, Reichertshofen, DE;
Karl Michael Bader, Ingolstadt, DE;
Uwe Paar, Kassel, DE;
Michael Alsmann, Baunatal, DE;
Isabelle Thirion, Hagondange, FR;
Thomas Vietoris, Berlin, DE;
Raisa Grigorieva, Metz, FR;
Pascal Drillet, Rozerieulles, FR;
Ludwig Schaller, Reichertshofen, DE;
Karl Michael Bader, Ingolstadt, DE;
Uwe Paar, Kassel, DE;
Michael Alsmann, Baunatal, DE;
ARCELORMITTAL INVESTIGACION Y DESARROLLO, S.L., Bizkaia, ES;
Abstract
A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order: providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the precoating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cutting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature Tcomprised between T−10° C. and T, Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature Tup to a temperature Tcomprised between 840 and 950° C. under non protective atmosphere with a heating rate V comprised between 30° C./s and 90° C./s, V being the heating rate between the temperature Tand the temperature T, in order to obtain a coated heated blank, then soaking the coated heated blank at said temperature Tfor a time tcomprised between 20 s and 90 s, then hot stamping the blank in order to obtain a hot stamped coated part, then cooling said stamped part at a cooling rate in order to form a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.