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:
Feb. 16, 2021
Filed:
Jul. 23, 2012
Laurent Cretteur, Gouvieux, FR;
Qingdong Yin, Montataire, FR;
Francis Schmit, Clermont, FR;
Wolfram Ehling, Ghent, BE;
Laurent Cretteur, Gouvieux, FR;
Qingdong Yin, Montataire, FR;
Francis Schmit, Clermont, FR;
Wolfram Ehling, Ghent, BE;
ARCELORMITTAL INVESTIGACIÓN Y DESARROLLO, S.L., Sestao, ES;
Abstract
The invention relates principally to a welded steel part with a very high mechanical strength characteristics obtained by heating followed by hot forming, then cooling of at least one welded blank obtained by butt welding of at least one first and one second sheet consisting at least in part of a steel substrate and a pre-coating which is constituted by an intermetallic alloy layer in contact with the steel substrate, topped by a metal alloy layer of aluminum or aluminum-based alloy. This welded steel part claimed by the invention is essentially characterized in that the metal alloy layer () has been removed from the edges () in direct proximity to the weld metal zone (), while the intermetallic alloy layer () has been left in place, and in that over at least a portion of the length of the weld metal zone (), the ratio between the carbon content of the weld metal zone () and the carbon content of the substrate () of either the first or the second sheet () having the higher carbon content (Cmax) is between 1.27 and 1.59. The invention likewise relates to a method for the fabrication of a welded steel part as well as the use of this welded steel part for the fabrication of structural or safety parts for automotive vehicles.