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:
Jul. 21, 2026
Filed:
Oct. 20, 2020
Arcelormittal, Luxembourg, LU;
Raisa Grigorieva, Metz, FR;
Florin Duminica, Tilff, BE;
Brahim Nabi, Leuven, BE;
Pascal Drillet, Rozérieulles, FR;
Thierry Sturel, Le Ban Saint Martin, FR;
ArcelorMittal, Luxembourg, LU;
Abstract
A press hardening method including: A. providing a steel sheet for heat treatment, being optionally precoated with an aluminum-based pre-coating, B. deposition of a hydrogen barrier pre-coating comprising chromium and not comprising nickel over a thickness from 10 to 550 nm, C. cutting the precoated steel sheet to obtain a blank, D. heat treating the blank at a furnace temperature from 800 to 970° C., during a dwell time from 1 to 12 minutes, in an atmosphere having an oxidizing power equal or higher than that of an atmosphere consisting of 1% by volume of oxygen and equal or smaller than that of an atmosphere consisting of 50% by volume of oxygen, and having a dew point between −30 and +30° C., E. transferring the blank into a press tool, F. hot-forming at a temperature from 600 to 830° C. to obtain a part, G. cooling the part.