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. 07, 2024
Filed:
Sep. 13, 2022
Arcelormittal, Luxembourg, LU;
Sebastian Cobo, Ancy-sur-Moselle, FR;
Christian Allely, Metz, FR;
Martin Beauvais, Marange Silvange, FR;
Anis Aouafi, Feves, FR;
Emmanuel Lucas, Metz, FR;
Arcelor Mittal, Luxembourg, LU;
Abstract
A rolled steel sheet, for press hardening is provided, having a chemical composition where Ti/N>3.42, and the carbon, manganese, chromium and silicon contents satisfy: The sheet has a nickel content Niat any point of the steel in the vicinity of the surface over a depth Δ, such that: Ni>Ni, Nidenoting the nominal nickel content of the steel, and such that, Nidenoting the maximum nickel content within Δ: and such that: and the surface density of all of the particles D, and the surface density of the particles Dlarger than 2 micrometers satisfy, at least to a depth of 100 micrometers in the vicinity of the surface of said sheet:6.75<270Dand Dbeing expressed as number of particles per square millimeter, and said particles denoting all the oxides, sulfides, and nitrides, either pure or combined such as oxysulfides and carbonitrides, present in the steel matrix.