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:
Dec. 23, 2025
Filed:
May. 26, 2022
Arcelormittal, Luxembourg, LU;
Artem Arlazarov, Blenod les Pont-a-Mousson, FR;
Kangying Zhu, Metz, FR;
ArcelorMittal, Luxembourg, LU;
Abstract
A method for manufacturing a steel product includes providing a heated steel starting product at a temperature between 380° C. and 700° C., with a composition comprising, in percent by weight: 0.15%≤C≤0.40%, 1.5%≤Mn≤4.0%, 0.5%≤Si≤2.5%, 0.005%≤Al≤1.5%, with 0.8%≤Si+Al≤2.5%, S≤0.05%, P≤0.1%, at least one element chosen among Cr and Mo; subjecting the starting product to a hot forming step at a temperature between 700° C. and 380° C., to obtain a fully austenitic product; then quenching the product by cooling it down, to a quenching temperature QT lower than Ms in order to obtain a structure containing between 40% and 90% of martensite; then maintaining or reheating the product to a holding temperature PT between QT and 470° C. and holding the temperature PT for a duration Pt between 5 s and 600 s.