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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.:

US 10900105 B1

PDFFull Text
Date of Patent:
Jan. 26, 2021

Filed:

May. 27, 2013

Low-density hot-or cold-rolled steel, method for implementing same and use thereof

Applicant:

Arcelormittal, Luxembourg, LU;

Inventors:

Astrid Perlade, Le Ban Saint-Martin, FR;

Ian Alberto Zuazo Rodriguez, Metz, FR;

Xavier Garat, Homecourt, FR;

Assignee:

ArcelorMittal, Luxembourg, LU;

Attorney:

Davidson, Davidson & Kappel, LLC

Primary Examiner:

Colin W Slifka

Int. Cl.
CPC ...
C22C 38/14 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C21D 6/00 (2006.01); C21D 8/04 (2006.01); B21B 1/46 (2006.01); B21B 45/02 (2006.01); B21C 47/02 (2006.01);
U.S. Cl.
CPC ...
C22C 38/14 (2013.01); B21B 1/463 (2013.01); B21B 45/0203 (2013.01); B21C 47/02 (2013.01); C21D 6/005 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0436 (2013.01); C21D 8/0473 (2013.01); C21D 9/46 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C21D 2211/001 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01);
Abstract

A rolled steel sheet is provided. The rolled steel sheet has a mechanical strength greater than or equal to 600 MPa and an elongation at fracture that is greater than or equal to 20%. A a method for its fabrication is also provided. The chemical composition of the steel sheet includes 0.10≤C≤0.30%, 6.0≤Mn≤15.0%, 6.0≤Al≤15.0%, and optionally one or more elements selected from among: Si≤2.0%, Ti≤0.2%, V≤0.6% and Nb≤0.3%. The remainder of the composition includes iron and the unavoidable impurities resulting from processing. The ratio of the weight of manganese to the weight of aluminum is such that The microstructure of the sheet includes ferrite, austenite and up to 5% Kappa precipitates in area fraction.

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