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1.发明公开公开(公告)号：US20240209485A1
公开(公告)日：2024-06-27
申请号：US18557354
申请日：2022-04-29
Applicant: ArcelorMittal
Inventor： Sebastian COBO , François STOUVENOT , Emmanuel LUCAS
CPC classification number: C22C38/22 , C21D1/673 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/26 , C22C38/32 , C21D2211/002 , C21D2211/004 , C21D2211/005 , C21D2211/008
Abstract: A steel sheet made of a steel having a composition including, C: 0.3-0.4%, Mn: 0.5-1.0%, Si: 0.4-0.8%, Cr: 0.1-1.0%, Mo: 0.1-0.5%, Nb: 0.01-0.1%, Al: 0.01-0.1%, Ti: 0.008-0.03%, B: 0.0005-0.003%, P≤0.020%, Ca≤0.001%, S≤0.004%, N≤0.005% and including optionally Ni
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公开(公告)号：US20250003037A1
公开(公告)日：2025-01-02
申请号：US18811384
申请日：2024-08-21
Applicant: ArcelorMittal
Inventor： Sebastian COBO , Emmanuel LUCAS , Matthieu SALIB , Guillaume STECHMANN
Abstract: A steel sheet has a chemical composition including in wt % C: 0.2-0.4%, Mn: 0.8-2.0%, Si: 0.1-0.5%, Al: 0.01-0.1%, Ti: 0.01-0.1%, B: 0.0005-0.005%, P≤0.040%, Ca≤0.01%, S≤0.006%, N≤0.01%. The steel sheet includes from the bulk to the surface of the coated steel sheet a bulk and a skin layer occupying the outermost 10% of the thickness on either side of the bulk. The bulk includes an inclusion population in which the sum of clustering indexes of MnS and TiN/Ti(C,N) inclusions is less than or equal to 300 μm/mm2. This allows to manufacture hot pressed parts having a tensile strength equal to or greater than 1300 MPa and a bending anisotropy equal to or lower than 7°.
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3.发明公开公开(公告)号：US20240254586A1
公开(公告)日：2024-08-01
申请号：US18625591
申请日：2024-04-03
Applicant: ArcelorMittal
Inventor： Sebastian COBO , Christian ALLELY , Martin BEAUVAIS , Anis AOUAFI , Emmanuel LUCAS
IPC: C21D9/48 , B32B15/01 , C21D1/673 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C23C2/02 , C23C2/06 , C23C2/12 , C23C2/28 , C23C2/40
CPC classification number: C21D9/48 , B32B15/012 , B32B15/013 , C21D1/673 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C22C38/001 , C22C38/004 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C23C2/02 , C23C2/022 , C23C2/024 , C23C2/06 , C23C2/12 , C23C2/28 , C23C2/40 , C21D2211/002 , C21D2211/008
Abstract: A method for manufacture of a hot-rolled steel sheet which includes: producing a liquid steel to which manganese, silicon, niobium, and chromium are added, the additions being made in a vacuum chamber, then desulfurizing the liquid metal without increasing its nitrogen content, then adding titanium, said additions being made so as to obtain a liquid metal having a chemical composition where the titanium and nitrogen contents satisfy: Ti/N>3.42, and the carbon, manganese, chromium, and silicon contents satisfy: 2.6C+Mn/5.3+Cr/13+Si/15>=1.1%, then casting a semi-finished product, then heating said semi-finished product to a temperature between 1250° C. and 1300° C. for a holding period at this temperature between 20 minutes and 45 minutes, then hot rolling said semi-finished product to a rolling end temperature TFL between 825° C. and 950° C., to obtain a hot-rolled sheet, then coiling said hot-rolled sheet at a temperature between 500° C. and 750° C. to obtain a hot-rolled and coiled sheet, then pickling the oxide layer formed in the previous steps.
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Patent Agency Ranking
公开(公告)号：US20250129459A1
公开(公告)日：2025-04-24
申请号：US18988468
申请日：2024-12-19
Applicant: ArcelorMittal
Inventor： Sebastian COBO , Emmanuel Lucas , Matthieu Salib , Guillaume Stechmann
Abstract: A steel sheet hasa chemical composition including in wt % C: 0.2-0.4%, Mn: 0.8-2.0%, Si: 0.1-0.5%, Al: 0.01-0.1%, Ti: 0.01-0.1%, B: 0.0005-0.005%, P≤0.040%, Ca≤0.01%, S≤0.006%, N≤0.01%. The steel sheet includes from the bulk to the surface of the coated steel sheet a bulk and a skin layer occupying the outermost 10% of the thickness on either side of the bulk. The bulk includes an inclusion population in which the sum of clustering indexes of MnS and TiN/Ti(C,N) inclusions is less than or equal to 300 μm/mm2. This allows to manufacture hot pressed parts having a tensile strength equal to or greater than 1300 MPa and a bending anisotropy equal to or lower than 7°.
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公开(公告)号：US20230019292A1
公开(公告)日：2023-01-19
申请号：US17943561
申请日：2022-09-13
Applicant: ArcelorMittal
Inventor： Sebastian COBO , Christian ALLELY , Martin BEAUVAIS , Anis AOUAFI , Emmanuel LUCAS
IPC: C21D9/48 , C22C38/02 , C22C38/44 , C22C38/54 , C21D8/02 , C21D1/673 , C22C38/00 , C22C38/50 , C21D6/00 , C23C2/06 , C22C38/48 , C22C38/06 , C23C2/40 , B32B15/01 , C23C2/28 , C23C2/02 , C23C2/12 , C22C38/04
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: 2.6 C + Mn 5.3 + Cr 13 + Si 15 ≥ 1.1 % . The sheet has a nickel content Nisurf at any point of the steel in the vicinity of the surface over a depth Δ, such that: Nisurf>Ninom, Ninom denoting the nominal nickel content of the steel, and such that, Nimax denoting the maximum nickel content within Δ: ( Ni max + Ni nom ) 2 × ( Δ ) ≥ 0.6 , and such that: ( Ni max - Ni nom ) Δ ≥ 0.01 and the surface density of all of the particles Di , and the surface density of the particles D(>2 μm) larger than 2 micrometers satisfy, at least to a depth of 100 micrometers in the vicinity of the surface of said sheet: Di+6.75 D(>2 μm) 2 μm) being 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.
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公开(公告)号：US20250137105A1
公开(公告)日：2025-05-01
申请号：US18988516
申请日：2024-12-19
Applicant: ArcelorMittal
Inventor： Sebastian COBO , Emmanuel LUCAS , Matthieu SALIB , Guillaume STECHMANN
Abstract: A steel sheet hasa chemical composition including in wt % C: 0.2-0.4%, Mn: 0.8-2.0%, Si: 0.1-0.5%, Al: 0.01-0.1%, Ti: 0.01-0.1%, B: 0.0005-0.005%, P≤0.040%, Ca≤0.01%, S≤0.006%, N≤0.01%. The steel sheet includes from the bulk to the surface of the coated steel sheet a bulk and a skin layer occupying the outermost 10% of the thickness on either side of the bulk. The bulk includes an inclusion population in which the sum of clustering indexes of MnS and TiN/Ti(C,N) inclusions is less than or equal to 300 μm/mm2. This allows to manufacture hot pressed parts having a tensile strength equal to or greater than 1300 MPa and a bending anisotropy equal to or lower than 7°.
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公开(公告)号：US20240401162A1
公开(公告)日：2024-12-05
申请号：US18690821
申请日：2022-08-26
Applicant: ArcelorMittal
Inventor： Sebastian COBO , Alice DUMONT , Pascal DIETSCH , Stéphanie MICHAUT
Abstract: A press hardened steel part having a composition including, by weight percent: C 0.2-0.34%, Mn 0.50-1.24%, Si 0.5-2%, P≤0.020%, S≤0.010%, N≤0.010%, and including optionally one or more of the following elements: Al: ≤0.2%, Cr≤0.8%, Nb≤0.06%, Ti≤0.06%, B≤0.005%, Mo≤0.35% the remainder of the composition being iron and unavoidable impurities resulting from the smelting. The press hardened steel part has a microstructure including, in surface fraction, 95% or more of tempered martensite and 5% or less of bainite, austenite or ferrite.
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8.发明公开公开(公告)号：US20240218476A1
公开(公告)日：2024-07-04
申请号：US18557348
申请日：2022-04-29
Applicant: ArcelorMittal
Inventor： Sebastian COBO , François STOUVENOT , Emmanuel LUCAS
IPC: C21D8/00 , B32B15/01 , C21D1/18 , C21D6/00 , C21D9/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54
CPC classification number: C21D8/005 , B32B15/01 , C21D1/18 , C21D6/004 , C21D6/005 , C21D6/008 , C21D9/0068 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/54 , C21D2211/008
Abstract: A steel sheet made of a steel having a composition including, C: 0.3-0.4%, Mn: 0.5-1.0%, Si: 0.4-0.8%, Cr: 0.1-1.0%, Mo: 0.1-0.5%, Nb: 0.01-0.1%, Al: 0.01-0.1%, Ti: 0.008-0.03%, B: 0.0005-0.003%, P≤0.020%, Ca≤0.001%, S≤0.004%, N≤0.005% and including optionally Ni
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