公开(公告)号：US20240002993A1

公开(公告)日：2024-01-04

申请号：US18038104

申请日：2021-12-03

Applicant: ArcelorMittal

Inventor： Clément PHILIPPOT ,  Alice DUMONT ,  Deborah HERRY ,  Martin BEAUVAIS

IPC: C23C2/12 ,  C22C38/38 ,  C22C38/28 ,  C22C38/00 ,  C22C38/32 ,  C22C38/02 ,  C22C38/06 ,  C21D8/02 ,  C21D1/02 ,  C23C2/40 ,  B21C47/02 ,  C21D1/673 ,  C23C2/02 ,  C23G1/08

CPC classification number: C23C2/12 ,  C22C38/38 ,  C22C38/28 ,  C22C38/001 ,  C22C38/002 ,  C22C38/32 ,  C22C38/02 ,  C22C38/06 ,  C21D8/0257 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/0273 ,  C21D1/02 ,  C23C2/40 ,  B21C47/02 ,  C21D1/673 ,  C21D8/0278 ,  C23C2/024 ,  C23G1/08 ,  C21D2211/008 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/001

Abstract: A coated steel sheet and press hardened steel part having a composition including, by weight percent: C 0.15-0.25%, Mn 0.5-1.8%, Si 0.1-1.25%, Al 0.01-0.1%, Cr 0.1-1.0%, Ti 0.01-0.1%, B 0.001-0.004%, P≤0.020%, S≤0.010%, N≤0.010% the remainder of the composition being iron and unavoidable impurities resulting from the smelting. The press hardened steel part includes a bulk having a microstructure including, in surface fraction, more than 95% of martensite and less than 5% of bainite, a coating layer at the surface of the steel part, a ferritic interdiffusion layer between the coating layer and the bulk, and a ratio between the ferritic grain width in the interdiffusion layer GWint over prior austenite grain size in the bulk PAGSbulk, satisfying following equation (GWint/PAGSbulk)−1≥30%.

公开(公告)号：US20230203616A1

公开(公告)日：2023-06-29

申请号：US18177108

申请日：2023-03-01

Applicant: ArcelorMittal

Inventor： Martin BEAUVAIS ,  Alice DUMONT ,  Alexandre GIBOT ,  Astrid PERLADE ,  Kangying ZHU

IPC: C21D9/50 ,  B32B15/01 ,  C21D6/00 ,  C21D8/04 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC classification number: C21D9/50 ,  B32B15/013 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0405 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  B32B2605/00 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008

Abstract: A steel sheet for the manufacture of a press hardened part is provided, having a composition of: 0.15%≤C≤0.22%, 3.5%≤Mn

公开(公告)号：US20250137082A1

公开(公告)日：2025-05-01

申请号：US19011505

申请日：2025-01-06

Applicant: ArcelorMittal

Inventor： Alice DUMONT ,  Guillaume Stechmann ,  Emmanuel Lucas ,  Matthieu Salib

IPC: C21D9/00 ,  C21D1/18 ,  C21D6/00 ,  C21D7/13 ,  C21D8/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32

Abstract: A steel sheet having 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 is topped by a skin layer occupying the outermost 10% of the thickness on either side of the bulk, the density of TiN/Ti(C,N) inclusions in the skin being smaller than 240 particles/mm2 and the clustering index of MnS inclusions in the skin being lower than 110 μm/mm2. This allows to manufacture hot pressed parts having a tensile strength equal to or greater than 1300 MPa and a bending angle normalized to 1.5 mm and measured in the transverse direction strictly greater than 48°.

公开(公告)号：US20200149129A1

公开(公告)日：2020-05-14

申请号：US16616937

申请日：2018-06-01

Applicant: ArcelorMittal

Inventor： Martin BEAUVAIS ,  Alice DUMONT ,  Alexandre GIBOT ,  Astrid PERLADE ,  Kangying ZHU

IPC: C21D9/50 ,  C21D9/46 ,  C21D8/04 ,  B32B15/01 ,  C21D6/00 ,  C22C38/38 ,  C22C38/28 ,  C22C38/26 ,  C22C38/22 ,  C22C38/32 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00

Abstract: A steel sheet for the manufacture of a press hardened part is provided, having a composition of: 0.15%≤C%≤0.22%, 3.5%≤Mn

公开(公告)号：US20250137083A1

公开(公告)日：2025-05-01

申请号：US19011522

申请日：2025-01-06

Applicant: ArcelorMittal

Inventor： Alice DUMONT ,  Guillaume STECHMANN ,  Emmanuel LUCAS ,  Matthieu SALIB

IPC: C21D9/00 ,  C21D1/18 ,  C21D6/00 ,  C21D7/13 ,  C21D8/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/28 ,  C22C38/32

Abstract: A steel sheet having 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 is topped by a skin layer occupying the outermost 10% of the thickness on either side of the bulk, the density of TiN/Ti(C,N) inclusions in the skin being smaller than 240 particles/mm2 and the clustering index of MnS inclusions in the skin being lower than 110 μm/mm2. This allows to manufacture hot pressed parts having a tensile strength equal to or greater than 1300 MPa and a bending angle normalized to 1.5 mm and measured in the transverse direction strictly greater than 48°.

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

IPC: C21D1/18 ,  C21D1/673 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C23C2/06 ,  C23C2/12

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.

公开(公告)号：US20240399438A1

公开(公告)日：2024-12-05

申请号：US18690779

申请日：2022-09-06

Applicant: ArcelorMittal

Inventor： Arnaud COCU ,  Alice DUMONT

IPC: B21D22/02

Abstract: A high strength, high slenderness structural part having excellent energy absorption properties in the case of an impact is provided. In particular, a structural part for use in an automotive vehicle is provided. The structural part has an ultimate tensile strength higher than 1000 MPa, a yield strength to ultimate tensile strength ratio higher than 0.85, a bending angle normalized to 1.5 mm thickness higher than 55° and a slenderness ratio higher than 10.

公开(公告)号：US20230203617A1

公开(公告)日：2023-06-29

申请号：US18177109

申请日：2023-03-01

Applicant: ArcelorMittal

Inventor： Martin BEAUVAIS ,  Alice DUMONT ,  Alexandre GIBOT ,  Astrid PERLADE ,  Kangying ZHU

IPC: C21D9/50 ,  B32B15/01 ,  C21D6/00 ,  C21D8/04 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC classification number: C21D9/50 ,  B32B15/013 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0405 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  B32B2605/00 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008

Abstract: A steel sheet for the manufacture of a press hardened part is provided, having a composition of: 0.15%≤C≤0.22%, 3.5%≤Mn