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    Press hardening method
    82.
    发明授权
    Press hardening method 有权

    公开(公告)号：US12270087B2

    公开(公告)日：2025-04-08

    申请号：US17771862

    申请日：2020-10-20

    Applicant: ArcelorMittal

    Inventor： Raisa Grigorieva ,  Florin Duminica ,  Brahim Nabi ,  Pascal Drillet ,  Thierry Sturel

    IPC: C21D7/13 ,  C21D8/02 ,  C23C2/12 ,  C23C2/26 ,  C23C2/28 ,  C23C14/35

    Abstract: press hardening method includes the following steps: A. the provision of a steel sheet for heat-treatment, precoated with a zinc- or aluminum-based pre-coating, B. the deposition of a hydrogen barrier pre-coating over a thickness from 10 to 550 nm, and comprising at least one element chosen from among: nickel, chromium, magnesium, aluminum and yttrium, C. batch annealing of the precoated steel sheet to obtain a pre-alloyed steel sheet, the cooling after the batch annealing being performed at a speed of 29.0° C.h−1 or less, D. the cutting of the pre-alloyed steel sheet to obtain blank, E. thermal treatment of the blank to obtain a fully austenitic microstructure in the steel, F. the transfer of the blank into a press tool, G. the hot-forming of the blank to obtain a part, H. the cooling of the part obtained at step G).

    CRACK-CONTAINING HOT-STAMPED COATED STEEL PART WITH EXCELLENT SPOT-WELDABILITY AND EXCELLENT PAINTING ADHESION
    85.
    发明申请
    CRACK-CONTAINING HOT-STAMPED COATED STEEL PART WITH EXCELLENT SPOT-WELDABILITY AND EXCELLENT PAINTING ADHESION 有权

    公开(公告)号：US20250034684A1

    公开(公告)日：2025-01-30

    申请号：US18811753

    申请日：2024-08-21

    Applicant: ArcelorMittal

    Inventor： Clément PHILIPPOT ,  Doriane SERRA ,  Hubert SALMON LEGAGNEUR ,  David DUSSAUSSOIS

    IPC: C22C38/04 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/14 ,  C23C2/12

    Abstract: A hot-stamped coated steel part includes a steel substrate and an aluminum alloy coating comprising, proceeding from steel substrate outwards, an interdiffusion layer and an outer layer. The total thickness of the coating ecoating and the thickness of the interdiffusion layer eIDL satisfy the following condition: with 40 ≤ E pc ≤ 80 E pc = ( 33.3 - e IDL 0.9 + e IDL - e coating ) 2 - 148 ⁢ ( e IDL - e coating ) - ( 33.3 - e IDL 0.9 + e IDL - E coating ) The hot-stamped coated steel part comprises an undeformed portion having a thickness ePflat from 0.6 mm to 3.5 mm, and at least one deformed portion. A lineic density of cracks dC in the coating in the undeformed portion is higher than or equal to a minimum lineic density of cracks dCmin(ePflat) defined as: dc min ( e pflat ) - 15.5 + 91 * e - 7.44 - 2.88 * arctan ⁡ ( 5.49 * ( e pflat - 1.71 ) ) - 106.5 * e - 8.62 - 3.34 * arctan ⁡ ( 5.49 * ( e pflat - 1.71 ) )

    Facade element, building facade and process for the assembling of such a building facade
    86.
    发明授权
    Facade element, building facade and process for the assembling of such a building facade 有权

    公开(公告)号：US12209406B2

    公开(公告)日：2025-01-28

    申请号：US17778970

    申请日：2020-11-26

    Applicant: ArcelorMittal

    Inventor： Frédéric Delcuve ,  Peggy Schouller

    IPC: E04B1/66 ,  E04B2/92 ,  E04C2/292

    Abstract: A facade element (1D), to be fastened to a building structure with other such facade elements (1A, 1B, 1C) to build one of the external walls of the building. The facade element includes an assembly of sandwich panels fastened to a metal framework, an upper waterproofing membrane that covers up an upper edge of the facade element, and a lower waterproofing membrane (5D) fixed to the inner face of the facade element. The lower waterproofing membrane extends beyond a lower edge of the facade element, up to an outer face of another facade element (1B) placed below. Both the upper and lower waterproofing membranes have overhanging parts (51D), extending beyond the left (35D) and right edges of the facade element. A building facade, and to a process for the assembling of a building facade is also provided.

    ATMOSPHERE FURNACE CONTROL
    87.
    发明申请
    ATMOSPHERE FURNACE CONTROL 有权

    公开(公告)号：US20250019791A1

    公开(公告)日：2025-01-16

    申请号：US18716356

    申请日：2022-12-13

    Applicant: ArcelorMittal

    Inventor： Ahmed KHELASSI ,  Walter DAL'MAZ SILVA ,  Morvan PLUNIAN

    IPC: C21D9/56 ,  C21D11/00

    Abstract: A method for regulating an atmosphere A inside a furnace, wherein a steel strip having a composition and an exposed surface area A1 is heat treated from a time T0 to a time TS1END and a steel strip, having a composition and an exposed surface area is heat treated from a time TS2START to a time TN, including the following steps: a data acquisition step, an optimisation step and an injection of H2O.

    Low density Hot rolled steel, method of production thereof and use of such steel to produce vehicle parts
    88.
    发明申请
    Low density Hot rolled steel, method of production thereof and use of such steel to produce vehicle parts 有权

    公开(公告)号：US20250019787A1

    公开(公告)日：2025-01-16

    申请号：US18715947

    申请日：2021-12-10

    Applicant: ArcelorMittal

    Inventor： Xavier GARAT ,  Pascal LORENZINI

    IPC: C21D9/46 ,  B32B15/01 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06

    Abstract: A low density hot rolled steel including of 0.12%≤carbon≤0.25%, 3%≤manganese≤10%, 3.5%≤aluminum≤6.5%, 0%≤phosphorus≤0.1%, 0%≤sulfur≤0.03%, 0%≤nitrogen≤0.1%, 0%≤silicon≤2%, 0.01%≤niobium≤0.03%, 0.01%≤titanium≤0.2%, 0%≤molybdenum≤0.5%, 0%≤chromium≤0.6%, 0.01%≤copper≤2.0%, 0.01%≤nickel≤3.0%, 0%≤calcium≤0.005%, 0%≤boron≤0.01%, 0%≤Magnesium≤0.005%, 0%≤Zirconium≤0.005%, 0%≤Cerium≤0.1%, and the balance including iron and unavoidable impurities, the steel sheet having a microstructure including of ferrite from 60% to 80%, 10% to 35% kappa carbides (Fe,Mn)3AlCx, where x is lower than or equal to 1 and austenite from 0% to 10% wherein the microstructure grains having less than 4 GPa nano-hardness must be more than 45% and microstructure grains having nano-hardness of more than 5 GPa must be less than 10%.

    HEAT SPREADER MATERIAL
    90.
    发明申请
    HEAT SPREADER MATERIAL 有权

    公开(公告)号：US20240409800A1

    公开(公告)日：2024-12-12

    申请号：US18701558

    申请日：2022-09-01

    Applicant: ArcelorMittal

    Inventor： Cristina BLANCO ROLDAN ,  Abel ALVAREZ-ALVAREZ ,  David NORIEGA PEREZ ,  Jorge RODRIGUEZ GARCIA ,  Marcos PEREZ RODRIGUEZ ,  Roberto SUAREZ SANCHEZ

    IPC: C09K5/14 ,  B32B7/12 ,  B32B9/00 ,  B32B9/04 ,  C04B37/00 ,  H01L23/373

    Abstract: A method for manufacturing a heat spreader including the steps of i. depositing an adhesive on a major surface of at least one graphite layer, to obtain at least one graphite layer coated by an adhesive layer, wherein ii. positioning the at least one graphite layer coated by an adhesive layer on top of each other so as to form a first stack of layers alternating graphite layer and adhesive layer iii. positioning a graphite layer having a thickness from 10 to 200 μm, on the first stack of layers so as to form a second stack of layers, having a graphite layer as top and bottom layers iv. compressing the second stack of layer with a pressure from 7 to 20 MPa to form a graphite-based laminate, v. heating the graphite-based laminate such that the solvent of the adhesive is removed.

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