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.

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%.

公开(公告)号：US20250003046A1

公开(公告)日：2025-01-02

申请号：US18800464

申请日：2024-08-12

Applicant: ArcelorMittal

Inventor： Clément PHILIPPOT ,  Doriane Serra ,  Hubert Salmon Legagneur ,  David Dussaussois

IPC: C23C2/12 ,  B21D22/02 ,  B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/28 ,  C23C2/40

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: 1 ⁢ 6 ≤ E pc

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.

公开(公告)号：US20240408637A1

公开(公告)日：2024-12-12

申请号：US18697578

申请日：2022-10-06

Applicant: ArcelorMittal

Inventor： Vincent RUWET ,  Charles HANQUET ,  Jacques HERNANDEZ ,  Yves CHARBONNEL

IPC: B05C1/08

Abstract: A coating apparatus for the continuous manufacturing of steel strips coated with a varnish for electrical applications including a tank, a coating roll and an applicator roll wherein: the tank is able to contain a varnish solution and is configured such that the coating roll dips into the varnish solution, the applicator roll 4 is configured to be in contact with the coating roll 3 and the steel strip S, is configured to homogeneously coat the steel strip in the width of the steel strip and the surface of the applicator roll has a shore A hardness from 40 to 60.

公开(公告)号：US12157922B2

公开(公告)日：2024-12-03

申请号：US17225033

申请日：2021-04-07

Applicant: ArcelorMittal

Inventor： Olga A. Girina ,  Damon Panahi

IPC: C21D9/46 ,  B32B15/00 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D1/18 ,  C21D1/19 ,  C21D1/25 ,  C21D1/78 ,  C21D8/02 ,  C21D8/04 ,  C21D9/48 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/18 ,  C22C38/22 ,  C22C38/26 ,  C22C38/34 ,  C22C38/38 ,  C23C2/04 ,  C23C2/06 ,  C23C2/12 ,  C23C2/28 ,  C23C2/40 ,  C23C30/00 ,  C25D3/22 ,  C25D5/36 ,  C25D7/00 ,  C25D7/06

Abstract: A method IS for producing a cold rolled steel sheet having a tensile strength ≥1470 MPa and a total elongation TE≥19%. The method includes the steps of annealing at an annealing temperature AT≥Ac3 a non-treated steel sheet whose chemical composition contains in weight %: 0.34%≤C≤0.40%, 1.50%≤Mn≤2.30%, 1.50≤Si≤2.40%, 0%≤Cr≤0.7%, 0%≤Mo≤0.3%, 0.01%≤Al≤0.07%, the remainder being Fe and unavoidable impurities, quenching the annealed steel sheet by cooling it to a quenching temperature QT

公开(公告)号：US12146211B2

公开(公告)日：2024-11-19

申请号：US17312645

申请日：2019-11-21

Applicant: ArcelorMittal

Inventor： George Jay Fraley ,  Frederick Fletcher

IPC: C22C38/48 ,  C21D1/18 ,  C21D6/00 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/46

Abstract: A cryogenic pressure vessel of formed of an ASTM A553 Type 1 cryogenic steel alloy including in wt. %: C: 0.01-0.04; Mn: up to 2.0; P: up to 0.02; S: up to 0.15; Si: up to 1.0; Ni: 7-11; Cr: up to 1.0; Mo: up to 0.75; V: up to 0.2; Nb: up to 0.1; Al: up to 0.1; and N: up to 0.01. The steel alloy may have an ultimate tensile strength of at least 900 MPa, a total elongation of at least 20%; a microstructure including between 5 and 20 area % reverted austenite and the remainder tempered martensite; a transverse Charpy impact energy of at least 27 J at −196° C.; and a lateral expansion of at least 0.381 mm at −196° C.

公开(公告)号：US12110570B2

公开(公告)日：2024-10-08

申请号：US18135962

申请日：2023-04-18

Applicant: ArcelorMittal

Inventor： Hyun Jo Jun

IPC: C21D9/46 ,  B32B15/01 ,  C21D1/20 ,  C21D1/25 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C22C38/26 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

CPC classification number: C21D9/46 ,  B32B15/013 ,  C21D1/20 ,  C21D1/25 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0247 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/12 ,  C22C38/26 ,  C22C38/38 ,  C23C2/02 ,  C23C2/022 ,  C23C2/06 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A cold rolled, coated and post batch annealed steel sheet produced by a method is provided. The method includes cold rolling a steel sheet; coating the cold rolled steel sheet with a zinc or zinc alloy coating, the cold rolled, coated steel sheet having an initial hole expansion and an initial yield strength and post batch annealing the cold rolled, coated steel sheet at a tempering temperature in a range from 150 to 650° C., the post batch annealed steel sheet having a final hole expansion and a final yield strength. The steel sheet includes (in wt. %) C—0.1-0.3%, Mn—1-3%, Si—0.5-3.5%, Al—0.05-1.5% and Mo+Cr being between 0-1.0%. The final hole expansion is at least 80% greater than the initial hole expansion and the final yield strength is at least 30% greater than the initial yield strength.

公开(公告)号：US12091724B2

公开(公告)日：2024-09-17

申请号：US18094503

申请日：2023-01-09

Applicant: ArcelorMittal

Inventor： Anirban Chakraborty ,  Hassan Ghassemi-Armaki

IPC: C21D9/46 ,  B23K11/11 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/32 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23C28/02 ,  B23K103/04 ,  B23K103/20

CPC classification number: C21D9/46 ,  B23K11/11 ,  C21D8/0273 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/32 ,  C23C2/02 ,  C23C2/022 ,  C23C2/0224 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C23C28/025 ,  C23C28/027 ,  B23K2103/04 ,  B23K2103/20 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009

Abstract: Galvannealed steel sheet having a steel substrate coated with a first alloy layer with iron and nickel directly topped by a second alloy layer based on zinc, the first and second alloyed layers being alloyed through diffusion such that the second alloy layer includes from 5 to 15 wt. % of iron, from 0 to 15 wt. % of nickel, a balance being zinc.

公开(公告)号：US12065724B2

公开(公告)日：2024-08-20

申请号：US16467371

申请日：2017-12-19

Applicant: ArcelorMittal

Inventor： Jean-Marc Pipard ,  Marc Olivier Thenot

IPC: C22C38/04 ,  C21D8/02 ,  C21D9/46 ,  C22C38/02 ,  C22C38/06 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28

CPC classification number: C22C38/04 ,  C21D8/0226 ,  C21D9/46 ,  C22C38/02 ,  C22C38/06 ,  C23C2/02 ,  C23C2/0224 ,  C23C2/06 ,  C23C2/28 ,  C23C2/29 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A tempered and coated steel sheet having a composition containing the following elements, expressed in percentage by weight: 0.17%≤carbon≤0.25%, 1.8%≤manganese≤2.3%, 0.5%≤silicon≤2.0%, 0.03%≤aluminum≤1.2%, sulphur≤0.03%, phosphorus≤0.03%, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet containing in area fraction, 3 to 20% residual austenite, at least 15% of ferrite, 40 to 85% tempered bainite and a minimum of 5% of tempered martensite, wherein cumulated amounts of tempered martensite and residual austenite is between 10 and 30%. The composition may also contain one or more of the following elements chromium≤0.4%, molybdenum≤0.3%, niobium≤0.04%, titanium≤0.1%. Methods of manufacturing and use of the tempered and coated steel sheets are also described.