Patents Assigned to ArcelorMittal
  • Method for producing a metallic coated steel sheet
    Patent number: 11131005
    Abstract: A method for producing a metallic coated steel sheet is provided. The method includes continuously annealing a steel sheet in a continuous annealing furnace and hot dip coating the steel sheet.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: September 28, 2021
    Assignee: ArcelorMittal
    Inventors: Jonas Staudte, Hubert Saint-Raymond, Michel Roger Louis Bordignon, Thierry Hourman, Pauline Briault
  • Method for producing a ultra high strength coated or not coated steel sheet and obtained sheet
    Patent number: 11124853
    Abstract: A method for producing a cold rolled steel sheet having a tensile strength ?1470 MPa and a total elongation TE?19%, the method comprising 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?0.5%, 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<Ms transformation point and between 150° C. and 250° C., and making a partitioning treatment by reheating the quenched steel sheet to a partitioning temperature PT between 350° C. and 420° C. and maintaining the steel sheet at this temperature during a partitioning time Pt between 15 seconds and 120 seconds.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: September 21, 2021
    Assignee: ARCELORMITTAL
    Inventors: Olga A. Girina, Damon Panahi
  • Method of a heat transfer of a non-metallic or metallic item
    Patent number: 11118091
    Abstract: A method of heat treatment of a non-metallic or metallic item is provided. The method includes at least one step A) of heat transfer between the item and a heat transfer fluid A? including a fluid medium and nanoparticles. The heat transfer fluid has a heat transfer coefficient above the heat transfer coefficient of water. The method also includes at least one step B) of heat transfer between the item and a heat transfer fluid B? including a fluid medium and nanoparticles. The heat transfer fluid B? has a heat transfer coefficient different from the heat transfer coefficient of A? and above the heat transfer coefficient of water. The heat transfer fluids A? and B? are different.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: September 14, 2021
    Assignee: ArcelorMittal
    Inventors: Maria Cabanas Corrales, David Noriega Perez
  • Method for producing an automotive structural part comprising a lowerside sill and a lower front pillar
    Patent number: 11103911
    Abstract: A method containing the steps of: providing an inner structural part blank having a L-shape and an outer structural part blank having a L-shape, the inner and outer structural part blanks being substantially planar; hot stamping the inner structural part blank to form an inner automotive structural part having an inner lowerside sill part and an inner lower front pillar part made of a single part with the inner lowerside sill part; hot stamping the outer structural part blank to form an outer automotive structural part having an outer lowerside sill part and an outer lower front pillar part made of a single part with the outer lowerside sill part; and assembling the inner automotive structural part and the outer automotive structural part to form the automotive structural part.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: August 31, 2021
    Assignee: ARCELORMITTAL
    Inventor: Ivan Viaux
  • Method for producing an inner automotive structural part comprising localized reinforced areas
    Patent number: 11097329
    Abstract: A method for producing an inner automotive structural part containing localized reinforced areas, the method containing the steps of: providing an inner upper front pillar blank, an inner center pillar blank and an inner side rail blank, hot stamping the inner upper front pillar blank, hot stamping the inner center pillar blank, hot stamping the inner side rail blank, wherein, the method contains, prior to the hot stamping steps, the steps of: attaching an inner upper front pillar reinforcement blank to a part of the inner upper front pillar blank, said inner upper front pillar reinforcement blank being hot stamped together with the inner upper front pillar blank, attaching an inner center pillar reinforcement blank to a part of the inner center pillar blank, said inner center pillar reinforcement blank being hot stamped together with the inner center pillar blank.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: August 24, 2021
    Assignee: ARCELORMITTAL
    Inventors: Ivan Viaux, Ives Drouadaine
  • Process for manufacturing a coated metal strip of improved appearance
    Patent number: 11098396
    Abstract: An installation for continuous hot-dip coating of a metal strip is provided. The installation includes a tank containing a bath of molten metal, a metal strip running through the bath and a confined wiping device. The confined wiping device includes at least two wiping nozzles placed on each side of a path of the strip after the strip has left the bath of molten metal. Each nozzle has at least one gas outlet orifice and an upper face. The confined wiping device also includes a confinement box adjacent each upper face. The confinement boxes are open on a face which faces the strip. Each box includes at least one upper part and two lateral parts.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: August 24, 2021
    Assignee: ArcelorMittal
    Inventors: Luc Diez, Jean-Michel Mataigne, Bertrand Orsal, Hubert Saint Raymond
  • Method for the preparation of aluminized steel sheets to be welded and then press hardened
    Patent number: 11097377
    Abstract: A method for the preparation of steel sheets for fabricating a welded steel blank is provided. The method includes procuring at least two pre-coated steel sheets, each having a pre-coating of an intermetallic alloy layer, topped by a layer of aluminum metal or aluminum alloy or aluminum-based alloy. The sheets have a principal face, an opposite principal face, and at least one secondary face. The sheets are positioned so a gap between 0.02 and 2 mm exists between the secondary faces. The secondary faces face each other. The positioning of the first and second sheets defines a median plane perpendicular to the principal faces. Layers of metal alloy are removed by melting and vaporization simultaneously on the principal faces, in a peripheral zone of the sheets, the peripheral zones being the zones of the principal faces closest in relation to the median plane.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: August 24, 2021
    Assignee: ArcelorMittal
    Inventors: Francis Schmit, Rene Vierstraete, Qingdong Yin, Wolfram Ehling
  • Method for hot-dip coating a steel strip and facility for implementing same
    Patent number: 11072846
    Abstract: A method for hot-dip coating of a steel strip running in a bath of liquid metal such as zinc, or metal alloy contained in a pan is provided. Dross which are formed during the coating and float at the surface of the bath are moved away from the surface of the strip by at least one inductor. Each inductor produces a sliding electromagnetic field oriented along a given direction and generates a magnetomotive force, and the magnetomotive forces displaced the dross towards a container intended to collect them and/or towards an area of the surface of the bath from which they are discharged. For at least one of the inductors, the direction of the respective sliding electromagnetic field is reversed intermittently so as to modify the flows of the dross inside the pan. A hot dip coating facility is also provided.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: July 27, 2021
    Assignee: ARCELORMITTAL
    Inventors: Marc Anderhuber, Alain Daubigny
  • Process and device for cooling a metal substrate
    Patent number: 11072839
    Abstract: A process for cooling a metal substrate running in a longitudinal direction, said process including ejecting at least one first cooling fluid jet on a first surface of said substrate and at least one second cooling fluid jet on a second surface of said substrate, said first and second cooling fluid jets being ejected at a cooling fluid velocity higher than or equal to 5 m/s, so as to form on said first surface and on said second surface a first laminar cooling fluid flow and a second laminar flow respectively, said first and second laminar cooling fluid flows being tangential to the substrate, said first and second laminar cooling fluid flows extending over a first predetermined length and a second predetermined length of the substrate respectively, said first and second lengths being determined so that the substrate is cooled from a first temperature to a second temperature by nucleate boiling.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: July 27, 2021
    Assignee: ARCELORMITTAL
    Inventors: Makhlouf Hamide, Charles Romberger, Jean-Luc Borean, Marie-Christine Régnier
  • Method for the preparation of a coated metal sheet, comprising the application of an aqueous solution containing an amino acid, and associated use in order to improve corrosion resistance
    Patent number: 11060174
    Abstract: The invention relates to a method for preparing a metal sheet (1) comprising at least the steps of: providing a steel substrate (3) having two faces (5), for which at least one is coated with a metal coating (7) comprising at least 40% by weight of zinc, applying on the outer surface (15) of the metal coating (7) an aqueous solution comprising an amino acid, and the metal sheet which may be obtained.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: July 13, 2021
    Assignee: ARCELORMITTAL
    Inventors: Lydia Rachiele, Herve Derule, Delphine Thaï
  • Part with very high mechanical properties from a rolled coated sheet
    Patent number: 11060161
    Abstract: The present invention provides a steel part. The steel part includes a steel precoated with a zinc-based alloy including, the contents being expressed by weight, from 0.5 to 2.5% aluminum and, optionally, one or more elements chosen from the group of: Pb?0.003%; Sb?0.003%; Bi?0.003%; 0.002%.?Si?0.070%; La<0.05%; and Ce<0.05%. A balance of the precoat includes zinc and inevitable impurities. The steel part also includes a compound formed by at least one heat treatment for alloying between the steel and the precoat. The compound includes over more than 90% of its thickness, at least one Fe/Zn-based phase, the iron weight content of which is equal to 65% or higher and the Fe/Zn ratio of which is between 1.9 and 4. A structural or safety part is also provided.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: July 13, 2021
    Assignee: ArcelorMittal
    Inventors: Alain Bello, Vivian Fabbri, Gerard Dugelay
  • Method for determining deformation, and associated equipment comprising a plurality of corresponding wavelength couples each including a determined wavelength and a corresponding Bragg wavelength
    Patent number: 11054248
    Abstract: A method of determination of deformation along a first direction of an equipment (1) in contact with hot material and including an inner face (3) in contact with the hot material and an outer face (4) opposite to the inner face (3) is provided. An equipment (1) in contact with hot material provided with means to determine its deformation along a first direction is also provided.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: July 6, 2021
    Assignee: ArcelorMittal
    Inventors: Mounir Amourak, Thiago Rabelo Nunes Campos, Herve Pierret, Pierre-Jean Krauth, Dominique Sert, Joseph Iezzi, Michel Nogues
  • Method for producing a sandwich structure
    Patent number: 11046054
    Abstract: A process for manufacturing a sandwich structure including two steel skin layers separated by a polymeric layer is provided. The process includes dimensioning the sandwich structure according to a target to be attained by defining the target to be attained by three target values, i.e., tensile strength Tc expressed in kN/mm, bending stiffness Bc expressed in kN/mm, and surface mass Mc expressed in Kg/m2, defining a tolerance for the attainment of target values, defining the sandwich structure by five variables, i.e.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: June 29, 2021
    Assignee: ArcelorMittal
    Inventor: Denis Jacquet
  • Method for making a high strength multiphase steel
    Patent number: 11047020
    Abstract: A method for producing a cold rolled and hot dip coated steel sheet is provided. The method includes casting a steel into a slab, reheating, hot rolling, cooling, coiling, descaling and cold rolling the slab. The cold rolled steel sheet is annealed so a layer of iron oxide forms on the surface with an internal oxidation underneath. The sheet is then heated so the surface is oxidized and the layer of iron oxide is fully reduced to obtain an internally oxidized depth between 200 nm and 100 ?m which includes one or more of Si, Mn, Al, Ti containing oxides. The sheet is then hot dip coated and cooled.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: June 29, 2021
    Assignee: ARCELORMITTAL
    Inventors: Dongwei Fan, Hyun Jo Jun, John A. Rotole
  • Coated steel strips, coated stamped products and methods
    Patent number: 11041226
    Abstract: A pre-coated steel strip is provided. The steel strip includes a strip of base steel having a length, a width, a first side, and a second side. The length of the strip is at least 100 m and the width is at least 600 mm. An aluminum or an aluminum alloy pre-coating is on at least part of at least one of the first or second sides of the strip of base steel. A thickness tp of the pre-coating is from 20 to 33 micrometers at every location on at least one of the first or second sides. Processes, coated stamped products and land motor vehicles are also provided.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: June 22, 2021
    Assignee: ArcelorMittal
    Inventors: Pascal Drillet, Dominique Spehner, Ronald Kefferstein
  • Galvannealed steel sheet
    Patent number: 11035020
    Abstract: A method for producing a coated steel sheet having a tensile strength of at least 1450 MPa and a total elongation of at least 17% is provided. The method includes providing a cold rolled steel sheet having a chemical composition in weight %: 0.34%?C?0.45%, 1.50%?Mn?2.30%, 1.50%?Si?2.40%, 0%<Cr?0.7%, 0%?Mo?0.3%, 0.10%?Al?0.7%, optionally 0%?Nb?0.05%, and a remainder of Fe and unavoidable impurities. The sheet is annealed at an annealing temperature higher than the Ac3 transformation point of the steel, quenched to a quenching temperature lower than the Ms transformation point of the steel and between 150° C. and 250° C., reheated to a partitioning temperature between 350° C. and 450° C., maintained at the partitioning temperature for at least 80 s, then coated by galvannealing, with an alloying temperature between 470° C. and 520° C. A steel sheet is also provided.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: June 15, 2021
    Assignee: ARCELORMITTAL
    Inventors: Olga A. Girina, Damon Panahi
  • Reinforcement element for a vehicle, method for producing the same and door assembly
    Patent number: 11027600
    Abstract: The reinforcement element for reinforcing the structure of a door of a vehicle extends along a main direction and comprises at least a main portion having a reinforcing cross-section (40) extending in a plane substantially perpendicular to the main direction. The reinforcing cross-section (40) includes at least four adjacent branches (42a, 42b, 42c, 42d, 42e, 42f, 42g), each extending in different directions, two successive branches forming a non-zero angle, at least two of the non-zero angles being of opposite signs.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: June 8, 2021
    Assignee: ARCELORMITTAL
    Inventors: Nicolas Schneider, Yves Drouadaine
  • Method for the production of a coated metal sheet, comprising the application of an aqueous solution containing an amino acid, and associated use in order to improve tribological properties
    Patent number: 11008660
    Abstract: The invention relates to a method for preparing a metal sheet (1) comprising at least the steps: providing a steel substrate (3) having two faces (5), at least one of which is coated with a metal coating (7) comprising at least 40% by weight of zinc, applying on the outer surface (15) of the metal coating (7) an aqueous solution comprising an amino acid, and the metal sheet which may be obtained.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: May 18, 2021
    Assignee: ARCELORMITTAL
    Inventors: Lydia Rachiele, Hervé Derule, Delphine Thaï
  • Preparation method of a coated sheet comprising the application of an aqueous solution comprising an amino acid and its associated use for improving the compatibility with an adhesive
    Patent number: 11007750
    Abstract: A method for preparing a metal sheet (1) is provided including at least the steps for: providing a steel substrate (3) having two faces (5), at least one of which is coated with a metal coating (7) comprising at least 40% by weight of zinc, applying on the outer surface (15) of the metal coating (7) an aqueous solution comprising an amino acid, and the metal sheet which may be obtained.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: May 18, 2021
    Assignee: ARCELORMITTAL
    Inventors: Lydia Rachiele, Herve Derule, Delphine Thai
  • Method and apparatus for determining the health and remaining service life of austenitic steel reformer tubes and the like
    Patent number: RE48734
    Abstract: Testing methods and apparatus for testing the health of steel tubes used in reformers and other tubes and pipes used in other high temperature applications. The method includes the steps of transmitting two sinusoidal electromagnetic signals, each having a different frequency F1 and F2, into the reformer tube, receiving a response signal, and analyzing the received response signal's intermodulation frequencies to determine the state of the steel reformer tube.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: September 14, 2021
    Assignee: ArcelorMittal
    Inventors: Michael A. Masleid, Zofia E. Niemczura, George B. Tsvik