MT ArcelorMittal

ArcelorMittal SA
Company
Patents are sorted by USPTO publication date, most recent first
GRANT
Utility
Process for manufacturing a coated metal strip of improved appearance
28 Jul 20
An installation for continuous hot-dip coating of a metal strip is provided.
Luc Diez, Jean-Michel Mataigne, Bertrand Orsal, Hubert Saint Raymond
Filed: 8 Jun 18
APP
Utility
Method of continuous manufacturing of solidified steelmaking slag and associated device
23 Jul 20
A method of continuous manufacturing of solidified steelmaking slag including the steps of solidifying molten steelmaking slag comprising at least 2% in weight of free lime so as to produce solidified slag particles having a diameter below 1 mm, the molten steelmaking slag being put in contact with at least a first carbonation gas during such solidification, cooling the solidified slag particles down to a temperature below or equal to 300° C., in a closed chamber, the solidified slag particles being put in contact with at least one second carbonation gas during such cooling.
Eric DE CONINCK, Ivonne INFANTE, Rafael MATTOS DOS SANTOS, Ghania OUNOUGHENE, Thomas VAN GERVEN
Filed: 28 Sep 17
APP
Utility
Method for Producing a High Strength Coated Steel Sheet having Improved Strength, Formability and Obtained Sheet
16 Jul 20
A method is for producing a high strength coated steel sheet having an improved ductility and an improved formability, and a chemical composition containing: 0.13%≤C≤0.22%, 1.9%≤Si≤2.3%, 2.4%≤Mn≤3%, Al≤0.5%, Ti≤0.05%, Nb≤0.05%, the remainder being Fe and unavoidable impurities.
Dongwei FAN, Hyun Jo JUN, Rashmi MOHANTY, Pavan K. C. VENKATASURYA
Filed: 23 Mar 20
APP
Utility
Hot-rolled and Coated Steel Sheet for Hot-stamping, Hot-stamped Coated Steel Part and Methods for Manufacturing the Same
16 Jul 20
A method for manufacturing a hot-rolled and coated steel sheet having a thickness between 1.8 mm and 5 mm.
Thomas HENRION, Ronan JACOLOT, Martin BEAUVAIS
Filed: 23 Nov 17
APP
Utility
Metal sheet treatment method and metal sheet treated with this method
9 Jul 20
A steel substrate coated on at least one of its faces with a metallic coating based on zinc or its alloys wherein the metallic coating is itself coated with a zincsulphate-based layer—includes at least one of the compounds selected from among zincsulphate monohydrate, zincsulphate tetrahydrate and zincsulphate heptahydrate, wherein the zincsulphate-based layer has neither zinc hydroxysulphate nor free water molecules nor free hydroxyl groups, the surface density of sulphur in the zincsulphate-based layer being greater than or equal to 0.5 mg/m2.
Lydia RACHIELE, Frida GILBERT, Christophe KLAM, Akshay BANSAL
Filed: 14 Sep 18
GRANT
Utility
High strength steel and production method
30 Jun 20
The present invention provides a cold-rolled and annealed steel sheet of thickness between 0.7 mm and 2 mm, mechanical strength ranging from 1180 MPa to 1320 MPa, wherein the hole expansion ratio Ac % is greater than 20% and the bending angle is greater than or equal to 40°.
Josee Drillet, Veronique Hebert
Filed: 9 Jun 16
APP
Utility
Fabrication Method for a Multi-layer Substrate
25 Jun 20
A method for fabricating a substrate provided with a plurality of layers, includes: providing a steel substrate with an oxide layer including metal oxides on the steel substrate; providing a metal coating layer directly on the oxide layer, the metal coating layer including: at least 8% by weight nickel; at least 10% by weight chromium; and a remainder being iron and impurities from a fabrication process; and providing an anti-corrosion coating layer directly on the metal coating layer.
Daniel Chaleix, Eric Silberberg, Bruno Schmitz, Xavier Vanden Eynde, Sergio Pace
Filed: 5 Mar 20
APP
Utility
Method And Stirring System For Controlling An Electromagnetic Stirrer
18 Jun 20
A method of controlling an electromagnetic stirrer arranged around a submerged entry nozzle (SEN) of a tundish provided with a stopper rod to control throughput of the tundish, the SEN being configured to provide tapping of molten metal from the tundish and the electromagnetic stirrer being configured to generate a rotating magnetic field in the SEN, wherein the method includes controlling the electromagnetic stirrer to operate only when a gas flow rate through the stopper rod is in a first range of 1.5 NL/min to 20 NL/min.
Bengt Rydholm, Fredrik Sandberg, Hongliang Yang, Jan-Erik Eriksson, Jean-Marie Galpin, Bruno Langlet, Jean-Luc Curé, Nicolas Triolet, Thierry Lecoester
Filed: 23 Jan 18
APP
Utility
Method for Producing High-strength Steel Parts with Improved Ductility, and Parts Obtained by Said Method
18 Jun 20
Sebastian COBO, Christian ALLELY, Martin BEAUVAIS, Anis AOUAFI, Emmanuel LUCAS
Filed: 30 May 18
APP
Utility
A coated metallic substrate
18 Jun 20
A coated metallic substrate including at least a first coating of aluminum, such first coating having a thickness below 5 μm and being directly topped by a second coating including from 0.5 to 5.9% by weight of magnesium, the balance being zinc.
Daniel CHALEIX, Christian ALLELY, Eric SILBERBERG, Sergio PACE, Lucie GAOUYAT
Filed: 20 Jul 18
APP
Utility
Method for Obtaining a Height of a Material Stacked In a Coke Oven
11 Jun 20
José LOPEZ FRESNO, José Luis GARCIA CIMADEVILLA, Juan José FERNANDEZ LOPEZ
Filed: 9 May 17
APP
Utility
Zinc-coated Steel Sheet with High Resistance Spot Weldability
11 Jun 20
A method for producing a zinc or zinc-alloy coated steel sheet with a tensile strength higher than 900 MPa, for the fabrication of resistance spot welds containing in average not more than two Liquid Metal Embrittlement cracks per weld having a depth of 100 μm or more, with steps of providing a cold-rolled steel sheet, heating cold-rolled steel sheet up to a temperature T1 between 550° C. and Ac1+50° C. in a furnace zone with an atmosphere (A1) containing from 2 to 15% hydrogen by volume, so that the iron is not oxidized, then adding in the furnace atmosphere, water steam or oxygen with an injection flow rate Q higher than (0.07%/h×α), α being equal to 1 if said element is water steam or equal to 0.52 if said element is oxygen, at a temperature T≥T1, so to obtain an atmosphere (A2) with a dew point DP2 between −15° C. and the temperature Te of the iron/iron oxide equilibrium dew point, then heating the sheet from temperature T1 up to a temperature T2 between 720° C. and 1000° C. in a furnace zone under an atmosphere (A2) of nitrogen containing from 2 to 15% hydrogen and more than 0.1% CO by volume, with an oxygen partial pressure higher than 10−21 atm., wherein the duration tD of heating of the sheet from temperature T1 up to the end of soaking at temperature T2 is between 100 and 500s., soaking the sheet at T2, then cooling the sheet at a rate between 10 and 400° C./s, then coating the sheet with zinc or zinc-alloy coating.
Jean-Marc PIPARD, Sebastien CREMEL, Anirban CHAKRABORTY, Damon PANAHI, Olga GIRINA, Hassan GHASSEMI-ARMAKI, Pavan CHALLA VENKATA SURYA, Yacine BENLATRECHE
Filed: 13 Jun 18
APP
Utility
Method for Producing a High Strength Steel Sheet Having High Ductility, Formability and Weldability, and Obtained Steel Sheet
11 Jun 20
A method for producing a high-strength steel sheet having high ductility, formability and weldability includes providing a cold-rolled sheet, with a composition containing: 0.15% ≤C≤0.23%, 1.4% ≤Mn≤2.6%, 0.6% ≤Si≤1.3%, with C+Si/10≤0.30%, 0.4% ≤Al≤1.0%, with Al≥6(C+Mn/10)−2.5%, 0.010% ≤Nb≤0.035%, 0.1% ≤Mo≤0.5%, annealing the sheet at 860° C.-900° C. to obtain a structure consisting of at least 90% austenite and at least 2% intercritical ferrite, quenching to a temperature between Ms-10° C. and Ms-60° C. at a rate Vc higher than 30° C./s, heating to a temperature PT between 410° C. and 470° C. for 60 s to 130 s, hot-dip coating the sheet, and cooling to room temperature.
Pavan C. VENKATASURYA, Anirban CHAKRABORTY, Hassan GHASSEMI-ARMAKI
Filed: 7 May 18
GRANT
Utility
Vehicle underbody structure comprising a reinforcement element between a longitudinal beam and a lowerside sill part
9 Jun 20
A vehicle underbody structure containing a floor panel, at least one longitudinal beam extending in a longitudinal direction of the vehicle under said floor panel and at least one lowerside sill part extending in the longitudinal direction adjacent to the floor panel, and at least one reinforcement element extending in a transversal direction, substantially perpendicular to the longitudinal direction, said reinforcement element made of a press hardened steel part having a tensile strength higher or equal to 1200 MPa and extending under the floor panel and being attached at one of its transversal ends to the longitudinal beam and at the other of its transversal ends to the lowerside sill part is provided.
Ivan Viaux, Florin Arnautu
Filed: 9 Dec 16
GRANT
Utility
Steel sheet provided with a coating providing sacrificial cathodic protection comprising lanthane
9 Jun 20
A steel sheet is provided with a coating providing sacrificial cathodic protection.
Christian Allely, Jacques Petitjean
Filed: 28 May 15
GRANT
Utility
Method of determining a chemical composition of a slag portion
9 Jun 20
A method of determining a chemical composition of a slag portion is provided.
Asier Vicente Rojo, Artzai Picon Ruiz, Sergio Rodriguez Vaamonde
Filed: 11 May 15
GRANT
Utility
Method and device for preparing aluminum-coated steel sheets intended for being welded and then hardened under a press; corresponding welded blank
2 Jun 20
The present invention provides a method for the preparation of steel sheets to be fabricated into a welded steel blank.
Francis Schmit, René Vierstraete, Qingdong Yin, Wolfram Ehling
Filed: 17 Apr 15
GRANT
Utility
Method of producing press-hardened and coated steel parts at a high productivity rate
2 Jun 20
This invention relates to a sheet or pre-coated blank comprising a steel substrate for heat treatment, overlaid on at least a part of at least one of its principal faces, by a pre-coating having, at least one layer of aluminum or aluminum alloy overlaid, on at least a part of the above-mentioned pre-coating, by a polymerized layer having a thickness between 2 and 30 μm composed of a polymer that does not contain silicon, and the nitrogen content of which, is greater than 1% by weight expressed in relation to the above-mentioned layer, wherein the above-mentioned polymerized layer contains carbon pigments in a quantity between 3 and 30% by weight, expressed in relation to said layer.
Michel Sanadres, Christine Dessain
Filed: 13 Feb 15
APP
Utility
Method and Electronic Device for Determining the Temperature of a Metal Strip, Related Control Method, Computer Program, Control Apparatus and Hot Rolling Installation
21 May 20
A method for determining the temperature of a metal strip (1) inside a cooling apparatus (4) of a hot rolling installation is implemented by an electronic device (12).
Ronan JACOLOT, Didier HUIN, Christian MORETTO, Daniele CORSELLO
Filed: 26 Jun 17
GRANT
Utility
Method for the preparation of aluminized steel sheets to be welded and then press hardened
19 May 20
A method for the preparation of steel sheets for fabricating a welded steel blank is provided.
Francis Schmit, Rene Vierstraete, Qingdong Yin, Wolfram Ehling
Filed: 12 Sep 19