46 patents
Utility
Method of continuous manufacturing of solidified steelmaking slag and associated device
22 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: 27 Sep 17
Utility
Hot-rolled and Coated Steel Sheet for Hot-stamping, Hot-stamped Coated Steel Part and Methods for Manufacturing the Same
15 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: 22 Nov 17
Utility
Method for Producing a High Strength Coated Steel Sheet having Improved Strength, Formability and Obtained Sheet
15 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: 22 Mar 20
Utility
Metal sheet treatment method and metal sheet treated with this method
8 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: 13 Sep 18
Utility
Fabrication Method for a Multi-layer Substrate
24 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: 4 Mar 20
Utility
Method And Stirring System For Controlling An Electromagnetic Stirrer
17 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: 22 Jan 18
Utility
Method for Producing High-strength Steel Parts with Improved Ductility, and Parts Obtained by Said Method
17 Jun 20
Sebastian COBO, Christian ALLELY, Martin BEAUVAIS, Anis AOUAFI, Emmanuel LUCAS
Filed: 29 May 18
Utility
A coated metallic substrate
17 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: 19 Jul 18
Utility
Method for Obtaining a Height of a Material Stacked In a Coke Oven
10 Jun 20
José LOPEZ FRESNO, José Luis GARCIA CIMADEVILLA, Juan José FERNANDEZ LOPEZ
Filed: 8 May 17
Utility
Method for Producing a High Strength Steel Sheet Having High Ductility, Formability and Weldability, and Obtained Steel Sheet
10 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: 6 May 18
Utility
Zinc-coated Steel Sheet with High Resistance Spot Weldability
10 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: 12 Jun 18
Utility
Method and Electronic Device for Determining the Temperature of a Metal Strip, Related Control Method, Computer Program, Control Apparatus and Hot Rolling Installation
20 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: 25 Jun 17
Utility
Steel Sheet for Manufacturing Press Hardened Parts, Press Hardened Part Having a Combination of High Strength and Crash Ductility, and Manufacturing Methods Thereof
13 May 20
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<4.2%, 0.001%≤Si%≤1.5%, 0.020%≤Al≤0.9%, 0.001%≤Cr≤1%, 0.001%≤Mo≤0.3%, 0.001%≤Ti≤0.040%, 0.0003%≤B≤0.004%, 0.001%≤Nb≤0.060%, 0.001%≤N≤0.009%, 0.0005%≤S≤0.003%, 0.001%≤P≤0.020%.
Martin BEAUVAIS, Alice DUMONT, Alexandre GIBOT, Astrid PERLADE, Kangying ZHU
Filed: 31 May 18
Utility
Martensitic Steels with 1700 to 2200 Mpa Tensile Strength
6 May 20
A martensitic steel alloy is provided.
Rongjie Song, Narayan S. Pottore
Filed: 12 Sep 19
Utility
a Coated Metallic Substrate and Fabrication Method
6 May 20
A coated metallic substrate is provided, including, at least; one layer of oxides, such layer being directly topped by an intermediate coating layer comprising Fe, Ni, Cr and Ti wherein the amount of Ti is above or equal to 5 wt. % and wherein the following equation is satisfied: 8 wt. %<Cr+Ti<40 wt. %, the balance being Fe and Ni, such intermediate coating layer being directly topped by a coating layer being an anticorrosion metallic coating.
Jacek GONIAKOWSKI, Thi Ha Linh LE, Claudine NOGUERA, Jacques JUPILLE, Remi LAZZARI, Jean-Michel MATAIGNE, Alexey KOLTSOV, Remi CAVALLOTTI, Daniel CHALEIX, Lucie GAOUYAT
Filed: 30 May 18
Utility
High Formability Steel Sheet for the Manufacture of Lightweight Structural Parts and Manufacturing Process
29 Apr 20
A steel sheet has a composition comprising, by weight: 0.010%≤C≤0.080%, 0.06%≤Mn≤3%, Si≤1.5%, 0.005%≤Al≤1.5%, S≤0.030%, P≤0.040%, Ti and B such that: 3.2%≤Ti≤7.5% and (0.45×Ti)−1.35≤B≤(0.45×Ti)−0.43, optionally Ni≤1%, Mo≤1%, Cr≤3%, Nb≤0.1%, V≤0.1%, the remainder being iron and unavoidable impurities resulting from the smelting.
Frédéric BONNET, Manuel BOBADILLA, Bertrand BELE, Valérie DAESCHLER
Filed: 19 Apr 18
Utility
A method for the manufacturing of liquid metal embrittlement resistant galvannealed steel sheet
22 Apr 20
The present invention relates to a method for the manufacture of a galvannealed steel sheet including the steps of A.) coating of the steel sheet with a first coating consisting of nickel and having a thickness between 150 nm and 650 nm, the steel sheet having the following composition in weight percentage 0.10<C<0.40%, 1.5<Mn<3.0%, 0.7<Si<3.0%, 0.05<Al<1.0%, 0.75<(Si+Al)<3.0%, and on a purely optional basis, one or more elements such as Nb≤0.5%, B≤0.010%, Cr≤1.0%, Mo≤0.50%, Ni≤1.0%, Ti≤0.5%., the remainder of the composition is made up of iron and inevitable impurities resulting from the elaboration, B.) annealing of the coated steel sheet being annealed at a temperature between 600 to 1200° C., C.) coating of the steel sheet obtained in step B.) with a second coating based on zinc and D.) an alloying heat treatment to form a galvannealed steel sheet.
Christian Allely, Pascal Bertho, Anirban Chakraborty, Hassan Ghassemi-Armaki
Filed: 24 Apr 18
Utility
Tempered and Coated Steel Sheet Having Excellent Formability and a Method of Manufacturing the Same
25 Mar 20
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%.
Jean-Marc PIPARD, Marc Olivier THENOT
Filed: 18 Dec 17
Utility
Reinforcement Structure for the Back Face of a Vehicle Compartment
18 Mar 20
A reinforcement structure containing: at least one elevation reinforcement profile extending along an elevation direction; at least one transversal reinforcement profile extending along a transversal direction, substantially perpendicular to the elevation direction and at least one compartment panel extending against the elevation reinforcement profile and transversal reinforcement profile; and at least one reinforcement member extending along at least part of the elevation reinforcement profile between the elevation reinforcement profile and the compartment panel, the reinforcement member made of a material having a tensile strength greater than the tensile strength of the material forming the elevation reinforcement profile.
Nicolas SCHNEIDER, Jimmy LAM
Filed: 27 Nov 17
Utility
Operating method of an iron making installation and associated operating installation
18 Mar 20
A method of operating an iron making installation is provided, in which waste material is dried using a drying gas, the drying gas including an exhaust gas from a sinter plant, and the dried material is roasted a roasting gas, so as to produce coal and a roasting exhaust gas.
Joris GEEROMS, Kurt SPELIER, Stefaan VAN DE CASTEELE
Filed: 14 Jun 18