A process for producing clean steel products with low nitrogen content, below 35 ppm, in a steelmaking plant comprising a direct reduced iron (DRI) source, which may be a direct reduction plant or a DRI storage facility, an electric arc furnace (EAF), a vacuum degassing system (DS), and a continuous casting system (CC) is disclosed. The process comprises a first stage of melting and refining a metallic iron charge, a second stage of tapping molten steel from the electric arc furnace (EAF) into a ladle, a third stage of exposing molten steel to a pressure below the atmospheric pressure and a fourth stage of casting molten steel to clean steel products. Optionally, the molten steel tapped from the EAF is treated in a ladle furnace (LF) prior to being treated in the degassing system (DS). The metallic iron charge fed to the EAF comprises more than 70% by weight of DRI in the form of pellets or briquettes having a carbon content above 2.5 weight%. Preferably, the metallic iron charge is fed to the EAF at a temperature of 400°C or higher. The low nitrogen level in the steel products made according to the Application is achieved by forming a first foamy slag in said first process stage and is maintained in a foamy state by controlling the feed of fluxes, oxygen, and carbonaceous materials to the EAF and by forming a second slag, after molten steel is tapped from the EAF, having a predetermined composition capable of continuing the desulfurization and providing a thermal and chemical insulation to prevent nitrogen pickup and promote nitrogen removal of molten steel. The process also comprises carrying out one or more of the following actions: (a) controlling the concentration of nitrogen and sulfur in the raw materials at each process stage, (b) promoting nitrogen removal from steel, (c) decreasing the time spent by the molten steel at each process stage and between each and subsequent process stages, and (d) preventing nitrogen pickup by the molten steel all along said process stages. Steel products made according to the Application comprise the following elements expressed in weight%: C ≤ 0.05%, Si ≤ 4.5%, Al ≤ 2.0%; Mn ≤ 2.0%; P ≤ 0.20%; Ni ≤ 0.200%, Cu ≤ 0.200%; N ≤0.0030%, Ni ≤ 0.200%, S ≤ 0.0035%.
A process for producing clean steel products with low nitrogen content, below 35 ppm, in a steelmaking plant comprising a direct reduced iron (DRI) source, which may be a direct reduction plant or a DRI storage facility, an electric arc furnace (EAF), a vacuum degassing system (DS), and a continuous casting system (CC) is disclosed. The process comprises a first stage of melting and refining a metallic iron charge, a second stage of tapping molten steel from the electric arc furnace (EAF) into a ladle, a third stage of exposing molten steel to a pressure below the atmospheric pressure and a fourth stage of casting molten steel to clean steel products. Optionally, the molten steel tapped from the EAF is treated in a ladle furnace (LF) prior to being treated in the degassing system (DS). The metallic iron charge fed to the EAF comprises more than 70% by weight of DRI in the form of pellets or briquettes having a carbon content above 2.5 weight %. Preferably, the metallic iron charge is fed to the EAF at a temperature of 400° C. or higher. The low nitrogen level in the steel products made according to the Application is achieved by forming a first foamy slag in said first process stage and is maintained in a foamy state by controlling the feed of fluxes, oxygen, and carbonaceous materials to the EAF and by forming a second slag, after molten steel is tapped from the EAF, having a predetermined composition capable of continuing the desulfurization and providing a thermal and chemical insulation to prevent nitrogen pickup and promote nitrogen removal of molten steel. The process also comprises carrying out one or more of the following actions: (a) controlling the concentration of nitrogen and sulfur in the raw materials at each process stage, (b) promoting nitrogen removal from steel, (c) decreasing the time spent by the molten steel at each process stage and between each and subsequent process stages, and (d) preventing nitrogen pickup by the molten steel all along said process stages. Steel products made according to the Application comprise the following elements expressed in weight %: C≤0.05%, Si≤4.5%, Al≤2.0%; Mn≤2.0%; P≤0.20%; Ni≤0.200%, Cu≤0.200%; N≤0.0030%, Ni≤0.200%, S≤0.0035%.
A steel battery housing for a vehicle including an internal crash structure attached to two side crash structures. Each crash structure comprises a first plate, a second plate, and a third plate. The crash section of each plate includes a first portion, two secondary portion which extend from the first portion at a first angle, and flange portions which extend from each secondary portion at a second angle.
H01M 50/20 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports
B60L 50/64 - Détails de construction des batteries spécialement adaptées aux véhicules électriques
H01M 50/204 - Bâtis, modules ou blocs de multiples batteries ou de multiples cellules
H01M 50/242 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par les propriétés physiques des boîtiers ou des bâtis, p. ex. dimensions adaptés pour protéger les batteries contre les vibrations, les collisions ou le gonflement
H01M 50/249 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports spécialement adaptés aux aéronefs ou aux véhicules, p. ex. aux automobiles ou aux trains
4.
Steel battery housing and methods of manufacturing thereof
A steel battery housing for a vehicle including an internal crash structure attached to two side crash structures. Each crash structure comprises a first plate, a second plate, and a third plate. The crash section of each plate includes a first portion, two secondary portion which extend from the first portion at a first angle, and flange portions which extend from each secondary portion at a second angle.
H01M 50/128 - Boîtiers primairesFourreaux ou enveloppes caractérisés par le matériau ayant une structure en couches comprenant au moins trois couches dont au moins deux couches de matériaux inorganiques uniquement
INSTITUTO TECNOLOGICO Y DE ESTUDIOS SUPERIORES DE MONTERREY (Mexique)
TERNIUM MEXICO S.A. DE C.V. (Mexique)
Inventeur(s)
Villarreal Treviño, Juan Antonio
Montesinos Castellanos, Alejandro
Leon Cazares, Gustavo
Abrégé
The invention relates to a method and system for the chemical treatment of dust from an electric-arc furnace, which is contained in the gases formed in said electric furnace during the steelmaking process, in order to reduce the water solubility of the metal oxides contained in said dust, and thus to reduce the environmental problems due to the toxicity of same. The method includes extracting the high-temperature gases that contain the dust from said furnace in addition to carbon dioxide; placing the gases that contain dust in contact with a first stream of water in a first contact container in order to draw the dust from the gases into said stream of water; extracting the stream of water that carries said dust and feeding same into a second container such as to form a mixture of said powders with water having a controlled alkalinity of 7.5 to 8.5; extracting from said second container a stream of the mixture of dust and water formed by said first stream of water, and feeding said mixture of water and dust into said first container in order to place in contact and promote the reaction between the dust contained in said stream of water and the carbon dioxide contained in the gases extracted from the electric furnace.
A method for casting medium carbon, B/Ti steel product using compact strip processing or thin slab casting. The method can include providing a steel composition including boron and titanium and casting the steel composition into a slab having a thickness between about 25 and 150 mm. The slab can have a cast composition including about 0.23 to 0.30 wt. % carbon, about 0.0010 to 0.0050 wt. % boron, about 0.010 to 0.050 wt. % titanium, about 1.15 to 1.50 wt. % manganese, less than 0.35 wt. % silicon and a Ti/N ratio greater than 2.9. The amount of each element is provided based upon the total weight of the steel composition. The steel slab can be free from cracks and significant defects. Furthermore, the steel slab can be used for electric resistance welded (ERW) products.
C21D 8/10 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de corps tubulaires
Building materials of metal, namely, building panels, roofing, roofing tiles, decking, ceiling panels, floor tiles, door and window frames and casings, boards for flooring, girders and joists; metal load bearing constructions, namely, framework for buildings, reinforcing materials for buildings, building boards, building panels, building linings, and building wall cladding; steel, unwrought and partly wrought common metals and their alloys and steel in the form of strips, hoops, coils, sheets, tubes and plates; rolled steel sheets, coated steel sheets, aluminized steel sheets, and galvanized steel sheets
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
19 - Matériaux de construction non métalliques
Produits et services
Metal building materials; building panels of metal; transportable buildings of metal; excluding ironmongery, small items of metal hardware, metallic windows and non metallic windows. Plastics in extruded form for use in manufacture, in particular in the form of panels, sheets, plates and bars; insulators; thermal and acoustic insulating materials. Building materials (non-metallic); non-metallic rigid pipes for building, asphalt; pitch; bitumen, non-metallic transportable buildings; monuments, not of metal; ladders, not of metal, in particular fibreglass ladders; excluding non metallic windows.
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
19 - Matériaux de construction non métalliques
Produits et services
Metal building materials; building panels of metal; transportable buildings of metal; ironmongery, small items of metal hardware. Plastics in extruded form for use in manufacture, in particular in the form of panels, sheets, plates and bars; insulators; thermal and acoustic insulating materials. Building materials (non-metallic); rigid pipes, not of metal, for building; asphalt; pitch; bitumen, transportable buildings, not of metal; monuments, not of metal; ladders, not of metal, in particular fibre glass ladders.
17 - Produits en caoutchouc ou en matières plastiques; matières à calfeutrer et à isoler
19 - Matériaux de construction non métalliques
Produits et services
Metal building materials; building panels of metal; transportable buildings of metal; ironmongery, small items of metal hardware; but not including metallic windows. Plastics in extruded form for use in manufacture, in particular in the form of panels, sheets, plates and bars; insulators; thermal and acoustic insulating materials. Building materials (non-metallic); rigid pipes, not ot metal, for building, asphalt; pitch; bitumen, transportable buildings, not of metal; monuments, not of metal; ladders, not of metal, in particular fibre glass ladders; but not including non-metallic windows.
B60L 50/64 - Détails de construction des batteries spécialement adaptées aux véhicules électriques
H01M 50/20 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports
H01M 50/204 - Bâtis, modules ou blocs de multiples batteries ou de multiples cellules
H01M 50/242 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports caractérisés par les propriétés physiques des boîtiers ou des bâtis, p. ex. dimensions adaptés pour protéger les batteries contre les vibrations, les collisions ou le gonflement
H01M 50/249 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports spécialement adaptés aux aéronefs ou aux véhicules, p. ex. aux automobiles ou aux trains
15.
COMPACT STRIP OR THIN SLAB PROCESSING OF BORON/TITANIUM STEELS
A method for casting medium carbon, B/Ti steel product using compact strip processing or thin slab casting. The method can include providing a steel composition including boron and titanium and casting the steel composition into a slab having a thickness between about 25 and 150 mm. The slab can have a cast composition including about 0.23 to 0.30 wt. % carbon, about 0.0010 to 0.0050 wt. % boron, about 0.010 to 0.050 wt. % titanium, about 1.15 to 1.50 wt. % manganese, less than 0.35 wt. % silicon and a Ti/N ratio greater than 2.9. The amount of each element is provided based upon the total weight of the steel composition. The steel slab can be free from cracks and significant defects. Furthermore, the steel slab can be used for electric resistance welded (ERW) products.
B22D 15/00 - Coulée utilisant un moule ou un noyau dont une partie importante, pour le procédé, est de conductibilité thermique élevée, p. ex. coulée contre refroidisseursMoules ou accessoires spécialement adaptés à cette technique
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/14 - Alliages ferreux, p. ex. aciers alliés contenant du titane ou du zirconium
