Abrégé

A tundish impact pad, a tundish containing the same, and a method of using and assembly containing the impact pad and tundish are provided. The tundish impact pad features a base having a base surface with a conical impact surface area establishing an apex, a sidewall, and a top wall extending inwardly relative to the sidewall to terminate at an inner edge establishing a mouth opening spaced above and centered relative to the apex. The top wall includes a lip sloping radially inwardly and downwardly towards the conical impact surface.

Classes IPC  ?

• B22D 11/103 - Répartition du métal liquide, p. ex. en utilisant des goulottes, des flotteurs, des distributeurs
• B22D 41/00 - Récipients de maintien d'un bain de fusion, p. ex. poches, paniers de coulée, bassins de coulée ou systèmes analogues

Abrégé

The invention relates to a cold-rolled, annealed and pre-coated steel sheet for the production of press-hardened parts, formed by a steel substrate for thermal treatment, having a carbon content C0 of between 0.07% and 0.5%, said content being expressed by weight, and a metal pre-coating on at least the two main faces of the steel substrate, characterised in that the substrate comprises a decarburised zone on the surface of each of the two main faces, the depth p50% of the decarburised zone being between 6 and 30 micrometres, p50% being the depth at which the carbon content is equal to 50% of the above-mentioned C0 content, as well as being characterised in that the steel sheet does not contain an iron oxide layer between the substrate and the metal pre-coating.

Classes IPC  ?

• B62D 29/00 - Carrosseries caractérisées par le matériau utilisé
• C21D 1/34 - Méthodes de chauffage
• C21D 1/52 - Méthodes de chauffage à la flamme
• C21D 1/673 - Dispositifs pour trempe pour la trempe en coquille
• C21D 1/74 - Procédés de traitement en gaz neutre, en atmosphère contrôlée, sous vide ou dans des matières pulvérulentes
• C21D 1/76 - Réglage de la composition de l'atmosphère
• C21D 3/04 - Décarburation
• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 8/04 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes pour produire des produits plats ou des bandes pour l'emboutissage profond
• C23C 2/02 - Pré-traitement du matériau à revêtir, p. ex. pour le revêtement de parties déterminées de la surface
• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 2/12 - Aluminium ou ses alliages

Abrégé

The invention relates to a steel plate provided with a coating comprising at least one layer of zinc produced by a vacuum deposition coating method using a sonic steam jet wherein the ratio between the pressure inside the zinc ejection chamber Peject and the pressure inside the deposition chamber Pchbre is between 2.10-3 and 5,5.10-2. The invention also relates to the associated production method.

Classes IPC  ?

• C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
• C23C 14/24 - Évaporation sous vide
• C23C 14/56 - Appareillage spécialement adapté au revêtement en continuDispositifs pour maintenir le vide, p. ex. fermeture étanche
• C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et

Abrégé

The invention relates to a steel plate provided with a coating comprising at least a layer of zinc and an upper layer of paint formed by cataphoresis, the zinc layer being formed by a vacuum deposition method using a sonic steam jet in a deposition chamber maintained at a pressure of between 6.10- 2 mbar and 2.10-1 mbar. The invention also relates to the associated production method.

Classes IPC  ?

• C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
• C23C 14/24 - Évaporation sous vide
• C23C 14/56 - Appareillage spécialement adapté au revêtement en continuDispositifs pour maintenir le vide, p. ex. fermeture étanche
• C23C 14/58 - Post-traitement
• C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
• C25D 13/02 - Revêtement électrophorétique caractérisé par le procédé avec des matières inorganiques

Abrégé

The present invention relates to a spot welded joint of at least two steel sheets, wherein at least one of the steel sheets presents yield strength above or equal to 600 MPa, an ultimate tensile strength above or equal to 1000 MPa, uniform elongation above or equal to 15%. The base metal chemical composition comprises 0.05 .ltoreq. C .ltoreq. 0.21 %, 4.0.ltoreq. Mn .ltoreq. 7.0%, 0.5 .ltoreq. Al .ltoreq. 3.5%, Si .ltoreq. 2.0%, Ti .ltoreq. 0.2%, V .ltoreq. 0.2%, Nb .ltoreq. 0.2%, P .ltoreq. 0.025%, B.ltoreq. 0.0035%, and the spot welded joint contains a molten zone microstructure containing more than 0.5 %of Al and containing a surface fraction of segregated areas lower than 1 %, said segregated areas being zones larger than 20.mu.m2 and containing more than the steel nominal phosphorus content.

Classes IPC  ?

• B23K 11/11 - Soudage par points
• B23K 11/16 - Soudage par résistance tenant compte des propriétés du métal à souder
• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium

Abrégé

The invention relates to the manufacture of a cold-rolled steel sheet having a strength of more than 900 MPa, an elastic limit of more than 700 MPa and distributed elongation of more than 12 %, the composition of which includes, the contents being expressed as weight percentages: 0.26 % = C = 0.45 %, 1.0 % = Mn = 3.0 %, 1.0 % = Si = 3.0 %, Al = 0.10 %, 0 % = Cr = 1.5 %, S = 0.005 %, P = 0.020 %, Nb = 0.1 %, Ti = 0.020 %, V = 0.015 %, N = 0.01%, the remainder of the composition being iron and inevitable impurities resulting from the production process. The microstructure, given in surface proportions, comprises 13 % to 25 % residual austenite and 13 % to 30 % MA islands, the remainder consisting of bainite and possibly ferrite.

Classes IPC  ?

• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C23C 2/06 - Zinc ou cadmium ou leurs alliages

Abrégé

The invention relates mainly to a metal sheet comprising a steel substrate coated on at least one of its faces with a coating comprising 0.1 to 20 wt.-% magnesium, optionally 0.1 to 20 wt.-% aluminium, the remainder being zinc, possible impurities linked to the method and optionally one or more additional elements selected from Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Ni, Zr and Bi, the weight concentration of each additional element being less than 0.3 %, the coating itself being covered with a layer comprising zinc hydroxychloride having a chlorine layer weight of at least 1 mg/m2, in which the layer does not comprise: hydrozincite, mixed hydroxycarbonates of zinc and aluminium, or water-soluble compounds of sodium or potassium. The invention also relates to methods for producing the metal sheet of the invention.

Classes IPC  ?

• C23C 2/02 - Pré-traitement du matériau à revêtir, p. ex. pour le revêtement de parties déterminées de la surface
• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 2/26 - Post-traitement
• C23C 14/02 - Pré-traitement du matériau à revêtir
• C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
• C23C 14/58 - Post-traitement
• C23C 22/60 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses alcalines d'un pH > 8
• C23C 22/68 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses avec un pH compris entre 6 et 8
• C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et
• C25D 11/34 - Anodisation de métaux ou d'alliages non prévus dans les groupes

Abrégé

The invention deals with a cold rolled and hot dip coated steel sheet presenting a tensile strength above 1000 - 50xAI MPa, a uniform elongation above 15% and a low density. The steel comprises, by weight percent: 0.1 .ltoreq. C .ltoreq. 0.5%, 3.5 .ltoreq. Mn .ltoreq. 10.0%, 0 .ltoreq. A1 .ltoreq. 9.0%, Si .ltoreq. 5.0%, Ti .ltoreq. 0.2%, V .ltoreq. 0.2%, Nb .ltoreq. 0.2%, S .ltoreq. 0.004 %, P .ltoreq. 0.025 %, 0.5 .ltoreq. Si+AI .ltoreq. 9.0%, B .ltoreq. 0.0035, Cr .ltoreq. 1%, The balance being Fe and impurities and the microstructure containing 25% to 90% of ferrite, 10% to 50 % of austenite, kappa precipitates lower than 5% and martensite lower than 25%. The steel according to the invention presents the ability to be coated using total oxidation.

Classes IPC  ?

• B32B 15/18 - Produits stratifiés composés essentiellement de métal comportant du fer ou de l'acier
• C21D 8/04 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes pour produire des produits plats ou des bandes pour l'emboutissage profond
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C21D 9/48 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles tôles embouties
• C23C 2/02 - Pré-traitement du matériau à revêtir, p. ex. pour le revêtement de parties déterminées de la surface
• C23C 2/06 - Zinc ou cadmium ou leurs alliages

Abrégé

A track shoe for a track drive system, which comprises a shoe base, one or more drive lugs attached to the shoe base, and a wear plate attached to the shoe base. The shoe base and drive lugs may be formed from a prehardened engineering steel, such as MECASTEEL 145. The wear plate may be formed from MECASTEEL 145 or an advanced abrasion-resistant steel, such as Creusabro 8000. The drive lugs may be replaceably attached to the shoe base, preferably by welding. The wear plate may be replaceably attached to the shoe base, preferably by fasteners such as bolts.

Classes IPC  ?

• B62D 55/26 - Éléments ou maillons en contact avec le sol

Abrégé

The invention relates to a plasma source (1) for depositing a coating onto a substrate (9), which is connectable to a power source (P) and includes: an electrode (2); a magnetic assembly (4) located circumferentially relative to said electrode and including a set of magnets mutually connected by a magnetic bracket (46) including a first and second central magnet (43, 44) and at least one head magnet (45); and an electrically insulating enclosure (5) arranged such as to surround the electrode and the magnets.

Classes IPC  ?

• H01J 37/32 - Tubes à décharge en atmosphère gazeuse
• H05H 1/46 - Production du plasma utilisant des champs électromagnétiques appliqués, p. ex. de l'énergie à haute fréquence ou sous forme de micro-ondes

Abrégé

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.

Classes IPC  ?

• G01N 27/82 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant des variables magnétiques pour rechercher la présence des criques

Abrégé

A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C 0.79 - 1.00%; Mn 0.40 - 1.00; Si 0.30 - 1.00; Cr 0.20 - 1.00; V 0.05 - 0.35; Ti 0.01 - 0.035; N 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800 °C at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800 °C), (40 s, 700 °C), and (140 s, 600 °C) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700 °C), (40 s, 600 °C), and (140 s, 500 °C).

Classes IPC  ?

• C21D 1/667 - Dispositifs pour trempe pour la trempe par pulvérisation
• C21D 9/04 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour rails

Abrégé

The present invention is directed at a method of production grain oriented Fe-Si steel sheet presenting an induction value at 800 A/m above 1.870 Tesla and a core power loss lower than 1.3 W/kg at a specific magnetic induction of 1.7 Tesla (T). The steel chemical composition comprises, in weight percentage: 2.8 .ltoreq. Si .ltoreq. 4, 0.20 .ltoreq. Cu .ltoreq. 0.6, 0.05 .ltoreq. Mn .ltoreq. 0.4, 0.001 .ltoreq. A1 .ltoreq. 0.04, 0.025 .ltoreq. C .ltoreq. 0.05, 0.005 .ltoreq. N .ltoreq. 0.02, 0.005 .ltoreq. Sn .ltoreq. 0.03, S .ltoreq. 0.015 and optionally Ti, Nb, V or B in a cumulated amount below 0.02, the following relationships being respected : Mn/Sn .ltoreq. 40, 2.0 .ltoreq. C/N .ltoreq. 5.0, A1/N .gtoreq. 1.20, and the balance being Fe and other inevitable impurities.

Classes IPC  ?

• C21D 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
• C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/16 - Alliages ferreux, p. ex. aciers alliés contenant du cuivre

Abrégé

A method and a tool (10) for forming a seal in a lock chamber (3) of a sheet pile are proposed. The method comprises the steps of: introducing a seal forming tool (10) into the lock chamber (3); injecting a sealing material into a distribution chamber (50) of the tool (10) from where it axially fills longitudinally extending recesses (38', 38", 38') in a seal-shaping module (12); and moving the tool (10) longitudinally through the lock chamber (3), whereby the sealing material is shaped by the seal-shaping module (12). The distribution chamber (50) is a closed chamber inside the tool (10) and. spaced from the longitudinally extending recesses (38', 38", 38"); and the tool (10) comprises moreover at least two distribution channels (52', 52", 52") connecting in parallel the distribution chamber (50) to the recesses (38', 38", 38'), the parallel distribution channels (52', 52", 52") being fine-tuned for apportioning the flow of sealing material between the recesses (38', 38", 38').

Classes IPC  ?

• E02D 5/06 - Pieux particuliers ou autres éléments spécialement destinés à l'obturation des vides entre deux palplanches ou deux rideaux de palplanches

Abrégé

The invention relates to a sheet of rolled steel having mechanical strength no lower than 600 MPa and elongation at break no lower than 20 % as well as to the method for manufacturing same. The chemical composition of the sheet of the invention includes: 0.10 % = C = 0.30 %, 6.0 % = Mn = 15.0 %, 6.0 % = Al = 15.0 %, and optionally one or more elements selected among: Si = 2.0 %, Ti = 0.2 %, V = 0.6 % and Nb = 0.3 %, the rest of the composition comprising iron and inevitable impurities that result from the production process. The weight ratio of manganese to aluminium is such that: Mn / Al > 1.0. The microstructure of the sheet according to the invention consists of ferrite, austenite and up to 5 % of kappa precipitates as a surface fraction.

Classes IPC  ?

• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium

Abrégé

The method comprises the following steps: providing a steel substrate (3) having two faces (5) that are coated by quenching the substrate (3) in a bath, altering the magnesium hydroxide or magnesium oxide layers formed on the outer surfaces (15) of the metal coatings (7) by applying an acid solution, optionally a conversion solution, having a pH of between 1 and 2 and/or mechanical stress, and painting the outer surfaces (15) of the metal coatings (7).

Classes IPC  ?

• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 2/26 - Post-traitement
• C23C 22/06 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses acides d'un pH < 6

Abrégé

The method comprises at least the following steps: providing a steel substrate (3) having two faces (5) that are coated by quenching the substrate (3) in a bath, applying an acid solution having a pH of between 1 and 4 to the outer surfaces (15) of the metal coatings (7); and applying an adhesive (13) locally on at least one outer surface (15) of a metal coating (7).

Classes IPC  ?

• B32B 15/08 - Produits stratifiés composés essentiellement de métal comprenant un métal comme seul composant ou comme composant principal d'une couche adjacente à une autre couche d'une substance spécifique de résine synthétique
• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 2/26 - Post-traitement
• C23C 22/06 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses acides d'un pH < 6

Abrégé

The method comprises at least the following steps: providing a steel substrate (3) having two faces (5), depositing a metal coating (7) on each face (5) by quenching the substrate (3) in a bath, cooling the metal coatings (7), altering the magnesium hydroxide or magnesium oxide layers formed on the outer surfaces (15) of the metal coatings (7), and depositing a layer of oil on the outer surfaces (15) of the metal coatings (7).

Classes IPC  ?

• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 2/26 - Post-traitement
• C23C 22/06 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses acides d'un pH < 6

Abrégé

The invention relates to a steel sheet provided with a coating offering sacrificial cathodic protection, comprising between 5 and 50 wt.-% zinc, between 0.1 and 15 wt.-% silicon, and optionally up to 10 wt.-% magnesium and up to 0.3 w.t-%, in terms of cumulative content, of additional elements, as well as comprising a protective element selected from between 0.1 and 5 wt.-% tin, between 0.01 and 0.5 wt.-% indium and combinations of same, the remainder consisting of aluminium and residual elements or inevitable impurities. The invention also relates to a method for producing parts by means of hot or cold pressing and to the resulting parts.

Classes IPC  ?

• C21D 1/673 - Dispositifs pour trempe pour la trempe en coquille
• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C23C 2/04 - Procédés de trempage à chaud ou d'immersion pour appliquer le matériau de revêtement à l'état fondu sans modifier la forme de l'objet immergéAppareils à cet effet caractérisé par le matériau de revêtement
• C23C 2/12 - Aluminium ou ses alliages
• C23C 2/28 - Post-traitement thermique, p. ex. par traitement dans un bain d'huile

Abrégé

A bubble pump having an interior formed from a material that is resistant attack by molten aluminum. The interior surface may be formed from a ceramic. The ceramic may be selected from the group consisting of alumina, magnesia, silicate, silicon carbide, or graphite, and the mixtures. The ceramic may be a carbon-free, 85% Al2O3 phosphate bonded castable refractory.

Classes IPC  ?

• C22B 9/05 - Affinage par traitement avec des gaz, p. ex. par décrassage par un gaz
• C23C 2/00 - Procédés de trempage à chaud ou d'immersion pour appliquer le matériau de revêtement à l'état fondu sans modifier la forme de l'objet immergéAppareils à cet effet
• F27D 3/14 - Chargement ou déchargement d'un matériau liquide ou fondu

Abrégé

A simplified tool is provided for simultaneous prediction of dent resistance and snap-through buckling resistance of roof panels (12,30) including the effect of roof bow placement, curvatures (R1,R2) of the roof panel (12,30), thickness of the roof (12,30), and steel grade. In one embodiment, a method of predicting snap-through buckling resistance of a sheet metal panel (12) to an applied load (26) under localized loading conditions is provided, wherein the sheet panel (12) has certain defined geometries. The method includes the steps of: identifying first and second principal radii of curvature (R1,R2) of the panel (12); identifying a thickness (t) of the panel (12); identifying the distance (L2) of a portion of the panel between structural supports (32); creating a mathematical function to determine load deflection behavior for snap-through buckling; and determining the likelihood of the panel (12) to display snap-through buckling characteristics under various localized applied loads (26) by inputting the parameters.

Classes IPC  ?

• G06F 30/23 - Optimisation, vérification ou simulation de l’objet conçu utilisant les méthodes des éléments finis [MEF] ou les méthodes à différences finies [MDF]

Abrégé

The present invention relates to a continuous casting equipment for a flow of liquid metal from a tundish (1) into a mould (9), said equipment comprising: a vertical duct disposed upstream of the mould (9) with respect to the direction of travel of the liquid metal; said duct comprising from upstream to downstream a refractory ring (5), a copper tube (3) with an internal diameter D and a submerged entry nozzle (8), a dome (2) disposed inside the refractory ring (5) and comprising a sloped upper part (16), said upper part (16) being defined so as to deflect the liquid metal coming from the tundish (1) towards the inner walls of the vertical duct; characterized in that the diameter D of the copper tube (3) ranges between a minimum diameter equals to Q/3.75 and a maximum diameter equals to Q/1.25, where Q is the nominal liquid metal flow rate of the equipment and is comprised between 200 and 800 kg/min and D the diameter expressed in mm.

Classes IPC  ?

• B22D 11/112 - Traitement du métal liquide par refroidissement accéléré
• B22D 41/60 - Buses de coulée avec des moyens de chauffage ou de refroidissement

Abrégé

The present invention relates to a continuous casting process of a steel semi-product comprising:- a step of casting using a hollow jet nozzle located between a tundish and a continuous casting mould, said nozzle comprising, in its upper part, a dome for deflecting the liquid metal arriving at the inlet of said nozzle towards the internal wall of the nozzle, thus defining an internal volume with no liquid metal,- a simultaneous step of injection of powder through a hole of the dome, said powder having a particle size inferior to 200 pm and said dome comprising first means to inject said powder without any contact with said dome, said first means comprising a hollow body, and second means to reduce the surface temperature of the inner wall of said hollow body.

Classes IPC  ?

• B22D 11/108 - Alimentation en additifs, poudres ou similaires
• B22D 41/58 - Buses de coulée avec des moyens d'injection de gaz

Abrégé

The present invention relates to a continuous casting process of a steel semi-product comprising:- a step of casting using a hollow jet nozzle located between a tundish and a continuous casting mould, said nozzle comprising, in its upper part, a dome for deflecting a liquid metal arriving at an inlet of said nozzle towards an internal wall of the nozzle, thus defining an internal volume with no liquid metal,- a simultaneous step of injection of powder through a hole of the dome, said powder having a particle size inferior to 200 .mu.m and said dome comprising first means to inject said powder without any contact with said dome, said first means comprising a hollow body, and second means to avoid sticking or sintering of said powder onto said first means.

Classes IPC  ?

• B22D 11/04 - Coulée continue des métaux, c.-à-d. en longueur indéfinie dans des moules sans fond
• B22D 11/106 - Protection de l'écoulement du métal fondu
• B22D 11/108 - Alimentation en additifs, poudres ou similaires

Abrégé

A high temperature oxidation resistant nickel-aluminide alloy compostion and furnace rolls formed therefrom. The inventive nickel-aluminide alloy composition comprises 0.08 - 0.1 wt.% Zr, 2.5 - 3.0 wt.% Mo, 7.5 - 8.5 wt.% Al, 7.5 - 8.5 wt.% Cr, about 0.01 wt.% B and the balance being substantially nickel.

Classes IPC  ?

• C22C 19/03 - Alliages à base de nickel ou de cobalt, seuls ou ensemble à base de nickel
• C22C 30/00 - Alliages contenant moins de 50% en poids de chaque constituant
• F27D 3/02 - Patins ou voies pour charges lourdes

Abrégé

The invention relates mainly to the use of an aqueous treatment solution containing sulphate ions SO4 2- at a concentration of greater than or equal to 0.01 mol/l, for treating a metal sheet comprising a steel substrate coated on at least one of its faces with a coating comprising at least zinc and magnesium, in order to reduce the blackening or tarnishing of the metal sheet during the storage thereof. The invention also relates to the metal sheet treated with such a solution.

Classes IPC  ?

• C23C 22/53 - Traitement du zinc ou des alliages à base de zinc
• C23C 22/68 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses avec un pH compris entre 6 et 8
• C25D 5/48 - Post-traitement des surfaces revêtues de métaux par voie électrolytique
• C25D 11/34 - Anodisation de métaux ou d'alliages non prévus dans les groupes

Abrégé

A process for producing a dual phase steel sheet are described. The process comprising steps of: providing a dual phase hot rolled steel sheet comprising a composition comprising: 0.1 - 0.3 wt.% C; 1.5 - 2.5 wt.% Si; 1.75-2.5 wt.% Mn; 0-1 wt.% Al; 0-0.1 total of one or more of Nb, Ti and V; and 0-0.3wt% Mo; and the remainder being Fe and inevitable residuals; annealing said hot rolled sheet from 750 to 875.degree.C; water quenching said hot rolled sheet from 400 to 420.degree.C; and overaging said sheet from 400 to 420.degree.C to convert the martensite in said hot rolled steel sheet to tempered martensite. The sheet comprising a microstructure containing ferrite and tempered martensite and comprising a tensile strength of at least 980 MPa, a total elongation of at least 15%, and a hole expansion ratio of at least 15%.

Classes IPC  ?

• C21D 1/26 - Méthodes de recuit
• C21D 6/00 - Traitement thermique des alliages ferreux
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse

Abrégé

Martensitic steel alloy compositions and methods of production thereof are described. The compositions exhibit ultimate tensile strengths of at least 1700 MPa and contain between 0.22 and 0.36 wt.% carbon, between 0.5 and 2.0 wt.% manganese, about 0.2; wt.% silicon, and optionally one or more of Nb 0 - 0.029 wt.%, Ti 0 - 0.024 wt.%, B 0 - 0.0018 wt.%, Al 0 - 0.04 wt.%, N 0 - 0.0053 wt.%, S 0 - 0.005 wt.%, P 0 - 0.009 wt.%, and the remainder consisting of iron and unavoidable impurities. The alloys have a carbon equivalent of less than 0.44, using the formula:Ceq = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/151 where Ceq is the carbon equivalent, and C, Mn, Cr, Mo, V, Ni, and Cu are in wt.% of the elements in the alloy.

Classes IPC  ?

• C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse

Abrégé

A method for dip coating a steel strip (16) moving in a liquid bath (9) of metal, such as zinc, or of metal alloy contained in a tank (15), by which the mattes which are formed during the coating and float on the surface (10) of the bath (9) are removed from the surface of the strip (16), by means of at least one inductor (11-15), each inductor (11-15) producing a travelling electromagnetic field oriented in a given direction and generating a magnetomotive force, all of said magnetomotive forces moving said mattes towards a container (19) intended to collect said mattes and/or towards an area (25) of the surface (10) of the bath (9) from where they are discharged, characterised in that, for at least one of said inductors (11-15), said direction of the travelling electromagnetic field thereof is intermittently reversed in such a way as to modify the flows of mattes inside the tank (15). Facility for implementing said method.

Classes IPC  ?

• C23C 2/00 - Procédés de trempage à chaud ou d'immersion pour appliquer le matériau de revêtement à l'état fondu sans modifier la forme de l'objet immergéAppareils à cet effet
• C23C 2/40 - PlaquesBandes

Abrégé

A vehicle door assembly comprises an inner panel (12) in the form of a frame portion. The frame portion (28) comprises opposite front and rear U-shaped side frame members (281, 282) non-detachably attached to each other by upper and lower intermediate frame members (283, 284) so as to form a continuous perimeter. The side frame members are made of a first steel material and the intermediate frame members made of a second steel material, which is different from the first steel material. A method for manufacturing the inner panel comprises providing U-shaped sheets (52F, 52R) of the first steel material, providing top and bottom sheets (54T, 54B) of the second steel material, non-detachably connecting the U-shaped sheets to the top and bottom sheets so as to form a blank, and stamping the blank into the frame portion.

Classes IPC  ?

• B60J 5/04 - Portes disposées sur les côtés du véhicule

Abrégé

The invention relates to a rolled-steel sheet or blank, the composition of which includes, the contents being expressed in wt %: C = 0.1%, 0.5% = Mn = 7%, 0.5% = Si = 3.5%, 0.5% < Ti = 2%, 2% < Ni = 7%, Al = 0.10%, Cr = 2%, Cu = 2%, Co = 2%, Mo = 2%, S =0.005%, P = 0.03%, Nb = 0.1%, V = 0.1%, B < 0.005%, and N = 0.008%, it being assumed that the silicon and titanium contents are such that Si + Ti = 2.5% and that formula (I) is complied with. The remainder of the composition consists of iron and unavoidable impurities resulting from production. The invention also relates to the method for manufacturing a part for land-based motor vehicle from the sheet or blank by means of hot-drawing. The microstructure of the part essentially consists of martensite and intermetallic Fe2TiSi precipitates with an area ratio of between 1% and 5% for the latter.

Classes IPC  ?

• C21D 6/00 - Traitement thermique des alliages ferreux
• C21D 6/02 - Durcissement par précipitation
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/08 - Alliages ferreux, p. ex. aciers alliés contenant du nickel
• C22C 38/14 - Alliages ferreux, p. ex. aciers alliés contenant du titane ou du zirconium

Abrégé

The invention mainly pertains to a piece of welded steel, with very high mechanical strength characteristics, obtained from heating followed by hot forming and then cooling of at least one welded blank obtained by butt welding of at least a first and second sheet, consisting at least in part of a steel substrate and a pre-coating consisting of a coat of intermetallic alloy in contact with the steel substrate, topped by a metal alloy layer of aluminum alloy or aluminum-based alloy. The other piece of welded steel of the invention is essentially characterized by the fact that the edges (36) in direct proximity with the molten zone (35) do not have a metal alloy coat (19, 20) while being provided with an intermetallic alloy coat (17, 18), over at least part of length of the molten zone (35), with the ratio between the carbon content of the molten zone (35) and the carbon content of the substrate (25,26) of either the first or the second sheet (11,12) exhibiting the highest carbon content (Cmax) ranging between 1.27 and 1.59. The invention also pertains to the manufacturing process of such a piece of welded steel and the use of this welded steel piece for the manufacturing of structural or safety parts for vehicles, particularly automobiles.

Classes IPC  ?

• B23K 26/32 - Assemblage tenant compte des propriétés du matériau concerné
• B23K 35/38 - Emploi d'environnements spécifiés, p. ex. d'atmosphères particulières entourant la zone de travail

Abrégé

The invention mainly relates to a welded steel part, with very high mechanical resistance properties, produced by heating, then hot-forming, then cooling at least one welded blank produced by the end-to-end welding of at least one first and one second metal sheet at least partially consisting of a steel substrate and a pre-coating consisting of an intermetallic alloy layer in contact with the steel substrate, on which a metallic alloy layer consisting of aluminium alloy or based on aluminium is mounted. Said welded steel part according to the invention is essentially characterised in that the edges (36) in close proximity to the melted area (35) are not provided with the metallic alloy layer (19, 20) but they are provided with the intermetallic alloy layer (17, 18), and in that, on at least part of the length of the melted area (35), the ratio of the carbon content of the melted area (35) to the carbon content of the substrate (25, 26) of one of the first or second metal sheets (11, 12) having the highest carbon content (Cmax) is between 1.27 and 1.59. The invention also relates to a method for producing such a welded steel part and to the use of said welded acid part for producing structural or safety parts for vehicles, especially motor vehicles.

Classes IPC  ?

• B23K 26/32 - Assemblage tenant compte des propriétés du matériau concerné
• B23K 35/02 - Baguettes, électrodes, matériaux ou environnements utilisés pour le brasage, le soudage ou le découpage caractérisés par des propriétés mécaniques, p. ex. par la forme
• B23K 35/30 - Emploi de matériaux spécifiés pour le soudage ou le brasage dont le principal constituant fond à moins de 1550 C
• B23K 35/38 - Emploi d'environnements spécifiés, p. ex. d'atmosphères particulières entourant la zone de travail
• B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
• B62D 29/00 - Carrosseries caractérisées par le matériau utilisé
• C21D 1/673 - Dispositifs pour trempe pour la trempe en coquille
• C21D 9/48 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles tôles embouties
• C21D 9/50 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour joints de soudure
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome

Abrégé

The invention relates mainly to a panel (1) having a profile comprising:- a first longitudinal edge comprising in succession at least one first longitudinal rib (2), a flange, and a second longitudinal rib (2'), wherein each longitudinal rib comprises an upper central part and two lateral wings,- a central part,- a second longitudinal edge comprising in succession a first lateral portion (7), a protruding part (8), and a second lateral portion (7'), wherein lateral portions (7, 7') have a configuration permitting them to at least partially overlap the upper central parts of longitudinal ribs (2, 2'), where protruding part (8) is capable of receiving a fastener.The invention also relates to associated assembly of panels by marginal overlap, as well as to the associated roofing and kit for fabrication of roofing.

Classes IPC  ?

• E04D 3/30 - Couverture de toit utilisant des plaques planes ou incurvées ou des feuilles rigides à profil en travers particulier, p. ex. avec des ondulations sur les deux faces, avec des nervures, des rebords ou similaires en métal
• E04D 3/365 - AssemblageFixation par simple recouvrement des parties marginales avec emploi d'éléments d'assemblage séparés, p. ex. de crochets ou tire-fonds pour plaques ondulées
• F24S 25/30 - Agencement de montages ou de supports fixes pour des modules de collecteurs de chaleur solaire utilisant des éléments de fixation rigides et allongés s’étendant substantiellement le long de la surface de montage, p. ex. pour couvrir les bâtiments avec des collecteurs de chaleur solaire
• F24S 25/615 - Moyens de fixation, p. ex. moyens d’assemblage, spécialement adaptés pour supporter des modules de collecteurs de chaleur solaire pour ancrer au sol ou à la structure d’un bâtiment pour fixer à des parties de bâtiments en saillie, p. ex. aux ondulations ou aux joints debout
• H02S 20/25 - Éléments de couverture de toit en tuiles

Abrégé

The invention relates to a TRIP steel plate, which is cold-rolled and annealed, which is formable and which has improved weldability, the strength of which is between 780 and 900 MPa, and the elongation at break of which is greater than 19%, wherein the composition thereof includes, the contents being expressed in weight percent: 0.17% = C = 0.25%, 1.5% = Mn = 2%, 0.5% = Si = 1%, and 0.5% = Al = 1.2%, it being understood that Si +Al = 1.30%, the remainder of the composition consisting of iron and unavoidable impurities resulting from the production, the microstructure of the steel plate consisting of 65-85% of iron, 15-35% of islands of residual martensite and austenite, the mean size of said islands of residual martensite and austenite being less than 1.3 micrometers, and the mean form factor thereof being less than 3

Classes IPC  ?

• C21D 1/20 - Trempe isotherme, p. ex. durcissement bainitique
• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
• C22C 38/12 - Alliages ferreux, p. ex. aciers alliés contenant du tungstène, du tantale, du molybdène, du vanadium ou du niobium

Abrégé

The invention relates to a method for the production of a martensitic steel sheet having a yield point greater than 1300 MPa. The method comprises the following steps consisting in: supplying a semi-finished steel product having a composition containing, expressed as weight percent, 0.15% = C = 0.40%, 1.5%= Mn = 3%, 0.005% = Si = 2%, 0.005%= Al = 0.1%, S = 0.05%, P= 0.1%, 0.025%= Nb =0.1% and, optionally, 0.01% = Ti = 0.1%, 0% = Cr = 4%, 0% = Mo = 2%, 0.0005% = B = 0.005%, 0.0005% = Ca = 0.005%, the remainder of the composition being formed by iron and the inevitable impurities resulting from production; heating the semi-finished product to a temperature T1 between 1050°C and 1250°C and, subsequently, subjecting the heated semi-finished product to rough rolling at a temperature T2 between 1050 and 1150°C, with a cumulative reduction rate ea greater than 100%, such as to obtain a sheet having an austenitic structure that is not totally recrystallised, with an average grain size of less than 40 micrometres and preferably less than 5 micrometres; and cooling the sheet, such as to prevent the transformation of the austenite, at a rate VR1 greater than 2°C/s to a temperature T3 between 970°C and Ar3+30°C, and, subsequently, subjecting the cooled sheet to final hot rolling at temperature T3, with a cumulative reduction rate eb greater than 50%, such as to obtain a sheet that is then cooled at a rate VR2 above the critical cooling rate.

Classes IPC  ?

• B62D 29/00 - Carrosseries caractérisées par le matériau utilisé
• C21D 6/00 - Traitement thermique des alliages ferreux
• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/38 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de manganèse

Abrégé

An apparatus and method for imaging the interior of a hot dip melt pot snout of a hot dip steel coating apparatus through the snout thereof. The system provided for high visual contrast and high resolution imaging, without the need for external illumination. The inventive apparatus and method image the interior of the hot dip melt pot snout at infrared wavelengths, and preferably in a wavelength range of 0.7 to 3 microns. The inventive apparatus and method provide valuable information about the condition of the hot dip melt pot snout and steel coating process which may be used to improve the quality of the produced coated steel.

Classes IPC  ?

• C23C 2/40 - PlaquesBandes
• H04N 7/18 - Systèmes de télévision en circuit fermé [CCTV], c.-à-d. systèmes dans lesquels le signal vidéo n'est pas diffusé

Abrégé

The invention relates to a method for the production of a steel sheet having a fully martensitic structure with an average lathe size of less than 1 micrometre, the average elongation factor of the lathes being between 2 and 5, wherein the elongation factor of a lathe of maximum dimension lmax and minimum dimension Imin is defined asImax / Imin, with a yield point greater than 1300 MPa, and mechanical strength greater than (3220(C)+958) megapascals, (C) denoting the carbon weight content of the steel. The method comprises the following steps consisting in: supplying a semi-finished steel product having a composition containing, expressed as weight, 0.15% = C = 0.40%, 1,5% = Mn = 3%, 0.005% = Si = 2%, 0.005% = Al = 0.1 %, 1.8% = Cr = 4%, 0% = Mo = 2%, wherein 2.7% = 0.5 (Mn)+(Cr)+3(Mo) = 5.7%, S = 0.05%, P = 0.1 % and, optionally, 0% = Nb = 0.050%, 0.01 % = Ti = 0.1 %, 0.0005% = B = 0.005%, 0.0005% = Ca = 0.005%, the remainder of the composition being formed by iron and the inevitable impurities resulting from production; heating the semi-finished product to a temperature T1 between 1050°C and 1250°C and, subsequently, subjecting the heated semi-finished product to rough rolling at a temperature T2 between 1000 and 880°C, with a cumulative reduction rate ea greater than 30%, such as to obtain a sheet having an austenitic structure that is totally recrystallised, with an average grain size of less than 40 micrometres and preferably less than 5 micrometres; and partially cooling the sheet, such as to prevent the transformation of the austenite, at a rate VR1 greater than 2°C/s to a temperature T3 between 600°C and 400°C in the metastable austenitic range, and, subsequently, subjecting the not completely cooled sheet to final hot rolling at temperature T3, with a cumulative reduction rate eb greater than 30%, such as to obtain a sheet that is cooled at a rate VR2 above the critical cooling rate.

Classes IPC  ?

• C21D 1/19 - DurcissementTrempe avec ou sans revenu ultérieur par trempe interrompue
• C21D 7/13 - Modification des propriétés physiques du fer ou de l'acier par déformation par travail à chaud
• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome
• C22C 38/22 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du molybdène ou du tungstène

Abrégé

The invention relates to the production of a cold-rolled steel sheet with a strength of more than 1000 MPa, a uniform elongation of more than 12% and a V-pliability of more than 90°, the composition of which comprises the following with the amounts expressed by weight: 0.15% = C < 0.25%, 1.8% = Mn = 3.0%, 1.2% = Si = 2%, 0% < Al = 0.10%, 0% = Cr = 0.50%, 0% = Cu = 1%, 0% = Ni = 1%, 0% = S - 0.005%, 0% = P < 0.020%, Nb = 0.015%, Ti = 0.020%, V = 0.015%, Co = 1%, N = 0.008%, B = 0.001%, with the understanding that Mn+Ni+Cu = 3%, the rest of the composition consisting of iron and inevitable impurities resulting from the production method. By area, the microstructure consists of between 5 and 20% of polygonal ferrite, between 10 and 15% of residual austenite, and between 5 and 15% of martensite, the remainder consisting of laths of bainite comprising carbides between said laths, such that the number N of inter-lath carbides larger than 0.1 micrometres in size per unit area is 50,000 mm-2 or less.

Classes IPC  ?

• C21D 1/20 - Trempe isotherme, p. ex. durcissement bainitique
• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse

Abrégé

The present invention is related to a rolled steel sheet suitable for enamelling, said sheet having a carbon profile, defined by a gradient in the C-level from a level Csurface at least one surface of the sheet, to a level Cbulk in the bulk of the sheet, Cbulk being higher than Csurface, and With I - Cbulk higher than 0 and lower than or equal to 0.08wt%, - CsurfaCe between 0 and 0.015wt%, - A1 between 0.012wt% and 0.07wt%, Mn between 0.12wt% and 0.45wt%, 0 lower than 0.01wt% and optionally : - Cu between 0.025wt% and 0.1wt%, - S between 0.008wt% and 0.04wt%, - Ca between 0.0005wt% and 0.005wt%, the balance being Fe and incidental impurities, and wherein the depth where the C-level reaches (Cbulk+Csurface) 12, is higher than 75µm. The invention is equally related to a method for producing said steel sheet.

Classes IPC  ?

• C21D 3/04 - Décarburation
• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C21D 9/56 - Fours continus pour bandes ou fils métalliques

Abrégé

37Hot rolled steel sheet and associated methodsThe invention relates principally to a hot rolled steel sheet with a yield stress greater than 690 MPa and less than or equal to 840 MPa, with strength between 780 MPa and 950 MPa, elongation at failure greater than 10% and a hole expansion ratio (Ac) greater than or equal to 50%.The chemical composition of the sheet claimed by the invention contains, whereby the contents are expressed in percent by weight: 0.040% .ltoreq.C .ltoreq.0.065%,1.4%.ltoreq. Mn.ltoreq. 1.9%, 0.1%.ltoreq. Si.ltoreq. 0.55%, 0.095%.ltoreq. Ti.ltoreq. 0.145%, 0.025%.ltoreq.0.045%,0.005% .ltoreq.Al.ltoreq. 0.1%, 0.002% .ltoreq.N.ltoreq. 0.007%, S.ltoreq. 0.004%, P < 0.020.The microstructure of the sheet claimed by the invention also consists of granular bainite, ferrite, cementite in an area percentage of less than 1.5% and titanium and niobium carbonitrides, which results in a hole expansion ratio (Ac) greater than or equal to 50%, andthe ratio between the grain size D L measured parallel to the rolling direction and the grain size D N measured perpendicular to the rolling direction is less than or equal to 1.4.The invention also relates to methods for the fabrication of the sheet described above, in particular depending on whether the composition includes chromium or not.

Classes IPC  ?

• B65G 45/10 - Dispositifs de nettoyage
• B65G 45/24 - Dispositifs de nettoyage comportant plusieurs dispositifs de nettoyage différents
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/12 - Alliages ferreux, p. ex. aciers alliés contenant du tungstène, du tantale, du molybdène, du vanadium ou du niobium
• C22C 38/14 - Alliages ferreux, p. ex. aciers alliés contenant du titane ou du zirconium
• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• F27D 15/00 - Manutention ou traitement du matériau déchargéSupports ou chambres pour son entreposage

Abrégé

The present invention relates to a facility for the continuous vacuum deposition of a metal coating on a substrate in motion, comprising a vacuum deposition enclosure (24), at least one vapor jet deposition head (25,26) connected to an evaporator pot (9) designed to contain the coating metal in liquid form (11), through a vapor supply pipe (20) provided with a distribution valve (19), and a melting furnace (1) for said metal, said furnace being at atmospheric pressure, located below the lowest portion of the evaporator pot (9) and connected to the evaporator pot (9) by at least one automatic supply pipe (8) of the evaporator,pot (9) provided with a supply pump (6) and by at least one liquid metal return pipe (8A,18) optionally provided with a valve (16,17), regulating means for the supply pump (6) further being present to regulate a determined liquid metal level in the evaporator pot (9), characterized in that it comprises, in each said supply and return pipes (8; 8A,18), a so-called heat valve area (7,13,15) provided with a heating device and a cooling device to obtain a regulated temperature, independent of that of the melting furnace (1), that prevailing in the remaining portion of said pipes (8,8A,18) and in the evaporator pipe (9), to melt or solidify the metal found in that location.

Classes IPC  ?

• C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
• C23C 14/24 - Évaporation sous vide
• C23C 14/56 - Appareillage spécialement adapté au revêtement en continuDispositifs pour maintenir le vide, p. ex. fermeture étanche

Abrégé

The invention relates to a steel sheet provided with a multilayer coating consisting of at least one zinc-based layer consisting of 0.1% to 20% magnesium by weight, covered by a fine temporary protective layer of 5 to 100 nm and composed of metal or metal oxide selected from the group consisting of aluminum, chromium, aluminum oxides AIO x, with x being strictly between 0.01 and 1.5 and chromium oxides CrO y, with y being strictly between 0.01 and 1.5, with said zinc based layer consisting of 0.1 to 20% magnesium by weight not being alloyed with said temporary protective layer, and manufacturing process for such a sheet and part.

Classes IPC  ?

• B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 14/16 - Matériau métallique, bore ou silicium sur des substrats métalliques, en bore ou en silicium
• C23C 28/00 - Revêtement pour obtenir au moins deux couches superposées, soit par des procédés non prévus dans un seul des groupes principaux , soit par des combinaisons de procédés prévus dans les sous-classes et

Abrégé

The invention relates to a hot-rolled or cold-rolled steel plate, characterised in that the composition thereof is, in weight percent: 0.6 % = C = 0.9 %; 17 % = Mn = 22 %; 0.2 % = Al = 0.9 %; 0.2 % = Si = 1.1 % with 0.85 % = Al + Si = 1.9 %; 1.2 % = Cu = 1.9 %; S = 0.030 %; P = 0.080 %; N = 0.1 %; optionally: Nb = 0.25 %, preferably between 0.070 and 0.25 %; V = 0.5 %, preferably between 0.050 and 0.5 %; Ti = 0.5 %, preferably between 0.040 and 0.5 %; Ni = 2 %; trace elements = Cr = 2 %, preferably = 1 %; B = 0.010 %, preferably between 0.0005 % and 0.010 %; the remainder being iron and impurities resulting from the production. The invention also relates to a method for manufacturing said plate and to the use of said plate in the automotive industry.

Classes IPC  ?

• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse

Abrégé

The invention concerns an austenite-ferrite stainless steel composition, whose composition contains in % by weight :0.01% .ltoreq. C .ltoreq.0.10%20.0% .ltoreq. Cr .ltoreq. 24.0%1.0% .ltoreq. Ni .ltoreq. 3.0%0.12% .ltoreq. N .ltoreq. 0.20%0.5% .ltoreq. Mn .ltoreq. 2.0%1.6% .ltoreq. Cu .ltoreq. 3.0%0.05% .ltoreq. Mo .ltoreq. 1.0%W .ltoreq. 0.15%0.05% .ltoreq. Mo +W/2 .ltoreq. 1.0%0.2% .ltoreq. Si .ltoreq. 1.5%Al .ltoreq. 0.05%V .ltoreq. 0.5%Nb .ltoreq. 0.5 %Ti .ltoreq. 0.5%B .ltoreq. 0.003% Co .ltoreq. 0.5% REM .ltoreq. 0.1% Ca .ltoreq. 0.03 % Mg .ltoreq. 0.1 % Se .ltoreq. 0.005% O .ltoreq. 0.01%S .ltoreq. 0.030%P .ltoreq. 0.040%the rest being iron and impurities resulting from the production and the microstructure being composed of austenite and 35 to 65% ferrite by volume, the composition furthermore obeying the following relations :40 .ltoreq. IF .ltoreq. 65 withIF = 10%Cr + 5.1%Mo + 1.4%Mn + 24.3%Si + 35%Nb + 71.5%Ti - 595.4%C - 245.1%N - 9.3%Ni - 3.3%Cu - 99.8and IRCGCU .gtoreq. 32.0 withIRCGCU = %Cr+ 3.3%Mo + 2%Cu +16%N + 2.6%Ni - 0.7%Mnand 0 .ltoreq. IU .ltoreq. 6.0 withIU = 3%Ni + %Cu + %Mn -100%C -25%N - 2(%Cr + %Si) -6%Mo +45 as well as a method of manufacture of plates, bands, coils, bars, wires, profiles, forged pieces and molded pieces of this steel.

Classes IPC  ?

• C21D 7/13 - Modification des propriétés physiques du fer ou de l'acier par déformation par travail à chaud
• C21D 8/00 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
• C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
• C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse

Abrégé

Presented are an insulation brick and the method of using an insulation brick to create a thermal lining. A set of corrugations are formed into a sidewall of the brick to increase the thermal insulation. A first end of the insulation brick has a convex portion while the second end of the insulation brick has a concave portion. This allows a first insulation brick to mate with another brick in an end to end configuration.

Classes IPC  ?

• B22D 41/02 - Garnissage
• C21B 9/06 - Garnissage
• F27D 1/04 - CarcassesGarnissagesParoisVoûtes caractérisés par la forme des briques ou des blocs utilisés

Abrégé

The present invention is related to a steel product of the weathering steel type, i.e. a product exhibiting increased corrosion resistance after having been exposed to the outside environment for a given time. According to the invention, the steel product is defined by a composition consisting of (in wt%) : - Carbon between 0.03 and 0.2, - Manganese between 0.5 and 2, - Copper between 0 and 0.5, - Ti between 0 and 0.1, - Cr between 0 and 0.5, - Nickel between 0 and 0.2, - Niobium between 0 and 0.1, - Nitrogen between 0 and 0.01, - Sulphur between 0 and 0.01, Phosphor between 0 and 0.01, - Aluminium higher than 0 and maximum 1.5, - Silicon between 0.25 and 1.5, the balance being Fe and accidental impurities, and wherein the sum of the Al and Si levels is higher than about 0.85wt%.

Classes IPC  ?

• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
• C22C 38/42 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du cuivre
• C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
• C22C 38/50 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du titane ou du zirconium
• C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse

Abrégé

Presented is a method and apparatus for treating an exhaust gas. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. In an exemplary embodiment, a cyclone filter, a ceramic filter, a baghouse filter, and a pair of gas conditioners are used to initially separate and extract iron-rich dust from an exhaust gas and then extract zinc from the gas.

Classes IPC  ?

• B01D 46/24 - Séparateurs de particules utilisant des corps filtrants creux et rigides, p. ex. appareils de précipitation de poussières
• B01D 51/10 - Conditionnement du gaz à épurer
• B01D 53/00 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols
• B01D 53/46 - Élimination des composants de structure définie
• B01D 53/75 - Procédés multi-étapes
• C21C 5/38 - Élimination des gaz résiduaires ou des poussières
• C22B 7/02 - Mise en œuvre des cendres folles
• C22B 19/18 - CondenseursRecettes

Abrégé

A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt% carbon, 0.40-0.75 wt% manganese, 0.40-1.00 wt% silicon, 0.05-0.15 wt% vanadium, 0.015-0.030 wt% titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775°C), (20 s, 670?C), and (110 s, 550°C) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750°C), (20 s, 610°C), and (110 s, 500°C).

Classes IPC  ?

• C21D 9/04 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour rails
• C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C22C 38/12 - Alliages ferreux, p. ex. aciers alliés contenant du tungstène, du tantale, du molybdène, du vanadium ou du niobium
• C22C 38/14 - Alliages ferreux, p. ex. aciers alliés contenant du titane ou du zirconium

Abrégé

The present disclosure relates mainly to a method for reducing the carbon dioxide emissions of a blast furnace, in which reducing agents are charged into the throat and auxiliary fuels in pulverized form are injected into the tuyeres, and which is essentially characterized in that the reducing agents charged into the throat comprise charcoal. According to a preferred aspect of the disclosure, the specific consumption of charcoal charged into the throat is more than 0% and less than 20% of the total quantity of reducing agents charged into the throat. By proceeding in this matter, a significant reduction in carbon dioxide emissions is obtained, and also substantial beneficiation of the charcoal relative to the reduction in carbon dioxide emissions. The present disclosure also relates to a device for implementing this method.

Classes IPC  ?

• C21B 5/00 - Fabrication de la fonte brute dans les hauts fourneaux

Abrégé

Methods and systems for resistance spot welding using direct current micro pulses are described. One described method comprises comprising forming a weld joint by applying a plurality of direct current micro pulses to at least two pieces of materials through a first electrode and a second electrode.

Classes IPC  ?

• B23K 11/11 - Soudage par points
• B23K 11/24 - Circuits d'alimentation ou de commande appropriés

Abrégé

A hot rolled plate or forging of an austenitic steel not susceptible to relaxation cracking, with composition comprising, in percentages by weight : 0.019%.ltoreq. C .ltoreq.0.030%, 0.5%.ltoreq. Mn .ltoreq.2%, 0.1%.ltoreq.Si .ltoreq.0.75%, Al .ltoreq.0.25%, 18%.ltoreq. Cr .ltoreq.25%, 12%.ltoreq. Ni .ltoreq.20%, 1.5%.ltoreq. Mo .ltoreq.3%, 0.001%.ltoreq. B .ltoreq.0.008%, 0.25%.ltoreq. V .ltoreq.0.35%, 0.23%.ltoreq. N .ltoreq.0.27%, the balance being iron andunavoidable impurities wherein: Ni(eq.).gtoreq. 1.11 Cr(eq.) - 8.24, wherein :Cr(eq)=Cr+Mo+1.5Si+5V+3AI+0.02, Ni(eq)=Ni+30C+x(N-0.045)+0.87 wherein: x=30 for N.ltoreq.0.2, x=22 for 0.2

Classes IPC  ?

• C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
• C22C 38/46 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du vanadium
• C22C 38/54 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du bore

Abrégé

The subject of the invention is a process for manufacturing a metal strip having a metal coating for corrosion protection, comprising the steps consisting in:- making the metal strip pass through a bath of molten metal; then- wiping the coated metal strip by means of nozzles that spray a gas on each side of the strip, said gas having an oxidizing power lower than that of an atmosphere consisting of 4% oxygen by volume and 96% nitrogen by volume; and then- making the strip pass through a confinement zone bounded:.cndot. at the bottom, by the wiping line and the upper faces of the wiping nozzles,.cndot. at the top, by the upper part of two confinement boxes placed on each side of the strip, just above the nozzles, and having a height of at least 10 cm in relation to the wiping line and.cndot. on the sides, by the lateral parts of the confinement boxes,the atmosphere in the confinement zone having an oxidizing power lower than that of an atmosphere consisting of 4% oxygen by volume and 96% nitrogen by volume and higher than that of an atmosphere consisting of 0.15% oxygen by volume and 99.85% nitrogen by volume, as well as a coating installation and a confined wiping device (10; 20; 30) for implementing this process.

Classes IPC  ?

• C23C 2/20 - BandesPlaques

Abrégé

One subject of the invention is a process for manufacturing a metal strip having a metal coating for corrosion protection, comprising the steps consisting in:- making the metal strip pass through a bath of molten metal, comprising 0.2 to 8% by weight of aluminum and magnesium in the following proportions:- 0.1 to 8% by weight of magnesium for an aluminum contentequal to or greater than 0.2% but less than 4% by weight or- a content greater than 5% but less than or equal to 8% by weight of magnesium for an aluminum content equal to or greater than 4% but less than or equal to 8% by weight, and comprising up to 0.3% by weight of addition elements, the balance being zinc and inevitable impurities; then- wiping the coated metal strip by means of nozzles that spray a gas on each side of the strip, said gas having an oxidizing power lower than that of an atmosphere consisting of 4% oxygen by volume and 96% nitrogen by volume; and then- making the strip pass through a confinement zone bounded:.cndot. at the bottom, by the wiping line and the upper external faces of said wiping nozzles,.cndot. at the top, by the upper part of two confinement boxes placed on each side of the strip, just above said nozzles, and having a height of at least 10 cm in relation to the wiping line and.cndot. on the sides, by the lateral parts of said confinement boxes,the atmosphere in said confinement zone having an oxidizing power lower than that of an atmosphere consisting of 4% oxygen by volume and 96%nitrogen by volume and higher than that of an atmosphere consisting of 0.15% oxygen by volume and 99.85% nitrogen by volume.Other subjects of the invention are a metal strip that can be obtained by this process and a metal part obtained by deforming this strip.

Classes IPC  ?

• C23C 2/20 - BandesPlaques

Abrégé

The invention relates to a process for recycling blast furnace gas in which gases resulting from the blast furnace undergo a CO2 purification step from which they are reinjected at a first top and at a second bottom injection point of the blast furnace, in which the gases from the bottom and top injection lines are heated by means of heaters. The process is essentially characterized in that a portion of the CO-rich gas (18) is directly introduced into the top injection line (21), in that the temperature at the top injection line (21) and at least one gas flow (38,39) upstream of the system of heaters (30,33;45) are measured, and in that the flow of cold gas to be introduced into this top injection line (21) and at least one gas flow to be introduced into the system of heaters (30,33;45) are adjusted accordingly.

Classes IPC  ?

• C21B 5/06 - Utilisation des gaz de sortie des hauts fourneaux

Abrégé

A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order : providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the pre-coating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cut-ting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature T i comprised between T e- 10.degree.C and T e, Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature T i up to a temperature T m comprised between 840 and 950.degree.C under non protective atmosphere with a heating rate V comprised between 30.degree.C/s and 90.degree.C/s, V being the heating rate between the temperature T i and the temperature T m, in order to obtain a coated heated blank, then soaking the coated heated blank at said temperature T m for a time t m comprised between 20s and 90s, then hot stamping the blank in order to obtain a hot stamped coated part, then cooling said stamped part at a cooling rate in order to form a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.

Classes IPC  ?

• B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
• C21D 1/70 - Revêtements temporaires ou matériaux d'enrobage appliqués avant ou pendant le traitement thermique pendant le chauffage ou la trempe

Abrégé

The invention relates to an annealed, cold-rolled, dual phase steel sheet having a strength of 980 to 1100 MPa and an elongation at break greater than 9%, comprising the following composition (as expressed in wt.-%): 0.055% = C = 0.095%, 2% = Mn = 2.6%, 0.005% = Si = 0.35%, S = 0.005%, P = 0.05%, 0.1 = Al = 0.3%, 0.05% = Mo = 0.25%, 0.2% = Cr = 0.5%, assuming that Cr+2Mo = 0.6%, Ni = 0.1%, 0.01 = Nb = 0.04%, 0.01 = Ti = 0.050%, 0.0005 = B = 0.0025%, 0.002% = N = 0.007%, the remainder of the composition consisting of iron and inevitable impurities resulting from production.

Classes IPC  ?

• C21D 8/02 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication de produits plats ou de bandes
• C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
• C23C 2/02 - Pré-traitement du matériau à revêtir, p. ex. pour le revêtement de parties déterminées de la surface
• C23C 2/06 - Zinc ou cadmium ou leurs alliages

Abrégé

The invention relates to a method for producing a metal strip having an anti-corrosion metal coating, including steps consisting of: dipping the metal strip into a molten metal bath containing 2 to 8 wt % aluminum, 0 to 5 wt % magnesium and up to 0.3 wt % alloying elements, the remainder comprising zinc and inevitable impurities, said bath being maintained at a temperature of between 350 and 700°C; drying the coated metal strip by means of nozzles spraying a gas on both sides of the strip; and cooling the coating in a controlled manner until the complete solidification thereof, said cooling being carried out at a speed less than 15°C/s between the temperature after drying and the start of the solidification thereof, then at a speed greater than or equal to 15°C/s between the start and end of the solidification thereof. The invention also relates to a metal strip obtainable using said method, as well as to a metal part obtained by deformation of said strip.

Classes IPC  ?

• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 2/26 - Post-traitement

Abrégé

The invention relates to a method for coating a metal strip that comprises depositing in a vacuum a layer of an oxidizable metal or oxidizable metal alloy or metal oxide on a metal strip previously coated with zinc or a zinc alloy, winding the coated metal strip, and applying a static diffusion processing to the wound strip in order to obtain a strip with a coating that includes, at the upper portion, a layer of an alloy formed by the diffusion of the oxidizable metal or oxidizable metal alloy in the entirety or in a portion of the zinc or zinc-alloy layer. The invention also relates to equipment for implementing said method.

Classes IPC  ?

• C23C 2/06 - Zinc ou cadmium ou leurs alliages
• C23C 2/26 - Post-traitement
• C23C 2/28 - Post-traitement thermique, p. ex. par traitement dans un bain d'huile
• C23C 14/02 - Pré-traitement du matériau à revêtir
• C23C 14/06 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement caractérisé par le matériau de revêtement
• C23C 14/58 - Post-traitement
• C23C 28/02 - Revêtements uniquement de matériaux métalliques