A defect detection and remediation system can be used to detect and remediate sub-surface defects within a cast metal during the continuous casting stage. The system can include a detection device having one or more detection units to detect a defect within the cast metal using ultrasonic waves and a remediation device having one or more remediation units to remediate the defect detected by the detection device in a target area of the cast metal containing the detected defect.
A cold-rolled enameling sheet steel has equivalent or better properties than the prior art Type 1 enameling sheet steel and approaches the formability of a Type 3 enameling sheet steel.
A process for joining steel plate includes providing a steel plate and joining the steel plate to another material. The steel plate includes at least one surface having an Al-Si coating. The step of joining the steel plate to another material is performed while the steel plate is in an as- coated condition. Joining is performed using a forging process.
SHIELDING AND COOLING A CONTINUOUS WELD BETWEEN STEEL SHEETS/PLATES USING A NON-OXIDIZING ATMOSPHERE TO REDUCE THE FORMATION OF OXIDE ON A SURFACE OF THE CONTINUOUS WELD
An apparatus for use in a continuous welding system including a welding head configured to remain stationary relative to translating steel sheets or plates. The apparatus includes a hollow elongate body and a port. The body extends between two closed ends. The port is coupled to a non-oxidizing gas source and in communication with the body. The body defines a plurality of openings. The openings are configured to direct non-oxidizing gas towards the steel sheets or plates to simultaneously shield a weld formed by the welding head from atmosphere and cool the weld.
B23K 9/16 - Soudage ou découpage à l'arc utilisant des gaz de protection
B23K 11/00 - Soudage par résistanceSectionnement par chauffage par résistance
B23K 13/06 - Soudage par chauffage au moyen d'un courant haute fréquence caractérisé par la protection de la zone de soudage contre l'influence de l'atmosphère environnante
B23K 26/14 - Travail par rayon laser, p. ex. soudage, découpage ou perçage en utilisant un écoulement de fluide, p. ex. un jet de gaz, associé au faisceau laserBuses à cet effet
5.
REDUCTION AND REMOVAL OF PROCESS OXIDES ON STAINLESS STEEL
Oxides formed during annealing of stainless steel strip are removed with abrasive brushes, in lieu of acid or molten salt based pickling. In some embodiments, the stainless steel strip is treated with a rare earth element or a related transition metal before annealing, and then brushed after annealing to remove any oxides. The selection of brushes can impart a finished appearance to conventionally polished stainless steel.
B08B 1/00 - Nettoyage par des procédés impliquant l'utilisation d'outils
B08B 1/04 - Nettoyage par des procédés impliquant l'utilisation d'outils, de brosses ou d'éléments analogues utilisant des éléments actifs rotatifs
B21B 45/04 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour décaper, p. ex. décalaminer
B24B 1/00 - Procédés de meulage ou de polissageUtilisation d'équipements auxiliaires en relation avec ces procédés
C23C 22/00 - 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
C23C 22/22 - Orthophosphates contenant des cations de métaux alcalino-terreux
C23C 22/36 - 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 contenant des fluorures ou des fluorures complexes et des phosphates
6.
METHOD AND APPARATUS FOR EXTENDING THE CAMPAIGN LIFE OF STABILIZERS FOR A COATING LINE
A steel processing line includes a roller submerged in a quantity of molten metal. The roller includes two journals. Each journal is received by an opening defined by a roller sleeve having a ceramic or refractory material. The roller sleeve is disposed between each journal and a bearing block to reduce or prevent wear on the journal. An inner dimension of each roller sleeve and an outer dimension of each respective journal defines a clearance. The inner dimension of each roller sleeve and the outer dimension of each respective journal is configured such that the clearance persists as the roller and the pair of roller sleeves are heated by the molten metal.
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
A method of colorizing stainless steel strip involves the continuous surface treatment of stainless steel strip with aqueous suspensions of rare earth oxide nano or micro particles or aqueous rare earth nitrate solutions of nano or micro particles. The surface treatment can be applied by roll coating, spraying or other conventional application techniques. The coated strip is then continuously annealed. The surface treatment can provide a variety of colors. It also improves corrosion resistance of the processed stainless steel strip. Steel strip treated in this manner is suitable for a variety of applications in the building systems, automotive and appliance markets.
C21D 1/76 - Réglage de la composition de l'atmosphère
C21D 6/00 - Traitement thermique des alliages ferreux
C23C 18/12 - Revêtement chimique par décomposition soit de composés liquides, soit de solutions des composés constituant le revêtement, ne laissant pas de produits de réaction du matériau de la surface dans le revêtementDépôt par contact par décomposition thermique caractérisée par le dépôt sur des matériaux inorganiques, autres que des matériaux métalliques
A laminated steel includes at least one laminate applied to one or more surfaces of a steel substrate using a zinc phosphate coating. Such a zinc phosphate coating can bond the steel substrate and laminate, while also eliminating the need for an additional cleaning step or pretreating step with a chromic solution prior to application of the laminate. This provides a more efficient and cost-effective process of applying the laminate to the steel.
C23C 22/12 - Orthophosphates contenant des cations du zinc
B32B 15/18 - Produits stratifiés composés essentiellement de métal comportant du fer ou de l'acier
B32B 27/08 - Produits stratifiés composés essentiellement de résine synthétique comme seul composant ou composant principal d'une couche adjacente à une autre couche d'une substance spécifique d'une résine synthétique d'une sorte différente
Prior third generation advanced high strength steels can produce ingots and hot bands that have a tendency to develop cracks. It has been found that an addition to third generation advanced high strength steels of one or more of molybdenum in an amount up to 0.50 wt % and nickel in an amount up to 1.5 wt %, eliminates the cracks in ingots, and improves the appearance of hot bands. More specifically the new exemplary alloys have shown to improve the toughness of ingots, as well as hot bands.
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 38/08 - Alliages ferreux, p. ex. aciers alliés contenant du nickel
C22C 38/12 - Alliages ferreux, p. ex. aciers alliés contenant du tungstène, du tantale, du molybdène, du vanadium ou du niobium
C22C 38/44 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du molybdène ou du tungstène
C22C 38/48 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et du niobium ou du tantale
C22C 38/58 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du nickel et plus de 1,5% en poids de manganèse
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 9/00 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet
C21D 9/46 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles
10.
REDUCTION AT ELEVATED TEMPERATURE OF COATED STEELS CONTAINING METASTABLE AUSTENITE
Warming a metastable steel after coating and before or during cold rolling suppresses the transformation of austenite to martensite, resulting in lower mill loads and higher amounts of reduction at similar loads. As-warm rolled steel has enhanced mechanical properties when compared to steel reduced the same amount by cold rolling at room temperature.
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
A submerged entry nozzle for a continuous casting process includes a pair of triangular shaped ports that narrow from a top portion to a bottom portion of the ports. These triangular shaped ports may improve fluid flow at the discharge of the ports by increasing the velocity of the liquid steel exiting the nozzle and into the mold.
A continuous coating line includes a roll assembly exposed to molten metal. The roll assembly includes a roll rotatable relative to a bearing block. The roll includes a roll portion and a journal protruding from each end of the roll portion. The roll is made from a refractory ceramic material that is resistant to wear, abrasion, and corrosion when the roll is exposed to the molten metal.
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
13.
PRESS HARDENED STEEL WITH TAILORED PROPERTIES AFTER NOVEL THERMAL TREATMENT
A tailor-welded blank is created by forming a blank from a steel of composition A and a steel of composition B and welding said two steels together, heating said welded blank to a temperature above the Ac1 temperature associated with the steel of composition A, transferring said blank to a forming die, and then cooling said blank to a temperature between the martensite start temperature and martensite finish temperature of the steel of composition B and holding said blank at such temperature or at a higher temperature, cooling said blank to room temperature. The tailor-welded blank comprises Alloy A and Alloy B, wherein Alloy A comprises 0.10 - 0.50 wt % C, 0.1 - 0.5 wt % Si, 2.0 - 8.0 wt % Mn, 0- 6.0 wt% Cr, 0.0 - 2 wt% Mo, and 0.0 - 0.005 wt% B and wherein Alloy B comprises 0.06 - 0.12 wt% C, 0.1 - 0.25 wt% Si, 1.65 - 2.42 wt% Mn, 0.0 - 0.70 wt% Cr, 0.08 - 0.40 wt% Mo, 0.0 - 0.05 wt% V, 0.01 - 0.05 wt% Ti, and 2 wt % A1 or less, and wherein said tailor-welded blank is subject to a quench and partition thermal cycle in a forming die.
Rather than using a conventional stamping forming process with steels having high ultimate tensile strength and relatively low initial yield, tubular hydroforming techniques are introduced to synergize with BIW part forming, or forming of other load bearing parts. Such steels can have ultimate tensile strengths of greater than 1000 MPa and initial yields of less than 360 MPa In some embodiments, the steels have elongation of at least 40%. Such steels can include retained austenite.
B21D 26/053 - Mise en forme sans coupage, autrement qu'en utilisant des dispositifs ou outils rigides, des masses souples ou élastiques, p. ex. mise en forme en appliquant une pression de fluide ou des forces magnétiques en appliquant une pression de fluide caractérisée par le matériau des flans
C21D 7/10 - Modification des propriétés physiques du fer ou de l'acier par déformation par travail à froid sur toute la section droite, p. ex. des tiges d'armature pour béton
B21D 53/88 - Fabrication d'autres objets particuliers d'autres parties de véhicules, p. ex. capots, garde-boue
16.
A METHOD FOR FACILITATING THERMOMECHANICAL FORMING PROCESS OF AUSTENITE CONTAINING GRADES TO PRODUCE TAILORED STRENGTH STRUCTURAL COMPONENTS
A method to quantitatively determine the amount of deformation induced martensite as a function of temperature and strain in austenitic stainless steels is used to customize the strength and elongation characteristics of certain portions of a formed structural component. Predicting the martensitic volume fraction in a specific part location permits design of particular components with customized strength characteristics that can be consistently repeatably manufactured.
B21D 26/057 - Mise en forme sans coupage, autrement qu'en utilisant des dispositifs ou outils rigides, des masses souples ou élastiques, p. ex. mise en forme en appliquant une pression de fluide ou des forces magnétiques en appliquant une pression de fluide caractérisée par le matériau des flans les flans étant composés de tôles de nature ou d'épaisseur différentes
17.
SLAB REHEAT FURNACE SKID BUTTON AIMING TO REDUCE GOUGE OF STAINLESS STEEL SLABS
A skid rider button is provided for use in a steel reheating furnace to reduce gouge-type damage of a steel slab heated in the reheating furnace. The button includes a top surface defining an interface surface area to receive the steel slab to be reheated, a bottom surface couplable with a skid assembly of the reheating furnace, a front surface, a rear surface, and two opposing side surfaces positioned between the front surface and the rear surface. An overall height of the button between the bottom surface and the top surface may be reduced to lower the interface temperature of the button. The interface surface area may be increased to lower the interface temperature of the button. The button may include rounded edges between each of the surfaces to reduce the mechanical impact between the button and the steel slab.
Press hardened steels exhibit increased strength in the press hardened steel parts without a corresponding decrease in elongation. Substitutional elements are included in the steel composition to increase the strength of martensite through a combination of substitutional solute strengthening and a reduction in softening that results from autotempering. Softening as a result of autotempering is minimized by suppression of the martensite start (Ms) temperature through the alloying. As a result of the increased hardenability in the proposed compositions that results from various additions of manganese, chromium, molybdenum, and niobium, the steel compositions permit a boron-free press hardening steel.
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 38/22 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du molybdène ou du tungstène
C22C 38/24 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du vanadium
C22C 38/26 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du niobium ou du tantale
C22C 38/32 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du bore
C22C 38/38 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de manganèse
B21D 22/02 - Estampage utilisant des dispositifs ou outils rigides
B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
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
Hot-rolled steels provide increased strength without degrading elongation or weldability. Substitutional elements are included in the steel composition to increase the propensity of the steel to form martensite after hot-rolling processes despite relatively low cooling rates encountered during the hot-rolling processes.
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
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/22 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du molybdène ou du tungstène
C22C 38/24 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du vanadium
C22C 38/26 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et du niobium ou du tantale
C22C 38/38 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de manganèse
A continuous casting nozzle includes a deflector at a bottom portion of the nozzle having a bore extending through the deflector from an open end to a closed end along a longitudinal axis and a pair of ports extending through the deflector from the bore to an outer surface of the deflector. A diameter of the bore substantially rapidly decreases along the longitudinal axis above the pair of ports such that a portion of a flow of fluid through the deflector becomes detached from a surface of the bore to thereby redirect the flow of fluid toward the longitudinal axis prior to exiting through the pair of ports.
A method for processing a press hardenable steel includes first heating a slab of the press hardenable steel. The slab is heated to a re-heat furnace temperature of approximately 2300 °F. The slab is subjected to rolling into a steel sheet having a predetermined thickness. The temperature of the slab during rolling corresponds to a rolling temperature that is greater than or equal to 1600 °F.The steel sheet is coiled. The temperature of the steel sheet during coiling corresponds to a coiling temperature of approximately 1050 °F.
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
C21D 9/48 - Traitement thermique, p. ex. recuit, durcissement, trempe ou revenu, adapté à des objets particuliersFours à cet effet pour tôles tôles embouties
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
A weld wheel cleaning system is provided to clean or remove a layer of embedded material and other debris produced from welding from the working surface of a weld wheel (22, 24). Such a weld wheel cleaning system includes a cleaner (50) with an abrasive material (52) positioned on an outer surface of the cleaner. The cleaner (50) is positionable adjacent to the weld wheel (22, 24) such that the abrasive material (52) is aligned with the working surface of the weld wheel. An actuator can be used to selectively actuate the cleaner (50) with a force sufficient to remove the layer of embedded material from the working surface of the weld wheel with the abrasive material. The debris from the cleaner (50) can be removed by a vacuum (40).
A process involves the continuous surface treatment of stainless steel coils with aqueous suspensions of rare earth oxide nano or micro particles or aqueous rare earth nitrate solutions of nano or micro particles. The surface treatment can be applied by roll coating, spraying or other conventional application techniques. The treated material in coil form is then heated in an annealing box using an open coil process whereby a wire is placed between coil laps to promote uniform atmosphere exposure. The atmosphere can be reducing or oxidizing and the times can vary from 1 hr to 100 hr. The atmosphere can also be wet (high dew point) or dry (low dew point). The surface treatment promotes a more uniform color to the subsequently developed oxide formed during anneal-type heat treatment. It also improves corrosion resistance of the processed stainless steel material. Materials treated in this manner are suitable for a variety of applications in the building systems, automotive and appliance markets.
C21D 1/76 - Réglage de la composition de l'atmosphère
B82Y 30/00 - Nanotechnologie pour matériaux ou science des surfaces, p. ex. nanocomposites
C09D 5/00 - Compositions de revêtement, p. ex. peintures, vernis ou vernis-laques, caractérisées par leur nature physique ou par les effets produitsApprêts en pâte
C21D 6/00 - Traitement thermique des alliages ferreux
C21D 1/70 - Revêtements temporaires ou matériaux d'enrobage appliqués avant ou pendant le traitement thermique pendant le chauffage ou la trempe
C23C 22/00 - 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
C21D 9/67 - Fours à plusieurs positions adaptés au traitement de la charge sous vide ou dans une atmosphère particulière
24.
HIGH ELONGATION PRESS HARDENED STEEL AND MANUFACTURE OF THE SAME
The residual ductility of currently available press hardened steel is approximately six percent. This characteristic of the material is primarily due to the fully martensitic microstructure in the hot stamped condition. The present alloys and processing improve the residual ductility of steels for use in press hardening applications. A series of specialized heat treatments were applied to a variety of new alloys to obtain higher residual ductility and a significant volume fraction of retained austenite in the as-hot stamped microstructure.
C22C 38/00 - Alliages ferreux, p. ex. aciers alliés
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
A continuous casting machine is provided that includes a refractory tundish funnel. The tundish funnel has a tapered shape and is designed to sit on a tundish lid in order to channel steel from the ladle to the tundish bath. A collector can also be provided to channel the steel from the ladle. The collector has an opening with a cross-section that transitions from a cylindrical shape to a cross-shape.
A steel processing line includes a dip tub and a stab roll. The dip tub is filled with a quantity of molten metal. At least a portion of the stab roll is submerged in the quantity of molten metal. The stab roll includes two journals. Each journal is received by an opening defined by a roller sleeve including a ceramic or refractory material. The roller sleeve is disposed between each journal and a bearing block. An inner dimension of each roller sleeve and an outer dimension of each respective journal defines a clearance. The inner dimension of each roller sleeve and the outer dimension of each respective journal is configured such that the clearance persists as the stab roll and the pair of roller sleeves are heated by the molten metal. Alternatively, inserts are fastened to an outer surface of each journal in lieu of the roller sleeves.
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
F16C 43/02 - Assemblage des éléments de paliers à contact glissant
F16C 13/04 - Paliers n’enfermant que partiellement l’organe à supporterPaliers avec support local en plusieurs points
F16C 33/26 - CoussinetsBaguesGarnitures antifriction constitués de bobines de filsCoussinetsBaguesGarnitures antifriction constitués d'un certain nombre de disques, anneaux, tiges ou autres organes
27.
WARM ROLLING OF STEELS CONTAINING METASTABLE AUSTENITE
Warming a metastable steel before or during cold rolling suppresses the transformation of austenite to martensite, resulting in lower mill loads and higher amounts of reduction at similar loads. As-warm rolled steel has enhanced mechanical properties when compared to steel reduced the same amount by cold rolling. Warm rolling followed by subsequent annealing also results in better mechanical properties than those achieved in material cold rolled the same amount and then annealed. Metastable steel that has been warm rolled, on subsequent room temperature rolling (cold rolling), also shows enhancement in both strength and ductility.
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
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
To improve the stiffness of a thin single layer or mono-sheet of steel, a composite steel comprising at least two outer steel layers separated with a spacer. Spacer materials can include any metal less dense than steel, or a polymer or resin, optionally comprising a carbon or glass fiber, or Kevlar material. Such a composite steel can yield a higher stiffness than a mono-sheet of steel having the same total sheet thickness. For instance, moving the steel material away from the neutral axis with the spacer can increase the strain on bending to provide a high strength composite steel that maintains stiffness while also providing desirable weight savings.
B32B 15/01 - Produits stratifiés composés essentiellement de métal toutes les couches étant composées exclusivement de métal
B32B 7/00 - Produits stratifiés caractérisés par la relation entre les couchesProduits stratifiés caractérisés par l’orientation relative des éléments caractéristiques entre les couches, ou par les valeurs relatives d’un paramètre mesurable entre les couches, c.-à-d. produits comprenant des couches ayant des propriétés physiques, chimiques ou physicochimiques différentes Produits stratifiés caractérisés par la jonction entre les couches
B32B 7/12 - Liaison entre couches utilisant des adhésifs interposés ou des matériaux interposés ayant des propriétés adhésives
B32B 15/00 - Produits stratifiés composés essentiellement de métal
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
B32B 15/20 - Produits stratifiés composés essentiellement de métal comportant de l'aluminium ou du cuivre
B62D 29/00 - Carrosseries caractérisées par le matériau utilisé
To improve the formability of dual phase steels, the marten site phase is tempered. It may form a ferrite-carbide structure. The tempering step occurs after marten site has been formed in the dual phase steel. The tempering step can occur in a box annealing step or it can be performed in a continuous fashion, such as on a continuous annealing, continuous tempering heat treating, or continuous coating line. The tempering step can further comprise a temper rolling on a temper mill after the heating step.
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 8/12 - Modification des propriétés physiques par déformation en combinaison avec, ou suivie par, un traitement thermique pendant la fabrication d'objets à propriétés électromagnétiques particulières
30.
LOW ALLOY THIRD GENERATION ADVANCED HIGH STRENGTH STEEL
A high strength steel comprises, during intercritical annealing, about 20-80% volume ferrite and 20-80% austenite, and wherein the Ms temperature calculated for the austenite phase during intercritical anneal <100°C. The high strength steel exhibits a tensile elongation of at least 20% and an ultimate tensile strength of at least 880 MPa. The high strength steel may comprise 0.20-0.30 wt % C, 3.0-5.0 wt % Mn, with Al and Si additions such that the optimum intercritical temperature is above 700 °C.
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
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
31.
HIGH MANGANESE 3RD GENERATION ADVANCED HIGH STRENGTH STEELS
A high strength steel comprises up to about 0.25wt% C, up to about 2.0wt%Si, up to about 2.0wt% Cr, up to 14% Mn, and less than 0.5% Ni. It preferably has an Ms temperature less than 50°C. The high strength steel may have a tensile strength of at least 1000 MPa and total elongations of at least about 25% after hot rolling. It may have a tensile strength of at least 1200 MPa and total elongations of at least about 20% after hot rolling.
C22C 38/02 - Alliages ferreux, p. ex. aciers alliés contenant du silicium
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 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
A method for processing a dual phase steel sheet. The method includes heating the steel sheet to a first temperature (Tl), cooling the steel sheet to a second temperature (T2), transitioning the steel sheet to a third temperature (T3), and cooling the steel sheet to room temperature. Tl is at least above the temperature at which the steel sheet transforms to austenite and ferrite. T2 is below the martensite start temperature (Ms). The cooling rate to T2 is sufficiently rapid to transform at least some austenite to martensite.
C22C 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
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
33.
GRAIN ORIENTED ELECTRICAL STEEL WITH IMPROVED FORSTERITE COATING CHARACTERISTICS
Increasing the chromium content of an electrical steel substrate to a level greater than or equal to about 0.45 weight percent (wt%) produced a much improved forsterite coating having superior and more uniform coloration, thickness and adhesion. Moreover, the so-formed forsterite coating provides greater tension potentially reducing the relative importance of any secondary coating.
C21D 1/76 - Réglage de la composition de l'atmosphère
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 38/04 - Alliages ferreux, p. ex. aciers alliés contenant du manganèse
C22C 38/06 - Alliages ferreux, p. ex. aciers alliés contenant de l'aluminium
C22C 38/34 - Alliages ferreux, p. ex. aciers alliés contenant du chrome et plus de 1,5% en poids de silicium
34.
HIGH STRENGTH STEEL EXHIBITING GOOD DUCTILITY AND METHOD OF PRODUCTION VIA IN-LINE HEAT TREATMENT DOWNSTREAM OF MOLTEN ZINC BATH
Steel with high strength and good formability is produced with compositions and methods for forming austenitic and martensitic microstructure in the steel. Carbon, manganese, molybdenum, nickel copper and chromium may promote the formation of room temperature stable (or meta- stable) austenite by mechanisms such as lowering transformation temperatures for non-martensitic constituents, and/or increasing the hardenability of steel. Thermal cycles utilizing a rapid cooling below a martensite start temperature followed by reheating may promote formation of room temperature stable austenite by permitting diffusion of carbon into austenite from martensite.
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
C23C 2/02 - Pré-traitement du matériau à revêtir, p. ex. pour le revêtement de parties déterminées de la surface
Steel with high strength and good formability is produced with compositions and methods for forming austenitic and martensitic microstructure in the steel. Carbon, manganese, molybdenum, nickel copper and chromium may promote the formation of room temperature stable (or meta-stable) austenite by mechanisms such as lowering transformation temperatures for non-martensitic constituents, and/or increasing the hardenability of steel. Thermal cycles utilizing a rapid cooling below a martensite start temperature followed by reheating may promote formation of room temperature stable austenite by permitting diffusion of carbon into austenite from martensite.
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 38/00 - Alliages ferreux, p. ex. aciers alliés
C22C 38/18 - Alliages ferreux, p. ex. aciers alliés contenant du chrome
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 2/02 - Pré-traitement du matériau à revêtir, p. ex. pour le revêtement de parties déterminées de la surface
A zinc-coated steel may be produced by performing a pre-alloying heat treatment after galvannealing the steel and prior to the hot stamping the steel. The pre-alloying heat treatment is conducted at a temperature between about 850°F and about 950°F in an open coil annealing process. The pre-alloying heat treatment allows for shorter time at the austenitization temperature to form a desired a-Fe phase in the coating by increasing the concentration of iron. This also decreases the loss of zinc, and a more adherent oxide exists after hot stamping.
Ferritic stainless steels with good oxidation resistance, good high temperature strength, and good formability are produced with Ti addition and low A1 content for room temperature formability resulting from equiaxed as-cast grain structures. Columbium (niobium) and copper are added for high temperature strength. Silicon and manganese are added for oxidation resistance. The ferritic stainless steels provide better oxidation resistance than ferritic stainless steels of 18Cr-2Mo and 15Cr-Cb-Ti-Si-Mn. In addition, they are generally less costly to produce than 18Cr-2Mo.
A cost effective ferritic stainless steel exhibits improved corrosion resistance comparable to that observed on Type 304L steel. The ferritic stainless steel is substantially nickel-free, dual stabilized with titanium and columbium, and contains chromium, copper, and molybdenum.
A pickling process designed for pickling a metal strip such as a stainless steel strip reduces the amount of HF and/or HN03. The strip is immersed in at least one first pickling tub that contains a mixture of an acid such as H2S04, an excess of at least one oxidizing agent, and includes electrodes that may apply a current to the strip that runs through the mixture.
A meniscus coating apparatus and method for coating at least one surface of a metal strip includes an apparatus having an adjustable coating tray, a roll enclosure disposed adjacent the coating tray, an adjustable baffle, and/or a gas delivery device operable to help seal the roll enclosure.
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
41.
GALVANIZED CARBON STEEL WITH STAINLESS STEEL-LIKE FINISH
A"faux stainless steel" may be produced by processing galvanized carbon steel through a temper mill using textured rolls to develop a "polished" type surface. The galvanized coating is not removed by abrasion but is compressed thereby providing a more uniform substrate than conventional polishing or brushing. The resulting strip may then be coated with an organic film to provide additional appearance and corrosion benefits including anti-fingerprint resistance.
An austenitic stainless steel ammunition cartridge (12) includes an outer region (16) and a base, wherein the outer region (16) is about 50% - 80% of the thickness of the base, which serves to minimize the sidewall ironing required to form the cartridge. The cartridge blank (10) can be formed by spin forming, compression forming, grinding, or a combination thereof. Tooling (76) to form the blank (10) can include at least a pair of blocks (80) and inserts (78), at least one insert defining a centrally positioned aperture (82).
A composite material comprising a metallic substrate and a coating on at least one side of the metallic substrate, wherein the coating comprises an acrylic or styrene-acrylic based polymer and is less than 0.00508 mm (0.2 mils) thick, wherein the polymer has a molecular weight of 50,000 to 1,000,000, a glass transition temperature (Tg) of 50-80oC, and comprises 90-100 wt. % of the total solids in the coating. The method of applying a coating to a metal substrate using a manifold flood and squeegee roll configuration or alternatively roll coater techniques; wherein the roll hardness, shape, pressure and speed are chosen to ensure that the coating composition forms a continuous wet film on the metallic substrate surfaces when the strip travels at up to 600 feet per minute; and the wet film has a uniform thickness of 0.0508 mm (2 mil (0.002 inch)) or less.
The pickling process designed for pickling electrical steel strip in a continuous fashion comprising immersing the strip in at least one pickling tub. The pickling tub contains a mixture of HCl, Fe2+, and Fe3+ and a low concentration of HF. Upon exiting the final pickling tub, the strip may be brushed or scrubbed to loosen any residual scale to form a clean strip.
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