A method to manufacture a steel product in a steelmaking plant including several different tools, the method including the definition of at least two manufacturing routes using different tools and the calculation of the expected level of CO2 emissions associated to each of this defined manufacturing routes.
A method to manufacture a global tonnage of steel products in at least two steelmaking units wherein expected level emissions are calculated and compared with pre-defined targets.
The invention relates to a metal powder for additive manufacturing having a composition comprising the following elements, expressed in content by weight: 15% ≤ Mn ≤ 35% 6% ≤ Al ≤ 15% 0.5% ≤ C ≤ 1.8% 0.4% ≤ Ti ≤ 4.5% 0 ≤ Si ≤ 3.5% P ≤ 0.013% S ≤ 0.015% N ≤ 0.100% and optionally containing Ni ≤ 8.5 wt.% and/or Cr ≤ 2.5 wt.% and/or B ≤ 0.1 wt.% and/or one or more elements chosen among Ta, Zr, Nb, V, Ti, Mo, and W in a cumulated amount of up to 2.0 wt.%, the balance being iron and unavoidable impurities resulting from the elaboration. It also deals with a process for manufacturing such powder and for manufacturing a printed part out of it.
B22F 1/05 - Metallic powder characterised by the size or surface area of the particles
B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
The invention relates to a metal powder for additive manufacturing having a composition comprising the following elements, expressed in content by weight: − 15% ≤ Mn ≤ 35% − 6% ≤ Al ≤ 15% − 0.5% ≤ C ≤ 1.8% − 1.6% ≤ Si ≤ 3.5% − P ≤ 0.013% − S ≤ 0.015% − N ≤ 0.100% and optionally containing Ni ≤ 8.5 wt.% and/or Cr ≤ 2.5 wt.% and/or B ≤ 0.1wt.% and/or one or more elements chosen among Ta, Zr, Nb, V, Ti, Mo, and W in a cumulated amount of up to 2.0 wt.%, the balance being iron and unavoidable impurities resulting from the elaboration. It also deals with a process for manufacturing such powder and for manufacturing a printed part out of it.
B22F 1/05 - Metallic powder characterised by the size or surface area of the particles
B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
The invention relates to a metal powder having a composition comprising the following elements, expressed in content by weight: − 15% ≤ Mn ≤ 35% − 6% ≤ Al ≤ 15% − 0.5% ≤ C ≤ 1.8% − 0% ≤ Si ≤ 0.5% − P ≤ 0.013% − S ≤ 0.015% − N ≤ 0.100% and optionally containing Ni ≤ 8.5 wt.% and/or Cr ≤ 2.5 wt.% and/or B ≤ 0.1 wt.% and/or one or more elements chosen among Ta, Zr, Nb, V, Ti, Mo, and W in a cumulated amount of up to 2.0 wt.%, the balance being iron and unavoidable impurities resulting from the elaboration. It also deals with a process for manufacturing such powder and for manufacturing a printed part out of it.
B22F 1/05 - Metallic powder characterised by the size or surface area of the particles
B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
A device for determining the chemical composition of a liquid metallurgical product emitting electromagnetic radiations. The device including a collection probe configured to acquire the electromagnetic radiations emitted by the metallurgical product in a predetermined wavelength range Δλ, a spectroscopic device connected to the collection probe and configured to generate a spectral signal of the acquired electromagnetic radiations and processing means including a database of reference radiances. A method using the device is also provided.
G01N 21/71 - Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
A method of manufacturing a steel product into at least two different steelmaking units wherein an expected level of CO2 emissions for the manufacturing of said product in each respective steelmaking unit is calculated.
The invention relates to a metal powder for additive manufacturing having a composition comprising the following elements, expressed in content by weight: − 15% ≤ Mn ≤ 35% − 6% ≤ Al ≤ 15% − 0.5% ≤ C ≤ 1.8% − 0% ≤ Si ≤ 0.5% − P ≤ 0.013% − S ≤ 0.015% − N ≤ 0.100% and optionally containing Ni ≤ 8.5 wt.% and/or Cr ≤ 2.5 wt.% and/or B ≤ 0.1 wt.% and/or one or more elements chosen among Ta, Zr, Nb, V, Ti, Mo, and W in a cumulated amount of up to 2.0 wt.%, the balance being iron and unavoidable impurities resulting from the elaboration. It also deals with a process for manufacturing such powder and for manufacturing a printed part out of it.
B22F 1/05 - Metallic powder characterised by the size or surface area of the particles
B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
B22F 10/25 - Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
The invention relates to a metal powder having a composition comprising the following elements, expressed in content by weight: 15% ≤ Mn ≤ 35% 6% ≤ Al ≤ 15% 0.5% ≤ C ≤ 1.8% 0.4% ≤ Ti ≤ 4.5% 0 ≤ Si ≤ 3.5% P ≤ 0.013% S ≤ 0.015% N ≤ 0.100% and optionally containing Ni ≤ 8.5 wt.% and/or Cr ≤ 2.5 wt.% and/or B ≤ 0.1 wt.% and/or one or more elements chosen among Ta, Zr, Nb, V, Ti, Mo, and W in a cumulated amount of up to 2.0 wt.%, the balance being iron and unavoidable impurities resulting from the elaboration. It also deals with a process for manufacturing such powder and for manufacturing a printed part out of it.
B22F 1/05 - Metallic powder characterised by the size or surface area of the particles
B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
The invention relates to a metal powder having a composition comprising the following elements, expressed in content by weight: − 15% ≤ Mn ≤ 35% − 6% ≤ Al ≤ 15% − 0.5% ≤ C ≤ 1.8% − 1.6% ≤ Si ≤ 3.5% − P ≤ 0.013% − S ≤ 0.015% − N ≤ 0.100% and optionally containing Ni ≤ 8.5 wt.% and/or Cr ≤ 2.5 wt.% and/or B ≤ 0.1wt.% and/or one or more elements chosen among Ta, Zr, Nb, V, Ti, Mo, and W in a cumulated amount of up to 2.0 wt.%, the balance being iron and unavoidable impurities resulting from the elaboration. It also deals with a process for manufacturing such powder and for manufacturing a printed part out of it.
B22F 1/05 - Metallic powder characterised by the size or surface area of the particles
B22F 9/08 - Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
B22F 10/28 - Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
Rear floor panel (1) for an automotive vehicle made from a single metallic blank and comprising reinforced rear and front side portions (11L), (11R), (12L), (12R) compared to the center rear and front portions (11C), (12C). Rear structural assembly (2) comprising a rear floor panel (1) as previously described assembled onto a rear underfloor structure (3), comprising itself a right and left side member (3L), (3R) linked together by at least one cross member (3C).
A method for estimating the temperature of a steel product including a calibration step wherein the intensities at 5 wavelengths ranging from 0.9 to 2.1 μm are recorded for several measurement condition and spectral attenuation coefficients are computed, a measurement step wherein the intensities at said 5 wavelengths are recorded and spectral attenuation coefficients are computed for several temperatures and a comparison step wherein a probability test is performed to estimate the steel product temperature.
A welded steel part with a very high mechanical strength is provided. The welded steel part is obtained by heating followed by hot forming, then cooling of at least one welded blank obtained by butt welding of at least one first and one second sheet. The at least one first and second sheets including, at least in part, a steel substrate and a pre-coating which includes an intermetallic alloy layer in contact with the steel substrate, topped by a metal alloy layer of aluminum or aluminum-based alloy. A method for the fabrication of a welded steel part and the fabrication of structural or safety parts for automotive vehicles are also provided.
B23K 31/02 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to soldering or welding
B23K 26/32 - Bonding taking account of the properties of the material involved
C21D 9/48 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
C21D 9/50 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
C23C 28/02 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of metallic material
14.
COLD ROLLED AND ANNEALED STEEL SHEET, METHOD OF PRODUCTION THEREOF AND USE OF SUCH STEEL TO PRODUCE VEHICLE PARTS
Rear floor panel (1) for an automotive vehicle made from a single metallic blank and comprising reinforced rear and front side portions (11L), (11R), (12L), (12R) compared to the center rear and front portions (11C), (12C). Rear structural assembly (2) comprising a rear floor panel (1) as previously described assembled onto a rear underfloor structure (3), comprising itself a right and left side member (3L), (3R) linked together by at least one cross member (3C).
A method of forming a hot stamped coated steel product includes providing a precoated steel strip, the precoated steel strip including a base steel having a first side and a second side, and a precoating on at least one of the first side and the second side, the precoating being made of aluminum or an aluminum alloy; heating the precoated steel strip in a furnace, wherein the precoated strip experiences a temperature rise at a heating rate (Vc) between 4° and 12° C./s, wherein Vc is a mean heating rate between 20 and 700 C; removing the heated precoated steel strip from the furnace; and then hot stamping the precoated strip to deform the precoated steel strip into a hot stamped coated steel product, the hot stamped coated steel product having a coating including, proceeding from the base steel outwards: (a) an interdiffusion layer, (b) an intermediate layer, (c) an intermetallic layer, and (d) a superficial layer.
A galvannealed steel sheet ontainabel by a method including the provision of a specific steel sheet, a recrystallization annealing with specific heating, soaking and cooling sub-steps using an inert gas, a hot-dip galvanizing and an alloying treatment.
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/14 - Ferrous alloys, e.g. steel alloys containing titanium or zirconium
C22C 38/38 - Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
C22C 38/42 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
C22C 38/44 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
C22C 38/46 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
C22C 38/48 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
C22C 38/50 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
C22C 38/54 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
C22C 38/58 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
C23C 2/00 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
C23C 2/04 - Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
C23C 2/06 - Zinc or cadmium or alloys based thereon
A coated steel sheet and press hardened steel part having a composition including, by weight percent: C 0.26-0.40%, Mn 0.5-1.8%, Si 0.1-1.25%, Al 0.01-0.1%, Cr 0.1-1.0%, Ti 0.01-0.1%, B 0.001-0.004%, P 0.020%, S 0.010%, N 0.010% the remainder of the composition being iron and unavoidable impurities resulting from the smelting. The press hardened steel part includes a bulk having a microstructure including, in surface fraction, more than 95% of martensite and less than 5% of bainite, a coating layer at the surface of the steel part, a ferritic interdiffusion layer between the coating layer and the bulk, and a ratio between the ferritic grain width in the interdiffusion layer GWint over prior austenite grain size in the bulk PAGSbulk, satisfying following equation (GWint/PAGSbulk)−1≥30%.
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
C23C 2/02 - Pretreatment of the material to be coated, e.g. for coating on selected surface areas
A method of production of a coated steel substrate including of the steps to have a steel substrate; performing electroplating of the steel substrate with an electroplating solution having a pH of from 2 to 6 and containing 100 g/l to 500 g/l of NiSO4 and 1 g/l to 15 g/l of MoS2, by applying a current density from 15 A/dm2 to 45 A/dm2 during 30 seconds to 300 seconds to generate a layer of Ni—MoS2 coating; thereafter, rinsing the steel substrate and drying it to obtain a coated steel substrate.
The invention relates to a steel substrate coated on at least one of its faces with a metallic coating based on zinc or its alloys wherein the metallic coating is itself coated with a conversion layer comprising:
zincsulphate hydrate,
aluminium in an amount up to 14 mg·m−2,
wherein the conversion layer comprises neither zinc hydroxysulphate, nor free water molecules nor any compounds having free hydroxyl groups, the surface density of sulphur in the conversion layer being greater than or equal to 5.0 mg/m2. The invention also relates to the corresponding treatment method.
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
Dash panel assembly (1) for an automotive vehicle (100) consisting of a lower dash panel (21) and an upper dash panel (22), such that: -said lower and upper dash panels (21, 22) are each made by forming a single metallic sheet, -said lower dash panel (21) further comprises a lower portion (211) and an overlap portion (212), -said upper dash panel (22) further comprises an upper portion (221) and an overlap portion (222), -once assembled to form the dash panel assembly (1), the dash panel lower and upper (21, 22) overlap each other in their respective overlap portion (212, 222) to form the overlap portion (12) of the dash panel assembly and do not overlap each other in the lower portion of the lower dash panel (211) and the upper portion of the upper dash panel (221).
Dash panel assembly (1) for an automotive vehicle (100) consisting of a lower dash panel (21) and an upper dash panel (22), such that: -said lower and upper dash panels (21, 22) are each made by forming a singlemetallic sheet, -said lower dash panel (21) further comprises a lower portion (211) and anoverlap portion (212), -said upper dash panel (22) further comprises an upper portion (221) and anoverlap portion (222), -once assembled to form the dash panel assembly (1), the dash panel lower andupper (21, 22) overlap each other in their respective overlap portion (212, 222) to form the overlap portion (12) of the dash panel assembly and do not overlap each other in the lower portion of the lower dash panel (211) and the upper portion of the upper dash panel (221)
B21B 1/40 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
A first subject of the present invention has an antiviral formulation with metallic copper particles in an unoxidized form and having a median particle diameter inferior or equal to 200 nm, graphene oxide or reduced graphene oxide, and a bonding matrix material. A second subject of the invention has an antiviral filtering material with a layer of textile and at least one layer of an antiviral coating comprising metallic copper particles in an unoxidized form and having a median particle diameter inferior or equal to 200 nm, graphene oxide or reduced graphene oxide, and a bonding matrix into which both metallic copper particles and graphene oxide or reduced graphene oxide are anchored. The invention also concerns methods of preparation of the antiviral formulation and of the antiviral filtering material. Finally, the invention includes an antiviral face mask with a layer of textile coated with the antiviral formulation.
B22F 1/103 - Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
B22F 1/16 - Metallic particles coated with a non-metal
D06M 11/74 - Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with graphitic acids or their salts
D06M 11/83 - Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
D06M 15/263 - Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
D06M 15/564 - Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
D06M 16/00 - Biochemical treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, e.g. enzymatic
The invention relates to sealing lock (5) for a vacuum deposition facility of a coating on a running metal strip following a running path (P), comprising walls (6) and at least three pairs of rolls, inside said walls (6), wherein - each pair of rolls of said at least three pairs of rolls - comprises a roll (7) with a metal surface and a roll (8) with an elastomer surface layer (9), having a thickness from 3 to 30 mm, forming a gap from 1 to 11 mm, - the rolls with an elastomer surface layer of two successive pairs of rolls are on opposite sides of said running path (P).
The invention relates to sealing lock (5) for a vacuum deposition facility of a coating on a running metal strip following a running path (P), comprising walls (6) and at least three pairs of rolls, inside said walls (6), wherein - each pair of rolls of said at least three pairs of rolls - comprises a roll (7) with a metal surface and a roll (8) with an elastomer surface layer (9), having a thickness from 3 to 30 mm, forming a gap from 1 to 11 mm, - the rolls with an elastomer surface layer of two successive pairs of rolls are on opposite sides of said running path (P).
A method for collecting mill scale from a hot rolling mill is provided. The hot rolling mill includes a flume. The method includes transporting mill scale particles in wastewater, retrieving the wastewater from a flume of the hot rolling mill and separating the mill scale particles from the wastewater using a separator. A hot rolling mill and a method for retrofitting a hot rolling mill are also provided.
B01D 21/26 - Separation of sediment aided by centrifugal force
B01D 21/00 - Separation of suspended solid particles from liquids by sedimentation
B01D 21/24 - Feed or discharge mechanisms for settling tanks
B21B 1/26 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length in a continuous process by hot-rolling
C02F 1/00 - Treatment of water, waste water, or sewage
C02F 1/38 - Treatment of water, waste water, or sewage by centrifugal separation
A tin coated steel sheet is provided for manufacturing a drawn can having: a thickness inferior to 0.7 mm, a yield strength inferior to 400 MPa, an average grain aspect ratio below 1.5, a strain hardening coefficient below 1.5, a tin coating from 0.5 to 4.0 g·m−2 on a first face and from 2.8 to 11.2 g·m−2 on a second face, a chemical composition comprising in weight percent 0.002≤C≤0.09 and 0.0015≤B≤0.005 and a balance of Fe and unavoidable impurities, and the steel sheet having a ferritic microstructure with a mean grain size from 5 to 15 μm.
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
C21D 9/46 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
A hot-stamped coated steel part comprising a steel substrate and an aluminum alloy coating comprising, proceeding from steel substrate outwards, an interdiffusion layer and an outer layer, the total thickness of the coating ecoating and the thickness of the interdiffusion layer eIDL satisfy the following condition: 40 ≤ Epc ≤ 80 with (a). The hot-stamped coated steel part comprises an undeformed portion having a thickness ePflat from 0.6 mm to 3.5 mm, and at least one deformed portion. A lineic density of cracks dC in the coating in the undeformed portion is higher than or equal to a minimum lineic density of cracks dCmin(ePflat) defined as: (b)
A low density cold rolled and annealed steel sheet having 0.12%≤carbon≤0.25%, 3%≤manganese≤10%, 3.5%≤aluminum≤6.5%, 0%≤phosphorus≤0.1%, 0%≤sulfur≤0.03%, 0%≤nitrogen≤0.1%, 0%≤silicon≤2%, 0.01%≤niobium≤0.03%, 0.01%≤titanium≤0.2%, 0%≤molybdenum≤0.5%, 0%≤chromium≤0.6%, 0.01%≤copper≤2.0%, 0.01%≤nickel≤3.0%, 0%≤calcium≤0.005%, 0%≤boron≤0.01%, 0%≤Magnesium≤0.005%, 0%≤Zirconium≤0.005%, 0%≤Cerium≤0.1%, and the balance including iron, the steel sheet having a microstructure comprising 60% to 90% Delta ferrite, 8% to 30% of residual austenite having average grain size between 0.6 and 2 microns, 1.0% to 10% of alpha-ferrite having average grain size between 0.6 and 2 microns and 0% to 2% of kappa precipitates (Fe,Mn)3AlCx, where x is strictly lower than 1.
A martensitic steel sheet comprising the following elements 0.07% ≦ C ≦ 0.12%; 1.9% ≦ Mn ≦ 2.5 %; 0.2% ≦ Si ≦ 0.6%; 0.01% ≦ Al ≦ 0.1%; 0.1% ≦ Cr ≦ 0.5%; 0.2% ≦ Mo ≦ 0.6%; 0% ≦ S ≦ 0.09%; 0% ≦ P ≦ 0.09%; 0% ≦ N ≦ 0.09%; 0.001% ≦ Ti ≦ 0.1%; 0.0005% ≦ B ≦ 0.005%; 0% ≦ Nb ≦ 0.1%; 0% ≦ V≦ 0.1%; 0% ≦ Ni ≦ 1%; 0% ≦ Cu ≦ 1%; 0% ≦Sn≦ 0.1%; 0% ≦ Pb≦ 0.1%; 0% ≦ Sb≦ 0.1%; 0.001% ≦ Ca≦ 0.01%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel consisting of, by area percentage, Tempered martensite from 80 % to 94% and Fresh martensite from 6% to 20%.
A hot-stamped coated steel part comprising a steel substrate and an aluminum alloy coating comprising, proceeding from steel substrate outwards, an interdiffusion layer and an outer layer, the total thickness of the coating ecoating and the thickness of the interdiffusion layer eIDL satisfying the following condition: 16 ≤ Epc < 40 with (a). The hot-stamped coated steel part comprises an undeformed portion having a thickness ePflat from 0.6 mm to 3.5 mm, and at least one deformed portion. A lineic density of cracks dC in the coating in the undeformed portion is higher than or equal to a minimum lineic density of cracks dCmin(ePflat) defined as: (b)
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 1/042 - Hydrogen or oxygen by electrolysis of water by electrolysis of steam
C25B 9/73 - Assemblies comprising two or more cells of the filter-press type
F27B 3/26 - Arrangements of heat-exchange apparatus
F27B 9/06 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity electrically heated
F27D 17/00 - Arrangement for using waste heat; Arrangement for using, or disposing of, waste gases
F27D 99/00 - Subject matter not provided for in other groups of this subclass
37.
STEEL SHEET WITH VARIABLE THICKNESS HAVING A REDUCED RISK OF DELAYED FRACTURE AFTER PRESS HARDENING, A PRESS HARDENING METHOD, A PRESS HARDENED COATED STEEL PART
A coated steel sheet with variable thickness in the rolling direction, having at least one portion rolled at a rolling ratio from 1 to 60%, wherein the coating comprises zinc, silicon, magnesium, up to 3.0% of iron, optional elements chosen from Ni, Zr, Hf, Sr, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, or Bi, the content by weight of each element being less than 0.3%, optionally up to 100 ppm of calcium, and unavoidable impurities up to 0.02 %, the balance being aluminum.
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
B21B 1/38 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets
B21D 22/02 - Stamping using rigid devices or tools
C22C 21/10 - Alloys based on aluminium with zinc as the next major constituent
C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
C22C 21/06 - Alloys based on aluminium with magnesium as the next major constituent
The aim of the present invention is to provide a coated steel sheet providing cathodic protection and suitable for manufacturing a press hardened part with good powdering resistance during press-hardening and good corrosion performance. The present invention relates to a method for the manufacture of hardened parts starting from a steel sheet coated with a metallic coating. The part has good characteristics with respect to corrosion and powdering resistance. The invention is particularly well suited for the manufacture of automotive vehicles.
A steel sheet, coated with a metallic coating comprising, by weight percent, from 7.5 to 9.0 % of zinc, from 1.1 to 4.0 % of silicon, from 1.1 to 8.0 % of magnesium, up to 3.0% of iron, optional elements chosen from Pb, Ni, Zr, or Hf, the content by weight of each element being less than 0.3%, optionally up to 100 ppm of Calcium and unavoidable impurities up to 0.02 %, the balance being aluminum, and wherein the coating weight of said metallic coating is from 50 to 500 g/m² for the sum of both sides of said steel sheet.
C25B 1/04 - Hydrogen or oxygen by electrolysis of water
C25B 1/042 - Hydrogen or oxygen by electrolysis of water by electrolysis of steam
C25B 9/73 - Assemblies comprising two or more cells of the filter-press type
F27B 3/26 - Arrangements of heat-exchange apparatus
F27B 9/06 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity electrically heated
F27D 17/00 - Arrangement for using waste heat; Arrangement for using, or disposing of, waste gases
F27D 99/00 - Subject matter not provided for in other groups of this subclass
41.
STEEL SHEET WITH VARIABLE THICKNESS HAVING A REDUCED RISK OF DELAYED FRACTURE AFTER PRESS HARDENING AND METHOD FOR MANUFACTURING THE SAME
A coated steel sheet with variable thickness in the rolling direction, having one portion rolled at a rolling ratio from 1 to 60% and at least another portion rolled at a different rolling ratio, wherein the coating comprises zinc, silicon, magnesium, up to 3.0 wt % of iron, optional elements chosen from Ni, Zr, Hf, Sr, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, or Bi, the content by weight of each of the optional element being less than 0.3 wt %, optionally up to 100 ppm of calcium, and unavoidable impurities up to 0.02 wt %, the balance being aluminum, said coating having a coating weight from 50 to 500g/m² for the sum of both sides before flexible rolling.
C21D 8/00 - Modifying the physical properties by deformation combined with, or followed by, heat treatment
C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
C21D 8/04 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
B32B 15/01 - Layered products essentially comprising metal all layers being exclusively metallic
C22C 38/18 - Ferrous alloys, e.g. steel alloys containing chromium
C22C 38/28 - Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
C22C 38/32 - Ferrous alloys, e.g. steel alloys containing chromium with boron
C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
C23C 28/00 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and
B21D 22/02 - Stamping using rigid devices or tools
B21D 35/00 - Combined processes according to methods covered by groups
42.
METHODS FOR PREPARATION OF SHEETS TO BE USED FOR FABRICATION OF A WELDED STEEL BLANK AND FABRICATING A WELDED BLANK
A method for the preparation of steel sheets for fabricating a welded steel blank is provided. The method includes a step of removing at least part of the first and second metal alloy layers in first and second peripheral zones of pre-coated steel first and second sheets, respectively, by simultaneously ablating the first and second precoatings in the first and second peripheral zones of the pre-coated steel first and second sheets to define first and second ablation zones, the first and second peripheral zones being zones of the first and second principal faces closest to the median plane and located on either side of the median plane.
B23K 26/322 - Bonding taking account of the properties of the material involved involving coated metal parts
B23K 26/348 - Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups , e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
B23K 9/173 - Arc welding or cutting making use of shielding gas and of consumable electrode
B23K 26/211 - Bonding by welding with interposition of special material to facilitate connection of the parts
B23K 9/167 - Arc welding or cutting making use of shielding gas and of a non-consumable electrode
B23K 26/40 - Removing material taking account of the properties of the material involved
B23K 26/361 - Removing material for deburring or mechanical trimming
B23K 28/02 - Combined welding or cutting procedures or apparatus
B23K 26/32 - Bonding taking account of the properties of the material involved
43.
STEEL SHEET HAVING EXCELLENT CORROSION PROPERTIES AFTER PRESS HARDENING AND METHOD FOR MANUFACTURING THE SAME
A steel sheet, coated with a metallic coating comprising, by weight percent, from 6.0 to 10.0 % of zinc, from 1.1 to 4.0 % of silicon, from 1.1 to 8.0 % of magnesium, up to 3.0% of iron, optional elements chosen from Pb, Ni, Zr, or Hf, the content by weight of each element being less than 0.3%, optionally up to 100 ppm of Calcium and unavoidable impurities up to 0.02 %, the balance being aluminum.
The aim of the present invention is to provide a coated steel sheet providing cathodic protection and suitable for manufacturing a press hardened part with good powdering resistance during press-hardening and good corrosion performance. The present invention relates to a method for the manufacture of hardened parts starting from a steel sheet coated with a metallic coating. The part has good characteristics with respect to corrosion and powdering resistance. The invention is particularly well suited for the manufacture of automotive vehicles.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
09 - Scientific and electric apparatus and instruments
12 - Land, air and water vehicles; parts of land vehicles
19 - Non-metallic building materials
37 - Construction and mining; installation and repair services
38 - Telecommunications services
39 - Transport, packaging, storage and travel services
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
Common metals and their alloys; Steel, unwrought or semi-wrought, including the following products: Stainless steel, Carbon steels, Stainless steel, Galvanized Steel, Electro-galvanized steel, prelacquered steel; Cast iron, unwrought or semi-wrought; Scrap metal (scrap iron); Tinplate, Iron produced through direct reduction and direct-reduced iron; metal ores, including crude or prepared ores; Metal materials for construction; Shaped metal sections, Sheet piles and joists of metal; Reinforcing materials, of metal, for concrete; Metal facing panels for construction; Floors of metal, Floor tiles, of metal, Partitions of metal, Metal multi-layered panels, Metal cladding, Cladding and roofing of metal for construction, Tiles of metal; Buildings, transportable, of metal, including the following products: Shelters of metal; Materials of metal for railway tracks, including rails and parts therefor; Non-electric cables and wires of common metal, including soldering wire of metal and barbed wire; Pipes and tubes of metal; Metal hardware; Grilles of metal; Fencing of metal, coated or uncoated latticework and wire cloth of metal (building materials); Metal springs; Sheets and plates of metal, Sheet metal sandwich panels and multi-layered goods of metal, not included in other classes; Armour; Frameworks of metal; Tanks and containers of metal; Boxes made of metal, not included in other classes; Tins of metal and lids of metal therefor, including the following products: Drink boxes; Packaging of common metal and of tinplate; Foundry moulds of metal; Bars, Sheets, plates, Foil, Skelps, Discs, Coils, Profiled bands, Poles, Beams, Strips, Ingots and Forging ingots; Balls of steel; Iron slabs; Metal forgings, Metal mouldings, Cast, moulded, stamped, machined parts of metal or Welded metal parts, The aforesaid goods being for use in all industries. Machines and machine tools, Namely rolling mills; (parts of machines), namely: Rolling mill cylinders; Continuous metal casting machines, Cutting machines, Machines for shaping, flame cutting, machining, welding, planing and embossing metals, sheet metal and plates of metal; Parts of metal for vehicle engines, not included in other classes; Machine coupling and transmission components (except for land vehicles). Scientific, weighing, measuring, signalling, checking, teaching and instructional apparatus and instruments; Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; Apparatus for recording, transmission or reproduction of sound or images; Optical and magnetic image and sound recording media; Compact discs; Apparatus and instruments for measuring, checking, analysis and supervision of the quality of materials and in particular of metallurgical goods and steels; Data processing equipment; Software; Multimedia training apparatus; Magnetic and optical media, media for images and sound; Solar panels and photovoltaic panels. Vehicles for use on land, Marine vehicles, Watercraft and apparatus for locomotion by land, sea or water; Parts of metal for vehicles, not included in other classes; Bodywork and bodywork parts; Bumpers, bonnets, suspensions for land vehicles, sleepers, chassis, wheels, axles of metal, front and rear vehicle trains, and motors and engines, all for land vehicles. Building materials (non-metallic), including slabs, plates, sidings, flooring, coverings, cladding, sandwich panels, profile sections, multilayer panels and partitions; Reinforcing materials, not of metal, for building; Non-metallic transportable buildings, including shelters and parts of shelters not of metal; Rigid pipes, not of metal; Monuments, not of metal. Building consultancy, Also in relation to the following fields: Selection and use of steels. Providing access to websites on the Internet. Distribution [transport] of goods; Merchandise packaging; Storage and warehousing of goods. Treatment of materials, namely Treatment of metal, Treatment of alloys and Treatment of steel; Treatment of minerals, steel, common metals and their alloys; Metal treating and Any mechanical, thermo-mechanical or chemical transformation of properties and characteristics of metals, including the following services: Direct reduction of iron, Metal tempering, Working of metal surfaces, Soldering, Casting, anodizing, Chromium plating, Crushing, Machining, Tin plating, Galvanization, Nickel plating, Laminating, Armour plating, Cutting, Polishing, Magnetization, Plating, Stamping, Stripping finishes and Welding; Recycling of metal goods; Treatment of materials in the course of the process of manufacturing goods of metal, such as forging, pressing, de-burring, machining, laminating and forming of metals; Vacuum treatment; Nitriding (treatment of materials), Assembly of sections of metal, for others; Treatment of boiler materials. Scientific and technological services, and research and design relating thereto; Industrial analysis and research services; Software design and development; Consultancy and information relating to the aforesaid services, including in the context of customer service; Material testing and mechanical research, and consultancy and information relating thereto; Conducting technical project studies; Technical and scientific advice and information to improve the quality of goods and services, in relation to the following fields: meta, Steel and Applications of metal and steel namely Quality control; Surveying and engineering in the field of metals, steels and their applications; Engineering in the field of steel and its applications; Construction drafting; Design, creation and development of computer software, in particular for metallurgy; Design of computer software for global solutions for building.
46.
COLD ROLLED AND HEAT TREATED STEEL SHEET AND A METHOD OF MANUFACTURING THEREOF
A cold rolled and heat treated steel sheet having a composition including the following elements: 0.1%≤Carbon≤0.5%, 1%≤Maganeses≤3.4%, 0.5%≤Silicon≤2.5%, 0.01%≤Aluminum≤1.5%, 0.05%≤Chromium≤1%, 0.001%≤Niobium≤0.1%, 0%≤Sulfur≤0.003%, 0.002%≤Phosphorus≤0.02%, 0%≤Nitrogen≤0.01%, 0%≤Molybdenum≤0.5%, 0.001%≤Titanium≤0.1%, 0.01%≤Coppers≤2%, 0.01%≤Nickel≤3%, 0.0001%≤Calcium≤0.005%, 0%≤Vanadium≤0.1%, 0%≤Boron≤0.003%, 0%≤Ceriurm≤0.1%, 0%≤Magnesium≤0.010%, 0%≤Zirconium≤0.010% the remainder composition being composed of iron and the unavoidable impurities, and a microstructure of the rolled steel sheet includes by area fraction, 10% to 60% Bainite, 5% to 50% Ferrite, 5% to 25% Residual Austenite, Martensite 2% to 20%, Tempered Martensite 0% to 25%, the balance being Annealed Martensite, which content shall be from 1% to 45%.
A process for manufacturing a press hardened laser welded steel part, includes providing at least one first steel sheet with a composition containing, by weight 0.062≤C≤0.095%, the at least one first steel sheet precoated with a metallic precoating of aluminum, or aluminum-based alloy, or aluminum alloy.
providing at least one second steel sheet with a composition containing, by weight, from to 0.38% of carbon, the at least one second steel sheet precoated with a metallic precoating of aluminum, or aluminum-based alloy, or aluminum alloy;
removing a portion of a thickness of the aluminum precoating at upper and lower sides along one side of a periphery of the at least one first steel sheet and the at least one second steel sheet;
creating a welded blank by laser welding the at least one first steel sheet and the at least one second steel sheet, such that an aluminum content in a weld metal is lower than 0.3% by weight, the laser welding being performed along the periphery wherein the portion of the thickness of the aluminum precoating has been removed;
heating the welded blank and holding the welded blank at a temperature Tm between 890 and 950° C., a holding duration Dm at the temperature being between 1 and 10 minutes, so as to obtain a heated welded blank;
transferring the heated welded blank within a forming press, the transfer duration Dt being less than 10 s;
hot forming the heated welded blank in the forming press so as to obtain a welded formed part; and
cooling the welded formed part at a first cooling rate CR1 between 40 and 360° C./s in a temperature range between 750 and 450° C., and at a second cooling rate CR2 between 15 to 150° C./s in a temperature range between 450° C. and 250° C., wherein CR2
B21B 1/22 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling bands or sheets of indefinite length
A method for producing a press hardened part of coated steel comprising the following steps: A) Supplying a steel sheet having a thickness from 0.5 to 2.5 mm, B) Coating said steel sheet by hot dipping into a liquid metallic bath containing by weight, 8 to 12 % of Silicon, up to 3 % Iron, and unavoidable impurities up to 0.1 %, the balance being Aluminum, wherein said coating thickness ranges from 10 to 20 µm per side of said steel sheet C) Temper rolling the coated steel sheet at a elongation rate from 0.1 to 1.2 %, the elongation being defined by the speed difference between the material in and the material out of the temper rolling stand, D) Cutting said coated, temper rolled steel sheet to obtain a blank, E) Heating said blank at a temperature from 800 to 970°C, to obtain a fully austenitic microstructure in the steel, F) Transferring the blank into a press tool, G) Press hardening of said blank to obtain a press-hardened part.
The invention deals with a method for manufacturing molten pig iron into an electrical smelting furnace 13, said method comprising the following successive steps: - providing a directly reduced iron product 12, - providing a carbon containing material 30, - feeding at least a part of the smelting furnace with the DRI product 12 in alternance with the carbon containing material 30, - melting the DRI Product 12 and the carbon containing material 30 to produce molten pig iron 14. It also deals with the manufacturing of steel from said pig iron.
The invention deals with a method for manufacturing molten pig iron into an electrical smelting furnace 13, said method comprising the following successive steps: - providing a directly reduced iron product 12, - providing a carbon and iron containing material 30, - feeding at least a part of the smelting furnace with the DRI product 12 in alternance with the carbon and iron containing material 30, - melting the DRI Product 12 and the carbon and iron containing material 30 to produce molten pig iron 14. It also deals with the manufacturing of steel from said pig iron.
The invention deals with a method for manufacturing pig iron in an electrical smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − injecting a desulphurizing reagent directly in said pig iron layer 14. It also deals with the manufacturing of steel from said pig iron and to the associated electrical smelting furnace 13.
F27D 3/18 - Charging particulate material using a fluid carrier
F27B 3/10 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces - Details, accessories, or equipment, e.g. dust-collectors, peculiar to hearth-type furnaces
F27B 3/19 - Arrangement of devices for discharging
F27D 3/14 - Charging or discharging liquid or molten material
52.
A METHOD FOR MANUFACTURING PIG IRON IN AN ELECTRICAL SMELTING FURNACE AND ASSOCIATED ELECTRICAL SMELTING FURNACE
The invention deals with a method for manufacturing pig iron in an electrical smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − injecting a desulphurizing reagent directly in said pig iron layer 14. It also deals with the manufacturing of steel from said pig iron and with the associated electrical smelting furnace.
F27D 3/18 - Charging particulate material using a fluid carrier
F27B 3/10 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces - Details, accessories, or equipment, e.g. dust-collectors, peculiar to hearth-type furnaces
F27B 3/19 - Arrangement of devices for discharging
F27D 3/14 - Charging or discharging liquid or molten material
53.
A METHOD FOR MANUFACTURING PIG IRON IN AN ELECTRICAL SMELTING FURNACE AND ASSOCIATED ELECTRICAL SMELTING FURNACE
The invention deals with a method for manufacturing pig iron in an electrical smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − injecting a carbon containing material directly in said pig iron layer 14. It also deals with the manufacturing of steel from said pig iron and to the associated electrical smelting furnace 13.
The invention deals with a method for manufacturing pig iron in a smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − transferring said pig iron 14 to said desulphurization station 15 and − injecting a silicon containing material in said pig iron 14 in desulphurization station 15. It also deals with the manufacturing of steel from said pig iron.
The invention deals with a method of manufacturing molten pig iron into an electrical smelting unit. The method comprises the following successive steps: - providing a directly reduced iron product 12, - feeding the DRI product 12 into the smelting unit 13, - feeding together with the DRI product 13, ferrous scrap having a size lower than 80mm, - melting the DRI product 13 and the ferrous scrap to produce molten pig iron. The invention also deals with a method to produce liquid steel from manufactured pig iron.
The invention deals with a method for manufacturing pig iron in a smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − injecting a carbon containing material directly in said pig iron layer 14. It also deals with the manufacturing of steel from said pig iron and to an associated electrical smelting furnace 13.
The invention deals with a method for manufacturing pig iron in a smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − injecting a carbon containing material directly in said pig iron layer 14. It also deals with the manufacturing of steel from said pig iron and to the associated electrical smelting furnace.
An automobile, wherein at least one outer skin part or one semi-visible part is made of coated press hardened steel, the coating of said steel before heating and press hardening containing by weight, 8 to 12 % of Silicon, up to 3 % Iron, and unavoidable impurities up to 0.1 %, the balance being Aluminum, and wherein said coating has a thickness from 10 to 20 μm per side.
An automobile, wherein at least one outer skin part or at least one semi- visible part is made of coated press hardened steel, the coating of said steel before heating and press hardening containing by weight, 8 to 12 % of Silicon, up to 3 % Iron, and unavoidable impurities up to 0.1 %, the balance being Aluminum, and wherein said coating has a thickness from 20 to 40 μm per side.
A method of casting a steel semi-product wherein a liquid steel is poured from a ladle to a tundish through a shroud including the steps of determining the light intensity emitted from the surface of the liquid steel in the tundish, detecting, based on said determined intensity, the presence of an open-eye at the surface of the liquid steel and emitting an alert towards an operator when an open-eye is detected.
A method for producing a press hardened part of coated steel comprising the following steps: A) Supplying a steel sheet having a thickness from 0.5 to 2.5 mm, B) Coating said steel sheet by hot dipping into a liquid metallic bath containing by weight, 8 to 12 % of Silicon, up to 3 % Iron, and unavoidable impurities up to 0.1 %, the balance being Aluminum, wherein said coating thickness from 20 to 40 µm per side of said steel sheet, C) Temper rolling the coated steel sheet at an elongation rate from 0.1 to 1.2 %, the elongation rate being defined by the speed difference between the material in and the material out of the temper rolling stand, D) Cutting said coated, temper rolled steel sheet to obtain a blank, E) Heating said blank at a temperature from 800 to 970°C, to obtain a fully austenitic microstructure in the steel, F) Transferring the blank into a press tool, G) Press hardening of the part obtained at step by cooling to obtain a press-hardened part.
The invention deals with a method for manufacturing pig iron in an electrical smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: - loading DRI product in said vessel 20 - melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and - tapping said pig iron 14 into a ladle and - adding a silicon containing material directly in said pig iron 14 in the runner of at least one of said smelting furnace tap holes 25. It also deals with the manufacturing of steel from said pig iron and to the associated electrical smelting furnace.
F27D 3/18 - Charging particulate material using a fluid carrier
F27B 3/10 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces - Details, accessories, or equipment, e.g. dust-collectors, peculiar to hearth-type furnaces
F27B 3/19 - Arrangement of devices for discharging
F27D 3/14 - Charging or discharging liquid or molten material
63.
A METHOD FOR MANUFACTURING PIG IRON IN AN ELECTRICAL SMELTING FURNACE AND ASSOCIATED FURNACE
The invention deals with a method for manufacturing pig iron in a smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − injecting a desulphurizing reagent directly in said pig iron layer 14. It also deals with the manufacturing of steel from said pig iron and to the associated electrical smelting furnace.
The invention deals with a method for manufacturing pig iron in an electrical smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − tapping said pig iron 14 into a ladle and − adding a carbon containing material directly in said pig iron 14 in the runner 26 of at least one of said smelting furnace tap holes 25. It also deals with the manufacturing of steel from said pig iron and with the associated electrical smelting furnace 13.
F27D 3/18 - Charging particulate material using a fluid carrier
F27B 3/10 - Hearth-type furnaces, e.g. of reverberatory type; Electric arc furnaces - Details, accessories, or equipment, e.g. dust-collectors, peculiar to hearth-type furnaces
F27B 3/19 - Arrangement of devices for discharging
F27D 3/14 - Charging or discharging liquid or molten material
F27D 3/15 - Tapping equipment; Equipment for removing slag
65.
METHOD FOR MANUFACTURING PIG IRON IN A PRODUCTION LINE COMPRISING AN ELECTRICAL SMELTING FURNACE
The invention deals with a method for manufacturing pig iron in an electrical smelting furnace 13 comprising a vessel 20, said method comprising the following successive steps: − loading DRI product in said vessel 20 − melting said DRI product to form a pig iron layer 14 topped by a slag layer 23 and − transferring said pig iron 14 to said desulphurization station 15 and − injecting a carbon containing material in said pig iron 14 in desulphurization station 15. It also deals with the manufacturing of steel from said pig iron.
The invention deals with a method of manufacturing molten pig iron into an electrical smelting unit 13. The method comprises the following successive steps: - providing a directly reduced iron product 12, - feeding the DRI product 12 into the smelting unit 13, - feeding together with the DRI product 13 at least one steel or ironmaking by-product-based material having an iron content upper than 20% in weight, at least a part of said iron being under an oxidized form, - melting the DRI product 13 and the at least one steel or ironmaking by-product-based material to produce molten pig iron. The invention also deals with a steel manufacturing method using said pig iron.
The invention deals with a method of manufacturing molten pig iron into an electrical smelting unit 13. The method comprises the following successive steps: - providing a directly reduced iron product 12, - feeding the DRI product 12 into the smelting unit 13, - feeding together with the DRI product 13 at least one steel or ironmaking by-product-based material comprising at least 10% in weight of slag forming agents, - melting the DRI product 13 and the at least one steel or ironmaking by-product-based material to produce molten pig iron. The invention also deals with a steel manufacturing method using said pig iron.
The invention deals with a method of manufacturing molten pig iron into an electrical smelting unit 13. The method comprises the following successive steps: - providing a directly reduced iron product 12, - feeding the DRI product 12 into the smelting unit 13, - feeding together with the DRI product 13 at least one steel or ironmaking by-product-based material having an iron content upper than 20% in weight, at least a part of said iron being under an oxidized form, - melting the DRI product 13 and the at least one steel or ironmaking by- product-based material to produce molten pig iron. The invention also deals with a steel manufacturing method using said pig iron.
A method for the manufacture of a steel sheet, in a device including a pre-heating section, a heating section having a maximal heating rate and a soaking section including a calibrating step, a recrystallization annealing and a soaking and a coating step. The calibration step permits to define a lower dew point permitting to achieve a predefined quality target.
A process for welding at least two steel sheets comprising the following successive steps: providing at least one steel sheet having a composition comprising the following elements, expressed by weight percent: 0.01% ≤ C ≤ 0.2%, 2.5% ≤ Ti ≤ 10 %, (0.45 xTi) – 1.35% ≤ B ≤ (0.45 xTi) + 0.70%, S ≤ 0.03%, P ≤ 0.04%, N ≤ 0.05%, O ≤ 0.05% and comprising precipitates of TiB2, the balance being Fe and unavoidable impurities resulting from the elaboration, providing a second steel sheet, welding the first steel sheet and the second steel sheet by using a filler wire, said filler wire having composition, comprising Ti: 0.8 – 2 wt% to obtain a molten zone having an average content of free titanium Ti* above or equal to 0.60 wt%.
Side structure (1) for a motor vehicle (3) including an inner and outer frame (11, 13) each forming a closed ring and having two openings corresponding to the front and rear doors (8, 10), wherein the inner and outer frames (11, 13) are each formed by hot stamping respectively an inner and an outer frame blank (111, 113), each being a single tailor welded blank made of steel and wherein the inner and outer frames (11,13) are assembled to form a hollow volume (7) between them.
A method for manufacturing a thermally treated steel sheet is described. The method includes:
A. preparation step containing:
1) a selection substep, wherein:
a. mtarget and a chemical composition are compared to a list of predefined products, whose microstructure contains predefined phases and predefined proportion of phases, and a product having a microstructure mstandard closest to mtarget and TPstandard is selected, including at least a heating, a soaking and a cooling steps, to obtain mstandard,
b. a heating path, a soaking path including a soaking temperature Tsoaking, a power cooling of the cooling system and a cooling temperature Tcooling are selected based on TPstandard and
2) a calculation substep, wherein through variation of the cooling power, new cooling paths CPx are calculated based on the product selected in step A.1)a and TPstandard, the initial microstructure mi of the steel sheet to reach mtarget, the heating path, the soaking path comprising Tsoaking and Tcooling, the cooling step of TPstandard is recalculated using said CPx in order to obtain new thermal paths TPx, each TPx corresponding to a microstructure mx,
3) a selection substep wherein one TPtarget to reach mtarget is selected, TPtarget being chosen among the calculated thermal paths TPx and being selected such that mx is the closest to mtarget, and
B. a thermal treatment step wherein TPtarget is performed on the steel sheet.
A method for the manufacture of a self-standing graphene oxide or reduced graphene oxide film having a thickness between 0.4 and 4.0 μm, including the successive steps of A) preparing an aqueous dispersion including 0.1 to 30 g·L−1 of graphene oxide or reduced graphene oxide, B) depositing the aqueous dispersion on a flat substrate coated with a polymeric film dissolvable in organic solvents and unsolvable in water, so as to form a wet film having a thickness comprised between 1 μm and 3.5 mm, C) drying the wet film, D) separating the polymeric film from the flat substrate, E) placing the polymeric film in a support frame, F) showering the polymeric film with an organic solvent to dissolve the polymeric film, G) separating the graphene oxide or reduced graphene oxide film from the frame to obtain the self-standing graphene oxide or reduced graphene oxide film.
A steel part for the transmission system of an automobile comprising of the following elements, 0.2%≦C≦0.35%; 1.0%≦Mn≦1.6%; 0.2%≦Si≦0.7%; 0.001%≦Al≦0.1%; 0.01%≦Mo≦0.5%; 0.020%≦Nb≦0.06%; 1%≦Cr≦1.5%; 0≦P≦ 0.09%; 0≦S≦0.09%; 0.009%≦N≦0.09%; 0%≦Ni≦1%; 0%≦V≦0.2%; 0%≦Ti≦0.1%; 0%≦Cu≦1%; 0%≦B ≦0.008%; 0%≦Sn≦0.1%; 0%≦Ce≦0.1%; 0%≦Mg≦0.10%; 0%≦Zr≦0.10%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of the core of said steel part comprising, by area percentage, at least 90% of Bainite, with a cumulative optional presence of any one or more from Residual Austenite, Pearlite, ferrite or martensite from 0% and 10% and precipitates of Aluminum and Niobium in form of AlN and Nb (C,N), such steel part having a martensiteenriched layer till the depth of 1mm or less on all surfaces of said steel part, such martensiteenriched layer comprising from 85% to 95% of martensite, the remainder being any one or more from bainite, residual austenite, ferrite or cementite.
C21D 9/28 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
C21D 9/32 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
C21D 7/13 - Modifying the physical properties of iron or steel by deformation by hot working
76.
STEEL FOR RAILS AND A METHOD OF MANUFACTURING OF A RAIL THEREOF
A steel for rail having the following elements, 0.25%≤C≤0.8%; 1.0%≤Mn≤2.0%; 1.40%≤Si≤2%; 0.01%≤Al≤1%; 0.8%≤Cr≤2%; 0≤P≤0.09%; 0≤S≤0.09%; 0%≤N≤0.09%; 0%≤Ni≤1%; 0%≤Mo≤0.5%; 0%≤V≤0.2%; 0%≤Nb ≤0.1%; 0%≤Ti≤0.1%; 0%≤Cu≤0.5%; 0%≤B≤0.008%; 0%≤Sn≤0.1%; 0% ≤Ce≤0.1%; 0%≤Mg≤0.10%; 0%≤Zr≤0.10%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure having, by area percentage, 2% to 10% of Proeutectoid Ferrite, the balance being made of Pearlite wherein the pearlite having interlamellar spacing from 100 nm to 250 nm .
A scrap inventory management method allowing to have a better control of scrap stocks. The method includes a calculation step of at least one combination of an action to be performed and an associated quantity for a given scrap based on characteristics of the liquid steel to be produced and on scrap properties.
Rear underfloor structure (2) for a motor vehicle (1) including a first and a second side member (4) and at least one cross member (5) linking the first and second side members (4), wherein the rear underfloor structure (2) is made by stamping a single tailor welded blank (26) comprising at least two sub-blanks.
A trimming device for metallic sheets including: an upper knife, comprising a central circular face having a diameter D1 and a thickness T1, mounted on an upper shaft, a lower knife, comprising a central circular face having a diameter D2 and a thickness T2, mounted on a lower shaft, wherein said upper knife and said lower knife are vertically shifted with an overlap (DOVERLAP) so as to define a shear of said metallic sheet and wherein at least one of said upper or lower shaft is able to be moved vertically, a first distance sensor, able to measure a vertical distance to the upper end of said upper knife, a second distance sensor, able to measure a vertical distance to the lower end of said lower knife, a computer able to compute the overlap.
Laser cutting process to produce n trimmed sub-blanks, n being an integer strictly greater than 1, from a mother blank made of metallic material, having the following steps: Op1/ positioning the mother blank on a cutting table having n laths arranged to be moveable relative to one another in a transverse direction, Op2/ clamping at least part of the mother blank to the cutting table, Op3/ cutting, using a laser source, n untrimmed sub-blanks from the mother blank in a longitudinal cutting direction, Op4/ separating the n laths of the cutting table from one another in a transverse direction, Op5/ releasing the clamping, Op6/ clamping the n untrimmed sub-blanks to the n laths, Op7/ laser trimming the n untrimmed sub-blanks in order to form n trimmed sub-blanks, Op8/ releasing the clamping, Op9/ discharging the n trimmed sub-blanks from the cutting table.
B23K 26/38 - Removing material by boring or cutting
B23K 37/04 - Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the other main groups of this subclass for holding or positioning work
81.
HIGH STRENGTH AND HIGH FORMABILITY STEEL SHEET AND MANUFACTURING METHOD
A cold-rolled and heat-treated steel sheet, has a composition comprising, by weight percent: n0.10%≤C≤0.25%, 3.5%≤Mn≤6.0%, 0.5%≤Si≤2.0%, 0.3%≤Al≤1.2%, with Si+Al≥0.8%, 0.10%≤Mo≤0.50%, S≤0.010%, P≤0.020%, N≤0.008%. The cold-rolled steel sheet has a microstructure consisting of, in surface fraction: between 10% and 45% of ferrite, having an average grain size of at most 1.3 μm, the product of the surface fraction of ferrite by the average grain size of the ferrite being of at most 35 μm %, between 8% and 30% of retained austenite, the retained austenite having an Mn content higher than 1.1*Mn %, Mn % designating the Mn content of the steel, at most 8% of fresh martensite, at most 2.5% of cementite and partitioned martensite.
It is a first purpose of the current invention to provide a computerized method to determine the best nesting of blanks in a strip in order to optimize the material usage and to determine the associated material usage. Solving the problem of material usage optimization involves at least three different variables (two rotation angles of the blanks and one transversal offset) and thus potentially involves optimizing the material usage function over a very large set of combinations. This leads to high computation times, which can be a serious hindrance to the implementation of the material usage optimization method. A second purpose of the current invention is therefore to provide a computerized method to accelerate the computerized determination of the best blank nesting for material usage optimization and the associated material usage.
G05B 19/4097 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
83.
METHOD TO OPTIMIZE THE NESTING OF TWO BLANKS WITHIN A LONGITUDINALLY EXTENDING FLAT STRIP
It is a first purpose of the current invention to provide a computerized method to determine the best nesting of blanks in a strip in order to optimize the material usage and to determine the associated material usage. Solving the problem of material usage optimization involves at least three different variables (two rotation angles of the blanks and one transversal offset) and thus potentially involves optimizing the material usage function over a very large set of combinations. This leads to high computation times, which can be a serious hindrance to the implementation of the material usage optimization method. A second purpose of the current invention is therefore to provide a computerized method to accelerate the computerized determination of the best blank nesting for material usage optimization and the associated material usage.
G05B 19/4097 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
B21D 28/06 - Making more than one part out of the same blank; Scrapless working
A binder for extruded, pelletized, briquetted, or agglomerated material, said binder comprising from 80% to 90% in weight of a pyrolysis oil resulting from the pyrolysis of biomass and from 10% to 20% in weight of thermoplastics.
C10L 5/44 - Solid fuels essentially based on materials of non-mineral origin on vegetable substances
C10B 53/02 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
C22B 1/244 - Binding; Briquetting with binders organic
85.
DEVICE AND METHOD FOR COOLING ROLLS USED FOR ROLLING IN A HIGHLY TURBULENT ENVIRONMENT
The invention relates to a rolling stand for metallic products comprising - at least one pair of work rolls, - at least a pair of back-up rolls, - at least one water pillow cooling device able to project a plurality of cooling jets under pressure on at least one of said work roll, - a removable plate - placed between said cooling device and said work roll, - being concave and curved with a curvature such that a gap between said removable plate and said upper work roll is constant or increases when moving in direction of the back-up roll and such that said gap is from 5 to 200 mm, - and being holed such that said cooling jets can pass through said removable plate.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
86.
DEVICE AND METHOD FOR COOLING ROLLS USED FOR ROLLING IN A HIGHLY TURBULENT ENVIRONMENT
The invention relates to a rolling stand for metallic products comprising - at least one pair of work rolls, - at least a pair of back-up rolls, - at least one water pillow cooling device able to project a plurality of cooling jets under pressure on at least one of said work roll, - a removable plate - placed between said cooling device and said work roll, - being concave and curved with a curvature such that a gap between said removable plate and said upper work roll is constant or increases when moving in direction of the back-up roll and such that said gap is from 5 to 200 mm, - and being holed such that said cooling jets can pass through said removable plate.
B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
A binder for extruded, pelletized, briquetted, or agglomerated material, said binder comprising from 80% to 90% in weight of a pyrolysis oil resulting from the pyrolysis of biomass and from 10% to 20% in weight of thermoplastics.
C10L 5/44 - Solid fuels essentially based on materials of non-mineral origin on vegetable substances
C10B 53/02 - Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
C22B 1/244 - Binding; Briquetting with binders organic
88.
METHOD TO AUTOMATICALLY POSITION BLANKS IN A STRIP AND TO CALCULATE THE ASSOCIATED SCRAP RATIO
Method for the computerized positioning of two blanks to be cut out in a longitudinally extending strip comprising the steps of determining the inner dimensions of each blank in the longitudinal direction, determining the distances in the longitudinal direction between the left side of blank A and the right side of blank B and conversely when said blanks are superimposed, and deducting the pitches between two neighbouring blanks A and B and two neighbouring blanks B and A. Method for the computerized scrap ratio calculation using said blank positioning method and method for the computerized calculation of the material cost of the blanking operation using said scrap ratio calculation.
G05B 19/4097 - Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
G06Q 10/04 - Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
89.
A method for manufacturing a steel sheet with a ZnAlMg coating, corresponding coated steel sheet, part and vehicle
A method for manufacturing a steel sheet provided with a coating included from 0.80 to 1.40 wt. % of Al, from 0.80 to 1.40 wt. % of Mg, unavoidable impurities and optionally one or more additional elements selected from Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Zr or Bi, the weight content of each additional element in the coating being less than 0.3%, the remainder being Zn, the outer surface of the coated steel sheet having a waviness Wa0.8 before skin-pass of less than or equal to 0.50 μm; the coated steel sheet obtained by this method; the part obtained by deformation of a steel sheet and a land motor vehicle comprising a body, the body including the part.
A method for producing a welded blank (1) includes providing two precoated sheets (2), butt welding the precoated sheets (2) using a filler wire. The precoating (5) entirely covers at least one face (4) of each sheet (2) at the time of butt welding. The filler wire (20) has a carbon content between 0.01 wt. % and 0.45 wt. %. The composition of the filler wire (20) and the proportion of filler wire (20) added to the weld pool is chosen such that the weld joint (22) has (a) a quenching factor FTWJ: FTWJ−0.9FTBM≥0, where FTBM is a quenching factor of the least hardenable substrate (3), and FTWJ and FTBM are determined: FT=128+1553×C+55×Mn+267×Si+49×Ni+5×Cr−79×Al−2×Ni2−1532×C2−5×Mn2−127×Si2−40×C×Ni−4×Ni×Mn, and (b) a carbon content CWJ<0.15 wt. % or, if CWJ≥0.15 wt. %, a softening factor FAWJ such that FAWJ>5000, where FA=10291+4384.1×Mo+3676.9Si−522.64×Al−2221.2×Cr−118.11×Ni−1565.1×C−246.67×Mn.
B62D 21/15 - Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
A High Manganese hot rolled steel having a composition comprising of the following elements 0.8 % ≤ Carbon ≤ 1.3 %, 9.5 % ≤ Manganese ≤ 22%,0.01% ≤ Silicon ≤ 3%, 0.01% ≤ Aluminum ≤ 3%, 0.03 % ≤ Phosphorus ≤ 0.1%, 0.03 % ≤ Sulfur ≤ 0.1 %, 0 % ≤ Nitrogen ≤ 0.01%, 0% ≤ Niobium ≤ 0.03%, 0% ≤ Titanium ≤ 0.2%, 0% ≤ Chromium ≤ 1.5%, 0% ≤ Molybdenum ≤ 0.5%, 0% ≤ Calcium ≤ 0.005%, 0.01% ≤ Copper ≤ 2%, 0.01% ≤ Nickel ≤ 3%, 0 % ≤ Boron ≤ 0.01%, 0 % ≤ Magnesium ≤ 0.005%, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel consisting in, in area fraction, 95% or more of Austenite, 0% to 5% Carbides wherein the grain size of the grains of Austenite is 15 microns or more.
A method for estimating the oxide thickness and the temperature of a heated steel strip, undergoing a heat treatment performed at a temperature from 100° C. to 1100° C., including the steps of 1. measuring at least two radiation intensities at different wavelengths, in a range from 1 to 5 μm, emitted by the heated steel strip, 2. estimating the temperature of the heated steel strip, TESTIMATED, based on the at least two measured radiation intensities and a reference radiation intensity for at least a reference wavelength, emitted by a reference steel strip having a determined oxide layer thickness, estimating the emissivity coefficient of the heated steel strip, εESTIMATED, using at least one of the measured radiation intensities and the estimated temperature, TESTIMATED, 4. estimating the oxide thickness, OxESTIMATED, of the heated steel strip using the estimated emissivity, εESTIMATED.
G01J 5/00 - Radiation pyrometry, e.g. infrared or optical thermometry
G01B 21/08 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
A martensitic steel sheet comprising of the following elements 0.08 % ≦ C ≦ 0.14 %; 1.95 % ≦ Mn ≦ 2.6 %; 0.1% ≦ Si ≦ 0.8 %;.01% ≦ Al ≦ 0.1 %; 0.001% ≦ Ti ≦ 0.1%; 0.0001% ≦ B ≦ 0.05%; 0% ≦ S ≦ 0.09%; 0% ≦ P ≦ 0.09%; 0% ≦ N ≦ 0.09%; 0.1% ≦ Cr ≦ 1 %; 0% ≦ Ni ≦ 1%; 0% ≦ Cu ≦ 1%; 0% ≦ Mo ≦ 0.4%; 0% ≦ Nb ≦ 0.1%; 0% ≦ V≦ 0.1%; 0% ≦Sn≦ 0.1%; 0% ≦ Pb≦ 0.1%; 0% ≦ Sb≦ 0.1%; 0.001% ≦ Ca≦ 0.01%; the remainder composition being composed of iron and unavoidable impurities, the microstructure of said steel comprising, by area percentage, at least 92% of martensite, a cumulated amount of ferrite and bainite from 1 % to 8%, and an optional amount of residual austenite from 0% to 2%.
A device to inject a reducing gas into a shaft furnace including an external casing whose front face is provided with an outlet for gas injection into the shaft furnace, an internal casing located inside the external casing and made of a steel able to resist to a temperature up to 1200° C., this internal casing having an opening matching the gas injection outlet of the front face of the external casing and a refractory layer located between the external casing and the internal casing.
A blast furnace for ironmaking production wherein iron ore is at least partly reduced by a reducing gas which is injected in the stack of the blast furnace. The blast furnace includes an external and an internal wall, having a thickness Tint, in contact with matters charged into the blast furnace. The thickness Tint of the internal wall is substantially constant above and below the injection area of a reducing gas.
A lance (1) for blowing oxygen onto a bath of molten steel including a tip (15) provided with first oxygen ejector (16) and a distributor (17) provided with second ejector (18).
A blast furnace for ironmaking production wherein iron ore is at least partly reduced by a reducing gas which is injected in the stack of the blast furnace. The blast furnace includes an external wall, an internal wall in contact with matters charged into the blast furnace, the internal wall including several rows of staves having a parallelepipedal shape. At least one row of staves comprises staves with a hole drilled in a least one of the corners of the parallelepipedal stave wherein an injection device may be partly inserted in.
A hot rolled steel sheet having a composition comprising of the following elements 0.060%≤Carbon≤0.1%, 1.4%≤Manganese≤1.8%, 0.3%≤Silicon≤0.8%, 0.01%≤ Aluminum≤0.1%, 0.01%≤Niobium≤0.09%, 0.01%≤Titanium≤0.09%, 0.002%≤ Phosphorus ≤ 0.02 %, 0 % ≤ Sulfur ≤ 0.005 %, 0 % ≤ Nitrogen ≤ 0.01%, with 0.045% ≤ Ti+Nb ≤ 0.060%, 0% ≤ Chromium ≤ 0.5%, 0% ≤ Molybdenum ≤ 0.4%, 0% ≤ Vanadium ≤ 0.4%, 0% ≤ Calcium ≤ 0.005%, 0% ≤ Copper ≤ 1%,0% ≤ Nickel ≤ 1%, 0 % ≤ Boron ≤ 0.05%, 0 % ≤ Magnesium ≤ 0.05%, the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure of said steel sheet comprising in area fraction, 10% to 20% Bainite, 80% to 92% Ferrite wherein the aspect ratio of the grains of Bainite and Ferrite is less than 1.75 and a cumulated amount of Residual Austenite and Martensite is from 0% to 10 %.
A cooling method of a travelling coated steel strip, exiting a hot-dip coating bath, including the steps of A) sucking a gas into a cooling device, B) filtering the sucked gas by a filtering system capturing at least 50% of the particles having a size of at least 2.5 µm, C) blowing, at a velocity comprised from 1 to 80 m.s-1, the sucked and filtered gas onto the coated steel strip.
