ArcelorMittal France Patent applications |
Patent application number | Title | Published |
20140216612 | Steel, for Hot Forming or Quenching in a Tool, having Improved Ductility - The invention relates to a steel part, the composition of the steel of which comprises, the contents being expressed by weight: 0.040%≦C≦0.100%; 0.80%≦Mn≦2.00%; Si≦0.30%; S≦0.005%; P≦0.030%; 0.010%≦Al≦0.070%; 0.015%≦Nb≦0.100%; 0.030%≦Ti≦0.080%; N≦0.009%; Cu≦0.100%; Ni≦0.100%; Cr≦0.100%; Mo≦0.100%; and Ca≦0.006%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% equiaxed ferrite, martensite in an amount not less than 5% but not exceeding 20%, and bainite in an amount not exceeding 10%. | 08-07-2014 |
20140057128 | PRECOATED STEEL PLATE, WELDED BLANK, PART AND METHODS - A plate is provided. The plate includes a steel substrate and a precoat having a layer of intermetallic alloy in contact with the substrate, topped by a layer of aluminum alloy. On at least one precoated face of the plate, an area situated at the periphery of the plate has the aluminum alloy layer removed. A part and a welded blank are also provided. Methods are also provided. | 02-27-2014 |
20140047729 | METHOD AND DEVICE FOR BLOWING GAS ON A RUNNING STRIP - The present invention relates to a method for acting on the temperature of a travelling strip ( | 02-20-2014 |
20130239890 | Method for Coating a Substrate and Metal Alloy Vacuum Deposition Facility - The present invention provides a process for coating a substrate. A metal alloy layer including at least two metallic elements is continuously deposited on the substrate by a vacuum deposition facility. The facility includes a vapor jet coater for spraying the substrate with a vapor containing the metallic elements in a constant and predetermined relative content, the vapor being sprayed at a sonic velocity. The process may advantageously be used for depositing Zn—Mg coatings. The invention also provides a vacuum deposition facility for continuously depositing coatings formed from metal alloys, for implementing the process. | 09-19-2013 |
20130174942 | STEEL PLATE FOR PRODUCING LIGHT STRUCTURES AND METHOD FOR PRODUCING SAID PLATE - The invention relates to a steel plate, the chemical composition of which comprises, the contents being expressed by weight: 0.010%≦C≦0.20%, 0.06%≦Mn≦3%, Si≦1.5%, 0.005%≦Al≦1.5%, S≦0.030%, P≦0.040%, 2.5%≦Ti≦7.2%, (0.45×Ti)−0.35%≦B≦(0.45×Ti)+0.70%, and optionally one or more elements chosen from: Ni≦1%, Mo≦1%, Cr≦3%, Nb≦0.1%, V≦0.1%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting. | 07-11-2013 |
20130029172 | COATED STEEL STRIPS, METHODS OF MAKING THE SAME, METHODS OF USING THE SAME, STAMPING BLANKS PREPARED FROM THE SAME, STAMPED PRODUCTS PREPARED FROM THE SAME, AND ARTICLES OF MANUFACTURE WHICH CONTAIN SUCH A STAMPED PRODUCT - Coated steel having a well defined and uniform thickness is useful and advantageous for preparing products by hot stamping. Products prepared by hot stamping such a steel are particularly advantageous when subjected to a subsequent spot welding step. | 01-31-2013 |
20120211128 | METHOD FOR MAKING A STEEL PART OF MULTIPHASE MICROSTRUCTURE - A steel part having a homogeneous multiphase microstructure in each region of the part, the microstructure containing ferrite, wherein the steel part is obtained by a process involving:
| 08-23-2012 |
20120074106 | METHOD FOR MANUFACTURING A WELDED COMPONENT WITH VERY HIGH MECHANICAL CHARACTERISTICS FROM A COATED LAMINATION SHEET - Plate consisting of a steel substrate ( | 03-29-2012 |
20120064362 | PROCESS FOR MANUFACTURING STAMPED PRODUCTS, AND STAMPED PRODUCTS PREPARED FROM THE SAME - The invention relates to a process for making a hot stamped coated steel sheet product, comprising the steps of pre-coating a steel strip or sheet with aluminium-or aluminium alloy, cutting said pre-coated steel strip or sheet to obtain a pre-coated steel blank, heating the blank in a furnace preheated to a temperature and during a time defined by diagram according to thickness, at a heating rate V | 03-15-2012 |
20110214475 | PROCESS FOR MANUFACTURING STAMPED PRODUCTS, AND STAMPED PRODUCTS PREPARED FROM THE SAME - The invention relates to a process for making a hot stamped coated steel sheet product, comprising the steps of pre-coating a steel strip or sheet with aluminium-or aluminium alloy, cutting said pre-coated steel strip or sheet to obtain a pre-coated steel blank, heating the blank in a furnace preheated to a temperature and during a time defined by diagram according to thickness, at a heating rate V | 09-08-2011 |
20110165436 | COATED STEEL STRIPS, METHODS OF MAKING THE SAME, METHODS OF USING THE SAME, STAMPING BLANKS PREPARED FROM THE SAME, STAMPED PRODUCTS PREPARED FROM THE SAME, AND ARTICLES OF MANUFACTURE WHICH CONTAIN SUCH A STAMPED PRODUCT - Coated steel having a well defined and uniform thickness is useful and advantageous for preparing products by hot stamping. Products prepared by hot stamping such a steel are particularly advantageous when subjected to a subsequent spot welding step. | 07-07-2011 |
20110070425 | PROCESS FOR THE PRODUCTION OF ENAMELLED STEEL SHEET OR PART - The invention relates to a steel sheet or part whose composition is suitable for enamelling, and which is coated with a coating consisting of a matrix of polymer in which particles of non-oxide ceramic are homogeneously dispersed. It also relates to the use of this coated steel sheet or part for producing an enamelled steel sheet or part, and to a process for producing an enamelled steel sheet or part allowing a decrease of firing temperature and time compared with conventional firing temperatures and times. | 03-24-2011 |
20110018178 | METHOD AND DEVICE FOR BLOWING GAS ON A RUNNING STRIP - The present invention relates to a method for acting on the temperature of a travelling strip ( | 01-27-2011 |
20110006491 | PROCESS FOR MANUFACTURING STAMPED PRODUCTS, AND STAMPED PRODUCTS PREPARED FROM THE SAME - The invention relates to a process for making a hot stamped coated steel sheet product, comprising the steps of pre-coating a steel strip or sheet with aluminium—or aluminium alloy, cutting said pre-coated steel strip or sheet to obtain a pre-coated steel blank, heating the blank in a furnace preheated to a temperature and during a time defined by diagram according to thickness, at a heating rate V | 01-13-2011 |
20110000431 | INDUSTRIAL VAPOUR GENERATOR FOR THE DEPOSITION OF AN ALLOY COATING ONTO A METAL STRIP - The invention relates to a vapour generator for the deposition of a metal coating onto a substrate ( | 01-06-2011 |
20100307644 | PROCESS FOR MANUFACTURING COLD-ROLLED AND ANNEALED STEEL SHEET WITH A VERY HIGH STRENGTH, AND SHEET THUS PRODUCED - The invention relates to a cold-rolled and annealed steel sheet with a strength greater than 1200 MPa, the composition of which comprises, the contents being expressed by weight: 0.10%≦C≦0.25%, 1%≦Mn≦3%, Al≧0.010%, Si≦2.990%, S≦0.015%, P≦0.1%, N≦0.008%, it being understood that 1%≦Si+Al≦3%, the composition optionally comprising: 0.05%≦V≦0.15%, B≦0.005%, Mo≦0.25%, Cr≦1.65%, it being understood that Cr+3Mo≧0.3%, Ti in an amount such that Ti/N≧4 and Ti≦0.040%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel comprising 15 to 90% bainite, the remainder consisting of martensite and residual austenite. | 12-09-2010 |
20100300585 | LOW-DENSITY STEEL HAVING GOOD DRAWABILITY - The invention relates to a hot-rolled ferritic steel sheet, the composition of the steel of which comprises, the contents being expressed by weight: 0.001≦C≦0.15%, Mn≦1%, Si≦1.5%, 6%≦Al≦10%, 0.020%≦Ti≦0.5%, S≦0.050%, P≦0.1%, and, optionally, one or more elements chosen from: Cr≦1%, Mo≦1%, Ni≦1%, Nb≦0.1%, V≦0.2%, B≦0.010%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the average ferrite grain size d | 12-02-2010 |
20100282374 | GALVANIZED OR GALVANNEALED SILICON STEEL - The invention deals with a hot-dip galvanized or galvannealed steel sheet wherein, the composition of the steel sheet comprises, by weight: 0.01≦C≦0.22%, 0.50≦Mn≦2.0%, 0.2≦Si≦3.0%, 0.005≦Al≦2.0%, Mo<1.0%, Cr≦1.0%, P<0.02%, Ti≦0.20%, V≦0.40%, Ni≦1.0%, Nb≦0.20%, the balance of the composition being iron and unavoidable impurities resulting from the smelting, and the steel sheet comprises a layer of an internal nitride of at least one type of nitride selected from a Si nitride, Mn nitride, Al nitride, complex nitride comprising Si and Mn, or Al and Si, or Al and Mn, or complex nitride comprising Si, Mn and Al, said steel sheet comprising no further outer layer of iron nitride. | 11-11-2010 |
20100269556 | METHOD OF ROLLING A METAL STRIP WITH ADJUSTMENT OF THE LATERAL POSITION OF A STRIP AND SUITABLE ROLLING MILL - One subject of the invention is a method of rolling a strip (B) in a rolling mill for metal products, which mill has at least two stands in the nips of which the strip (B) is simultaneously gripped, whereby the lateral position of said strip (B) is adjusted, by simultaneously determining downstream of each of the stands of the rolling mill in the nips of which said strip (B) is gripped, a value representative of its lateral position along a line transverse to its run direction, and the algebraic differences (Δxp) between the lateral positions and a reference position ( | 10-28-2010 |
20100237066 | COMB-LIKE SLIT LAMINATED YOKE FOR A TRAVELLING-MAGNETIC-FIELD INDUCTOR FOR REHEATING METAL STRIP - Yoke formed by a stack of magnetic laminations | 09-23-2010 |
20100221573 | PROCESS FOR MANUFACTURING STEEL SHEET HAVING HIGH TENSILE STRENGTH AND DUCTILITY CHARACTERISTICS, AND SHEET THUS PRODUCED - The invention relates to a hot-rolled steel sheet having a tensile strength greater than 800 MPa and an elongation at break greater than 10%, the composition of which comprises, the contents being expressed by weight: 0.050%≦C≦0.090%, 1%≦Mn≦2%, 0.015%≦Al≦0.050%, 0.1%≦Si≦0.3%, 0.10%≦Mo≦0.40%, S≦0.010%, P≦0.025%, 0.003%≦N≦0.009%, 0.12%≦V≦0.22%, Ti≦0.005%, Nb≦0.020% and, optionally, Cr≦0.45%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the sheet or the part comprising, as a surface fraction, at least 80% upper bainite, the possible complement consisting of lower bainite, martensite and residual austenite, the sum of the martensite and residual austenite contents being less than 5%. | 09-02-2010 |
20100221572 | STEEL, FOR HOT FORMING OR QUENCHING IN A TOOL, HAVING IMPROVED DUCTILITY - The invention relates to a steel part, the composition of the steel of which comprises, the contents being expressed by weight: 0.040%≦C≦0.100%; 0.80%≦Mn≦2.00%; Si≦0.30%; S≦0.005%; P≦0.030%; 0.010% S≦Al≦0.070%; 0.015%≦Nb≦0.100%; 0.030% Ti≦0.080%; N≦0.009%; Cu≦0.100%; Ni≦0.100%; Cr≦0.100%; Mo≦0.100%; and Ca≦0.006%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% equiaxed ferrite, martensite in an amount not less than 5% but not exceeding 20%, and bainite in an amount not exceeding 10%. | 09-02-2010 |
20100193081 | PROCESS FOR MANUFACTURING A GALVANNEALED STEEL SHEET BY DFF REGULATION - The invention deals with a process for manufacturing a hot-dip galvannealed steel sheet having a TRIP microstructure, and comprising, by % by weight, 0.01≦C≦0.22%, 0.50≦Mn≦2.0%, 0.508-05-2010 | |
20100186854 | PROCESS FOR MANUFACTURING A GALVANIZED OR A GALVANNEALED STEEL SHEET BY DFF REGULATION - The invention deals with a process for manufacturing a hot-dip galvanized or galvannealed steel sheet having a TRIP microstructure, said process comprising the steps consisting in:—providing a steel sheet whose composition comprises, by weight: 0.01≦C≦0.22%, 0.50≦Mn≦2.0%, 0.2≦Si≦2.0%, 0.005≦Al≦2.0%, Mo<1.0%, Cr≦1.0%, P<0.02%, Ti≦0.20%, V≦0.40%, Ni≦1.0%, Nb≦0.20%, the balance of the composition being iron and unavoidable impurities resulting from the smelting,—oxidizing said steel sheet in a direct flame furnace where the atmosphere comprises air and fuel with an air-to-fuel ratio between 0.80 and 0.95, so that a layer of iron oxide having a thickness from 0.05 to 0.2 μm is formed on the surface of the steel sheet, and an internal oxide of Si and/or Mn and/or Al is formed,—reducing said oxidized steel sheet, at a reduction rate from 0.001 to 0.010 μm/s, in order to achieve a reduction of the layer of iron oxide,—hot-dip galvanising said reduced steel sheet to form a zinc-coated steel sheet, and—optionally, subjecting said hot-dip coated steel sheet to an alloying treatment to form a galvannealed steel sheet. | 07-29-2010 |
20100180657 | ROLLING MILL WITH COOLING DEVICE AND ROLLING PROCESS - The invention deals with a rolling mill ( | 07-22-2010 |
20100104752 | METHOD FOR COATING A SUBSTRATE AND METAL ALLOY VACUUM DEPOSITION FACILITY - The invention relates to a process for coating a substrate (S) whereby a metal alloy layer comprising at least two metallic elements is continuously deposited on the substrate (S) by means of a vacuum deposition facility ( | 04-29-2010 |
20100051448 | METHOD AND INSTALLATION FOR THE VACUUM COLOURING OF A METAL STRIP BY MEANS OF MAGNETRON SPUTTERING - A vacuum process for etching a metal strip running over a backing roll facing a counterelectrode by magnetron sputtering, and a vacuum chamber etching installation implementing the process. A plasma is created in a gas close to the metal strip so as to generate radicals and/or ions that act on the strip, and at least one closed magnetic circuit, the width of which is approximately equal to that of the metal strip, is selected from a series of at least two closed magnetic circuits of different and fixed widths, then the selected magnetic circuit is positioned so as to face the metal strip, and then the etching of the moving metal strip is carried out. | 03-04-2010 |
20090308499 | PROCESS FOR MANUFACTURING IRON-CARBON-MANGANESE AUSTENITIC STEEL SHEET WITH EXCELLENT RESISTANCE TO DELAYED CRACKING, AND SHEET THUS PRODUCED - An austenitic steel sheet excellent in resistance to delayed cracking, the composition of said steel comprising, in weight: 0,35%12-17-2009 | |
20090242079 | METHOD FOR TREATING METAL SURFACES BY CARBOXYLATION, USE OF THE METHOD FOR TEMPORARY PROTECTION AGAINST CORROSION, AND METHOD FOR MANUFACTURING A SHAPED METAL SHEET THUS CARBOXYLATED - The invention relates to a method for the carboxylation conversion of a metal surface under oxidising conditions in relation to the metal, consisting in bringing the metal into contact with a hydro-organic or aqueous bath containing a mixture of organic acids. The invention is characterised in that; the organic acids comprise saturated linear carboxylic acids having between 10 and 18 carbon atoms; the mixture comprises a binary or ternary mixture of such acids; the respective proportions of said acids are such that (i) for a binary mixture x±5%−y±5%, wherein x and y represent the respective proportions, in molar percentages, of the two acids in a mixture with the composition of the eutectic and (ii) for a ternary mixture x±3%−y±3%−z±3%, wherein x, y and z represent the respective proportions, in molar percentages, of the three acids in a mixture with the composition of the eutectic; and the concentration of the mixture in the bath is greater than or equal to 20 g/l. | 10-01-2009 |
20090220815 | METHOD FOR MANUFACTURING A WELDED COMPONENT WITH VERY HIGH MECHANICAL CHARACTERISTICS FROM A COATED LAMINATION SHEET - Plate consisting of a steel substrate ( | 09-03-2009 |
20090107588 | PROCESS FOR MANUFACTURING STEEL SHEET HAVING VERY HIGH STRENGTH, DUCTILITY AND TOUGHNESS CHARACTERISTICS, AND SHEET THUS PRODUCED - The invention relates to a hot-rolled steel sheet having a tensile strength of greater than 1200 MPa, an Re/Rm ratio of less than 0.75 and an elongation at break of greater than 10%, the composition of which contains, the contents being expressed by weight: 0.10%≦C≦0.25%; 1%≦Mn≦3%; Al≧0.015%; Si≦1.985%; Mo≦0.30%; Cr≦1.5%; S≦0.015%; P≦0.1%; Co≦1.5%; B≦0.005%; it being understood that 1%≦Si+Al≦2%; Cr+(3×Mo)≧0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% bainite, residual austenite in an amount equal to or greater than 5% and martensite in an amount equal to or greater than 2%. | 04-30-2009 |
20090025836 | Method Of Producing A Part With Very High Mechanical Properties From A Rolled Coated Sheet - The invention relates to a steel part coated with a compound consisting, over more than 90% of its thickness, of at least one Fe/Zn-based phase, the iron weight content of which is equal to 65% or higher and the Fe/Zn ratio of which is between 1.9 and 4, said compound being formed by at least one heat treatment for alloying between said steel and a precoat, said precoat consisting of a zinc alloy comprising, the contents being expressed by weight, between 0.5 and 2.5% aluminum and, optionally, one or more elements chosen from: Pb≦0.003%; Sb≦0.003%; Bi≦0.003%; 0.002%≦Si≦0.070%; La<0.05%; Ce<0.05%, the balance consisting of zinc and inevitable impurities. | 01-29-2009 |
20080308194 | Method for Making a Steel Part of Multiphase Microstructure - The subject of the invention is a process for manufacturing a part made of steel having a multiphase microstructure, said microstructure comprising ferrite and being homogeneous in each of the regions of said part, which process comprises the steps consisting in:
| 12-18-2008 |
20080199347 | Method of Producing High-Strength Steel Plates with Excellent Ductility and Plates Thus Produced - Steel sheet, the composition of the steel of which comprises, the contents being expressed by weight: 0.08%≦C≦0.23%, 1%≦Mn≦2%, 1≦Si≦2%, Al≦0.030%, 0.1%≦V≦0.25%, Ti≦0.010%, S≦0.015%, P≦0.1%, 0.004%≦N≦0.012%, and, optionally, one or more elements chosen from: Nb≦0.1%, Mo≦0.5%, Cr≦0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting. | 08-21-2008 |