Patents Assigned to Usinor
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Patent number: 10166742Abstract: The invention concerns a metal laminate comprising between two outer metal sheets an adhesive polymer layer, characterized in that the adhesive polymer layer comprises polyamide, a copolymer of ethylene and an unsaturated carboxylic acid and/or a derivative thereof and a reactive copolymer. The invention further concerns a process for the manufacture of such a metal laminate and the use of such metal laminates for the manufacture of automotive body parts.Type: GrantFiled: August 4, 2004Date of Patent: January 1, 2019Assignees: USINOR, THYSSEN KRUPP STAHL AGInventors: Antoine Gauriat, Cédric Calvez, Francis Schmit, Cetin Nazikkol, Christoph Filthaut, Roland Herd Smith, Jiri Pac
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Patent number: 9502214Abstract: An apparatus is provided that performs continuous cleaning of a surface of a grounded material which is coated with an organic substance. The apparatus includes a plurality of electrodes covered with a dielectric and disposed along the surface of the material. The electrodes are connected to a high-voltage generator using a MOS power transistor connected to a step up transformer to convert low-voltage pulses generated from a low-voltage power supply into high-voltage pulses. The apparatus is configured to provide a pulsed electric field wherein the maximum voltage of the positive pulses U+ is greater than the arc-striking voltage Ua, and the maximum absolute value of the voltage of the negative pulses U? is less than the striking voltage Ua.Type: GrantFiled: June 16, 2009Date of Patent: November 22, 2016Assignee: USINORInventors: Daniel Chaleix, Patrick Choquet, Gerard Baravian, Bernard Lacour, Vincent Puech
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Patent number: 9039846Abstract: The invention concerns a cold-rolled aluminum killed steel sheet, which includes by weight between 0.003 and 0.130% of carbon, between 0.10 and 1% of manganese, between 0.010 and 0.100% of aluminum, between 0.0015 and 0.0140% nitrogen, the remainder being of iron and impurities resulting from the manufacturing, and which has a content of carbon in solid solution (Css) of at least 50 ppm, as well as a method of manufacturing packaging from said sheet.Type: GrantFiled: March 19, 2003Date of Patent: May 26, 2015Assignee: USINORInventor: Mohamed Bouzekri
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Patent number: 8926772Abstract: The invention relates to a hot rolled sheet which is made from austenitic iron/carbon/manganese steel and which has a resistance of greater than 900 MPa, whereby: resistance (MPa) x elongation at rupture (%) is greater than 45000. The chemical composition of the inventive sheet comprises the following concentrations expressed as weight: 0.5%=C=0.7%, 17%=Mn=24%, Si=3%, Al=0.05%, S=0.03%, P=0.08%, N=0.1% and, optionally, one or more elements such as Cr=1%, Mo=0.4%, Ni=1%, Ti=0.5%, Nb=0.5%, V=0.5%, Cu=5%, Cu=5%, the rest of the composition comprising iron and impurities resulting from production. According to the invention, the recrystallised fraction of the steel is greater than 75% and the surface fraction of precipitated carbides of the steel is less than 1.5%, the average grain size of the steel being less than 18 micrometers.Type: GrantFiled: July 8, 2004Date of Patent: January 6, 2015Assignee: UsinorInventors: Mohamed Bouzekri, Michel Faral, Colin Scott
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Patent number: 8877003Abstract: The invention relates to a method of cleaning the surface of a material that is coated with an organic substance. The inventive method is characterized in that it comprises the following steps, consisting in: introducing the material into a treatment chamber, having a pressure of between 10 mbar and 1 bar therein, which is supplied with a gas stream containing at least 90 volume percent of oxygen; and generating a plasma by passing an electric discharge between the surface of the material and a dielectric-covered electrode in order to break down the organic substance under the action of the free radicals O thus produces. The invention also relates to an installation that is used to carry out said method.Type: GrantFiled: December 4, 2009Date of Patent: November 4, 2014Assignee: UsinorInventors: Eric Silberberg, Eric Michel, Francois Reniers, Claudine Buess-Herman
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Patent number: 8591660Abstract: The invention relates to a method of cleaning the surface of a material that is coated with an organic substance. The inventive method is characterized in that it comprises the following steps, consisting in: introducing the material into a treatment chamber, having a pressure of between 10 mbar and 1 bar therein, which is supplied with a gas stream containing at least 90 volume percent of oxygen; and generating a plasma by passing an electric discharge between the surface of the material and a dielectric-covered electrode in order to break down the organic substance under the action of the free radicals O thus produces. The invention also relates to an installation that is used to carry out said method.Type: GrantFiled: December 4, 2009Date of Patent: November 26, 2013Assignee: UsinorInventors: Eric Silberberg, Eric Michel, Francois Reniers, Claudine Buess-Herman
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Patent number: 8491734Abstract: A process of production for producing a high strength galvannealed steel sheet by a hot-dip galvanized steel sheet production equipment using an all radiant tube type annealing furnace and a production equipment for the same are provided, comprising continuously hot-dip galvanizing a high strength steel sheet having a content of Si of 0.4 to 2.0 wt % during which making the atmosphere of the reducing zone an atmosphere containing H2 to 1 to 60 wt % and comprised of the balance of N2, H2O, O2, CO2, CO, and unavoidable impurities, controlling the log (PCO2/PH2) of the carbon dioxide partial pressure and hydrogen partial pressure in the atmosphere to log (PCO2/PH2)??0.5 and the log (PH2O/PH2) of the water partial pressure and hydrogen partial pressure to log (PH2O/PH2)??0.5, and controlling the log (PT/PH2) of the total partial pressure PT of the carbon dioxide partial pressure PCO2 and water partial pressure PH2O and the hydrogen partial pressure to ?3?log (PT/PH2)??0.5.Type: GrantFiled: August 19, 2004Date of Patent: July 23, 2013Assignees: Nippon Steel & Sumitomo Metal Corporation, UsinorInventors: Kazuhiko Honda, Koki Tanaka
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Patent number: 8309004Abstract: The subject of the invention is a method for fabricating a composite laminate part, consisting in coating a steel sheet of which the thickness is less than 0.65 mm, with an adhesive polymer film of which the thickness is at least 0.1 mm, in order to form a composite laminate steel sheet, and then forming this composite laminate sheet by drawing in order to obtain said composite part.Type: GrantFiled: February 17, 2005Date of Patent: November 13, 2012Assignee: USINORInventor: Fabrice Pinard
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Publication number: 20110223441Abstract: The invention concerns a very high mechanical strength steel, whereof the chemical composition comprises in wt. %: 0.060%=C=0.250%; 0.400%=Mn=0.950%; Si=0.300%; Cr=0.300%; 0.100%=Mo=0.500%; 0.020%=AI=0.100%; P=0.100%; B=0.010%; Ti=0.050%, the rest being iron and impurities resulting from preparation. The invention also concerns a method for making a sheet of said steel coated with zinc or zinc alloy.Type: ApplicationFiled: May 20, 2011Publication date: September 15, 2011Applicant: USINORInventors: Antoine MOULIN, Jean-Luc LAPOINTE
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Patent number: 7976647Abstract: The invention concerns a very high mechanical strength steel, whereof the chemical composition comprises in wt. %: 0.006%=C=0250%; 0.400%=Mn=0.950%; Si=0.300%; Cr=0.300%; 0.100%=Mo=0.500%; 0.020%=AI=0.100%; P=0.100%; B=0.010%; Ti=0.050%, the rest being iron and impurities resulting from preparation. The invention also concerns a method for making a sheet of said steel coated with zinc or zinc alloy.Type: GrantFiled: September 4, 2003Date of Patent: July 12, 2011Assignee: USINORInventors: Antoine Moulin, Jean-Luc Lapointe
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Publication number: 20100139864Abstract: The invention relates to a method of cleaning the surface of a material that is coated with an organic substance. The inventive method is characterized in that it comprises the following steps, consisting in: introducing the material into a treatment chamber, having a pressure of between 10 mbar and 1 bar therein, which is supplied with a gas stream containing at least 90 volume percent of oxygen; and generating a plasma by passing an electric discharge between the surface of the material and a dielectric-covered electrode in order to break down the organic substance under the action of the free radicals O thus produces. The invention also relates to an installation that is used to carry out said method.Type: ApplicationFiled: December 4, 2009Publication date: June 10, 2010Applicant: USINORInventors: Eric SILBERBERG, Eric Michel, Francois Reniers, Claudine Buess-Herman
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Publication number: 20100139691Abstract: The invention relates to a method of cleaning the surface of a material that is coated with an organic substance. The inventive method is characterized in that it comprises the following steps, consisting in: introducing the material into a treatment chamber, having a pressure of between 10 mbar and 1 bar therein, which is supplied with a gas stream containing at least 90 volume percent of oxygen; and generating a plasma by passing an electric discharge between the surface of the material and a dielectric-covered electrode in order to break down the organic substance under the action of the free radicals O thus produces. The invention also relates to an installation that is used to carry out said method.Type: ApplicationFiled: December 4, 2009Publication date: June 10, 2010Applicant: USINORInventors: Eric SILBERBERG, Eric Michel, Francois Reniers, Claudine Buess-Herman
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Patent number: 7699947Abstract: The invention relates to ultrahigh strength hot-rolled steel having a chemical composition consisting of, by weight: 0.05%?C?0.1% 0.7%?Mn?1.1% 0.5%?Cr?1.0% 0.05%?Si?0.3% 0.05%?Ti?0.1% Al?0.07% S?0.03% P?0.05% the remainder comprising iron and impurities resulting from the production thereof. Moreover, the inventive steel has a bainitic-martensitic structure which can contain up to 5% ferrite. The invention also relates to a method of producing bands of said steel.Type: GrantFiled: January 14, 2004Date of Patent: April 20, 2010Assignee: USINORInventors: Mireille Seux, Christophe Issartel, Fabienne Roumegoux
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Patent number: 7695826Abstract: The present invention provides an alloyed molten zinc plated steel sheet having an area of the Fe and Zn alloy phase in the unformed parts in the plating layer of less than 10% of the area of the steel sheet as a whole and superior in strength and shapeability and a method of producing this alloyed molten zinc plating steel sheet by a continuous zinc plating production system which enables production at a low cost without modification of the system or addition of steps, said alloyed molten zinc plated steel sheet characterized by comprising a steel sheet including C: 0.05 to 0.40%, Si: 0.2 to 3.0%, and Mn: 0.1 to 2.5%, the balance comprised of Fe and unavoidable impurities, having on its surface a Zn alloy plating layer comprised of Fe in a concentration of 7 to 15 wt %, Al in a concentration of 0.Type: GrantFiled: March 30, 2004Date of Patent: April 13, 2010Assignees: Nippon Steel Corporation, USINORInventors: Koki Tanaka, Yoichi Ikematsu, Shunichi Hayashi, Hideaki Sawada, Akira Takahashi, Kazuhiko Honda, Masayoshi Suehiro, Yoshihisa Takada
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Patent number: 7687152Abstract: A molten zinc plated steel sheet superior in plating bondability and provided with both strength and shapeability is provided and a method of producing this molten zinc plating steel sheet by a continuous zinc plating production system which enables production at a low cost without modification of the system or addition of steps is provided, said molten zinc plated steel sheet characterized by comprising, by wt %, a steel sheet including C: 0.05 to 0.40%, Si: 0.2 to 3.0%, and Mn: 0.1 to 2.5%, the balance comprised of Fe and unavoidable impurities, having on its surface a Zn plating layer containing Al: 0.01 to 1% and the balance of Zn and unavoidable impurities and containing inside the steel sheet within 2 ?m from the interface of said plating layer and steel sheet oxide particles of at least one type of oxide selected from an Al oxide, Si oxide, Mn oxide, or complex oxide comprised of at least two of Al, Si, and Mn.Type: GrantFiled: March 30, 2004Date of Patent: March 30, 2010Assignees: Nippon Steel Corporation, USINORInventors: Yoichi Ikematsu, Koki Tanaka, Shunichi Hayashi, Hideaki Sawada, Akira Takahashi, Kazuhiko Honda, Masayoshi Suehiro, Yoshihisa Takada
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Patent number: 7674339Abstract: The invention relates to a method of cleaning the surface of a material (4) that is coated with an organic substance. The inventive method is characterised in that it comprises the following steps, consisting in: introducing the material (4) into a treatment chamber (2), having a pressure of between 10 mbar and 1 bar therein, which is supplied with a gas stream containing at least 90 volume percent of oxygen; and generating a plasma by passing an electric discharge between the surface of the material and a dielectric-covered electrode (5a, 5b, 5c, 5d, 5e, 5f, 5g) in order to break down the organic substance under the action of the free radicals O thus produced. The invention also relates to an installation (1) that is used to carry out said method.Type: GrantFiled: February 19, 2003Date of Patent: March 9, 2010Assignee: USINORInventors: Eric Silberberg, Eric Michel, Francois Reniers, Claudine Buess-Herman
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Patent number: 7662237Abstract: A method for the continuous cleaning of the surface of a material (2) which is coated with an organic substance. Steps of the method are: introducing the material (2) into a treatment area which is supplied with a gas stream containing oxygen; earthing the material (2); and generating a plasma by imposing an electric field between the surface of the material (2) and at least one dielectric-covered electrode (3), the electric field being pulsed and providing a succession of positive and negative voltage pulses in relation to the material (2). Moreover, the maximum voltage of the positive pulses U+ is greater than the arc-striking voltage Ua, and the maximum absolute value of the voltage of the negative pulses U? is less than the striking voltage Ua. Also, a generator and a device which are used to carry out this method.Type: GrantFiled: February 19, 2003Date of Patent: February 16, 2010Assignee: USINORInventors: Daniel Chaleix, Patrick Choquet, Gérard Baravian, Bernard Lacour, Vincent Puech
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Publication number: 20090255809Abstract: A method for the continuous cleaning of the surface of a material (2) which is coated with an organic substance. Steps of the method are: introducing the material (2) into a treatment area which is supplied with a gas stream containing oxygen; earthing the material (2); and generating a plasma by imposing an electric field between the surface of the material (2) and at least one dielectric-covered electrode (3), the electric field being pulsed and providing a succession of positive and negative voltage pulses in relation to the material (2). Moreover, the maximum voltage of the positive pulses U+ is greater than the arc-striking voltage Ua, and the maximum absolute value of the voltage of the negative pulses U? is less than the striking voltage Ua+. Also, a generator and a device which are used to carry out this method.Type: ApplicationFiled: June 16, 2009Publication date: October 15, 2009Applicant: USINORInventors: Daniel CHALEIX, Patrick Choquet, Gerard Baravian, Bernard Lacour, Vincent Puech
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Patent number: 7584638Abstract: A device for calibrating a multi-roll leveler for leveling a metal strip includes an assembly having two series of rolls, namely upper rolls and lower rolls which face each other so as to imbricate the rolls of one series into those of the other. The series of rolls are placed substantially parallel to each other and perpendicular to the run direction of the strip to be leveled. A rigid measurement bar of sufficient length is positioned in the leveling direction between the upper and lower rolls, extending over all the rolls, and having rigid protrusions integral with the bar reproducing, when they are placed plumb with the lower rolls, the action of the lower rolls and their mechanical properties. A thin metal plate rests on these protrusions and is fastened to one of them at around the middle of the bar and includes extensometers for measuring its elastic deformations.Type: GrantFiled: March 3, 2004Date of Patent: September 8, 2009Assignee: USINORInventors: Olivier Madelaine-Dupuich, Stéphane Rossi, Gilbert Petig, Philippe Wallendorf, Dominique Kircher, Fabrice Tondo, Eric Vasseur, Alain Fouratier, Jacques-Yves Bourgon, Christian Hoff
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Patent number: 7540928Abstract: The invention concerns a method for making hardenable steel plates by firing comprising: preparing a steel whereof the composition comprises, expressed in weight percent: 0.03=C=0.06, 0.50=Mn=1.10, 0.08:=Si=0.20, 0.015=Al=0.070, N=0.007, Ni=0.040, Cu=0.040, P=0.035, S=0.015, Mo=0.010, Ti=0.005; provided that it comprises boron in an amount such that 0.64=B/N=1.60 the rest consisting of iron and impurities resulting from production; casting a slab of said steel, then hot rolling of said slab to obtain a plate, the final rolling temperature being higher than the point Ar3; winding said plate at a temperature ranging between 500 and 700° C.; then cold rolling of said plate at a reduction rate ranging between 50 and 80%; continuous annealing heat treatment for a time interval less than 15 minutes; and strain hardening with a reduction rate ranging between 1.25 and 2.5%. The invention also concerns the hardenable plates and the parts obtainable therefrom.Type: GrantFiled: October 10, 2003Date of Patent: June 2, 2009Assignee: UsinorInventors: Joël Marsal, Fernande Kirch, Dominique Mescolini