Lead, Zinc, Or Tin Coating (e.g., Galvanizing, Etc.) Patents (Class 427/433)
  • Patent number: 10233518
    Abstract: A steel strip having a coating of an aluminium-zinc-silicon alloy on at least one surface of the strip is disclosed. The strip is characterised in that the aluminium-zinc-silicon alloy contains less than 1.2 wt. % silicon and also contains magnesium. A method of forming a coating of an aluminium-zinc-silicon alloy on a steel strip is also disclosed. The method includes moving steel strip upwardly through a coating pot containing a bath of an aluminium-zinc-silicon alloy and having an opening in a bottom wall of the pot and forming a coating of the alloy on the strip. The method is characterized by minimizing residence time of steel strip in contact with the aluminium-zinc-silicon alloy bath in the pot.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: March 19, 2019
    Assignee: Bluescope Steel Limited
    Inventors: Qiyang Liu, Joe Williams, Ross McDowall Smith
  • Patent number: 9181612
    Abstract: A manufacturing equipment for galvannealed steel sheet includes coating tub to coat steel sheet dipped in coating bath wherein the bath including molten zinc and is stored at bath temperature T1, separating tub to separate by flotation top-dross by precipitating the top-dross in the bath wherein the bath transferred from the coating tub is stored at bath temperature T2 lower than T1, Fe of the bath is supersaturated, and Al concentration A2 of the bath is controlled to high concentration by supplying first metal, adjusting tub to adjust Al concentration A3 of the bath by supplying second metal wherein the bath transferred from the separating tub is stored at bath temperature T3 higher than T2, Fe of the bath is unsaturated, and dross is dissolved, and circulator to circulate the bath in order of the coating tub, the separating tub, and the adjusting tub.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: November 10, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Nobuyoshi Okada, Masanori Hoshino, Atsushi Sakatoku
  • Patent number: 9103041
    Abstract: Disclosed is a method for improving surface properties of the stainless steels for bipolar plate of polymer electrolyte membrane fuel cell having low interfacial contact resistance and excellent corrosion resistance. The method for improving surface properties of the stainless steels according to one exemplary embodiment of the present invention includes: pickling a stainless steel with an aqueous sulfuric acid solution, the stainless steel comprising, by weight: C: 0.02% or less, N: 0.02% or less, Si: 0.4% or less, Mn: 0.2% or less, P: 0.04% or less, S: 0.02% or less, Cr: 25-32%, Mo: 0.1 to 5%, Cu: 0.1 to 2%, Ti: 0.5% or less, Nb: 0.5% or less, and the balance of Fe and other inevitable elements, and then washing the stainless steel with water, and then immersing the stainless steel in a mixture solution of nitric acid and hydrofluoric acid to form a passivation layer.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: August 11, 2015
    Assignee: POSCO
    Inventors: Jeong He-Lee, Young Hwan Kim, Jong Hee Kim
  • Patent number: 9040168
    Abstract: The galvannealed steel sheet includes: a galvannealed layer formed on at least one surface of a steel sheet and contains includes an amount of 0.05 mass % to 0.5 mass % of Al, an amount of 6 mass % of 12 mass % of Fe, and the balance composed of Zn and inevitable impurities; and a mixed layer formed on a surface of the galvannealed layer and includes a composite oxide of Mn, Zn, and P and an aqueous P compound, wherein the composite oxide includes 0.1 mg/m2 to 100 mg/m2 of Mn, an amount of 1 mg/m2 to 100 mg/m2 of P, and Zn, and a P/Mn ratio is 0.3 to 50, and wherein the total size of an area of the mixed layer in which an attached amount of P is equal to or more than 20 mg/m2 is 20% to 80% of a surface area of the mixed layer.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: May 26, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazuhiko Honda, Noriyuki Suzuki, Yoichi Ikematsu
  • Publication number: 20150132603
    Abstract: A metallic coated steel strip includes a steel strip and a metallic coating on at least one side of the strip. The metallic coating includes an Al—Zn—Mg—Si overlay alloy layer and an intermediate alloy layer between the steel strip and the overlay alloy layer. The intermediate alloy layer has a composition of, by weight, 4.0-12.0% Zn, 6.0-17.0% Si, 20.0-40.0% Fe, 0.02-0.50% Mg, and balance Al and unavoidable impurities.
    Type: Application
    Filed: July 31, 2013
    Publication date: May 14, 2015
    Inventor: Qiyang Liu
  • Patent number: 8999084
    Abstract: A galvanized steel sheet includes a zinc plating layer which is disposed on a steel sheet containing 0.01% to 0.15% C, 0.001% to 2.0% Si, 0.1% to 3.0% Mn, 0.001% to 1.0% Al, 0.005% to 0.060% P, and 0.01% or less S on a mass basis, the remainder being Fe and unavoidable impurities, and which has a mass per unit area 20 g/m2 to 120 g/m2. An oxide of at least one selected from the group consisting of Fe, Si, Mn, Al, and P is present in a surface portion of the steel sheet that lies directly under the zinc plating layer and that extends up to 100 ?m from the surface of a base steel sheet. The amount of the oxide per unit area is 0.05 g/m2 or less in total. The steel sheet has excellent corrosion resistance, anti-powdering property during heavy machining, and strength.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: April 7, 2015
    Assignee: JFE Steel Corporation
    Inventors: Yusuke Fushiwaki, Yoshiharu Sugimoto
  • Publication number: 20150090359
    Abstract: There are provided a hot-dip galvanized steel pipe in which the plating layer thereof is less liable to peel off even if the steel pipe is worked, and a method of manufacturing the hot-dip galvanized steel pipe. The hot-dip galvanized steel pipe includes a steel pipe and the plating layer formed on the surface of the steel pipe. Throughout the entire depth of plating layer, the fn defined by the following formula is at least 99.9: fn=Fe+Al+Zn where, the symbol of an element in the formula represents the content (mass %) of that element in the plating layer.
    Type: Application
    Filed: December 13, 2012
    Publication date: April 2, 2015
    Inventors: Kouichi Okamoto, Hioroshi Takebayashi, Yoshitaka Soga
  • Patent number: 8911879
    Abstract: The present invention provides a Zn—Al—Mg—Cr alloy-coated steel material with excellent corrosion resistance. A molten Zn—Al—Mg—Si—Cr alloy-coated steel material which is a steel material having a Zn—Al—Mg—Cr alloy coating layer and which has an interfacial alloy layer formed of coating layer components and Fe at the coating layer-steel material interface, wherein the interfacial alloy layer has a multilayer structure consisting of an Al—Fe-based alloy layer and an Al—Fe—Si-based alloy layer and furthermore, the Al—Fe—Si-based alloy layer contains Cr.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: December 16, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Nobuyuki Shimoda, Yasuhide Morimoto
  • Patent number: 8871037
    Abstract: The present invention relates to a method for diffusion treatment of a coating on an engineering part resistant to marine climate, comprising: Step 1. pretreating the part; Step 2. preheating the part in a protective atmosphere furnace; Step 3. immersing the pre-heated part in a plating solution in a way that the part is rotated in the submerging process; Step 4. carrying out diffusion treatment, i.e., placing the immersion-plated part into a vacuum furnace, maintaining at 800 to 950° C. for 1 to 3 hours, and then cooling it down prior to discharge, such that atoms at an interface are diffused to form a diffusion layer on a substrate, achieving metallurgical bonding between the coating and the substrate. Treatment by the method of the present invention enables the part to have full resistance to corrosion and scouring erosion under marine climate.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: October 28, 2014
    Assignee: Jiangsu Linlong New Materials Co., Ltd.
    Inventors: Lixin Feng, Minyan Zhang, Qiang Miao
  • Publication number: 20140302343
    Abstract: Steel strip provided with a hot dip galvanized zinc alloy coating layer, in which the coating of the steel strip is carried out in a bath of molten zinc alloy, the zinc alloy in the coating of: 0.3-2.3 weight % magnesium; 0.6-2.3 weight % aluminium; optional <0.2 weight % of one or more additional elements; unavoidable impurities; the remainder being zinc in which the zinc alloy coating layer has a thickness of 3-12 ?m.
    Type: Application
    Filed: June 18, 2014
    Publication date: October 9, 2014
    Inventors: Theodorus Franciscus Jozef MAALMAN, Robert BLEEKER, Margot Julia VLOT
  • Patent number: 8802198
    Abstract: The present invention generally relates to a flux for hot dip galvanization comprising from: 36 to 80 wt. % (percent by weight) of zinc chloride (ZnCl2); 8 to 62 wt. % of ammonium chloride (NH4C); from 2.0 to 10 wt. % of a least one of the following compounds: NiCl2, MnCl2 or a mixture thereof. The invention further relates to a fluxing bath, a process for the hot dip galvanization of an iron or steel article as well as to the use of said flux.
    Type: Grant
    Filed: January 18, 2010
    Date of Patent: August 12, 2014
    Assignee: Galva Power Group N.V.
    Inventors: David Warichet, Gentiana Kone, Anthony Vervisch
  • Patent number: 8785000
    Abstract: Steel strip provided with a hot dip galvanized zinc alloy coating layer, in which the coating of the steel strip is carried out in a bath of molten zinc alloy, the zinc alloy in the coating consisting of: 0.3-2.3 weight % magnesium; 0.6-2.3 weight % aluminum; optional <0.2 weight % of one or more additional elements; unavoidable impurities; the remainder being zinc in which the zinc alloy coating layer has a thickness of 3-12 ?m.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: July 22, 2014
    Assignee: Tata Steel Ijmuiden B.V.
    Inventors: Theodorus Franciscus Jozef Maalman, Robert Bleeker, Margot Julia Vlot
  • Patent number: 8691396
    Abstract: A galvannealed steel sheet obtained by subjecting a base steel sheet to hot-dip galvanization and then alloying the galvanization layer, the base steel sheet being obtained by hot rolling a specified steel. A method for producing the galvannealed steel sheet.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: April 8, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Fumio Yuse, Mikako Takeda, Shigenobu Namba, Yoshihiro Miyake
  • Patent number: 8679591
    Abstract: An embodiment is a method for forming a semiconductor assembly including cleaning a connector including copper formed on a substrate, applying cold tin to the connector, applying hot tin to the connector, and spin rinsing and drying the connector.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: March 25, 2014
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chien Ling Hwang, Yi-Li Hsiao, Chung-Shi Liu
  • Patent number: 8529998
    Abstract: A gas wiping nozzle includes a primary nozzle portion and at least one secondary nozzle portion provided either or both above and below the primary nozzle portion. The secondary nozzle portion jets a gas in a direction tilted from the direction in which the primary nozzle portion jets the gas and at a lower flow rate. The gas wiping nozzle has a tip whose lower surface forms an angle of 60° or more with the steel strip. The gas jetting port of the secondary nozzle portion is displaced in the direction opposite to the steel strip at least 5 mm apart from the gas jetting port of the primary nozzle portion, and the secondary nozzle portion jets the gas so that the flow rate of the secondary gas jet comes to 10 m/s or more at the confluence with the primary gas jet from the primary nozzle portion.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: September 10, 2013
    Assignee: JFE Steel Corporation
    Inventors: Genrato Takeda, Hideyuki Takahashi
  • Publication number: 20130209177
    Abstract: A subsurface support comprises a soil nail having an outer member and an inner member placed within the outer member. Features are provided to maintain a uniform spaced relationship between the inner and outer members. The spaced relationship may be achieved by crimping the outer member, or by use of an insert installed between the inner and outer members. In another embodiment, the support is made of composite construction materials, and having a self-drilling capability. The outer member may be fiberglass, and a metallic drill bit may be secured to a distal end of the soil nail. The inner member is preferably steel. A method is also provided to improve pull-out capacity by galvanizing the inner and outer members.
    Type: Application
    Filed: August 15, 2012
    Publication date: August 15, 2013
    Applicant: R&B LEASING, LLC
    Inventors: Colby BARRETT, Timothy Allen Ruckman
  • Patent number: 8485544
    Abstract: A method of making a galvanized upper coupler assembly for use in a trailer and the corresponding upper coupler assembly apparatus is disclosed. The method comprises the steps of providing a frame, covering at least one area of the frame with a mask, galvanizing the portions of the frame that are not covered, removing the mask, providing a kingpin, and attaching the kingpin to the frame. After attachment of the kingpin to the frame, the combined assembly can be coated with a rust resistant coating. if desired, a cover plate can be attached to the frame, over the kingpin.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: July 16, 2013
    Assignee: Great Dane Limited Partnership
    Inventors: Jerry Woodson McNeil, Richard Bordeaux Mullininx
  • Patent number: 8481172
    Abstract: A flat steel product, and a method for its production, which is formed from a steel substrate, such as strip or sheet steel, and a zinc-based corrosion protection coating, applied to at least one side of the steel substrate, which contains (in wt. %) Mg: 0.25 to 2.5%, Al: 0.2 to 3.0%, Fe: ?4.0%, and optionally in total up to 0.8% of one or more elements of the group Pb, Bi, Cd, Ti, B, Si, Cu, Ni, Co, Cr, Mn, Sn and rare earths, remainder zinc and unavoidable impurities are described. The corrosion protection coating has an Al content of maximum 0.5 wt. % in an intermediate layer extending between a surface layer directly adjacent to the surface of the flat steel product and a border layer adjacent to the steel substrate and with a thickness amounting to at least 20% of the total thickness of the corrosion protection coating.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: July 9, 2013
    Assignee: ThyssenKrupp Steel AG
    Inventors: Wilhelm Warnecke, Manfred Meurer, Rudolf Schönenberg, Michael Keller, Alexander Elsner
  • Patent number: 8470102
    Abstract: 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 ?m 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.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: June 25, 2013
    Assignee: ArcelorMittal France
    Inventors: Florence Bertrand, Didier Huin, Hubert Saint-Raymond
  • Publication number: 20130156964
    Abstract: A manufacturing equipment for galvannealed steel sheet includes coating tub to coat steel sheet dipped in coating bath wherein the bath including molten zinc and Al is stored at bath temperature T1, separating tub to separate by flotation top-dross by precipitating the top-dross in the bath wherein the bath transferred from the coating tub is stored at bath temperature T2 lower than T1, Fe of the bath is supersaturated, and Al concentration A2 of the bath is controlled to high concentration by supplying first metal, adjusting tub to adjust Al concentration A3 of the bath by supplying second metal wherein the bath transferred from the separating tub is stored at bath temperature T3 higher than T2, Fe of the bath is unsaturated, and dross is dissolved, and circulator to circulate the bath in order of the coating tub, the separating tub, and the adjusting tub.
    Type: Application
    Filed: August 9, 2011
    Publication date: June 20, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Nobuyoshi Okada, Masanori Hoshino, Atsushi Sakatoku
  • Publication number: 20130156963
    Abstract: A manufacturing equipment for galvanized steel sheet includes coating tub to coat steel sheet dipped in coating bath wherein the bath including molten zinc and Al is stored at bath temperature T1, separating tub to separate by a flotation top-dross by precipitating the top-dross in the bath wherein the bath transferred from the coating tub is stored at bath temperature T2 lower than T1, adjusting tub to dissolve dross wherein the bath transferred from the separating tub is stored at bath temperature T3 higher than T2 and Fe of the bath is unsaturated, and circulator to circulate the bath in order of the coating tub, the separating tub, and the adjusting tub.
    Type: Application
    Filed: August 9, 2011
    Publication date: June 20, 2013
    Inventors: Nobuyoshi Okada, Masanori Hoshino, Atsushi Sakatoku
  • Publication number: 20130059086
    Abstract: A hot dip method of forming an Al—Zn—Si—Mg alloy coating on a strip is disclosed. The method includes controlling the conditions in the molten bath to minimise the top dross layer in the molten bath. In particular, the method includes controlling top dross formation by including Ca and/or Sr in the coating alloy in the bath.
    Type: Application
    Filed: January 25, 2011
    Publication date: March 7, 2013
    Applicant: BLUESCOPE STEEL LIMITED
    Inventors: Michael Angel Lopez, Wayne Andrew Renshaw, Andrew Vincent Micallef, Nega Setargew, Paul Donaldson
  • Patent number: 8304029
    Abstract: The invention relates to a device for hot-dip coating a metal strand (1), especially a steel strip, in which the metal strand (1) is vertically guided through a container (3) accommodating the molten coating metal (2) and through a guide channel (4) disposed upstream thereof. The inventive device comprises at least two inductors (5) disposed at both sides of the metal strand (1) in the area of the guide channel (4) that are used to generate an electromagnetic field for retaining the coating metal (2) in the container (3), and at least one sensor (6, 6?) for detecting the position (s) of the metal strand (1) in the area of the guide channel (4).
    Type: Grant
    Filed: November 15, 2003
    Date of Patent: November 6, 2012
    Assignee: SMS Siemag Aktiengesellschaft
    Inventors: Rolf Brisberger, Bernhard Tenckhoff, Holger Behrens, Bodo Falkenhahn, Walter Trakowski, Michael Zielenbach, Robert Jürgens
  • Publication number: 20120100391
    Abstract: Provided is a hot-dip galvanized steel sheet having excellent plating qualities, plating adhesion and spot weldability, in which an alloy phase is formed at the interface between a base steel sheet and a galvanized layer, and a manufacturing method thereof.
    Type: Application
    Filed: November 24, 2010
    Publication date: April 26, 2012
    Applicant: POSCO
    Inventors: Jung-Woo Lee, Myung-Soo Kim, Seung-Bok Lee, Jin-Won Choi, Du-Youl Choi, Young-Ha Kim, Ju-Youn Lee, Dae-Young Kang
  • Patent number: 8062711
    Abstract: A device for stabilizing an elongated steel sheet when continuously transporting the steel sheet in a transport direction along a predetermined transport path. The device includes at least a first pair, a second pair and a third pair of electromagnets with at least one electromagnet on each side of the steel sheet. The electromagnets are adapted to stabilize the steel sheet with respect to the predetermined transport path. The first and second electromagnets are elongated in a direction essentially perpendicular to the transport direction. The first and second electromagnets are substantially arranged on each side of a longitudinal center line for the steel sheet. The center line is essentially parallel to the transport direction. The third electromagnet is arranged adjacent to the center line.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: November 22, 2011
    Assignee: ABB Research Ltd.
    Inventors: Peter Löfgren, Jan-Erik Eriksson, Mats Molander, Carl-Fredrik Lindberg, Conny Svahn
  • Patent number: 8025982
    Abstract: Disclosed is a high-strength hot dip galvannealed steel sheet having high powdering resistance produced by employing such a constitution that a Fe—Zn alloy plated layer is provided on at least one side of a basis steel sheet and a region in which Al (atomic %)/Zn (atomic %)?0.10 is present in a thickness of 300 ? or more from the surface of the plated layer along the depth direction of the plated layer. Also disclosed is a hot dip galvannealed steel sheet whose formability is greatly improved by optionally specifying chemical composition and structure of the basis steel sheet.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: September 27, 2011
    Assignee: Kobe Steel, Ltd.
    Inventors: Yuichi Futamura, Michitaka Tsunezawa, Masaaki Miura, Hiroshi Irie, Takatoshi Yoshida, Masafumi Shimizu
  • Patent number: 8021497
    Abstract: The invention relates to a method for producing a hardened steel part having a cathodic corrosion protection, whereby a) a coating is applied to a sheet made of a hardenable steel alloy in a continuous coating process; b) the coating is essentially comprised of zinc; c) the coating additionally contains one or more oxygen-affine elements in a total amount of 0.1% by weight to 15% by weight with regard to the entire coating; d) the coated steel sheet is then, at least in partial areas and with the admission of atmospheric oxygen, brought to a temperature necessary for hardening and is heated until it undergoes a microstructural change necessary for hardening, whereby; e) a superficial skin is formed on the coating from an oxide of the oxygen-affine element(s), and; f) the sheet is shaped before or after heating, and; g) the sheet is cooled after sufficient heating, whereby the cooling rate is calculated in order to achieve a hardening of the sheet alloy.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: September 20, 2011
    Assignee: voestalpine Stahl GmbH
    Inventors: Martin Fleischanderl, Siegfried Kolnberger, Josef Faderl, Gerald Landl, Anna Elisabeth Raab, Werner Brandstätter
  • Publication number: 20110212337
    Abstract: Disclosed is a galvannealed steel sheet having an excellent surface appearance, wherein plating failure and non-uniform alloying are suppressed. Also disclosed is a method for producing such a galvannealed steel sheet. The galvannealed steel sheet is obtained by hot-dip galvanizing a base steel, and then alloying the plating layer. The base steel is obtained by hot rolling a steel which contains 0.02-0.25 mass % of C, 0.5-3 mass % of Si, 1-4 mass % of Mn, 0.03-1 mass % of Cr, not more than 1.5 mass % of Al (excluding 0 mass %), not more than 0.03 mass % of P (excluding 0 mass %), not more than 0.03 mass % of S (excluding 0 mass %) and 0.003-1 mass % Ti, and additionally contains 0.25-5.0 mass % of Cu and 0.05-1.0 mass % of Ni, while satisfying formula (1), with the balance being made up of iron and unavoidable impurities. [Cu]/[Ni]?5 In formula (1), [ ] represents the content (mass %) of each element.
    Type: Application
    Filed: November 2, 2009
    Publication date: September 1, 2011
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel Ltd).
    Inventors: Fumio Yuse, Mikako Takeda, Shigenobu Namba, Yoshihiro Miyake
  • Publication number: 20110052936
    Abstract: An Al—Zn—Si—Mg alloy coated strip that has Mg2Si particles in the coating microstructure is disclosed. The distribution of Mg2Si particles is such that the surface of the coating has only a small proportion of Mg2Si particles or is at least substantially free of any Mg2Si particles.
    Type: Application
    Filed: March 13, 2009
    Publication date: March 3, 2011
    Applicant: BLUESCOPE STEEL LIMITED
    Inventors: Qiyang Liu, Wayne Renshaw, Joe Williams
  • Patent number: 7892654
    Abstract: Coating steel strips comprising, in % by weight, C: ?1.6%, Mn: 6-30%, Al: ?10%, Ni: ?10%, Cr: ?10%, Si: ?8%, Cu: ?3%, Nb: ?0.6%, Ti: ?0.3%, V: ?0.3%, P: ?0.1%, B: ?0.01%, the rest being iron and unavoidable impurities, and a method of forming steel strips are described. Up to now, such steel strips were not adequately coatable, with a metal coating ensuring outstanding corrosion-resistance and good welding properties. This is ensured by applying an aluminium layer to the steel strip before final annealing and applying the metal coating to said aluminium layer after final annealing.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: February 22, 2011
    Assignee: ThyssenKrupp Steel AG
    Inventors: Harald Hofmann, Manfred Meurer, Bernd Schuhmacher, Slavcho Topalski
  • Publication number: 20110027613
    Abstract: An Al—Zn—Si—Mg alloy coated strip that has Mg2Si particles in the coating microstructure is disclosed. The distribution of Mg2 Si particles is such that a surface region of the coating has only a small proportion of Mg2Si particles or is at least substantially free of any Mg2Si particles.
    Type: Application
    Filed: March 13, 2009
    Publication date: February 3, 2011
    Applicant: BLUESCOPE STEEL LIMITED
    Inventors: Qiyang Liu, Wayne Renshaw, Joe Williams
  • Publication number: 20100323095
    Abstract: A method produces a hardened galvanization of a continuously-running rolled steel strip. The strip is immersed in a coating tank containing a bath of a liquid metal mixture, e.g. zinc and aluminum, to be deposited on the strip, and permanently circulated between the coating tank and a preparation device. The temperature of the liquid mixture is deliberately lowered in order to reduce the iron solubility threshold and sufficiently high for initiating, in the preparation device, the fusion of at least one Zn—Al ingot in an amount necessary for compensating for the liquid mixture used for deposition on the strip. The device is implemented so that the circuit for circulating the liquid mixture is thermally optimized.
    Type: Application
    Filed: February 8, 2008
    Publication date: December 23, 2010
    Applicant: SIEMENS VAI METALS TECHNOLOGIES SAS
    Inventors: Stephane Barjon, Arnaud D'Halluin, Benjamin Grenier
  • Publication number: 20100304034
    Abstract: A continuous galvanizing line uses a coating pot containing a molten zinc bath having bottom dross and further comprises a pump. The pump agitates the bottom dross so the bottom dross interacts with aluminum and converts to top dross, which can be removed without needing to stop the galvanizing line. A reaction vessel may also be used to provide a higher concentration of aluminum to react with the bottom dross.
    Type: Application
    Filed: April 14, 2008
    Publication date: December 2, 2010
    Inventors: Mark A. Bright, Gregory C. Becherer, Robert L. Grodeck
  • Publication number: 20100304183
    Abstract: Hot dip galvanized steel sheet excellent in shapeability and plateability comprised of high strength steel sheet according to the present invention can be provided containing, by mass % about, C: 0.05 to 0.25%, Si: 0.3 to 2.5%, Mn: 1.5 to 2.8%, P: 0.03% or less, S: 0.02% or less, Al: 0.005 to 0.5%, N: 0.0060% or less and the balance of Fe and unavoidable impurities. The exemplary steel sheet can have thereon a galvanized layer containing, e.g., about Al: 0.05 to 10 mass % and Fe: 0.05 to 3 mass % and the balance of Zn and unavoidable impurities. Such exemplary hot dip galvanized steel sheet can have oxides containing Si in an average content of about 0.6 to 10 mass % at the crystal grain boundaries and in the crystal grains at the sheet steel side 5 ?m or less from the interface between the high strength steel sheet and the plating layer and by the presence of Fe—Zn alloy with an average grain size of about 0.5 to 3 ?m at the plating side.
    Type: Application
    Filed: July 31, 2006
    Publication date: December 2, 2010
    Applicant: Nippon Steel Corporation
    Inventors: Kazuhiko Honda, Tetsuo Nishiyama, Yoshihiro Suemune, Takeo Itoh, Koki Tanaka, Yoichi Ikematsu
  • Publication number: 20100291404
    Abstract: In a lead-free hot-dip galvanizing method and its processed product, a pure zinc tablet with a 99.995% purity is used and a conventional zinc solution containing lead is changed to a novel hot-dip galvanizing zinc solution for the hot dip galvanizing process. The hot-dip galvanizing zinc solution has a composition of 98% to 99% of zinc, 0.2% to 1.0% of aluminum and less than 1% of a trace element by weight, so that this hot dip galvanizing process with a lead and cadmium free galvanizing condition is achieved.
    Type: Application
    Filed: April 27, 2007
    Publication date: November 18, 2010
    Inventor: Chien-Tsung Ou
  • Patent number: 7695826
    Abstract: 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: Grant
    Filed: March 30, 2004
    Date of Patent: April 13, 2010
    Assignees: Nippon Steel Corporation, USINOR
    Inventors: Koki Tanaka, Yoichi Ikematsu, Shunichi Hayashi, Hideaki Sawada, Akira Takahashi, Kazuhiko Honda, Masayoshi Suehiro, Yoshihisa Takada
  • Publication number: 20100047617
    Abstract: Steel sheet having a composition of ingredients containing substantially, by mass %, C: 0.005 to 0.200%, Si: 2.50% or less, Mn: 0.10 to 3.00%, N: 0.0100% or less, Nb: 0.005 to 0.100%, and Ti: 0.002 to 0.150% and satisfying the relationship of Ti-48/14×N?0.0005, having a sum of the X-ray random intensity ratios of the {100}<001> orientation and the {110}<001> orientation of a ? sheet thickness part of 5 or less, having a sum of the maximum value of the X-ray random intensity ratios of the {110}<111> to {110}<112> orientation group and the X-ray random intensity ratios of the {211}<111> orientation of 5 or more, and having a high rolling direction Young's modulus measured by the static tension method and a method of production of the same are provided.
    Type: Application
    Filed: November 7, 2007
    Publication date: February 25, 2010
    Inventors: Natsuko Sugiura, Naoki Maruyama, Manabu Takahashi, Yohji Nakamura, Koji Hanya
  • Patent number: 7662438
    Abstract: The invention relates to a method for hot-dip coating a metal strand (1), especially a steel strip, according to which the metal strand (1) is vertically guided through a container (3) accommodating the molten coating metal (2) and through a guide channel (4) disposed upstream thereof. An electromagnetic field is generated in the area of the guide channel (4) by means of at least two inductors (5) disposed at both sides of the metal strand (1) to retain the coating material (2) in the container (3). In order to stabilize the metal strand (1) in a center position in the guide channel (4), an electromagnetic field, superimposing the electromagnetic field of the inductors (5), is generated by means of at least two additional coils (6) disposed at both sides of the metal strand (1).
    Type: Grant
    Filed: November 15, 2003
    Date of Patent: February 16, 2010
    Assignee: SMS Siemag Aktiengesellschaft
    Inventors: Rolf Brisberger, Bernhard Tenckhoff, Holger Behrens, Bodo Falkenhahn, Walter Trakowski, Michael Zielenbach, Robert Jürgens
  • Publication number: 20100021760
    Abstract: A steel strip having a coating of an aluminium-zinc-silicon alloy on at least one surface of the strip is disclosed. The strip is characterised in that the aluminium-zinc-silicon alloy contains less than 1.2 wt. % silicon and also contains magnesium. A method of forming a coating of an aluminium-zinc-silicon alloy on a steel strip is also disclosed. The method includes moving steel strip upwardly through a coating pot containing a bath of an aluminium-zinc-silicon alloy and having an opening in a bottom wall of the pot and forming a coating of the alloy on the strip. The method is characterized by minimizing residence time of steel strip in contact with the aluminium-zinc-silicon alloy bath in the pot.
    Type: Application
    Filed: August 30, 2007
    Publication date: January 28, 2010
    Applicant: BLUESCOPE STEEL LIMITED
    Inventors: Qiyang Liu, Joe Williams, Ross McDowall Smith
  • Publication number: 20100015347
    Abstract: 2.1 The present invention pertains to a hot-dip coating device 100 for coating a metal strip with a molten metal 200. The metal strip is deflected in the molten metal 200 with the aid of a roll 120. The roll is rotatably supported in a support arm 105 by means of a bearing 144. The bearing is installed in a bearing chamber 142. In order to seal the bearing chamber 142 against an undesirable admission of the molten metal 200, a lock is arranged between the bearing chamber 142 and a roll passage 136 toward the molten metal 200 and acted upon with a gaseous medium under a gas pressure in order to seal the lock chamber 132 relative to the molten metal 200. 2.2 In order to lower the maintenance expenditures for the lock, the invention proposes to realize the lock chamber 132 in the form of a diving bell with a channel-shaped outlet 134 that is open relative to the surrounding molten metal 200.
    Type: Application
    Filed: February 5, 2008
    Publication date: January 21, 2010
    Inventor: Peter de Kock
  • Patent number: 7641743
    Abstract: Methods and compositions that serve to both darken a zinc or other active! metal surface and impart corrosion-resistant properties thereto, are disclosed. The compositions include an aqueous solution containing about 0.1 percent to about 5 percent ammonium chloride and about 0.1 percent to about 5 percent ammonium molybdate. The compositions utilize particular ratios of concentrations of ammonium chloride and ammonium molybdate.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: January 5, 2010
    Assignee: Metal Coatings International Inc.
    Inventors: Michelle R. Pearce, Brian G. Straka, Donald J. Guhde, Terry E. Dorsett
  • Publication number: 20090297881
    Abstract: Steel strip provided with a hot dip galvanized zinc alloy coating layer, in which the coating of the steel strip is carried out in a bath of molten zinc alloy, the zinc alloy in the coating consisting of: 0.3-2.3 weight % magnesium; 0.6-2.3 weight % aluminium; optional <0.2 weight % of one or more additional elements; unavoidable impurities; the remainder being zinc in which the zinc alloy coating layer has a thickness of 3-12 ?m.
    Type: Application
    Filed: June 23, 2005
    Publication date: December 3, 2009
    Applicant: CORUS STAAL BV
    Inventors: Theodorus Franciscus Jozef Maalman, Robert Bleeker, Margot Julia Vlot
  • Patent number: 7565739
    Abstract: A conductor is at least partially exposed on the surface of a body. A wiring is formed for connection to the conductor. The conductor is made of a Zn—Al alloy. Heat is then applied to the conductor and the wiring. A chemical reaction is accelerated between the conductor and the wiring based on the heat treatment. This allows oxygen to get released out of the conductor and the wiring. Deoxidation is thus realized on the joint surfaces of the conductor and the wiring. Electric resistance is decreased. Electric conduction can thus be established between the conductor and the wiring.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: July 28, 2009
    Assignee: Fujitsu Limited
    Inventors: Masayuki Kitajima, Ryoji Matsuyama
  • Patent number: 7556865
    Abstract: The subject of the invention is a method for the hot-dip coating, in a liquid bath based on zinc containing aluminum, of a running strip of iron-carbon-manganese austenitic steel, in which said strip is subjected to a heat treatment in a furnace in which an atmosphere that is reducing with respect to iron prevails, in order to obtain a strip covered with a thin manganese oxide layer, and then the strip covered with the thin manganese oxide layer is made to run through said bath, the aluminum content in the bath being adjusted to a value at least equal to the content needed for the aluminum to completely reduce the manganese oxide layer, so as to form, on the surface of the strip, a coating comprising an iron-manganese-zinc alloy layer and a zinc surface layer.
    Type: Grant
    Filed: October 10, 2005
    Date of Patent: July 7, 2009
    Assignee: Arcelor France
    Inventors: Pascal Drillet, Daniel Bouleau
  • Publication number: 20090081444
    Abstract: A porous metal foam body obtainable by applying one or more layers of molten metal to an open-pore non-metallic substrate and allowing the molten metal to penetrate into the open pores of said non-metallic substrate to form a metal foam body whose metal component has at least partially penetrated into said open-pore non-metallic substrate. Said open-pore metal foam body is prepared by a process in which an open-pore non-metallic substrate is provided and coated with a molten metal, and the molten metal penetrates into the open pores of the open-pore non-metallic substrate. The metal foam bodies can be employed in many fields of technology.
    Type: Application
    Filed: May 30, 2006
    Publication date: March 26, 2009
    Inventors: Markus Kattannek, Frank Prenger, Jochen Spriestersbach, Jurgen Wisniewski
  • Publication number: 20090053556
    Abstract: A high-manganese hot-dip coated steel sheet is disclosed which provides high corrosion resistance, high ductility and high strength, mainly used for inner and outer panels of automobiles, and a method of manufacturing the same. The high-manganese hot-dip coated steel sheet includes a substrate steel sheet having a composition of (in weight %) 0.1 to 1.5% of C, 5 to 35% of Mn, and the remainder includes Fe and other unavoidable impurities, and a hot-dip zinc coating layer formed on the substrate steel sheet, the hot-dip zinc coating layer having a composition of (in weight %) 0.1 to 10% of Mn, 5 to 15% of Fe, and the remainder including Zn and other unavoidable impurities.
    Type: Application
    Filed: December 20, 2006
    Publication date: February 26, 2009
    Applicant: POSCO
    Inventors: Il-Ryoung Sohn, Kwang-Geun Chin, Seong-Ju Kim, Myung-Soo Kim, Sung-Kyu Kim
  • Publication number: 20090031950
    Abstract: A heat treatment or heat soak furnace for use in both galvannealing and galvanizing processes including a heating apparatus configured to supply heat and remove heat. The heating apparatus may draw hot air from the exhaust of a direct fire strip annealing furnace, gas burners or electric heat exchangers as necessary. The furnace also may include a plurality of cooling mechanisms in order to ensure heat is removed and the temperature within the furnace regulated. In addition, the furnace may include baffles configured to allow portions of the interior of the furnace to be separated into different temperature zones.
    Type: Application
    Filed: September 6, 2007
    Publication date: February 5, 2009
    Applicant: ISG TECHNOLOGIES INC.
    Inventors: Mitrajyoti Deka, Stavros George Fountoulakis, Ramachandra S. Patil
  • Publication number: 20090014334
    Abstract: This invention involves the technical area of chemical plating in aluminum radiators, referring specifically to the partial chemical plating technique in the inner cavity of aluminum radiator. It undergoes the inner cavity shielding before zinc impregnation and continues chemical oxidization in other parts in the chemical the based on the existing oxidization trough, making the unshielded area unable to sediment a layer of zinc and be plated with nickel and phosphors alloy. Then, it is applied with enclosure technique. The chemical oxidization and enclosure enable the sections other than the inner cavity in the aluminum radiator to be covered with a layer of oxidization film against erosion from acid and alkali, so the sections covered with a oxidization film will not accumulate a layer of zinc nor be plated with nickel and phosphor alloy in the subsequent zinc impregnation and nickel plating. Only the surface of the inner cavity is plated with nickel and phosphor alloy.
    Type: Application
    Filed: October 16, 2007
    Publication date: January 15, 2009
    Applicant: TWD METAL PRODUCTION CO., LTD.
    Inventors: Wenzhen Xie, Donglin Li
  • Patent number: 7413780
    Abstract: Galvannealed steel sheet simultaneously able to achieve excellent workability and high strength and a method of production of the same are provided as an objective, in particular high strength galvannealed steel sheet excellent in workability, comprising high strength steel sheet containing, by mass %, C: 0.05 to 0.15%, Si: 0.3 to 2.0%, Mn: 1.0 to 2.8%, P: 0.03% or less, S: 0.02% or less, Al: 0.005 to 0.5%, and N: 0.0060% or less and a balance of Fe and unavoidable impurities, where, when % C, % Si, and % Mn respectively represent the C, Si, and Mn contents, (% Mn)/(% C)?12 and (% Si)/(% C)?4 being satisfied, on the surface of which having a galvannealed layer containing Al: 0.05 to 0.5 mass % and Fe: 5 to 15 mass % and a balance of Zn and unavoidable impurities, said steel sheet satisfying a relationship of tensile strength F (MPa) and elongation L (%) of L?52?0.035×F.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: August 19, 2008
    Assignee: Nippon Steel Corporation
    Inventors: Kazuhiko Honda, Masaharu Kameda, Yasuharu Sakuma, Akio Saito, Tetsuo Nishiyama, Atsushi Itami
  • Publication number: 20080131729
    Abstract: The present invention provides a highly corrosion-resistant plated steel sheet that can achieve excellent surface smoothness and formability and, according to the process of the present invention, a hot-dip galvanized steel product excellent in surface smoothness and formability having on the steel product surface a zinc alloy plating layer composed of 4 to 22% by mass of Al, 1 to 5% by mass of Mg, 0.000001 to 0.1% by mass of Ti, 0.000001 to 0.5% by mass of Si and the balance of Zn and unavoidable impurities, the plating layer of the plated steel product having a metal structure in which an [Mg2Si phase], an [Al phase], a [Zn2Mg phase] and a [Zn phase] are present in a mixture in the matrix of an [Al/Zn/Zn2Mg ternary eutectic structure], and the plating layer containing a Ti—Al base intermetallic compound in the [Al phase] and/or the [Zn2Mg phase] and/or the [Zn phase], is produced.
    Type: Application
    Filed: October 26, 2007
    Publication date: June 5, 2008
    Applicant: Nippon Steel Corporation
    Inventors: Kazuhiko Honda, Hidetoshi Hatanaka, Hajime Onozawa