Next To Fe-base Component (e.g., Galvanized) Patents (Class 428/659)
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Patent number: 5897967Abstract: A galvannealed steel sheet suited for use in automobiles, and a manufacturing method thereof. The steel sheet has tensile strength of 340 MPa or higher and paint bake hardenability of 10 MPa or higher, and excellent resistance to powdering when press formed, and excellent resistance to chipping in cold regions. The base metal of the galvannealed steel sheet consists essentially of C: 0.004-0.008%, Si: 2.5.times.P (%)-0.20%, Mn: 0.10-0.40%, P: 0.017-0.045%, sol. Al: 0.003-0.08%, Ti: 0.002-0.015%, Nb: 0.010-0.030 %, wherein Ti (%)+Nb (%): 0.012-0.035%. A steel sheet of the chemical composition described above is hot-dip galvanized, heated up to a Fe--Zn alloying temperature at a heating velocity of 20.degree. C./sec or higher, and upon completion of the Fe--Zn alloying process, cooled down from the Fe--Zn alloying temperature at a cooling velocity of 10.degree. C./sec or higher.Type: GrantFiled: July 16, 1997Date of Patent: April 27, 1999Assignee: Sumitomo Metal Industries, Ltd.Inventors: Masahiko Hori, Toshio Nakamori, Yoshiaki Nakazawa, Yasuyuki Tanno
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Patent number: 5882803Abstract: The invention is a high-strength hot dip galvannealed steel sheet having excellent press formability and plating properties by utilizing Si as a strengthening component, specifying an interrelation between Si and Mn and further specifying an alloying ratio of hot dip galvannealed layer, which comprises C: 0.0005-0.0050%, Si: 0.1-2.5%, Mn: 0.1-2.5%, Ti: 0.003-010%, Nb: 0.003-0.10%, B: 0.005-0.0080%, P: 0.040-0.18%, S: not more than 0.008%, Al: 0.005-0.10%, and N: not more than 0.0060 wt %, provided that Si and Mn satisfy the following equation, and the remainder being Fe and incidental impurities, and has a hot dip galvannealed layer formed on a surface of the steel sheet and having a Fe content of 9-12%, wherein said equation is:1.5 (% Mn)-2.ltoreq.(% Si).ltoreq.2(% Mn) (1).Type: GrantFiled: September 28, 1995Date of Patent: March 16, 1999Assignee: Kawasaki Steel CorporationInventors: Kazuhiro Seto, Kei Sakata, Toshiyuki Kato, Shigeru Umino, Chiaki Kato
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Patent number: 5861218Abstract: A zinciferous plated steel sheet which comprises a steel sheet, at least one zinciferous plating layer formed on at least one surface of the steel sheet, and an Fe--Ni--O film as an uppermost layer formed on the zinciferous plating layer. The total quantity of metallic elements in the Fe--Ni--O film is within a range of from 10 to 1,500 mg/m.sup.2, and the oxygen content in the Fe--Ni--O film is within a range of from 0.5 to under 30 wt. %. The ratio of the iron content (g/l) relative to the total quantity of the iron content (g/l) and the nickel content (g/l) in the Fe--Ni--O film is preferably within a range of from over 0 to under 1.0.Type: GrantFiled: December 5, 1995Date of Patent: January 19, 1999Assignee: NKK CororationInventors: Michitaka Sakurai, Akira Hiraya, Junichi Inagaki, Takayuki Urakawa, Satoshi Hashimoto, Toru Imokawa, Masaaki Yamashita, Toyofumi Watanabe
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Patent number: 5853850Abstract: A lubricant film coated steel sheet having excellent phosphatability, in accordance with the present invention, is a lubricant film coated steel sheet produced by forming a coating containing silicic acid or silicate on a steel sheet or a plated steel sheet, wherein the surface roughness of the steel sheet or the plated steel sheet is 0.5 to 1.5 .mu.m as the centerline-average roughness RA and the PPI (cut-off value of 1.25 .mu.m) thereof is 75 to 300; and the content of silicic acid or silicate in the coating is 1 to 200 mg/m.sup.2 as corrected into dried SiO.sub.2 weight or the coating ratio of the coating is 1 to 60%.Type: GrantFiled: November 8, 1996Date of Patent: December 29, 1998Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Masatoshi Iwai, Hiroaki Nakano
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Patent number: 5849423Abstract: A method for manufacturing a zinciferous plated steel sheet, comprises: forming a zinciferous plating layer on a steel sheet; and forming an Fe--Ni--O film on the zinciferous plating layer. The Fe--Ni--O film is formed by carrying out electrolysis with the steel sheet as a cathode in an aqueous solution, dipping the steel sheet in an aqueous solution, or spraying a mist on a surface of the zinciferous plating layer.Type: GrantFiled: November 18, 1996Date of Patent: December 15, 1998Assignee: NKK CorporationInventors: Takayuki Urakawa, Toru Imokawa, Michitaka Sakurai, Jun-ichi Inagaki, Masaaki Yamashita, Shuji Nomura
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Patent number: 5849408Abstract: When a hot-dip zinc plating layer, which contains Al, is applied on rimmed steel having an Si level of less than 0.05% by weight or less, by the two-stage plating method, appearance failure can be prevented by setting the plating conditions as follows: in a first zinc bath consisting of zinc of 99.7% purity or more or in a second zinc bath which consists of zinc with 99.7% purity by weight or more and 0.05% or less of Al at a temperature of from more than 460.degree. C. to 490.degree. C. and for a dipping time of from 1 minute to 1.5 minutes; and, in a second zinc bath consisting of zinc of 99.7% purity by weight and from 2 to 10% by weight or less of Al at a temperature of from 400.degree. C. to less than 430.degree. C. and for a dipping time of from 0.5 minute to 1.5 minutes. This plating condition provides a plating structure that the Zn, Fe and Al are present in the essentially entire portion of the plating layer.Type: GrantFiled: June 17, 1996Date of Patent: December 15, 1998Assignee: Nippon Mining & Metals Co., Ltd.Inventor: Noriaki Sugawara
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Patent number: 5846660Abstract: Disclosed is an organic-composite coated steel plate comprising a steel plate provided with a plated layer made of zinc or a zinc-base alloy, a chromate-treated layer formed on said plated layer with a deposition amount ranging from 1 to 200 g/m.sup.2 in terms of metal chromium, and a resin film formed on said chromate-treated layer with a thickness ranging from 0.1 to 5 .mu.m, wherein said resin film has (A) selected from the group consisting of a reaction product (I) between an ethylene-series ionomer resin and an epoxy-group containing compound, a mixture of an ethylene-series ionomer resin and an epoxy emulsion, a mixture of the reaction product (I) and an epoxy emulsion, and a mixture of the reaction product (I), an ethylene-series ionomer resin and an epoxy emulsion, in an amount of 60 to 99% by weight, and (B) fine silica particles in an amount of 1 to 40% by weight.Type: GrantFiled: January 6, 1997Date of Patent: December 8, 1998Assignee: NKK CorporationInventors: Kenichi Sasaki, Yoshiharu Sugimoto, Masaaki Yamashita
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Patent number: 5834128Abstract: An organic film-coated plated steel sheet is disclosed which includes a base steel sheet, a zinc-base plated layer disposed thereon, and an organic film layer formed by cathodic polymerization of one or more monomers and superposed as an outermost layer on the zinc-base plated layer. The steel is excellent in corrosion resistance, weldability, electrodeposition paintability or paint adhesion and, thus, is suitable as a rust-proof steel sheet particularly for use in automobile bodies. Also disclosed is a process for producing that steel with less production equipment and reduced cost.Type: GrantFiled: August 28, 1996Date of Patent: November 10, 1998Assignee: Kawasaki Steel CorporationInventors: Kyoko Hamahara, Shuichi Asahina, Hisatada Nakakoji, Tomokatsu Katagiri, Kazuo Mochizuki
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Patent number: 5834084Abstract: A low particulating circuit board for a disc drive flex assembly, and a method for forming the same, are disclosed. The circuit board comprises a conductive metal substrate which has sufficient thickness to provide mechanical support and backplane suppression for the circuit board and to efficiently sink heat generated by preamplifier circuitry housed by the circuit board. The substrate has dielectric layers formed on the top and bottom surfaces thereof, the dielectric layers comprising an epoxy interleaved with nonparticulating fibers, such as tetrafluorethylene (TFE) fibers. Traces and pads are provided on the dielectric layers to provide the necessary electrical connections for the preamplifier circuitry. A plurality of circuit boards are formed from a panel and subsequently cut therefrom. Particulate generation is minimized through the use of the metal substrate, as well as recession of the substrate and the solder masks to reduce the amount of material cut during the cutting operation.Type: GrantFiled: June 5, 1997Date of Patent: November 10, 1998Assignee: Seagate Technology, Inc.Inventor: Mark S. Maggio
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Patent number: 5827618Abstract: This invention provides a rust-proofed steel sheet for a fuel tank including an alloy layer containing at least one of Ni, Fe, Zn and Sn and deposited on the surface of a steel sheet to a thickness of 2 .mu.m per surface, and a Sn--Zn alloy plating layer consisting of 40 to 99 wt % of Sn and the balance of iron, containing not greater than 20 crystals/0.25 mm.sup.2 of zinc crystals having a major diameter of not greater than 250 .mu.m and deposited on the alloy layer to a thickness of 2 to 50 .mu.m per surface. The to-be-plated steel sheet to which the plating layer is applied has a composition consisting of C.ltoreq.0.1%, Si.ltoreq.0.1%, Mn: 0.05 to 1.2%, P.ltoreq.0.040%, Al<0.1% and if necessary, at least one of B, Ti, Nb and Cr, and the balance of Fe and unavoidable impurities. This invention provides also a production method of a rust-proofing steel sheet for a fuel tank comprising the steps of applying Ni--Fe type pre-plating to an annealed steel sheet in a quantity of 0.1 to 3.0 g/m.sup.Type: GrantFiled: November 27, 1996Date of Patent: October 27, 1998Assignee: Nippon Steel CorporationInventors: Yashichi Oyagi, Takayuki Omori, Masahiro Fuda, Ken Sawada, Nobuyoshi Okada
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Patent number: 5795660Abstract: An organic composite coated steel sheet having an excellent corrosion resistance in a rust-contaminated environment. The sheet contains a chromate film on a zinc or zinc alloy plated sheet and an organic resin film on the chromate film. The resin film has a thickness of 0.2-2.0 microns. The resin film contains (a) a base resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to the ends of molecules of an epoxy resin, (b) a polyfunctional polyisocyanate compound having at least six isocyanate groups per molecule, and (c) a rust-preventing additive of a sparingly soluble chromate or a mixture of silica and a sparingly soluble chromate.Type: GrantFiled: December 26, 1996Date of Patent: August 18, 1998Assignees: NKK Corporation, Kansai Paint Co., Ltd.Inventors: Naoto Yoshimi, Takahiro Kubota, Takashi Ishiyama, Masaaki Yamashita, Yasuhiko Haruta
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Zinc coated steel sheet and strip having improved formability and surface quality and method thereof
Patent number: 5795661Abstract: A method for improving the formability of zinc coated steel sheet, and the product produced therefrom. The steps of the method include applying to the zinc coating an oxalic acid solution in an amount that will form a zinc oxalate film having a coating weight in a range of s about 10 mg/ft.sup.2 to about 100 mg/ft.sup.2. A lubricant is applied to the zinc oxalate film, and the lubricant is adsorbed by the zinc oxalate film to provide a lubricated zinc oxalate film that is bonded to the zinc coating. The method produces an improved zinc coated sheet product having a tightly formed lubricated coating structure resistant to galling in the die steels of a forming press. The improved zinc coated sheet product having a lubricated zinc oxalate film improves formability and reduces the coefficient of friction during the forming operations that shape the zinc coated steel sheet or strip into a finished product shape.Type: GrantFiled: July 10, 1996Date of Patent: August 18, 1998Assignee: Bethlehem Steel CorporationInventor: Berta M. Taffinger -
Patent number: 5723210Abstract: An organic composite coated steel sheet having excellent chromate dissolution resistance, wet adhesion, and corrosion resistance before and after working. The steel sheet comprises a chromate-silica film on at least one face of a zinc or zinc base alloy plated steel sheet, the silica-added chromate film having about 5 to 500 mg/m.sup.2 in terms of metal Cr content and being formed from a chromate solution containing about 25 to 70 wt % of Cr.sup.+6 based upon total Cr content. A resin coating film is adhered to the chromate-silica film and is formed from an aqueous paint. The aqueous paint includes an aqueous anionic resin and/or an aqueous nonionic resin, a reducing agent, and a water-dispersed silica. The resin coating film is deposited in a dry weight amount of about 0.1 to 3 g/m.sup.2.Type: GrantFiled: May 29, 1996Date of Patent: March 3, 1998Assignees: Kawasaki Steel Corporation, Dai Nippon Toryo Co. Ltd.Inventors: Shigeko Sujita, Takahiro Kusakabe, Kyoko Hamahara, Kazuo Mochizuki, Hiroyuki Tanabe, Masanori Nagai, Nobuyoshi Kato, Osamu Ogawa
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Patent number: 5722039Abstract: A wire, generally made of steel and used to make composite elements of elastomeric material, is submitted to an electrodeposition process in an electrolytic bath for being coated with a zinc/cobalt alloy in which the average cobalt content is lower than 1%. In the coating thickness made of the zinc/cobalt alloy, different cobalt concentrations exist, that is a 1% to 3% concentration at the area close to the metal and a concentration as low as 0.5% maximum at the overlying area. Adhesion promoters for example consisting of cobalt neodecanate, added to the elastomeric material, promote the adhesion of said elastomeric material to the wire.Type: GrantFiled: February 24, 1995Date of Patent: February 24, 1998Assignee: Pirelli Coordinamento PneumaticiInventor: Gurdev Orjela
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Patent number: 5714049Abstract: A post plating or post coating method for improving formability and weldability properties in sheet steel product having a protective zinc or zinc alloy layer formed on at least one surface thereof. The steps of the method comprise immersing the sheet steel product into a bath containing at least zinc to apply the protective layer, removing the sheet steel product from the bath, the sheet steel product having a protective zinc or zinc alloy layer formed on at least one surface thereof, and applying an alkaline solution to the protective layer to form a zinc oxide layer thereon, the alkaline solution being applied at a location outside the bath.Type: GrantFiled: December 16, 1996Date of Patent: February 3, 1998Assignee: Bethlehem Steel CorporationInventors: C. Ramadeva Shastry, Stavros G. Fountoulakis, Elmer J. Wendell
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Patent number: 5691071Abstract: A metal wire, having a steel core and being provided with a layer of cladding of a zinc/manganese alloy containing between 5% and 80% of manganese. The wire is used as a reinforcement structure for tires or other products of elastomer material. Several embodiments of a process for applying the cladding on the steel core by electrodeposition of the zinc/manganese alloy are also described.Type: GrantFiled: July 27, 1995Date of Patent: November 25, 1997Assignee: Pirelli Coordinamento Pneumatici S.p.A.Inventors: Pietro Cavallotti, Federico Pavan
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Patent number: 5690755Abstract: The present invention provides a cold-rolled steel sheet and a hot-dip galvanized steel sheet having good bake hardenability, non-aging properties at room temperature and good formability and a process for producing the same. An extra low carbon steel or an extra low carbon steel containing at least one element selected from Ti and Nb is annealed at a temperature of not lower than the AC.sub.3 transformation point to bring the structure after annealing to a structure of low-temperature transformation products. This makes it possible to provide a steel sheet that has a combination of high paint-bake hardenability and non-aging properties at room temperature and is excellent also in formability in respect of average r value (deep drawability) and elongation (punch stretchability). In particular, with respect to paint-bake hardenability, a BH property on a high level up to about 10 kgf/mm.sup.Type: GrantFiled: September 11, 1996Date of Patent: November 25, 1997Assignee: Nippon Steel CorporationInventors: Naoki Yoshinaga, Kohsaku Ushioda, Osamu Akisue, Yoshikazu Matsumura, Kunio Nishimura
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Patent number: 5670265Abstract: A steel component is provided on its surface with an electroplated anti-corrosive coating of a metallic material and has a hardness of at least 650 HV, the anti-corrosive coating being thinner than the surface roughness which the hardened component had before the application of the protective coating. Advantageously, the component is a rolling bearing component with a surface roughness R.sub.z of 0.3 to 9.0 .mu.m and a coating thickness of 0.1 to 3.0 .mu.m. Preferably, the anti-corrosive coating comprises a zinc-cobalt alloy, a zinc-iron alloy or a zinc-nickel alloy coating. It is possible to add iron, tin, copper or chromium to the coating composition.Type: GrantFiled: February 9, 1995Date of Patent: September 23, 1997Assignee: Ina Walzlager Schaeffler KGInventors: Karl Ludwig Grell, Reiner Woltmann
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Patent number: 5654059Abstract: The present invention relates to the fabrication of thick, three-dimensional structures comprising discontinuous thermoset pitch fiber, and to composites comprising such structures embedded in a matrix material such as a thermoset resin, ceramic, metal or carbon. Carbon-carbon fiber composite articles produced from porous carbon preforms obtained by carbonizing such structures followed by infiltration with pyrolytic carbon using CVD processes exhibit surprisingly high through-thickness thermal conductivity and isotropic properties.Type: GrantFiled: August 5, 1994Date of Patent: August 5, 1997Assignee: Amoco CorporationInventor: Daniel H. Hecht
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Patent number: 5648177Abstract: A Zn--Mg binary coating layer formed on a steel sheet has the tri-layered structure that the first sublayer composed of a Zn--Mg alloy having Mg concentration of 0.5 wt. % or less, the second sublayer composed of a Zn--Mg alloy having Mg concentration of 7 wt. % or more and the third sublayer composed of a Zn--Mg alloy having Mg concentration of 0.5 wt. % or less are successively laminated. The coating layer may have the penta-layered structure wherein sublayers composed of a Zn--Mg alloy having Mg concentration of 2-7 wt. % are additionally interposed between the high-Mg and low-Mg sublayers. A Zn--Fe or Zn--Fe--Mg alloy layer may be formed at the boundary between the substrate steel and the coating layer. The adhesion ratio of the first sublayer to the top sublayer is preferably 1.2 or more, while the high-Mg sublayer is preferably conditioned to the mixed structure of a Zn.sub.2 Mg phase with a Mg-dissolved Zn phase.Type: GrantFiled: February 27, 1996Date of Patent: July 15, 1997Assignee: Nisshin Steel Co., Ltd.Inventors: Yasushi Fukui, Masanori Matsuno, Hiroshi Tanaka, Tadaaki Miono, Kazushi Sakamoto, Yasumi Ariyoshi, Minoru Saito
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Patent number: 5646076Abstract: Wear resistant devices and methods of their manufacture in which the intended function or result of the devices is to influence operational coefficients of friction. The devices are made of fiber-reinforced polymer composite materials produced by nonwoven textile and plastics industries' materials and methods.Type: GrantFiled: June 6, 1995Date of Patent: July 8, 1997Inventor: David N. Bortz
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Patent number: 5641578Abstract: A black steel sheet having a sufficiently small coating thickness to allow the welding of the steel sheet, and yet exhibiting an excellently black surface. It is a steel sheet having a surface plated with zinc or a zinc alloy, and carrying a chromate film formed on its plated surface, and a black film formed on the chromate film from a composition comprising specific proportions of a thermosetting resin and a black dye, which are both soluble in an organic solvent, and having a sufficiently small thickness. The composition may further contain a solid lubricant, or a granular rust-inhibitive pigment, or both.Type: GrantFiled: July 10, 1995Date of Patent: June 24, 1997Assignee: NKK CorporationInventors: Naoto Yoshimi, Masaaki Yamashita, Toshiyuki Ookuma, Tatsuya Miyoshi, Toyofumi Watanabe, Tsutomu Watanabe
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Patent number: 5631095Abstract: Multilayered coated corrosion resistant steel material having a galvanized layer on one surface thereof, an electro-deposited layer on said galvanized layer formed from a zinc-based alloy containing nickel and having a thickness of one to six microns; and a resin layer on said electrodeposited layer.Type: GrantFiled: October 12, 1995Date of Patent: May 20, 1997Assignee: Usui Kokusai Sangyo Kaisha Ltd.Inventor: Toshio Kanasashi
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Patent number: 5629099Abstract: An alloying-treated iron-zinc alloy dip-plated steel sheet excellent in press-formability, having, on the surface thereof, numerous fine concavities which satisfy the following conditions: (1) that the number of fine concavities having a depth of at least 2 .mu.m is within a range of from 200 to 8,200 per mm.sup.2 of the plating layer, and (2) that the total opening area per unit area of the fine concavities in the plating layer is within a range of from 10 to 70% of the unit area. The above-mentioned plated steel sheet is manufactured by subjecting a cold-rolled steel sheet to a zinc dip-plating treatment in a zinc dip-plating bath having an aluminum content of from 0.05 to 0.30 wt. %, in which the temperature region causing an initial reaction for forming an iron-aluminum layer is limited within a range of from 500.degree. to 600.degree. C., an alloying treatment in which an alloying treatment temperature is limited within a range of from 480.degree. to 600.degree. C., and a temper-rolling treatment.Type: GrantFiled: December 19, 1994Date of Patent: May 13, 1997Assignee: NKK CorporationInventors: Michitaka Sakurai, Kenji Tahara, Junichi Inagaki, Toyofumi Watanabe
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Patent number: 5618634Abstract: A zinc or zinc alloy electroplated metal sheet comprises a metal sheet having, on at least one surface thereof, a composite zinc or zinc alloy plated coating formed by electroplating with zinc or a zinc alloy in a plating solution which contains at least one organic compound selected from the group consisting of alkynes, alkynols, amines and salts thereof, thio compounds, heterocyclic compounds, and aromatic carboxylic acids and salts thereof. The composite plated coating has a coating weight of 0.5-200 g/m.sup.2 and contains 0.001-10 wt % of co-deposited carbon. The electroplated metal sheet has improved post-painting corrosion resistance, press formability, and spot weldability.Type: GrantFiled: June 23, 1994Date of Patent: April 8, 1997Assignee: Sumitomo Metal Industries, Ltd.Inventors: Yasushi Hosoda, Masanari Kimoto, Shinya Hikino, Tsutomu Yoshida, Kiyoyuki Fukui
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Patent number: 5616424Abstract: A corrosion-resistant metal strip and method for making the same which is essentially lead free and is not highly reflective. The coating on the metal strip is a metallic coating comprised of tin and a very low weight percentage of lead. The coating alloy may also include antimony, bismuth, copper, zinc to improve the coating process and/or improve the properties of the tin coating. A metal layer may also applied to the surface of the metal strip prior to applying the metallic alloy coating.Type: GrantFiled: November 1, 1995Date of Patent: April 1, 1997Assignee: The Louis Berkman CompanyInventors: Jay F. Carey, II, Mehrooz Zamanzadeh
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Patent number: 5597656Abstract: A corrosion-resistant metal strip and method for making the same which is essentially lead free and is not highly reflective. The coating on the metal strip is a two-phase metallic coating comprised of tin and zinc and a very low weight percentage of lead. The coating alloy may also include antimony, bismuth and copper to improve the coating process and/or improve the properties of the tin and zinc coating. A metal layer may also applied to the surface of the metal strip prior to applying the metallic alloy coating.Type: GrantFiled: May 8, 1995Date of Patent: January 28, 1997Assignee: The Louis Berkman CompanyInventors: Jay F. Carey, II, Mehrooz Zamanzadeh
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Patent number: 5591534Abstract: A galvanized steel sheet has a coating layer of protective material applied to its surface where the steel sheet has been roughened prior to application of the protective material. The improvement is characterized by the roughened steel surface having a pattern which ensures desired consistent quantity of coating during application of the protective material. The pattern provided on the sheet surface has a multitude of depressions defined by a plurality of ridges. The upper surfaces of the ridges defining a plane for each side of the steel sheet, where the ridges have a surface area less than 1/4 the nominal surface area of the sheet side. Each depression has a depth defined by a continuous side wall extending into the plane of the sheet side. The side wall slopes downwardly of the plane at an angle greater than 45.degree..Type: GrantFiled: March 25, 1994Date of Patent: January 7, 1997Assignee: Sorevco, Inc.Inventors: Andre F. Vigeant, Alain Bernard
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Patent number: 5580634Abstract: The present invention provides a backing for a coated abrasive article, wherein the backing includes a tough, heat resistant, thermoplastic binder material, and an effective amount of a fibrous reinforcing material distributed throughout the thermoplastic binder material. The tough, heat resistant, thermoplastic binder material and the fibrous reinforcing material together form a hardened composition that will not substantially deform or disintegrate during use.Type: GrantFiled: September 26, 1994Date of Patent: December 3, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventors: George M. Stout, James G. Homan, John R. Mlinar, Larry R. Wright
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Patent number: 5545482Abstract: A two-phase stainless steel wire rope having a high fatigue resistance and a high corrosion resistance, containing two-phase stainless steel wires of 0.03 to 0.1% by weight of C, 0.33 to 1.0% by weight of Si, 0.65 to 1.5% by weight of Mn, 0.019 to 0.04% by weight P, 0.004 to 0.03% by weight of S, 18.21 to 30% by weight of Cr, 3.10 to 8.0% by weight of Ni, 0.1 to 3.0% by weight of Mo, with the balance being Fe, and 30.0 to 80.0% by volume of ferrite, which wire rope has a means slenderness ratio, M.sub.R, of 4 to 20 by wire drawing.Type: GrantFiled: December 16, 1994Date of Patent: August 13, 1996Assignee: Shinko Kosen Kogyo Kabushiki KaishaInventors: Yukio Yamaoka, Kishio Tamai, Hiroshi Masutani
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Patent number: 5525431Abstract: A zinc-base galvanized sheet steel which comprises zinc-base plated sheet steel and, formed on the plating layer surface, an inorganic covering layer which contains at least one inorganic oxide in an amount of 1-500 mg/m.sup.2 in terms of the weight of metallic elements exclusive of oxygen and optionally contains at least one oxoacid or inorganic oxide colloid in an amount of 1-500 mg/m.sup.2 and further, as desired for improving weldability, a Zn oxide film formed between the inorganic covering layer and the zinc-base plating layer, and the process for producing said galvanized sheet steel.Type: GrantFiled: August 19, 1993Date of Patent: June 11, 1996Assignee: Nippon Steel CorporationInventors: Tatsuya Kanamaru, Junichi Morita, Katsutoshi Arai, Shinichi Suzuki
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Patent number: 5510196Abstract: Zn--Cr alloy plated steel sheets have excellent corrosion resistance. It has now been found that the phase structures of Zn--Cr alloy platings are such that they comprise yet to be known phases .eta.x, .delta.x and .GAMMA.x. Furthermore, these phases when taken either singly or with two or more phases being mixed together, exhibit the following characteristics (1)-(6). The characteristics of the respective phases are also identified below.______________________________________ (1) .eta.x Resistance to cosmetic corrosion (2) .GAMMA.x Formability (3) .eta.x + .delta.x Chipping resistance (4) .eta.x + .GAMMA.x Corrosion resistance in the as-formed state (5) .delta.x + .GAMMA.x Water resistant secondary adherence of coating (6) .eta.x + .delta.x + .GAMMA.x Perforation corrosion resistance .eta.x: Hexagonal crystal a = 2.66-2.74 .ANG. c = 4.61-4.95 .ANG. .delta.x: Hexagonal crystal a = 2.72-2.78 .ANG. c = 4.43-4.60 .ANG. .GAMMA.x: Cubic crystal a = 3.00-3.06 .ANG.Type: GrantFiled: March 8, 1994Date of Patent: April 23, 1996Assignee: Kawasaki Steel CorporationInventors: Hiroki Nakamaru, Tohru Fujimura, Hiroaki Ohnuma, Kazuo Mochizuki, Nobuyuki Morito, Michio Katayama
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Patent number: 5500290Abstract: A surface treated steel sheet comprises: a steel sheet containing C, Si, Mn, P, S, Ni, Ti, Cu and B; a diffused alloy layer containing Fe, Ni, and P; and a zinc coating layer formed on the diffused alloy layer.A method for producing a surface treated steel sheet comprises the steps of: preparing a steel sheet; coating the steel sheet with a Ni-P coating layer; heat-treating the steel sheet coated with the Ni-P coating layer; and forming a zinc coating layer on the diffused alloy layer.Type: GrantFiled: June 24, 1994Date of Patent: March 19, 1996Assignee: NKK CorporationInventors: Satoru Udagawa, Masaki Abe, Satoru Ando, Yasuhiro Matsuki, Toyofumi Watanabe, Yukimitsu Shiohara, Masaya Morita, Akimasa Kido
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Patent number: 5496652Abstract: A zinc-plated steel sheet having a resin coating film formed on the surface is obtained by forming a chromate treating layer on the surface of a base steel sheet plated with zinc or a zinc alloy, said chromate treating layer being deposited in an amount of 1 to 200 mg/m.sup.2 in terms of metal chromium, followed by forming a resin coating film on the chromate treating layer in a thickness of 0.1 to 5 .mu.m, said resin coating film being based on a composite resin material including a resin composition and at most 50% by weight of silica, said resin composition containing an ethylene-based ionomer resin and a silane compound having in the molecule a single silicon atom and 2 to 4 silyl ether bonds and/or its condensate.Type: GrantFiled: April 27, 1993Date of Patent: March 5, 1996Assignee: NKK CorporationInventors: Kenichi Sasaki, Toshiyuki Okuma, Masaaki Yamashita, Toyofumi Watanabe
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Patent number: 5492772Abstract: A corrosion-resistant colored architectural material which is essentially lead free and is not highly reflective. The coating on the material is a two-phase metallic coating comprised of a large weight percentage of zinc and a relatively large weight percentage of tin. The tin-zinc coating may also include nickel. The tin-zinc composition provides for both a highly corrosive-resistant coating which protects the surface of the architectural material from oxidation and also produces a gray, earth tone colored which is not highly reflective.Type: GrantFiled: February 13, 1995Date of Patent: February 20, 1996Assignee: The Louis Berkman CompanyInventors: Jay F. Carey, II, Mehrooz Zamanzadeh
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Patent number: 5491036Abstract: A corrosion-resistant metal strip and method for making the same which is essentially lead free and is not highly reflective. The coating on the metal strip is a metallic coating comprised of tin and a very low weight percentage of lead. The coating alloy may also include antimony, bismuth, copper, zinc to improve the coating process and/or improve the properties of the tin coating. A metal layer may also applied to the surface of the metal strip prior to applying the metallic alloy coating.Type: GrantFiled: March 13, 1995Date of Patent: February 13, 1996Assignee: The Louis Berkman CompanyInventors: Jay F. Carey, II, Mehrooz Zamanzadeh
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Patent number: 5491035Abstract: A corrosion-resistant architectural material which is essentially lead free and is not highly reflective. The coating on the material is a two-phase metallic coating comprised of zinc and tin. The tin-zinc coating may also include aluminum, antimony, bismuth, copper, magnesium, nickel and/or titanium to improve the coating process and/or improve the properties of the tin-zinc coating.Type: GrantFiled: November 30, 1994Date of Patent: February 13, 1996Assignee: The Louis Berkman CompanyInventors: Jay F. Carey, II, Mehrooz Zamanzadeh
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Patent number: 5482787Abstract: An organic composite coated steel strip having well-balanced corrosion resistance, coating properties including adaptability to electrophoretic coating and water resistant secondary coating adherence, and spot weldability is provided. The organic composite coated strip comprises a zinc or zinc base alloy plated steel substrate; a chromate later on the substrate containing up to 70% by weight of Cr.sup.6+ based on the total chromium quantity, the chromate layer being coated in a weight of 5 to 500 mg/m.sup.2 in terms of elemental chromium; and an organic composite layer on the chromate layer mainly comprising silica and an organic high molecular weight resin. In the organic composite coated steel strip, (a) silica has an average primary particle diameter of 5 to 30 nm; (b) silica is agglomerated into agglomerates of an average thickness of 0.2 to 2 .mu.m and an average apparent diameter of 5 to 300 .mu.m; and (c) the organic composite layer has been coated to a dry weight of 0.1 to 3 g/m.sup.2.Type: GrantFiled: October 12, 1993Date of Patent: January 9, 1996Assignee: Kawasaki Steel CorporationInventors: Shigeko Sujita, Nobuyuki Morito
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Patent number: 5470403Abstract: The present invention provides a cold rolled steel sheet and a hot dip zinc-coated cold rolled steel sheet excellent in paint bake hardenability, non-aging properties and formability, and a process for producing the same. In the present invention, an extremely low carbon steel or extremely low carbon steel containing at least one element selected from the group consisting of Ti and Nb is used as a base steel, and Mn and Cr are positively added thereto, whereby the resultant steel has a mixed structure after annealing. Accordingly, there can be obtained a steel sheet having both a high paint bake hardenability and non-aging properties, and being excellent in formability such as an average r-value (deep drawability). With regard to the paint bake hardenability, the present invention may provide a cold rolled steel sheet and a hot dip zinc-coated cold rolled steel sheet to which paint bake hardening may be optionally imparted in an amount as large as about 10 kgf/mm.sup.Type: GrantFiled: February 18, 1994Date of Patent: November 28, 1995Assignee: Nippon Steel CorporationInventors: Naoki Yoshinaga, Kohsaku Ushioda, Osamu Akisue, Kunio Nishimura
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Patent number: 5470667Abstract: A corrosion-resistant colored architectural material which is essentially lead free and is not highly reflective. The coating on the material is a two-phase metallic coating comprised of a large weight percentage of zinc and a relatively large weight percentage of tin. The tin-zinc composition provides for both a highly corrosive-resistant coating which protects the surface of the architectural material from oxidation and also produces a gray, earth tone colored which is not highly reflective.Type: GrantFiled: November 14, 1994Date of Patent: November 28, 1995Assignee: The Louis Berkman CompanyInventors: Jay F. Carey, II, Mehrooz Zamanzadeh
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Patent number: 5455122Abstract: A corrosion-resistant, environmentally-safe gasoline tank for motor vehicles, wherein the components of the gasoline tank are made of a metal material having a hot-dipped coating of zinc-tin applied to the exposed surfaces of the metal material. The tin-zinc coating includes at least 15 weight percent tin and at least 7 weight percent zinc. The tin-zinc alloy may also include metal additives such as nickel, antimony and/or bismuth.Type: GrantFiled: January 17, 1995Date of Patent: October 3, 1995Assignee: The Louis Berkman CompanyInventors: Jay F. Carey, II, Mehrooz Zamanzadeh
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Patent number: 5455121Abstract: A steel material for colored springs is formed with a metallic deposit on the surface. The metallic deposit contains copper, zinc, and chromium. In an annealing process, copper and zinc diffuse in the deposit to exhibit a gold color tone while chromium is oxidized to exhibit a dark gray color tone. The combination of these color tones exhibits a beautiful black color tone which is distinguishable from a normal spring. The deposit improves the formability in the spring shaping process.Type: GrantFiled: March 11, 1994Date of Patent: October 3, 1995Assignee: Shinko Kosen Kogyo Kabushiki KaishaInventors: Masao Yamada, Keiji Hattori, Hirofumi Ueki, Takashi Kubo
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Patent number: 5449563Abstract: Reinforcing steel bar (rebar) in reinforced concrete is inhibited from corrosion by attaching a zinc wire, such as by welding, soldering or co-extrusion, along the length of the rebar. Zinc wire attached to the rebar provides galvanic protection to the steel to prevent iron corrosion and subsequent deterioration of the reinforced concrete.Type: GrantFiled: May 20, 1994Date of Patent: September 12, 1995Assignee: Cominco Ltd.Inventor: Xiaoge G. Zhang
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Patent number: 5447802Abstract: In connection with a process of implementing galvanizing and galvannealing on steel strips containing highly oxidizable elements such as Si, Mn, P, Ti, Nb, Al, Ni, Cu, Mo, V, Cr, and B, after annealing in a continuous line or implementing electroplating after annealing, the present invention provides a method for restraining non-plating at low cost in a stable manner and a surface treated steel strip having minimal non-plating. By applying on at least one surface of a steel strip a Fe plating having a coating weight of 0.1-10 g/m.sup.2 and an oxygen content of 0.1-10 wt %, followed by annealing and then zinc or zinc alloy plating, there is obtained a surface treated steel strip having minimal plating defects which includes a Fe plating layer immediately below a zinc or zinc alloy plating layer and a steel alloying element concentrated stratum immediately below the Fe plating layer. The Fe plating may be formed using an electroplating bath which contains 0.1-10 g/l of Fe.sup.Type: GrantFiled: April 12, 1994Date of Patent: September 5, 1995Assignee: Kawasaki Steel CorporationInventors: Yoichi Tobiyama, Chiaki Kato, Nobuyuki Morito, Shigeru Umino
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Patent number: 5445791Abstract: An alloy for after-fabrication hot-dip galvanizing containing mainly Zn to which is added Bi up to the solubility limit to improve drainage of the Zn alloy.Type: GrantFiled: March 30, 1994Date of Patent: August 29, 1995Assignee: Noranda, Inc.Inventor: Martin Gagne
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Patent number: 5431984Abstract: The invention is directed to composite preforms which comprise reinforcing fiber deposited in grooves pre-formed in a metal or ceramic foil.Type: GrantFiled: December 11, 1990Date of Patent: July 11, 1995Assignee: Avco CorporationInventors: Steven D. Keck, Harlan L. Woods
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Patent number: 5429882Abstract: A corrosion-resistant colored architectural material which is essentially lead free and is not highly reflective. The coating on the material is a two-phase metallic coating comprised of a large weight percentage of zinc and a relatively large weight percentage of tin. The tin-zinc coating may also include nickel and copper. The tin-zinc composition provides for both a highly corrosive-resistant coating which protects the surface of the architectural material from oxidation and also produces a gray, earth tone colored which is not highly reflective.Type: GrantFiled: June 15, 1994Date of Patent: July 4, 1995Assignee: The Louis Berkman CompanyInventors: Jay F. Carey, II, Mehrooz Zamanzadeh
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Patent number: 5429880Abstract: An organic composite coated steel sheet having a high cosmetic corrosion resistance and excellent image clarity which is desired on, for example, the outside of an outer plate forming an automobile body. The steel sheet has a chromate layer formed on the surface of a zinc or a zinc alloy plate steel sheet, and containing a specific weight of chromium, and an organic resin film formed on the chromate layer from a mixture in specific proportions of a blocked urethane-modified epoxy resin and a rust-preventing additive, and having a thickness of 0.2 to 2 microns. The resin is a mixture in specific proportions of a modified epoxy resin (A) which consists of an epoxy resin and a polyfunctional amine, and may further contain a monoisocyanate, or phosphoric acid, and a blocked urethane (B) which consists of a high molecular weight polyol having a molecular weight of 400 or more, a polyisocyanate and a blocking agent. A process for manufacturing the strip is also disclosed.Type: GrantFiled: March 9, 1993Date of Patent: July 4, 1995Assignee: NKK CorporationInventors: Takahiro Kubota, Masaaki Yamashita, Toyofumi Watanabe, Yoshio Kikuta, Kimio Kobori, Hideaki Ogata
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Patent number: 5422192Abstract: A steel product (or copper-plated steel product) with heat-resistant, corrosion-resistant plating layers which are composed of a 0.2-10 .mu.m thick nickel plating layer formed on said steel product, a Zn-Ni alloy plating layer formed on said nickel plating layer, and a chromate film formed on said Zn-Ni alloy plating layer.Type: GrantFiled: September 7, 1994Date of Patent: June 6, 1995Assignee: Usui Kokusai Sangyo Kaisha Ltd.Inventors: Teruhisa Takahashi, Seiya Takahata
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Patent number: 5413835Abstract: A magnetic recording medium includes a successively formed uneven underlayer and magnetic layer. In the process of forming the underlayer, grains of an alloy, whose melting point is in the range of approximately 100 degrees centigrade to approximately 350 degrees centigrade, are deposited on a substrate by using either an evaporation or a sputtering method, while maintaining the substrate temperature at a temperature which allows molten spheres of the alloy to be formed. The preferred alloys include Zn, Mg, Al, In, and Sn systems whose melting points fall within the above-mentioned temperature range. The preferred substrate temperatures are not higher than the melting point of the alloy to be deposited plus 50 degrees centigrade, and most preferably, temperatures equal to approximately the melting point of the alloy to be deposited minus 20 degrees centigrade. The result is a magnetic recording medium suitable for practical use which can be fabricated at a low cost.Type: GrantFiled: February 26, 1993Date of Patent: May 9, 1995Assignee: International Business Machines CorporationInventors: Yoshihiro Ikeda, Shinji Takayama