Molten Or Fused Coating Patents (Class 428/939)
  • Patent number: 6649282
    Abstract: A tin-plating or aluminum-plating surface treated steel material with excellent corrosion resistance containing an intermetallic compound composed of one or more Group IIa (alkaline earth metal) elements and one or more Group IVb elements in a tin-based plating layer or aluminum-based plating layer on the surface of a steel material. For a tin-based plating layer, the long diameter of the intermetallic compound massive bodies is 1 82 m or greater and the short diameter/long diameter ratio is at least 0.4. For an aluminum-based plating layer, the long diameter of the intermetallic compound massive bodies is 10 &mgr;m or greater and the short diameter/long diameter ratio is at least 0.4.
    Type: Grant
    Filed: December 26, 2001
    Date of Patent: November 18, 2003
    Assignee: Nippon Steel Corporation
    Inventors: Shinichi Yamaguchi, Jun Maki, Teruaki Izaki, Masao Kurosaki, Hisaaki Sato, Hidetoshi Shindo, Seiji Sugiyama
  • Patent number: 6641931
    Abstract: The present invention aims to produce a cold rolled metal coated multi-phase steel, characterized by a tensile strength of at least 500 MPa, a yield ratio (Re/Rm) lower than 0.65 in skinned conditions, lower than 0.60 in unskinned conditions, and with good metal coating adhesion behavior. In the case of the aluminized steel according to the invention, the steel also has superior resistance to temperature corrosion up to 900° C. and excellent mechanical properties at this high temperature. The hot metal coated steel product having a steel composition with a manganese content lower than 1.5%, chrome content between 0.2 and 0.5%, molybdenum content between 0.1 and 0.25%, and a relation between the chrome and molybdenum content as follows Cr+2 Mo higher than or equal to 0.7%, undergoes a thermal treatment in the hot dip metal coating line defined by a soaking temperature between Ac1 and Ac3, a primary cooling speed higher than 25° C./sec and a secondary cooling speed higher than 4° C./sec.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: November 4, 2003
    Assignee: Sidmar N.V.
    Inventors: Serge Claessens, Dirk Vanderschueren
  • Publication number: 20030196732
    Abstract: A corrosion-resistant coated base metal coated with a corrosion resistant alloy. The corrosion resistant alloy includes tin and zinc. The corrosion resistant coated base metal includes a heat created intermetallic layer primarily including copper and zinc.
    Type: Application
    Filed: September 24, 2002
    Publication date: October 23, 2003
    Applicant: The Louis Berkman Company, an Ohio corporation
    Inventors: Jay F. Carey, Mehrooz Zamanzadeh
  • Patent number: 6635359
    Abstract: A Zn—Al—Mg—Si alloy-plated steel material with excellent corrosion resistance, characterized by comprising, in terms of wt %, Al: at least 45% and no greater than 70%, Mg: at least 3% and less than 10%, Si: at least 3% and less than 10%, with the remainder Zn and unavoidable impurities, wherein the Al/Zn ratio is 0.89-2.75 and the plating layer contains a bulky Mg2Si phase; also, a Zn—Al—Mg—Si alloy-plated steel material with excellent corrosion resistance, characterized by comprising, in terms of wt %, Al: at least 45% and no greater than 70%, Mg: at least 1% and less than 5%, Si: at least 0.5% and less than 3%, with the remainder Zn and unavoidable impurities, wherein the Al/Zn ratio is 0.89-2.75 and the plating layer contains a scaly Mg2Si phase.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: October 21, 2003
    Assignees: Nippon Steel Corporation, Daido Steel Sheet Corporation
    Inventors: Masao Kurosaki, Jun Maki, Yasuhide Morimoto, Kazumi Nishimura, Osamu Goto
  • Patent number: 6635313
    Abstract: A method of coating dual phase high strength cold rolled steel having controlled amounts of carbon, manganese, and molybdenum is used as a starting material in a galvanizing/galvannealing process. Conditions in a multi-zone furnace of the galvanizing line can be controlled in a conventional manner while still effectively coating the high strength steel. A dual phase high strength steel product is made having a uniform coating of zinc in spite of the high manganese content of the steel.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: October 21, 2003
    Assignee: ISG Technologies, Inc.
    Inventors: Rajendra Pradhan, C. Ramadeva Shastry
  • Publication number: 20030175547
    Abstract: A corrosion-resistant coated brass metal coated with a corrosion resistant alloy. The corrosion resistant alloy is a tin metal alloy or a tin and zinc metal alloy. The corrosion resistant metal alloy may also include one or more metal additives to improve the coating process and/or to alter the properties of the tin or tin and zinc metal alloy.
    Type: Application
    Filed: January 17, 2003
    Publication date: September 18, 2003
    Applicant: The Louis Berkman Company, an Ohio corporation
    Inventors: Jay F. Carey, Mehrooz Zamanzadeh, Nicholas R. Hesske
  • Publication number: 20030170485
    Abstract: A corrosion-resistant coated brass metal coated with a corrosion resistant alloy. The corrosion resistant alloy is a tin metal alloy or a tin and zinc metal alloy. The corrosion resistant metal alloy may also include one or more metal additives to improve the coating process and/or to alter the properties of the tin or tin and zinc metal alloy.
    Type: Application
    Filed: January 17, 2003
    Publication date: September 11, 2003
    Applicant: The Louis Berkman Company, an Ohio corporation
    Inventors: Jay F. Carey, Mehrooz Zamanzadeh, Nicholas R. Hesske
  • Patent number: 6610422
    Abstract: The method for manufacturing coated steel sheet has the steps of: immersing a steel sheet in a hot-dip coating bath to form an Al—Zn base coating layer containing 20 to 95 mass % Al on the steel sheet, forming a passivated layer on the coating layer; and applying thermal history to the coating layer. The thermal history is applied immediately after the steel sheet left the hot-dip coating bath or in a temperature range of from T(° C.) between 130° C. and 300° C. to 100° C.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: August 26, 2003
    Assignee: NKK Corporation
    Inventors: Toshihiko Ooi, Takafumi Yamaji, Keiji Yoshida, Yuichiro Tanaka, Junichi Inagaki, Masaaki Yamashita, Yasuhiro Majima, Nobuyuki Ishida, Yuichi Fukushima, Norio Inoue, Shinji Hori
  • Patent number: 6610423
    Abstract: The object of the present invention relates to a plated steel material and a method of production the same, having enhanced corrosion resistance and workability required for outdoor and exposed uses such as structures, revetments, fishing nets, fences, etc.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: August 26, 2003
    Assignee: Nippon Steel Corporation
    Inventors: Satoshi Sugimaru, Satoru Tanaka, Seiki Nishida, Akira Takahashi, Atsuhiko Yoshie, Kazumi Nishimura
  • Publication number: 20030152796
    Abstract: A method of producing a metal-coated steel strip includes the steps of forming a metal coating on a steel strip and conditioning the surface of the metal-coated steel strip by smoothing the surface of the strip. The method is characterised in that the conditioning step produces residual stress of no more than 100 MPa in the strip.
    Type: Application
    Filed: February 12, 2002
    Publication date: August 14, 2003
    Inventors: Catherine Clancy, Ian Miles Robertson
  • Patent number: 6582835
    Abstract: Dip-coated ferrite stainless steel sheet usable in the automobile exhaust sector, characterized in that it comprises a steel core with the following composition by weight: 10.5%≦chromium≦20% 0%≦aluminum≦0.6% 0.003%≦carbon≦0.06% 0.003%≦nitrogen≦0.04% 0%≦silicon≦0.6% 0%≦manganese≦0.6% 0%≦sulfur≦0.002% iron and impurities inherent in processing, and a metal coating deposited by dipping the strip in a molten metal bath containing in particular aluminum and at least one rare earth element: cerium, lanthanum, praseodymium, neodymium, mixed metal and/or yttrium.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: June 24, 2003
    Assignee: Usinor
    Inventors: Laurent Antoni, Raphael Craen
  • Publication number: 20030113576
    Abstract: The present invention relates to a cobalt electroless plating bath composition and method of using it for microelectronic device fabrication. In one embodiment, the present invention relates to cobalt electroless plating in the fabrication of interconnect structures in semiconductor devices.
    Type: Application
    Filed: December 19, 2001
    Publication date: June 19, 2003
    Applicant: Intel Corporation
    Inventors: Ramanan V. Chebiam, Valery M. Dubin
  • Patent number: 6579615
    Abstract: This invention provides a plated steel wire with high corrosion resistance and excellent workability, wherein the average composition of the plating alloy in the plated steel wire comprises, in terms of weight percentage, Al: 4-20%, Mg: 0.8-5%, and if necessary one or more from among Si: ≦2%, Na: 0.001-0.1% and Ti: 0.01-0.1%, with the remainder Zn, and an Fe—Zn alloy layer of no greater than 20 &mgr;m thickness is present at the plating-base metal interface; it is produced by coating a steel wire with a molten zinc plating composed mainly of zinc as the first stage and then.coating it with a molten zinc alloy plating with the aforementioned average composition as the second stage. The maximum plating bath immersion time is 20 seconds, and the part of the plated steel wire drawn out from the plating bath is purged with nitrogen gas.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: June 17, 2003
    Assignee: Nippon Steel Corporation
    Inventors: Satoshi Sugimaru, Satoru Tanaka, Seiki Nishida, Akira Takahashi, Atsuhiko Yoshie, Kazumi Nishimura
  • Publication number: 20030099857
    Abstract: A steel for forming a high strength steel sheet contains, in mass %, C: at most 0.04%, Si: at most 0.4%, Mn: 0.5-3.0%, P: at most 0.15%, S: at most 0.03%, Al: at most 0.50%, N: at most 0.01%, and Mo: 0.01-1.0%. Steel sheet formed from the steel is suitable for use as automotive panels.
    Type: Application
    Filed: October 19, 2001
    Publication date: May 29, 2003
    Inventors: Shigeki Nomura, Hiroyuki Nakagawa, Yoshiaki Nakazawa
  • Publication number: 20030091857
    Abstract: A dual phase high strength cold rolled steel having controlled amounts of carbon, manganese, and molybdenum is used as a starting material in a galvanizing/galvannealing process. Conditions in a multi-zone furnace of the galvanizing line can be controlled in a conventional manner while still effectively coating the high strength steel. A dual phase high strength steel product is made having a uniform coating of zinc in spite of the high manganese content of the steel.
    Type: Application
    Filed: November 15, 2001
    Publication date: May 15, 2003
    Applicant: Bethlehem Steel Corporation
    Inventors: Rajendra Pradhan, C. Ramadeva Shastry
  • Patent number: 6558815
    Abstract: The hot dip Zn galvanized steel sheet has excellent balance between tensile strength and ductility and excellent coating adhesion, an average composition of a base steel thereof includes: 0.05-0.25 mass % of C; not more than 2.0 mass % of Si; 1.0-2.5 mass % of Mn; and 0.005-0.10 mass % of Al, wherein the C content at the base steel surface layer portion right under a coating layer is not more than 0.02 mass %, the base steel structure contains not less than 50% of martensite phase, the martensite phase including both tempered martensite phase and fine size martensite phase, and the remaining portion of the base steel structure being formed by ferrite phase and residual austenite phase. A method of producing the hot dip Zn galvanizing steel sheet is described.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: May 6, 2003
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshitsugu Suzuki, Chiaki Kato
  • Publication number: 20030072963
    Abstract: A high Al hot-dip Zn—Al—Mg plated steel sheet is obtained by forming on a steel sheet surface a hot-dip plating layer comprising, in mass %, Al: more than 10 to 22% and Mg: 1-5%, and, optionally, Ti: 0.002-0.1%, B: 0.001-0.045% and Si: 0.005-0.5%. The plating layer exhibits a metallic structure of [primary crystal Al phase] mixed in a matrix of [Al/Zn/Zn2Mg ternary eutectic crystal structure]. Substantially no Zn11Mg2 phase is present in the metallic structure of the plating layer.
    Type: Application
    Filed: August 7, 2002
    Publication date: April 17, 2003
    Inventors: Atsushi Komatsu, Nobuhiko Yamaki, Atsushi Ando
  • Publication number: 20030068521
    Abstract: Disclosed are a steel plate and a hot-dip galvanized steel plate, superior in terms of high electromagnetic shield capacity. The steel plate is prepared from a composition comprising C, N and S in an amount of 0.150% by weight or less in total; Mn in an amount of 0.1 to 1.0% by weight; Si in an amount of 0.5% by weight or less; Al in an amount of 1.0% by weight or less; P in an amount of 0.06% by weight or less; and Fe for the remainder, and inevitable elements, and shows a yield strength of 18 kg/mm2 or higher, and an elongation of 40% or higher. The hot-dip galvanized steel plate is prepared from a composition comprising C, N and S in an amount of 0.0150% by weight or less in total; Mn in an amount of 0.2 to 0.8% by weight; Al in an amount of 0.6% by weight or less; Si in an amount of 0.4% by weight or less; P in an amount of 0.06% by weight or less, with the proviso that the sum of Mn, Al, Si and P amounts to 0.2˜1.0% by weight; and Fe for the remainder, and inevitably present elements.
    Type: Application
    Filed: August 16, 2002
    Publication date: April 10, 2003
    Inventors: Jae-Young Lee, Eel-Young Kim, Jin-Gun Sohn, Noi-Ha Cho, Young-Jin Kwak, Soon-Joo Kwon, Yong-Min Kim, Jung-Sik Lee
  • Patent number: 6544668
    Abstract: Nickel aluminum alloys are welded utilizing a nickel based alloy containing zirconium but substantially free of titanium and niobium which reduces the tendency to crack.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: April 8, 2003
    Assignee: U. T. Battelle, LLC
    Inventors: Michael L. Santella, Jeffrey D. McNabb, Vinod K. Sikka
  • Publication number: 20030059643
    Abstract: Disclosed are a high-strength steel plate with excellent electromagnetic shield capacity and a method for manufacturing the same. The steel plate is manufactured from a composition comprising C, N and S in an amount of 0.0150% by weight or less in total; Mn in an amount of 0.2 to 0.8% by weight; Al in an amount of 0.6% by weight or less; Si in an amount of 0.4% by weight or less; Cu and/or Sn in an amount of 0.1 to 0.6% by weight in total; and Fe for the remainder, and inevitably present elements, whereby the steel plate can show excellent electromagnetic shield effect and hot-dip galvanization property.
    Type: Application
    Filed: August 16, 2002
    Publication date: March 27, 2003
    Inventors: Eel-Young Kim, Jae-Young Lee, Jin-Gun Sohn, Noi-Ha Cho, Young-Jin Kwak, Soon-Joo Kwon, Yong-Min Kim, Jung-Sik Lee
  • Publication number: 20030054195
    Abstract: As to a steel composition, in this invention, Si content is regulated to a given range and Nb and Cu or Ni, Mo are compositively added, and a recrystallization annealing is carried out to form an internal oxide layer just beneath a surface of a steel sheet and a surface oxide simultaneously formed on the surface of the steel sheet is removed by pickling. As a result, the formation of oxides of Si, Mn and the like is considerably decreased on the surface of the steel sheet in a subsequent heating before plating because the above internal oxide layer acts as a diffusion barrier.
    Type: Application
    Filed: May 13, 2002
    Publication date: March 20, 2003
    Inventors: Kazuhide Ishii, Kazuaki Kyono, Chiaki Kato, Kazuo Mochizuki
  • Publication number: 20030035976
    Abstract: The present invention relates to improved coatings for electrical or electronic connectors such as contacts or terminals used in automotive applications. Coatings in accordance with the present invention preferably comprise binary tin-silver coatings consisting of more than 1.0 wt % to about 20 wt %, preferably from 2.0 wt % to 15 wt %, and most preferably from 3.0 wt % to 10 wt %, silver and the balance essentially tin. The coating is preferably applied by immersing the substrate material in a molten tin-silver bath.
    Type: Application
    Filed: November 14, 2001
    Publication date: February 20, 2003
    Inventor: Richard W. Strobel
  • Patent number: 6517954
    Abstract: The invention relates to an aluminium alloy, in particular for a layer of a friction bearing, for example, which, apart from aluminium and smelt-related impurities, additionally contains soft-phase formers, e.g. Sn, Pb, Bi, Sb or similar. The alloy contains added quantities of at least one element from the group of elements consisting of Sc, Y, Hf, Nb, Ta, La, lanthanides and actinides in a maximum of 10% by weight, preferably 4% by weight, in particular between 0.015% by weight and 3.25% by weight, relative to 100% by weight of alloy, the remainder being aluminium with smelt-related impurities.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: February 11, 2003
    Assignee: Miba Gleitlager Aktiengesellschaft
    Inventors: Robert Mergen, Markus Manner
  • Patent number: 6517955
    Abstract: The invention relates to a high strength hot-dip galvanized and galvannealed steel sheets with excellent drawability for press forming and excellent plating adhesion that is useful as a member for automobiles, construction, electric devices and the like, and to a process for its manufacture. According to an embodiment of the invention, the steel sheet contains in terms of weight percent, C: 0.05-0.2%, Si: 0.2-2.0%, Mn: 0.2-2.5%, Al: 0.01-1.5%, Ni: 0.2-5.0%, P: <0.03% and S: <0.02%, the relationship between Si and Al being such that 0.4(%)≦Si+0.8 Al(%)≦2.0% and the remainder consisting of Fe and unavoidable impurities, the volume percentage of the retained austenite is 2-20% and the steel sheet surface wherein the relationship between the Ni and Si, Al in 0.5 &mgr;m of the steel sheet surface layer is such that Ni(%)≦¼ Si+⅓Al(%), has a Zn plating layer comprising Al: ≦1% with the remainder Zn and unavoidable impurities.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: February 11, 2003
    Assignee: Nippon Steel Corporation
    Inventors: Yoshihisa Takada, Masayoshi Suehiro
  • Patent number: 6506503
    Abstract: The invention relates to an intermediate layer, in particular a bonding layer, made from an alloy with an aluminium base, for multi-layered materials with layers of differing composition, in particular friction bearings. The alloy contains added quantities of at least one element from a group of elements consisting of Sc, Y, Hf, Nb, Ta, La, lanthanides and actinides in a maximum of 10% by weight, preferably 4% by weight, in particular between 0.015% by weight and 3.25% by weight, relative to 100% by weight of alloy, the remainder being aluminium with smelt-related impurities.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: January 14, 2003
    Assignee: Miba Gleitlager Aktiengesellschaft
    Inventors: Robert Mergen, Markus Manner
  • Publication number: 20020197508
    Abstract: To provide a steel sheet excellent in painting bake hardenability and anti aging property at room temperature: containing, in mass, 0.0001 to 0.20% of C, 2.0% or less of Si, 3.0% or less of Mn, 0.15% or less of P, 0.015% or less of S, and, in addition, 010% or less of Al and 0.001 to 0.10% of N so as to satisfy the expression 0.52Al/N<5 and, further, one or more of 2.5% or less of Cr, 1.0% or less of Mo and 0.1% or less of V so as to satisfy the expression (Cr+3.5MO+39V) ≧0.1, with the balance consisting of Fe and unavoidable impurities; having the value of BE170, evaluated after applying a 2% tensile deformation and then a heat treatment at 170° C. for 20 min., being 45 MPa or more, and any of the value of BH160, evaluated after applying a 2% tensile deformation and then a heat treatment at 160° C. for 10 min., and the value of BH150, evaluated after applying a 2% tensile deformation and then a heat treatment at 150° C. for 10 min.
    Type: Application
    Filed: April 4, 2002
    Publication date: December 26, 2002
    Inventors: Naoki Yoshinaga, manabu Takahashi, Natsuko Sugiura, Akihiro Miyasaka, Masaaki Sugiyama
  • Patent number: 6492036
    Abstract: The present invention relates to a porous electrode wire for use in electrical discharge machining and the method of manufacturing the same. The wire improves the machining speed at least 15% compared with a conventional zinc coated wire, which results from an increased cooling ability of the wire with a cooling liquid because of the increase in the surface area of the wire having porous surface morphology. Since the surface of the porous wire presents uniform profile of outer periphery rather than surface protrusions, it does not affect machining accuracy. Further, the porous nature of the wire is expected to improve flushability during the electrical discharge machining, providing spaces to eliminate particles of the machining. Therefore, in accordance with the method of the present invention, a zinc coated wire having improved performance of machining speed and flushability compared with a conventional coated wire can be provided without additional processes.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: December 10, 2002
    Inventor: Ki Chul Seong
  • Patent number: 6482535
    Abstract: The present invention relates to a porous electrode wire for use in electrical discharge machining device and the method of manufacturing the same. The wire improves the machining speed at least 15% compared with a conventional zinc coated wire, which results from an increased ability to cool the wire with a cooling liquid, because of the increase in the surface area of the wire due to its having porous surface morphology. Since the surface of the porous wire presents uniform profile of outer periphery rather than surface protrusions, it does not affect machining accuracy. Further, the porous nature of the wire is expected to improve flushability during electrical discharge machining, providing spaces to eliminate particles resulting from the machining. Therefore, in accordance with the method of the present invention, a zinc coated wire having improved performance of machining speed and flushability compared with a conventional coated wire can be provided without additional processes.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: November 19, 2002
    Inventor: Ki Chul Seong
  • Patent number: 6475647
    Abstract: A method for protecting high temperature stainless steel from coking and corrosion at elevated temperatures in corrosive environments, such as during ethylene production by pyrolysis of hydrocarbons or the reduction of oxide ores, by coating the stainless steel with a coating of MCrAlX in which M is nickel, cobalt, iron or a mixture thereof and X is yttrium, hafnium, zirconium, lanthanum or combination thereof deposited onto and metallurgically bonded to the stainless steel by plasma transferred arc deposition of atomized powder of MCrAlX. The coating has a thick, dense, continuous and smooth transition region providing an effective metallurgically bond of the coating with the stainless steel. The coating retains a relatively high aluminum content which permits generation of an adherent alumina layer on the surface, providing good resistance to high temperature oxidation together with good anti-coking and hot erosion resistance properties.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: November 5, 2002
    Assignee: Surface Engineered Products Corporation
    Inventors: Juan Manuel Mendez Acevedo, Chinnia Gounder Subramanian
  • Patent number: 6475643
    Abstract: A plated lead for electrical devices is plated with a Sn-based lead-free alloy containing 0.001-0.1 weight percent of Ga. The formation of oxides in a hot dipping bath can be suppressed by the presence of 0.001-0.1 weight percent of P in the alloy.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: November 5, 2002
    Assignee: Senju Metal Industry Co., Ltd.
    Inventors: Tomohide Hasegawa, Ichiro Nawata
  • Publication number: 20020160221
    Abstract: An object of the present invention is to provide a hot-dip galvanized steel sheet which is excellent in adhesion with a hot-dip galvanized zinc layer, and has high tensile strength and good formability even when a steel sheet containing Si and Mn in relatively larger amounts is used as a basis steel sheet. The hot-dip galvanized steel sheet is composed of: a basis steel sheet containing Si in an amount of 0.05 to 2.5% and Mn in an amount of 0.2 to 3%, by mass; a Fe plated layer formed on the basis steel sheet; and a hot-dip galvanized zinc layer formed on the surface layer of the basis steel sheet via the Fe plated layer, wherein oxides containing Si and/or Mn are discontinuously dispersed in the vicinity of the interface between the basis steel sheet and the Fe plated layer.
    Type: Application
    Filed: April 10, 2002
    Publication date: October 31, 2002
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hiroyuki Takeda, Kouki Ikeda, Ikurou Hashimoto
  • Patent number: 6468674
    Abstract: A method of coating of steel products such as plate and sheet using an aluminum-zinc coating alloy includes modifying the coating bath with a particulate compound constituent in effective amounts to decrease the spangle facet size of the coated product, improve tension bend rust stain performance, and coated product paintability. Constituents include borides such as titanium boride and aluminum borides, carbides such as titanium carbide, and aluminides such as titanium aluminide. The method produces a coated steel product that does not require temper rolling for painting.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: October 22, 2002
    Assignee: Bethlehem Steel Corporation
    Inventors: Fritz J. Friedersdorf, Erin T. McDevitt, H. E. George Rommal
  • Publication number: 20020136920
    Abstract: A method of coating of steel products such as plate and sheet using an aluminum-zinc coating alloy includes modifying the coating bath with a particulate compound constituent in effective amounts to decrease the spangle facet size of the coated product, improve tension bend rust stain performance, improve coated surface appearance when brushed, and coated product paintability. Constituents include borides such as titanium boride and aluminum borides, carbides such as titanium carbide, and aluminides such as titanium aluminide. The method produces a coated steel product that does not require temper rolling for painting.
    Type: Application
    Filed: March 25, 2002
    Publication date: September 26, 2002
    Applicant: Bethlehem Steel Corporation
    Inventors: Erin T. McDevitt, Scott A. Kriner
  • Patent number: 6440582
    Abstract: A method of coating of steel products such as plate and sheet using an aluminum-zinc coating alloy includes modifying the coating bath with a particulate compound constituent in effective amounts to decrease the spangle facet size of the coated product, improve tension bend rust stain performance, improve coated surface appearance when brushed, and coated product paintability. Constituents include borides such as titanium boride and aluminum borides, carbides such as titanium carbide, and aluminides such as titanium aluminide. The method produces a coated steel product that does not require temper rolling for painting.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: August 27, 2002
    Assignee: Bethlehem Steel Corporation
    Inventors: Erin T. McDevitt, Scott A. Kriner
  • Patent number: 6440584
    Abstract: A hot-dip galvanized steel sheet is produced by rough rolling a steel, finish rolling the rough rolled steel at a temperature of Ar3 point or more, coiling the finish rolled steel at a temperature of 700° C. or less, and hot-dip galvanizing the coiled steel at a pre-plating heating temperature of Ac1 to Ac3. A continuous hot-dip galvanizing operation is performed by soaking a pickled strip at a temperature of 750 to 850° C., cooling the soaked strip to a temperature range of 600° C. or less at a cooling rate of 1 to 50° C. per second, hot-dip galvanizing the cooled strip, and cooling the galvanized strip so that the residence time at 400 to 600° C. is within 200 seconds. The steel sheet has a structure consisting essentially of ferrite and martensite.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: August 27, 2002
    Assignee: NKK Corporation
    Inventors: Yasunobu Nagataki, Toshiaki Urabe, Fusato Kitano, Akio Kobayashi, Kunikazu Tomita, Shunsaku Node, Kozo Harada, Shogo Sato, Toru Inazumi
  • Patent number: 6436556
    Abstract: The invention relates to a method and a device for the production of a strip-like metallic composite material by the high-temperature dip coating of a metallic carrier strip, consisting of a metallurgic vessel for receiving the liquid depositing material, through which the carrier strip is capable of being led in a preferably vertical run-through direction by means of pairs of rollers arranged on the entry and the exit side, and of a preheating device for the carrier strip, said preheating device being located upstream of the metallurgic vessel. At the same time, the preheating device (41) is arranged in a housing (61) which is arranged in the entry region upstream of the metallurgic vessel (11) and surrounds the carrier strip (21) and into which the medium coming from a media supply (52) is capable of being introduced via at least one feed (51) led into the housing.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: August 20, 2002
    Assignees: SMS Demag AG, Thyssen Krupp Stahl AG
    Inventors: Wolfgang Bleck, Rolf Bünten, Frank Friedel, Oliver Picht, Wolfgang Reichelt, Wilhelm Schmitz, Dieter Senk, Paul Splinter, Ulrich Urlau
  • Patent number: 6423389
    Abstract: An object is to provide a metallic-conduit-armored type linear member in which a linear member and the like contained in a metallic conduit do not become damaged and a defect in the metallic conduit can be repaired, a metallic conduit for armoring the linear member, and a method and a system for manufacturing the metallic-conduit-armored type linear member. The method comprises a basic process (I) in which a metallic tape (1) is formed into a tubular member, a seam of the tubular member is joined to complete a sealed metallic conduit, and a metallic-conduit-armored type linear member (12) is formed by loading a linear member (5) inside the metallic conduit, and a metallic coating process (II) in which a metallic coating layer is formed on an outer surface of the sealed metallic conduit by performing plating by using a room-temperature molten-salt electrolytic bath subsequent to the basic process (I).
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: July 23, 2002
    Assignee: OCC Corporation
    Inventor: Yasunori Yoshie
  • Publication number: 20020092831
    Abstract: The present invention relates to a porous electrode wire for use in electrical discharge machining and the method of manufacturing the same. The wire improves the machining speed at least 15% compared with a conventional zinc coated wire, which results from an increased cooling ability of the wire with a cooling liquid because of the increase in the surface area of the wire having porous surface morphology. Since the surface of the porous wire presents uniform profile of outer periphery rather than surface protrusions, it does not affect machining accuracy. Further, the porous nature of the wire is expected to improve flushability during the electrical discharge machining, providing spaces to eliminate particles of the machining. Therefore, in accordance with the method of the present invention, a zinc coated wire having improved performance of machining speed and flushability compared with a conventional coated wire can be provided without additional processes.
    Type: Application
    Filed: January 3, 2002
    Publication date: July 18, 2002
    Inventor: Ki Chul Seong
  • Publication number: 20020081452
    Abstract: The high tension steel sheet includes 0.1 wt. % or more of silicon and has a zinc-plating layer thereon.
    Type: Application
    Filed: November 8, 2001
    Publication date: June 27, 2002
    Applicant: Kawasaki Steel Corporation
    Inventors: Seiji Nakajima, Kazuaki Kyono, Chiaki Kato
  • Patent number: 6410163
    Abstract: The present invention provides a high strength thin excellent workability and galvanizability, having a composition comprising from 0.01 to 0.20 wt. % C, up to 1.0 wt. % Si, from 1.0 to 3.0 wt. % Mn, up to 0.10 wt. % P, up to 0.05 wt. % S, up to 0.10 wt. % Al, up to 0.010 wt. % N, up to 1.0 wt. % Cr, from 0.001 to 1.00 wt. % Mo, and the balance Fe and incidental impurities, wherein a band structure comprising a secondary phase has a thickness satisfying the relation Tb/T≦0.005 (where, Tb: average thickness of the band structure in the thickness direction of steel sheet; T: steel sheet thickness), and a manufacturing method thereof, and a manufacturing method of a high strength hot-dip galvanized steel sheet or a high strength galvannealed steel sheet applying hot-dip galvanizing or further galvannealing, and giving an excellent workability, a high tensile strength, and excellent galvanizability, coating adhesion and corrosion resistance.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: June 25, 2002
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshitsugu Suzuki, Kazunori Osawa, Chiaki Kato, Yoichi Tobiyama, Kei Sakata, Osamu Furukimi, Akio Shinohara
  • Patent number: 6387541
    Abstract: A titanium aluminide turbine blade (10) includes an aerofoil (12), a platform (14) and a root (16). A protective coating (2) is applied to the aerofoil (12) and the platform (14) of the turbine blade (10). The protective coating (2) comprises austenitic stainless steel. A chromium oxide layer (22) is formed on the protective coating (2). The protective coating (20) and chromium oxide layer (22) provides oxidation and sulphidation resistance for the titanium aluminide article (10).
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: May 14, 2002
    Assignee: Rolls-Royce plc
    Inventors: Simon Gray, Clive B. Ponton, Michael H. Jacobs, Hugh E. Evans
  • Patent number: 6379820
    Abstract: A hot-dip Zn—Al—Mg plated steel sheet good in corrosion resistance and surface appearance that is a hot-dip Zn-base plated steel sheet obtained by forming on a surface of a steel sheet a hot-dip Zn—Al—Mg plating layer composed of Al: 4.0-10 wt. %, Mg: 1.0-4.0 wt. % and the balance of Zn and unavoidable impurities, the plating layer having a metallic structure including a primary crystal Al phase or a primary crystal Al phase and a Zn single phase in a matrix of Al/Zn/Zn2Mg ternary eutectic structure. To obtain a plating layer possessing this metallic structure, the cooling rate of the plating layer adhering to a steel strip extracted from a plating bath and the plating bath temperature are appropriately controlled in a continuous hot-dip plating machine and/or appropriate amounts of Ti and B are added to the bath.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: April 30, 2002
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Atsushi Komatsu, Takao Tsujimura, Kouichi Watanabe, Nobuhiko Yamaki, Atsushi Andoh, Toshiharu Kittaka
  • Publication number: 20020018909
    Abstract: A metallic sheet with an aluminum coating, the coating having an internal layer of iron/aluminum/silicon alloys, and an external layer, thicker, of an aluminum-based phase and secondarily of phases in the form of needies or elongated lamellae. The projection of the length of all needles or lamellae in a direction perpendicular to the plane of the external layer is less than the thickness of this layer. This structure, which is obtained by a thermal treatment of the external layer at a temperature of 570-660° C. notably for less than 15 sec, considerably decreases the risks of cracking.
    Type: Application
    Filed: September 4, 2001
    Publication date: February 14, 2002
    Applicant: Sollac
    Inventors: Didier Mareuse, Therese Six, Pierre Jean Krauth
  • Patent number: 6342310
    Abstract: A hot-dip galvanized steel sheet composed of a basis steel sheet containing Si in an amount of 0.05-2.5 mass % and Mn in an amount of 0.2-3 mass % and a hot-dip galvanized zinc layer formed on the surface thereof, wherein said hot-dip galvanized zinc layer is formed in such a way that there is an Si—Mn enriched phase which is found, by observation under a scanning electron microscope or a transmission electron microscope, in the vicinity of the interface in a region no shorter than 50 &mgr;m in the cross section perpendicular to the interface between the basis steel sheet and the hot-dip galvanized zinc layer, said Si—Mn enriched phase containing more than twice as much Si and/or Mn as the basis steel sheet and extending over a length no more than 80% of the length of the interface observed. This hot-dip galvanized steel sheet is free of bare spots even in the case where the basis steel sheet contains Si and Mn in a comparatively large amount and hence is liable to suffering bare spots.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: January 29, 2002
    Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Ikurou Hashimoto, Kenji Saitou, Hiroyuki Takeda, Koichi Makii, Shunichi Hashimoto, Takayuki Yamamoto, Masahiro Nomura, Kouki Ikeda, Masafumi Shimizu
  • Patent number: 6329075
    Abstract: An aluminum alloy composite material includes a higher strength aluminum alloy core material layer and at least one cladding aluminum alloy material layer having a higher electrical conductivity than the core material. The cladding layer is positioned adjacent to the core and the composite is adapted for particular application in heat exchangers where brazing is conducted under controlled atmospheres with special flux materials. The core material has an electrical conductivity less than 50% IACS and the cladding layer has an electrical conductivity greater than 50% IACS. The cladding layer can be on one or both surfaces of the core layer. The thickness of the cladding layer can range between about 2.5 and 40% of the overall composite thickness depending on whether one or more cladding layers are employed. The cladding layer also has a corrosion potential more negative than the core layer for enhanced corrosion resistance.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: December 11, 2001
    Assignee: Reycan, L.P.
    Inventors: Ralph M. Nener, Scott W. Haller
  • Patent number: 6316127
    Abstract: A P- and Ti-added galvannealed steel sheet superior in ductility, and a process for production thereof. It is made of a cold-rolled steel sheet and has alloyed hot-dip galvanizing on the surface thereof, said cold-rolled steel sheet having the chemical composition (in terms of wt %) of C: less than 0.010%, Si: no more than 0.5%, Mn: 1.0˜3.0%, P: no more than 0.20%, S: no more than 0.01%, Al: 0.005˜0.10%, N: no more than 0.0050%, Ti/48−(C/12+N/14+S/32): 0.0003˜0.0018 with the remainder being chiefly Fe, and said cold-rolled steel sheet being characterized by &rgr;1≦107 and &rgr;2≦5×105, where &rgr;1 is the number of precipitates whose particle diameter (D) is in the range of 10 nm≦D<100 nm and &rgr;2 is the number of precipitates whose particle diameter (D) is in the range of 100 nm≦D.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: November 13, 2001
    Assignee: Kobe Steel, Ltd.
    Inventors: Shushi Ikeda, Koichi Makii, Yosuke Shindo, Shunichi Hashimoto, Takahiro Kashima
  • Patent number: 6309761
    Abstract: A process in which a steel is dipped in an aluminum-based bath wherein the composition and mean temperature of the bath and the immersion temperature of the steel are adjusted to obtain, in the immersion zone of the steel, a local bath temperature and composition resulting in an equilibrium with the solid phase designated as &thgr;≡FeAl3. Dipping is performed at a temperature higher than the temperatures normally employed in the art and a coating is obtained having at the interface with the steel an alloy layer significantly smaller in thickness than the art. The coating obtained better resists cracking and corrosion.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: October 30, 2001
    Assignee: Sollac
    Inventors: Philippe Guesdon, Jean-Pierre Godin, Eric Lesueur
  • Patent number: 6306527
    Abstract: A hot-dip galvanized steel sheet which is produced from a cold-rolled steel sheet, as a base steel sheet, consisting essentially of C: 0.010-0.06 wt %, Si: no more than 0.5 wt %, Mn: no less than 0.5 wt % and less than 2.0 wt %, P: no more than 0.20 wt %, S: no more than 0.01 wt %, Al: 0.005-0.10 wt %, N: no more than 0.005 wt %, Cr: no more than 1.0 wt %, Mn+1.3Cr: 1.9-2.3 wt %, Fe: remainder, and having a structure composed of ferrite and a second phase containing martensite, said second phase in the structure accounting for no more than 20% in terms of area and martensite in the second phase accounting for no less than 50%, and which has a zinc-plated layer formed on the surface thereof by hot-dip galvanizing or hot-dip galvannealing. A process for production of said hot-dip galvanized steel sheet. This steel sheet has a composite structure containing martensite and yet it has a low strength (no higher than 500 MPa) and also has good strength-ductility balance.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: October 23, 2001
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Shushi Ikeda, Koichi Makii, Yosuke Shindo, Shunichi Hashimoto, Takahiro Kashima, Hiroshi Akamizu, Masahiro Nomura
  • Patent number: 6306523
    Abstract: The present invention relates to a porous electrode wire for use in electrical discharge machining and the method of manufacturing the same. The wire improves the machining speed at least 15% compared with a conventional zinc coated wire, which results from an increased cooling ability of the wire with a cooling liquid because of the increase in the surface area of the wire having porous surface morphology. Since the surface of the porous wire presents uniform profile of outer periphery rather than surface protrusions, it does not affect machining accuracy. Further, the porous nature of the wire is expected to improve flushability during the electrical discharge machining, providing spaces to eliminate particles of the machining. Therefore, in accordance with the method of the present invention, a zinc coated wire having improved performance of machining speed and flushability compared with a conventional coated wire can be provided without additional processes.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: October 23, 2001
    Inventor: Ki Chul Seong
  • Publication number: 20010031377
    Abstract: A hot-dip galvanized steel sheet composed of a basis steel sheet containing Si in an amount of 0.05-2.5 mass % and Mn in an amount of 0.2-3 mass % and a hot-dip galvanized zinc layer formed on the surface thereof, wherein said hot-dip galvanized zinc layer is formed in such a way that there is an Si-Mn enriched phase which is found, by observation under a scanning electron microscope or a transmission electron microscope, in the vicinity of the interface in a region no shorter than 50 &mgr;m in the cross section perpendicular to the interface between the basis steel sheet and the hot-dip galvanized zinc layer, said Si-Mn enriched phase containing more than twice as much Si and/or Mn as the basis steel sheet and extending over a length no more than 80% of the length of the interface observed. This hot-dip galvanized steel sheet is free of bare spots even in the case where the basis steel sheet contains Si and Mn in a comparatively large amount and hence is liable to suffering bare spots.
    Type: Application
    Filed: January 29, 2001
    Publication date: October 18, 2001
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Ikurou Hashimoto, Kenji Saitou, Hiroyuki Takeda, Koichi Makii, Shunichi Hashimoto, Takayuki Yamamoto, Masahiro Nomura, Kouki Ikeda, Masafumi Shimizu