Patents by Inventor Yuka Komori
Yuka Komori has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8709550Abstract: In a process for manufacturing a coated steel sheet such as a coated electromagnetic steel sheet using a water-based coating liquid containing an organic resin, to perform steps subsequent to an annealing step continuously at high speed without causing appearance defects such as coating unevenness; to provide an electromagnetic steel sheet having an insulating film thereon, in which properties of the film are satisfactory, superior weldability and punchability can be obtained without deteriorating the space factor, and the satisfactory film properties can be maintained even if the electromagnetic steel sheet having the insulating film thereon is temper-rolled. A coating liquid is applied onto an untreated steel sheet. The applied liquid is heated on the side close to the steel sheet in such a manner that the time elapsed until the steel sheet temperature is increased to 100° C. after the application is completed is 10 seconds or less, thereby drying the coating liquid.Type: GrantFiled: January 24, 2003Date of Patent: April 29, 2014Assignee: JFE Steel CorporationInventors: Yuka Komori, Masaki Kawano, Kazumichi Sashi, Akio Fujita
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Publication number: 20100233484Abstract: An electrical steel sheet has an insulation coating having excellent corrosion resistance and punchability even without containing chromium and is prepared by applying a coating liquid on the surface of an electrical steel sheet, followed by baking the applied coating liquid, which coating liquid contains 100 parts by weight of polysiloxane polymer prepared by copolymerizing polysiloxane with one or more resins selected from acrylic resin, styrene resin, vinyl acetate resin, polyester resin, urethane resin, polyethylene resin, polypropylene resin, polyamide resin, polycarbonate resin, phenol resin, alkyd resin, and epoxy resin, and 1 to 50 parts by weigh of one or more compounds selected from melamine, isocyanate, silane coupling agent, and oxazoline, as a cross-linking agent.Type: ApplicationFiled: December 26, 2006Publication date: September 16, 2010Applicant: JFE STEEL CORPORATIONInventors: Tomofumi Shigekuni, Kazumichi Sashi, Masaaki Kohno, Yuka Komori
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Publication number: 20100221549Abstract: An insulation coating containing a composite resin composed of polysiloxane and a polymer containing carbon is formed on the surface of an electrical steel sheet, thus obtaining an electrical steel sheet having an insulation coating that gives corrosion resistance and punchability equivalent to or higher than those of Cr-containing insulation coating.Type: ApplicationFiled: December 26, 2006Publication date: September 2, 2010Applicant: JFE Steel Corporation,Inventors: Tomofumi Shigekuni, Kazumichi Sashi, Masaaki Kohno, Yuka Komori
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Patent number: 7226658Abstract: A magnetic steel sheet with an insulating coating having a good punchability, high sliding performance, excellent handleability in processing, and good uniformity and adhesiveness is achieved by forming a chromium-free insulating coating containing 20 parts by mass or more and 90 parts by mass or less of fluorocarbon resin as a top layer coating of the magnetic steel sheet, and preferably making the kinetic friction coefficient of a surface of the insulating coating 0.3 or less.Type: GrantFiled: April 10, 2002Date of Patent: June 5, 2007Assignee: JFE Steel CorporationInventors: Kazumichi Sashi, Yuka Komori, Masaki Kawano, Atsuhito Honda
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Publication number: 20050064107Abstract: In a process for manufacturing a coated steel sheet such as a coated electromagnetic steel sheet using a water-based coating liquid containing an organic resin, to perform steps subsequent to an annealing step continuously at high speed without causing appearance defects such as coating unevenness; to provide an electromagnetic steel sheet having an insulating film thereon, in which properties of the film are satisfactory, superior weldability and punchability can be obtained without deteriorating the space factor, and the satisfactory film properties can be maintained even if the electromagnetic steel sheet having the insulating film thereon is temper-rolled. A coating liquid is applied onto an untreated steel sheet. The applied liquid is heated on the side close to the steel sheet in such a manner that the time elapsed until the steel sheet temperature is increased to 100° C. after the application is completed is 10 seconds or less, thereby drying the coating liquid.Type: ApplicationFiled: January 24, 2003Publication date: March 24, 2005Inventors: Yuka Komori, Masaki Kawano, Kazumichi Sashi, Akio Fujita
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Patent number: 6638633Abstract: Electrical steel sheet can be produced by baking at low temperatures and is capable of stress relief annealing and has excellent solvent resistance and has an insulating coating containing substantially no chromium components harmful to environment; the electrical steel sheet has an insulating coating comprising a resin and an inorganic colloid which is silica, alumina or alumina-containing silica.Type: GrantFiled: December 12, 1997Date of Patent: October 28, 2003Assignee: Kawasaki Steel CorporationInventors: Yuka Komori, Katuro Yamaguchi, Keiji Sato
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Publication number: 20030175524Abstract: A magnetic steel sheet with an insulating coating having a good punchability, high sliding performance, excellent handleability in processing, and good uniformity and adhesiveness is achieved by forming a chromium-free insulating coating containing 20 parts by mass or more and 90 parts by mass or less of fluorocarbon resin as a top layer coating of the magnetic steel sheet, and preferably making the kinetic friction coefficient of a surface of the insulating coating 0.3 or less.Type: ApplicationFiled: December 9, 2002Publication date: September 18, 2003Inventors: Kazumichi Sashi, Yuka Komori, Masaki Kawano, Atsuhito Honda
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Patent number: 6531001Abstract: Non-oriented magnetic steel sheets, which are mainly used as materials for iron cores for use in electric apparatuses, have a low iron loss and a high magnetic flux density at the same time. The non-oriented magnetic steel sheet comprises from about 1.5 to about 8.0 weight % Si, from about 0.005 to about 2.50 weight % Mn, and not more than about 50 ppm each of C, S, N, O, and B, in which a crystal orientation parameter <&Ggr;> is 0.200 or less. In addition, the average crystal grain diameter is preferably from about 50 to about 500 &mgr;m, and an areal ratio of crystal grains on a surface of the steel sheet is preferably 20% and less, in which crystal plane orientations of the crystal grains are within 15° from the <111> axis. In addition, the non-oriented magnetic steel sheet preferably contains small amounts of elements such as Al, Sb, Ni, Sn, Cu, P, and Cr. The manufacturing method for the non-oriented magnetic steel is also described.Type: GrantFiled: May 8, 2002Date of Patent: March 11, 2003Assignee: Kawasaki Steel CorporationInventors: Yasuyuki Hayakawa, Mitsumasa Kurosawa, Masaki Kawano, Michiro Komatsubara, Yuka Komori, Kazuaki Tamura
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Publication number: 20030024606Abstract: Non-oriented magnetic steel sheets, which are mainly used as materials for iron cores for use in electric apparatuses, have a low iron loss and a high magnetic flux density at the same time. The non-oriented magnetic steel sheet comprises from about 1.5 to about 8.0 weight % Si, from about 0.005 to about 2.50 weight % Mn, and not more than about 50 ppm each of C, S, N, O, and B, in which a crystal orientation parameter <&Ggr;> is 0.200 or less. In addition, the average crystal grain diameter is preferably from about 50 to about 500 &mgr;m, and an areal ratio of crystal grains on a surface of the steel sheet is preferably 20% and less, in which crystal plane orientations of the crystal grains are within 15° from the <111> axis. In addition, the non-oriented magnetic steel sheet preferably contains small amounts of elements such as Al, Sb, Ni, Sn, Cu, P, and Cr. The manufacturing method for the non-oriented magnetic steel is also described.Type: ApplicationFiled: May 8, 2002Publication date: February 6, 2003Applicant: KAWASAKI STEEL CORPORATIONInventors: Yasuyuki Hayakawa, Mitsumasa Kurosawa, Masaki Kawano, Michiro Komatsubara, Yuka Komori, Kazuaki Tamura
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Patent number: 6436199Abstract: Non-oriented magnetic steel sheets, which are mainly used as materials for iron cores for use in electric apparatuses, have a low iron loss and a high magnetic flux density at the same time. The non-oriented magnetic steel sheet comprises from about 1.5 to about 8.0 weight % Si, from about 0.005 to about 2.50 weight % Mn, and not more than about 50 ppm each of C, S, N, O, and B, in which a crystal orientation parameter <&Ggr;> is 0.200 or less. In addition, the average crystal grain diameter is preferably from about 50 to about 500 &mgr;m, and an areal ratio of crystal grains on a surface of the steel sheet is preferably 20% and less, in which crystal plane orientations of the crystal grains are within 15° from the <111> axis. In addition, the non-oriented magnetic steel sheet preferably contains small amounts of elements such as Al, Sb, Ni, Sn, Cu, P, and Cr. The manufacturing method for the non-oriented magnetic steel is also described.Type: GrantFiled: August 29, 2000Date of Patent: August 20, 2002Assignee: Kawasaki Steel CorporationInventors: Yasuyuki Hayakawa, Mitsumasa Kurosawa, Masaki Kawano, Michiro Komatsubara, Yuka Komori, Kazuaki Tamura
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Patent number: 5658668Abstract: An electromagnetic steel sheet having a corrosion-resistant electrically insulating film. The insulating film is formed by spraying and baking, on the steel sheet, a treating liquid containing an emulsion of fine resin particles, a reducing agent and an accelerator. The emulsion of fine resin particles exhibits a weight change peak temperature of not lower than about 400.degree. C. as measured by differential thermal weight measurement conducted while raising the emulsion temperature at a constant rate of temperature rise. The emulsion also substantially resists when contacted by phosphoric acid. The reducing agent is a phosphate ion aqueous solution containing a metal. Also disclosed is a corrosion-resistant core made from the electromagnetic steel sheet.Type: GrantFiled: March 28, 1995Date of Patent: August 19, 1997Assignee: Kawasaki Steel CorporationInventors: Hideo Kobayashi, Norio Kosuge, Yuka Komori
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Patent number: 5624749Abstract: An electromagnetic steel sheet has an electrically insulating coating with superior weldability, formed by coating a treatment solution on the electromagnetic steel sheet and baking the same, the treatment solution containing a synthetic resin fine-particle emulsion having resistance against chromic and/or bichromic acid and exhibiting a peak temperature not lower than 400.degree. C. at which a weight change rate is maximized when a sample is heated at a constant rate in differential thermal gravimetry, a chromate and/or bichromate base aqueous solution containing at least one kind of two-valence metal, and an organic reducer. The steel sheet is superior in electrical insulation, adhesion, punching ability, weldability and corrosion resistance.Type: GrantFiled: August 2, 1994Date of Patent: April 29, 1997Assignee: Kawasaki Steel CorporationInventors: Hideo Kobayashi, Norio Kosuge, Yasuo Yokoyama, Yuka Komori, Taizo Mohri