Patents by Inventor Kazumichi Sashi
Kazumichi Sashi 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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Publication number: 20220028576Abstract: An electrical steel sheet provided with an insulating coating wherein the insulating coating is formed by a method includes forming an insulating coating on an electrical steel sheet, including: preparing a treatment solution that does not contain an Fe compound by adding an Si compound to water; applying the treatment solution to a surface of the electrical steel sheet; leaving the treatment solution on the surface of the electrical steel sheet to allow Fe in the electrical steel sheet to be dissolved in the treatment solution; and baking the treatment solution to form the insulating film such that a coating weight of Si in the insulating coating in terms of SiO2 is 50% to 99% of the total coating weight, and a ratio (Fe/Si) of content of Fe to content of Si in the insulating coating is 0.01 to 0.6 on a molar basis.Type: ApplicationFiled: October 5, 2021Publication date: January 27, 2022Inventors: Kazumichi Sashi, Nobuko Nakagawa, Naoki Muramatsu, Chiyoko Tada, Nobue Fujibayashi
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Patent number: 11177052Abstract: A method for forming an insulating coating on an electrical steel sheet is provided. The method includes preparing a treatment solution by adding a Si compound to water and applying the treatment solution to a surface of the electrical steel sheet. Fe in the electrical steel sheet dissolves in the treatment solution and, thereafter, the electrical steel sheet and treatment solution are baked to form the insulating film. In the insulating film, a coating weight of Si in terms of SiO2 is 50% to 99% of the total coating weight, and a ratio (Fe/Si) of content of Fe to content of Si in the insulating coating is 0.01 to 0.6 on a molar basis.Type: GrantFiled: July 22, 2019Date of Patent: November 16, 2021Assignee: JFE Steel CorporationInventors: Kazumichi Sashi, Nobuko Nakagawa, Naoki Muramatsu, Chiyoko Tada, Nobue Fujibayashi
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Patent number: 10526672Abstract: The disclosure provides an electrical steel sheet with an insulating coating excellent in both punchability and powdering resistance, without any chromium compound being contained in the insulating coating. The electrical steel sheet with an insulating coating includes an electrical steel sheet and an insulating coating formed on the electrical steel sheet. The insulating coating contains Si and particulate organic resin. The organic resin contains primary particles having an average primary particle size of 1.0 ?m or less, and 5% or more and 50% or less of the primary particles of the organic resin are agglomerated particles.Type: GrantFiled: April 5, 2016Date of Patent: January 7, 2020Assignee: JFE STEEL CORPORATIONInventors: Naoki Muramatsu, Nobuko Nakagawa, Kazumichi Sashi, Chiyoko Tada
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Publication number: 20190348195Abstract: A method for forming an insulating coating on an electrical steel sheet is provided. The method includes preparing a treatment solution by adding a Si compound to water and applying the treatment solution to a surface of the electrical steel sheet. Fe in the electrical steel sheet dissolves in the treatment solution and, thereafter, the electrical steel sheet and treatment solution are baked to form the insulating film. In the insulating film, a coating weight of Si in terms of SiO2 is 50% to 99% of the total coating weight, and a ratio (Fe/Si) of content of Fe to content of Si in the insulating coating is 0.01 to 0.6 on a molar basis.Type: ApplicationFiled: July 22, 2019Publication date: November 14, 2019Inventors: Kazumichi Sashi, Nobuko Nakagawa, Naoki Muramatsu, Chiyoko Tada, Nobue Fujibayashi
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Patent number: 10403417Abstract: An electrical steel sheet is provided with insulating coating. The insulating coating contains Si and Fe. The coating weight of Si in the insulating coating in terms of SiO2 is 50% to 99% of the total coating weight. The ratio (Fe/Si) of the content of Fe to the content of Si in the insulating coating is 0.01 to 0.6 on a molar basis. The ratio (C (the organic resin+the lubricant)/(Fe2O3+SiO2)) of the coating weight of the organic resin and/or the lubricant in terms of C to the sum of the coating weight of Fe in terms of Fe2O3 and the coating weight of Si in terms of SiO2 preferably is 0.05 to 0.8.Type: GrantFiled: November 11, 2014Date of Patent: September 3, 2019Assignee: JFE Steel CorporationInventors: Kazumichi Sashi, Nobuko Nakagawa, Naoki Muramatsu, Chiyoko Tada, Nobue Fujibayashi
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Publication number: 20180251869Abstract: The disclosure provides an electrical steel sheet with an insulating coating excellent in both punchability and powdering resistance, without any chromium compound being contained in the insulating coating. The electrical steel sheet with an insulating coating includes an electrical steel sheet and an insulating coating formed on the electrical steel sheet. The insulating coating contains Si and particulate organic resin. The organic resin contains primary particles having an average primary particle size of 1.0 ?m or less, and 5% or more and 50% or less of the primary particles of the organic resin are agglomerated particles.Type: ApplicationFiled: April 5, 2016Publication date: September 6, 2018Applicant: JFE STEEL CORPORATIONInventors: Naoki MURAMATSU, Nobuko NAKAGAWA, Kazumichi SASHI, Chiyoko TADA
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Publication number: 20170162295Abstract: An electrical steel sheet is provided with insulating coating. The insulating coating contains Si and Fe. The coating weight of Si in the insulating coating in terms of SiO2 is 50% to 99% of the total coating weight. The ratio (Fe/Si) of the content of Fe to the content of Si in the insulating coating is 0.01 to 0.6 on a molar basis. The ratio (C (the organic resin+the lubricant)/(Fe2O3+SiO2)) of the coating weight of the organic resin and/or the lubricant in terms of C to the sum of the coating weight of Fe in terms of Fe2O3 and the coating weight of Si in terms of SiO2 preferably is 0.05 to 0.8.Type: ApplicationFiled: November 11, 2014Publication date: June 8, 2017Inventors: Kazumichi Sashi, Nobuko Nakagawa, Naoki Muramatsu, Chiyoko Tada, Nobue Fujibayashi
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Publication number: 20170117758Abstract: A stacked electrical steel sheet used for a stacked iron core of an automotive motor and the like required to have high-temperature bond property and high-temperature oil resistance is provided. An electrical steel sheet for stacking includes: an electrical steel sheet; and a bond-type insulating coating formed on at least one surface of the electrical steel sheet and having Martens hardness HM of 50 or more and less than 500.Type: ApplicationFiled: July 24, 2015Publication date: April 27, 2017Applicant: JFE STEEL CORPORATIONInventors: Nobuko NAKAGAWA, Kazumichi SASHI, Naoki MURAMATSU, Chiyoko TADA
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Patent number: 9594191Abstract: A solar reflector plate maintains an excellent reflectance of a reflective layer and has excellent sand resistance and weather resistance. The solar reflector plate includes a substrate; a reflective layer provided onto the substrate; and a protective layer provided onto the reflective layer, wherein the protective layer contains silicon in an amount of 10% by mass to 60% by mass in terms of SiO2 and an organic substance, and has 1.5 to 3.2 oxygen atoms on average that form a chemical bond with silicon.Type: GrantFiled: March 19, 2013Date of Patent: March 14, 2017Assignee: JFE Steel CorporationInventors: Kazumichi Sashi, Takahiko Oshige, Shin Ishikawa, Yoshihito Sakamoto, Takahiro Kubota
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Patent number: 9534136Abstract: A semi-organic insulation coating includes an inorganic component and an organic resin, a Zr compound and an Si compound contains a plate-like silica as an inorganic component and are included in a ratio in a dry coating of 20 to 70 mass % of Zr compound (converted to ZrO2) and 10 to 50 mass % of Si compound containing plate-like silica (converted to SiO2), and the remainder is substantially an organic resin, whereby a magnetic steel sheet with a semi-organic insulation coating has no deterioration of corrosion resistance and water resistance without containing a chromium compound and being excellent in powdering resistance, scratch resistance, sticking resistance, TIG weldability, punchability and coating appearance.Type: GrantFiled: July 21, 2011Date of Patent: January 3, 2017Assignee: JFE Steel CorporationInventors: Kazumichi Sashi, Hiroyuki Ogata, Chiyoko Tada, Nobuko Nakagawa, Nobue Fujibayashi, Tomofumi Shigekuni, Kenichi Sasaki
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Publication number: 20160111182Abstract: There is provided an electrical steel sheet provided with an insulating coating which has high corrosion resistance and high adhesion. The electrical steel sheet provided with an insulating coating includes an electrical steel sheet and an insulating coating disposed on the electrical steel sheet. The insulating coating includes Zr and Fe. The content of Zr in the insulating coating is in the range of 0.05 to 1.50 g/m2 in terms of ZrO2. The compositional ratio between Zr and Fe is such that the molar ratio of Fe to Zr, that is, the ratio of the amount (moles) of Fe included in the insulating coating to the amount (moles) of Zr included in the insulating coating, is in the range of 0.10 to 2.00.Type: ApplicationFiled: May 13, 2014Publication date: April 21, 2016Applicant: JFE STEEL CORPORATIONInventors: Kazumichi SASHI, Naoki MURAMATSU, Nobue FUJIBAYASHI, Takahiro KUBOTA
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Patent number: 9234680Abstract: A solar light reflecting plate used for a light condensing and heat collecting device which includes a solar light reflecting plate that reflects and condenses solar light and a heat collecting tube that receives the solar light condensed by the solar light reflecting plate and is heated by the condensed solar light, wherein the solar light reflecting plate includes at least a rolled substrate, a surface roughness of a solar light reflecting surface that is an outermost surface and that reflects solar light is 0.02 ?m to 1.0 ?m in terms of arithmetic mean roughness Ra, and the solar light reflecting plate is disposed so that an angle between a rolling direction of the substrate and a longitudinal direction of the heat collecting tube is 80° to 100°.Type: GrantFiled: August 9, 2012Date of Patent: January 12, 2016Assignee: JFE Steel CorporationInventors: Kazumichi Sashi, Takahiko Oshige, Naoki Nishiyama, Yoshihito Sakamoto
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Publication number: 20150109696Abstract: A solar reflector plate maintains an excellent reflectance of a reflective layer and has excellent sand resistance and weather resistance. The solar reflector plate includes a substrate; a reflective layer provided onto the substrate; and a protective layer provided onto the reflective layer, wherein the protective layer contains silicon in an amount of 10% by mass to 60% by mass in terms of SiO2 and an organic substance, and has 1.5 to 3.2 oxygen atoms on average that form a chemical bond with silicon.Type: ApplicationFiled: March 19, 2013Publication date: April 23, 2015Inventors: Kazumichi Sashi, Takahiko Oshige, Shin Ishikawa, Yoshihito Sakamoto, Takahiro Kubota
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Publication number: 20140209091Abstract: A solar light reflecting plate used for a light condensing and heat collecting device which includes a solar light reflecting plate that reflects and condenses solar light and a heat collecting tube that receives the solar light condensed by the solar light reflecting plate and is heated by the condensed solar light, wherein the solar light reflecting plate includes at least a rolled substrate, a surface roughness of a solar light reflecting surface that is an outermost surface and that reflects solar light is 0.02 ?m to 1.0 ?m in terms of arithmetic mean roughness Ra, and the solar light reflecting plate is disposed so that an angle between a rolling direction of the substrate and a longitudinal direction of the heat collecting tube is 80° to 100°.Type: ApplicationFiled: August 9, 2012Publication date: July 31, 2014Applicant: JFE STEEL CORPORATIONInventors: Kazumichi Sashi, Takahiko Oshige, Naoki Nishiyama, Yoshihito Sakamoto
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Publication number: 20140186614Abstract: An electrical steel sheet with an insulation coating excellent in punchability, coating adhesion property and coating film property after annealing, even without containing any chromium compound in the insulation coating. The insulation coating is formed by applying a surface-treatment agent to at least one side of the electrical steel sheet and drying the surface-treatment agent. The surface-treatment agent contains trialkoxysilane and/or dialkoxysilane (A) in which a substituent bound to Si is constituted only by at least one non-reactive substituent selected from the group consisting of hydrogen, an alkyl group, and a phenyl group; and a silane coupling agent (B), at a mass ratio (A/B) of 0.05 to 1.0.Type: ApplicationFiled: August 29, 2012Publication date: July 3, 2014Applicant: JFE Steel CorporationInventors: Nobue Fujibayashi, Kazumichi Sashi, Yusuke Okumura, Yasuhide Oshima, Takahiro Kubota, Masayasu Nagoshi
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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: 20130115444Abstract: A semi-organic insulation coating includes an inorganic component and an organic resin, a Zr compound and an Si compound contains a plate-like silica as an inorganic component and are included in a ratio in a dry coating of 20 to 70 mass % of Zr compound (converted to ZrO2) and 10 to 50 mass % of Si compound containing plate-like silica (converted to SiO2), and the remainder is substantially an organic resin, whereby a magnetic steel sheet with a semi-organic insulation coating has no deterioration of corrosion resistance and water resistance without containing a chromium compound and being excellent in powdering resistance, scratch resistance, sticking resistance, TIG weldability, punchability and coating appearance.Type: ApplicationFiled: July 21, 2011Publication date: May 9, 2013Applicant: JFE STEEL CORPORATIONInventors: Kazumichi Sashi, Hiroyuki Ogata, Chiyoko Tada, Nobuko Nakagawa, Nobue Fujibayashi, Tomofumi Shigekuni, Kenichi Sasaki
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Publication number: 20120301744Abstract: An electrical steel sheet is provided with an insulating coating which has inorganic with some organic materials, the insulating coating including inorganic components and an organic resin, the insulating coating contains, as the inorganic components, a Zr compound, a B compound, and a Si compound, specifically, when expressed as percentages in the dry coating, 20% to 70% by mass of the Zr compound (in terms of ZrO2), 0.1% to 5% by mass of the B compound (in terms of B2O3), and 10% to 50% by mass of the Si compound (in terms of SiO2), and the balance containing the organic resin.Type: ApplicationFiled: November 5, 2010Publication date: November 29, 2012Applicant: JFE Steel CorporationInventors: Kazumichi Sashi, Hiroyuki Ogata, Chiyoko Tada, Nobuko Nakagawa, Nobue Fujibayashi, Tomofumi Shigekuni, Kenichi Sasaki
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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