Patents by Inventor Katsuhiro Fuchigami

Katsuhiro Fuchigami 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).

  • Publication number: 20210010119
    Abstract: Ferritic stainless steel securing corrosion resistance while being excellent in ridging resistance able to be stably provided, that is, ferritic stainless steel with excellent ridging resistance having a composition comprising, by mass %, C: 0.001 to 0.01%, Si: 0.3% or less, Mn: 0.3% or less, P: 0.04% or less, S: 0.01% or less, Cr: 10 to 21%, Al: 0.01 to 0.2%, Ti: 0.015 to 0.3%, 0: 0.0005 to 0.0050%, N: 0.001 to 0.02%, Ca: 0.0015% or less, and Mg: 0.0003% to 0.
    Type: Application
    Filed: March 29, 2019
    Publication date: January 14, 2021
    Applicant: NIPPON STEEL STAINLESS STEEL CORPORATION
    Inventors: Shigeru KANEKO, Katsuhiro FUCHIGAMI, Yoshiharu INOUE
  • Patent number: 9127327
    Abstract: An environmentally friendly flux for molten steel desulfurization includes CaO and Al2O3 so that [CaO]/[Al2O3] is within a range of 1.6 to 3.0, and includes one or more alkali metal oxides of Na2O, K2O, and Li2O, and SiO2 so that [SiO2]/[R2O] is within a range of 0.1 to 3, [R2O] is within a range of 0.5 mass % to 5 mass %, and [SiO2] is within a range of 0.05 mass % to 15 mass % in a case in which the [CaO], the [Al2O3], the [SiO2], and the [R2O] represent the mass % of CaO, the mass % of Al2O3, the mass % of SiO2, and the total amount of the mass % of Na2O, the mass % of K2O, and the mass % of Li2O respectively.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 8, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masamitsu Wakoh, Akihiro Matsuzawa, Katsuhiro Fuchigami, Kohsuke Kume, Yuji Ogawa
  • Publication number: 20130333518
    Abstract: An environmentally friendly flux for molten steel desulfurization includes CaO and Al2O3 so that [CaO]/[Al2O3] is within a range of 1.6 to 3.0, and includes one or more alkali metal oxides of Na2O, K2O, and Li2O, and SiO2 so that [SiO2]/[R2O] is within a range of 0.1 to 3, [R2O] is within a range of 0.5 mass % to 5 mass %, and [SiO2] is within a range of 0.05 mass % to 15 mass % in a case in which the [CaO], the [Al2O3], the [SiO2], and the [R2O] represent the mass % of CaO, the mass % of Al2O3, the mass % of SiO2, and the total amount of the mass % of Na2O, the mass % of K2O, and the mass % of Li2O respectively.
    Type: Application
    Filed: March 30, 2012
    Publication date: December 19, 2013
    Inventors: Masamitsu Wakoh, Akihiro Matsuzawa, Katsuhiro Fuchigami, Kohsuke Kume, Yuji Ogawa
  • Patent number: 6555063
    Abstract: In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and directly analyzing a curved and non-smooth sample surface after solidification by a fluorescent X-ray analysis method using an energy dispersion type spectroscope, or by other chemical or physical measurements, to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: April 29, 2003
    Assignee: Nippon Steel Corporation
    Inventors: Kazushige Umezawa, Tokio Suzuki, Koichi Chiba, Ryuji Uemori, Takehiko Toh, Hiroyuki Kondo, Katsuhiro Fuchigami, Eiichi Takeuchi, Masamitsu Wakoh, Akihiro Ono
  • Patent number: 6432718
    Abstract: In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and directly analyzing a curved and non-smooth sample surface after solidification by dissolving the surface and extracting and filtering the inclusions to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: August 13, 2002
    Assignee: Nippon Steel Corporation
    Inventors: Kazushige Umezawa, Tokio Suzuki, Koichi Chiba, Ryuji Uemori, Takehiko Toh, Hiroyuki Kondo, Katsuhiro Fuchigami, Eiichi Takeuchi, Masamitsu Wakoh, Akihiro Ono
  • Patent number: 5985674
    Abstract: In order to quickly and economically evaluate cleanliness of a metal with high representativity when quantities, compositions, etc., of non-metallic inclusion particles existing in a metal and resulting in product defects are evaluated by a sample collected during the production process of the metal, the present invention provides an evaluation method involving the steps of levitation-melting a metal piece for a predetermined time by cold crucible levitation-melting means, discharging non-metallic inclusion particles contained in the metal piece to the surface of a molten metal, and directly analyzing a curved and non-smooth sample surface after solidification by a fluorescent X-ray analysis method using an energy dispersion type spectroscope, or by other chemical or physical measurements, to measure or analyze the quantities of elements constituting the non-metallic inclusion particles and to determine quantity of the non-metallic inclusions.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: November 16, 1999
    Assignee: Nippon Steel Corporation
    Inventors: Kazushige Umezawa, Tokio Suzuki, Koichi Chiba, Ryuji Uemori, Takehiko Toh, Hiroyuki Kondo, Katsuhiro Fuchigami, Eiichi Takeuchi, Masamitsu Wakoh, Akihiro Ono