Patents by Inventor Shoji Kinomura

Shoji Kinomura 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).

  • Patent number: 10550451
    Abstract: An object of the present invention is to provide an Ni-based alloy pipe or tube for nuclear power with reduced rate of SCC crack propagation. The Ni-based alloy pipe or tube for nuclear power according to the present invention is an Ni-based alloy pipe or tube having a wall thickness of 15 to 55 mm, having a chemical composition of, in mass %: 0.010 to 0.025% C; 0.10 to 0.50% Si; 0.01 to 0.50% Mn; up to 0.030% P; up to 0.002% S; 52.5 to 65.0% Ni; 20.0 to 35.0% Cr; 0.03 to 0.30% Mo; up to 0.018% Co; up to 0.015% Sn; 0.005 to 0.050% N; 0 to 0.300% Ti; 0 to 0.200% Nb; 0 to 0.300% Ta; 0% or more and less than 0.03% Zr; and the balance being Fe and impurities, wherein the Ni-based alloy pipe or tube has a microstructure being an austenite single phase, and the chemical composition satisfies the following equation, Eq. (1): ?0.0020?[N]/14?{[Ti]/47.9+[Nb]/92.9+[Ta]/180.9+[Zr]/91.2}?0.0015??Eq. (1). For the element symbols in Eq. (1), the contents of the corresponding elements in mass % are substituted.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: February 4, 2020
    Assignee: Nippon Steel Corporation
    Inventors: Kiyoko Takeda, Shoji Kinomura
  • Patent number: 10106871
    Abstract: A Ni-based alloy tube includes a base metal having a chemical composition consisting, by mass percent, of C: 0.15% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 40.0%, Ni: 50.0 to 80.0%, Ti: 0.50% or less, Cu: 0.60% or less, Al: 0.20% or less, N: 0.20% or less, and the balance: Fe and impurities; and a low Cr content complex oxide film having a thickness of 25 nm or smaller at least on an inner surface of the base metal, wherein contents of Al, Ni, Si, Ti, and Cr in the film satisfy [at % Al/at % Cr?2.00], [at % Ni/at % Cr?1.40], and [(at % Si+at % Ti)/at % Cr?0.10].
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: October 23, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuhiro Masaki, Manabu Kanzaki, Kazuyuki Kitamura, Shoji Kinomura, Yumi Momozono, Osamu Miyahara
  • Publication number: 20180163285
    Abstract: An object of the present invention is to provide an Ni-based alloy pipe or tube for nuclear power with reduced rate of SCC crack propagation. The Ni-based alloy pipe or tube for nuclear power according to the present invention is an Ni-based alloy pipe or tube having a wall thickness of 15 to 55 mm, having a chemical composition of, in mass %: 0.010 to 0.025% C; 0.10 to 0.50% Si; 0.01 to 0.50% Mn; up to 0.030% P; up to 0.002% 5;52.5 to 65.0% Ni; 20.0 to 35.0% Cr; 0.03 to 0.30% Mo; up to 0.018% Co; up to 0.015% Sn; 0.005 to 0.050% N; 0 to 0.300% Ti; 0 to 0.200% Nb; 0 to 0.300% Ta; 0% or more and less than 0.03% Zr; and the balance being Fe and impurities, wherein the Ni-based alloy pipe or tube has a microstructure being an austenite single phase, and the chemical composition satisfies the following equation, Eq. (1): ?0.0020?[N]/14?{[Ti]/47.9+[Nb]/92.9+[Ta]/180.9+[Zr]/91.2}?0.0015 ??Eq. (1). For the element symbols in Eq. (1), the contents of the corresponding elements in mass % are substituted.
    Type: Application
    Filed: June 21, 2016
    Publication date: June 14, 2018
    Inventors: Kiyoko Takeda, Shoji Kinomura
  • Publication number: 20170298478
    Abstract: A Ni-based alloy tube includes a base metal having a chemical composition consisting, by mass percent, of C: 0.15% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 40.0%, Ni: 50.0 to 80.0%, Ti: 0.50% or less, Cu: 0.60% or less, Al: 0.20% or less, N: 0.20% or less, and the balance: Fe and impurities; and a low Cr content complex oxide film having a thickness of 25 nm or smaller at least on an inner surface of the base metal, wherein contents of Al, Ni, Si, Ti, and Cr in the film satisfy [at % Al/at % Cr?2.00], [at % Ni/at % Cr?1.40], and [(at % Si+at % Ti)/at % Cr?0.10].
    Type: Application
    Filed: September 29, 2015
    Publication date: October 19, 2017
    Inventors: Yasuhiro MASAKI, Manabu KANZAKI, Kazuyuki KITAMURA, Shoji KINOMURA, Yumi MOMOZONO, Osamu MIYAHARA
  • Patent number: 9255319
    Abstract: There is provided a Cr-containing austenitic alloy tube, wherein a chromium oxide film with a thickness of 0.05 to 1.5 ?m having the relationship defined by Formula (i) is formed on the inner surface of the tube, wherein the average concentration of C in the depth range of 5 to 10 ?m from the inner surface is lower than the concentration of C in a base metal; 0.4??1/?2?2.5??(i) wherein ?1 and ?2 are thicknesses (?m) of the chromium oxide film at both ends of tube, respectively.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: February 9, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuhiro Masaki, Masahito Tasaka, Manabu Kanzaki, Akihiro Uehira, Shoji Kinomura
  • Patent number: 8900384
    Abstract: In a method for heat treating a metal tube or pipe for a nuclear power plant, the tube or pipe being accommodated in a batch-type vacuum heat treatment furnace, when the tube or pipe is laid down on and is subjected to heat treatment on a plurality of metal cross beams arranged along a longitudinal direction of the tube or pipe, it is possible to suppress scratches to be formed on the outer surface of the tube or pipe and attributable to heat treatment, and to reduce the discoloration on the outer surface of the tube or pipe by holding the tube or pipe and the metal cross beams in indirect contact with each other by virtue of a heat resistant fabric having a thickness of 0.1 to 1.2 mm interposed in between.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: December 2, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Shoji Kinomura, Shinichi Takenaka
  • Patent number: 8858740
    Abstract: In a method for heat treating a metal tube or pipe for a nuclear power plant, the tube or pipe being accommodated in a batch-type vacuum heat treatment furnace, when the tube or pipe is laid down on and is subjected to heat treatment on a plurality of metal cross beams arranged along a longitudinal direction of the tube or pipe, it is possible to suppress scratches to be formed on the outer surface of the tube or pipe and attributable to heat treatment, and to reduce the discoloration on the outer surface of the tube or pipe by holding the tube or pipe and the metal cross beams in indirect contact with each other by virtue of a heat resistant fabric having a thickness of 0.1 to 1.2 mm interposed in between.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: October 14, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Shoji Kinomura, Shinichi Takenaka
  • Publication number: 20130206272
    Abstract: There is provided a Cr-containing austenitic alloy tube, wherein a chromium oxide film with a thickness of 0.05 to 1.5 ?m having the relationship defined by Formula (i) is formed on the inner surface of the tube, wherein the average concentration of C in the depth range of 5 to 10 ?m from the inner surface is lower than the concentration of C in a base metal; 0.4??1/?2?2.5??(i) wherein ?1 and ?2 are thicknesses (?m) of the chromium oxide film at both ends of tube, respectively.
    Type: Application
    Filed: August 12, 2011
    Publication date: August 15, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuhiro Masaki, Masahito Tasaka, Manabu Kanzaki, Akihiro Uehira, Shoji Kinomura
  • Publication number: 20120285577
    Abstract: In a method for heat treating a metal tube or pipe for a nuclear power plant, the tube or pipe being accommodated in a batch-type vacuum heat treatment furnace, when the tube or pipe is laid down on and is subjected to heat treatment on a plurality of metal cross beams arranged along a longitudinal direction of the tube or pipe, it is possible to suppress scratches to be formed on the outer surface of the tube or pipe and attributable to heat treatment, and to reduce the discoloration on the outer surface of the tube or pipe by holding the tube or pipe and the metal cross beams in indirect contact with each other by virtue of a heat resistant fabric having a thickness of 0.1 to 1.2 mm interposed in between.
    Type: Application
    Filed: July 23, 2012
    Publication date: November 15, 2012
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Shoji KINOMURA, Shinichi TAKENAKA
  • Patent number: 8241439
    Abstract: A Ni—Cr alloy tube demonstrating an excellent corrosion resistance in a high temperature water environment can be provided, wherein the difference between uniform lattice strains of the surface layer thereof satisfies the following formulas (1) and (2). S?0.002??(1) S=D500?D?200??(2) wherein the meanings of the individual symbols in the above described formulas are as follows: S: The difference between uniform lattice strains (?) of the surface layer D500: The {111} interplanar spacing (?) at a depth of 500 nm from the material surface D?200: The average value of the {111} interplanar spacings (?) at the depth of 200 nm or less from the material surface.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: August 14, 2012
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Manabu Kanzaki, Mitsuharu Yonemura, Masanari Kimoto, Shoji Kinomura, Toshihiro Imoto
  • Patent number: 8027796
    Abstract: A method in accordance with the present invention includes the steps of: separating an eddy current signal into an X-axis component and a Y-axis component to obtain signal waveform data of the respective components; excluding predetermined low-frequency components respectively from the respective signal waveform data thus obtained; calculating a noise voltage value V1 defined by the following Equation (1) based upon voltage values X(i) and Y(i) of the signal waveform data of the X-axis component and the Y-axis component from which the low-frequency components have been excluded; and calculating an S/N ratio by dividing a voltage value D of an eddy current signal corresponding to a predetermined artificial flaw by the noise voltage value V1: V ? ? 1 = ? / n · ? i = 1 n ? ( X ? ( i ) 2 + Y ? ( i ) 2 ) 1 / 2 ( 1 ) where n represents the number of samplings of the signal waveform data.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: September 27, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Shoji Kinomura, Yoshiyuki Nakao, Toshiya Kodai, Shugo Nishiyama
  • Publication number: 20110056590
    Abstract: A Ni—Cr alloy tube demonstrating an excellent corrosion resistance in a high temperature water environment can be provided, wherein the difference between uniform lattice strains of the surface layer thereof satisfies the following formulas (1) and (2). S?0.
    Type: Application
    Filed: November 15, 2010
    Publication date: March 10, 2011
    Applicant: Sumitomo Metal Industries, Ltd.
    Inventors: Manabu KANZAKI, Mitsuharu Yonemura, Masanari Kimoto, Shoji Kinomura, Toshihiro Imoto
  • Publication number: 20100032061
    Abstract: A method for manufacturing a Ni-based alloy article which elutes little Ni even when used in a high-temperature water environment for a long period comprises heating the Ni-based alloy in a carbon dioxide-containing atmosphere for a set period of time at an elevated temperature to form an oxide film comprising chromium oxide on a surface thereof. Using carbon dioxide as an oxidizing gas produces an oxide film of generally uniform thickness along a length of the article being treated so that resistance to nickel elution is more uniform over the entire article.
    Type: Application
    Filed: August 10, 2009
    Publication date: February 11, 2010
    Inventors: Hiroyuki Anada, Shoji Kinomura, Noriaki Hirohata, Manabu Kanzaki, Kazuyuki Kitamura
  • Publication number: 20090138222
    Abstract: A method in accordance with the present invention includes the steps of: separating an eddy current signal into an X-axis component and a Y-axis component to obtain signal waveform data of the respective components; excluding predetermined low-frequency components respectively from the respective signal waveform data thus obtained; calculating a noise voltage value V1 defined by the following Equation (1) based upon voltage values X(i) and Y(i) of the signal waveform data of the X-axis component and the Y-axis component from which the low-frequency components have been excluded; and calculating an S/N ratio by dividing a voltage value D of an eddy current signal corresponding to a predetermined artificial flaw by the noise voltage value V1: V ? ? 1 = ? / n · ? i = 1 n ? ( X ? ( i ) 2 + Y ? ( i ) 2 ) 1 / 2 ( 1 ) where n represents the number of samplings of the signal waveform data.
    Type: Application
    Filed: October 27, 2006
    Publication date: May 28, 2009
    Inventors: Shoji Kinomura, Yoshiyuki Nakao, Toshiya Kodai, Shugo Nishiyama
  • Publication number: 20060177679
    Abstract: A method for manufacturing a Ni-based alloy article which elutes little Ni even when used in a high-temperature water environment for a long period comprises heating the Ni-based alloy in a carbon dioxide-containing atmosphere for a set period of time at an elevated temperature to form an oxide film comprising chromium oxide on a surface thereof. Using carbon dioxide as an oxidizing gas produces an oxide film of generally uniform thickness along a length of the article being treated so that resistance to nickel elution is more uniform over the entire article.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 10, 2006
    Inventors: Hiroyuki Anada, Shoji Kinomura, Noriaki Hirohata, Manabu Kanzakli, Kazuyuki Kitamura