Patents by Inventor Nobuhiko Hiraide

Nobuhiko Hiraide 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: 20210140569
    Abstract: This ferritic stainless steel pipe contains, by mass %: C: 0.001% to 0.100%; Si: 0.01% to 2.00%; Mn: 0.01% to 2.00%; P: 0.001% to 0.05%; S: 0.0001% to 0.005%; Cr: 10.5% to 20.0%; Sn: 0.001% to 0.600%; Ti: 0.001% to 1.000%; Al: 0.001% to 0.100%; and N: 0.001% to 0.02%, with a balance being Fe and unavoidable impurities, the ferritic stainless steel pipe includes a pipe-end-thickened portion at a pipe end portion, and a gap distance d (?un) formed at the pipe end portion satisfies a relationship of d?Cr2/(1000 Sn) (in the expression, Cr and Sn represent amounts (mass %) of respective elements).
    Type: Application
    Filed: March 27, 2018
    Publication date: May 13, 2021
    Applicant: NIPPON STEEL Stainless Steel Corporation
    Inventors: Masatoshi ABE, Junichi HAMADA, Nobuhiko HIRAIDE
  • Publication number: 20210040590
    Abstract: This ferritic stainless steel includes: in terms of % by mass, C: 0.001% to 0.100%; Si: 0.01% to 5.00%; Mn: 0.01% to 2.00%; P: 0.050% or less; S: 0.0100% or less; Cr: 9.0% to 25.0%; Ti: 0.001% to 1.00%; Al: 0.001% to 5.000%; and N: 0.001% to 0.050%, with a balance being Fe and impurities, wherein in a region from a steel surface to a depth of 5 nm, and not exceeding a thickness of a passive film, a total amount of Al and Si is 1.0 atomic % or more, an amount of Cr is 10.0 atomic % or more, and an amount of Fe is 85.0 atomic % or less, in terms of cation fraction.
    Type: Application
    Filed: March 19, 2019
    Publication date: February 11, 2021
    Applicant: NIPPON STEEL Stainless Steel Corporation
    Inventors: Masatoshi ABE, Junichi HAMADA, Nobuhiko HIRAIDE, Atsutaka HAYASHI
  • Patent number: 10793930
    Abstract: A steel material contains, in mass %, C: 0.005 to 0.050, N: 0.05 to 0.30, Si: 0.1 to 1.5, Mn: 0.1 to 7.0, P: 0.005 to 0.100, S: 0.0001 to 0.0200, Cr: 18.0 to 28.0, Cu: 0.1 to 3.0, Ni: 0.1 to 8.0, Mo: 0.1 to 5.0, Al: 0.001 to 0.050, B: 0.0001 to 0.0200, and Ca: 0.0001 to 0.0100. An area ratio of an austenitic phase ranges from 30% to 70% and formulae (I) and (II) below are satisfied. 1.03?[% Cr*F]/[% Cr]?1.40??Formula (I) 1.05?[% Mn*A]/[% Mn]?1.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: October 6, 2020
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Atsutaka Hayashi, Nobuhiko Hiraide, Junichi Hamada
  • Patent number: 10752973
    Abstract: This ferritic stainless steel contains, by mass %, C: 0.001% to 0.030%; Si: 0.01% to 1.00%. Mn: 0.01% to 2.00%, P: 0.050% or less, S: 0.0100% or less, Cr: 11.0% to 30.0%, Mo: 0.01% to 3.00%, Ti: 0.001% to 0.050%, Al: 0.001% to 0.030%, Nb: 0.010% to 1.000%, and N: 0.050% or less, with a remainder being Fe and inevitable impurities, wherein an amount of Al, an amount of Ti, and an amount of Si (mass %) satisfy Al/Ti?8.4Si-0.78.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: August 25, 2020
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Masatoshi Abe, Junichi Hamada, Nobuhiko Hiraide, Norihiro Kanno, Shigeo Fukumoto, Shigeru Kaneko, Atsutaka Hayashi
  • Patent number: 10669606
    Abstract: A stainless steel exhibiting an excellent brazeability includes in mass %: C: from 0.001% to 0.1%; Si: from more than 1.5% to 4.0%; Mn: from 0.05% to 4.0%; Cr: from 10.5% to 30%; Ni: 35% or less; N: from 0.001% to 0.4%; one or both of Ti: 0.002% to 0.030% and Al: 0.002% to 0.10%; and a balance being Fe and inevitable impurities, in which an Si content, a Ti content and an Al content satisfy Formula 1, and an oxide film with a composition satisfying Formula 2 is formed on a surface of the stainless steel, Sim/(Tim+Alm)?40??Formula 1 1.2×SimFem?Sif/Fef?5×Sim/Fem??Formula 2 in Formula 1 and Formula 2, a suffix “f” expresses the oxide film in a unit of atom %, and a suffix “m” expresses a base material in a unit of mass %.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: June 2, 2020
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Nobuhiko Hiraide, Atsutaka Hayashi
  • Publication number: 20190300980
    Abstract: A steel material contains, in mass %, C: 0.005 to 0.050, N: 0.05 to 0.30, Si: 0.1 to 1.5, Mn: 0.1 to 7.0, P: 0.005 to 0.100, S: 0.0001 to 0.0200, Cr: 18.0 to 28.0, Cu: 0.1 to 3.0, Ni: 0.1 to 8.0, Mo: 0.1 to 5.0, Al: 0.001 to 0.050, B: 0.0001 to 0.0200, and Ca: 0.0001 to 0.0100. An area ratio of an austenitic phase ranges from 30% to 70% and formulae (I) and (II) below are satisfied. 1.03?[% Cr*F]/[% Cr]?1.40??Formula (I) 1.05?[% Mn*A]/[% Mn]?1.
    Type: Application
    Filed: February 14, 2017
    Publication date: October 3, 2019
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Atsutaka HAYASHI, Nobuhiko HIRAIDE, Junichi HAMADA
  • Publication number: 20190226047
    Abstract: This ferritic stainless steel contains, by mass %, C: 0.001% to 0.030%; Si: 0.01% to 1.00%. Mn: 0.01% to 2.00%, P: 0.050% or less, S: 0.0100% or less, Cr: 11.0% to 30.0%, Mo: 0.01% to 3.00%, Ti: 0.001% to 0.050%, Al: 0.001% to 0.030%, Nb: 0.010% to 1.000%, and N: 0.050% or less, with a remainder being Fe and inevitable impurities, wherein an amount of Al, an amount of Ti, and an amount of Si (mass %) satisfy Al/Ti?8.4Si-0.78.
    Type: Application
    Filed: March 28, 2019
    Publication date: July 25, 2019
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Masatoshi ABE, Junichi HAMADA, Nobuhiko HIRAIDE, Norihiro KANNO, Shigeo FUKUMOTO, Shigeru KANEKO, Atsutaka HAYASHI
  • Patent number: 10131977
    Abstract: One aspect of this ferritic stainless steel sheet contains, by mass %, C: 0.03% or less, N: 0.05% or less, Si: 1% or less, Mn: 1.2% or less, Cr: 14% or more and 28% or less, Nb: 8(C +N) or more and 0.8% or less, and Al: 0.1% or less, with a balance being Fe and inevitable impurities, in which a film satisfying Expression 1 is formed in a surface thereof. Expression 1 is df×Crf+5(Sif+3Alf)?2.0. In Expression 1, df represents a thickness (nm) of the film, Crf represents a Cr cationic fraction in the film, Sif represents a Si cationic fraction in the film, and Alf represents an Al cationic fraction in the film.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: November 20, 2018
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Nobuhiko Hiraide, Tooru Matsuhashi, Noriyo Morihiro, Naoto Ono
  • Patent number: 10030282
    Abstract: This ferritic stainless steel sheet contains, by mass %: C: 0.02% or less, N: 0.02% or less, Si: 0.05% to 0.80%, Mn: 0.05% to 1.00%, P: 0.04% or less, S: 0.01% or less, Cr: 12% to 20%, Cu: 0.80% to 1.50%; Ni: 1.0% or less, Mo: 0.01% to 2.00%, Nb: 0.30% to 1.00%, Ti: 0.01% to less than 0.25%, Al: 0.003% to 0.46%, V: 0.01% to less than 0.15%, and B: 0.0002% to 0.0050%, with a remainder of Fe and inevitable impurities, wherein the following formulae (1) and (2) are satisfied, and an average Cu concentration in an area from a surface to a depth of 200 nm is 3.00% or less, in the case of Mn<0.65%, 1.44×Si?Mn?0.05?0??(1), and in the case of Mn?0.65%, 1.10×Si+Mn?1.19?0??(2).
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: July 24, 2018
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Atsutaka Hayashi, Yoshiharu Inoue, Nobuhiko Hiraide
  • Patent number: 9945016
    Abstract: This heat-resistant austenitic stainless steel sheet contains, in mass %, C: 0.05 to 0.15%, Si: 1.0 to 3.5%, Mn: 0.5 to 2.0%, P: not more than 0.04%, S: not more than 0.01%, Cr: 23.0 to 26.0%, Ni: 10.0 to 15.0%, Mo: 0.50 to 1.20%, Ti: not more than 0.1%, Al: 0.01 to 0.10% and N: 0.10 to 0.30%, wherein the total amount of C and N (C+N) is from 0.25 to 0.35%, and the balance is composed of Fe and unavoidable impurities. The heat-resistant austenitic stainless steel can be used in a high-temperature environment that reaches a maximum temperature of 1,100° C.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: April 17, 2018
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Yoshiharu Inoue, Nobuhiko Hiraide, Atsuhisa Yakawa
  • Publication number: 20180037968
    Abstract: A stainless steel exhibiting an excellent brazeability includes in mass %: C: from 0.001% to 0.1%; Si: from more than 1.5% to 4.0%; Mn: from 0.05% to 4.0%; Cr: from 10.5% to 30%; Ni: 35% or less; N: from 0.001% to 0.4%; one or both of Ti: 0.002% to 0.030% and Al: 0.002% to 0.10%; and a balance being Fe and inevitable impurities, in which an Si content, a Ti content and an Al content satisfy Formula 1, and an oxide film with a composition satisfying Formula 2 is formed on a surface of the stainless steel, Sim/(Tim+Alm)?40??Formula 1 1.2×SimFem?Sif/Fef?5×Sim/Fem??Formula 2 in Formula 1 and Formula 2, a suffix “f” expresses the oxide film in a unit of atom %, and a suffix “m” expresses a base material in a unit of mass %.
    Type: Application
    Filed: March 22, 2016
    Publication date: February 8, 2018
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Nobuhiko HIRAIDE, Atsutaka HAYASHI
  • Publication number: 20180016655
    Abstract: A ferritic stainless steel for exhaust system components excellent in corrosion resistance after heating includes: 0.015 mass % or less of C; 0.02 mass % or less of N; 0.03 mass % to 1.0 mass of Si; 1.0 mass of Mn; 0.04 mass of P; 0.01 mass of S; 10.5 mass % to 22.5 mass of Cr; 0.02 mass % to 0.5 mass of Sn; 0.003 mass % to 0.2 mass of Al; one or both of 0.03 mass % to 0.35 mass of Ti and 0.03 mass % to 0.6 mass of Nb; and a remnant comprising Fe and inevitable impurities, wherein a grain size number on a surface of the ferritic stainless steel is 6 to 2 to 15 nm of a layer containing Sn at a concentration twice or more of Sn content in the base material is formed on the ferritic stainless steel.
    Type: Application
    Filed: January 15, 2016
    Publication date: January 18, 2018
    Applicant: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Nobuhiko HIRAIDE, Hiroshi URASHIMA
  • Publication number: 20170275723
    Abstract: This ferritic stainless steel contains, by mass %, C: 0.001% to 0.030%; Si: 0.01% to 1.00%, Mn: 0.01% to 2.00%, P: 0.050% or less, S: 0.0100% or less, Cr: 11.0% to 30.0%, Mo: 0.01% to 3.00%, Ti: 0.001% to 0.050%, Al: 0.001% to 0.030%, Nb: 0.010% to 1.000%, and N: 0.050% or less, with a remainder being Fe and inevitable impurities, wherein an amount of Al, an amount of Ti, and an amount of Si (mass %) satisfy Al/Ti?8.4Si?0.78.
    Type: Application
    Filed: October 30, 2015
    Publication date: September 28, 2017
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Masatoshi ABE, Junichi HAMADA, Nobuhiko HIRAIDE, Norihiro KANNO, Shigeo FUKUMOTO, Shigeru KANEKO, Atsutaka HAYASHI
  • Patent number: 9611525
    Abstract: An aspect of a ferritic stainless steel contains, by mass %: C: 0.03% or less; N: 0.03% or less; Si: more than 0.1% to 1% or less; Mn: 0.02% to 1.2%; Cr: 15% to 23%; Al: 0.002% to 0.5%; and either one or both of Nb and Ti, with the remainder being Fe and unavoidable impurities, wherein Expression (1) and Expression (2) illustrated below are satisfied, an oxide film is formed on a surface thereof, and the oxide film contains Cr, Si, Nb, Ti and Al in a total cationic fraction of 30% or more, 8(C+N)+0.03?Nb+Ti?0.6??(1) Si+Cr+Al+{Nb+Ti?8(C+N)}?15.5??(2).
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: April 4, 2017
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Nobuhiko Hiraide, Fumio Fudanoki, Shunji Sakamoto
  • Publication number: 20160032434
    Abstract: This heat-resistant austenitic stainless steel sheet contains, in mass %, C: 0.05 to 0.15%, Si: 1.0 to 3.5%, Mn: 0.5 to 2.0%, P: not more than 0.04%, S: not more than 0.01%, Cr: 23.0 to 26.0%, Ni: 10.0 to 15.0%, Mo: 0.50 to 1.20%, Ti: not more than 0.1%, Al: 0.01 to 0.10% and N: 0.10 to 0.30%, wherein the total amount of C and N (C+N) is from 0.25 to 0.35%, and the balance is composed of Fe and unavoidable impurities. The heat-resistant austenitic stainless steel can be used in a high-temperature environment that reaches a maximum temperature of 1,100° C.
    Type: Application
    Filed: March 28, 2014
    Publication date: February 4, 2016
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Yoshiharu INOUE, Nobuhiko HIRAIDE, Atsuhisa YAKAWA
  • Patent number: 9238855
    Abstract: This ferritic stainless steel for components of an automobile exhaust system includes, in terms of percent by mass: C: ?0.015%; Si: 0.01% to 0.50%; Mn: 0.01% to 0.50%; P: ?0.050%; S: ?0.010%; N: ?0.015%; Al: 0.010% to 0.100%; Cr: 16.5% to 22.5%; Ni: 0.5% to 2.0%; and Sn: 0.01% to 0.50%, and further includes either one or both of Ti: 0.03% to 0.30% and Nb: 0.03% to 0.30%, with a remainder being Fe and inevitable impurities.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: January 19, 2016
    Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Shunji Sakamoto, Shinichi Teraoka, Nobuhiko Hiraide
  • Publication number: 20160002760
    Abstract: One aspect of this ferritic stainless steel sheet contains, by mass %, C: 0.03% or less, N: 0.05% or less, Si: 1% or less, Mn: 1.2% or less, Cr: 14% or more and 28% or less, Nb: 8(C+N) or more and 0.8% or less, and Al: 0.1% or less, with a balance being Fe and inevitable impurities, in which a film satisfying Expression 1 is formed in a surface thereof. df×Crf+5(Sif+3Alf)?2.0??(Expression 1) In Expression 1, df represents a thickness (nm) of the film, Crf represents a Cr cationic fraction in the film, Sif represents a Si cationic fraction in the film, and Alf represents an Al cationic fraction in the film.
    Type: Application
    Filed: March 24, 2014
    Publication date: January 7, 2016
    Applicant: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Nobuhiko HIRAIDE, Tooru MATSUHASHI, Noriyo MORIHIRO, Naoto ONO
  • Publication number: 20140373980
    Abstract: This ferritic stainless steel sheet contains, by mass %: C: 0.02% or less, N: 0.02% or less, Si: 0.05% to 0.80%, Mn: 0.05% to 1.00%, P: 0.04% or less, S: 0.01% or less, Cr: 12% to 20%, Cu: 0.80% to 1.50%; Ni: 1.0% or less, Mo: 0.01% to 2.00%, Nb: 0.30% to 1.00%, Ti: 0.01% to less than 0.25%, Al: 0.003% to 0.46%, V: 0.01% to less than 0.15%, and B: 0.0002% to 0.0050%, with a remainder of Fe and inevitable impurities, wherein the following formulae (1) and (2) are satisfied, and an average Cu concentration in an area from a surface to a depth of 200 nm is 3.00% or less, in the case of Mn<0.65%, 1.44×Si—Mn?0.05?0??(1), and in the case of Mn?0.65%, 1.10×Si+Mn?1.19?0??(2).
    Type: Application
    Filed: February 15, 2013
    Publication date: December 25, 2014
    Inventors: Atsutaka Hayashi, Yoshiharu Inoue, Nobuhiko Hiraide
  • Publication number: 20140069619
    Abstract: An aspect of a ferritic stainless steel contains, by mass %: C: 0.03% or less; N: 0.03% or less; Si: more than 0.1% to 1% or less; Mn: 0.02% to 1.2%; Cr: 15% to 23%; Al: 0.002% to 0.5%; and either one or both of Nb and Ti, with the remainder being Fe and unavoidable impurities, wherein Expression (1) and Expression (2) illustrated below are satisfied, an oxide film is formed on a surface thereof, and the oxide film contains Cr, Si, Nb, Ti and Al in a total cationic fraction of 30% or more, 8(C+N)+0.03?Nb+Ti?0.6??(1) Si+Cr+Al+{Nb+Ti?8(C+N)}?15.5??(2).
    Type: Application
    Filed: March 28, 2012
    Publication date: March 13, 2014
    Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
    Inventors: Nobuhiko Hiraide, Fumio Fudanoki, Shunji Sakamoto
  • Patent number: 8470237
    Abstract: The stainless steel of the first embodiment includes C: 0.001 to 0.02%, N: 0.001 to 0.02%, Si: 0.01 to 0.5%, Mn: 0.05 to 0.5%, P: 0.04% or less, S: 0.01% or less, Ni: more than 3% to 5%, Cr: 11 to 26%, and either one or both of Ti: 0.01 to 0.5% and Nb: 0.02 to 0.6%, and contains as the remainder, Fe and unavoidable impurities. The stainless steel of the second embodiment has an alloy composition different from those of the first and third embodiments and satisfies the formula (A): Cr+3Mo+6Ni?23 and formula (B): Al/Nb?10 and contains as the remainder, Fe and unavoidable impurities. The stainless steel of the third embodiment has an alloy composition different from those of the first and second embodiments and includes either one or both of Sn: 0.005 to 2% and Sb: 0.005 to 1% and contains as the remainder, Fe and unavoidable impurities.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: June 25, 2013
    Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
    Inventors: Nobuhiko Hiraide, Haruhiko Kajimura, Ken Kimura