Patents by Inventor Yuji Arai

Yuji Arai 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: 10563793
    Abstract: Provided is a low alloy oil-well steel pipe having a yield strength of 827 MPa or more, and an excellent SSC resistance. The low alloy oil-well steel pipe according to the present invention consisting of: in mass %, C: more than 0.35 to 0.65%; Si: 0.05 to 0.50%; Mn: 0.10 to 1.00%; Cr: 0.40 to 1.50%; Mo: 0.50 to 2.00%; V: 0.05 to 0.25%; Nb: 0.01 to 0.040%; sol.Al: 0.005 to 0.10%; N: 0.007% or less; Ti: 0 to 0.012%; Ca: 0 to 0.005%; and a balance being Fe and impurities, the impurities including: P: 0.020% or less; S: 0.002% or less; O: 0.006% or less; Ni: 0.10% or less; Cu: 0.03% or less; and B: 0.0005% or less, wherein in a microstructure, a number of cementite particles each of which has an equivalent circle diameter of 200 nm or more is 200 particles/100 ?m2 or more, and a yield strength is 827 MPa or more.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: February 18, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Keiichi Kondo, Yuji Arai
  • Publication number: 20200040436
    Abstract: The steel material according to the present invention contains a chemical composition consisting of, in mass %, C: 0.25 to 0.50%, Si: 0.05 to 0.50%, Mn: 0.05 to 1.00%, P: 0.025% or less, S: 0.0100% or less, Al: 0.005 to 0.100%, Cr: 0.30 to 1.50%, Mo: 0.25 to 1.50%, Ti: 0.002 to 0.050%, B: 0.0001 to 0.0050%, N: 0.002 to 0.010% and O: 0.0100% or less, with the balance being Fe and impurities. The steel material also contains an amount of dissolved C within a range of 0.010 to 0.050 mass %. The steel material also contains an yield strength is in a range of 862 to less than 965 MPa, and an yield ratio is 90% or more.
    Type: Application
    Filed: October 6, 2017
    Publication date: February 6, 2020
    Inventors: Yuji Arai, Shinji Yoshida, Atsushi Soma, Hiroki Kamitani
  • Patent number: 10550962
    Abstract: The steel material according to this invention contains, in mass %, C: 0.15 to 0.45%, Si: 0.10 to 1.0%, Mn: 0.10 to less than 0.90%, P: 0.05% or less, S: 0.01% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Cr: 0.1 to 2.5%, Mo: 0.35 to 3.0%, and Co: 0.50 to 3.0%, and satisfies expressions (1) and (2), and contains 90% or more of tempered martensite by volume ratio: C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15?Co/6+??0.50??(1 ) (3C+Mo+3Co)/(3Mn+Cr)?1.0??(2 ) Effective B=B?11(N?Ti/3.4)/14??(3 ) where, ? in expression (1) is 0.250 when effective B (mass %) defined by expression (3) is 0.0003% or more, and is 0 when the effective B is less than 0.0003.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: February 4, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventor: Yuji Arai
  • Publication number: 20200020306
    Abstract: Provided are an image processing apparatus, a program and an image processing method capable of avoiding interference with the function of another program. An image processing apparatus includes a position information detection unit configured to detect position information indicating a position on a display, a region position setting unit configured to set the position of the region of interest on the display based on the position information, and an image processing unit configured to perform image process on at least one image among an image inside of the region of interest and an image outside of the region of interest. The region position setting unit, when the position information is changed with the image process, sets the position of the region of interest based on the position information immediately before the change.
    Type: Application
    Filed: January 10, 2018
    Publication date: January 16, 2020
    Applicant: EIZO Corporation
    Inventors: Yuji HARUKI, Ikumi ARAI, Naoaki HIRATA, Yoichi UEDA, Tomoharu YACHIKAMI
  • Patent number: 10514564
    Abstract: A display unit (1) includes a transparent plate (11) and a display body. The transparent plate has a first surface and a second surface that are opposite to each other, and is disposed to allow substantially an entire region of the first surface to be exposed. The transparent plate has a curved shape that is bent in an arc shape in a first direction. The display body is joined to side of the second surface of the transparent plate to follow the curved shape.
    Type: Grant
    Filed: July 3, 2015
    Date of Patent: December 24, 2019
    Assignee: Sony Corporation
    Inventors: Yasunobu Kawasaki, Yuki Takano, Hisanori Tsuboi, Yuji Arai
  • Patent number: 10507629
    Abstract: A hot-dip galvanized steel sheet wherein the hot-dip galvanized steel sheet comprises a base steel sheet and a hot-dip galvanized layer, a ferrite phase is, by volume fraction, 40% or more and 97% or less in a range of ? thickness to ? thickness centered at a position of ¼ thickness from the surface of the base steel sheet, a hard structure is 3% or more in total, wherein the hot-dip galvanized steel sheet has the hot-dip galvanized layer in which Fe is 5.0% or less and Al is 1.0% or less, and columnar grains formed of a ? phase is 20% or more in an entire interface between the plated layer and the base steel sheet on the surface of the base steel sheet in which a ratio of a volume fraction of the hard structure in a surface layer range of 20 ?m depth in a steel sheet direction from an interface between the hot-dip galvanized layer and the base steel sheet is 0.10 times or more to 0.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: December 17, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hiroyuki Kawata, Takeshi Yasui, Kohei Ueda, Naoki Maruyama, Yuji Yamaguchi, Satoshi Uchida, Ryosuke Komami, Hayato Arai, Yasuhiro Nakashima, Toyomitsu Nakamura
  • Publication number: 20190376167
    Abstract: The steel material according to the present disclosure contains a chemical composition consisting of, in mass %, C: more than 0.50 to 0.80%, Si: 0.05 to 1.00%, Mn: 0.05 to 1.00%, P: 0.025% or less, S: 0.0100% or less, Al: 0.005 to 0.100%, Cr: 0.20 to 1.50%, Mo: 0.25 to 1.50%, Ti: 0.002 to 0.050%, B: 0.0001 to 0.0050%, N: 0.002 to 0.010% and O: 0.0100% or less, with the balance being Fe and impurities. The steel material contains an amount of dissolved C within a range of 0.010 to 0.060 mass %. The steel material also has a yield strength within a range of 965 to 1069 MPa, and a yield ratio of the steel material is 90% or more.
    Type: Application
    Filed: January 22, 2018
    Publication date: December 12, 2019
    Inventors: Shinji Yoshida, Yuji Arai, Atsushi Soma, Hiroki Kamitani
  • Patent number: 10487373
    Abstract: A steel pipe for line pipe has a composition of, in mass %: C: 0.02 to 0.11%; Si: 0.05 to 1.0%; Mn: 0.30 to 2.5%; P: up to 0.030%; S: up to 0.006%; Cr: 0.05 to 0.36%; Mo: 0.02 to 0.33%; V: 0.02 to 0.20%; Ti: 0.001 to 0.010%; Al: 0.001 to 0.100%; N: up to 0.008%; Ca: 0.0005 to 0.0040%; and other elements and satisfies Cr+Mo+V?0.40, the chemical symbols in the equation substituted by the content of the corresponding element in mass %. The pipe contains tempered martensite and/or tempered bainite and further contains ferrite in at least one of a portion between a steel pipe outer surface and a depth of 1 mm from the outer surface, and a portion between a steel pipe inner surface and a depth of 1 mm from the inner surface.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: November 26, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Taro Oe, Keiichi Kondo, Hiroki Kamitani, Yuji Arai
  • Patent number: 10480043
    Abstract: A seamless steel pipe for line pipe has a chemical composition consisting, by mass percent, of C: 0.03-0.15%, Si: ?0.50%, Mn: 1.0-2.0%, P: ?0.050%, S: ?0.005%, Cr: 0.1-1.0%, Al: 0.001-0.10%, N: ?0.01%, Ni: 0.05-2.0%, B: 0.0003-0.0015%, Ca: 0.0002-0.0050%, Mo: 0.10-0.50%, Ti: 0.001-0.05%, Cu: 0-2.0%, Nb: 0-0.05%, V: 0-0.10%, the balance: Fe and impurities, and satisfying the conditions of 2Nb+4V+Mo?0.50, wherein a metal micro-structure of the steel pipe contains 50% or more of bainite, in an area fraction, a wall thickness of the steel pipe is 25 mm or larger, and in a scale formed on the surface of the steel pipe, metal particles consisting mainly of Ni or Cu having an average circle-equivalent diameter of 0.1-5 mm exist. A distance from a boundary between the base metal of the steel pipe and the scale to a region in which the metal particles do not exist is 20 mm or longer.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: November 19, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yuji Arai, Yukimasa Ueda
  • Patent number: 10469692
    Abstract: A scanning exposure device includes a stage that supports a substrate, wherein a space is provided between a stage surface and the substrate; a light source unit that radiates light to a light irradiation area that extends in one direction above the substrate; and a scanning device that moves one or both of the stage and the light source unit relatively in a scanning direction that intersects the one direction. The scanning device is provided with an acceleration zone from a position in which the stage and the light source unit are at a standstill to a position in which the substrate supported by the stage enters the light irradiation area. The stage comprises a light shielding member that covers the space between the stage surface and the substrate at an end part of the stage.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: November 5, 2019
    Assignees: V TECHNOLOGY CO., LTD., SHARP KABUSHIKI KAISHA
    Inventors: Yuji Yoshida, Mineyuki Matsumoto, Toshinari Arai, Shigeki Tanaka, Keita Katayose, Hideyuki Suzuki, Makoto Kanbe
  • Patent number: 10443114
    Abstract: A steel material for oil country tubular goods that has a high strength and excellent SSC resistance is provided. The steel material according to this invention contains, in mass %, C: more than 0.45 to 0.65%, Si: 0.10 to 1.0%, Mn: 0.1 to 1.0%, P: 0.050% or less, S: 0.010% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Cr: 0.1 to 2.5%, Mo: 0.25 to 5.0%, and Co: 0.05 to 5.0%, and satisfies expressions (1) and (2), and contains 90% or more of tempered martensite by volume ratio: C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15?Co/6+??0.70??(1) (3C+Mo+3Co)/(3Mn+Cr)?1.0??(2) Effective B=B?11(N?Ti/3.4)/14??(3) where, ? in expression (1) is 0.250 when effective B (mass %) defined by expression (3) is 0.0003% or more, and is 0 when effective B is less than 0.0003%.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: October 15, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventor: Yuji Arai
  • Publication number: 20190300979
    Abstract: The seamless steel pipe of the present embodiment consists of in mass %, C: 0.21 to 0.35%, Si: 0.10 to 0.50%, Mn: 0.05 to 1.00%, P: 0.025% or less, S: 0.010% or less, Al: 0.005 to 0.100%, N: 0.010% or less, Cr: 0.05 to 1.50%, Mo: 0.10 to 1.50%, Nb: 0.010 to 0.050%, B: 0.0003 to 0.0050%, and Ti: 0.002 to 0.050%, the balance being Fe and impurities. In a main body region of the seamless steel pipe, a grain size number of prior-austenite grain conforming to ASTM E112 is 7.0 or more, a difference between a maximum value and a minimum value of the grain size number is 1.0 or less, yield strength is 655 to less than 862 MPa, and a difference between a maximum value and a minimum value of tensile strength is 27.6 MPa or less.
    Type: Application
    Filed: May 18, 2017
    Publication date: October 3, 2019
    Inventors: Atsushi Soma, Yuji Arai, Yosuke Tatebayashi, Keisuke Furo, Takenori Kuramoto, Hiroki Kamitani, Kouji Yamane
  • Patent number: 10415125
    Abstract: A thick-wall oil-well steel pipe has a wall thickness of 40 mm or more, excellent SSC resistance and high strength. The thick-wall oil-well steel pipe has a composition containing, in mass %, C: 0.40 to 0.65%, Si: 0.05 to 0.50%, Mn: 0.10 to 1.0%, P: 0.020% or less, S: 0.0020% or less, sol. Al: 0.005 to 0.10%, Cr more than 0.40 to 2.0%, Mo: more than 1.15 to 5.0%, Cu: 0.50% or less, Ni: 0.50% or less, N: 0.007% or less, and O: 0.005% or less. The number of carbide which has a circle equivalent diameter of 100 nm or more and contains 20 mass % or more of Mo is 2 or less per 100 mm2. The thick-wall oil-well steel pipe has yield strength of 827 MPa or more. A difference between a maximum value and a minimum value of the yield strength in the wall-thickness direction is 45 MPa or less.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: September 17, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yuji Arai, Keiichi Kondo, Koji Nagahashi
  • Patent number: 10407758
    Abstract: A steel for oil country tubular goods includes, as a chemical composition, by mass %, C, Si, Mn, Al, Mo, P, S, O, N, and a balance containing Fe and impurities, wherein a full width at half maximum HW of a crystal plane corresponding to a (211) crystal plane of an ? phase and a carbon content expressed in mass % in the chemical composition satisfy HW×C1/2?0.38, the carbon content and a molybdenum content expressed in mass % in the chemical composition satisfy C×Mo?0.6, a number of M2C carbides having a hexagonal crystal structure and having an equivalent circle diameter of 1 nm or more is 5 pieces or more per one square micron, and an yield strength is 758 MPa or more.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: September 10, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Tomohiko Omura, Yuji Arai, Kaori Kawano, Akihiro Sakamoto, Kazuo Okamura, Kenji Yamamoto, Keiichi Kondo, Koji Nagahashi, Masanao Seo
  • Patent number: 10392675
    Abstract: There is provided a seamless steel pipe having high strength and high toughness even if having a thick wall. A seamless steel pipe according to the present embodiment consists of: in mass %, C: 0.03 to 0.08%, Si: not more than 0.25%, Mn: 0.3 to 2.0%, P: not more than 0.05%, S: not more than 0.005%, Al: 0.001 to 0.10%, Cr: 0.02 to 1.0%, Ni: 0.02 to 1.0%, Mo: 0.02 to 0.8%, N: 0.002 to 0.008%, Ca: 0.0005 to 0.005%, and Nb: 0.01 to 0.1%, the balance being Fe and impurities, and has a wall thickness of not less than 50 mm.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: August 27, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Yukimasa Ueda, Yuji Arai
  • Publication number: 20190226063
    Abstract: The steel material according to the present invention contains, in mass %, C: 0.15 to 0.45%, Si: 0.10 to 1.0%, Mn: 0.10 to 0.8%, P: 0.050% or less, S: 0.010% or less, Al: 0.01 to 0.1%, N: 0.010% or less, Cr: 0.1 to 2.5%, Mo: 0.35 to 3.0%, Co: 0.05 to 2.0%, Ti: 0.003 to 0.040%, Nb: 0.003 to 0.050%, Cu: 0.01 to 0.50%, and Ni: 0.01 to 0.50%, and satisfies the following Formulae. A prior-austenite grain diameter of its microstructure is less than 5 ?m, and a block diameter of its microstructure is less than 2 ?m. The microstructure contains a total of 90% by volume or more of tempered martensite and tempered bainite. C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15?Co/6+??0.70??(1) (3C+Mo+3Co)/(3Mn+Cr)?1.
    Type: Application
    Filed: August 30, 2017
    Publication date: July 25, 2019
    Inventors: Yuji Arai, Kengo Hata
  • Publication number: 20190177813
    Abstract: A seamless steel pipe is provided that has a chemical composition which consists of, by mass %, C: 0.10 to 0.20%, Si: 0.05 to 1.0%, Mn: 0.05 to 1.2%, P?0.025%, S?0.005%, Cu?0.20%, N?0.007%, Ni: 0.20 to 0.50%, Cr: 0.30% or more and less than 0.50%, Mo: 0.30 to 0.50%, Nb: 0.01 to 0.05%, Al: 0.001 to 0.10%, B: 0.0005 to 0.0020%, Ti: 0.003 to 0.050%, V: 0.01 to 0.20%, a total of any one or more elements among Ca, Mg and REM: 0 to 0.025%, and the balance: Fe and impurities, and for which Pcm (=C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B)?0.30. The steel micro-structure includes, in area %, tempered martensite ?90%. The tensile strength is 980 MPa or more, and a Charpy impact value at ?40° C. using a 2 mm V-notch test specimen is 75 J/cm2 or more.
    Type: Application
    Filed: July 28, 2017
    Publication date: June 13, 2019
    Inventors: Takeshi Miki, Yuji Arai, Yusuke Mihara, Yohsuke Uchida, Masahiro Yamazaki, Masayuki Yamamoto
  • Patent number: 10287645
    Abstract: A steel has a chemical composition consisting of, by mass percent, C: 0.15-0.65%, Si: 0.05-0.5%, Mn: 0.1-1.5%, Cr: 0.2-1.5%, Mo: 0.1-2.5%, Ti: 0.005-0.50%, Al: 0.001-0.50%, and optionally at least one element selected from Nb: ?0.4%, V: ?0.5%, and B: ?0.01%, Ca: ?0.005%, Mg: ?0.005%, and REM: ?0.005%, and the balance of Fe and impurities, wherein Ni, P, S, N and O as impurities are Ni: ?0.1%, P: ?0.04%, S: ?0.01%, N: ?0.01%, and O: ?0.01%. The steel is hot-worked into a shape and then sequentially subjected to heating the steel to a temperature exceeding the Ac1 transformation point and lower than the Ac3 transformation point and cooling. Then, a step of reheating the steel to a temperature not lower than the Ac3 transformation point and quenching the steel by rapid cooling, and a step of tempering the steel at a temperature not higher than the Ac1 transformation point are performed.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: May 14, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Keiichi Kondo, Yuji Arai
  • Patent number: 10233520
    Abstract: A low-alloy steel pipe includes C: 0.15% to less than 0.30%, Si: 0.05 to 1.00%, Mn: 0.05 to 1.00%, P: at most 0.030%, S: at most 0.0050%, Al: 0.005 to 0.100%, O: at most 0.005%, N: at most 0.007%, Cr: 0.10% to less than 1.00%, Mo: 1.0% to not more than 2.5%, V: 0.01 to 0.30%, Ti: 0.002 to 0.009%. Nb: 0 to 0.050%, B: 0 to 0.0050%, Ca: 0 to 0.0050%, Mo/Cr?2.0, and the balance being Fe and impurities. The pipe has a crystal grain size number of 7.0 or more, 50 or more particles of cementite based on equivalent circle diameter and area of the matrix, M2C-based alloy carbide in a number density of not less than 25/?m2, and a yield strength of 758 MPa or more.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: March 19, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Atsushi Soma, Yuji Arai
  • Publication number: 20190063641
    Abstract: The steel material according to this invention contains, in mass %, C: 0.15 to 0.45%, Si: 0.10 to 1.0%, Mn: 0.10 to less than 0.90%, P: 0.05% or less, S: 0.01% or less, Al: 0.01 to 0.1%, N: 0.01% or less, Cr: 0.1 to 2.5%, Mo: 0.35 to 3.0%, and Co: 0.50 to 3.0%, and satisfies expressions (1) and (2), and contains 90% or more of tempered martensite by volume ratio: C+Mn/6+(Cr+Mo+V)/5+(Cu+Ni)/15?Co/6+??0.50 ??(1) (3C+Mo+3Co)/(3Mn+Cr)?1.0 ??(2) Effective B=B?11(N?Ti/3.4)/14 ??(3) where, ? in expression (1) is 0.250 when effective B (mass %) defined by expression (3) is 0.0003% or more, and is 0 when effective B is less than 0.0003%.
    Type: Application
    Filed: February 20, 2017
    Publication date: February 28, 2019
    Inventor: Yuji ARAI