Patents by Inventor Yasuhisa Aono

Yasuhisa Aono 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: 20220341002
    Abstract: An object of the present invention is to provide a Zr—Nb-based alloy material as a low-magnetic susceptibility alloy having a high corrosion resistance while maintaining a magnetic susceptibility equivalent to or less than the magnetic susceptibility of the biological alloy of the related art, a method for manufacturing the alloy material, and a Zr—Nb-based alloy product. The Zr—Nb-based alloy material according to the present invention includes, as a chemical composition, 3% by mass or more and 18% by mass or less of Nb, 12% by mass or less of Ti, 6% by mass or less of Cr, 6% by mass or less of Cu, 5% by mass or less of Bi, and a remainder consisting of Zr and unavoidable impurities, in which isothermal ? phase particles are dispersed and precipitated in ? phase crystal grains of a parent phase.
    Type: Application
    Filed: September 29, 2020
    Publication date: October 27, 2022
    Applicant: Hitachi Metals, Ltd.
    Inventors: Shinya TAMURA, Tomonori KIMURA, Yasuhisa AONO
  • Patent number: 11180833
    Abstract: There is provided a Cr-based two-phase alloy including two phases of a ferrite phase and an austenite phase that are mixed with each other. A chemical composition of the Cr-based two-phase alloy consists of a main component, an auxiliary component, impurities, a first optional auxiliary component, and a second optional auxiliary component. The main component consists of 33-61 mass % Cr, 18-40 mass % Ni and 10-33 mass % Fe, and a total content of the Ni and the Fe is 37-65 mass %. The auxiliary component consists of 0.1-2 mass % Mn, 0.1-1 mass % Si, 0.005-0.05 mass % Al, and 0.02-0.3 mass % Sn. The impurities include 0.04 mass % or less of P, 0.01 mass % or less of S, 0.03 mass % or less of C, 0.04 mass % or less of N, and 0.05 mass % or less of O.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: November 23, 2021
    Assignee: HITACHI, LTD.
    Inventors: Tomonori Kimura, Yasuhisa Aono, Makoto Ogata, Naoya Tokoo, Yasuo Kondo, Masafumi Noujima
  • Patent number: 10718038
    Abstract: An object of the invention is to provide: a two-phase alloy as a metal material that can be preferably utilized under circumstances of a temperature range and a high corrosion as in an oil well, the two-phase alloy having a high corrosion resistance and good mechanical properties that are equivalent or more than those of conventional ones, and saving a cost; a product of the two-phase alloy; and a method for producing the product. There is provided a two-phase alloy containing Cr as a major component and including two phases of an austenite phase and a ferrite phase in a mixed state. The alloy has a chemical composition containing: 34-70 mass % of Cr; 17-45 mass % of Ni; 10-35 mass % of Fe; 0.1-2 mass % of Mn; 0.1-1 mass % of Si; and impurities. The total content of the Ni and the Fe is 30-65 mass %.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: July 21, 2020
    Assignee: HITACHI, LTD.
    Inventors: Masafumi Noujima, Yasuhisa Aono, Naoya Okizaki, Yusaku Maruno, Tomonori Kimura, Makoto Ogata
  • Publication number: 20190100825
    Abstract: There is provided a Cr-based two-phase alloy including two phases of a ferrite phase and an austenite phase that are mixed with each other. A chemical composition of the Cr-based two-phase alloy consists of a main component, an auxiliary component, impurities, a first optional auxiliary component, and a second optional auxiliary component. The main component consists of 33-61 mass % Cr, 18-40 mass % Ni and 10-33 mass % Fe, and a total content of the Ni and the Fe is 37-65 mass %. The auxiliary component consists of 0.1-2 mass % Mn, 0.1-1 mass % Si, 0.005-0.05 mass % Al, and 0.02-0.3 mass % Sn. The impurities include 0.04 mass % or less of P, 0.01 mass % or less of S, 0.03 mass % or less of C, 0.04 mass % or less of N, and 0.05 mass % or less of O.
    Type: Application
    Filed: January 19, 2017
    Publication date: April 4, 2019
    Applicant: HITACHI, LTD.
    Inventors: Tomonori KIMURA, Yasuhisa AONO, Makoto OGATA, Naoya TOKOO, Yasuo KONDO, Masafumi NOUJIMA
  • Publication number: 20190071754
    Abstract: An object of the invention is to provide a two-phase alloy which contains inexpensive Cr as a main component, and which is superior in strength properties including corrosion resistance and toughness, and in abrasion resistance to conventional ones under a high corrosion circumstance such as in an oil well. The invention is a Cr based two-phase alloy including two phases of a ferrite phase and an austenite phase in a mixed state, in which a chemical composition of the Cr based two-phase alloy consists of a major component, an accessory component, impurities, a first optional accessory component, and a second optional accessory component, and the major component consists of 33% by mass or more and 65% by mass or less of Cr, 18% by mass or more and 40% by mass or less of Ni, and 10% by mass or more and 33% by mass or less of Fe.
    Type: Application
    Filed: January 30, 2017
    Publication date: March 7, 2019
    Applicant: HITACHI, LTD.
    Inventors: Tomonori KIMURA, Masafumi NOUJIMA, Yasuhisa AONO, Makoto OGATA, Naoya TOKOO
  • Publication number: 20170292175
    Abstract: An object of the invention is to provide: a two-phase alloy as a metal material that can be preferably utilized under circumstances of a temperature range and a high corrosion as in an oil well, the two-phase alloy having a high corrosion resistance and good mechanical properties that are equivalent or more than those of conventional ones, and saving a cost; a product of the two-phase alloy; and a method for producing the product. There is provided a two-phase alloy containing Cr as a major component and including two phases of an austenite phase and a ferrite phase in a mixed state. The alloy has a chemical composition containing: 34-70 mass % of Cr; 17-45 mass % of Ni; 10-35 mass % of Fe; 0.1-2 mass % of Mn; 0.1-1 mass % of Si; and impurities. The total content of the Ni and the Fe is 30-65 mass %.
    Type: Application
    Filed: September 28, 2015
    Publication date: October 12, 2017
    Applicant: HITACHI, LTD.
    Inventors: Masafumi NOUJIMA, Yasuhisa AONO, Naoya OKIZAKI, Yusaku MARUNO, Tomonori KIMURA, Makoto OGATA
  • Publication number: 20140205485
    Abstract: A water atomized Fe powder for a magnetic compact reduced in deformation resistance during molding and annealing temperature for removing strains is provided. A compact having improved magnetic properties is also provided. The water atomized powder containing at least one element selected from Nb, Ta, Ti, Zr and V in an amount of 0.001-0.03 atom % is soft magnetic and has a precipitation in the matrix, which is composed of at least one element selected from Nb, Ta, Ti, Zr and V and oxygen as a main component and has an average size of 0.02-0.5 ?m. Disclosed is a method for manufacturing a soft magnetic powder includes adding at least one element selected from Nb, Ta, Ti, Zr and V, and annealing in a hydrogen-containing reduction atmosphere. This method decrease gaseous impurities, particularly oxygen, and defuse it, to improve the magnetic properties of the powder and compact.
    Type: Application
    Filed: March 20, 2014
    Publication date: July 24, 2014
    Applicant: Hitachi, Ltd.
    Inventors: Kazuya NISHI, Yasuhisa AONO
  • Publication number: 20090295518
    Abstract: A water atomized Fe powder for a magnetic compact reduced in deformation resistance during molding and annealing temperature for removing strains is provided. A compact having improved magnetic properties is also provided. The water atomized powder containing at least one element selected from Nb, Ta, Ti, Zr and V in an amount of 0.001-0.03 atom % is soft magnetic and has a precipitation in the matrix, which is composed of at least one element selected from Nb, Ta, Ti, Zr and V and oxygen as a main component and has an average size of 0.02-0.5 ?m. Disclosed is a method for manufacturing a soft magnetic powder includes adding at least one element selected from Nb, Ta, Ti, Zr and V, and annealing in a hydrogen-containing reduction atmosphere. This method decrease gaseous impurities, particularly oxygen, and defuse it, to improve the magnetic properties of the powder and compact.
    Type: Application
    Filed: May 28, 2009
    Publication date: December 3, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Kazuya Nishi, Yasuhisa Aono
  • Patent number: 7480992
    Abstract: The present invention is a cooling plate including a groove, which becomes a passage of a coolant, inside a body, wherein one or more fins are provided inside the groove, wherein the groove is covered with a lid having width larger than the groove, wherein the lid is joined to the body by friction stir welding, and wherein a weld bead formed by: the joining is outside the passage, and the weld bead formed by the joining is formed within the body and further, is characterized by a manufacturing method of a cooling plate that has a first groove, which becomes a passage of a coolant, and a second groove, which has width larger than the first groove and receives a lid on the first groove, inside a body, receives the lid on the second groove, and is joined to the body, the manufacturing method of a cooling plate wherein, while the lid and the body are joined together by the friction stir welding owing to insertion of a-rotation tool having a shoulder and a pin, the joining is performed so that a weld bead formed b
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: January 27, 2009
    Assignees: Hitachi, Ltd., HItachi Cable, Ltd.
    Inventors: Kazutaka Okamoto, Masayuki Doi, Hisanori Okamura, Yasuhisa Aono, Manabu Kagawa, Satoshi Hirano, Kinya Aota
  • Patent number: 7416814
    Abstract: A lithium secondary battery, which comprises a positive electrode, a negative electrode containing a lithium ion-storable/dischargeable negative electrode-active material and a lithium ion conductive, non-aqueous electrolytic solution or polymer electrolyte can have distinguished charging/discharging characteristics and a higher safety, when the negative electrode material contains particles comprising carbonaceous materials and at least one of elements capable of forming a compound with Li; the elements have a melting point of at least 900° C. and a thermal expansion coefficient of not more than 9 ppm/K at room temperature; the particles are embedded in a plurality of layers of the carbonaceous materials; the particles being subjected to a mechanical treatment to make particle sizes of the particles smaller than the initial particle size in advance.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: August 26, 2008
    Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.
    Inventors: Junya Kaneda, Noriyuki Watanabe, Yasuhisa Aono, Seiji Takeuchi, Yasushi Muranaka, Kouichi Takei
  • Publication number: 20070163120
    Abstract: The present invention is a cooling plate including a groove, which becomes a passage of a coolant, inside a body, wherein one or more fins are provided inside the groove, wherein the groove is covered with a lid having width larger than the groove, wherein the lid is joined to the body by friction stir welding, and wherein a weld bead formed by: the joining is outside the passage, and the weld bead formed by the joining is formed within the body and further, is characterized by a manufacturing method of a cooling plate that has a first groove, which becomes a passage of a coolant, and a second groove, which has width larger than the first groove and receives a lid on the first groove, inside a body, receives the lid on the second groove, and is joined to the body, the manufacturing method of a cooling plate wherein, while the lid and the body are joined together by the friction stir welding owing to insertion of a-rotation tool having a shoulder and a pin, the joining is performed so that a weld bead formed b
    Type: Application
    Filed: March 29, 2007
    Publication date: July 19, 2007
    Applicant: HITACHI CABLE, LTD.
    Inventors: Kazutaka OKAMOTO, Masayuki DOI, Hisanori OKAMURA, Yasuhisa AONO, Manabu KAGAWA, Satoshi HIRANO, Kinya AOTA
  • Patent number: 7218266
    Abstract: An electromagnetic wave absorber for use in the high frequency range above 1 Ghz and a composite member are characterized by the fact that magnetic metal grains are covered with ceramic above 20 volume %. Further, a method of manufacturing the electromagnetic absorber and the composite member is characterized by the fact that composite magnetic particles, in which a plurality of magnetic metal grains and ceramic are unified, are formed through a mechanical alloying method applied to a composite powder composed of magnetic metal powder and ceramic powder. The electromagnetic wave absorber can be used in a semiconductor device, an optical sending module, an optical receiving module, an optical sending and receiving module, an automatic tollgate in which erroneous operation due to electromagnetic wave disturbance is provided by use of the electromagnetic wave absorber.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: May 15, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Fujieda, Shinzou Ikeda, Sai Ogawa, Teruyoshi Abe, Yasuhisa Aono
  • Patent number: 7108939
    Abstract: A catalytic material and electrode of the present invention are characterized in that the catalyst carrier constituting the above-mentioned catalytic material and electrode includes at least one member selected from the group consisting of nitrogen atoms, oxygen atoms, phosphor atoms, and sulfur atoms. Since the cohesion or growth of catalyst grains can hereby be suppressed, it is possible to provide a highly active catalyst, a high-performance electrode, and a high-output-density fuel cell which uses the same.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: September 19, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Shuichi Suzuki, Chahn Lee, Yuichi Satsu, Kishio Hidaka, Mitsuo Hayashibara, Yoshiyuki Takamori, Tomoichi Kamo, Yasuhisa Aono
  • Patent number: 7105246
    Abstract: A catalytic material and electrode of the present invention are characterized in that the catalyst carrier constituting the above-mentioned catalytic material and electrode includes at least one member selected from the group consisting of nitrogen atoms, oxygen atoms, phosphor atoms, and sulfur atoms. Since the cohesion or growth of catalyst grains can hereby be suppressed, it is possible to provide a highly active catalyst, a high-performance electrode, and a high-output-density fuel cell which uses the same.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: September 12, 2006
    Assignee: Hiatchi Ltd.
    Inventors: Shuichi Suzuki, Chahn Lee, Yuichi Satsu, Kishio Hidaka, Mitsuo Hayashibara, Yoshiyuki Takamori, Tomoichi Kamo, Yasuhisa Aono
  • Publication number: 20060096748
    Abstract: The present invention is a cooling plate including a groove, which becomes a passage of a coolant, inside a body, wherein one or more fins are provided inside the groove, wherein the groove is covered with a lid having width larger than the groove, wherein the lid is joined to the body by friction stir welding, and wherein a weld bead formed by: the joining is outside the passage, and the weld bead formed by the joining is formed within the body and further, is characterized by a manufacturing method of a cooling plate that has a first groove, which becomes a passage of a coolant, and a second groove, which has width larger than the first groove and receives a lid on the first groove, inside a body, receives the lid on the second groove, and is joined to the body, the manufacturing method of a cooling plate wherein, while the lid and the body are joined together by the friction stir welding owing to insertion of a-rotation tool having a shoulder and a pin, the joining is performed so that a weld bead formed b
    Type: Application
    Filed: December 14, 2005
    Publication date: May 11, 2006
    Applicants: Hitachi, Ltd., Hitachi Cable Ltd.
    Inventors: Kazutaka Okamoto, Masayuki Doi, Hisanori Okamura, Yasuhisa Aono, Manabu Kagawa, Satoshi Hirano, Kinya Aota
  • Publication number: 20050221191
    Abstract: An object of the present invention is to inhibit intergranular corrosion of a lead alloy by grain refining, and to prolong the life and improve the reliability of a lead battery using the alloy for a positive current collector in the battery. The intergranular corrosion of the lead alloy is inhibited by adding Sr to a Pb—Sn alloy to refine a cast structure and the recrystallized structure of a rolled material, and the hardness is improved by further adding Ca, Ba and Te. In addition, the rolled sheet of the lead alloy is used in the positive current collector of the lead storage battery.
    Type: Application
    Filed: February 10, 2005
    Publication date: October 6, 2005
    Inventors: Yasuo Kondo, Kyoko Honbo, Masanori Sakai, Yasuhisa Aono, Tokiyoshi Hirasawa, Masayuki Terada, Yoshifumi Yamada, Takayuki Kimura
  • Patent number: 6919387
    Abstract: An electromagnetic wave absorber for use in the high frequency range above 1 Ghz and a composite member are characterized by the fact that magnetic metal grains are covered with ceramic above 20 volume %. Further, a method of manufacturing the electromagnetic absorber and the composite member is characterized by the fact that composite magnetic particles, in which a plurality of magnetic metal grains and ceramic are unified, are formed through a mechanical alloying method applied to a composite powder composed of magnetic metal powder and ceramic powder. The electromagnetic wave absorber can be used in a semiconductor device, an optical sending module, an optical receiving module, an optical sending and receiving module, an automatic tollgate in which erroneous operation due to electromagnetic wave disturbance is provided by use of the electromagnetic wave absorber.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: July 19, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Fujieda, Shinzou Ikeda, Sai Ogawa, Teruyoshi Abe, Yasuhisa Aono
  • Publication number: 20050140539
    Abstract: An electromagnetic wave absorber for use in the high frequency range above 1 Ghz and a composite member are characterized by the fact that magnetic metal grains are covered with ceramic above 20 volume %. Further, a method of manufacturing the electromagnetic absorber and the composite member is characterized by the fact that composite magnetic particles, in which a plurality of magnetic metal grains and ceramic are unified, are formed through a mechanical alloying method applied to a composite powder composed of magnetic metal powder and ceramic powder. The electromagnetic wave absorber can be used in a semiconductor device, an optical sending module, an optical receiving module, an optical sending and receiving module, an automatic tollgate in which erroneous operation due to electromagnetic wave disturbance is provided by use of the electromagnetic wave absorber.
    Type: Application
    Filed: February 28, 2005
    Publication date: June 30, 2005
    Inventors: Tadashi Fujieda, Shinzou Ikeda, Sai Ogawa, Teruyoshi Abe, Yasuhisa Aono
  • Publication number: 20050142429
    Abstract: A catalytic material and electrode of the present invention are characterized in that the catalyst carrier constituting the above-mentioned catalytic material and electrode includes at least one member selected from the group consisting of nitrogen atoms, oxygen atoms, phosphor atoms, and sulfur atoms. Since the cohesion or growth of catalyst grains can hereby be suppressed, it is possible to provide a highly active catalyst, a high-performance electrode, and a high-output-density fuel cell which uses the same.
    Type: Application
    Filed: February 22, 2005
    Publication date: June 30, 2005
    Inventors: Shuichi Suzuki, Chahn Lee, Yuichi Satsu, Kishio Hidaka, Mitsuo Hayashibara, Yoshiyuki Takamori, Tomoichi Kamo, Yasuhisa Aono
  • Publication number: 20050129564
    Abstract: A magnesium alloy consisting essentially of 10 to 15% by weight of Al, 0.5 to 10% by weight of Sn, 0.1 to 3% by weight of Y, and 0.1 to 1% by weight of Mn, the balance being Mg and inevitable impurities.
    Type: Application
    Filed: November 24, 2004
    Publication date: June 16, 2005
    Inventors: Kiyomi Nakamura, Mitsuo Hayashibara, Masahisa Inagaki, Yasuhisa Aono, Shigeyuki Kemma