Patents by Inventor Takuya Murai
Takuya Murai 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).
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Patent number: 12031190Abstract: A method for producing a Ni- or Ti-based alloy product includes preliminarily processing a hot working material of a Ni- or Ti-based alloy after hot working into a predetermined shape; heating and holding the material at a solution treatment temperature to obtain a material held in a heated state; and cooling the material to obtain a solution-treated material. The cooling step includes placing a flow path-forming member having a space for forming a flow path for a fluid on a surface of the material held in a heated state to form a fluid flow path defined by the surface of the material held in a heated state and an inner surface of the space of the flow path-forming member; and allowing a fluid to flow in the fluid flow path so that the fluid in the flow path locally cools a part of the surface of the material.Type: GrantFiled: November 26, 2020Date of Patent: July 9, 2024Assignee: PROTERIAL, LTD.Inventors: Mari Yoshihara, Takuya Murai, Tadashi Fukuda, Shoichi Takahashi
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Publication number: 20220403493Abstract: Provided is a method for producing a Ni- or Ti-based alloy product, the method capable of reliably locally cooling and effectively cooling. The method includes the steps: heating and holding a hot working material of a Ni- or Ti-based alloy after hot forging or hot ring rolling at a solution treatment temperature to obtain a material held in a heated state, and cooling the material held in a heated state to obtain a solution-treated material. The cooling step includes carrying out local cooling by contacting a cooling member with a part of a surface of the material held in a heated state.Type: ApplicationFiled: November 26, 2020Publication date: December 22, 2022Inventors: Mari YOSHIHARA, Takuya MURAI, Tadashi FUKUDA, Shoichi TAKAHASHI
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Publication number: 20220389535Abstract: Provided is a method for producing a Ni- or Ti-based alloy product, the method capable of locally increasing the cooling rate and effectively cooling. The method includes the steps: preliminarily processing a hot working material of a Ni- or Ti-based alloy after hot working into a predetermined shape; heating and holding the material at a solution treatment temperature to obtain a material held in a heated state; and cooling the material held in a heated state to obtain a solution-treated material. The cooling step includes placing a flow path-forming member having a space for forming a flow path for a fluid on a surface of the material held in a heated state to form a fluid flow path defined by the surface of the material held in a heated state and an inner surface of the space of the flow path-forming member; and allowing a fluid to flow in the fluid flow path so that the fluid in the flow path locally cools a part of the surface of the material held in a heated state.Type: ApplicationFiled: November 26, 2020Publication date: December 8, 2022Inventors: Mari YOSHIHARA, Takuya MURAI, Tadashi FUKUDA, Shoichi TAKAHASHI
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Patent number: 11135642Abstract: A method for manufacturing a ring-rolled product, which manufactures the ring-rolled product from a ring material, includes a step of rolling the ring material, which has an operation of rolling the ring material from both inner and outer circumferential sides thereof between a mandrel roll and a main roll in a state of rotating the ring material toward one side in a circumferential direction thereof, and induction-heating the ring material by induction heating elements. An induction heating element is disposed on only an outer circumferential side of the ring material or is disposed on each of both the inner and outer circumferential sides in a region immediately before the rolling, or an inclined portion is provided in an outer-peripheral edge portion of a coil in the induction heating element.Type: GrantFiled: December 1, 2016Date of Patent: October 5, 2021Assignee: HITACHI METALS, LTD.Inventors: Takuya Murai, Takanori Matsui, Yuji Ishiwari, Tomoyoshi Kiwake
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Patent number: 11077481Abstract: A method for manufacturing a ring-rolled product forms the ring-rolled product from a ring material by using a mandrel roll and a main roll. The mandrel roll and the main roll are configured so as to contact inner and outer circumferential surfaces of the ring material, respectively, and are configured so as to press the ring material in a radial direction thereof in a state in which the ring material is rotated in a circumferential direction thereof. The method includes a step of rolling the ring material that includes an operation of induction-heating the main roll by at least one induction heating element and rolling the ring material between the mandrel roll and the main roll, which is induction-heated.Type: GrantFiled: December 1, 2016Date of Patent: August 3, 2021Assignee: HITACHI METALS, LTD.Inventors: Takuya Murai, Takanori Matsui, Yuji Ishiwari, Tomoyoshi Kiwake
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Publication number: 20200306818Abstract: A method for manufacturing a ring-rolled product forms the ring-rolled product from a ring material by using a mandrel roll and a main roll. The mandrel roll and the main roll are configured so as to contact inner and outer circumferential surfaces of the ring material, respectively, and are configured so as to press the ring material in a radial direction thereof in a state in which the ring material is rotated in a circumferential direction thereof. The method includes a step of rolling the ring material that includes an operation of induction-heating the main roll by at least one induction heating element and rolling the ring material between the mandrel roll and the main roll, which is induction-heated.Type: ApplicationFiled: December 1, 2016Publication date: October 1, 2020Inventors: Takuya MURAI, Takanori MATSUI, Yuji ISHIWARI, Tomoyoshi KIWAKE
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Publication number: 20200306817Abstract: A method for manufacturing a ring-rolled product, which manufactures the ring-rolled product from a ring material, includes a step of rolling the ring material, which has an operation of rolling the ring material from both inner and outer circumferential sides thereof between a mandrel roll and a main roll in a state of rotating the ring material toward one side in a circumferential direction thereof, and induction-heating the ring material by induction heating elements. An induction heating element is disposed on only an outer circumferential side of the ring material or is disposed on each of both the inner and outer circumferential sides in a region immediately before the rolling, or an inclined portion is provided in an outer-peripheral edge portion of a coil in the induction heating element.Type: ApplicationFiled: December 1, 2016Publication date: October 1, 2020Inventors: Takuya MURAI, Takanori MATSUI, Yuji ISHIWARI, Tomoyoshi KIWAKE
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Publication number: 20200110410Abstract: A device that processes map data used in self-position estimation of a mobile body including an external sensor, includes a processor and a memory that stores a computer program executable by the processor. The processor reads data from a storage device storing data of a two-dimensional map including a point cloud or occupied grids is stored according to a command of the computer program, extracts from the two-dimensional map one or more line segments defined by the point cloud or the occupied points on the two-dimensional map, selects at least one specific region from at least one region included in one or more line segments or at least one region defined by at least one pair of line segments, and associates additional data indicating a position of a specific region on the two-dimensional map with the data.Type: ApplicationFiled: October 1, 2019Publication date: April 9, 2020Inventors: Takuya MURAI, Tetsuo SAEKI, Shinji SUZUKI
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Publication number: 20200061686Abstract: In a method of cooling a main roll, strength of a shaft and a peripheral portion thereof of the main roll is sufficiently secured, maintenance of the main roll is facilitated, and the shaft and the peripheral portion thereof of the main roll are efficiently cooled. In a method of manufacturing a ring rolled body, a high-quality ring rolled body is produced. The present invention relates to a method of cooing a main roll 1 for ring rolling in a state in which one side, in the rotation axis direction, of the main roll 1 faces upward, and relates to a method of manufacturing a ring rolled body, including the cooling method. In the cooling method, the shaft 11 is cooled by injecting a liquid W into a receiving part 13, 17 which is recessed from an upper end surface 12c of a die 12 of the main roll 1 facing the one side in the rotation axis direction and surrounds the shaft 11 of the main roll 1.Type: ApplicationFiled: March 28, 2018Publication date: February 27, 2020Inventors: Takuya MURAI, Takanori MATSUI, Tomoyoshi KIWAKE
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Patent number: 8211360Abstract: A Ni-based heat resistant alloy for a gas turbine combustor, comprising a composition containing, in mass %, Cr: 14.0 to 21.5%, Co: 6.5 to 14.5%, Mo: 6.5 to 10.0%, W: 1.5 to 3.5%, Al: 1.2 to 2.4%, Ti: 1.1 to 2.1%; Fe: 7.0% or less, B: 0.001 to 0.020%, C: 0.03 to 0.15%, and a balance consisting of Ni and unavoidable impurities, wherein a content of S and P contained in the unavoidable impurities is controlled to be, in mass %, S: 0.015% or less, and P: 0.015% or less, wherein the alloy has a texture in which M6C type carbide and MC type carbide are uniformly dispersed in ? phase matrix.Type: GrantFiled: April 13, 2007Date of Patent: July 3, 2012Assignees: Mitsubishi Materials Corporation, Mitsubishi Heavy Industries, LtdInventors: Takanori Matsui, Komei Kato, Takuya Murai, Yoshitaka Uemura, Daisuke Yoshida, Ikuo Okada
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Patent number: 8187531Abstract: A wire for welding Ni-based heat resistant alloy, comprising: a composition containing, in mass %, Cr: 14.0 to 21.5%, Co: 6.5 to 14.5%, Mo: 6.5 to 10.0%, W: 1.5 to 3.5%, Al: 1.2 to 2.4%, Ti: 1.1 to 2.1%; Fe: 7.0% or less, B: 0.0001 to 0.020%, C: 0.03 to 0.15%, and a balance of Ni and unavoidable impurities, wherein a content of S and P contained in the unavoidable impurities is controlled to be, in mass %, S: 0.004% or less, and P: 0.010% or less, wherein the wire has a texture in which M6C type carbide and MC type carbide are uniformly dispersed in the matrix.Type: GrantFiled: April 16, 2007Date of Patent: May 29, 2012Assignees: Mitsubishi Materials Corporation, Mitsubishi Heavy Industries, Ltd.Inventors: Takanori Matsui, Komei Kato, Takuya Murai, Yoshitaka Uemura, Daisuke Yoshida, Ikuo Okada
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Publication number: 20110171378Abstract: A method for producing covered particles, comprising: a mixing step of mixing a fluid containing particles comprising at least one type of substance selected from among metals, metal oxides and ceramics, a silsesquioxane having a functional group with an affinity for carbon dioxide, and supercritical carbon dioxide; and a covering step of reducing pressure of the fluid to gasify the supercritical carbon dioxide, while adhering the silsesquioxane onto the particles, and thereby obtaining covered particles comprising the particles and silsesquioxane covering the particles.Type: ApplicationFiled: January 6, 2011Publication date: July 14, 2011Applicants: TDK Corporation, National University Corporation Shizuoka UniversityInventors: Raitaro Masaoka, Takashi Ota, Hisayuki Abe, Takeshi Sako, Chang Yi Kong, Idzumi Okajima, Takuya Murai
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Publication number: 20090136382Abstract: A Ni-based heat resistant alloy for a gas turbine combustor, comprising a composition containing, in mass %, Cr: 14.0 to 21.5%, Co: 6.5 to 14.5%, Mo: 6.5 to 10.0%, W: 1.5 to 3.5%, Al: 1.2 to 2.4%, Ti: 1.1 to 2.1%; Fe: 7.0% or less, B: 0.001 to 0.020%, C: 0.03 to 0.15%, and a balance consisting of Ni and unavoidable impurities, wherein a content of S and P contained in the unavoidable impurities is controlled to be, in mass %, S: 0.015% or less, and P: 0.015% or less, wherein the alloy has a texture in which M6C type carbide and MC type carbide are uniformly dispersed in ? phase matrix.Type: ApplicationFiled: April 13, 2007Publication date: May 28, 2009Applicants: Mitsubishi Materials Corporation, Mitsubishi Heavy Industries, Ltd.Inventors: Takanori Matsui, Komei Kato, Takuya Murai, Yoshitaka Uemura, Daisuke Yoshida, Ikuo Okada
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Publication number: 20090123328Abstract: A wire for welding Ni-based heat resistant alloy, comprising: a composition containing, in mass %, Cr: 14.0 to 21.5%, Co: 6.5 to 14.5%, Mo: 6.5 to 10.0%, W: 1.5 to 3.5%, Al: 1.2 to 2.4%, Ti: 1.1 to 2.1%; Fe: 7.0% or less, B: 0.0001 to 0.020%, C: 0.03 to 0.15%, and a balance of Ni and unavoidable impurities, wherein a content of S and P contained in the unavoidable impurities is controlled to be, in mass %, S: 0.004% or less, and P: 0.010% or less, wherein the wire has a texture in which M6C type carbide and MC type carbide are uniformly dispersed in the matrix.Type: ApplicationFiled: April 16, 2007Publication date: May 14, 2009Applicants: Mitsubishi Materials Corporation, Mitsubishi Heavy Industries , Ltd.Inventors: Takanori Matsui, Komei Kato, Takuya Murai, Yoshitaka Uemura, Daisuke Yoshida, Ikuo Okada
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Publication number: 20020159559Abstract: The present invention provides a fuel cladding pipe made of Zr alloy for nuclear reactor having a high degree of strength and possessing superior resistance to corrosion. The fuel cladding pipe of the present invention is formed of a Zr alloy containing Nb in the range of 1.35˜2.15% by weight, with the remainder comprising Zr and inevitable impurities, or is formed of a Zr alloy containing Nb in the range of 0.4˜2.15% and Cr in the range of 0.01˜0.7%, with the remainder comprising Zr and inevitable impurities.Type: ApplicationFiled: January 4, 2002Publication date: October 31, 2002Inventors: Takeshi Isobe, Takuya Murai
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Publication number: 20010007638Abstract: Disclosed is a hydrogen occluding alloy used for a cathode of battery which enables to provide for a high discharge capacity at small number of charge/discharge cycles by a high-rate initial activation treatment and to increase a high-rate discharge capacity at low temperature.Type: ApplicationFiled: December 14, 2000Publication date: July 12, 2001Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Koichi Kita, Masahiro Wada, Katsuo Sugahara, Takeshi Isobe, Takuya Murai
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Patent number: 6083327Abstract: A Ni based hydrogen occluding alloy having the composition, comprising: by weight:(i) 32-38% of at least one of La or Ce,(ii) 0.1-17% Co,(iii) 0.1-3.5% Al,(iv) 0.5-10% Mn,(v) 0.005-0.1% of hydrogen, withthe balance being Ni and unavoidable impurities, wherein said alloy has a microstructure of a phase having a Ce.sub.2 Ni.sub.7 -type crystal structure and rare earth element hydride dispersively distributed in a matrix having a CaCu.sub.5 -type crystal structure and, wherein the amount of said phase having a Ce.sub.2 Ni.sub.7 -type crystal structure is 1-40% by area and the amount of said rare earth element hydride is 0.5-20% by area.Type: GrantFiled: June 16, 1999Date of Patent: July 4, 2000Assignee: Mitsubishi Materials CorporationInventors: Kouichi Kita, Katsuo Sugahara, Masahiro Wada, Takuya Murai, Takeshi Isobe