Patents by Inventor Hiroki Yoshizawa
Hiroki Yoshizawa 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: 11673194Abstract: A slidable component including a wear-resistant coating includes a slidable component, and a wear-resistant coating provided on a slide surface of the slidable component. The wear-resistant coating includes metal particles deposited on the side surface of the slidable component, and containing Ni, Co and Cr, and a first oxide layer covering surfaces of the metal particles, containing an Al oxide as its main component, and containing a Y oxide.Type: GrantFiled: April 10, 2019Date of Patent: June 13, 2023Assignee: IHI CorporationInventors: Hiroki Yoshizawa, Mitsutoshi Watanabe, Yukihiro Shimoda
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Publication number: 20220235469Abstract: A sliding component having a wear-resistant coating includes a sliding component formed of a Ni alloy, and a wear-resistant coating provided on a sliding surface of the sliding component. The wear-resistant coating has, at least on the surface side thereof, an Al-containing Co alloy layer which contains Co as a main component, at least one of W, Ni, Mo, Fe, Si, and C, Cr, and 0.3% by mass or more and 26% by mass or less of Al.Type: ApplicationFiled: April 11, 2022Publication date: July 28, 2022Applicant: IHI CorporationInventors: Hiroki YOSHIZAWA, Mitsutoshi WATANABE, Kenta KAWAHARA
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Publication number: 20210210996Abstract: A method of manufacturing an Sm—Fe—N magnet includes a sealing step of filling a metal sheath with a magnet powder including an Sm—Fe—N compound as a main component and sealing the metal sheath, a Magnetic field applying step of applying a magnetic field to the magnet powder sealed in the metal sheath, and magnetizing the magnet powder by magnetically orienting the magnet powder and aligning a direction of magnetic orientation in one direction, a preliminary rolling step of preliminarily rolling the magnetically oriented magnet powder sealed in the metal sheath to make the magnetically oriented magnet powder into a green compact, and a pressurizing step of pressurizing the green compact sealed in the metal sheath and densifying the green compact to form a magnet body, wherein in the preliminary rolling step, the preliminary rolling is performed by lightly rolling the magnetically oriented magnet powder sealed in the metal sheath with a pressure smaller than a pressure in the pressurizing step.Type: ApplicationFiled: March 23, 2021Publication date: July 8, 2021Applicant: IHI CorporationInventors: Haruki EGUCHI, Akihiro NOMURA, Natsuki YONEYAMA, Hiroo TAKAHASHI, Osamu HARASAKI, Hiroki YOSHIZAWA, Isao NAKANOWATARI
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Patent number: 10894387Abstract: A sliding part with a wear resistant coating includes a sliding part, and a wear resistant coating provided on a sliding surface of the sliding part, and made of a cobalt alloy containing chromium and silicon. In the wear resistant coating, oxide particles are dispersed which include an oxide containing chromium and silicon, and have a particle size of 100 ?m or less when a cross section of the wear resistant coating is observed using an optical microscope with a magnification of 100 times.Type: GrantFiled: February 12, 2018Date of Patent: January 19, 2021Assignee: IHI CorporationInventors: Hiroki Yoshizawa, Mitsutoshi Watanabe, Yukihiro Shimoda
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Publication number: 20190233949Abstract: A slidable component including a wear-resistant coating includes a slidable component, and a wear-resistant coating provided on a slide surface of the slidable component. The wear-resistant coating includes metal particles deposited on the side surface of the slidable component, and containing Ni, Co and Cr, and a first oxide layer covering surfaces of the metal particles, containing an Al oxide as its main component, and containing a Y oxide.Type: ApplicationFiled: April 10, 2019Publication date: August 1, 2019Applicant: IHI CorporationInventors: Hiroki YOSHIZAWA, Mitsutoshi Watanabe, Yukihiro Shimoda
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Patent number: 10358700Abstract: A thermal barrier-coated Ni alloy component includes: a substrate made of a Ni alloy containing Al; an intermediate layer formed on a surface of the substrate; and a thermal barrier layer made of a ceramic and formed on a surface of the intermediate layer. The intermediate layer includes a ?? layer, which is formed from a ??-Ni3Al phase on the surface on the thermal barrier layer side, and contains Pt.Type: GrantFiled: February 24, 2016Date of Patent: July 23, 2019Assignees: IHI CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Hiroki Yoshizawa, Akira Tateno, Akihiro Sato, Kota Sasaki, Masato Ishida, Yoshito Yasui, Hideyuki Murakami, Hiromichi Murakami
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Publication number: 20180170004Abstract: A sliding part with a wear resistant coating includes a sliding part, and a wear resistant coating provided on a sliding surface of the sliding part, and made of a cobalt alloy containing chromium and silicon. In the wear resistant coating, oxide particles are dispersed which include an oxide containing chromium and silicon, and have a particle size of 100 ?m or less when a cross section of the wear resistant coating is observed using an optical microscope with a magnification of 100 times.Type: ApplicationFiled: February 12, 2018Publication date: June 21, 2018Applicant: IHI CorporationInventors: Hiroki Yoshizawa, Mitsutoshi Watanabe, Yukihiro Shimoda
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Patent number: 9478325Abstract: Employing a compact molded from powder of metal or the like as an electrode 11, generating pulsed discharges between the electrode 11 and a treating portion Wa of work W in working oil L as a mixture with powder of semiconductor or conductor mixed therein, using discharge energy thereof for locally fusing surface regions of the treating portion Wa of work W, showering molten pieces of electrode material or reactants of the electrode material onto the treating portion Wa of work W, forming a covering film C on the treating portion Wa of work W.Type: GrantFiled: February 8, 2013Date of Patent: October 25, 2016Assignee: IHI CORPORATIONInventors: Mitsutoshi Watanabe, Hiroyuki Ochiai, Hiroki Yoshizawa, Yukihiro Shimoda, Masayoshi Shiino
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Patent number: 9410250Abstract: A discharge surface treatment electrode used in discharge surface treatment for forming a wear-resistant film on a treatment target surface of a workpiece by use of the discharge energy of electric discharges caused between the electrode and the workpiece, the film being made of a material of an electrode or a substance obtained by a reaction of the material of the electrode with the discharge energy. The discharge surface treatment electrode is formed by: compression-molding a mixed powder into a green compact, the mixed powder being formed from a powder of a Stellite alloy with an average particle size of 3 ?m or less prepared by use of a jet mill and a powder of a metal with an average particle size of 3 ?m or less manufactured through an atomization process or a chemical process; and subjecting the green compact to heat treatment.Type: GrantFiled: April 13, 2010Date of Patent: August 9, 2016Assignee: IHI CorporationInventors: Hiroki Yoshizawa, Satoshi Kurita, Mitsutoshi Watanabe, Kyouhei Nomura, Yukihiro Shimoda, Nobuhiko Yunoki, Masanobu Hasegawa
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Publication number: 20160221081Abstract: In a method for jointing metal injection molded parts, [1] at least two metal injection molded parts each of which is injection-molded from mixtures of metal powders and binders are contacted with each other, [2] paste agents containing nitrogen or chlorine are pasted on a jointed portion at which the at least two metal injection molded parts are contacted with each other, and [3] the at least two metal injection molded parts are jointed at the jointed portion by degreasing or sintering, and thereby a metal product is manufactured. According to the jointing method, jointing strength of the jointed portion can be improved.Type: ApplicationFiled: April 7, 2016Publication date: August 4, 2016Applicant: IHI CorporationInventors: Hiroki Yoshizawa, Shigeyuki Satoh, Nobuyasu Tsuno, Natsuki Yoneyama, Shuji Ikeda, Takashi Yoshinouchi, Masayuki Satake
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Publication number: 20160168661Abstract: A thermal barrier-coated Ni alloy component includes: a substrate made of a Ni alloy containing Al; an intermediate layer formed on a surface of the substrate; and a thermal barrier layer made of a ceramic and formed on a surface of the intermediate layer. The intermediate layer includes a ?? layer, which is formed from a ??-Ni3Al phase on the surface on the thermal barrier layer side, and contains Pt.Type: ApplicationFiled: February 24, 2016Publication date: June 16, 2016Applicants: IHI Corporation, NATIONAL INSTITUTE FOR MATERIALS SCIENCEInventors: Hiroki YOSHIZAWA, Akira Tateno, Akihiro Sato, Kota Sasaki, Masato Ishida, Yoshito Yasui, Hideyuki Murakami, Hiromichi Murakami
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Patent number: 9234295Abstract: The method of forming an oxidation resistant coating layer is for forming an oxidation resistant coating layer containing aluminum on a surface layer of a member (A) formed of metallic material. The method includes a plating treatment step (S1) of plating aluminum on a surface of the member (A) in a solvent, and a heat treatment step (S2) of heat-treating the member (A) whose surface has been plated by the plating treatment step (S1).Type: GrantFiled: March 23, 2011Date of Patent: January 12, 2016Assignee: IHI CORPORATIONInventors: Akihiro Sato, Yoshihiro Tsuda, Hiroaki Iwata, Akira Tateno, Hiroki Yoshizawa, Tetsuji Hirato
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Patent number: 8993917Abstract: A forming 7 die is filled with a powder (11) of electrode material, the powder (11) of electrode material filled in the forming die is compressed to form a porous powder compact (27), the porous powder compact (27) is set in place in a chamber (25) of a heat-treating furnace (23), the chamber (25) is supplied with inert gas or hydrogen gas, and inert gas or hydrogen gas is heated by heaters (39) in the heat-treating furnace (23) and blown toward the powder compact (27), as blows circulating in the chamber (25), whereby the powder compact is heated with heat of convection flows of inert gas or hydrogen gas, or mixed gas containing inert gas as principal component and hydrogen gas, so the electrode material of the powder compact is sintered.Type: GrantFiled: July 16, 2008Date of Patent: March 31, 2015Assignee: IHI CorporationInventors: Masayoshi Shiino, Hiroyuki Ochiai, Mitsutoshi Watanabe, Hiroki Yoshizawa, Issei Otera
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Patent number: 8776382Abstract: A cutting instrument has a cutting blade portion formed with a skin made of an electrode material or a reaction product of the electrode material, the electrode material having been molten by pulse discharges induced between the cutting blade portion and an electrode in a machining liquid or gas, having as the electrode one of a mold molded from powder of a kind or powder of a mixture of kinds out of a metal or metals, a metal compound or metal compounds, and a ceramic or ceramics, and a heat-treated mold being the mold as heat-treated.Type: GrantFiled: October 2, 2008Date of Patent: July 15, 2014Assignee: IHI CorporationInventors: Hiroyuki Ochiai, Mitsutoshi Watanabe, Takashi Furukawa, Hiroki Yoshizawa, Yukihiro Shimoda, Sadao Doi
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Publication number: 20140170794Abstract: A metal mixture is prepared, in which an excess amount of Te is added to a (Bi—Sb)2Te3 based composition. After melting the metal mixture, the molten metal is solidified on a surface of a cooling roll of which the circumferential velocity is no higher than 5 m/sec, so as to have a thickness of no less than 30 ?m. Thus, a plate shaped raw thermoelectric semiconductor materials 10 are manufactured, in which Te rich phases are microscopically dispersed in complex compound semiconductor phases, and extending directions of C face of most of crystal grains are uniformly oriented. The raw thermoelectric semiconductor materials 10 are layered in the direction of the plate thickness. And the layered body is solidified and formed to form a compact 12. After that, the compact 12 is plastically deformed in such a manner that a shear force is applied in a uniaxial direction that is approximately parallel to the main layering direction of the raw thermoelectric semiconductor materials 10.Type: ApplicationFiled: February 24, 2014Publication date: June 19, 2014Applicant: IHI CorporationInventors: Toshinori OTA, Hiroki Yoshizawa, Kouiti FUJITA, Isao IMAI, Tsuyoshi TOSHO, Ujihiro NISHIIKE
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Patent number: 8692103Abstract: A metal mixture is prepared, in which an excess amount of Te is added to a (Bi—Sb)2Te3 based composition. After melting the metal mixture, the molten metal is solidified on a surface of a cooling roll of which the circumferential velocity is no higher than 5 m/sec, so as to have a thickness of no less than 30 ?m. Thus, a plate shaped raw thermoelectric semiconductor materials 10 are manufactured, in which Te rich phases are microscopically dispersed in complex compound semiconductor phases, and extending directions of C face of most of crystal grains are uniformly oriented. The raw thermoelectric semiconductor materials 10 are layered in the direction of the plate thickness. And the layered body is solidified and formed to form a compact 12. After that, the compact 12 is plastically deformed in such a manner that a shear force is applied in a uniaxial direction that is approximately parallel to the main layering direction of the raw thermoelectric semiconductor materials 10.Type: GrantFiled: April 11, 2011Date of Patent: April 8, 2014Assignee: IHI CorporationInventors: Toshinori Ota, Hiroki Yoshizawa, Kouiti Fujita, Isao Imai, Tsuyoshi Tosho, Ujihiro Nishiike
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Publication number: 20130146822Abstract: Employing a compact molded from powder of metal or the like as an electrode 11, generating pulsed discharges between the electrode 11 and a treating portion Wa of work W in working oil L as a mixture with powder of semiconductor or conductor mixed therein, using discharge energy thereof for locally fusing surface regions of the treating portion Wa of work W, showering molten pieces of electrode material or reactants of the electrode material onto the treating portion Wa of work W, forming a covering film C on the treating portion Wa of work W.Type: ApplicationFiled: February 8, 2013Publication date: June 13, 2013Inventors: Mitsutoshi WATANABE, Hiroyuki OCHIAI, Hiroki YOSHIZAWA, Yukihiro SHIMODA, Masayoshi SHIINO
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Publication number: 20130037524Abstract: An electrode applicable to discharge surface treatment is produced. This method is comprised of: kneading a composition including an electrically conductive mixed matter including a first powder obtained by at least any process selected from the group consisting of an atomizing method, a reduction method, and a carbonyl method and a second powder obtained by a crushing method, and a binder, the electrically conductive mixed matter including the second powder at a ratio of 10-65 weight %; injecting the kneaded composition into a mold to produce a green body; heating the green body so as to remove the binder from the green body; and sintering the green body excepting the binder.Type: ApplicationFiled: April 27, 2011Publication date: February 14, 2013Applicant: IHI CorporationInventors: Hiroki Yoshizawa, Mitsutoshi Watanabe, Hiroyuki Ochiai, Yukihiro Shimoda, Kyouhei Nomura, Keiji Kubushiro
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Publication number: 20130008799Abstract: The method of forming an oxidation resistant coating layer is for forming an oxidation resistant coating layer containing aluminum on a surface layer of a member (A) formed of metallic material. The method includes a plating treatment step (S1) of plating aluminum on a surface of the member (A) in a solvent, and a heat treatment step (S2) of heat-treating the member (A) whose surface has been plated by the plating treatment step (S1).Type: ApplicationFiled: March 23, 2011Publication date: January 10, 2013Inventors: Akihiro Sato, Yoshihiro Tsuda, Hiroaki Iwata, Akira Tateno, Hiroki Yoshizawa, Tetsuji Hirato
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Patent number: 8316920Abstract: A metal strip casting apparatus and method of casting metal strip include assembling a pair of counter-rotatable casting rolls positioned laterally forming a nip between for casting, and assembling a pair of brush rolls, each of the brush rolls associated with one of each of the casting rolls. Each brush roll includes at least one spaced apart brush line extending substantially along the axial length of the casting roll. The brush lines may form a spiral, zigzag, wave or crisscross array about the brush roll. The brush roll may include one or more staggered rings with regularly or irregularly spaced apart bristles which form the brush lines. The brush lines may be between 10 to 50 mm apart and separated by between 2 mm to 45 mm of open space. The brush lines may be one line per 10 mm to 90 mm of axial length of brush roll.Type: GrantFiled: November 20, 2009Date of Patent: November 27, 2012Assignee: Nucor CorporationInventors: Hiroyuki Otsuka, Hiroki Yoshizawa, Katsumi Nakayama, Kazuo Miyoshi