Patents by Inventor Toshihiro Uehara
Toshihiro Uehara 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: 11970396Abstract: A negative thermal expansion material having a negative thermal expansion coefficient according to the present invention is represented by Zr2?aMaSxP2O12+?, where M is at least one selected from Ti, Ce, Sn, Mn, Hf, Ir, Pb, Pd, and Cr; a is 0?a<2; x is 0.4?x?1; and ? is a value defined as to satisfy a charge neutral condition. The present invention makes it possible to provide a negative thermal expansion material, a composite material and a method for producing a negative thermal expansion material that can realize reduction in cost and density reduction.Type: GrantFiled: February 26, 2019Date of Patent: April 30, 2024Assignees: TOKYO INSTITUTE OF TECHNOLOGY, MITSUI MINING & SMELTING CO., LTD.Inventors: Toshihiro Isobe, Yuko Hayakawa, Yuri Adachi, Ryosuke Uehara
-
Publication number: 20240043948Abstract: A method for manufacturing an austenitic stainless steel strip comprises: hot-rolling a material having a component composition containing, in % by mass, more than 20.0% and 30.0% or less of Ni, more than 15.0% and 18.0% or less of Cr, 1.0 to 2.0% of Mo, 3.5% or more and less than 5.0% of Al, more than 1.0% and 2.0% or less of Nb+Ta, 0.3% or less of Ti+V, 1.0% or less of Si, 2.0% or less of Mn, 0.01 to 0.3% of Zr, 0.005 to 0.045% of C, 0.001 to 0.03% of B, and also containing at least one element selected from Y, La, Ce and Hf in an amount such that the content of Y+La+Ce+Hf+Zr can become 0.01 to 0.5% with the remainder comprising Fe and unavoidable impurities; cold-rolling the strip; and heating the strip, then maintaining the strip at that temperature, and rapid-cooling the strip.Type: ApplicationFiled: June 17, 2021Publication date: February 8, 2024Applicant: Proterial, Ltd.Inventors: Shogo Momono, Shinichiro Fukada, Toshihiro Uehara
-
Patent number: 11890665Abstract: Provided is a metal gasket including, expressed in mass%, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.04% or less (including 0%), S: 0.01% or less (including 0%), Ni: 25.0-60.0%, Cr: 10.0-20.0%, either Mo or W alone, or both Mo+W/2: 0.05-5.0%, Al: more than 0.8% to 3.0% or less, Ti: 1.5-4.0%, Nb: 0.05-2.5%, V: 1.0% or less (including 0%), B: 0.001-0.015%, Mg: 0.0005-0.01%, S/Mg: 1.0 or less, N: 0.01% or less (including 0%), and O: 0.005% or less (including 0%), with the remainder being Fe and unavoidable impurities. The metal gasket has a metal structure in which a precipitate ?? phase having an average equivalent circle diameter of 25 nm or larger is not present within the austenite base.Type: GrantFiled: August 25, 2022Date of Patent: February 6, 2024Assignee: PROTERIAL, LTD.Inventors: Toshihiro Uehara, Junichi Nishida
-
Publication number: 20230166318Abstract: Provided is a metal gasket including, expressed in mass%, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.04% or less (including 0%), S: 0.01% or less (including 0%), Ni: 25.0-60.0%, Cr: 10.0-20.0%, either Mo or W alone, or both Mo + W/2: 0.05-5.0%, Al: more than 0.8% to 3.0% or less, Ti: 1.5-4.0%, Nb: 0.05-2.5%, V: 1.0% or less (including 0%), B: 0.001-0.015%, Mg: 0.0005-0.01%, S/Mg: 1.0 or less, N: 0.01% or less (including 0%), and O: 0.005% or less (including 0%), with the remainder being Fe and unavoidable impurities. The metal gasket has a metal structure in which a precipitate ?? phase having an average equivalent circle diameter of 25 nm or larger is not present within the austenite base.Type: ApplicationFiled: August 25, 2022Publication date: June 1, 2023Applicant: HITACHI METALS, LTD.Inventors: Toshihiro UEHARA, Junichi NISHIDA
-
Patent number: 11471929Abstract: Provided is a metal gasket including, expressed in mass %, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.04% or less (including 0%), S: 0.01% or less (including 0%), Ni: 25.0-60.0%, Cr: 10.0-20.0%, either Mo or W alone, or both Mo+W/2:0.05-5.0%, Al: more than 0.8% to 3.0% or less, Ti: 1.5-4.0%, Nb: 0.05-2.5%, V: 1.0% or less (including 0%), B: 0.001-0.015%, Mg: 0.0005-0.01%, S/Mg: 1.0 or less, N: 0.01% or less (including 0%), and O: 0.005%) or less (including 0%), with the remainder being Fe and unavoidable impurities. The metal gasket has a metal structure in which a precipitate ?? phase having an average equivalent circle diameter of 25 nm or larger is not present within the austenite base.Type: GrantFiled: December 15, 2016Date of Patent: October 18, 2022Assignee: HITACHI METALS, LTD.Inventors: Toshihiro Uehara, Junichi Nishida
-
Patent number: 11208707Abstract: The present invention provides a Ni-based alloy that is hot-workable and exhibits an excellent high-temperature strength, and provides a heat-resistant plate material using the same. This Ni-based alloy is composed of, by mass, C: 0.002 to 0.10%, Si: less than 1.0%, Mn: up to 1.0%, P: up to 0.04% (including 0%), S: up to 0.01% (including 0%), Cr: 15.0 to 25.0%, Co: 0.1 to 18.0%, Mo: not less than 2.0% and less than 4.0%, Al: 3.0 to 5.0%, Ti: not less than 0.01% and less than 0.5%, Zr: 0.01 to 0.1%, B: 0.001 to 0.015%, Fe: up to 3.0%, Mg or Mg+0.6×Ca: 0.0005 to 0.01%, N: up to 0.01% (including 0%), O: up to 0.005% (including 0%), and the balance of Ni with inevitable impurities, S/Mg or S/(Mg+0.6×Ca) being up to 1.0, and a G value represented by the following formula (1) being 30 to 45. G=7+0.11Cr+8.23Al+4.66Ti?0.Type: GrantFiled: March 20, 2019Date of Patent: December 28, 2021Assignee: HITACHI METALS, LTD.Inventors: Toshihiro Uehara, Shogo Momono
-
Patent number: 10995384Abstract: There is provided a steel for solid oxide fuel cells which contains more than 0 and not more than 0.05 mass % of C, 0.05 mass % or less of N, 0.01 mass % or less of O, 0.2 mass % or less of Al, 0.15 mass % or less of Si, 0.1 to 1.0 mass % of Mn, 20.0 to 25.0 mass % of Cr, more than 0 mass % and not more than 1.0 mass % of Ni, 0.02 to 0.12 mass % of La, 0.1 to 0.5 mass % of Zr, 0.15 to 0.5 mass % of La+Zr, and Fe and impurities as a remainder. The following relational formula is satisfied, and an Fe and Zr-containing intermetallic compound viewed in a ferrite matrix is 1.1 % or less in terms of a visual field area ratio 5(7C+6N)/(7?4(7C+6N))?Zr?41(7C+6N)/(7+66(7C+6N)).Type: GrantFiled: September 30, 2015Date of Patent: May 4, 2021Assignee: HITACHI METALS, LTD.Inventors: Kazuhiro Yamamura, Toshihiro Uehara, Shigenori Tanaka
-
Publication number: 20210115537Abstract: The present invention provides a Ni-based alloy that is hot-workable and exhibits an excellent high-temperature strength, and provides a heat-resistant plate material using the same. This Ni-based alloy is composed of, by mass, C: 0.002 to 0.10%, Si: less than 1.0%, Mn: up to 1.0%, P: up to 0.04% (including 0%), S: up to 0.01% (including 0%), Cr: 15.0 to 25.0%, Co: 0.1 to 18.0%, Mo: not less than 2.0% and less than 4.0%, Al: 3.0 to 5.0%, Ti: not less than 0.01% and less than 0.5%, Zr: 0.01 to 0.1%, B: 0.001 to 0.015%, Fe: up to 3.0%, Mg or Mg+0.6×Ca: 0.0005 to 0.01%, N: up to 0.01% (including 0%), O: up to 0.005% (including 0%), and the balance of Ni with inevitable impurities, S/Mg or S/(Mg+0.6×Ca) being up to 1.0, and a G value represented by the following formula (1) being 30 to 45. G=7+0.11Cr+8.23Al+4.66Ti-0.Type: ApplicationFiled: March 20, 2019Publication date: April 22, 2021Applicant: Hitachi Metals, Ltd.Inventors: Toshihiro UEHARA, Shogo MOMONO
-
Patent number: 10633717Abstract: A low thermal expansion superalloy is composed of, in mass %, 0.1% or less of C, 0.1-1.0% of Si, 1.0% or less of Mn, 25-32% of Ni, more than 18% but less than 24% of Co, more than 0.25% but 1.0% or less of Al, 0.5-1.5% of Ti, more than 2.1% but less than 3.0% of Nb, 0.001-0.01% of B and 0.0005-0.01% of Mg, with the balance of Fe and unavoidable impurities, while satisfying Mg/S?1, 52.9?1.235Ni+Co<55.8%, (Al+Ti+Nb) is 3.5-5.5%, and the F value is 8% or less. In the superalloy, a granular intermetallic compound containing Si, Nb, and Ni alone or in a total amount of 36 mass % or more is precipitated at a grain boundary of an austenite matrix, and an intermetallic compound including a larger concentration of Ni, Al, Ti, and Nb and having 50 nm or smaller of an average diameter is precipitated in the austenite matrix.Type: GrantFiled: July 29, 2016Date of Patent: April 28, 2020Assignee: HITACHI METALS, LTD.Inventors: Toshihiro Uehara, Naoya Sato
-
Publication number: 20190211429Abstract: A martensitic stainless steel for a fuel injection member contains, in mass %, at least 0.35% and less than 0.50% of C, more than 0.20% and at most 0.40% of Si, 0.2-0.4% of Mn, 0.25% or less of Ni, 15.0-17.0% of Cr, more than 2.0% and at most 3.0% of Mo, 0.1-0.3% of W, 0.001-0.003% of B, and at least 0.15% and less than 0.20% of N, with the remainder comprising Fe and inevitable impurities, which include 0-0.025% of P, 0-0.005% of S, 0-0.2% of Cu, 0-0.05% of Al, 0-0.02% of Ti, 0-0.02% of Nb, 0-0.15% of V, 0-0.003% of O, and 0-0.001% of H.Type: ApplicationFiled: July 5, 2017Publication date: July 11, 2019Applicant: Hitachi Metals, Ltd.Inventors: Toshihiro UEHARA, Akihiro TOJI
-
Publication number: 20190048433Abstract: A low thermal expansion superalloy is composed of, in mass %, 0.1% or less of C, 0.1-1.0% of Si, 1.0% or less of Mn, 25-32% of Ni, more than 18% but less than 24% of Co, more than 0.25% but 1.0% or less of Al, 0.5-1.5% of Ti, more than 2.1% but less than 3.0% of Nb, 0.001-0.01% of B and 0.0005-0.01% of Mg, with the balance of Fe and unavoidable impurities, while satisfying Mg/S?1, 52.9?1.235Ni+Co<55.8%, (Al+Ti+Nb) is 3.5-5.5%, and the F value is 8% or less. In the superalloy, a granular intermetallic compound containing Si, Nb, and Ni alone or in a total amount of 36 mass % or more is precipitated at a grain boundary of an austenite matrix, and an intermetallic compound including a larger concentration of Ni, Al, Ti, and Nb and having 50 nm or smaller of an average diameter is precipitated in the austenite matrix.Type: ApplicationFiled: July 29, 2016Publication date: February 14, 2019Applicant: HITACHI METALS, LTD.Inventors: Toshihiro UEHARA, Naoya SATO
-
Publication number: 20180354019Abstract: Provided is a metal gasket including, expressed in mass %, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.04% or less (including 0%), S: 0.01% or less (including 0%), Ni: 25.0-60.0%, Cr: 10.0-20.0%, either Mo or W alone, or both Mo+W/2:0.05-5.0%, Al: more than 0.8% to 3.0% or less, Ti: 1.5-4.0%, Nb: 0.05-2.5%, V: 1.0% or less (including 0%), B: 0.001-0.015%, Mg: 0.0005-0.01%, S/Mg: 1.0 or less, N: 0.01% or less (including 0%), and O: 0.005%) or less (including 0%), with the remainder being Fe and unavoidable impurities. The metal gasket has a metal structure in which a precipitate ?? phase having an average equivalent circle diameter of 25 nm or larger is not present within the austenite base.Type: ApplicationFiled: December 15, 2016Publication date: December 13, 2018Applicant: HITACHI METALS, LTD.Inventors: Toshihiro UEHARA, Junichi NISHIDA
-
Patent number: 9863019Abstract: A high-strength Ni-base alloy having favorable corrosion resistance, high strength, and high ductility, around room temperature is provided. A high-strength Ni-base alloy includes: in % by mass, less than 0.01% of C, not more than 0.5% of Si, not more than 0.5% of Mn, 15 to 25% of Cr. 1.0 to 5.0% of Mo or Mo+0.5W, 0.2 to 0.8% of Al, 1.0 to 2.0% of Ti, 3.00 to 3.80% of Nb, not more than 30% of Fe, and 0.0007 to 0.010% of Mg; Ni; and impurities. A value represented by Mg/S is not less than 0.7, and an A value is not less than 0.015 and less than 0.027, the A value being represented by A value=Al/(Al+1.77(Ti?1.36C)+3.44(Nb?5.1C)).Type: GrantFiled: July 1, 2015Date of Patent: January 9, 2018Assignee: HITACHI METALS, LTD.Inventors: Toshihiro Uehara, Chuya Aoki
-
Patent number: 9783872Abstract: An electrode material for at least one of a center electrode (5) and a ground electrode (27) provided with a chip (31, 32) for use in a spark plug (1). The electrode material contains Ni as a principal component, and has a Si content of from 0.50% to 1.0% by mass, an Al content of from 0.2% to 2.0% by mass, a Cr content of from 12% to 34% by mass, a rare-earth element or the like content of from 0.03% to 0.2% by mass, a Fe content of more than 0% but not more than 20% by mass, a C content of not more than 0.10% by mass, and a Mn content of not more than 1.0% by mass. The total content of Si and Al is not less than 0.80% by mass, and less than one tenth of the Cr content.Type: GrantFiled: January 8, 2014Date of Patent: October 10, 2017Assignees: NGK SPARK PLUG CO., LTD., HITACHI METALS, LTD.Inventors: Osamu Yoshimoto, Tomonori Kanemaru, Takehito Kuno, Tomo-o Tanaka, Toshihiro Uehara
-
Publication number: 20170275728Abstract: There is provided a steel for solid oxide fuel cells which contains Zr and has a composition balance which allows a thin plate to stably obtain excellent oxidation resistance. The steel for solid oxide fuel cells contains more than 0 and not more than 0.05 mass % of C, 0.05 mass % or less of N, 0.01 mass % or less of O, 0.2 mass % or less of Al, 0.15 mass % or less of Si, 0.1 to 1.0 mass % of Mn, 20.0 to 25.0 mass % of Cr, more than 0 mass % and not more than 1.0 mass % of Ni, 0.02 to 0.12 mass % of La, 0.1 to 0.5 mass % of Zr, 0.15 to 0.5 mass % of La+Zr, and Fe and impurities as a remainder. The following relational formula is satisfied, and an Fe and Zr-containing intermetallic compound viewed in a ferrite matrix is 1.1 mass % or less in terms of a visual field area ratio.Type: ApplicationFiled: September 30, 2015Publication date: September 28, 2017Applicant: Hitachi Metals, Ltd.Inventors: Kazuhiro YAMAMURA, Toshihiro UEHARA, Shigenori TANAKA
-
Publication number: 20160068932Abstract: A high-strength Ni-base alloy having favorable corrosion resistance, high strength, and high ductility, around room temperature is provided. A high-strength Ni-base alloy includes: in % by mass, less than 0.01% of C, not more than 0.5% of Si, not more than 0.5% of Mn, 15 to 25% of Cr. 1.0 to 5.0% of Mo or Mo+0.5W, 0.2 to 0.8% of Al, 1.0 to 2.0% of Ti, 3.00 to 3.80% of Nb, not more than 30% of Fe, and 0.0007 to 0.010% of Mg; Ni; and impurities. A value represented by Mg/S is not less than 0.7, and an A value is not less than 0.015 and less than 0.027, the A value being represented by A value=Al/(Al+1.77(Ti?1.36C)+3.44(Nb?5.1C)).Type: ApplicationFiled: July 1, 2015Publication date: March 10, 2016Inventors: Toshihiro UEHARA, Chuya AOKI
-
Publication number: 20150340844Abstract: An electrode material for at least one of a center electrode (5) and a ground electrode (27) provided with a chip (31, 32) for use in a spark plug (1). The electrode material contains Ni as a principal component, and has a Si content of from 0.50% to 1.0% by mass, an Al content of from 0.2% to 2.0% by mass, a Cr content of from 12% to 34% by mass, a rare-earth element or the like content of from 0.03% to 0.2% by mass, a Fe content of more than 0% but not more than 20% by mass, a C content of not more than 0.10% by mass, and a Mn content of not more than 1.0% by mass. The total content of Si and Al is not less than 0.80% by mass, and less than one tenth of the Cr content.Type: ApplicationFiled: January 8, 2014Publication date: November 26, 2015Applicants: NGK SPARK PLUG CO., LTD., HITACHI METALS, LTD.Inventors: Osamu YOSHIMOTO, Tomonori KANEMARU, Takehito KUNO, Tomo-o TANAKA, Toshihiro UEHARA
-
Patent number: 9065084Abstract: Disclosed is steel for a solid oxide fuel cell, which has excellent oxidation resistance, reduces Cr evaporation, has good electrical conductivity and has a thermal expansion coefficient similar to that of a ceramic component such as an electrolyte or an electrode. Specifically disclosed is steel for solid oxide fuel cells, which has excellent oxidation resistance and contains, in mass %, 0.1% or less of C, 0.2% or less of Al, 0.2% or less of Si, 0.4% or less of Mn, 16.0-28.0% of Cr, 1.5% or less of Ni, 1.0% or less of REM and/or Zr in total, 1.0-3.0% of W, and more than 0.2% but 4.0% or less of Cu, with the balance made up of Fe and unavoidable impurities.Type: GrantFiled: September 10, 2010Date of Patent: June 23, 2015Assignee: HITACHI METALS, LTD.Inventors: Nobutaka Yasuda, Toshihiro Uehara
-
Patent number: 8915226Abstract: An electrode material to be used for producing an earth electrode of a spark plug has a chemical composition of 0.3 to 3.0 mass % of Si, 0.01 to 0.3 mass % of one or more elements selected from the group consisting of Y and rare earth elements, not more than 0.5 mass % of Ti, not more than 1.2 mass % of Fe, and one or both of not more than 0.20 mass % of Ca and not more than 0.08 mass % of Mg. The electrode material further contains C, Mn, Cr, Al, N, S, a remainder Ni, and incidental impurities. In a total content of C, Mn, Cr, Al, N and S, C is not more than 0.1 mass %, Mn is less than 0.5 mass %, Cr is less than 0.5 mass %, Al is not more than 0.3 mass %, N is not more than 0.05 mass %, and S is not more than 0.03 mass %.Type: GrantFiled: February 24, 2012Date of Patent: December 23, 2014Assignees: Denso Corporation, Hitachi Metals, Ltd.Inventors: Taiji Yokoyama, Toshihiro Uehara
-
Patent number: 8845958Abstract: Provided is an Ni-base alloy excellent in strength, ductility and other properties through the resolution of micro-segregation. Also provided is a process for manufacturing an Ni-base alloy containing by mass C:0.15% or less, Si:1% or less, Mn:1% or less, Cr:10 to 24%, Mo+(1/2)W (where Mo may be contained either alone or as an essential component):5 to 17%, Al:0.5 to 1.8%, Ti:1 to 2.5%, Mg:0.02% or less, and either B:0.02% or less and/or Zr:0.2% or less at an Al/(Al+0.56Ti) ratio of 0.45 to 0.70 with the balance consisting of Ni and impurities, which comprises subjecting, at least one time, an Ni-base alloy material which is prepared by vacuum melting and has the above composition to homogenization heat treatment at 1160 to 1220° C. for 1 to 100 hours. The Mo segregation ratio of the alloy is controlled to 1 to 1.17 by the homogenization heat treatment.Type: GrantFiled: September 25, 2009Date of Patent: September 30, 2014Assignee: Hitachi Metals, Ltd.Inventors: Chuya Aoki, Toshihiro Uehara, Takehiro Ohno