Patents by Inventor Reiko Sugihara
Reiko Sugihara 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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Publication number: 20240072266Abstract: Disclosed is a component for solid oxide fuel cells that is excellent in both electrical conductivity and chromium poisoning resistance. As a substrate, a ferritic stainless steel having a chemical composition containing, in mass %, Cr: 14.0% to 32.0% and Al: 2.50% to 7.00% is used. Precious metal particles are coated on a surface of the substrate. The precious metal particles have: an average particle size of 1 ?m or more and 10 ?m or less; a coating thickness of 0.5 ?m or more and 10 ?m or less; and a surface coverage of 1.0% or more.Type: ApplicationFiled: August 31, 2022Publication date: February 29, 2024Applicants: JFE STEEL CORPORATION, TreadStone Technologies, Inc.Inventors: Muhammad FEBRY, Takayoshi YANO, Tetsuyuki NAKAMURA, Akito MIZUTANI, Masataka YOSHINO, Reiko SUGIHARA, Conghua WANG
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Publication number: 20230119504Abstract: Having a chemical composition (1) containing 0.15 mass % to 1.00 mass % of Nb, and (2) containing 0.0005 mass % to 0.0100 mass % of Mg, where (3) the Al content is controlled in a range of 0.55 mass % to 2.00 mass %, and (4) a relationship of 0.0004?[Mg]/[Al]?0.0050 is further satisfied.Type: ApplicationFiled: February 19, 2021Publication date: April 20, 2023Applicant: JFE STEEL CORPORATIONInventors: Muhammad FEBRY, Tetsuyuki NAKAMURA, Takayoshi YANO, Masataka YOSHINO, Reiko SUGIHARA
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Patent number: 11560604Abstract: Provided is a ferritic stainless steel in which cracking is unlikely to be caused in the vicinity of a weld zone by the stress due to expansion, contraction, and deformation due to the thermal effect of welding in the case of performing welding after deep drawing and which is excellent in corrosion resistance in the vicinity of the weld zone. The ferritic stainless steel has a composition containing C: 0.001% to 0.020%, Si: 0.01% to 0.30%, Mn: 0.01% to 0.50%, P: 0.04% or less, S: 0.01% or less, Cr: 18.0% to 24.0%, Ni: 0.01% to 0.40%, Mo: 0.30% to 3.0%, Al: 0.01% to 0.15%, Ti: 0.01% to 0.50%, Nb: 0.01% to 0.50%, V: 0.01% to 0.50%, Co: 0.01% to 6.00%, B: 0.0002% to 0.0050%, and N: 0.001% to 0.020% on a mass basis, the remainder being Fe and inevitable impurities. The composition satisfies 0.30%?Ti+Nb+V?0.60%.Type: GrantFiled: May 25, 2017Date of Patent: January 24, 2023Assignee: JFE STEEL CORPORATIONInventors: Tomohiro Ishii, Mitsuyuki Fujisawa, Reiko Sugihara, Chikara Kami
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Patent number: 11401595Abstract: A high-strength steel sheet having a TS of 780 MPa or more, excellent stretch flangeability, and excellent in-plane anisotropy of TS is provided. A high-strength steel sheet comprises: a predetermined chemical composition; a steel microstructure including, in area fraction, ferrite: 20% or more and 50% or less, lower bainite: 5% or more and 40% or less, martensite: 1% or more and 20% or less, and tempered martensite: 20% or less, and including, in volume fraction, retained austenite: 5% or more, the retained austenite having an average grain size of 2 ?m or less; and a texture having an inverse intensity ratio of ?-fiber to ?-fiber of 3.0 or less.Type: GrantFiled: August 29, 2017Date of Patent: August 2, 2022Assignee: JFE STEEL CORPORATIONInventors: Hidekazu Minami, Shinjiro Kaneko, Reiko Sugihara, Kazunori Tahara, Kazuma Mori
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Patent number: 11365467Abstract: Provided is a ferritic stainless steel having excellent brazability and excellent corrosion resistance to condensed water in an environment in which the ferritic stainless steel is used for an exhaust heat recovery device or an EGR cooler. The ferritic stainless steel has a composition containing, in mass %, C: 0.025% or less, Si: 0.01% or more and less than 0.40%, Mn: 0.05 to 1.5%, P: 0.05% or less, S: 0.01% or less, Cr: 17.0 to 30.0%, Mo: 1.10 to 3.0%, Ni: more than 0.80% and 3.0% or less, Nb: 0.20 to 0.80%, Al: 0.001 to 0.10%, and N: 0.025% or less, with the balance being Fe and incidental impurities, and satisfying the following expression (1) and expression (2): C+N?0.030%??(1) Cr+Mo?19.0%??(2) where C, N, Cr, and Mo in expression (1) and expression (2) represent the contents (mass %) of the corresponding elements.Type: GrantFiled: August 25, 2017Date of Patent: June 21, 2022Assignee: JFE STEEL CORPORATIONInventors: Manami Ichikawa, Tetsuyuki Nakamura, Kunio Fukuda, Shin Ishikawa, Reiko Sugihara
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Patent number: 11261512Abstract: Provided is ferritic stainless steel having excellent brazeability and excellent corrosion resistance to condensed water in an environment in which the steel is used for an exhaust heat recovery device or an EGR cooler. A ferritic stainless steel has a chemical composition containing, by mass %, C: 0.025% or less, Si: 0.40% to 2.0%, Mn: 0.05% to 1.5%, P: 0.05% or less, S: 0.01% or less, Cr: 16.0% to 30.0%, Mo: 0.60% to 3.0%, Ni: 0.10% to 2.5%, Nb: 0.20% to 0.80%, Al: 0.001% to 0.15%, N: 0.025% or less, and the balance being Fe and inevitable impurities, in which relational expressions (1) and (2) below are satisfied. C+N?0.030%??(1), 2Si+Ni?1.0%??(2), (in relational expressions (1) and (2), C, N, Si, and Ni each denote the contents (mass %) of the corresponding elements).Type: GrantFiled: August 25, 2017Date of Patent: March 1, 2022Assignee: JFE Steel CorporationInventors: Manami Ichikawa, Tetsuyuki Nakamura, Kunio Fukuda, Shin Ishikawa, Reiko Sugihara
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Patent number: 11230756Abstract: Provided is a ferritic stainless steel that has good corrosion resistance and which exhibits good brazeability when subjected to high-temperature brazing with a Ni-containing brazing filler metal. The ferritic stainless steel has a composition containing, in mass %, C: 0.003 to 0.020%, Si: 0.05 to 0.60%, Mn: 0.05 to 0.50%, P: 0.04% or less, S: 0.02% or less, Cr: 17.0 to 24.0%, Ni: 0.20 to 0.80%, Cu: 0.01 to 0.80%, Mo: 0.01 to 2.50%, Al: 0.001 to 0.015%, Nb: 0.25 to 0.60%, and N: 0.020% or less, with the balance being Fe and incidental impurities, the composition satisfying formula (1) below and formula (2) below, Cu+Mo?0.30??(1) 4Ni?(Si+Mn)?0??(2) (wherein Cu and Mo in formula (1) and Ni, Si, and Mn in formula (2) each represent the content (mass %) of the corresponding element).Type: GrantFiled: August 25, 2017Date of Patent: January 25, 2022Assignee: JFE Steel CorporationInventors: Takayoshi Yano, Kunio Fukuda, Shin Ishikawa, Katsuhisa Yamauchi, Reiko Sugihara, Hideya Matsumoto
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Publication number: 20210277494Abstract: Provided is a ferritic stainless steel in which cracking is unlikely to be caused in the vicinity of a weld zone by the stress due to expansion, contraction, and deformation due to the thermal effect of welding in the case of performing welding after deep drawing and which is excellent in corrosion resistance in the vicinity of the weld zone. The ferritic stainless steel has a composition containing C: 0.001% to 0.020%, Si: 0.01% to 0.30%, Mn: 0.01% to 0.50%, P: 0.04% or less, S: 0.01% or less, Cr: 18.0% to 24.0%, Ni: 0.01% to 0.40%, Mo: 0.30% to 3.0%, Al: 0.01% to 0.15%, Ti: 0.01% to 0.50%, Nb: 0.01% to 0.50%, V: 0.01% to 0.50%, Co: 0.01% to 6.00%, B: 0.0002% to 0.0050%, and N: 0.001% to 0.020% on a mass basis, the remainder being Fe and inevitable impurities. The composition satisfies 0.30%?Ti+Nb+V?0.60%.Type: ApplicationFiled: May 25, 2017Publication date: September 9, 2021Applicant: JFE Steel CorporationInventors: Tomohiro Ishii, Mitsuyuki Fujisawa, Reiko Sugihara, Chikara Kami
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Patent number: 11072837Abstract: A martensitic stainless steel sheet comprises a chemical composition containing, in mass %, C: 0.035% to 0.090%, Si: 0.01% to 1.0%, Mn: 0.01% to 0.90%, P: 0.050% or less, S: 0.050% or less, Cr: 10.0% to 14.0%, Ni: 0.01% to 0.40%, Al: 0.001% to 0.50%, V: 0.05% to 0.50%, and N: 0.050% to 0.20%, with the balance being Fe and inevitable impurities, wherein a content of C and a content of N in the chemical composition satisfy C %+N % 0.10% and N % C %, the number of precipitates with a major axis length of 200 nm or more in a surface layer of the martensitic stainless steel sheet is 25 or less per 100 ?m2, and the martensitic stainless steel sheet has a tensile strength of 1300 MPa or more, a proof stress of 1100 MPa or more, and an elongation of 8.0% or more.Type: GrantFiled: October 6, 2017Date of Patent: July 27, 2021Assignee: JFE STEEL CORPORATIONInventors: Tetsuyuki Nakamura, Shin Ishikawa, Reiko Sugihara
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Publication number: 20210102279Abstract: A ferritic stainless steel having good corrosion resistance and good brazability in the case where brazing is performed with a Ni-containing brazing filler metal at a high temperature. The ferritic stainless steel has a chemical composition comprising, by mass %, C: 0.003% to 0.020%, Si: 0.05% to 0.60%, Mn: 0.05% to 0.30%, P: 0.040% or less, S: 0.020% or less, Cr: 17.0% to 22.0%, Ni: 0.20% to 0.80%, Cu: 0.30% to 0.80%, Mo: 0.01% to 0.10%, Al: 0.001% to 0.015%, Nb: 0.25% to 0.60%, N: 0.020% or less, and the balance being Fe and inevitable impurities. The expression 4Ni?(Si+Mn)?0.00% is satisfied, where each of Ni, Si, and Mn denotes a content, by mass %, of a corresponding element.Type: ApplicationFiled: January 21, 2019Publication date: April 8, 2021Applicant: JFE STEEL CORPORATIONInventors: Takayoshi YANO, Manami ICHIKAWA, Tetsuyuki NAKAMURA, Kunio FUKUDA, Shin ISHIKAWA, Reiko SUGIHARA, Katsuhisa YAMAUCHI, Hideya MATSUMOTO
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Publication number: 20210032731Abstract: A ferritic stainless steel having excellent creep resistance and thermal fatigue resistance. The ferritic stainless steel has a chemical composition comprising, by mass %, C: 0.020% or less, Si: 0.1 to 1.0%, Mn: 0.05 to 0.60%, P: 0.050% or less, S: 0.008% or less, Ni: 0.02 to 0.60%, Al: 0.001 to 0.25%, Cr: 18.0 to 20.0%, Nb: 0.30 to 0.80%, Mo: 1.80 to 2.50%, N: 0.015% or less, Sb: 0.002 to 0.50%, and the balance being Fe and inevitable impurities. The expression Nb+Mo: 2.3 to 3.0% is satisfied, where Nb and Mo in the expression represent the contents, by mass %, of the respective elements.Type: ApplicationFiled: January 25, 2019Publication date: February 4, 2021Applicant: JFE STEEL CORPORATIONInventors: Tetsuyuki NAKAMURA, Shin ISHIKAWA, Reiko SUGIHARA
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Patent number: 10760142Abstract: Provided are a high-strength steel sheet and a method for manufacturing the steel sheet. The high-strength steel sheet has a specified chemical composition with the balance being Fe and inevitable impurities, a microstructure including, in terms of area ratio, 30% or more of a ferrite phase, 40% to 65% of a bainite phase and/or a martensite phase, and 5% or less of cementite, in which, in a surface layer that is a region within 50 ?m from the surface in the thickness direction, the area ratio of a ferrite phase is 40% to 55% and the total area ratio of a bainite phase having a grain diameter of more than 5 ?m and/or a martensite phase having a grain diameter of more than 5 ?m is 20% or less, and a tensile strength is 980 MPa or more.Type: GrantFiled: August 28, 2015Date of Patent: September 1, 2020Assignee: JFE Steel CorporationInventors: Nobusuke Kariya, Yoshihiko Ono, Yoshimasa Funakawa, Kazuma Mori, Reiko Sugihara, Kenji Kawamura
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Patent number: 10697039Abstract: Provided are a high-strength steel sheet and a method for manufacturing the steel sheet. The high-strength steel sheet has a specified chemical composition with the balance being Fe and inevitable impurities, a microstructure including, in terms of area ratio, 25% or less of a ferrite phase, 75% or more of a bainite phase and/or a martensite phase, and 5% or less of cementite, in which, in a surface layer that is a region within 50 ?m from the surface in the thickness direction, the area ratio of a ferrite phase is 5% to 20%, and a tensile strength is 1180 MPa or more.Type: GrantFiled: August 28, 2015Date of Patent: June 30, 2020Assignee: JFE Steel CorporationInventors: Nobusuke Kariya, Yoshihiko Ono, Yoshimasa Funakawa, Kazuma Mori, Reiko Sugihara, Kenji Kawamura
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Patent number: 10655201Abstract: A high-strength, cold-rolled steel sheet having a tensile strength of 980 MPa or more, the steel sheet having a chemical composition containing, by mass %, C: 0.070% to 0.100%, Si: 0.50% to 0.70%, Mn: 2.40% to 2.80%, P: 0.025% or less, S: 0.0020% or less, Al: 0.020% to 0.060%, N: 0.0050% or less, Nb: 0.010% to 0.060%, Ti: 0.010% to 0.030%, B: 0.0005% to 0.0030%, Sb: 0.005% to 0.015%, Ca: 0.0015% or less, Cr: 0.01% to 2.00%, Mo: 0.01% to 1.00%, Ni: 0.01% to 5.00%, Cu: 0.01% to 5.Type: GrantFiled: February 16, 2016Date of Patent: May 19, 2020Assignee: JFE STEEL CORPORATIONInventors: Nobusuke Kariya, Yoshihiko Ono, Yoshimasa Funakawa, Kazuma Mori, Reiko Sugihara
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Publication number: 20200080181Abstract: Provided is a ferritic stainless steel having excellent brazability and excellent corrosion resistance to condensed water in an environment in which the ferritic stainless steel is used for an exhaust heat recovery device or an EGR cooler. The ferritic stainless steel has a composition containing, in mass %, C: 0.025% or less, Si: 0.01% or more and less than 0.40%, Mn: 0.05 to 1.5%, P: 0.05% or less, S: 0.01% or less, Cr: 17.0 to 30.0%, Mo: 1.10 to 3.0%, Ni: more than 0.80% and 3.0% or less, Nb: 0.20 to 0.80%, Al: 0.001 to 0.10%, and N: 0.025% or less, with the balance being Fe and incidental impurities, and satisfying the following expression (1) and expression (2): C+N?0.030% ??(1) Cr+Mo?19.0% ??(2) where C, N, Cr, and Mo in expression (1) and expression (2) represent the contents (mass %) of the corresponding elements.Type: ApplicationFiled: August 25, 2017Publication date: March 12, 2020Applicant: JFE Steel CorporationInventors: Manami Ichikawa, Tetsuyuki Nakamura, Kunio Fukuda, Shin Ishikawa, Reiko Sugihara
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Publication number: 20190316236Abstract: Provided is a ferritic stainless steel sheet. The steel sheet has a chemical composition containing, by mass %, C: 0.010% or less, Si: 1.0% or less, Mn: 1.0% or less, P: 0.040% or less, S: 0.030% or less, Cr: 17.0% or more and 18.5% or less, N: 0.015% or less, Nb: 0.40% or more and 0.80% or less, Ti: 0.10% or more and 0.40% or less, Al: 0.20% or less, Ni: 0.05% or more and 0.40% or less, Co: 0.01% or more and 0.30% or less, Mo: 0.02% or more and 0.30% or less, Cu: 0.02% or more and 0.40% or less, and the balance being Fe and inevitable impurities, in which expression (1) below is satisfied. C %+N %: 0.018% or less??(1) In expression (1), C % and N % respectively denote the contents (mass %) of C and N.Type: ApplicationFiled: December 4, 2017Publication date: October 17, 2019Applicant: JFE Steel CorporationInventors: Tetsuyuki Nakamura, Shin Ishikawa, Reiko Sugihara
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Publication number: 20190264298Abstract: A martensitic stainless steel sheet comprises a chemical composition containing, in mass %, C: 0.035% to 0.090%, Si: 0.01% to 1.0%, Mn: 0.01% to 0.90%, P: 0.050% or less, S: 0.050% or less, Cr: 10.0% to 14.0%, Ni: 0.01% to 0.40%, Al: 0.001% to 0.50%, V: 0.05% to 0.50%, and N: 0.050% to 0.20%, with the balance being Fe and inevitable impurities, wherein a content of C and a content of N in the chemical composition satisfy C %+N % 0.10% and N % C %, the number of precipitates with a major axis length of 200 nm or more in a surface layer of the martensitic stainless steel sheet is 25 or less per 100 ?m2, and the martensitic stainless steel sheet has a tensile strength of 1300 MPa or more, a proof stress of 1100 MPa or more, and an elongation of 8.0% or more.Type: ApplicationFiled: October 6, 2017Publication date: August 29, 2019Applicant: JFE STEEL CORPORATIONInventors: Tetsuyuki NAKAMURA, Shin ISHIKAWA, Reiko SUGIHARA
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Publication number: 20190226067Abstract: A high-strength steel sheet having a TS of 780 MPa or more, excellent stretch flangeability, and excellent in-plane anisotropy of TS is provided. A high-strength steel sheet comprises: a predetermined chemical composition; a steel microstructure including, in area fraction, ferrite: 20% or more and 50% or less, lower bainite: 5% or more and 40% or less, martensite: 1% or more and 20% or less, and tempered martensite: 20% or less, and including, in volume fraction, retained austenite: 5% or more, the retained austenite having an average grain size of 2 ?m or less; and a texture having an inverse intensity ratio of ?-fiber to ?-fiber of 3.0 or less.Type: ApplicationFiled: August 29, 2017Publication date: July 25, 2019Applicant: JFE STEEL CORPORATIONInventors: Hidekazu MINAMI, Shinjiro KANEKO, Reiko SUGIHARA, Kazunori TAHARA, Kazuma MORI
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Publication number: 20190177824Abstract: Provided is ferritic stainless steel having excellent brazeability and excellent corrosion resistance to condensed water in an environment in which the steel is used for an exhaust heat recovery device or an EGR cooler. A ferritic stainless steel has a chemical composition containing, by mass %, C: 0.025% or less, Si: 0.40% to 2.0%, Mn: 0.05% to 1.5%, P: 0.05% or less, S: 0.01% or less, Cr: 16.0% to 30.0%, Mo: 0.60% to 3.0%, Ni: 0.10% to 2.5%, Nb: 0.20% to 0.80%, Al: 0.001% to 0.15%, N: 0.025% or less, and the balance being Fe and inevitable impurities, in which relational expressions (1) and (2) below are satisfied. C+N?0.030%??(1), 2Si+Ni?1.0%??(2), (in relational expressions (1) and (2), C, N, Si, and Ni each denote the contents (mass %) of the corresponding elements).Type: ApplicationFiled: August 25, 2017Publication date: June 13, 2019Applicant: JFE Steel CorporationInventors: Manami Ichikawa, Tetsuyuki Nakamura, Kunio Fukuda, Shin Ishikawa, Reiko Sugihara
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Publication number: 20190177825Abstract: Provided is a ferritic stainless steel that has good corrosion resistance and which exhibits good brazeability when subjected to high-temperature brazing with a Ni-containing brazing filler metal. The ferritic stainless steel has a composition containing, in mass %, C: 0.003 to 0.020%, Si: 0.05 to 0.60%, Mn: 0.05 to 0.50%, P: 0.04% or less, S: 0.02% or less, Cr: 17.0 to 24.0%, Ni: 0.20 to 0.80%, Cu: 0.01 to 0.80%, Mo: 0.01 to 2.50%, Al: 0.001 to 0.015%, Nb: 0.25 to 0.60%, and N: 0.020% or less, with the balance being Fe and incidental impurities, the composition satisfying formula (1) below and formula (2) below, Cu+Mo?0.30??(1) 4Ni?(Si+Mn)?0??(2) (wherein Cu and Mo in formula (1) and Ni, Si, and Mn in formula (2) each represent the content (mass %) of the corresponding element).Type: ApplicationFiled: August 25, 2017Publication date: June 13, 2019Applicant: JFE Steel CorporationInventors: Takayoshi Yano, Kunio Fukuda, Shin Ishikawa, Katsuhisa Yamauchi, Reiko Sugihara, Hideya Matsumoto