Patents by Inventor Akito Mizutani
Akito Mizutani 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: 20240063399Abstract: Provided is a chromium-containing steel sheet for a current collector of a nonaqueous electrolyte secondary battery. The chromium-containing steel sheet for a current collector of a nonaqueous electrolyte secondary battery has a chemical composition containing Cr in an amount of 10% by mass or more. A parameter Sa defined in ISO 25178 is from 0.15 ?m to 0.50 ?m inclusive, and a parameter Ssk defined in ISO 25178 is more than 0.Type: ApplicationFiled: December 13, 2021Publication date: February 22, 2024Applicant: JFE Steel CorporationInventors: Takayoshi Yano, Akito Mizutani, Kazuhiko Ikeda, Tomoko Fujii, Hiroshi Matsunaga
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Publication number: 20240011136Abstract: Provided is a stainless steel foil for a catalyst support of an exhaust gas purifier excellent in both diffusion bonding resistance and brazeability and also excellent in oxidation resistance at high temperatures. The stainless steel foil for a catalyst support of an exhaust gas purifier comprises: a predetermined chemical composition; a parameter Sa defined in ISO 25178 of 0.50 ?m to 3.00 ?m; and a parameter Str defined in ISO 25178 of 0.20 to 1.00.Type: ApplicationFiled: December 13, 2021Publication date: January 11, 2024Applicant: JFE STEEL CORPORATIONInventors: Akito MIZUTANI, Takayoshi YANO, Kazuhiko IKEDA, Tomoko FUJII, Hiroshi MATSUNAGA
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Publication number: 20240006621Abstract: It is provided a stainless steel sheet for fuel cell separators with low contact resistance, which can be produced very advantageously in terms of safety as well as mass production. A parameter Sa specified in ISO 25178 is set to 0.15 ?m or more and 0.50 ?m or less, and a parameter Ssk specified in ISO 25178 is set to more than 0.Type: ApplicationFiled: December 13, 2021Publication date: January 4, 2024Applicant: JFE STEEL CORPORATIONInventors: Takayoshi YANO, Akito MIZUTANI, Kazuhiko IKEDA, Tomoko FUJII, Hiroshi MATSUNAGA
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Patent number: 11767573Abstract: A ferritic stainless steel sheet comprises a chemical composition containing, in mass %, C: 0.030% or less, Si: 3.0% or less, Mn: 1.0% or less, P: 0.040% or less, S: 0.010% or less, Cr: 11.0% to 30.0%, Al: 8.0% to 20.0%, Ni: 0.05% to 0.50%, N: 0.020% or less, and at least one selected from the group consisting of Zr: 0.01% to 0.20% and Hf: 0.01% to 0.20%, with a balance consisting of Fe and inevitable impurities.Type: GrantFiled: August 26, 2019Date of Patent: September 26, 2023Assignee: JFE STEEL CORPORATIONInventors: Akito Mizutani, Rinta Sato, Mitsuyuki Fujisawa
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Publication number: 20230271405Abstract: A method of producing a ferritic stainless steel sheet comprises subjecting an Al vapor deposited layer-equipped stainless steel sheet to a heat treatment at 600° C. to 1300° C. for 1 minute or more. The Al vapor deposited layer-equipped stainless steel sheet comprises a ferritic stainless steel and an Al vapor deposited layer thereon. The ferritic stainless steel sheet has a thickness of 100 ?m or less and a chemical composition containing, in mass %, C: ?0.030%, Si: ?1.0%, Mn: ?1.0%, P: ?0.040%, S: ?0.010%, Cr: 11.0-30.0%, Al: 4.0-6.5%, Ni: 0.05-0.50%, Mo: 0.01-6.0%, N: ?0.020% s, and Zr: 0.01-0.20% and/or Hf: 0.01-0.20%, with a balance consisting of Fe and inevitable impurities. A thickness of the Al vapor deposited layer per one side is 0.5-10.0 ?m.Type: ApplicationFiled: May 8, 2023Publication date: August 31, 2023Applicant: JFE STEEL CORPORATIONInventors: Akito MIZUTANI, Mitsuyuki FUJISAWA
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Publication number: 20230193474Abstract: In an Al coating layer-equipped stainless steel sheet, a base steel sheet has a predetermined chemical composition, and a total content of Fe and Cr at a first depth of an Al coating layer is 20 mass % to 70 mass %.Type: ApplicationFiled: April 20, 2021Publication date: June 22, 2023Applicant: JFE STEEL CORPORATIONInventors: Akito MIZUTANI, Mitsuyuki FUJISAWA
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Patent number: 11497085Abstract: A Fe—Cr alloy having a chemical composition with increased Si and Al contents, in which the chemical composition satisfies the following formula (1) in terms of the Si content, Al content, and Cr content: 14.0?% Si+1.15×% Al+0.35×% Cr ??(1).Type: GrantFiled: December 5, 2018Date of Patent: November 8, 2022Assignee: JFE STEEL CORPORATIONInventors: Akito Mizutani, Tatsuhiko Hiratani, Mitsuyuki Fujisawa
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Publication number: 20220267883Abstract: A predetermined chemical composition is contained, and a predetermined relationship of the contents of Ag, B and REM is satisfied.Type: ApplicationFiled: June 4, 2020Publication date: August 25, 2022Applicant: JFE STEEL CORPORATIONInventors: Akito MIZUTANI, Mitsuyuki FUJISAWA
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Publication number: 20220170144Abstract: Provided is an Al or Al alloy-coated stainless steel sheet having a coating substrate and a hot-dip Al or Al alloy coated layer provided on a surface of the coating substrate, the coating substrate having a predetermined chemical composition, the Mo content and W content of the chemical composition of the coating substrate, the thickness of the coating substrate, and the thickness of the hot-dip Al or Al alloy coated layer satisfying predetermined relations.Type: ApplicationFiled: April 24, 2020Publication date: June 2, 2022Applicant: JFE STEEL CORPORATIONInventors: Akito MIZUTANI, Mitsuyuki FUJISAWA
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Publication number: 20220118740Abstract: A ferritic stainless steel sheet comprises a chemical composition containing, in mass %, C: 0.030% or less, Si: 1.0% or less, Mn: 1.0% or less, P: 0.040% or less, S: 0.010% or less, Cr: 11.0% to 30.0%, Al: 8.0% to 20.0%, Ni: 0.05% to 0.50%, Mo: 0.01% to 6.0%, N: 0.020% or less, and at least one selected from the group consisting of Zr: 0.01% to 0.20% and Hf: 0.01% to 0.20%, with a balance consisting of Fe and inevitable impurities.Type: ApplicationFiled: January 8, 2020Publication date: April 21, 2022Applicant: JFE STEEL CORPORATIONInventors: Akito MIZUTANI, Mitsuyuki FUJISAWA
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Publication number: 20220056547Abstract: A ferritic stainless steel sheet comprises a chemical composition containing, in mass %, C: 0.030% or less, Si: 3.0% or less, Mn: 1.0% or less, P: 0.040% or less, S: 0.010% or less, Cr: 11.0% to 30.0%, Al: 8.0% to 20.0%, Ni: 0.05% to 0.50%, N: 0.020% or less, and at least one selected from the group consisting of Zr: 0.01% to 0.20% and Hf: 0.01% to 0.20%, with a balance consisting of Fe and inevitable impurities.Type: ApplicationFiled: August 26, 2019Publication date: February 24, 2022Applicant: JFE STEEL CORPORATIONInventors: Akito MIZUTANI, Rinta SATO, Mitsuyuki FUJISAWA
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Publication number: 20220015196Abstract: A method for producing a Fe—Cr alloy comprises: rolling a slab having a chemical composition containing, by mass %, C: 0.020% or less, Si: 0.01% to 1.5%, Mn: 1.0% or less, P: 0.040% or less, S: 0.010% or less, Cr: 16.0% to 30.0%, Al: 2.0% to 6.5%, N: 0.020% or less, and Ni: 0.50% or less, with the balance being Fe and inevitable impurities to obtain a sheet material; subjecting the sheet material to siliconizing treatment by a thermal CVD method to obtain a Fe—Cr alloy having a Si content of more than 1.5 mass % and 10.0 mass % or less and satisfying: 14.0%?Si+1.15×% Al+0.35×% Cr??(1) where % Si, % Al, and % Cr indicate Si, Al, and Cr contents, by mass %, respectively in the chemical composition of the Fe—Cr alloy.Type: ApplicationFiled: September 28, 2021Publication date: January 13, 2022Applicant: JFE STEEL CORPORATIONInventors: Akito Mizutani, Tatsuhiko Hiratani, Mitsuyuki Fujisawa
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Patent number: 11142814Abstract: Provided is a ferritic-austenitic duplex stainless steel sheet in which no blowholes are formed during welding and which has excellent strength. A chemical composition includes, in mass %, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0 to 7.0%, P: 0.07% or less, S: 0.030% or less, Cr: 18.0 to 24.0%, Ni: 0.1 to 3.0%, Mo: 0.01 to 1.0%, Cu: 0.1 to 3.0%, Al: 0.003 to 0.10%, Zr: 0.01 to 0.50%, and N: 0.15 to 0.30%, with the balance being Fe and incidental impurities, the chemical composition satisfying formula (1) below and formula (2) below. N—Zr/6.5?0.15%??(1) N—Zr/6.5?0.23%??(2) Here, in formula (1) and formula (2), N represents a content (mass %) of the corresponding chemical element N and Zr represents a content (mass %) of the corresponding chemical element Zr.Type: GrantFiled: January 18, 2018Date of Patent: October 12, 2021Assignee: JFE STEEL CORPORATIONInventors: Akito Mizutani, Mitsuyuki Fujisawa
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Patent number: 11008636Abstract: A stainless steel foil having a chemical composition comprising, by mass %, C: 0.015% or less, Si: 0.50% or less, Mn: 0.50% or less, P: 0.040% or less, S: 0.010% or less, Cr: 10.0% or more and less than 16.0%, Al: 2.5 to 4.5%, N: 0.015% or less, Ni: 0.05 to 0.50%, Cu: 0.01 to 0.10%, Mo: 0.01 to 0.15%, at least one selected from the group consisting of Ti: 0.01 to 0.30%, Zr: 0.01 to 0.20%, Hf: 0.01 to 0.20%, and REM: 0.01 to 0.20%, where Ti+Zr+Hf+2REM?0.06 and 0.30?Ti+Zr+Hf are satisfied.Type: GrantFiled: October 16, 2017Date of Patent: May 18, 2021Assignee: JFE STEEL CORPORATIONInventors: Akito Mizutani, Mitsuyuki Fujisawa
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Patent number: 10968499Abstract: Ferritic stainless steel that has excellent formability and ridging resistance and can be produced with high productivity is provided. The ferritic stainless steel has: a predetermined chemical composition; a microstructure containing ferrite crystal grains which satisfy at least one of a C concentration of 2CC or more and an N concentration of 2CN or more, the ferrite crystal grains having a volume fraction with respect to a whole volume of the microstructure of 5% or more and 50% or less, where CC and CN are respectively C content and N content in the steel in mass %; and a Vickers hardness of 180 or less.Type: GrantFiled: July 2, 2015Date of Patent: April 6, 2021Assignee: JFE STEEL CORPORATIONInventors: Akito Mizutani, Masataka Yoshino, Mitsuyuki Fujisawa, Ayako Ta
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Publication number: 20210059019Abstract: A Fe—Cr alloy having a chemical composition with increased Si and Al contents, in which the chemical composition satisfies the following formula (1) in terms of the Si content, Al content, and Cr content: 14.0?% Si+1.15×% Al+0.35×% Cr ??(1).Type: ApplicationFiled: December 5, 2018Publication date: February 25, 2021Applicant: JFE STEEL CORPORATIONInventors: Akito MIZUTANI, Tatsuhiko HIRATANI, Mitsuyuki FUJISAWA
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Patent number: 10821706Abstract: Disclosed is a ferritic stainless steel sheet including: a chemical composition containing, by mass %, C: 0.025% or less, Si: 0.01% to 2.0%, Mn: 0.01% to 1.0%, P: 0.050% or less, S: 0.010% or less, Cr: 10.5% to 20.0%, Al: 0.01% to 0.50%, Ni: 0.01% to 0.60%, Ti: 0.10% to 0.50%, and N: 0.025% or less, with the balance being Fe and inevitable impurities; and a coating layer including at least one coating layer selected from the group consisting of an Al coating layer, an Fe coating layer, and a Si coating layer on one or both sides thereof, in which the coating layer has a total thickness of 30 nm to 150 nm per side.Type: GrantFiled: April 21, 2017Date of Patent: November 3, 2020Assignee: JFE STEEL CORPORATIONInventors: Akito Mizutani, Mitsuyuki Fujisawa
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Patent number: 10801084Abstract: Provided are a material for cold rolled stainless steel sheets having sufficient corrosion resistance, excellent surface quality, excellent formability, and excellent ridging resistance; a method for manufacturing the same; and a cold rolled steel sheet. A material for cold rolled stainless steel sheets according to the present invention contains C: 0.005% to 0.025%, Si: 0.02% to 0.50%, Mn: 0.55% to 1.0%, P: 0.040% or less, S: 0.01% or less, Cr: 15.5% to 18.0%, Ni: 0.01% to 1.0%, Al: 0.001% to 0.10%, and N: 0.005% to 0.025% on a mass basis, the remainder being Fe and inevitable impurities, and has a metallographic structure containing 5% to 20% of a martensite phase in terms of volume fraction, the remainder being a ferrite phase.Type: GrantFiled: July 2, 2015Date of Patent: October 13, 2020Assignee: JFE Steel CorporationInventors: Akito Mizutani, Masataka Yoshino, Mitsuyuki Fujisawa, Chikara Kami
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Patent number: 10626486Abstract: Stainless steel that has excellent formability and ridging resistance and can be produced with high productivity is provided. The stainless steel comprises: a chemical composition containing, in mass %, C: 0.005% to 0.050%, Si: 0.01% to 1.00%, Mn: 0.01% to 1.0%, P: 0.040% or less, S: 0.010% or less, Cr: 15.5% to 18.0%, Ni: 0.01% to 1.0%, Al: 0.001% to 0.10%, and N: 0.005% to 0.06%, with a balance being Fe and incidental impurities; and a microstructure containing a martensite phase of 1% to 10% in volume fraction with respect to a whole volume of the microstructure.Type: GrantFiled: July 2, 2015Date of Patent: April 21, 2020Assignee: JFE STEEL CORPORATIONInventors: Akito Mizutani, Masataka Yoshino, Mitsuyuki Fujisawa, Ayako Ta