Patents by Inventor Fumio Fudanoki
Fumio Fudanoki 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: 10260134Abstract: A heat-resistant cold rolled ferritic stainless steel sheet containing, in mass %, 0.02% or less of C, 0.1% to 1.0% of Si, greater than 0.6% to 1.5% of Mn, 0.01% to 0.05% of P, 0.0001% to 0.0100% of S, 13.0% to 20.0% of Cr, 0.1% to 3.0% of Mo, 0.005% to 0.20% of Ti, 0.3% to 1.0% of Nb, 0.0002% to 0.0050% of B, 0.005% to 0.50% of Al, 0.02% or less of N, with the balance being Fe and inevitable impurities, in which {111}-oriented grains are present at an area ratio of 20% or greater in a region from a surface layer to t/4 (t is a sheet thickness), {111}-oriented grains are present at an area ratio of 40% or greater in a region from t/4 to t/2, and {011}-oriented grains are present at an area ratio of 15% or less in the entire region in a thickness direction.Type: GrantFiled: December 15, 2015Date of Patent: April 16, 2019Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATIONInventors: Junichi Hamada, Yuji Koyama, Yoshiharu Inoue, Tadashi Komori, Fumio Fudanoki, Toshio Tanoue, Naoto Ono
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Patent number: 9714459Abstract: The present invention is directed to a heat-resistant austenitic stainless steel sheet comprising, by mass %, C: 0.03% to 0.06%, N: 0.1% to 0.3%, Si: 1% or less Mn: 3% or less, P: 0.04% or less, S: 0.03% or less, Ni: 5 to 12%, Cr: 15 to 20%, Al: 0.01% to 0.1%, Nb: 0.05% to 0.3%, V: 0.05% to 0.30%, Ti: 0.03% or less, (Nb+V)/(C+N): 2 or less and further a balance of Fe and unavoidable impurities, and wherein an amount of precipitates mainly comprised of carbonitrides is 1% or less.Type: GrantFiled: March 28, 2013Date of Patent: July 25, 2017Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATIONInventors: Yoshiharu Inoue, Fumio Fudanoki, Junichi Hamada
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Patent number: 9611525Abstract: An aspect of a ferritic stainless steel contains, by mass %: C: 0.03% or less; N: 0.03% or less; Si: more than 0.1% to 1% or less; Mn: 0.02% to 1.2%; Cr: 15% to 23%; Al: 0.002% to 0.5%; and either one or both of Nb and Ti, with the remainder being Fe and unavoidable impurities, wherein Expression (1) and Expression (2) illustrated below are satisfied, an oxide film is formed on a surface thereof, and the oxide film contains Cr, Si, Nb, Ti and Al in a total cationic fraction of 30% or more, 8(C+N)+0.03?Nb+Ti?0.6??(1) Si+Cr+Al+{Nb+Ti?8(C+N)}?15.5??(2).Type: GrantFiled: March 28, 2012Date of Patent: April 4, 2017Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATIONInventors: Nobuhiko Hiraide, Fumio Fudanoki, Shunji Sakamoto
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Publication number: 20160097114Abstract: A heat-resistant cold rolled ferritic stainless steel sheet containing, in mass %, 0.02% or less of C, 0.1% to 1.0% of Si, greater than 0.6% to 1.5% of Mn, 0.01% to 0.05% of P, 0.0001% to 0.0100% of S, 13.0% to 20.0% of Cr, 0.1% to 3.0% of Mo, 0.005% to 0.20% of Ti, 0.3% to 1.0% of Nb, 0.0002% to 0.0050% of B, 0.005% to 0.50% of Al, 0.02% or less of N, with the balance being Fe and inevitable impurities, in which {111}-oriented grains are present at an area ratio of 20% or greater in a region from a surface layer to t/4 (t is a sheet thickness), {111}-oriented grains are present at an area ratio of 40% or greater in a region from t/4 to t/2, and {011}-oriented grains are present at an area ratio of 15% or less in the entire region in a thickness direction.Type: ApplicationFiled: December 15, 2015Publication date: April 7, 2016Applicant: Nippon Steel & Sumikin Stainless Steel CorporationInventors: Junichi HAMADA, Yuji KOYAMA, Yoshiharu INOUE, Tadashi KOMORI, Fumio FUDANOKI, Toshio TANOUE, Naoto ONO
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Publication number: 20150083283Abstract: The present invention is directed to a heat-resistant austenitic stainless steel sheet comprising, by mass %, C: 0.03% to 0.06%, N: 0.1% to 0.3%, Si: 1% or less Mn: 3% or less, P: 0.04% or less, S: 0.03% or less, Ni: 5 to 12%, Cr: 15 to 20%, Al: 0.01% to 0.1%, Nb: 0.05% to 0.3%, V: 0.05% to 0.30%, Ti: 0.03% or less, (Nb+V)/(C+N):2 or less and further a balance of Fe and unavoidable impurities, and wherein an amount of precipitates mainly comprised of carbonitrides is 1% or less.Type: ApplicationFiled: March 28, 2013Publication date: March 26, 2015Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATIONInventors: Yoshiharu Inoue, Fumio Fudanoki, Junichi Hamada
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Publication number: 20150020933Abstract: Provided is a heat-resistant cold rolled ferritic stainless steel sheet containing, in terms of mass %, 0.02% or less of C, 0.1% to 1.0% of Si, greater than 0.6% to 1.5% of Mn, 0.01% to 0.05% of P, 0.0001% to 0.0100% of S, 13.0% to 20.0% of Cr, 0.1% to 3.0% of Mo, 0.005% to 0.20% of Ti, 0.3% to 1.0% of Nb, 0.0002% to 0.0050% of B, 0.005% to 0.50% of Al, and 0.02% or less of N, with the balance being Fe and inevitable impurities, in which {111}-oriented grains are present at an area ratio of 20% or greater in a region from a surface layer to t/4 (t is a sheet thickness), {111}-oriented grains are present at an area ratio of 40% or greater in a region from t/4 to t/2, and {011}-oriented grains are present at an area ratio of 15% or less in the entire region in a thickness direction.Type: ApplicationFiled: March 26, 2013Publication date: January 22, 2015Applicant: Nippon Steel & Sumikin Stainless Steel CorporationInventors: Junichi Hamada, Yuji Koyama, Yoshiharu Inoue, Tadashi Komori, Fumio Fudanoki, Toshio Tanoue, Naoto Ono
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Publication number: 20140069619Abstract: An aspect of a ferritic stainless steel contains, by mass %: C: 0.03% or less; N: 0.03% or less; Si: more than 0.1% to 1% or less; Mn: 0.02% to 1.2%; Cr: 15% to 23%; Al: 0.002% to 0.5%; and either one or both of Nb and Ti, with the remainder being Fe and unavoidable impurities, wherein Expression (1) and Expression (2) illustrated below are satisfied, an oxide film is formed on a surface thereof, and the oxide film contains Cr, Si, Nb, Ti and Al in a total cationic fraction of 30% or more, 8(C+N)+0.03?Nb+Ti?0.6??(1) Si+Cr+Al+{Nb+Ti?8(C+N)}?15.5??(2).Type: ApplicationFiled: March 28, 2012Publication date: March 13, 2014Applicant: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATIONInventors: Nobuhiko Hiraide, Fumio Fudanoki, Shunji Sakamoto
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Patent number: 8062584Abstract: The present invention provides, as a material superior in heat resistance in a hot environment where the maximum temperature of the exhaust gas becomes 750 to 900° C., ferritic stainless steel sheet superior in heat resistance in a broad temperature region of 750 to 900° C. with long term stability by a smaller amount of addition of Mo than SUS444 containing about 2% of expensive Mo, that is, ferritic stainless steel sheet superior in heat resistance characterized by containing, by mass %, C: 0.01% or less, N: 0.02% or less, Si: 0.05 to 1%, Mn: 0.1 to 2%, Cr: 10 to 30%, Mo: 0.1 to 1%, Cu: 1 to 2%, Nb: 0.2 to 0.7%, Ti: 0.01 to 0.3%, and B: 0.0002 to 0.0050%, having a balance of Fe and unavoidable impurities, and having a 0.2% yield strength at 750° C. of 70 MPa or more.Type: GrantFiled: December 26, 2007Date of Patent: November 22, 2011Assignee: Nippon Steel & Sumikin Stainless Steel CorporationInventors: Junichi Hamada, Haruhiko Kajimura, Toshio Tanoue, Fumio Fudanoki, Yoshiharu Inoue
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Publication number: 20100233015Abstract: This invention provides a steel sheet for structural components excellent in impact absorption property comprising, in mass %, C: 0.005 to 0.05%, N: 0.01 to 0.30%, Si: 0.1 to 2%, Mn: 0.1 to 15%, Ni: 0.5 to 8%, Cu: 0.1 to 5%, Cr: 11 to 20%, Al: 0.01 to 0.5%, and a balance of Fe and unavoidable impurities, wherein Md30 value given by equation (A) is 0 to 100° C., and total impact energy absorption in dynamic tensile testing is 500 MJ/m3 or greater: Md30=551?462(C+N)?9.2Si?8.1Mn?13.7Cr?29(Ni+Cu) ??(A).Type: ApplicationFiled: October 30, 2007Publication date: September 16, 2010Inventors: Junichi Hamada, Haruhiko Kajimura, Fumio Fudanoki, Toshio Tanoue, Ken Kimura
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Patent number: 7754344Abstract: A ferritic stainless steel welded pipe is ferritic stainless steel welded pipe contains, by wt %, C: 0.001 to 0.015%, N: 0.001 to 0.020%, Cr: 11 to 25%, Mo: 0.01 to 2.0%, one or both of Ti and Nb in 0.05 to 0.5%, and B: 0.0003 to 0.0030%, having an elongation of the welded pipe material in the direction becoming the circumferential direction of 30% or more, and having an average Lankford value of 1.5 or more, which is formed, welded, and sized by 0.5 to 2.0% in terms of circumferential length, then annealed at 700 to 850° C., and has the hardness difference between the weld zone and the matrix is 10 to 40 in range and a ratio between the bead thickness of the weld zone and the thickness of the matrix is 1.05 to 1.3.Type: GrantFiled: December 19, 2005Date of Patent: July 13, 2010Assignee: Nippon Steel & Sumikin Stainless Steel CorporationInventors: Naoto Ono, Toshio Tanoue, Fumio Fudanoki, Tadashi Komori, Shuji Yamamoto
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Publication number: 20090092513Abstract: The present invention provides, as a material superior in heat resistance in a hot environment where the maximum temperature of the exhaust gas becomes 750 to 900° C., ferritic stainless steel sheet superior in heat resistance in a broad temperature region of 750 to 900° C. with long term stability by a smaller amount of addition of Mo than SUS444 containing about 2% of expensive Mo, that is, ferritic stainless steel sheet superior in heat resistance characterized by containing, by mass %, C: 0.01% or less, N: 0.02% or less, Si: 0.05 to 1%, Mn: 0.1 to 2%, Cr: 10 to 30%, Mo: 0.1 to 1%, Cu: 1 to 2%, Nb: 0.2 to 0.7%, Ti: 0.01 to 0.3%, and B: 0.0002 to 0.0050%, having a balance of Fe and unavoidable impurities, and having a 0.2% yield strength at 750° C. of 70 MPa or more.Type: ApplicationFiled: December 26, 2007Publication date: April 9, 2009Inventors: Junichi Hamada, Haruhiko Kajimura, Toshio Tanoue, Fumio Fudanoki, Yoshiharu Inoue
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Publication number: 20070170226Abstract: A ferritic stainless steel welded pipe is ferritic stainless steel welded pipe contains, by wt %, C: 0.001 to 0.015%, N: 0.001 to 0.020%, Cr: 11 to 25%, Mo: 0.01 to 2.0%, one or both of Ti and Nb in 0.05 to 0.5%, and B: 0.0003 to 0.0030%, having an elongation of the welded pipe material in the direction becoming the circumferential direction of 30% or more, and having an average Lankford value of 1.5 or more, which is formed, welded, and sized by 0.5 to 2.0% in terms of circumferential length, then annealed at 700 to 850° C., and has the hardness difference between the weld zone and the matrix is 10 to 40 in range and a ratio between the bead thickness of the weld zone and the thickness of the matrix is 1.05 to 1.3.Type: ApplicationFiled: December 19, 2005Publication date: July 26, 2007Inventors: Naoto Ono, Toshio Tanoue, Fumio Fudanoki, Tadashi Komori, Shuji Yamamoto
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Patent number: 6329081Abstract: There is provided a stainless steel sheet material, used for a semiconductor manufacturing device, to which it difficult for fine dust to be attached and from the surface of which the attaching dust can be easily washed away. Also, there is provided a method of manufacturing the stainless steel sheet material. A stainless steel sheet material characterized in that: the number of pinholes, the area of each pinhole exceeding 0.25 mm2, in the area of 10 cm2 on the surface of a skinpass-rolled stainless steel sheet material is not more than 10; and the average surface roughness Ra on the center line in the direction perpendicular to the rolling direction is not more than 0.15 &mgr;m. A method of manufacturing a stainless steel sheet material comprising the steps of: annealing a stainless steel cold-rolled sheet in a heat-treatment furnace having no support rollers in a temperature region exceeding 600° C.Type: GrantFiled: May 17, 2000Date of Patent: December 11, 2001Assignee: Nippon Steel CorporationInventors: Fumio Fudanoki, Toshihiko Sugimoto, Satoshi Akamatsu, Masanori Hashimoto
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Patent number: 5426084Abstract: A metallic carrier for an automobile catalyst, comprising a metallic honeycomb and a jacket, characterized in that a foil material constituting the metallic honeycomb is comprised of an Fe-Cr-Al-base alloy and has high-temperature proof stresses of 22 kgf/mm.sup.2 or more and 11 kgf/mm.sup.2 or more respectively at 600.degree. C. and 700.degree. C. with the foil material as annealed at a temperature of the recrystallization temperature of the foil material or above.Type: GrantFiled: November 2, 1993Date of Patent: June 20, 1995Assignee: Nippon Steel CorporationInventors: Masuhiro Fukaya, Keiichi Ohmura, Mikio Yamanaka, Fumio Fudanoki, Hidehiko Sumitomo
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Patent number: 5411610Abstract: According to the present invention, a strength of 120 to 200 kgf/mm.sup.2 in terms of 0.2% yield point and optionally a spring critical value of 55 to 150 kgf/mm.sup.2 are imparted to a high-strength stainless steel foil for corrugation by subjecting a thin sheet of a stainless steel comprising an alloy composed mainly of 10 to 40% by weight of Cr and 1 to 10% by weight of Al to final cold rolling and optionally subjecting the cold-rolled sheet to an aging treatment at a temperature in the range of from 80.degree. to 500.degree. C. after the completion of the final cold rolling. This enables corrugation to be effected at a high corrugation rate of 10 m/min or more.Type: GrantFiled: August 19, 1993Date of Patent: May 2, 1995Assignee: Nippon Steel CorporationInventors: Jun Araki, Jun Nakatuka, Wataru Murata, Hidehiko Sumitomo, Masayuki Kasuya, Hitoshi Ota, Yuichi Kato, Masuhiro Fukaya, Keiichi Ohmura, Mikio Yamanaka, Fumio Fudanoki
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Patent number: 5045404Abstract: A heat-resistant stainless steel foil for a catalyst-carrier of combustion exhaust gas purifiers, consisting essentially in weight percentage of:more than 0.06 up to 0.15 of Ln, the Ln being a mixture of La, Ce, Pr and Nd;from 8x(%Ln+0.015) /45 to 0.1 of P;from 4.5 to 6.5 of Al;from 13 to 25 of Cr;not more than 0.025 of C;not more than 0.02 of N;not more than 0.03 of C+N; andthe balance consisting of Fe and unavoidable impurities.Type: GrantFiled: September 26, 1990Date of Patent: September 3, 1991Assignees: Nippon Steel Corporation, Toyota Jidosha Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.Inventors: Keiichi Ohmura, Miko Yamanaka, Fumio Fudanoki, Masayuki Tendoh, Kenji Hirashima, Masaaki Kobayashi, Shinji Shibata, Tomoyuki Sugino, Toshihiro Takada, Yoshio Nishizawa, Akihiko Kasahara