Patents by Inventor Shuji Nagasaki
Shuji Nagasaki 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: 11198918Abstract: The present invention has as its object to provide thickness 60 ?m or less ultra-thin stainless steel foil which secures high thickness precision and simultaneously secures plastic deformability and good elongation at break, that is, secures good press-formability (deep drawability). The present invention solves this problem by ultra-thin stainless steel foil which has three or more crystal grains in a thickness direction, has a recrystallization rate of 90% to 100%, and has a nitrogen concentration of a surface layer of 1.0 mass % or less. For this reason, there is provided a method of production of stainless steel foil comprising rolling stainless steel sheet, then performing final annealing and making a thickness 5 ?m to 60 ?m, wherein a rolling reduction ratio at rolling right before final annealing is 30% or more, a temperature of final annealing after rolling is 950° C. to 1050° C. in the case of austenitic stainless steel and 850° C. to 950° C.Type: GrantFiled: February 16, 2015Date of Patent: December 14, 2021Assignee: NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.Inventors: Hiroto Unno, Shinichi Terashima, Toru Inaguma, Koichi Nose, Naoki Fujimoto, Naoya Sawaki, Shuji Nagasaki
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Patent number: 10418601Abstract: A steel foil for a power storage device container includes a rolled steel foil which has a thickness of 200 ?m or less, a diffusion alloy layer which is formed on a surface layer of the rolled steel foil and contains Ni and Fe, and a chromium-based surface treatment layer which is formed on the diffusion alloy layer. The <111> polar density in a reverse pole figure of the diffusion alloy layer in a rolling direction is 2.0 to 6.0, and the aspect ratio of crystal in a surface of the diffusion alloy layer is 1.0 to 5.0.Type: GrantFiled: July 22, 2015Date of Patent: September 17, 2019Assignees: NIPPON STEEL CORPORATION, NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.Inventors: Masaharu Ibaragi, Koichi Nose, Kiyokazu Ishizuka, Yasuto Goto, Shuji Nagasaki, Hiroto Unno
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Patent number: 10201953Abstract: A steel foil according to an aspect of the present invention includes a rolled steel foil; and a Ni having <111>//RD texture plated on an outermost layer of the rolled steel foil. Regarding the steel foil, a <111> pole density in an inverse pole figure of a rolling direction may be 3.0 or more and 6.0 or less.Type: GrantFiled: April 18, 2013Date of Patent: February 12, 2019Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.Inventors: Kiyokazu Ishizuka, Yuji Kubo, Jun Nakatsuka, Shuji Nagasaki
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Patent number: 10205135Abstract: A steel foil for a power storage device container includes a rolled steel foil, a nickel layer formed on a surface of the rolled steel foil, and a chromium-based surface treatment layer formed on a surface of the nickel layer. The nickel layer includes an upper layer portion which is in contact with the chromium-based surface treatment layer and contains Ni of 90 mass % or more among metal elements, and a lower layer portion which is in contact with the rolled steel foil and contains Ni of less than 90 mass % among the metal elements and Fe. <111> polar density in a reverse pole figure of the nickel layer in a rolling direction is 3.0 to 6.0. The nickel layer has a sub-boundary which is a boundary between two crystals having a relative orientation difference of 2° to 5°, and a large angle boundary which is a boundary between two crystals having the relative orientation difference of equal to or more than 15°.Type: GrantFiled: July 22, 2015Date of Patent: February 12, 2019Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.Inventors: Masaharu Ibaragi, Koichi Nose, Kiyokazu Ishizuka, Yasuto Goto, Shuji Nagasaki, Hiroto Unno
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Patent number: 9997786Abstract: A steel foil according to an aspect of the present invention includes, by mass %, C: 0.0001 to 0.02%; Si: 0.001 to 0.01%; Mn: 0.01 to 0.3%; P: 0.001 to 0.02%; S: 0.0001 to 0.01%; Al: 0.0005 to 0.1%; N: 0.0001 to 0.004%; and a balance consisting of Fe and impurities, wherein a thickness is 5 to 15 ?m, and a tensile strength is more than 900 MPa and 1.200 MPa or less.Type: GrantFiled: April 18, 2013Date of Patent: June 12, 2018Assignees: NIPPON STEEL & SUMITOMO METAL CORPORATION, NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.Inventors: Kiyokazu Ishizuka, Yuji Kubo, Jun Nakatsuka, Shuji Nagasaki
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Patent number: 9902134Abstract: A metal foil including: a steel layer whose thickness is 10 to 200 ?m; an Al-containing metal layer arranged on the steel layer; and plural granular alloys which exist in an interface between the steel layer and the Al-containing metal layer, wherein, when a cutting-plane line of a surface of the Al-containing metal layer is defined as a contour curve and an approximation straight line of the contour curve is defined as a contour average straight line, a maximum point, whose distance from the contour average straight line is more than 10 ?m, is absent on the contour curve, and wherein, when an equivalent sphere diameter of the granular alloys is x in units of ?m and a thickness of the Al-containing metal layer is T in units of ?m, the granular alloys satisfy x?0.5T.Type: GrantFiled: November 16, 2011Date of Patent: February 27, 2018Assignees: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD., NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Takayuki Kobayashi, Shinichi Terashima, Masamoto Tanaka, Masami Fujishima, Masao Kurosaki, Jun Maki, Hideaki Suda, Shuji Nagasaki
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Publication number: 20170170436Abstract: A steel foil for a power storage device container includes a rolled steel foil, a nickel layer formed on a surface of the rolled steel foil, and a chromium-based surface treatment layer formed on a surface of the nickel layer. The nickel layer includes an upper layer portion which is in contact with the chromium-based surface treatment layer and contains Ni of 90 mass % or more among metal elements, and a lower layer portion which is in contact with the rolled steel foil and contains Ni of less than 90 mass % among the metal elements and Fe. <111> polar density in a reverse pole figure of the nickel layer in a rolling direction is 3.0 to 6.0. The nickel layer has a sub-boundary which is a boundary between two crystals having a relative orientation difference of 2° to 5°, and a large angle boundary which is a boundary between two crystals having the relative orientation difference of equal to or more than 15°.Type: ApplicationFiled: July 22, 2015Publication date: June 15, 2017Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION, NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.Inventors: Masaharu IBARAGI, Koichi NOSE, Kiyokazu ISHIZUKA, Yasuto GOTO, Shuji NAGASAKI, Hiroto UNNO
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Publication number: 20170162836Abstract: A steel foil for a power storage device container includes a rolled steel foil which has a thickness of 200 ?m or less, a diffusion alloy layer which is formed on a surface layer of the rolled steel foil and contains Ni and Fe, and a chromium-based surface treatment layer which is formed on the diffusion alloy layer. The <111> polar density in a reverse pole figure of the diffusion alloy layer in a rolling direction is 2.0 to 6.0, and the aspect ratio of crystal in a surface of the diffusion alloy layer is 1.0 to 5.0.Type: ApplicationFiled: July 22, 2015Publication date: June 8, 2017Applicants: NIPPON STEEL & SUMITOMO METAL CORPORATION, NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.Inventors: Masaharu IBARAGI, Koichi NOSE, Kiyokazu ISHIZUKA, Yasuto GOTO, Shuji NAGASAKI, Hiroto UNNO
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Publication number: 20170009312Abstract: The present invention has as its object to provide thickness 60 ?m or less ultra-thin stainless steel foil which secures high thickness precision and simultaneously secures plastic deformability and good elongation at break, that is, secures good press-formability (deep drawability). The present invention solves this problem by ultra-thin stainless steel foil which has three or more crystal grains in a thickness direction, has a recrystallization rate of 90% to 100%, and has a nitrogen concentration of a surface layer of 1.0 mass % or less. For this reason, there is provided a method of production of stainless steel foil comprising rolling stainless steel sheet, then performing final annealing and making a thickness 5 ?m to 60 ?m, wherein a rolling reduction ratio at rolling right before final annealing is 30% or more, a temperature of final annealing after rolling is 950° C. to 1050° C. in the case of austenitic stainless steel and 850° C. to 950° C.Type: ApplicationFiled: February 16, 2015Publication date: January 12, 2017Applicant: NIPPON STEEL & SUMIKIN MATERIALS CO., LTD.Inventors: Hiroto UNNO, Shinichi TERASHIMA, Toru INAGUMA, Koichi NOSE, Naoki FUJIMOTO, Naoya SAWAKI, Shuji NAGASAKI
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Patent number: 9296180Abstract: A metal foil including: a steel layer whose thickness is 10 to 200 ?m; an alloy layer which contains Fe and Al and which is formed on the steel layer; and an Al-containing metal layer arranged on the alloy layer, wherein, when a cutting-plane line of a surface of the Al-containing metal layer is defined as a contour curve and an approximation straight line of the contour curve is defined as a contour average straight line, a maximum point, whose distance from the contour average straight line is more than 10 ?m, is absent on the contour curve, and a thickness of the alloy layer is 0.1 to 8 ?m and the alloy layer contains an Al7Cu2Fe intermetallic compound or FeAl3 based intermetallic compounds.Type: GrantFiled: November 16, 2011Date of Patent: March 29, 2016Assignees: NIPPON STELL & SUMIKIN MATERIALS CO., LTD., NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Shinichi Terashima, Takayuki Kobayashi, Masamoto Tanaka, Masami Fujishima, Masao Kurosaki, Jun Maki, Hideaki Suda, Shuji Nagasaki
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Publication number: 20150136209Abstract: A flexible substrate has heat resistance to endure the high temperature such as sintering of a photovoltaic conversion layer of a compound-type thin film solar cell, can prevent permeation and/or diffusion of metal into the photovoltaic conversion layer, and can be used for many applications. The polyimide layer-containing flexible substrate has a metal substrate of metal foil made of ordinary steel or stainless steel having a coefficient of thermal expansion in a plane direction of not more than 15 ppm/K, or a metal substrate of metal foil made of that ordinary steel or stainless steel on the surface of which a metal layer comprising one of copper, nickel, zinc, or aluminum or an alloy layer of the same is provided, over which a polyimide layer having a layer thickness of 1.5 to 100 ?m and a glass transition point temperature of 300 to 450° C. is formed.Type: ApplicationFiled: May 14, 2013Publication date: May 21, 2015Applicant: NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD.Inventors: Kouichi Hattori, Katsufumi Hiraishi, Takuhei Ohta, Shinichi Terashima, Hideaki Suda, Masao Kurosaki, Masamoto Tanaka, Shuji Nagasaki, Atsushi Mizuyama
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Patent number: 8961713Abstract: The present invention provides stainless steel foil for flexible display use which enables fabrication of a TFT substrate for display use which is superior in shape recovery after being rolled up or bent and which is high in surface flatness and is characterized by having a thickness of 20 ?m to 200 ?m, a surface roughness Ra of 50 nm or less, and a shape recovery of a distortion angle of 10° or less after being wound around a 30 mm diameter cylinder.Type: GrantFiled: May 13, 2009Date of Patent: February 24, 2015Assignee: Nippon Steel Materials Co, Ltd.Inventors: Noriko Yamada, Toyoshi Ogura, Yuji Kubo, Shuji Nagasaki
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Patent number: 8961717Abstract: The present invention provides stainless steel foil for flexible display use which enables fabrication of a TFT substrate for display use which is superior in shape recovery after being rolled up or bent and which is high in surface flatness and is characterized by having a thickness of 20 ?m to 200 ?m, a surface roughness Ra of 50 nm or less, and a shape recovery of a distortion angle of 10° or less after being wound around a 30 mm diameter cylinder.Type: GrantFiled: February 28, 2014Date of Patent: February 24, 2015Assignee: Nippon Steel & Sumikin Materials Co., Ltd.Inventors: Noriko Yamada, Toyoshi Ogura, Yuji Kubo, Shuji Nagasaki
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Publication number: 20150037684Abstract: A steel foil according to an aspect of the present invention includes, by mass %, C: 0.0001 to 0.02%; Si: 0.001 to 0.01%; Mn: 0.01 to 0.3%; P: 0.001 to 0.02%; S: 0.0001 to 0.01%; Al: 0.0005 to 0.1%; N: 0.0001 to 0.004%; and a balance consisting of Fe and impurities, wherein a thickness is 5 to 15 ?m, and a tensile strength is more than 900 MPa and 1.200 MPa or less.Type: ApplicationFiled: April 18, 2013Publication date: February 5, 2015Inventors: Kiyokazu Ishizuka, Yuji Kubo, Jun Nakatsuka, Shuji Nagasaki
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Publication number: 20140287259Abstract: A steel foil according to an aspect of the present invention includes a rolled steel foil; and a Ni having <111>//RD texture plated on an outermost layer of the rolled steel foil. Regarding the steel foil, a <111> pole density in an inverse pole figure of a rolling direction may be 3.0 or more and 6.0 or less.Type: ApplicationFiled: April 18, 2013Publication date: September 25, 2014Inventors: Kiyokazu Ishizuka, Yuji Kubo, Jun Nakatsuka, Shuji Nagasaki
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Publication number: 20140173860Abstract: The present invention provides stainless steel foil for flexible display use which enables fabrication of a TFT substrate for display use which is superior in shape recovery after being rolled up or bent and which is high in surface flatness and is characterized by having a thickness of 20 ?m to 200 ?m, a surface roughness Ra of 50 nm or less, and a shape recovery of a distortion angle of 10° or less after being wound around a 30 mm diameter cylinder.Type: ApplicationFiled: February 28, 2014Publication date: June 26, 2014Applicant: NIPPON STEEL MATERIALS CO, LTD.Inventors: Noriko Yamada, Toyoshi Ogura, Yuji Kubo, Shuji Nagasaki
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Publication number: 20130236737Abstract: A metal foil including: a steel layer whose thickness is 10 to 200 ?m; an alloy layer which contains Fe and Al and which is formed on the steel layer; and an Al-containing metal layer arranged on the alloy layer, wherein, when a cutting-plane line of a surface of the Al-containing metal layer is defined as a contour curve and an approximation straight line of the contour curve is defined as a contour average straight line, a maximum point, whose distance from the contour average straight line is more than 10 ?m, is absent on the contour curve, and a thickness of the alloy layer is 0.1 to 8 ?m and the alloy layer contains an Al7Cu2Fe intermetallic compound or FeAl3 based intermetallic compounds.Type: ApplicationFiled: November 16, 2011Publication date: September 12, 2013Inventors: Shinichi Terashima, Takayuki Kobayashi, Masamoto Tanaka, Masami Fujishima, Masao Kurosaki, Jun Maki, Hideaki Suda, Shuji Nagasaki
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Publication number: 20130236734Abstract: A metal foil including: a steel layer whose thickness is 10 to 200 ?m; an Al-containing metal layer arranged on the steel layer; and plural granular alloys which exist in an interface between the steel layer and the Al-containing metal layer, wherein, when a cutting-plane line of a surface of the Al-containing metal layer is defined as a contour curve and an approximation straight line of the contour curve is defined as a contour average straight line, a maximum point, whose distance from the contour average straight line is more than 10 ?m, is absent on the contour curve, and wherein, when an equivalent sphere diameter of the granular alloys is x in units of ?m and a thickness of the Al-containing metal layer is T in units of ?m, the granular alloys satisfy x?0.5T.Type: ApplicationFiled: November 16, 2011Publication date: September 12, 2013Inventors: Takayuki Kobayashi, Shinichi Terashima, Masamoto Tanaka, Masami Fujishima, Masao Kurosaki, Jun Maki, Hideaki Suda, Shuji Nagasaki
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Publication number: 20110070461Abstract: The present invention provides stainless steel foil for flexible display use which enables fabrication of a TFT substrate for display use which is superior in shape recovery after being rolled up or bent and which is high in surface flatness and is characterized by having a thickness of 20 ?m to 200 ?m, a surface roughness Ra of 50 nm or less, and a shape recovery of a distortion angle of 10° or less after being wound around a 30 mm diameter cylinder.Type: ApplicationFiled: May 13, 2009Publication date: March 24, 2011Inventors: Noriko Yamada, Toyoshi Ogura, Yuji Kubo, Shuji Nagasaki
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Publication number: 20100233509Abstract: The present invention provides a laminate structure with little warping comprised of a stainless steel foil, a resin, and a metal foil, that is, a laminate structure comprised of a three-layer structure of a stainless steel foil, a resin, and a metal foil wherein the stainless steel foil is comprised of mixed phases of a ferromagnetic phase and a nonferromagnetic phase and the ratio of the ferromagnetic phase is 0.1 mass % to 4.0 mass %.Type: ApplicationFiled: April 14, 2006Publication date: September 16, 2010Inventors: Tsuyoshi Yamamoto, Shuji Nagasaki, Atsushi Mizuyama, Jun Nakatsuka