Patents by Inventor Akihiko Furuta
Akihiko Furuta 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: 10662516Abstract: Provided is a hot-dip Al—Zn—Mg—Si coated steel sheet having good corrosion resistance in flat parts and edge parts, and also having excellent worked part corrosion resistance. The hot-dip Al—Zn—Mg—Si coated steel sheet includes a base steel sheet and a hot-dip coating on a surface of the base steel sheet. The hot-dip coating includes an interfacial alloy layer present at an interface with the base steel sheet and a main layer present on the interfacial alloy layer, and contains from 25 mass % to 80 mass % of Al, from greater than 0.6 mass % to 15 mass % of Si, and from greater than 0.1 mass % to 25 mass % of Mg. The Mg content and Si content in the hot-dip coating satisfy formula (1): MMg/(MSi?0.6)>1.7??(1) where MMg represents the Mg content (mass %) and MSi represents the Si content (mass %).Type: GrantFiled: March 2, 2016Date of Patent: May 26, 2020Assignee: JFE STEEL CORPORATIONInventors: Toshihiko Ooi, Yohei Sato, Yoichi Tobiyama, Toshiyuki Okuma, Akihiko Furuta, Masahiro Yoshida, Yoshitsugu Suzuki, Satoru Ando, Akira Matsuzaki
-
Publication number: 20180051366Abstract: Provided is a hot-dip Al—Zn—Mg—Si coated steel sheet having good corrosion resistance in flat parts and edge parts, and also having excellent worked part corrosion resistance. The hot-dip Al—Zn—Mg—Si coated steel sheet includes a base steel sheet and a hot-dip coating on a surface of the base steel sheet. The hot-dip coating includes an interfacial alloy layer present at an interface with the base steel sheet and a main layer present on the interfacial alloy layer, and contains from 25 mass % to 80 mass % of Al, from greater than 0.6 mass % to 15 mass % of Si, and from greater than 0.1 mass % to 25 mass % of Mg. The Mg content and Si content in the hot-dip coating satisfy formula (1): MMg/(MSi?0.6)>1.7 ??(1) where MMg represents the Mg content (mass %) and MSi represents the Si content (mass %).Type: ApplicationFiled: March 2, 2016Publication date: February 22, 2018Applicant: JFE STEEL CORPORATIONInventors: Toshihiko OOI, Yohei SATO, Yoichi TOBIYAMA, Toshiyuki OKUMA, Akihiko FURUTA, Masahiro YOSHIDA, Yoshitsugu SUZUKI, Satoru ANDO, Akira MATSUZAKI
-
Publication number: 20150337428Abstract: A hot-dip Al—Zn alloy coated steel sheet having good corrosion resistance in flat parts as well as good workability and thereby has excellent corrosion resistance in worked parts. The upper layer of the hot-dip coating has a composition containing Al in an amount of 20 mass % to 95 mass %, Si in an amount of 10% or less of the Al content, at least one of Ca and Mg, the total content of Ca and Mg being 0.01 mass % to 10 mass %, and the balance including Zn and incidental impurities, and the mean Vickers hardness of the hot-dip coating is 50 Hv to 100 Hv.Type: ApplicationFiled: January 24, 2014Publication date: November 26, 2015Applicant: JFE STEEL CORPORATIONInventors: Toshihiko OOI, Toshiyuki OKUMA, Akihiko FURUTA, Masahiro YOSHIDA, Akira MATSUZAKI, Satoru ANDO
-
Patent number: 8962153Abstract: A hot-dip Zn—Al alloy coated steel sheet exhibiting a beautiful coating appearance with metallic luster, in which no spangle or very fine spangles are formed, and having excellent blackening resistance and a method for manufacturing the hot-dip Zn—Al alloy coated steel sheet are provided. The hot-dip Zn—Al alloy coated steel sheet includes a hot-dip Zn—Al alloy coating layer containing 1.0 to 10 percent by mass of Al, 0.2 to 1.0 percent by mass of Mg, 0.005 to 0.1 percent by mass of Ni, and the balance being Zn and incidental impurities on at least one surface of a steel sheet. The manufacturing method includes the steps of dipping the steel sheet into a hot-dip Zn—Al alloy coating bath and pulling up and cooling the steel sheet, wherein the steel sheet pulled up from the coating bath is cooled to 250° C. at a cooling rate of 1° C. to 15° C./sec.Type: GrantFiled: November 8, 2007Date of Patent: February 24, 2015Assignees: JFE Galvanizing & Coating Co., Ltd., JFE Steel CorporationInventors: Hideo Koumura, Akihiko Furuta, Yoshito Furuya, Hideo Ogishi, Susumu Sato, Rie Umebayashi, Satoru Ando, Shigeru Takano
-
Publication number: 20100086806Abstract: A hot-dip Zn—Al alloy coated steel sheet exhibiting a beautiful coating appearance with metallic luster, in which no spangle or very fine spangles are formed, and having excellent blackening resistance and a method for manufacturing the hot-dip Zn—Al alloy coated steel sheet are provided. The hot-dip Zn—Al alloy coated steel sheet includes a hot-dip Zn—Al alloy coating layer containing 1.0 to 10 percent by mass of Al, 0.2 to 1.0 percent by mass of Mg, 0.005 to 0.1 percent by mass of Ni, and the balance being Zn and incidental impurities on at least one surface of a steel sheet. The manufacturing method includes the steps of dipping the steel sheet into a hot-dip Zn—Al alloy coating bath and pulling up and cooling the steel sheet, wherein the steel sheet pulled up from the coating bath is cooled to 250° C. at a cooling rate of 1° C. to 15° C./sec.Type: ApplicationFiled: November 8, 2007Publication date: April 8, 2010Applicants: JFE Galvanizing & Coating Co., Ltd., JFE Steel CorporationInventors: Hideo Koumura, Akihiko Furuta, Yoshito Furuya, Hideo Ogishi, Susumu Sato, Rie Umebayashi, Satoru Ando, Shigeru Takano
-
Patent number: 7063889Abstract: [Problem] The object is to provide a resin film for metal sheet laminate which endures severe forming owing to excellent formability and impact resistance, and also to excellent adhesion after forming and heating, further gives stable performance independent of forming conditions, and also provides a laminated metal sheet, and a method for manufacturing the same. [Means for Resolution] The resin film for metal sheet laminate has a mixed resin in which a granular resin mainly existing in a state of grains having 0.1 to 5 ?m in diameter is dispersed in a polyester resin having a main basic skeleton of polyethylene terephthalate and/or isophthalic acid copolymerized polyethylene terephthalate, in a range from 3 to 30% by weight in entire resin. The granular resin is a modified polyolefin resin containing a functional group derived from carboxylic acid in a range from 2 to 20% by weight as carboxylic acid.Type: GrantFiled: September 18, 2003Date of Patent: June 20, 2006Assignee: JFE Steel CorporationInventors: Yasuhide Yoshida, Hiroki Iwasa, Hiroshi Kubo, Takeshi Suzuki, Akihiko Furuta, Keiji Sugawara, Masaaki Yamashita
-
Publication number: 20060083908Abstract: A resin film of a two-layer-construction comprising: (a) a resin layer R1 including a non-stretched resin film which contains a thermoplastic polyester resin containing 3 to 30 percent by weight in a weight fraction in the entire resin of a granular resin with a grain diameter of 0.1 to 5 ?m, the granular resin being a modified polyolefin resin containing 2 to 20 percent by weight of a functional group derived from carboxylic acid in terms of carboxylic acid, and (b) a polyester resin layer R0 containing at least one of polyethylene terephthalate and isophthalic acid copolymerized polyethylene terephthalate, as a basic skeleton, wherein the resin layer R1 and the resin layer R2 are laminated to each other.Type: ApplicationFiled: November 18, 2005Publication date: April 20, 2006Applicant: JFE STEEL CORPORATIONInventors: Yasuhide Yoshida, Hiroki Iwasa, Hiroshi Kubo, Takeshi Suzuki, Akihiko Furuta, Keiji Sugawara, Masaaki Yamashita
-
Publication number: 20050191483Abstract: [Problem] The object is to provide a resin film for metal sheet laminate which endures severe forming owing to excellent formability and impact resistance, and also to excellent adhesion after forming and heating, further gives stable performance independent of forming conditions, and also provides a laminated metal sheet, and a method for manufacturing the same. [Means for Resolution] The resin film for metal sheet laminate has a mixed resin in which a granular resin mainly existing in a state of grains having 0.1 to 5 ?m in diameter is dispersed in a polyester resin having a main basic skeleton of polyethylene terephthalate and/or isophthalic acid copolymerized polyethylene terephthalate, in a range from 3 to 30% by weight in entire resin. The granular resin is a modified polyolefin resin containing a functional group derived from carboxylic acid in a range from 2 to 20% by weight as carboxylic acid.Type: ApplicationFiled: September 18, 2003Publication date: September 1, 2005Applicant: JFE STEEL CORPORATIONInventors: Yasuhide Yoshida, Hiroki Iwasa, Hiroshi Kubo, Takeshi Suzuki, Akihiko Furuta, Keiji Sugawara, Masaaki Yamashita
-
Patent number: 6562474Abstract: A coated steel sheet having excellent corrosion resistance comprises: a zinc or a zinc alloy plated steel sheet or an aluminum or an aluminum alloy plated steel sheet; a composite oxide coating formed on the surface of the plated steel sheet; and an organic coating formed on the composite oxide coating. The composite oxide coating contains a fine particle oxide and a phosphoric acid and/or a phosphoric acid compound. The organic coating has thickness of from 0.1 to 5 &mgr;m.Type: GrantFiled: June 26, 2000Date of Patent: May 13, 2003Assignee: NKK CorporationInventors: Naoto Yoshimi, Satoru Ando, Masaru Sagiyama, Akihiko Furuta, Masaaki Yamashita, Akira Matsuzaki, Takafumi Yamaji, Tatsuya Miyoshi, Takahiro Kubota, Yasuhiko Haruta, Hiroyasu Matsuki, Kenichi Tomita
-
Patent number: 5456816Abstract: A method for manufacturing a nickel alloy electroplated cold-rolled steel sheet excellent in press-formability and phosphating-treatability, which comprises the steps of: (a) cold-rolling a hot-rolled steel sheet at a reduction ratio of from 60 to 85% to prepare a cold-rolled steel sheet consisting essentially of: up to 0.06 wt. % carbon, up to 0.5 wt. % silicon, up to 2.5 wt. % manganese, up to 0.1 wt. % phosphorus, up to 0.025 wt. % sulfur, up to 0.10 wt. % soluble aluminum, up to 0.05 wt. % nitrogen, and the balance being iron and incidental impurities; then, (b) subjecting the cold-rolled steel sheet to a continuous annealing treatment which comprises heating the cold-rolled steel sheet to a recrystallization temperature and then slowly cooling same; then, (c) forming, on at least one surface of the annealed cold-rolled steel sheet, a nickel alloy electroplating layer having a plating weight of from 5 to 60 mg/m.sup.Type: GrantFiled: April 28, 1994Date of Patent: October 10, 1995Assignee: NKK CorporationInventors: Toyofumi Watanabe, Akihiko Furuta, Tadashi Ono, Yoshinori Yomura, Shuichi Iwado
-
Patent number: 5336567Abstract: A nickel alloy electroplated cold-rolled steel sheet excellent in press-formability and phosphating-treatability, which comprises: (a) a cold-rolled steel sheet consisting essentially of: carbon (C): up to 0.06 wt. %, silicon (Si): up to 0.5 wt. %, manganese (Mn): up to 2.5 wt. %, phosphorus (P): up to 0.1 wt. %, sulfur (S): up to 0.025 wt. %, soluble aluminum (Sol.Al): up to 0.10 wt. %, nitrogen (N): up to 0.005 wt. %, and the balance being iron (Fe) and incidental impurities; (b) a nickel alloy electroplating layer, formed on at least one surface of the cold-rolled steel sheet, the nickel alloy electroplating layer consisting of nickel alloy particles precipitated at a distribution density of at least 1.times.10.sup.12 /m.sup.2, the nickel alloy particles containing at least one of phosphorus (P), boron (B) and sulfur (S) in an amount of 1 to 15 wt. %, the plating weight of the nickel alloy electroplating layer being 5 to 60 mg/m.sup.Type: GrantFiled: December 30, 1991Date of Patent: August 9, 1994Assignee: NKK CorporationInventors: Toyofumi Watanabe, Akihiko Furuta, Tadashi Ono, Yoshinori Yomura, Shuichi Iwado
-
Patent number: 4877497Abstract: An acidic aqueous electro-galvanizing solution consisting essentially of:Zinc chloride: from 100 to 400 g/l, at least one substance selected from the group consisting of ammonium chloride and potassium chloride: from 100 to 400 g/l, andat least one substance selected from the group consisting of saturated carboxylic acid,sodium salt thereof and potassium salt thereof: from 1 to 70 g/l.The above-mentioned electro-galvanizing solution permits manufacture of an electro-galvanized steel sheet having a satisfactory quality by largely inhibiting production of an anode sludge.Type: GrantFiled: November 18, 1988Date of Patent: October 31, 1989Assignee: NKK CorporationInventors: Tsutomu Watanabe, Akihiko Furuta