Patents by Inventor Shiro Fujii
Shiro Fujii 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: 20240141471Abstract: A method of forming an Al—Zn—Si—Mg alloy coating on a steel strip includes dipping steel strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on exposed surfaces of the steel strip. The method also includes controlling conditions in the molten coating bath and downstream of the coating bath so that there is a uniform Al/Zn ratio across the surface of the coating formed on the steel strip. An Al—Zn—Mg—Si coated steel strip includes a uniform Al/Zn ratio on the surface or the outermost 1-2 ?m of the Al—Zn—Si—Mg alloy coating.Type: ApplicationFiled: November 3, 2023Publication date: May 2, 2024Applicants: Bluescope Steel Limited, Nippon Steel Corporation, Nippon Steel Coated Sheet CorporationInventors: Wayne Andrew RENSHAW, Cat TU, Joe WILLIAMS, Jason HODGES, Shiro FUJII, Nobuyuki SHIMODA, Shuichi KONDO, Takashi HIRASAWA
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Publication number: 20220154321Abstract: A method of forming an Al—Zn—Si—Mg alloy coating on a steel strip includes dipping steel strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on exposed surfaces of the steel strip. The method also includes controlling conditions in the molten coating bath and downstream of the coating bath so that there is a uniform Al/Zn ratio across the surface of the coating formed on the steel strip. An Al—Zn—Mg—Si coated steel strip includes a uniform Al/Zn ratio on the surface or the outermost 1-2 ?m of the Al—Zn—Si—Mg alloy coating.Type: ApplicationFiled: October 25, 2021Publication date: May 19, 2022Inventors: Wayne Andrew Renshaw, Cat Tu, Joe Williams, Jason Hodges, Shiro Fujii, Nobuyuki Shimoda, Shuichi Kondo, Takashi Hirasawa
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Patent number: 11155911Abstract: A method of forming an Al—Zn—Si—Mg alloy coating on a steel strip includes dipping steel strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on exposed surfaces of the steel strip. The method also includes controlling conditions in the molten coating bath and downstream of the coating bath so that there is a uniform Al/Zn ratio across the surface of the coating formed on the steel strip. An Al—Zn—Mg—Si coated steel strip includes a uniform Al/Zn ratio on the surface or the outermost 1-2 ?m of the Al—Zn—Si—Mg alloy coating.Type: GrantFiled: March 6, 2014Date of Patent: October 26, 2021Assignees: Bluescope Steel Limited, Nippon Steel Corporation, Nippon Steel Coated Sheet CorporationInventors: Wayne Andrew Renshaw, Cat Tu, Joe Williams, Jason Hodges, Shiro Fujii, Nobuyuki Shimoda, Shuichi Kondo, Takashi Hirasawa
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Publication number: 20160273086Abstract: A method of forming an Al—Zn—Si—Mg alloy coating on a steel strip includes dipping steel strip into a bath of molten Al—Zn—Si—Mg alloy and forming a coating of the alloy on exposed surfaces of the steel strip. The method also includes controlling conditions in the molten coating bath and downstream of the coating bath so that there is a uniform Al/Zn ratio across the surface of the coating formed on the steel strip. An Al—Zn—Mg—Si coated steel strip includes a uniform Al/Zn ratio on the surface or the outermost 1-2 ?m of the Al—Zn—Si—Mg alloy coating.Type: ApplicationFiled: March 6, 2014Publication date: September 22, 2016Inventors: Wayne Andrew Renshaw, Cat Tu, Joe Williams, Jason Hodges, Shiro Fujii, Nobuyuki Shimoda, Shuichi Kondo, Takashi Hirasawa
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Patent number: 9080231Abstract: The present invention provides a hot-dipped steel 1 that demonstrates favorable corrosion resistance and formability, and has a favorable appearance of a plating layer. The hot-dipped steel of the present invention includes a steel substrate formed thereon with an aluminum-zinc alloy plating layer. The aluminum-zinc alloy plating layer contains Al, Zn, Si and Mg as constituent elements thereof and the Mg content is 0.1% to 10% by weight. The aluminum-zinc alloy plating layer contains 0.2% to 15% by volume of an Si—Mg phase, and the weight ratio of Mg in the Si—Mg phase to the total weight of Mg is 3% or more.Type: GrantFiled: February 17, 2011Date of Patent: July 14, 2015Assignees: NIPPON STEEL & SUMIKIN COATED SHEET CORPORATION, NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Shiro Fujii, Yoshikazu Yamanaka, Nobuki Shiragaki, Hiroshi Kanai, Nobuyuki Shimoda, Yasuhide Morimoto, Yoshihiro Suemune, Tooru Oohashi
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Publication number: 20130089672Abstract: A hot-dip Zn—Al alloy-plated steel material ensuring high corrosion resistance and excellent bending workability of the plating layer, and a production method thereof are provided, that is, a hot-dip Zn—Al alloy-plated steel material with excellent bending workability, having a plating layer comprising, in terms of mass %, from 25 to 85% of Al, from 0.05 to 5% of one or both of Cr and Mn, and Si in an amount of 0.5 to 10% of the Al content, with the balance being Zn and unavoidable impurities, wherein the average spangle size on the plating surface is 0.5 mm or more; and a production method thereof.Type: ApplicationFiled: November 29, 2012Publication date: April 11, 2013Applicant: Nippon Steel CorporationInventor: Shiro Fujii
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Publication number: 20120282488Abstract: The present invention provides a hot-dipped steel 1 that demonstrates favorable corrosion resistance and formability, and has a favorable appearance of a plating layer. The hot-dipped steel of the present invention includes a steel substrate formed thereon with an aluminum-zinc alloy plating layer. The aluminum-zinc alloy plating layer contains Al, Zn, Si and Mg as constituent elements thereof and the Mg content is 0.1% to 10% by weight. The aluminum-zinc alloy plating layer contains 0.2% to 15% by volume of an Si—Mg phase, and the weight ratio of Mg in the Si—Mg phase to the total weight of Mg is 3% or more.Type: ApplicationFiled: February 17, 2011Publication date: November 8, 2012Applicants: Nippon Steel Corporation, Nippon Steel & Sumikin Coated Sheet CorporationInventors: Shiro Fujii, Yoshikazu Yamanaka, Nobuki Shiragaki, Hiroshi Kanai, Nobuyuki Shimoda, Yasuhide Morimoto, Yoshihiro Suemune, Tooru Oohashi
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Publication number: 20090142616Abstract: A hot-dip Zn—Al alloy-plated steel material ensuring high corrosion resistance and excellent bending workability of the plating layer, and a production method thereof are provided, that is, a hot-dip Zn—Al alloy-plated steel material with excellent bending workability, having a plating layer comprising, in terms of mass %, from 25 to 85% of Al, from 0.05 to 5% of one or both of Cr and Mn, and Si in an amount of 0.5 to 10% of the Al content, with the balance being Zn and unavoidable impurities, wherein the average spangle size on the plating surface is 0.5 mm or more; and a production method thereof.Type: ApplicationFiled: September 1, 2005Publication date: June 4, 2009Inventor: Shiro Fujii
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Patent number: 5855696Abstract: The cold rolled steel sheet or galvanized steel sheet comprises by weight C: 0.0001 to 0.0026%, Si: not more than 1.2%, Mn: 0.03 to 3.0%, P: 0.015 to 0.15%, S: 0.0010 to 0.020%, Al: 0.005 to 0.1%, N: 0.0005 to 0.0080% and B: 0.0003 to 0.0030% with the balance consisting of Fe and unavoidable impurities. A process for producing the above steel sheet is also provided which comprises the steps of: performing hot roll finishing of a slab having the above chemical composition at the Ar.sub.3 transformation point or above; preferably, then cooling the hot rolled strip, within 1.5 sec after the completion of the hot rolling, to 750.degree. C. at a rate of not less than 50.degree. C./sec; coiling the strip in the temperature range of from room temperature to 750.degree. C.; cold rolling the coiled strip a reduction ratio of not less than 70%; subjecting the cold rolled strip to continuous annealing at 600.degree. to 900.degree. C.Type: GrantFiled: March 19, 1997Date of Patent: January 5, 1999Assignee: Nippon Steel CorporationInventors: Makoto Tezuka, Kohsaku Ushioda, Shiro Fujii, Atsushi Itami, Yasuharu Sakuma, Tatsuo Yokoi
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Patent number: 5230750Abstract: A chromating liquid for forming a chromate film on a Zn or Zn-alloy plated steel sheet, is prepared by adding and mixing a silane coupling agent in a molar ratio of from 0.05 to 0.3 relative to Cr.sup.6+ contained in an aqueous chromating liquid which contains 1-30 g/l of Cr.sup.6+ and 1-30 g/l of Cr.sup.3+ at a weight ratio of Cr.sup.6+ /Cr.sup.3+ ranging from 0.1 to 2.0; and further contains 1-59 g/l of hydrofluoric acid and 1-59 g/l of phosphoric acid at total of hydrofluoric acid and phosphoric acid ranging from 2 to 60 g/l and at a weight ratio of (fluoride ions+phosphate ions)/Cr.sup.3+ ranging from 0.5 to 3.5. and, further said chromating liquid is applied on a surface of the zinc-based plated steel sheet and is then dried, thereby forming the chromate film having a coating amount of from 10 to 150 mg/m.sup.2 in terms of the chromium.Type: GrantFiled: October 2, 1991Date of Patent: July 27, 1993Assignee: Nihon Parkerizing Co., Ltd.Inventors: Yoshio Shindou, Motoo Kabeya, Shiro Fujii, Makoto Yoshida, Teruaki Izaki, Takao Ogino, Arata Suda, Takayuki Aoki
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Patent number: 4770772Abstract: Apparatus has a rotary drum provided with a heating jacket therearound. The drum is mounted on a base pivotally supported on a pedestal. The base can be caused to take different orientations so as to enable the drum to take different attitudes. While the drum is in a vertical position, a mixture of fine particles and a liquid is supplied into the drum through a supply passage formed axially in a rotary shaft which extends into the drum rotatably and axially slidably relative to the drum. The mixture is filtered through a filter disposed in the drum. Filter liquid is discharged to the outside. The particles are prevented from passing through the filter and remain in the drum. Thereafter, the particles are heated and dried by a heating jacket on the drum while the drum is caused to assume a horizontal position and being rotated. The drum is then inclined such that the initially upwardly directed end thereof is directed obliquely downward.Type: GrantFiled: October 28, 1987Date of Patent: September 13, 1988Assignee: Nihon Schumacher Kabushiki KaishaInventors: Soichi Kuwajima, Shiro Fujii, Takeo Saeki