Patents by Inventor Yasuyoshi Hidaka

Yasuyoshi Hidaka 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).

  • Publication number: 20150321233
    Abstract: A piercing plug of the present invention includes: a plug body; a Ni—Cr layer formed on a surface of the plug body; and a sprayed coating formed on a surface of the Ni—Cr layer. The plug body contains, by mass %, 20 to 30% of Cr, 30 to 55% of Ni, 0.005 to 0.5% of C, 0.1 to 1.0% of Si, 0.2 to 1.5% of Mn, and at least one of Mo and W which satisfy a following conditional expression (A), and remainder including Fe and impurities. 1.5%?Mo+0.5 W?8.
    Type: Application
    Filed: July 16, 2013
    Publication date: November 12, 2015
    Inventors: Atsushi NOSAKA, Yasuyoshi HIDAKA, Yasuto HIGASHIDA, Ryuutarou OGATA
  • Publication number: 20150258591
    Abstract: A plug for hot tube-making includes: a plug main body; a build-up layer formed around an axis of the plug main body on a surface of the plug, main body, and a sprayed coating formed on a surface of the build-up layer.
    Type: Application
    Filed: December 16, 2013
    Publication date: September 17, 2015
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuto Higashida, Yasuyoshi Hidaka
  • Publication number: 20150184276
    Abstract: A method for producing a plug for use in a piercing-rolling mill for producing a seamless steel tube/pipe includes a step of carrying out shotblasting on a surface of the plug, and an arc-spraying step of performing arc-spraying of a spray wire to form a film on a surface of a base metal of the plug to which the shotblasting is applied. In the arc-spraying step, arc-spraying uses a cored wire whose iron sheath tube is filled with at least low-thermal conductive particles like ZrO2 particles, which have lower thermal conductivity than that of iron oxide among iron particles and low-thermal conductive particles, to form the film containing iron oxide, Fe and low-thermal conductive material. The formed film has enhanced insulation performance to produce the plug capable of ensuring the steady enhancement of the durability life of the plug during the piercing-rolling.
    Type: Application
    Filed: April 19, 2013
    Publication date: July 2, 2015
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichi Saitou, Yasuyoshi Hidaka, Yasuto Higashida
  • Publication number: 20150140208
    Abstract: It is an objective to provide a plug capable of enhancing a usage count of the plug, which is for use in a piercing machine for piercing-rolling a billet, and a regenerating method of the plug. The plug (10) is for use in a piercing machine (30) for piercing-rolling a billet (36). The plug (10) includes a body (18), a columnar portion (20), and a sprayed film (16). The body (18) has a maximum diameter at its rear end. The columnar portion (20) has the same diameter as the diameter of the rear end of the body (18), and extends from the rear end of the body (18). The sprayed film (16) is formed on a surface of the body (18) and on a surface of the columnar portion (20).
    Type: Application
    Filed: March 4, 2013
    Publication date: May 21, 2015
    Inventors: Yasuto Higashida, Yasuyoshi Hidaka, Kazuhiro Shimoda, Yosuke Tatebayashi
  • Publication number: 20150135513
    Abstract: Provided is a method for producing a plug for use in a piercing-rolling mill for producing a seamless steel tube/pipe, and the method for producing the plug for piercing-rolling comprises shotblasting a surface of the plug, and arc-spraying a spray wire so as to form a film on a surface of a base metal of the plug that is shotblasted. In the arc-spraying step, the arc spraying is carried out by using, as the spray wire, a cored wire whose iron sheath tube is charged with at least iron oxide particles among iron particles and the iron oxide particles (one or more of FeO particles, Fe3O4 particles, and Fe2O3 particles), so as to form the film containing iron oxide and Fe. Accordingly, it is possible to enhance the production efficiency of the plug, and to produce the plug for piercing-rolling capable of securing the steady enhancement of the durability life of the plug during the piercing-rolling.
    Type: Application
    Filed: March 19, 2013
    Publication date: May 21, 2015
    Inventors: Tomohiro Yamamoto, Yasuto Higashida, Yasuyoshi Hidaka
  • Publication number: 20150132501
    Abstract: A method for producing a plug for use in a piercing rolling mill for producing a seamless steel tube/pipe includes an arc-spraying step of melting iron wires, and spraying molten material thereof onto a surface of a base metal of a plug by use of an arc-spray gun, so as to form a film containing oxide and Fe on the surface of the base metal of the plug. In the arc-spraying step, the surface of the base metal of the plug is divided into plural sections along an axial direction of the plug, and in turn, the arc-spraying is separately carried out in each of the plural sections while an intersection angle between the center line of a spraying stream from the arc-spray gun and the surface of the plug base metal is maintained within a range of 35 degrees to 90 degrees.
    Type: Application
    Filed: March 19, 2013
    Publication date: May 14, 2015
    Inventors: Yasuto Higashida, Yasuyoshi Hidaka
  • Publication number: 20150125630
    Abstract: A plug for hot tube-making having a sprayed coating resistant to peeling is provided. A method for producing a plug for hot tube-making according to the present embodiment includes a step of preparing a plug whose surface includes a sprayed coating formed thereon, the sprayed coating containing iron and an iron oxide; and a heat treatment step during which the plug is kept at 400° C. to 550° C. for 5 to 60 minutes.
    Type: Application
    Filed: March 6, 2013
    Publication date: May 7, 2015
    Inventors: Yasuyoshi Hidaka, Yasuto Higashida, Kazuhiro Shimoda
  • Publication number: 20150075241
    Abstract: Provided is an equipment system for producing a piercing-rolling plug to be used for producing a seamless steel tube/pipe, which includes a shotblasting device for applying shotblasting on a surface of the plug, and an arc-spraying device for performing arc-spraying of iron wires on a surface of a base metal of the plug to which the shotblasting is applied, so as to form a film containing oxide and Fe thereon. The arc-spraying device includes plural spraying booths each of which separately forms part of the film in turn in each of sections into which the surface of the base metal of the plug is divided along an axial direction of the plug. The production efficiency of the plug can therefore be maintained at a high level, and steady enhancement of the durability life of the plug can be realized during the piercing-rolling.
    Type: Application
    Filed: March 19, 2013
    Publication date: March 19, 2015
    Inventors: Tomohiro Yamamoto, Yasuyoshi Hidaka, Yasuto Higashida
  • Publication number: 20150075243
    Abstract: To increase the life of a plug used in a piercing machine for piercing-rolling a billet. The plug (10) is used in a piercing machine (30) that piercing-rolls a billet (36). The plug (10) includes a plug body (12), a build-up layer (14), and a sprayed film (16). The build-up layer (14) is formed on a surface of the plug body (12). The sprayed film (16) covers at least an area ranging from the rear end of the build-up layer (14) to a position of the maximum outer diameter of the plug body (12).
    Type: Application
    Filed: March 26, 2013
    Publication date: March 19, 2015
    Inventors: Yasuyoshi Hidaka, Yasuto Higashida, Kazuhiro Shimoda
  • Publication number: 20150064454
    Abstract: There is provided a chromium-containing austenitic alloy wherein at least one surface of the surfaces of the alloy has a continuous chromium oxide film with a thickness of 5 nm or more and less than 50 nm. A maximum current density determined by a critical passivation current density method is 0.1 ?A/cm2 or less when the chromium oxide film is continuous. A chemical composition of a base metal preferably consists of, by mass percent, C: 0.15% or less, Si: 1.00% or less, Mn: 2.0% or less, P: 0.030% or less, S: 0.030% or less, Cr: 10.0 to 40.0%, Ni: 8.0 to 80.0%, Ti: 0.5% or less, Cu: 0.6% or less, Al: 0.5% or less, and N: 0.20% or less, the balance being Fe and impurities.
    Type: Application
    Filed: March 28, 2013
    Publication date: March 5, 2015
    Applicant: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Manabu Kanzaki, Yasuyoshi Hidaka, Yasuhiro Masaki, Akihiro Uehira, Osamu Miyahara
  • Patent number: 8863564
    Abstract: The present invention provides a lubricant composition for hot metal working which is capable of inhibiting generation of flaws on the surface of materials to be provided for hot metal working, and provides a method of hot metal working. The invention provides a lubricant composition for hot metal working comprising a plurality of glass frits respectively having different softening point from each other.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: October 21, 2014
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Kazutaka Asabe, Hirokazu Okada, Yasuyoshi Hidaka, Sumio Iida, Naoya Hirase, Kenji Takeuchi, Shuichi Akiyama
  • Patent number: 8846152
    Abstract: There is provided an antioxidant agent capable of preventing scale from being produced on the surface of a heated metallic starting material more effectively than the conventional antioxidant agent. The antioxidant agent according to the present invention contains a plurality of glass frits having different softening points and an inorganic compound having a melting point not higher than 600° C. The inorganic compound mainly softens in the low-temperature range of about 600° C. The plurality of glass frits mainly soften in the low-temperature range of about 600 to 1300° C. Therefore, the antioxidant agent covers the surface of metallic starting material in a broad temperature range, oxidizes the surface of metallic starting material, and prevents the production of scale.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: September 30, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue, Junichi Nishimori, Yasuyoshi Hidaka, Keishi Matsumoto, Takahisa Kato, Shuichi Akiyama
  • Patent number: 8815347
    Abstract: There is provided an antioxidant agent excellent in anti-dripping property and anti-peeling property. The antioxidant agent in accordance with the present invention contains a plurality of glass frits having different softening points, potter's clay, and bentonite and/or sepiolite. On account of the potter's clay, the antioxidant agent applied to the surface of a metallic starting material is less liable to drip down. Further, on account of the bentonite and/or sepiolite, the antioxidant agent is less liable to peel off the surface of the metallic starting material.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: August 26, 2014
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Kazuhiro Shimoda, Keishi Matsumoto, Yasuyoshi Hidaka, Tomio Yamakawa, Shuichi Akiyama, Takahisa Kato
  • Patent number: 8613817
    Abstract: The present invention is to provide a method for producing duplex stainless steel seamless pipe in which a duplex stainless steel billet can be inhibited from generating an oxide scale on the surface thereof during heating and the generation of outer surface flaw can also be prevented. The billet is heated in the a heating furnace for 1.5 hours or more and 4.0 hours or less at a heating temperature of 1250° C. or more and 1320° C. or less while regulating the average concentration of sulfur dioxide (SO2) gas in the atmosphere within the furnace to 0.01 volume % or less.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: December 24, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Naoya Hirase, Tetsuya Nakanishi, Kazuhiro Shimoda, Hirokazu Okada, Tomio Yamakawa, Yasuyoshi Hidaka
  • Patent number: 8544306
    Abstract: A plug includes a front edge portion having a convex curvature; a cylindrical portion having a truly or nearly cylindrical shape; a trunk portion having an outer diameter gradually increasing toward a rear edge thereof; a mandrel joint provided in a rear edge portion of the plug; a lubricant ejection hole running through the trunk portion from the mandrel joint that opens on the surface of the cylindrical portion; and a coating comprising oxides and Fe that is formed on the base metal surface of each of the front edge portion as well as the trunk portion by arc spraying using an iron wire. In this way, the plug can prevent inner surface flaws from occurring in a hollow blank that is deformed by piercing-rolling, and can extend its life without requiring a long time for making it.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: October 1, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Yasuto Higashida, Yasuyoshi Hidaka, Kazuhiro Shimoda, Tomio Yamakawa
  • Publication number: 20130202803
    Abstract: There is provided an antioxidant agent excellent in anti-dripping property and anti-peeling property. The antioxidant agent in accordance with the present invention contains a plurality of glass frits having different softening points, potter's clay, and bentonite and/or sepiolite. On account of the potter's clay, the antioxidant agent applied to the surface of a metallic starting material is less liable to drip down. Further, on account of the bentonite and/or sepiolite, the antioxidant agent is less liable to peel off the surface of the metallic starting material.
    Type: Application
    Filed: July 13, 2011
    Publication date: August 8, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kazuhiro Shimoda, Keishi Matsumoto, Yasuyoshi Hidaka, Tomio Yamakawa, Shuichi Akiyama, Takahisa Kato
  • Patent number: 8464568
    Abstract: A production method of a seamless pipe or tube according to the present invention comprises the steps of applying a lubricant containing carbon to a mandrel bar, producing a material pipe or tube with a mandrel mill using the mandrel bar to which the lubricant is applied, and reheating the material pipe or tube in a reheating furnace, wherein when a temperature of the material pipe or tube is 550° C. or higher and 1000° C. or lower in the reheating step, an oxidizing gas is fed into the material pipe or tube.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: June 18, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Kouji Nakaike, Yasuyoshi Hidaka, Hiroshi Nogami
  • Publication number: 20130115376
    Abstract: There is provided an antioxidant agent capable of preventing scale from being produced on the surface of a heated metallic starting material more effectively than the conventional antioxidant agent. The antioxidant agent according to the present invention contains a plurality of glass frits having different softening points and an inorganic compound having a melting point not higher than 600° C. The inorganic compound mainly softens in the low-temperature range of about 600° C. The plurality of glass frits mainly soften in the low-temperature range of about 600 to 1300° C. Therefore, the antioxidant agent covers the surface of metallic starting material in a broad temperature range, oxidizes the surface of metallic starting material, and prevents the production of scale.
    Type: Application
    Filed: July 13, 2011
    Publication date: May 9, 2013
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Koji Muramatsu, Yuji Inoue, Junichi Nishimori, Yasuyoshi Hidaka, Keishi Matsumoto, Takahisa Kato, Shuichi Akiyama
  • Patent number: 8307688
    Abstract: A process for producing seamless pipes which comprises conducting a piercing rolling step, a elongating rolling step using a mandrel bar, and a sizing rolling step and subsequently conducting a product heat treatment. In the process, when the carbon-equivalent weight, namely the sum of the weight of graphite in the lubricant and the carbon content in the organic binder, per unit area of the lubricant adhering to the mandrel bar surface in the above-mentioned step of elongating rolling is expressed by C (g/m2) or the maximum extent of carburization in the inner surface of the pipe to be heat-treated but prior to the heat treatment is expressed by ?C (% by mass), the heating temperature for the pipe to be heat-treated is expressed by T (° C.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: November 13, 2012
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yasuyoshi Hidaka, Toshihide Ono, Satoshi Matsumoto, Kouji Nakaike, Sumio Iida
  • Publication number: 20120210761
    Abstract: A plug includes a front edge portion having a convex curvature; a cylindrical portion having a truly or nearly cylindrical shape; a trunk portion having an outer diameter gradually increasing toward a rear edge thereof; a mandrel joint provided in a rear edge portion of the plug; a lubricant ejection hole running through the trunk portion from the mandrel joint that opens on the surface of the cylindrical portion; and a coating comprising oxides and Fe that is formed on the base metal surface of each of the front edge portion as well as the trunk portion by arc spraying using an iron wire. In this way, the plug can prevent inner surface flaws from occurring in a hollow blank that is deformed by piercing-rolling, and can extend its life without requiring a long time for making it.
    Type: Application
    Filed: August 18, 2011
    Publication date: August 23, 2012
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Yasuto Higashida, Yasuyoshi Hidaka, Kazuhiro Shimoda, Tomio Yamakawa