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).

  • Patent number: 8082768
    Abstract: A piercing and rolling plug has a film composed of oxides such as Fe3O4 and FeO and Fe (metal) as being formed on the surface of the base metal by electric arc spraying using an iron wire whose main component is Fe and, owing to this film, a plug excellent in heat-shielding and seizure-preventing effects can be realized and the lifetime of the plug can be prolonged. Further, in regenerating this plug, a film can be re-formed via the steps of shot blasting of the as-used plug in piercing and rolling and electric arc spraying in that order; thus, it is possible to regenerate the plug at low cost and in a short period of time.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: December 27, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yasuyoshi Hidaka, Kazuhiro Shimoda, Kouji Nakaike, Naoya Hirase, Yasuto Higashida, Takateru Inage, Jyun Nagakita, Masaharu Nakamori, Fumihito Yoshikawa, Yoshihiko Hayashi, Takayuki Aisaka
  • Patent number: 8065900
    Abstract: A plug material having a prescribed shape is prepared, the prepared plug material is thermally treated in a heat treatment atmosphere that contains at least 1.0 vol. % oxygen at a heat treatment temperature of at least 950° C. and less than 1050° C. and thus a plug having an oxide scale layer 30 on the surface is manufactured. According to the manufacturing method, pores PO that extend along the surface SF of the plug material are formed under outer scale layer 20 in the oxide scale layer 30, which allows cracks to be more easily propagated in the outer scale layer 20. Therefore, the outer scale layer 20 is more easily peeled off than the conventional one.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: November 29, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yasuyoshi Hidaka, Naoya Hirase, Yasuhiro Kouchi
  • Patent number: 8065901
    Abstract: A method for surface treating a mandrel bar used for hot rolling of high-alloy seamless steel pipe is provided. The method includes heat treating the mandrel bar to develop a scale, and after heat treatment, rolling ordinary steel comprising 8% or less of chromium for at least 50 passes. This achieves a mandrel bar for rolling high-alloy steel possessing both durability and superior resistance to seizure.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: November 29, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Sumio Iida, Yasuyoshi Hidaka, Mitsuru Yoshizawa, Koji Nakaike
  • Patent number: 8047039
    Abstract: A process for stainless-steel pipe production which comprises piercing rolling a raw material stainless steel containing, by mass, Cr: 10-30%, to give a hollow shell, elongating rolling the hollow shell using a mandrel bar, together with a graphite-free lubricant, to give a finishing rolling blank pipe and heating the blank pipe in a reheating furnace and subjecting the same to finishing rolling by sizing rolling to produce a hot-finished pipe, and then subjecting this pipe as a mother pipe to cold working to produce a stainless-steel pipe. In the reheating furnace, the finishing rolling blank pipe is heated to 1000° C. or more and subjected to heating in which an oxidizing gas is blown into the pipe inside, whereby a stainless-steel pipe which is inhibited from forming a carburized layer in the pipe inner surface can be produced. When the finishing rolling by sizing rolling to give a cold working mother pipe is carried out by stretch reducer rolling at 860-1050° C.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: November 1, 2011
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yasuyoshi Hidaka, Satoshi Matsumoto, Toshihide Ono, Kouji Nakaike, Sumio Iida, Hiroshi Nogami
  • Publication number: 20110239720
    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: Application
    Filed: March 20, 2007
    Publication date: October 6, 2011
    Inventors: Kouji Nakaike, Yasuyoshi Hidaka, Hiroshi Nogami
  • Publication number: 20100269868
    Abstract: It is an object of the present invention to provide a mandrel bar cleaning facility capable of effectively suppressing carburization generated on the inner surface of a pipe or tube while the pipe or tube is elongated and rolled without hindering an operation. A mandrel bar cleaning facility 15 of the present invention cleans a mandrel bar B which is pulled out of a mandrel bar conveying line after being used for elongating and rolling a pipe or tube in a mandrel mill 8. The mandrel bar cleaning facility 15 is provided with conveying devices 17, 18 that convey the mandrel bar B in the axial direction while revolving the mandrel bar B in the peripheral direction, and cleaning devices 1d that are arranged oppositely to the side of the mandrel bar B conveyed by the conveying devices 17, 18, and jet high-pressure water having a water pressure of 0.2 to 150 MPa (preferably, 20 to 150 MPa) toward the outer surface of the mandrel bar B.
    Type: Application
    Filed: August 6, 2007
    Publication date: October 28, 2010
    Applicant: Sumitomo Metal Industries, Ltd.
    Inventors: Kouji Nakaike, Yasuyoshi Hidaka, Sumio Iida
  • Publication number: 20100050723
    Abstract: A piercing and rolling plug has a film composed of oxides such as Fe3O4 and FeO and Fe (metal) as being formed on the surface of the base metal by electric arc spraying using an iron wire whose main component is Fe and, owing to this film, a plug excellent in heat-shielding and seizure-preventing effects can be realized and the lifetime of the plug can be prolonged. Further, in regenerating this plug, a film can be re-formed via the steps of shot blasting of the as-used plug in piercing and rolling and electric arc spraying in that order; thus, it is possible to regenerate the plug at low cost and in a short period of time.
    Type: Application
    Filed: June 24, 2009
    Publication date: March 4, 2010
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Yasuyoshi Hidaka, Kazuhiro Shimoda, Kouji Nakaike, Naoya Hirase, Yasuto Higashida, Takateru Inage, Jyun Nagakita, Masaharu Nakamori, Fumihito Yoshikawa, Yoshihiko Hayashi, Takayuki Aisaka
  • Publication number: 20100018281
    Abstract: A plug material having a prescribed shape is prepared, the prepared plug material is thermally treated in a heat treatment atmosphere that contains at least 1.0 vol. % oxygen at a heat treatment temperature of at least 950° C. and less than 1050° C. and thus a plug having an oxide scale layer 30 on the surface is manufactured. According to the manufacturing method, pores PO that extend along the surface SF of the plug material are formed under outer scale layer 20 in the oxide scale layer 30, which allows cracks to be more easily propagated in the outer scale layer 20. Therefore, the outer scale layer 20 is more easily peeled off than the conventional one.
    Type: Application
    Filed: July 31, 2009
    Publication date: January 28, 2010
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: YASUYOSHI HIDAKA, Naoya Hirase, Yasuhiro Kouchi
  • Publication number: 20090301151
    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: Application
    Filed: March 29, 2007
    Publication date: December 10, 2009
    Applicant: Sumitomo Metal Industries, Ltd.
    Inventors: Kazuhiro Shimoda, Tomio Yamakawa, Kazutaka Asabe, Hirokazu Okada, Yasuyoshi Hidaka, Sumio Iida, Naoya Hirase, Kenji Takeuchi, Suichi Akiyama
  • Publication number: 20090218014
    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: Application
    Filed: March 23, 2007
    Publication date: September 3, 2009
    Inventors: Naoya Hirase, Tetsuya Nakanishi, Kazuhiro Shimoda, Hirokazu Okada, Tomio Yamakawa, Yasuyoshi Hidaka
  • Publication number: 20090084151
    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: Application
    Filed: October 27, 2008
    Publication date: April 2, 2009
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Yasuyoshi Hidaka, Toshihide Ono, Satoshi Matsumoto, Kouji Nakaike, Sumio Iida
  • Publication number: 20090071221
    Abstract: A method for surface treating a mandrel bar used for hot rolling of high-alloy seamless steel pipe is provided. The method includes heat treating the mandrel bar to develop a scale, and after heat treatment, rolling ordinary steel comprising 8% or less of chromium for at least 50 passes.
    Type: Application
    Filed: September 24, 2008
    Publication date: March 19, 2009
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Sumio Iida, Yasuyoshi Hidaka, Mitsuru Yoshizawa, Koji Nakaike
  • Publication number: 20090064749
    Abstract: A process for stainless-steel pipe production which comprises piercing rolling a raw material stainless steel containing, by mass, Cr: 10-30%, to give a hollow shell, elongating rolling the hollow shell using a mandrel bar, together with a graphite-free lubricant, to give a finishing rolling blank pipe and heating the blank pipe in a reheating furnace and subjecting the same to finishing rolling by sizing rolling to produce a hot-finished pipe, and then subjecting this pipe as a mother pipe to cold working to produce a stainless-steel pipe. In the reheating furnace, the finishing rolling blank pipe is heated to 1000° C. or more and subjected to heating in which an oxidizing gas is blown into the pipe inside, whereby a stainless-steel pipe which is inhibited from forming a carburized layer in the pipe inner surface can be produced. When the finishing rolling by sizing rolling to give a cold working mother pipe is carried out by stretch reducer rolling at 860-1050° C.
    Type: Application
    Filed: October 8, 2008
    Publication date: March 12, 2009
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: YASUYOSHI HIDAKA, Satoshi Matsumoto, Toshihide Ono, Kouji Nakaike, Sumio Iida, Hiroshi Nogami
  • Patent number: 7469565
    Abstract: A seamless tube is manufactured while effectively suppressing the occurrence of carburization in the seamless tube without interfering with operations. A seamless tube is manufactured by a step of washing at least a portion of a conveyor installed in a conveying step of a mandrel bar B which is situated from a lubricant applying device 7 to the entrance of a mandrel mill 8, a step of washing, on the upstream side of the lubricant applying device 7, a mandrel bar B which was used for elongation rolling, and a step of applying a non-graphite-based lubricant to the mandrel bar B with the lubricant applying device 7, wherein the conveyor and the mandrel bar B are each washed such that the amount of graphite C2 (g/m2) adhering to the surface of the mandrel bar B before it is provided to elongation rolling and the amount of carbon C1 (g/m2) contained in the organic binder of the applied lubricant satisfy Equation 1: 0.08×C1+0.05×C2?3 and Equation 2: 3?C1+C2?50.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: December 30, 2008
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kouji Nakaike, Yasuyoshi Hidaka, Sumio Iida, Hiroki Kusuda, Masami Sakiyama
  • Publication number: 20080083254
    Abstract: A seamless tube is manufactured while effectively suppressing the occurrence of carburization in the seamless tube without interfering with operations. A seamless tube is manufactured by a step of washing at least a portion of a conveyor installed in a conveying step of a mandrel bar B which is situated from a lubricant applying device 7 to the entrance of a mandrel mill 8, a step of washing, on the upstream side of the lubricant applying device 7, a mandrel bar B which was used for elongation rolling, and a step of applying a non-graphite-based lubricant to the mandrel bar B with the lubricant applying device 7, wherein the conveyor and the mandrel bar B are each washed such that the amount of graphite C2 (g/m2) adhering to the surface of the mandrel bar B before it is provided to elongation rolling and the amount of carbon C1 (g/m2) contained in the organic binder of the applied lubricant satisfy Equation 1: 0.08×C1+0.05×C2?3 and Equation 2: 3?C1+C2?50.
    Type: Application
    Filed: August 22, 2007
    Publication date: April 10, 2008
    Inventors: Kouji Nakaike, Yasuyoshi Hidaka, Sumio Iida, Hiroki Kusuda, Masami Sakiyama
  • Patent number: 6440234
    Abstract: A martensitic stainless steel product having a chromium content of 9 to 15% by weight and a surface from which mill scales generated during production are removed by a shot blasting. The surface satisfies that, when a color image of the surface taken with 640×480 pixels is analyzed on blue color and a histogram of the pixel numbers and the tones divided into 0 to 255 classes is obtained, a relationship between the maximum frequency Yp and the tone value Xp at which Yp is counted satisfies an inequality, 800Xp−Yp−27000>0. This steel product is superior in weatherability under atmospheric environments, and also superior in sulfide stress cracking resistance under environments containing hydro-sulfide.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: August 27, 2002
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Hisashi Amaya, Toshiro Anraku, Yasuyoshi Hidaka
  • Patent number: 6210806
    Abstract: The martensitic stainless steel product comprises a base steel and a dual oxide scale layer on a surface of the steel, wherein the dual scale layer includes an inner scale layer containing FeCr2O4 and Fe3O4 as main components and an outer scale layer containing Fe3O4 as a main component and having an outermost Fe2O3 layer; or includes an inner scale layer containing FeCr2O4 and FeO as main components and an outer scale layer containing FeO and Fe3O4 as main components and having an outermost Fe2O3 layer. If the product is a steel pipe, it exhibits excellent corrosion resistance when used for an oil country tubular goods or line pipe.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: April 3, 2001
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yasuyoshi Hidaka, Toshiro Anraku, Hisashi Amaya