Patents Assigned to Nisshin Steel Co., Ltd.
  • Publication number: 20200071808
    Abstract: Provided is (i) a hot-dip Al-based alloy-coated steel sheet which includes a coated layer having a surface on which fine spangles are stably and sufficiently formed and which has a beautiful surface appearance due to the fine spangles thus formed on the surface of the coated layer, and (ii) a method of producing such a hot-dip Al-based alloy-coated steel sheet. The hot-dip Al-based alloy-coated steel sheet includes: a substrate steel sheet; and a hot-dip aluminum-based alloy coated layer which is formed on a surface of the substrate steel sheet and which contains boron at an average concentration of not less than 0.005 mass % and contains potassium at an average concentration of not less than 0.0004 mass %.
    Type: Application
    Filed: November 8, 2019
    Publication date: March 5, 2020
    Applicant: Nisshin Steel Co., Ltd.
    Inventors: Shinya Furukawa, Koutarou Ishii, Yasunori Hattori
  • Patent number: 10507489
    Abstract: The present invention provides a method for manufacturing a decorative construction plate, the method including subjecting a metal siding material including: a metallic substrate on which a recess-projection pattern having a height difference of 0.5 mm or more is formed and on which an ink receiving layer formed from a resin composition is provided; a core material; and a back-side material, to flame treatment by exposing the metal siding material to flame with an output of 250 kJ/h to 12000 kJ/h per 10-mm width of a flame port of a burner so that the surface temperature of the substrate does not exceed 300° C., followed by performing inkjet printing using an active ray curable ink.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: December 17, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Masaki Satou, Seiju Suzuki, Masaru Hiraku, Shuichi Sugita
  • Publication number: 20190244723
    Abstract: A composite twisted wire (1) which is obtained by twisting a plurality of strands. This composite twisted wire (1) includes: an aluminum-covered strand (2) that is obtained by forming a coating film (2b), which is formed of aluminum or an aluminum alloy, on the surface of a steel wire (2a); and an aluminum wire (3) that is formed of aluminum or an aluminum alloy. This composite twisted wire is reduced in weight, while exhibiting excellent tensile strength and excellent long-term stability with respect to electrical resistance. Consequently, this composite twisted wire is suitable, for example, for use as a wire harness of automobiles.
    Type: Application
    Filed: April 18, 2019
    Publication date: August 8, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Shinichi KAMOSHIDA, Tadaaki MIONO, Yasunori HATTORI
  • Patent number: 10370554
    Abstract: This coated metal sheet for exterior covering has a metal sheet and a top coating layer disposed on the metal sheet, the top coating layer is configured from a fluororesin and contains a gloss control agent comprising 0.01-15 vol % of microporous particles and a matte agent comprising primary particles, and the coated metal sheet satisfies the belowmentioned formulae. In the number-based particle size distribution of the gloss control agent and the matte agent, R is the number average particle size (?m) of the gloss control agent, D197.5 and D297.5 represent the 97.5% particle size (?m) of the gloss control agent and the matte agent, Ru is the upper limit particle size (?m) of the gloss control agent, and T is the top coating layer thickness (?m). D197.5/T?0.9 Ru?1.2T R?1.0 0.5?D297.5/T?7.0 3?T?40.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: August 6, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Taketo Hara, Koichiro Ueda, Kenji Sakato, Hiroki Yamaguchi
  • Publication number: 20190232352
    Abstract: A formed material manufacturing method according to present invention includes the steps of forming a convex formed portion by performing at least one forming process on a surface treated metal plate, and performing ironing on the formed portion using an ironing mold after forming the formed portion. The ironing mold includes a punch that is inserted into the formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface of the pushing hole extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Naofumi NAKAMURA, Yudai YAMAMOTO, Jun KUROBE
  • Publication number: 20190226044
    Abstract: A ferritic stainless steel sheet is a ferritic stainless steel sheet which is temper rolled after bright annealing and has a passivation film. The area ratio of minute defects having an area of 10 ?m2 or more on the surface of the steel sheet is 0.2% or more and 1.5% or less. In addition, the thickness of the passivation film is 1 nm or more and 10 nm or less, the average concentration of Si in the passivation film is 10 at % or more and 20 at % or less, and the average concentration ratio of Si, Al, Cr and Fe in the passivation film component is (Si+Al+Cr)/Fe>1.0.
    Type: Application
    Filed: December 13, 2016
    Publication date: July 25, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Takafumi KAWAGOE, Teruhiko SUETSUGU, Koji SETO
  • Publication number: 20190184492
    Abstract: A welded shaped steel manufacturing device includes: a plate conveying device configured to convey a web member and two flange members in a conveyance direction; and a laser welding device configured to laser-weld butt portions of ends of the web member butting against the two flange members for weld-bonding, wherein the plate conveying device includes a web member holding device having surface side rollers arranged at intervals in the conveyance direction in a position not to block laser irradiation from the laser welding device toward welding points, and wherein the web member is held with the surface side rollers over a predetermined range in the conveyance direction, and wherein side ends of the surface side rollers facing the two flange members are positioned along boundaries of areas having spatters dispersed from the welding points in a degree exceeding a predetermined value.
    Type: Application
    Filed: February 25, 2019
    Publication date: June 20, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Yasuhiro SAKURADA, Tooru IENARI, Hiroshi ASADA
  • Publication number: 20190176270
    Abstract: A laser cutting and machining method for plated steel plated, when irradiating a laser beam LB on to the upper surface of a plated steel plate W and laser cutting and machining same: a plating layer-containing metal that has been melted and/or evaporated by the irradiation of the laser beam LB is caused to flow on to a cut surface of the plated steel plate W as a result of assist gas that is jetted towards a laser machining units; and the plating layer-containing metal is coated on the cut surface.
    Type: Application
    Filed: May 17, 2017
    Publication date: June 13, 2019
    Applicants: AMADA HOLDINGS CO., LTD., NISSHIN STEEL CO., LTD.
    Inventors: Hideo HARA, Masahito ITO, Masanori UEHARA, Hiroshi ASADA, Hirokazu SASAKI, Hiroshi HORIKAWA
  • Patent number: 10293438
    Abstract: A welded shaped steel manufacturing device for weld-connecting a butt portion of a web member having an end butting perpendicularly against a flange member and thereafter correcting in shape the flange member subjected to thermal deformation caused by heat input during welding, the device includes: a corrective device including flange-member correcting rollers arranged for respective ends of the flange member, each configured to press each end on a web-member side of the flange member so as to correct the thermal deformation over a range of the flange member from each end thereof to the butt portion thereof against the web member, and web-member supporting rollers configured to support a web surface of the web member, wherein the flange-member correcting rollers arranged for the respective ends of the flange member apply independent pressures to the respective ends so as to correct the thermal deformation.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: May 21, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Hiroshi Asada, Yasuhiro Sakurada, Tooru Ienari
  • Patent number: 10287652
    Abstract: The purpose of the present invention is to provide a method for recovering calcium-containing solid components from steelmaking slag, with which it is possible to easily increase the calcium recovery rate. With the method, steelmaking slag is immersed in an aqueous solution containing carbon dioxide, and calcium in the steelmaking slag is made to leach out into the aqueous solution. Next, the immersed steelmaking slag is removed from the aqueous solution, and, subsequently, the pH of the aqueous solution is increased. When solid components precipitated by doing so are recovered, it is possible to recover solid components containing 20% or more by mass in terms of calcium atoms.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: May 14, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Yasushi Fukui, Akihiro Asaba, Shoichi Matsuo, Masaya Yamamoto
  • Publication number: 20190136359
    Abstract: Provided is a method for producing a molten aluminum-plated steel wire in which a steel wire (2) is immersed in a molten aluminum plating bath (1), the resulting molten aluminum-plated steel wire (3) is subsequently pulled up from the molten aluminum plating bath (1) and a stabilizing member (11) is brought into contact with the bath surface (10) of the molten aluminum plating bath (1) and the molten aluminum-plated steel wire (3) at the boundary between the molten aluminum-plated steel wire (3) and the bath surface (10) of the molten aluminum plating bath (1), a nozzle (12) for blowing an inert gas is arranged in a position facing the stabilizing member (11) with the molten aluminum-plated steel wire (3) therebetween, and an inert gas is blown from the tip (12a) of the nozzle (12) toward the boundary at a pressure of 0.1-20 kPa.
    Type: Application
    Filed: March 30, 2017
    Publication date: May 9, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Tadaaki MIONO, Shinichi KAMOSHIDA, Yasunori HATTORI
  • Publication number: 20190136358
    Abstract: A production method for molten-aluminum-plated copper wire, the production method being characterized by use of a heating device (6) that is for heating a copper wire (2) before the copper wire (2) is immersed in a molten aluminum plating bath (1) and of a bath surface control device (7) that comprises a tube-shaped body (9), which has a through hole (9a) for passing the copper wire (2) through the inside thereof, and includes an immersion region (9b) that is for immersion in the molten aluminum plating bath (1) from an end part of one end of the tube-shaped body (9) along the long direction of the tube-shaped body (9). The production method is also characterized in that the copper wire (2) is passed, in order, through the heating device (6) and the bath surface control device (7) and immersed in the molten aluminum plating bath (1) while the immersion region (9b) of the bath surface control device (7) is immersed in the molten aluminum plating bath (1).
    Type: Application
    Filed: March 7, 2017
    Publication date: May 9, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Tadaaki MIONO, Shinichi KAMOSHIDA, Yasunori HATTORI
  • Patent number: 10266910
    Abstract: A steel sheet hot-dip coated with a Zn—Al—Mg-based system, wherein the steel sheet material has a predetermined chemical composition; a Ti/C equivalent ratio represented by Formula (1) described in the specification is 0.4 to 1.5; a bainitic ferrite single phase or a phase including a bainitic ferrite phase and a ferrite phase exists as a main phase; the area ratio of a hard second phase and cementite is 3% or less; the ratio of small-angle boundaries with a difference in crystal orientation of 2° to 15° is 30% to 75%; and Ti-containing carbides having an average particle size of 20 nm or less are dispersed and precipitated and a method of manufacturing thereof.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: April 23, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Kentarou Hirata, Shinya Uesugi, Yukio Katagiri, Masaaki Uranaka, Tomoharu Shigetomi
  • Patent number: 10267747
    Abstract: A surface defect inspecting device for steel sheets includes: an illuminating unit configured to illuminate an imaging target portion on a surface of a steel sheet; first and second diffuse reflection light imaging units arranged at a first angle and at a second angle larger than the first angle with respect to a specular reflection direction of illuminated light reflected from the imaging target portion, respectively, imaging simultaneously reflection light of illuminated light reflected from the imaging target portion; and an image signal processor configured to process first and second diffuse reflection image signals acquired by the first and second diffuse reflection light imaging units, respectively, detecting, as a surface defect portion, a portion for which brightness level is lower than a first predetermined threshold in the first diffuse reflection image signal as well as higher than a second predetermined threshold in the second diffuse reflection image signal.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: April 23, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Keita Fukui, Syunsuke Shiga
  • Publication number: 20190112696
    Abstract: Provided is a method for producing a molten aluminum-plated steel wire in which a steel wire (2) is immersed in a molten aluminum plating bath (1), the resulting molten aluminum-plated steel wire (3) is subsequently pulled up from the molten aluminum plating bath (1) and a stabilizing member (11) is brought into contact with the bath surface (10) of the molten aluminum plating bath (1) and the molten aluminum-plated steel wire (3) at the boundary of the molten aluminum-plated steel wire (3) and the bath surface (10) of the molten aluminum plating bath (1), a nozzle (12) for blowing an inert gas is arranged in a position facing the stabilizing member (11) with the molten aluminum-plated steel wire (3) therebetween, and an inert gas having a temperature of 600-1000° C. is blown from the tip (12a) of the nozzle (12) toward the boundary at a pressure of 0.1-20 kPa.
    Type: Application
    Filed: March 30, 2017
    Publication date: April 18, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Tadaaki MIONO, Shinichi KAMOSHIDA, Yasunori HATTORI
  • Publication number: 20190106800
    Abstract: Disclosed is a connection component material that can be used, for example, for electrical contact components, such as connectors, lead frames, and harness plugs, used in electrical devices, electronic devices, etc. The connection component material comprises a Cu plating layer formed on a surface of a stainless steel plate, and a Sn plating layer formed on the Cu plating layer, the connection component material being characterized in that: the amount of adhesion of the Cu plating layer is from 1.5 to 45 g/m2; the amount of adhesion of the Sn plating layer is from 1.5 to 15 g/m2; and the surface hardness of the stainless steel plate is from 200 to 400 HV.
    Type: Application
    Filed: February 22, 2017
    Publication date: April 11, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Yoshikatsu NISHIDA, Masashi HIRAOKA, Masao NAGAO, Takahiro FUJII
  • Publication number: 20190106801
    Abstract: Disclosed is an automotive terminal that can be used, for example, as an electrical contact component, such as a connector, a lead frame, or a harness plug, used in an automobile. The automotive terminal comprises a Cu plating layer formed on a surface of a stainless steel plate, and a Sn plating layer formed on the Cu plating layer, the automotive terminal being characterized in that: the amount of adhesion of the Cu plating layer is from 1.5 to 45 g/m2; the amount of adhesion of the Sn plating layer is from 1.5 to 15 g/m2; and the surface hardness of the stainless steel plate is from 200 to 400 HV.
    Type: Application
    Filed: February 22, 2017
    Publication date: April 11, 2019
    Applicants: NISSHIN STEEL CO., LTD., YAZAKI CORPORATION
    Inventors: Yoshikatsu NISHIDA, Masashi HIRAOKA, Masao NAGAO, Takahiro FUJII, Takamichi KUDO
  • Patent number: 10253390
    Abstract: A method of making a cold-rolled steel plate has a chemical composition containing, on the basis of percent by mass, C from 0.03 to 0.12%, Si from 0 to 1.0%, Mn from 0.2 to 0.8%, P at 0.03% or less, S at 0.03% or less, and Al at 0.05% or less. The chemical composition further contains any one of Nb from 0.03 to 0.4% and V from 0.03 to 0.3%. These elements satisfy 5*C %?Si %+Mn %?1.5*Al %<1 within the aforementioned range of the corresponding content. A residue is formed of Fe and unavoidable impurities. An average diameter of particles of carbides containing any one of Nb, V and Ti as precipitates is from 20 to 100 nm. In this way, the chemical composition is regulated and the precipitates are dispersed finely and uniformly, thereby enhancing heat spot resistance and antiwear performance.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: April 9, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Satoshi Tagashira, Masahito Suzuki, Tomohiro Imanaka
  • Patent number: 10246764
    Abstract: Manufacturing a cold-rolled steel plate, having a steel slab having the chemical composition containing, on the basis of percent by mass, C from 0.03 to 0.08%, Si from 0 to 1.0%, Mn from 0.2 to 0.8%, P at 0.03% or less, S at 0.01% or less, and Al at 0.05% or less so as to satisfy the following: formula (1) and at least one of Nb from 0.03 to 0.4%, V from 0.01 to 0.3%, and Ti from 0.01 to 0.3% so as to satisfy the following formula (2), with a residue being formed of Fe and unavoidable impurities. The steel slab is heated to 1200° C. or more and hot rolled to form a hot-rolled steel plate, which is wound from 550 to 700° C. to form a hot-rolled coil, and the hot-rolled coil is cold rolled or annealed and cold rolled, obtaining cross-sectional hardness from 200 to 350 HV.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: April 2, 2019
    Assignee: NISSHIN STEEL CO., LTD.
    Inventors: Satoshi Tagashira, Masahito Suzuki, Tomohiro Imanaka
  • Publication number: 20190093192
    Abstract: A Ti-containing ferritic stainless steel sheet having a large gauge thickness and excellent toughness has a chemical composition containing, in terms of percentage by mass, from 0.003 to 0.030% of C, 2.0% or less of Si, 2.0% or less of Mn, 0.050% or less of P, 0.040% or less of S, from 10.0 to 19.0% of Cr, 0.030% or less of N, from 0.07 to 0.50% of Ti, from 0.010 to 0.20% of Al, from 0 to 1.50% of Mo, and from 0 to 0.0030% of B, the balance of Fe and unavoidable impurities. The steel has a K value defined by the following expression of 150 or more: K value=?0.07?Cr?6790?Free(C+N)?1.44?d+267, and having a sheet thickness of from 5.0 to 11.0 mm. Herein, Free(C+N) corresponds to the solid-dissolved (C+N) concentration (% by mass), and d represents an average crystal grain diameter (?m).
    Type: Application
    Filed: January 24, 2017
    Publication date: March 28, 2019
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Seiji MITSUNAGA, Nobuhisa EBIHAMA, Yasuhiro EHARA, Kazunari IMAKAWA