Patents Assigned to Hitachi Metals, Ltd.
  • Patent number: 11141791
    Abstract: An object of the invention is to provide: an alloy article that has excellent homogeneity in the alloy composition and microstructure as well as significant shape controllability, using an HEA with significant mechanical strength and high corrosion resistance; a method for manufacturing the alloy article; and a product using the alloy article. There is provided an alloy article comprising: Co, Cr, Fe, Ni, and Ti elements, each element in content of 5 to 35 atomic %; more than 0 atomic % to 8 atomic % of Mo %; and remainder substances of unavoidable impurities. And, ultrafine particles with an average diameter of 40 nm or less are dispersedly precipitated in matrix phase crystals of the alloy article.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: October 12, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Tadashi Fujieda, Mamoru Hirota, Kosuke Kuwabara, Kinya Aota, Takahiko Kato, Akihiko Chiba, Yuichiro Koizumi, Kenta Yamanaka, Seiichi Watanabe
  • Patent number: 11143318
    Abstract: In a diaphragm valve comprising a tubular valve seat, a primary side passage located outside the valve seat, a secondary side passage located inside the valve seat, and pressing member which presses the diaphragm to a seating surface to change a valve opening, a supporting member which contacts with the diaphragm in a valve opening range that is at least one part of an entire opening range from a fully opened state to a fully closed state to obstruct deformation of the diaphragm to the secondary side passage side is disposed in a region between the seating surface and a center of the seating surface. Thereby, even when a pressure difference between both sides of the diaphragm is large, a reduction of a gap at the seating surface can be prevented, and gas can be flowed at a large flow rate.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: October 12, 2021
    Assignee: Hitachi Metals, Ltd.
    Inventor: Takao Goto
  • Publication number: 20210313111
    Abstract: A magnetic core powder including granular powder A of Fe-based, magnetic, crystalline metal material and granular powder B of Fe-based, magnetic, amorphous metal material; the particle size d50A of granular powder A at a cumulative frequency of 50 volume % being 0.5 ?m or more and 7.0 ?m or less, and the particle size d50B of granular powder B at a cumulative frequency of 50 volume % being more than 15.0 ?m, in a cumulative distribution curve showing the relation between particle size and cumulative frequency from the smaller particle size side, determined by a laser diffraction method; the magnetic core powder meeting (d90M?d10M)/d50M of 1.6 or more and 6.0 or less, d10M being a particle size at a cumulative frequency of 10 volume %, d50M being a particle size at a cumulative frequency of 50 volume %, and d90M being a particle size at a cumulative frequency of 90 volume %.
    Type: Application
    Filed: August 22, 2019
    Publication date: October 7, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Tetsuro KATO, Nobuhiko CHIWATA, Motoki OHTA
  • Publication number: 20210308662
    Abstract: A ceramic honeycomb structure comprising large numbers of flow paths longitudinally formed by cell walls arranged in a lattice pattern in cross section, and an outer peripheral wall formed around the flow paths; in a cross section perpendicular to the longitudinal direction, fan-shaped bulges projecting in a fan shape toward the flow paths from cell wall intersections at which the cell walls are crossing; the circumscribed circles of circular portions of the fan-shaped bulges at all cell wall intersections having a constant radius; and when the distance between the center point of the circumscribed circle and the center point of the cell wall intersection is defined as a center point distance S, a center point distance So in the outer peripheral portion of the ceramic honeycomb structure and a center point distance Sc in the center portion meeting Sc<So.
    Type: Application
    Filed: August 28, 2019
    Publication date: October 7, 2021
    Applicant: HITACHI METALS, LTD.
    Inventor: Shinya KOJIMA
  • Publication number: 20210310144
    Abstract: A nickel-coated copper foil suitable for mass production, to which YAG laser welding can be applied while reducing the electrical resistivity by forming a nickel plating layer with a thickness of 0.5 ?m or less on a surface of a copper foil by Ni plating, is provided. The nickel-coated copper foil has an overall thickness of 200 ?m or less, and includes a copper layer made of Cu or a Cu alloy, and a nickel plating layer made of Ni or a Ni alloy, covering a surface of the copper foil, having a thickness of 0.01 ?m or more and 0.5 ?m or less, and including a surface having an a* value of 0 or more and 10 or less and a b* value of 0 or more and 14 or less in an L*a*b* color system obtained by an SCI measurement method in accordance with JIS Z 8722.
    Type: Application
    Filed: September 4, 2019
    Publication date: October 7, 2021
    Applicant: HITACHI METALS, LTD.
    Inventor: Ken ASADA
  • Publication number: 20210310097
    Abstract: A method of producing an amorphous alloy ribbon having a composition of Fe100-a-bBaSibCc (13.0 atom %?a?16.0 atom %, 2.5 atom %?b?5.0 atom %, 0.20 atom %?c?0.35 atom %, and 79.0 atom %?(100-a-b)?83.0 atom %) includes: preparing an alloy ribbon; and, in a state in which the alloy ribbon is tensioned with a tensile stress of from 5 MPa to 100 MPa, increasing a temperature of the alloy ribbon to from 410° C. to 480° C., at an average temperature increase rate of from 50° C./sec to less than 800° C./sec, and decreasing a temperature of the thus heated alloy ribbon to a temperature of a heat transfer medium for temperature-decreasing, at an average temperature decrease rate of from 120° C./sec to less than 600° C./sec, with performing the increase and decrease of temperature being performed by contacting the traveling alloy ribbon with a heat transfer medium.
    Type: Application
    Filed: July 3, 2018
    Publication date: October 7, 2021
    Applicants: HITACHI METALS, LTD., METGLAS INC.
    Inventors: Daichi AZUMA, Naoki ITO
  • Patent number: 11135642
    Abstract: A method for manufacturing a ring-rolled product, which manufactures the ring-rolled product from a ring material, includes a step of rolling the ring material, which has an operation of rolling the ring material from both inner and outer circumferential sides thereof between a mandrel roll and a main roll in a state of rotating the ring material toward one side in a circumferential direction thereof, and induction-heating the ring material by induction heating elements. An induction heating element is disposed on only an outer circumferential side of the ring material or is disposed on each of both the inner and outer circumferential sides in a region immediately before the rolling, or an inclined portion is provided in an outer-peripheral edge portion of a coil in the induction heating element.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: October 5, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Takuya Murai, Takanori Matsui, Yuji Ishiwari, Tomoyoshi Kiwake
  • Publication number: 20210304930
    Abstract: A sintered ferrite magnet having a composition of metal elements of Ca, R, A, Fe and Co, which is represented by the general formula of Ca1-x-yRxAyFe2n-zCoz, wherein R is at least one of rare earth elements indispensably including La; A is Sr and/or Ba; x, y, z and n represent the atomic ratios of Ca, R, A, Fe and Co; 2n represents a molar ratio expressed by 2n=(Fe+Co)/(Ca+R+A); and x, y, z and n meet the conditions of 0.15?x?0.35, 0.05?y?0.40, (1-x-y)>y, 0<z?0.18, and 7.5?(2n-z)<11.0.
    Type: Application
    Filed: February 9, 2021
    Publication date: September 30, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Yasuaki Tanioku, Yushi Yoshimitsu, Yoshinori Kobayashi
  • Publication number: 20210304959
    Abstract: [PROBLEM] To provide a wound magnetic core and a method for manufacturing a wound magnetic core permitting improvement of insulation between ribbon layers in a wound magnetic core at which soft magnetic metal ribbon has been wound to form an annular wound body. [SOLUTION MEANS] A nonmagnetic insulating metal oxide powder is made to adhere to a surface of a soft magnetic metal ribbon having an amorphous structure; this is wound in annular fashion and made into a wound body at which the metal oxide powder intervenes between ribbon layers; the wound body is made to undergo heat treatment in a nonoxidizing atmosphere; the wound body is thereafter subjected to treatment for formation of an oxide film in an oxidizing atmosphere adjusted to be at a temperature lower than that at the heat treatment to cause oxidation of the surface of the soft magnetic metal ribbon; and spaces between ribbon layers at the wound body are moreover impregnated with resin and curing is carried out to fuse the metal oxide powder thereto.
    Type: Application
    Filed: March 24, 2021
    Publication date: September 30, 2021
    Applicant: HITACHI METALS, LTD.
    Inventor: Tsugitomo NAKADA
  • Publication number: 20210292868
    Abstract: A martensitic stainless steel strip capable of achieving higher fatigue strength. This martensitic stainless steel strip has a martensite structure and has a thickness of 1 mm or less, and is characterized in that the compressive residual stress at a surface of the steel strip is 50 MPa or more and the areal ratio of carbides present in the metal structure of the steel strip is 0.5-8.0%. The compressive residual stress at a surface of the steel strip is preferably such that the compressive residual stress in a direction perpendicular to rolling is at least 50 MPa greater than the compressive residual stress in the direction of rolling.
    Type: Application
    Filed: July 10, 2019
    Publication date: September 23, 2021
    Applicant: HITACHI METALS, LTD.
    Inventor: Hiroyoshi FUJIHARA
  • Patent number: 11118248
    Abstract: Provided is a Cr alloy target material with which formation of craters on the surface of the Cr alloy target material during film formation can be limited and the adhesion of droplets on the material being treated can be limited. The Cr alloy target material is represented by an atom ratio composition formula of Cr100-x-yM1xM2y, wherein 0.1?x?21.0, 0.1?y?23.0, M1 is at least one kind of element selected from Ti and V, and M2 is at least one kind of element selected from Mo, Mn, B, W, Nb and Ta, with the balance being unavoidable impurities. The Cr alloy target material contains 10-1000 mass ppm of oxygen as an unavoidable impurity.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: September 14, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Koichi Sakamaki, Kazuya Saito, Hiroaki Sogame
  • Publication number: 20210280677
    Abstract: A SiC wafer including a SiC substrate and an epitaxial layer formed on the SiC substrate and containing SiC is provided, and a composition ratio of C—Si of an upper surface of the epitaxial layer is 50 atm % or less.
    Type: Application
    Filed: February 24, 2021
    Publication date: September 9, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Keisuke KOBAYASHI, Akio SHIMA
  • Publication number: 20210262071
    Abstract: The hot work tool steel or hot work tool contains, in mass %, 0.25 to 0.45% of C, 0.1 to 0.4% of Si, 0.5 to 0.9% of Mn, 0 to 0.6% of Ni, 4.9 to 5.5% of Cr, 1.3 to 2.3% of Mo or 1/2W by itself or 1.3 to 2.3% of (Mo+1/2W) in combination, 0.6 to 0.9% of V, and a balance of Fe and impurities, and value A and value B calculated by the following Formula 1 and Formula 2 satisfy that value A is 6.00 or more and value B is 1.00 or less. Value A=?0.7(% Si)+1.5(% Mn)+1.3(% Ni)+0.9(% Cr)+0.6(%(Mo+1/2W))+0.3(% V) ??Formula 1 Value B=1.9(% C)+0.043(% Si)+0.12(% Mn)+0.09(% Ni)+0.042(% Cr)+0.03(%(Mo+1/2W))?0.
    Type: Application
    Filed: May 9, 2019
    Publication date: August 26, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Yousuke NAKANO, Shiho FUKUMOTO, Kouta KATAOKA
  • Patent number: 11097347
    Abstract: A method of producing an atomized powder includes: an atomizing step of forming magnetic alloy particles from a molten metal by an atomizing method, to obtain a slurry in which the magnetic alloy particles are dispersed in an aqueous dispersion medium; a slurry concentration step of causing magnetic separation means to separate the magnetic alloy particles from the slurry to form a concentrated slurry having the magnetic alloy particles of more than 80% by mass, the magnetic separation means using a rotary drum including a magnetic circuit part fixedly disposed at a position where at least a part of the magnetic circuit part is immersed in the slurry and an outer sleeve capable of rotating outside the magnetic circuit part; and a drying step of causing drying means using an air flow dryer to dry the concentrated slurry to form a magnetic alloy powder.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: August 24, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Kazunori Nishimura, Shin Noguchi, Nobuaki Yoshioka
  • Patent number: 11098393
    Abstract: There are provided a very thin martensitic stainless steel foil and a manufacturing method thereof, which are capable of reducing shape defects and the like. A martensitic stainless steel foil of the present invention has a thickness of at most 35 ?m, and having a steepness of at most 0.75% when the steel foil has a length of 650 mm. Preferably, a metallographic structure in a cross-section of the steel foil is a ferrite structure, in which carbides are dispersed. More preferably, the steel foil consisting of, by mass, 0.25% to 1.5% C, 10% to 18% Cr, at most 1.0% Si (exclusive of 0%), at most 1.5% Mn (exclusive of 0%), at most 3.0% Mo (inclusive of 0%), and the balance of Fe with inevitable impurities.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: August 24, 2021
    Assignee: HITACHI METALS, LTD.
    Inventor: Takuya Okamoto
  • Patent number: 11097324
    Abstract: The present invention provides a metal strip coil that can suppress a shape failure at an end portion of the coil.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: August 24, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Thanh-Nghia Nguyen, Takuya Okamoto, Shinichiro Fukada
  • Publication number: 20210252439
    Abstract: A water-treating ceramic filter unit comprising a filter having pluralities of flow paths partitioned by porous ceramic cell walls and plugs alternately sealing the one-side or other-side ends of the flow paths; a housing containing the filter such that water to be treated is supplied from one end of the filter, and that the treated water is discharged from the other end of the filter; and seal members disposed on the outer edge portions of both end surfaces of the filter for longitudinally sandwiching and fixing the filter to the housing; the maximum of a gap between a side surface of the filter and the housing being equal to or less than the equivalent diameter of the flow paths.
    Type: Application
    Filed: June 12, 2019
    Publication date: August 19, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Yoshio KATAYAMA, Keiko NAKANO, Toshitaka ISHIZAWA
  • Publication number: 20210257327
    Abstract: An electrical connection member (1, 301, 401, 501, 601) includes a clad material (10, 110, 610) including at least both a first Cu layer (12) made of a Cu material and a low thermal expansion layer (11) made of an Fe material or Ni material having an average thermal expansion coefficient from room temperature to 300° C. smaller than that of the first Cu layer, the first Cu layer and the low thermal expansion layer being bonded to each other.
    Type: Application
    Filed: November 30, 2018
    Publication date: August 19, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Junya NISHINA, Masaaki ISHIO
  • Publication number: 20210257530
    Abstract: A thermoelectric conversion material includes a sintered body including a main phase including a plurality of crystal grains including Ce, Mn, Fe, and Sb and forming a skuttterudite structure, and a grain boundary between crystal grains adjacent to each other. The grain boundary includes a sintering aid phase including at least Mn, Sb, and O. Thus, with respect to a skutterudite-type thermoelectric conversion material including Sb, which is a sintering-resistant material, it is possible to improve sinterability while maintaining a practical dimensionless figure-of-merit ZT, and to reduce processing cost.
    Type: Application
    Filed: September 25, 2019
    Publication date: August 19, 2021
    Applicant: HITACHI METALS, LTD.
    Inventors: Michiko MATSUDA, Takeshi SHIMADA, Yoshihiro KAMITANI
  • Patent number: 11094434
    Abstract: An insulated wire includes a conductor including a copper material, and an insulation layer that is formed on an outer periphery of the conductor. A restoring temperature TB of the conductor is not more than 130° C. The restoring temperature TB is a temperature that is needed to restore a conductivity of the conductor after a coil processing to a conductivity of the conductor before the coil processing.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: August 17, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Hiromitsu Kuroda, Shohei Hata, Takayuki Tsuji, Keisuke Fujito