Patents Assigned to Daido Steel Co., Ltd.
  • Patent number: 11913100
    Abstract: The present invention relates to a steel for a mold, including 0.070?C?0.130 mass %, 0.01?Si?0.60 mass %, 0.02?Mn?0.60 mass %, 0.003?P?0.150 mass %, 0.005?Cu?1.50 mass %, 0.005?Ni?0.80 mass %, 7.50?Cr?8.40 mass %, 0.70?Mo?1.20 mass %, 0.01?V?0.30 mass %, 0.010?Al?0.120 mass %, and 0.015?N?0.095 mass %, with the balance being Fe and unavoidable impurities. The steel for a mold according to the present invention satisfies all of 6 properties of SA property, tempering hardness, residual stress, machinability, impact value and corrosion resistance.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: February 27, 2024
    Assignee: DAIDO STEEL CO., LTD.
    Inventor: Masamichi Kawano
  • Patent number: 11884999
    Abstract: The present invention relates to a Fe-based alloy for melt-solidification-shaping containing: 0.05 mass %?C?0.25 mass %, 0.01 mass %?Si?2.0 mass %, 0.05 mass %?Mn?2.5 mass %, 2.5 mass %?Ni?9.0 mass %, 0.1 mass %?Cr?8.0 mass %, and 0.005 mass %?N?0.200 mass %, with the balance being Fe and unavoidable impurities, and satisfying: 11.5<15C+Mn+0.5Cr+Ni<20.
    Type: Grant
    Filed: November 8, 2022
    Date of Patent: January 30, 2024
    Assignee: DAIDO STEEL CO., LTD.
    Inventor: Takashi Yoshimoto
  • Patent number: 11862787
    Abstract: The present invention relates to a negative electrode active material for a lithium-ion battery, containing a Si phase, a Si—Zr compound phase, and a Sn—X compound phase in which X is at least one element selected from the group consisting of Cu, Ti, Co, Fe, Ni, and Zr, the Sn—X compound phase has a proportion of 0.1 mass % to 18 mass % to the whole, and the Si phase has a proportion of 10 mass % to 80 mass % to the whole.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: January 2, 2024
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Yuta Kimura, Hiroyuki Miyamoto
  • Patent number: 11846009
    Abstract: The present invention relates to a hard particle powder for a sintered body, the powder including, in terms of mass %, 0.01?C?1.0, 2.5?Si?3.3, 0.1?Ni?20.0, 5.0?Cr?15.0, and 35.0?Mo?45.0, with the balance being Fe and inevitable impurities, in which the powder before performing sintering comprises an alloy phase comprising a hexagonal crystal structure of C14 type Laves phase.
    Type: Grant
    Filed: July 15, 2022
    Date of Patent: December 19, 2023
    Assignees: DAIDO STEEL CO., LTD., NIPPON PISTON RING CO., LTD.
    Inventors: Iwane Nagase, Fumito Mizuno, Yuji Nagaoka, Satoshi Ikemi, Katsuaki Sato
  • Patent number: 11834737
    Abstract: The titanium alloy coating film of the present invention is represented by (Ti1-aMoa)1-xNx, which satisfies 0.0423 a?0.32 and 0.40?x?0.60 and in which the film hardness thereof satisfies at least a condition of 3,000 HV or more; and the titanium alloy target material is represented by Ti1-aMoa, which satisfies 0.04?a?0.32, and in which, when an X-ray diffraction profile is measured on a surface of the target material, a diffraction peak intensity attributed to a single metal phase of Mo is not detected.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: December 5, 2023
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Hiromasa Takeda, Wataru Araki, Kazuya Sakaguchi, Katsuko Ofuji, Jun Totsuka, Kazuki Minami
  • Patent number: 11807921
    Abstract: The present invention relates to a metal powder including 0.1?C?0.4 mass %, 0.005?Si?1.5 mass %, 0.3?Mn?8.0 mass %, 2.0?Cr?15.0 mass %, 2.0?Ni?10.0 mass %, 0.1?Mo?3.0 mass %, 0.1?V?2.0 mass %, 0.010?N?0.200 mass %, and 0.01?Al?4.0 mass %, with the balance being Fe and unavoidable impurities, and satisfying the following expression (1), 10<15[C]+[Mn]+0.5[Cr]+[Ni]<20 (1), in which [C], [Mn], [Cr] and [Ni] respectively represent the contents of C, Mn, Cr and Ni by mass %.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: November 7, 2023
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Takashi Yoshimoto, Shinnosuke Yamada, Koichiro Inoue
  • Patent number: 11742121
    Abstract: An Sm—Fe—N magnet material includes from 7.0 at % to 12 at % of Sm, from 0.1 at % to 1.5 at % of at least one element selected from the group consisting of Hf and Zr, from 0.05 at % to 0.5 at % of C, from 10 at % to 20 at % of N, and from 0 at % to 35 at % of Co, with a remainder being Fe and unavoidable impurities.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: August 29, 2023
    Assignee: DAIDO STEEL CO., LTD.
    Inventor: Iwao Sakazaki
  • Patent number: 11735341
    Abstract: The present invention relates to an R-T-B-based sintered magnet including: a rare earth element R; a metal element T which is Fe, or includes Fe and Co with which a part of Fe is substituted; boron; and a boride forming element M which is a metal element other than rare earth elements and the metal element T and forms a boride, in which the R-T-B-based sintered magnet includes: a main phase which includes a crystal grain of an R-T-B-based alloy; and a boride phase which includes a compound phase based on the boride of the boride forming element M, and is generated on a preferential growth plane of the crystal grain of the main phase.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: August 22, 2023
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Michihide Nakamura, Masaru Itakura
  • Patent number: 11732331
    Abstract: The present invention relates to an Ni-based alloy which is excellent in terms of wear resistance and high-temperature corrosion resistance and which includes 0.3?C?1.0 mass %, 36.0?Cr?50.0 mass %, and 3.0?Al?7.0 mass %, with the balance being Ni and unavoidable impurities, and relates to an Ni-based alloy product made of the Ni-based alloy according to the present invention, and methods for producing the Ni-based alloy product.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: August 22, 2023
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Kenji Sugiyama, Masashi Nagaya, Yusuke Kusafuka, Yoshihiko Koyanagi, Hiroyuki Takabayashi
  • Patent number: 11535917
    Abstract: The present invention relates to a steel for mold, containing: 0.28 mass %?C?0.65 mass %, 0.01 mass %?Si?0.30 mass %, 1.5 mass %?Mn?3.0 mass %, 0.5 mass %?Cr?1.4 mass %, 1.9 mass %?Mo+W/2?4.0 mass %, 0.2 mass %?V?1.0 mass %, and 0.01?N?0.10 mass %, with the balance being Fe and inevitable impurities, in which, in a state after quenching and tempering, the steel has: a (Mo, W) carbide having a diameter of 0.2 ?m or less being in an amount of 1.2 mass % or more, a ratio (mass ratio) of the amount of the (Mo, W) carbide to an amount of a Cr carbide being 11 or more, and a hardness change of 15 HRC or less.
    Type: Grant
    Filed: November 19, 2020
    Date of Patent: December 27, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Naoki Umemori, Shigeki Higuchi
  • Patent number: 11527340
    Abstract: The present invention relates to an RFeB-based sintered magnet having a composition including: 24-31% by mass of at least one element selected from the group consisting of Nd, Pr, La and Ce; 0.1-6.5% by mass of at least one element selected from the group consisting of Dy and Tb; 0.8-1.4% by mass of B; 0.03-0.2% by mass of at least one element selected from the group consisting of Zr, Ti, Hf and Nb; 0.8-5.5% by mass of Co; 0.1-1.0% by mass of Cu; and 0.1-1.0% by mass of Al, with a remainder being Fe and unavoidable impurities, in which the composition has a total content of Cu and Al being higher than 0.5% by mass.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: December 13, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventor: Michihide Nakamura
  • Patent number: 11482355
    Abstract: The present invention relates to a soft magnetic alloy containing: Ni, and at least one element selected from the group consisting of Al, Si and V, with the balance being Fe and inevitable impurities, in which, when the content of Ni and the total content of Al, Si and V are expressed by [Ni] and [M], respectively in mass %, and a relationship between [Ni] and [M] is plotted, the coordinate ([Ni], [M]) is present in a region surrounded by the straight lines A, B, C, D, and E.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: October 25, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Akihiko Saito, Takeshi Takano, Yu Nakama
  • Patent number: 11377718
    Abstract: The present invention relates to a steel for a mold, having a composition containing, in mass %, 0.045?C?0.090, 0.01?Si?0.50, 0.10?Mn?0.60, 0.80?Ni?1.10, 6.60?Cr?8.60, 0.01?Mo?0.70, 0.001?V?0.200, 0.007?Al?0.150, and 0.0002?N?0.0500, with the balance being Fe and unavoidable impurities.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: July 5, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventor: Masamichi Kawano
  • Patent number: 11333265
    Abstract: An electromagnetic valve used in a fuel system, in which at least a portion of a member constituting an magnetic circuit in an electromagnetic drive unit includes 0.15-0.45 mass % (inclusive) Ni, 0.65-1.0 mass % (inclusive) Al, 9.2-10.3 mass % (inclusive) Cr, and 0.90-1.6 mass % (inclusive) Mo, and the remainder comprises an alloy material comprising Fe and unavoidable impurities. The alloy material may further include 0.05-0.15 mass % (inclusive) Pb.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: May 17, 2022
    Assignees: DAIDO STEEL CO., LTD., DENSO CORPORATION
    Inventors: Akihiko Saito, Takeshi Takano, Yu Nakama, Satoshi Doi, Takeshi Senoo, Tetsuya Aoki, Masatsune Ozawa, Makoto Saizen
  • Patent number: 11328845
    Abstract: The present invention relates to an RFeB-based magnet in which a treatment (grain boundary diffusion treatment) for diffusing atoms of the heavy rare earth element RH is performed in a base material including an RLFeB-based sintered magnet obtained by subjecting crystal grains in a raw-material powder including a powder of an RLFeB-based alloy containing the light rare earth element RL, Fe and B to orientation in a magnetic field and then sintering the oriented raw-material powder, or an RLFeB-based hot-deformed magnet obtained by subjecting the same raw-material powder to hot pressing and then to hot deforming to thereby orient the crystal grains in the raw-material powder, and a method for producing the RFeB-based magnet.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: May 10, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Jumpei Hinata, Hayato Hashino, Fumiya Kitanishi, Kazuya Gomi, Kazumasa Fujimura
  • Patent number: 11319621
    Abstract: The present invention relates to a steel for a mold, which has a composition containing, on % by mass basis: 0.35%?C?0.40%, 0.003%?Si?0.20%, 0.72%?Mn?0.94%, 5.65%?Cr?6.00%, 1.65%?Mo?2.00%, 0.71%?V?0.90%, and 0.001%?N?0.080%, with the balance being Fe and inevitable impurities.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: May 3, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventor: Masamichi Kawano
  • Patent number: 11295880
    Abstract: The present invention relates to an RFeB-based magnet in which a treatment (grain boundary diffusion treatment) for diffusing atoms of the heavy rare earth element RH is performed in a base material including an RLFeB-based sintered magnet obtained by subjecting crystal grains in a raw-material powder including a powder of an RLFeB-based alloy containing the light rare earth element RL, Fe and B to orientation in a magnetic field and then sintering the oriented raw-material powder, or an RLFeB-based hot-deformed magnet obtained by subjecting the same raw-material powder to hot pressing and then to hot deforming to thereby orient the crystal grains in the raw-material powder, and a method for producing the RFeB-based magnet.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: April 5, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventors: Jumpei Hinata, Hayato Hashino, Fumiya Kitanishi, Kazuya Gomi, Kazumasa Fujimura
  • Patent number: 11274354
    Abstract: The present invention provides a steel material which is excellent in both of the strength (particularly, fatigue strength) and the manufacturability (particularly, bending straightening properties), and thus can be used as an automobile component such as a crankshaft by being formed into a product shape, being subjected to a high strength treatment such as a nitrocarburizing treatment, and then being subjected to the bending straightening.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: March 15, 2022
    Assignees: DAIDO STEEL CO., LTD., HONDA MOTOR CO., LTD.
    Inventors: Ryosuke Ohashi, Ayumi Yamazaki, Yushi Fujinaga, Kentaro Shimada, Ryuta Motani
  • Patent number: 11268572
    Abstract: A rolling-sliding member that is high in hardness and continues to have a passivation film reliably even after being subjected to a process that does not require any processing for removal of scale, etc., as well as a rolling bearing using the same and a method for manufacturing the rolling-sliding member.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: March 8, 2022
    Assignees: JTEKT CORPORATION, DAIDO STEEL CO., LTD.
    Inventors: Nao Inazaki, Fumihiro Furukawa, Kanji Kawasaki, Hisato Nishisaka, Tomoya Hattori, Kazuhisa Kitamura, Yusuke Kusafuka, Keita Hinoshita, Hiroyuki Takabayashi, Kazuhisa Ishida
  • Patent number: 11232890
    Abstract: The present invention relates to an RFeB sintered magnet containing: 28% to 33% by mass of a rare-earth element R, 0% to 2.5% by mass of Co (cobalt) (i.e., Co may not be contained), 0.3% to 0.7% by mass of Al (aluminum), 0.9% to 1.2% by mass of B (Boron), and less than 1,500 ppm of O (oxygen), with the balance being Fe, containing an RFeAl phase having an R6Fe14-xAlx structure in a crystal grain boundary, and having a coercivity of 16 kOe or more.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: January 25, 2022
    Assignee: DAIDO STEEL CO., LTD.
    Inventor: Michihide Nakamura