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    CORE BLOCK, STACKED CORE, AND ROTATING ELECTRICAL MACHINE
    3.
    发明公开
    CORE BLOCK, STACKED CORE, AND ROTATING ELECTRICAL MACHINE 审中-公开

    公开(公告)号：EP4443704A2

    公开(公告)日：2024-10-09

    申请号：EP24191019.9

    申请日：2020-06-22

    申请人： NIPPON STEEL CORPORATION

    发明人： The designation of the inventor has not yet been filed

    IPC分类号： H02K1/16

    CPC分类号： H02K1/148 ,  H02K2213/0320130101 ,  H01F3/02 ,  H02K15/02 ,  H02K1/16 ,  H02K15/022 ,  Y02T10/64

    摘要： What is disclosed is a core block, a plurality thereof constituting a laminated core by being connected in an annular shape, the core block including: a plurality of electrical steel sheet pieces stacked to each other; and an adhesion part which is provided between the electrical steel sheet pieces adjacent in a stacking direction and adheres the electrical steel sheet pieces to each other, in which each of the electrical steel sheet pieces comprises an arc-shaped stator yoke part and a tooth part that protrudes from the stator yoke part to one side in a radial direction of the stator yoke part. The adhesion part includes a pair of first portions that extend along peripheral edges on both sides of the tooth part in a circumferential direction; a pair of third portions that extend from base ends of the first portions to both sides in the circumferential direction along a peripheral edge on the one side in the radial direction of the stator yoke part; and a fourth portion that extends in the circumferential direction along a peripheral edge on another side of the stator yoke part in the radial direction, in which an adhesion area ratio of the electrical steel sheet piece (40) by the adhesion part is 1% or more and 60% or less.

    STEEL MEMBER AND STEEL SHEET
    4.
    发明公开
    STEEL MEMBER AND STEEL SHEET 审中-公开

    公开(公告)号：EP4442849A1

    公开(公告)日：2024-10-09

    申请号：EP22898702.0

    申请日：2022-11-29

    申请人： NIPPON STEEL CORPORATION

    发明人： TABATA, Shinichiro ,  KUSUMI, Kazuhisa

    IPC分类号： C22C38/00 ,  C22C38/60 ,  C21D1/18 ,  C21D9/00 ,  C21D9/46

    CPC分类号： C22C38/00 ,  C21D9/00 ,  C21D9/46 ,  C21D1/18 ,  C22C38/60

    摘要： This steel member has a predetermined chemical composition, in which, when a 1/4 position of a thickness in a thickness direction from a surface is defined as a 1/4 depth position, a metallographic structure at the 1/4 depth position includes 90% or more of martensite by volume fraction, in the metallographic structure at the 1/4 depth position, L49-56°/L4-12°, which is a ratio of a length L49-56° of grain boundaries having an angle of rotation of 49° to 56° to a length L4-12° of grain boundaries having an angle of rotation of 4° to 12° about a direction as a rotation axis, among grain boundaries of grains having a body-centered structure, is 1.10 or more, and a tensile strength of the steel member is more than 1,500 MPa.

    LAMINATED CORE AND ROTATING ELECTRICAL MACHINE
    6.
    发明公开
    LAMINATED CORE AND ROTATING ELECTRICAL MACHINE 审中-公开

    公开(公告)号：EP4439928A1

    公开(公告)日：2024-10-02

    申请号：EP22898280.7

    申请日：2022-10-19

    申请人： NIPPON STEEL CORPORATION

    发明人： HIRAYAMA, Ryu ,  TAKEDA, Kazutoshi ,  WAKISAKA, Takeaki ,  YAMAZAKI, Shuichi

    IPC分类号： H02K1/18

    CPC分类号： H02K1/18

    摘要： An electrical steel sheet includes an annular body. At least one of a plurality of adhesion layers (41) is a first adhesion layer. In one of two electrical steel sheets sandwiching the first adhesion layer in a stacking direction, when an imaginary axis intersecting with a central axis of the annular body and extending in an easy-magnetization direction is defined as an L-axis, an imaginary axis intersecting with the central axis and intersecting with the L-axis is defined as a C-axis, and the electrical steel sheet is partitioned into a plurality of sections (S) in a circumferential direction of the annular body by the L-axis and the C-axis, at least one of the plurality of sections (S) is a first section. In the first section, an area of the first adhesion layer in a first portion (P1) of the electrical steel sheet where a main magnetic flux is generated in the L-axis direction is smaller than an area of the first adhesion layer in a second portion (P2) of the electrical steel sheet where the main magnetic flux is generated in the C-axis direction.

    TITANIUM PLATE
    9.
    发明公开
    TITANIUM PLATE 审中-实审

    公开(公告)号：EP4431626A1

    公开(公告)日：2024-09-18

    申请号：EP21964101.6

    申请日：2021-11-12

    申请人： NIPPON STEEL CORPORATION

    发明人： TSUKAMOTO, Genki ,  MIYOSHI, Ryotaro ,  KUNIEDA, Tomonori

    IPC分类号： C22C14/00 ,  C22F1/00 ,  C22F1/18

    CPC分类号： C22C14/00 ,  C22F1/00 ,  C22F1/18

    摘要： A titanium plate according to an aspect of the present invention includes, as a chemical composition, in mass%, O: 0.02% to 0.15%, Fe: 0.02% to 0.20%, N: 0 to 0.08%, C: 0 to 0.100%, and H: 0 to 0.013%, and a remainder including Ti and impurities, in which when the crystal orientation of an α phase is represented by an Euler angle g = (ϕ1, Φ, ϕ2), the area fraction of the α phase having a crystal orientation in which the absolute value of an orientation difference with respect to (0°, 90°, 0°) is within 30° is defined as X1, the area fraction of the α phase having a crystal orientation in which the absolute value of an orientation difference with respect to (0°, 90°, 30°) is within 30° is defined as X2, and the area fraction of the α phase having a crystal orientation in which absolute values of orientation differences with respect to both (0°, 90°, 0°) and (0°, 90°, 30°) are within 30° is defined as X1&2, X1 + X2 - X1&2 is 0.075 or less.

    MARTENSITIC STAINLESS STEEL SEAMLESS PIPE AND METHOD FOR PRODUCING MARTENSITIC STAINLESS STEEL SEAMLESS PIPE
    10.
    发明公开
    MARTENSITIC STAINLESS STEEL SEAMLESS PIPE AND METHOD FOR PRODUCING MARTENSITIC STAINLESS STEEL SEAMLESS PIPE 审中-实审

    公开(公告)号：EP4431621A1

    公开(公告)日：2024-09-18

    申请号：EP22892640.8

    申请日：2022-10-31

    申请人： NIPPON STEEL CORPORATION

    发明人： KANKI, Kyohei ,  TAKABE, Hideki ,  NISHIHARA, Katsuhiro ,  AMINO, Takafumi

    IPC分类号： C21D8/10 ,  C22C38/00 ,  C22C38/54

    CPC分类号： C22C38/00 ,  C22C38/54 ,  C21D8/10

    摘要： A martensitic stainless steel seamless pipe in which both a high yield strength, and excellent pitting resistance at the inner surface of the martensitic stainless steel seamless pipe are achieved is provided. A martensitic stainless steel seamless pipe according to the present disclosure has a chemical composition described in the description, the microstructure described in the description, and a yield strength of 862 MPa or more. An observation field of view region (50) which is 1.0 µm long in each of a pipe axis direction (L direction) and a pipe radius direction (T direction) and which includes an inner surface (10) extending in the L direction is composed of an inner surface vicinity region (20), an interior region (30) that is below contact with the inner surface vicinity region (20), and a hollow region (40). When the observation field of view region (50) is divided into sections by being divided equally into 256 sections in the L direction and divided equally into 256 sections in the T direction, an inner surface Cu occupancy OScu which is defined as the numerical proportion of sections in which a Cu concentration is more than 2.0% in the inner surface vicinity region (20), and an interior Cu occupancy OICu which is defined as the numerical proportion of sections in which the Cu concentration is more than 2.0% in the interior region (30) satisfy Formula (2). OSCu/OICu≥1.20