公开(公告)号：US20240175103A1

公开(公告)日：2024-05-30

申请号：US18566072

申请日：2022-10-27

申请人： POSCO CO., LTD

发明人： Dong-Wan KIM ,  Min-Seo KOO

IPC分类号： C21D9/46 ,  C21D1/18 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC分类号： C21D9/46 ,  C21D1/18 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

摘要： Provided is an ultrahigh-strength steel sheet with excellent bendability and stretch flangeability, and a manufacturing method therefor and, more specifically, to: a steel sheet having excellent bendability and stretch flangeability by using rapid low-temperature tempering, and having a high yield ratio and ultrahigh strength; and a manufacturing method therefor.

公开(公告)号：US11993835B2

公开(公告)日：2024-05-28

申请号：US17421769

申请日：2020-01-16

申请人： NIPPON STEEL CORPORATION

发明人： Kazutoshi Takeda ,  Ichiro Tanaka ,  Takashi Kataoka ,  Tomoya Suenaga ,  Yuki Kunita

IPC分类号： C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC分类号： C22C38/06 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0284 ,  C21D8/0289 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04

摘要： A grain-oriented electrical steel sheet is a grain-oriented electrical steel sheet which does not have an inorganic coating containing forsterite as a main component and which includes: a base steel sheet containing a prescribed chemical component; a silicon-containing oxide layer provided on the base steel sheet; an iron-based oxide layer provided on the silicon-containing oxide layer; and a tension-insulation coating provided on the iron-based oxide layer, having a thickness of 1 to 3 μm, and containing phosphate and colloidal silica as main components. When the tension-insulation coating undergoes elemental analysis using a glow discharge optical emission spectrometry in a sheet thickness direction from a surface of the tension-insulation coating, a peak Si emission intensity satisfies a prescribed requirement.

公开(公告)号：US20240153683A1

公开(公告)日：2024-05-09

申请号：US18281193

申请日：2022-03-18

申请人： NIPPON STEEL CORPORATION

发明人： Tesshu MURAKAWA

IPC分类号： H01F1/147 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  C22C38/40 ,  C22C38/60

CPC分类号： H01F1/14791 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/007 ,  C21D6/008 ,  C21D8/1233 ,  C21D8/1266 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  C22C38/40 ,  C22C38/60 ,  C22C2202/02

摘要： This non-oriented electrical steel sheet has a predetermined chemical composition, when EBSD observation is performed on a surface parallel to a steel sheet surface, in a case where a total area is indicated by Stot, an area of {411} orientated grains is indicated by S411, an area of orientated grains in which a Taylor factor M becomes more than 2.8 is indicated by Styl, a total area of orientated grains in which the Taylor factor M becomes 2.8 or less is indicated by Stra, an average KAM value of the {411} orientated grains is indicated by K411, and an average KAM value of the orientated grains in which the Taylor factor M becomes more than 2.8 is indicated by Ktyl, 0.20≤Styl/Stot≤0.85, 0.05≤S411/Stot≤0.80, S411/Stra≥0.50, and K411/Ktyl≤0.990 are satisfied.

公开(公告)号：US20240141463A1

公开(公告)日：2024-05-02

申请号：US18279342

申请日：2022-03-18

申请人： NIPPON STEEL CORPORATION

发明人： Tesshu MURAKAWA ,  Minako FUKUCHI

IPC分类号： C22C38/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/32

CPC分类号： C22C38/02 ,  C22C38/002 ,  C22C38/004 ,  C22C38/06 ,  C22C38/32

摘要： This non-oriented electrical steel sheet has a predetermined chemical composition, one or more particles that are a precipitate of a sulfide or an oxysulfide of one or more selected from the group consisting of Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, and Cd or both the sulfide and the oxysulfide and have a diameter of more than 0.5 μm are present in a visual field of 10000 μm2, and, when EBSD observation is performed on a surface parallel to a steel sheet surface, in a case where a total area is indicated by Stot, an area of {100} orientated grains is indicated by S100, an area of orientated grains in which a Taylor factor M becomes more than 2.8 is indicated by Styl, a total area of orientated grains in which the Taylor factor M becomes 2.8 or less is indicated by Stra, an average KAM value of the {100} orientated grains is indicated by K100, and an average KAM value of the orientated grains in which the Taylor factor M becomes more than 2.8 is indicated by Ktyl, 0.20≤Styl/Stot≤0.85, 0.05≤S100/Stot≤0.80, S100/Stra≥0.50, and K100/Ktyl≤0.990 are satisfied.

公开(公告)号：US20240141454A1

公开(公告)日：2024-05-02

申请号：US18570064

申请日：2022-06-17

申请人： POSCO CO., LTD

发明人： Sang-Hyun KIM ,  Min-Seo KOO ,  Eun-Young KIM

IPC分类号： C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC分类号： C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C21D2211/008

摘要： Provided is an ultra high strength steel sheet having a high yield ratio, and a method for manufacturing same and, more specifically, to a steel sheet having ultra high strength, a high yield ratio and excellent bendability, and a method for manufacturing same.

公开(公告)号：US11970752B2

公开(公告)日：2024-04-30

申请号：US17426592

申请日：2020-03-12

申请人： NIPPON STEEL CORPORATION

发明人： Kengo Takeda ,  Hiroyuki Kawata ,  Takafumi Yokoyama ,  Katsuya Nakano

IPC分类号： C21D9/46 ,  C21D8/02 ,  C22C38/00 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60

CPC分类号： C21D9/46 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009

摘要： Provided are: a steel sheet having a high strength and excellent hydrogen embrittlement resistance; and a method of producing the same. The steel sheet has prescribed chemical composition and structure, in which a standard deviation σ of Mn concentration satisfies σ≥0.15 Mnave (wherein, Mnave represents an average Mn concentration) and a region with a Mn concentration of higher than (Mnave+1.3σ) has a circle-equivalent diameter of less than 10.0 μm. The method of producing the steel sheet includes: the hot rolling step that includes finish rolling a slab having a prescribed chemical composition under prescribed conditions; the step of coiling the thus obtained hot-rolled steel sheet at a coiling temperature of 450 to 700° C.; and the step of cold rolling the hot-rolled steel sheet and subsequently annealing this steel sheet at 800 to 900° C.

公开(公告)号：US20240136094A1

公开(公告)日：2024-04-25

申请号：US18277841

申请日：2022-02-18

申请人： LG Innotek Co., LTD.

发明人： Seung Eun LEE ,  Ji Chang RYU ,  Jung Ki LEE

IPC分类号： H01F1/147 ,  C22C38/00 ,  C22C38/02

CPC分类号： H01F1/14766 ,  C22C38/002 ,  C22C38/02 ,  C22C2202/02

摘要： A magnetic core according to one embodiment of the present invention includes a material formed of iron (Fe)-silicon (Si)-boron (B), wherein a mass percentage of Fe in a first surface, which is an upper surface, is different from a mass percentage of Fe in a second surface which is a side surface, and a ratio of the mass percentage of Fe in the first surface to a difference between the mass percentage of Fe in the first surface and the mass percentage of Fe in the second surface is in the range of 6 to 21.

公开(公告)号：US20240133490A1

公开(公告)日：2024-04-25

申请号：US18547172

申请日：2022-02-25

申请人： BAOSHAN IRON & STEEL CO., LTD.

发明人： Wen SUN ,  Yaoheng LIU ,  Zhonghua ZHANG ,  Ping HU ,  Yannan MA

IPC分类号： F16L9/02 ,  C21D1/84 ,  C21D6/00 ,  C21D8/10 ,  C21D9/08 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

CPC分类号： F16L9/02 ,  C21D1/84 ,  C21D6/005 ,  C21D6/008 ,  C21D8/105 ,  C21D9/085 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D2211/002

摘要： The present disclosure provides a bainite geological drilling pipe, comprising the following chemical elements in percentage by mass: 0.14-0.22% of C, 0.2-0.55% of Si, 2.1-2.9% of Mn, 0.01-0.04% of Nb, 0.015-0.04% of Al, 0.001-0.005% of B, 0

公开(公告)号：US20240131632A1

公开(公告)日：2024-04-25

申请号：US18277837

申请日：2022-02-28

申请人： JFE STEEL CORPORATION

发明人： Kazufumi WATANABE ,  Atsushi TAKADA ,  Akiyoshi ANDO ,  Takatoshi OKABE ,  Keiji UEDA

IPC分类号： B23K35/30 ,  B23K9/167 ,  B23K35/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/38

CPC分类号： B23K35/3073 ,  B23K9/167 ,  B23K35/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/38

摘要： A TIG welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the TIG welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.

公开(公告)号：US20240130241A1

公开(公告)日：2024-04-18

申请号：US18276170

申请日：2022-02-04

申请人： SUMITOMO METAL MINING CO., LTD.

发明人： Kazuhiko Okubo ,  Kazutaka Osako ,  Kiyoshi Izumi

IPC分类号： H10N35/85 ,  C22C38/00 ,  G01L1/12 ,  H10N35/00 ,  H10N35/01

CPC分类号： H10N35/85 ,  C22C38/002 ,  G01L1/125 ,  H10N35/01 ,  H10N35/101

摘要： The magnetostrictive member is formed of a single crystal of an iron-based alloy having magnetostrictive characteristics, is a plate-like body having a long-side direction and a short-side direction, and has a lattice constant of a orientation in the short-side direction larger than a lattice constant of a orientation in the long-side direction.