公开(公告)号：US20240363272A1

公开(公告)日：2024-10-31

申请号：US18646207

申请日：2024-04-25

申请人： Proterial, Ltd.

发明人： Futoshi KUNIYOSHI

IPC分类号： H01F1/057 ,  B22F3/16 ,  B22F9/02 ,  B22F9/04 ,  C22C28/00 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16

CPC分类号： H01F1/0577 ,  B22F3/16 ,  B22F9/023 ,  B22F9/04 ,  C22C28/00 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/14 ,  C22C38/16 ,  B22F2009/044 ,  B22F2201/02 ,  B22F2201/11 ,  B22F2202/05 ,  B22F2998/10 ,  B22F2999/00

摘要： Provided is a sintered R-T-B based magnet having high Br and high HcJ. A sintered R-T-B based magnet containing: R: 26.8 mass % or more and 31.5 mass % or less (R is a rare earth element, and necessarily contains Pr); M: 0.05 mass % or more and 2.00 mass % or less (M is at least one selected from the group consisting of Ga, Cu, Zn, Al, and Si, and necessarily contains Cu); B: 0.84 mass % or more and 0.94 mass % or less; and T: 61.5 mass % or more (T is Fe and Co, and 90% or more of T is Fe in mass ratio), and having an internal structure, wherein the internal structure includes: crystal grains; a first phase between adjacent two crystal grains; and a second phase with Cu and Pr concentrations higher than those of the first phase between the first phase and one or each of the two crystal grains and, wherein the second phase contains Pr of 20 mass % or more 65 mass % or less.

公开(公告)号：US20240363270A1

公开(公告)日：2024-10-31

申请号：US18376273

申请日：2023-10-03

申请人： HYUNDAI MOTOR COMPANY ,  KIA CORPORATION ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUS

发明人： Bo Kyeong Han ,  Sae Mee Yun ,  Kang Mo Koo ,  Yong Ho Choa ,  Byung Kwon Jang

IPC分类号： H01F1/057 ,  B22F1/05 ,  B22F3/02 ,  B22F9/04 ,  B22F9/22 ,  C22C33/02 ,  C22C38/00 ,  H01F41/02

CPC分类号： H01F1/0571 ,  B22F1/05 ,  B22F3/02 ,  B22F9/04 ,  B22F9/22 ,  C22C33/0235 ,  C22C38/005 ,  H01F41/0253 ,  B22F2201/013 ,  B22F2201/10 ,  B22F2301/355 ,  B22F2304/05 ,  B22F2998/10 ,  C22C2202/02

摘要： A method of preparing a magnet powder, and a magnet powder, are disclosed. The method includes: preparing a neodymium praseodymium (Nd, Pr) mixed oxide containing Nd and Pr; preparing iron (Fe) oxide; preparing boron (B) oxide; mixing the prepared (Nd, Pr) mixed oxide, iron oxide, and boron oxide to prepare a first mixture; mixing the first mixture with calcium (Ca) to prepare a second mixture; inducing diffusion while shaping and pressing the second mixture; reducing the shaped and pressed second mixture to prepare a magnetic substance containing Nd, Fe, and B; powdering the reduced magnetic substance; and removing reduction by-products from the powdered magnetic substance.

公开(公告)号：US12129891B2

公开(公告)日：2024-10-29

申请号：US17244308

申请日：2021-04-29

申请人： NTN CORPORATION

发明人： Tomonori Yamashita ,  Yoshinori Ito ,  Daisuke Takeda ,  Yuta Ohashi

IPC分类号： B22F5/00 ,  C22C33/02 ,  C22C38/00 ,  C22C38/16 ,  F16C33/10 ,  F16C33/12 ,  F16C33/14

CPC分类号： F16C33/121 ,  B22F5/00 ,  C22C33/0278 ,  C22C38/00 ,  C22C38/008 ,  C22C38/16 ,  F16C33/10 ,  F16C33/104 ,  F16C33/128 ,  F16C33/14 ,  F16C33/145 ,  B22F2998/10 ,  F16C2204/10 ,  F16C2204/60 ,  F16C2240/48 ,  Y10T428/12014 ,  B22F2998/10 ,  B22F1/09 ,  B22F3/02 ,  B22F3/10

摘要： Provided is a sintered bearing formed mainly of an iron structure (33) and a copper structure (31) which are formed of a partially diffusion-alloyed powder (11) of an iron powder (12) and a copper powder (13). The sintered bearing includes a copper structure (31d) formed of a granular elemental copper powder (13′) having a grain diameter of 45 μm or less, the ratio of the copper structure (31d) being 10 mass % or less. With this, a further increase in strength of the sintered bearing can be realized.

公开(公告)号：US12129558B2

公开(公告)日：2024-10-29

申请号：US17414357

申请日：2019-09-11

申请人： Hitachi, Ltd.

发明人： Matahiro Komuro ,  Yuichi Satsu ,  Hisamitsu Hatou ,  Seunghwan Park

IPC分类号： H01F1/147 ,  C21D1/06 ,  C22C38/00 ,  C22C38/12 ,  C23C8/22 ,  H02K1/02

CPC分类号： C23C8/22 ,  C21D1/06 ,  C22C38/001 ,  C22C38/12 ,  H01F1/147 ,  H02K1/02 ,  C21D2211/008 ,  C22C2202/02

摘要： A soft magnetic material that is sheet-shaped or foil-shaped and has a high saturation magnetic flux density, contains iron, carbon, and nitrogen, and includes a martensite containing carbon and nitrogen, and γ-Fe, wherein the γ-Fe includes a nitrogen-containing phase. The soft magnetic material is produced by steps of heating an iron-based material that is sheet-shaped or foil-shaped, carburizing the iron-based material with a carburizing gas, dispersing a granular carbide in α-Fe in the iron-based material at a temperature equal to or lower than a eutectoid temperature, transforming the α-Fe into γ-Fe at a temperature higher than the eutectoid temperature, diffusing nitrogen into the γ-Fe using a nitrogen supply gas to form γ-Fe—N—C, and rapidly heating and then rapidly cooling the γ-Fe—N—C to transform the γ-Fe—N—C into a martensite. The result is a thermally stable soft magnetic material having a saturation magnetic flux density higher than that of pure iron.

公开(公告)号：US20240352565A1

公开(公告)日：2024-10-24

申请号：US18579354

申请日：2021-08-27

申请人： NIPPON STEEL CORPORATION

发明人： Ryuichi NISHIMURA ,  Yasuhiro ITO ,  Yasunori SAWA ,  Koichi HAMADA ,  Satoshi HIRONAKA

IPC分类号： C22C38/60 ,  B21D28/26 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/44 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

CPC分类号： C22C38/60 ,  B21D28/26 ,  C21D6/002 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/021 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/44 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： This outer plate component for an automobile includes a steel sheet, and a rolling direction of the steel sheet extends along a vehicle body left-right direction in plan view.

公开(公告)号：US20240352551A1

公开(公告)日：2024-10-24

申请号：US18684593

申请日：2022-08-25

申请人： POSCO CO., LTD

发明人： Young-Roc IM ,  Sang-Ho UHM ,  Young-Ha KIM

IPC分类号： C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC分类号： C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

摘要： Provided is a cold-rolled steel sheet including: by weight %, C: 0.10 to 0.16%, Si: 0.3 to 0.8%, Al: 0.01 to 0.5%, Mn: 2.0 to 3.0%, Cr: 0.001 to 0.5%, Mo: 0.001 to 0.5%, B: 0.0001 to 0.001%, Nb: 0.001 to 0.05%, Ti: 0.001 to 0.05%, P: 0.04% or less (excluding 0%), S: 0.01% or less (excluding 0%), N: 0.01% or less (excluding 0%), a remainder of Fe, and other unavoidable impurities, as a microstructure, by area %, ferrite: 10% or less (excluding 0%), retained austenite: more than 1% to 5% or less, martensite: 25% or more but less than 50%, and bainite: 35% or more but less than 70%. An average size of martensite-austenite (MA) in the bainite is 0.35 to 0.55 μm.

公开(公告)号：US12123082B2

公开(公告)日：2024-10-22

申请号：US17594382

申请日：2020-04-13

申请人： JFE STEEL CORPORATION

发明人： Yukino Miyamoto ,  Yoshiaki Zaizen ,  Yoshihiko Oda

IPC分类号： C22C38/14 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12

CPC分类号： C22C38/14 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12

摘要： A non-oriented electrical steel sheet having: low high-frequency iron loss and high magnetic flux density; an inner layer and surface layers provided on both sides of the inner layer, the surface layers and the inner layer having specific chemical compositions; the thickness t of 0.01 mm to 0.35 mm; a multilayer ratio of t1 to t of 0.10 to 0.70, t1 denoting a total thickness of the surface layers; a difference between [Si]1 and [Si]0 of 1.0 mass % to 4.5 mass % or less, [Si]1 denoting a Si content in each of the surface layers and [Si]0 denoting a Si content in the inner layer; and a difference between [Mn]0 and [Mn]1 of 0.01 mass % to 0.40 mass %, [Mn]0 denoting a Mn content at a mid-thickness position t/2 and [Mn]1 denoting an average Mn content in a region from a surface to a position at a depth of ( 1/10)t.

公开(公告)号：US12123080B2

公开(公告)日：2024-10-22

申请号：US18008639

申请日：2021-08-06

申请人： NIPPON STEEL CORPORATION

发明人： Yuji Sakiyama ,  Takashi Yasutomi ,  Katsuya Nakano ,  Yoshiaki Honda ,  Masahiro Nakata

IPC分类号： C22C38/02 ,  B32B15/01 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/32 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/60

CPC分类号： C22C38/02 ,  B32B15/011 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/32 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/60 ,  B32B2307/536 ,  B32B2307/54 ,  B32B2311/30

摘要： Provided is a steel sheet comprising a sheet thickness center part and a first surface layer part and a second surface layer part respectively arranged at two sides of the sheet thickness center part, wherein the first surface layer part and second surface layer part respectively independently have thicknesses of more than 10 μm to 30% or less of the sheet thickness, the first surface layer part and second surface layer part have average Vickers hardnesses different from the average Vickers hardness of a sheet thickness ½ position, and a first hardness cumulative value at a region from a surface of the first surface layer part side to 30% of the sheet thickness is 1.05 times or more of a second hardness cumulative value at a region from a surface of the second surface layer part side to 30% of the sheet thickness.

公开(公告)号：US12123071B2

公开(公告)日：2024-10-22

申请号：US17760448

申请日：2021-02-11

申请人： TATA STEEL IJMUIDEN B.V.

发明人： Radhakanta Rana

IPC分类号： B32B15/01 ,  C21D6/00 ,  C21D8/02 ,  C21D9/52 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12

CPC分类号： C21D9/52 ,  B32B15/012 ,  B32B15/013 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C21D2211/008

摘要： A hot-rolled (HR) strip steel with high flangeability at ultra-high strength levels with a high total elongation, bendability and toughness values, and a method of manufacturing the hot-rolled steel and use thereof.

公开(公告)号：US12123070B2

公开(公告)日：2024-10-22

申请号：US17299308

申请日：2019-11-27

申请人： JFE STEEL CORPORATION

发明人： Keishi Inoue ,  Hidetaka Kawabe ,  Masataka Yoshino ,  Mitsuyuki Fujisawa

IPC分类号： C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60

CPC分类号： C21D9/46 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60 ,  C21D2211/005

摘要： A ferritic stainless steel sheet has a predetermined chemical composition and thickness, and has an area ratio of crystal grains of 45 μm or more in grain size of 20% or less.