公开(公告)号：US11008635B2

公开(公告)日：2021-05-18

申请号：US16077266

申请日：2017-02-15

Applicant: JFE Steel Corporation

Inventor： Shimpei Yoshioka ,  Yoshihiko Ono ,  Yusuke Kimata ,  Hiroyuki Masuoka

IPC: C22C38/16 ,  C22C38/60 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/34 ,  C22C38/32 ,  C22C38/38 ,  C21D9/46 ,  C21D6/00 ,  C21D8/02

Abstract: Provided is a high-strength cold-rolled steel sheet has a chemical composition containing, by mass %, C: 0.10% or more and 0.6% or less, Si: 1.0% or more and 3.0% or less, Mn: more than 2.5% and 10.0% or less, P: 0.05% or less, S: 0.02% or less, Al: 0.01% or more and 1.5% or less, N: 0.005% or less, Cu: 0.05% or more and 0.50% or less, and the balance being Fe and inevitable impurities, and a tensile strength of 1180 MPa or more, in which a steel sheet surface coverage of oxides mainly containing Si is 1% or less, a steel sheet surface coverage of iron-based oxides is 40% or less, CuS/CuB is 4.0 or less, and a tensile strength is 1180 MPa or more, where CuS denotes a Cu concentration in a surface layer of a steel sheet and CuB denotes a Cu concentration in base steel.

公开(公告)号：US11008632B2

公开(公告)日：2021-05-18

申请号：US16086431

申请日：2017-03-07

Applicant: JFE Steel Corporation

Inventor： Hidekazu Minami ,  Yoshimasa Funakawa ,  Shinjiro Kaneko

IPC: C21D8/02 ,  C22C38/02 ,  C23C2/02 ,  C23C2/06 ,  C21D9/46 ,  C22C38/06 ,  C22C38/00 ,  C23C2/28 ,  C22C38/04 ,  C22C38/08 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/38

Abstract: A steel sheet is provided that has a tensile strength of 540 MPa or more, includes a particular composition; and has a steel structure containing ferrite and a secondary phase, in which an area fraction of the ferrite is 50% or more, the secondary phase contains 1.0% or more and 25.0% or less of martensite in terms of area fraction with respect to the entirety, the ferrite has an average crystal grain size of 3 μm or more, a difference in hardness between the ferrite and the martensite is 1.0 GPa or more and 8.0 GPa or less, and, in a texture of the ferrite, an inverse intensity ratio of γ-fiber to α-fiber is 0.8 or more and 7.0 or less.

公开(公告)号：US10971289B2

公开(公告)日：2021-04-06

申请号：US15763508

申请日：2016-09-23

Applicant: XIAMEN TUNGSTEN CO., LTD. ,  Fujian Changting Golden Dragon Rare-Earth Co., Ltd.

Inventor： Hiroshi Nagata

IPC: H01F1/057 ,  C22C38/16 ,  C22C38/12 ,  C22C38/10 ,  B22F9/04 ,  B22F3/24 ,  B22F1/00 ,  C22C38/00 ,  H01F41/02

Abstract: Disclosed in the present invention is a composite R—Fe—B based rare-earth sintered magnet comprising Pr and W, wherein the rare-earth sintered magnet comprises an R2Fe14B type main phase, and R is a rare-earth element comprising at least Pr, wherein the raw material components therein comprise more than or equal to 2 wt % of Pr and 0.0005 wt %-0.03 wt % of W; and the rare-earth sintered magnet is made through a process comprising the following steps: preparing molten liquid of the raw material components into a rapidly quenched alloy; grinding the rapidly quenched alloy into fine powder; obtaining a shaped body from the fine powder by using a magnetic field; and sintering the shaped body. By adding a trace amount of W into the rare-earth sintered magnet, the heat resistance and thermal demagnetization performance of the Pr-containing magnet are improved.

公开(公告)号：US20210095361A1

公开(公告)日：2021-04-01

申请号：US16589250

申请日：2019-10-01

Applicant: THE BOEING COMPANY

Inventor： Brennan YAHATA ,  Julie Miller ,  John H. Martin

IPC: C22C38/06 ,  C22C38/04 ,  C22C38/10 ,  C22C38/12 ,  C22C38/14 ,  C22C38/22 ,  C22C38/26 ,  C21D6/00 ,  C22C1/06

Abstract: Provided are maraging steel alloys having improved microstructures. Some variations provide maraging steel alloys including a base maraging steel alloy, a grain refiner, and optionally, a strengthening element. The base maraging steel alloy is surface-functionalized with the grain refiner. Other variations provide a method of method of manufacturing maraging steel including mixing a base maraging steel alloy with a grain refiner resulting in a maraging steel mixture, melting the maraging steel mixture, and solidifying the maraging steel mixture forming an equiaxed microstructure.

公开(公告)号：US20210091611A1

公开(公告)日：2021-03-25

申请号：US17031363

申请日：2020-09-24

Applicant: Vacuumschmelze GmbH & Co. KG

Inventor： Niklas VOLBERS ,  Rudi ANSMANN

IPC: H02K1/14 ,  H02K1/02 ,  H02K15/02 ,  H02K3/18 ,  C22C38/10 ,  C22C30/00 ,  C22C38/12

Abstract: A multi-part stator for an electric machine is provided. The multi-part stator has a plurality of stator segments, each comprising a plurality of soft magnetic lamination sheets that are stacked one on top of another in a direction of stacking to form a laminated core. At least one lamination sheet projects on at least one edge side of the laminated core of a first stator segment and forms a finger. At least two lamination sheets project on at least one edge side of the laminated core of a second stator segment and form at least two fingers. The finger of the first stator segment and the at least two fingers of the second stator segment engage with one another in order to mechanically couple the first stator segment to the second stator segment.

公开(公告)号：US10957481B2

公开(公告)日：2021-03-23

申请号：US14365035

申请日：2012-12-17

Applicant: APERAM

Inventor： Thierry Waeckerle ,  Remy Batonnet

IPC: H01F41/02 ,  C22F1/16 ,  C21D8/12 ,  C22C30/00 ,  C22C19/07 ,  C22F1/10 ,  C21D6/00 ,  C22C38/12 ,  C22C38/10 ,  C22C38/00 ,  C22C38/42 ,  C22C38/48 ,  C22C38/46 ,  C22C38/16 ,  C22C38/04 ,  C22C38/02 ,  C22C38/52 ,  H01F1/16 ,  A63B23/14 ,  A63B21/00 ,  H01F1/147

Abstract: A method for manufacturing a strip in a soft magnetic alloy capable of being cut out mechanically, the chemical composition of which comprises by weight: 18%≤Co≤55% 0%≤V+W≤3% 0%≤Cr≤3% 0%≤Si≤3% 0%≤Nb≤0.5% 0%≤B≤0.05% 0%≤C≤0.1% 0%≤Zr+Ta≤0.5% 0%≤Ni≤5% 0%≤Mn≤2% The remainder being iron and impurities resulting from the elaboration, according to which a strip obtained by hot rolling is cold-rolled in order to obtain a cold-rolled strip with a thickness of less than 0.6 mm.
After cold rolling, a continuous annealing treatment is carried out by passing into a continuous oven, at a temperature comprised between the order/disorder transition temperature of the alloy and the onset temperature of ferritic/austenitic transformation of the alloy, followed by rapid cooling down to a temperature below 200° C. Strip obtained.

公开(公告)号：US10926333B2

公开(公告)日：2021-02-23

申请号：US16325881

申请日：2017-08-16

Applicant: URBAN MINING TECHNOLOGY COMPANY, INC.

Inventor： Miha Zakotnik ,  Davide Prosperi ,  Gojmir Furlan ,  Catalina O. Tudor ,  Alex Ivor Bevan

IPC: B22D11/22 ,  B22F9/08 ,  B22F1/00 ,  C22C38/00 ,  C22C38/10 ,  C22C38/16 ,  H01F41/02 ,  B22D11/06 ,  C22C28/00 ,  H01F1/055 ,  H01F1/057 ,  H01F1/058

Abstract: A caster assembly configured to process and store a material includes a reaction chamber, a storage assembly configured to store material processed in the reaction chamber, and a blower configured to process and store the material. The reaction chamber includes a vessel configured to hold the material in a melted state prior to processing and a powder generating assembly configured to receive the material from the melting vessel. The powder generating assembly includes a feeding chamber and a feeding device disposed at least partially within the feeding chamber. The feeding device includes at least one nozzle configured to inject inert fluid, where the fluid is a gas, liquid, or combination of the two into the feeding chamber and a material inlet through which the material is configured to flow into the feeding chamber to be exposed to the inert fluid, where the fluid is a gas, liquid, or combination of the two.

公开(公告)号：US20210012934A1

公开(公告)日：2021-01-14

申请号：US17024033

申请日：2020-09-17

Applicant: NITTO DENKO CORPORATION

Inventor： Kenichi FUJIKAWA ,  Takashi YAMAMOTO ,  Hirofumi EBE ,  Makoto FUJIHARA ,  Eiichi IMOTO ,  Tomohiro OMURE

IPC: H01F1/053 ,  H01F7/02 ,  H01F1/057 ,  B22F1/00 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/12 ,  C22C38/16

Abstract: Provided are: a sintered body that forms a rare-earth magnet and is configured in a manner such that the divergence between the orientation angles of the easy axes of magnetization of magnet material particles and the orientation axis angle of the magnet material particles is kept within a prescribed range in an arbitrary micro-section of a magnet cross-section; and a rare-earth sintered magnet. This sintered body for forming a rare-earth magnet has two or more different regions exhibiting an orientation axis angle of at least 20°, given that the orientation axis angle is defined as the highest-frequency orientation angle among the orientation angles of the easy magnetization axes, relative to a pre-set reference line, of a plurality of magnet material particles in a rectangular section at an arbitrary position in a plane including the thickness direction and the widthwise direction.

公开(公告)号：US10811175B2

公开(公告)日：2020-10-20

申请号：US15796153

申请日：2017-10-27

Applicant: GRIREM ADVANCED MATERIALS CO., LTD.

Inventor： Yang Luo ,  Chao Yuan ,  Kuo Men ,  Ningtao Quan ,  Hongbin Zhang ,  Wenlong Yan ,  Dunbo Yu ,  Yuanfei Yang

IPC: H01F1/055 ,  B22F9/04 ,  C22C33/02 ,  C22C1/04 ,  H01F1/057 ,  C22C1/03 ,  C22C28/00 ,  C22C38/00 ,  C22C38/10

Abstract: An alloy material, a bonded magnet, and a modification method of a rare-earth permanent magnetic powder are provided by the present application. A melting point of the alloy material is lower than 600° C. and a composition of the alloy material by an atomic part is RE100-x-yMxNy, wherein RE is one or more of non-heavy rare-earth Nd, Pr, Sm, La and Ce, M is one or more of Cu, Al, Zn and Mg, N is one or more of Ga, In and Sn, x=10-35 and y=1-15.

公开(公告)号：US10801085B2

公开(公告)日：2020-10-13

申请号：US15577989

申请日：2016-05-26

Applicant: JFE STEEL CORPORATION

Inventor： Yuma Honda ,  Yoshimasa Funakawa ,  Kozo Harada

IPC: C21D6/00 ,  C21D8/04 ,  C21D9/46 ,  C22C38/54 ,  C22C38/48 ,  C22C38/16 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/28 ,  C23C2/40 ,  B32B15/01 ,  C25D3/22 ,  C25D5/36 ,  C22C38/12 ,  C21D9/48 ,  C23C2/06 ,  C23C2/02 ,  C21D9/56 ,  C21D1/76 ,  C22C38/32 ,  C22C38/10 ,  C22C38/26 ,  C22C38/18 ,  C22C38/42 ,  C22C38/44 ,  C22C38/40 ,  C22C38/08 ,  C22C38/20 ,  C23C28/02 ,  C23C2/36 ,  C23C2/04 ,  C23C30/00 ,  C23C2/26 ,  B32B15/04 ,  B32B15/18 ,  C21D1/74 ,  C21D1/26

Abstract: A high-strength steel sheet having high yield ratio, excellent stretch flange formability, and resistance to secondary working embrittlement. The steel sheet has a composition containing C: 0.02% to less than 0.10%, Si: less than 0.3%, Mn: less than 1.0%, P: 0.10% or less, S: 0.020% or less, Al: 0.01% to 0.10%, N: 0.010% or less, and Nb: 0.003% to less than 0.070% on a mass basis, the remainder being Fe and inevitable impurities. A steel microstructure of the steel sheet contains ferrite: 90% or more and a total of pearlite, martensite, retained austenite, and cementite: 0% to 10% on an area fraction basis, in which the average grain size of the ferrite is 15.0 μm or less, and in which the average aspect ratio of the ferrite is 1.2 or more; and a tensile strength of 500 MPa or less.