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公开(公告)号：US20240355515A1
公开(公告)日：2024-10-24
申请号：US18548206
申请日：2022-01-17
发明人： Weiguo Mou , Jiaying Huang
IPC分类号： H01F1/057 , B22F3/16 , B22F3/24 , B22F9/02 , B22F9/04 , C21D1/84 , C21D6/00 , C22C33/04 , C22C38/00 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , H01F41/02
CPC分类号： H01F1/0577 , B22F3/16 , B22F3/24 , B22F9/023 , B22F9/04 , C21D1/84 , C21D6/007 , C22C33/04 , C22C38/002 , C22C38/005 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , H01F41/0293 , B22F2003/248 , B22F2009/044 , B22F2202/05 , B22F2301/355 , B22F2998/10 , B22F2999/00 , C22C2202/02
摘要： Disclosed are an R-T-B magnet and a preparation method therefor. The R-T-B magnet comprises the following components: R≥29 wt. %, R being a rare earth element and containing Nd, wherein Nd is ≥22 wt. %; 0.2-0.75 wt. % of Ti+Nb; 0.05-0.45 wt. % of Cu; 0.955-1.15 wt. % of B; and 58-69 wt. % of Fe, wherein wt. % is the ratio of the mass of each component to the total mass of the components; and the mass ratio of Ti to Nb is (1-5):1. According to the present invention, the matching relationship among the added elements in the R-T-B magnet is further optimized, and an R-T-B magnet with better magnetic properties such as relatively high residual magnetization, coercivity, and squareness can be prepared by using the formula.
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公开(公告)号：US12098439B2
公开(公告)日：2024-09-24
申请号：US17915739
申请日：2021-03-25
发明人： Lingling Yang , Yoshiyasu Kawasaki , Tatsuya Nakagaito , Shotaro Terashima , Shunsuke Yamamoto , Katsuya Hoshino , Yuki Takeda
IPC分类号： C22C38/60 , B21C47/02 , B32B15/01 , B32B15/04 , B32B15/18 , C21D1/18 , C21D1/25 , C21D1/76 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32 , C22C38/34 , C22C38/38 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/28 , C23C2/40 , C23C28/00 , C23C28/02 , C23C30/00
CPC分类号： C21D9/46 , B21C47/02 , B32B15/013 , B32B15/015 , B32B15/04 , B32B15/043 , B32B15/18 , C21D1/185 , C21D1/25 , C21D1/76 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0242 , C21D8/0263 , C21D8/0273 , C21D8/0278 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32 , C22C38/34 , C22C38/38 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/285 , C23C2/29 , C23C2/40 , C23C28/021 , C23C28/025 , C23C28/3225 , C23C30/00 , C23C30/005 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , Y10T428/12458 , Y10T428/12792 , Y10T428/12958 , Y10T428/12965 , Y10T428/12972 , Y10T428/24942 , Y10T428/2495 , Y10T428/24967 , Y10T428/24983 , Y10T428/26 , Y10T428/263 , Y10T428/264 , Y10T428/265
摘要： A steel sheet having a tensile strength (TS) of 1180 MPa or more, high LME resistance, and good weld fatigue properties. The steel sheet has a specific chemical composition and a specific steel microstructure. Crystal grains containing an oxide of Si and/or Mn in a region within 4.9 μm in a thickness direction from a surface of the steel sheet have an average grain size in the range of 3 to 10 μm, the lowest Si concentration LSi and the lowest Mn concentration LMn in the region within 4.9 μm in the thickness direction from the surface of the steel sheet and a Si concentration TSi and a Mn concentration TMn at a quarter thickness position of the steel sheet satisfy a specified formula.
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公开(公告)号：US12077832B2
公开(公告)日：2024-09-03
申请号：US18025862
申请日：2021-09-28
发明人： Yuya Suzuki , Kengo Takeda
IPC分类号： C21D9/46 , B22D11/00 , B32B15/01 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/20 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/34 , C22C38/38 , C22C38/42 , C22C38/48 , C22C38/58 , C22C38/60 , C23C2/28 , C23C2/40
CPC分类号： C21D9/46 , B22D11/001 , B32B15/013 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/105 , C22C38/12 , C22C38/14 , C22C38/20 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/34 , C22C38/38 , C22C38/42 , C22C38/48 , C22C38/58 , C22C38/60 , C23C2/28 , C21D2211/005 , C21D2211/009 , C23C2/40
摘要： A steel sheet according to an aspect of the present invention has a predetermined chemical composition, in which a metallographic structure at a ¼ thickness portion includes, by volume percentage, a total of 50% or more of one or both of martensite and bainite and 8% or more of residual austenite, an average value of aspect ratios of prior austenite grains is 5.0 or more, number density of AlN is 3000 pieces/mm2 or more and less than 6000 pieces/mm2 at a depth position of 30 μm from a sheet surface, an internal oxidation layer in which at least a part of a crystal grain boundary is coated with an oxide is provided from the sheet surface to a depth of 5.0 μm or more, grain boundary coverage of the oxide is 60% or more in a region from the sheet surface to a depth of 5.0 μm, and a tensile strength is 980 MPa or more.
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公开(公告)号：US12046399B2
公开(公告)日：2024-07-23
申请号：US17585934
申请日：2022-01-27
发明人： Wanfeng Li , Chuanbing Rong , Michael W. Degner
IPC分类号： H01F1/055 , B33Y70/00 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/12 , H01F1/057 , H01F41/02 , B22F10/28 , B33Y10/00
CPC分类号： H01F1/057 , B33Y70/00 , C22C38/005 , C22C38/06 , C22C38/105 , C22C38/12 , H01F41/0253 , B22F10/28 , B22F2301/355 , B33Y10/00 , C22C2202/02
摘要： A permanent magnet formed by additively manufacturing magnetic phases and buffer phases is disclosed. The buffer phase(s) may improve performance, enhance mechanical properties and allow the magnet to better tolerate stresses such that defects such as cracking do not occur or are less likely to occur. The buffer phase may be a magnetic or non-magnetic material.
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公开(公告)号：US20240232453A9
公开(公告)日：2024-07-11
申请号：US18492210
申请日：2023-10-23
IPC分类号： G06F30/17 , C21D1/74 , C21D6/00 , C22C1/03 , C22C19/07 , C22C33/06 , C22C38/10 , C22C38/12 , C22F1/02 , C22F1/10 , G06N5/022 , G16C60/00
CPC分类号： G06F30/17 , C21D1/74 , C21D6/007 , C22C1/03 , C22C19/07 , C22C33/06 , C22C38/10 , C22C38/12 , C22F1/02 , C22F1/10 , G06N5/022 , G16C60/00
摘要： Methods of modeling metal alloys and forming those alloys are provided. The method involves comparing the strain accommodation and cleavage energies of a base alloy comprising a first metal and a chemical element different from the first metal. If a predetermined difference between those energies would be achieved, the base alloy will be sufficiently ductile. If that predetermined difference would not be achieved, the base alloy will not be sufficiently ductile, and the base alloy is modified (e.g., by adding a ductility component) until the predetermined difference in energies would be achieved, at which point, the alloy can be formed using conventional methods or further modified to achieve the desired degree of ductility.
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6.发明公开公开(公告)号：US20240209467A1
公开(公告)日：2024-06-27
申请号：US18596117
申请日：2024-03-05
申请人： POSCO CO, LTD
发明人： Hwan-Goo Seong , Yeol-Rae Cho , Seong-Beom Bae
IPC分类号： C21D8/02 , C21D9/08 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/10 , C22C38/12 , C22C38/28 , C22C38/32 , C23G1/00
CPC分类号： C21D8/0226 , C21D9/085 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/105 , C22C38/12 , C22C38/28 , C22C38/32 , C23G1/00 , C21D2211/001 , C21D2211/005 , C21D2211/008 , C21D2211/009
摘要： A preferable aspect of the present invention provides: an ultra-high-strength hot-rolled steel sheet containing, by weight, one or two of 0.40-0.60% of C, 0.7-1.5% of Mn, 0.3% or less (excluding 0%) of Si, 0.03% or less (including 0%) of P, 0.004% or less (including 0%) of S, 0.04% or less (excluding 0%) of Al, 0.3% or less (excluding 0%) of Cr, 0.3% or less (excluding 0%) of Mo, 0.9-1.5% of Ni, and 0.9-1.5% of Cu, 1.1% or more of Cu+Ni, 0.04% or less (excluding 0%) of Ti, 0.005% or less (excluding 0%) of B, 0.006% or less (excluding 0%) of N, and the balance Fe and other impurities, the alloy elements satisfying relational formulas 1 and 2 below, wherein a microstructure of the hot-rolled steel sheet comprises, by volume, 7% or more of ferrite and 93% or less of perlite; a steel pipe and a member each using the same; and manufacturing methods therefor. [Relational formula 1] (Mn/Si) #3 (weight ratio) [Relational formula 2] (Ni/Si) #1 (weight ratio)
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公开(公告)号：US20240170206A1
公开(公告)日：2024-05-23
申请号：US18284308
申请日：2022-02-24
申请人： PROTERIAL, LTD.
发明人： Kouta SAITOU , Futoshi KUNIYOSHI
IPC分类号： H01F41/02 , B22F3/16 , B22F9/02 , B22F9/04 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/057
CPC分类号： H01F41/0253 , B22F3/16 , B22F9/023 , B22F9/04 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , B22F2009/044 , B22F2202/05 , B22F2301/355 , B22F2304/10 , B22F2998/10 , B22F2999/00 , C22C2202/02 , H01F1/0577
摘要： A method for producing an R-T-B-based sintered magnet comprises a sintering step for sintering a shaped product of R-T-B-based alloy powder. This sintering step includes: a first step for heating the shaped product at a first sintering temperature T1 to prepare a first sintered body; a cooling step for lowering the temperature of the first sintered body to a cooling temperature T0; and a second step for heating the first sintered body at a second sintering temperature T2 to prepare a second sintered body. The first sintering temperature T1 and the second sintering temperature T2 are higher than 900° C., and the cooling temperature T0 is 900° C. or lower. A first sintering time t1 for which the first sintering temperature T1 is maintained in the first step is shorter than a second sintering time t2 for which the second sintering temperature T2 is maintained in the second step.
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公开(公告)号：US20240158882A1
公开(公告)日：2024-05-16
申请号：US18284036
申请日：2022-02-07
发明人： Kengo TAKEDA , Katsuya NAKANO
IPC分类号： C21D9/46 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/28 , C22C38/30 , C22C38/32 , C22C38/34 , C22C38/38 , C22C38/42 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58 , C22C38/60
CPC分类号： C21D9/46 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/105 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/28 , C22C38/30 , C22C38/32 , C22C38/34 , C22C38/38 , C22C38/42 , C22C38/44 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/58 , C22C38/60 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C21D2211/009
摘要： A steel sheet excellent in energy absorption at the time of crushing deformation, that is, steel sheet having a predetermined chemical composition and steel microstructure which has on the sheet surface a plurality of step differences having height differences of more than 5.0 μm at intervals of 2.0 mm or less.
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公开(公告)号：US11965222B2
公开(公告)日：2024-04-23
申请号：US17158097
申请日：2021-01-26
IPC分类号： C21D9/46 , B32B15/01 , B32B15/04 , B32B15/18 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/60 , C23C2/00 , C23C2/04 , C23C2/06 , C23C2/12 , C23C2/28 , C23C2/40 , C23C30/00 , C25D5/50 , C25D7/06
CPC分类号： C21D9/46 , B32B15/01 , B32B15/013 , B32B15/04 , B32B15/043 , B32B15/18 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0273 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/30 , C22C38/32 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/52 , C22C38/54 , C22C38/60 , C23C2/00 , C23C2/04 , C23C2/06 , C23C2/12 , C23C2/28 , C23C2/40 , C23C30/00 , C23C30/005 , C25D5/50 , C25D7/0614 , Y10T428/12757 , Y10T428/12799 , Y10T428/12951 , Y10T428/12972
摘要： A method of producing a hot-rolled steel sheet and a method for producing a cold-rolled full hard steel sheet are provided. The methods comprising heating a steel slab having a composition containing, in terms of mass %, C: 0.010% or more and 0.150% or less, Si: 0.20% or less, Mn: 1.00% or less, P: 0.100% or less, S: 0.0500% or less, Al: 0.001% or more and 0.100% or less, N: 0.0100% or less, and the balance being Fe and unavoidable impurities, in which 0.002%≤[% P]+[% S]≤0.070% ([% M] denotes a content (mass %) of M element in steel) is satisfied.
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10.发明公开公开(公告)号：US20240112854A1
公开(公告)日：2024-04-04
申请号：US18476691
申请日：2023-09-28
申请人： PROTERIAL, LTD.
IPC分类号： H01F41/00 , B22F1/05 , B22F3/16 , B22F9/04 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/053
CPC分类号： H01F41/00 , B22F1/05 , B22F3/16 , B22F9/04 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/0536 , B22F2009/044 , B22F2201/20 , B22F2202/05 , B22F2301/355 , B22F2304/10 , B22F2998/10 , B22F2999/00
摘要： A method for recycling a rare earth element-containing powder, including:
disintegrating a molded body for a rare earth sintered magnet including a rare earth element-containing powder in oil such that a 149 mesh-pass, 500 mesh-on powder is included; and
separating and collecting a 149 mesh-pass powder obtained after the disintegrating to obtain a recycles powder.
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