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公开(公告)号：US12000364B2
公开(公告)日：2024-06-04
申请号：US15121058
申请日：2015-02-23
IPC分类号： C22C38/02 , C21D8/10 , C21D9/08 , C21D9/14 , C22C38/00 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , F02M55/02 , C21D7/10
CPC分类号： F02M55/02 , C21D8/10 , C21D8/105 , C21D9/14 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C21D7/10 , C21D9/08 , C21D2211/002 , C21D2211/008 , F02M2200/9061
摘要： A steel pipe has a composition consisting, by mass percent, of, C: 0.12 to 0.27%, Si: 0.05 to 0.40%, Mn: 0.3 to 2.0%, Al: 0.005 to 0.060%, N: 0.0020 to 0.0080%, Ti: 0.005 to 0.015%, Nb: 0.015 to 0.045%, Cr 0 to 1.0%, Mo: 0 to 1.0%, Cu: 0 to 0.5%, Ni: 0 to 0.5%, V: 0 to 0.15%, and B: 0 to 0.005%, the balance being Fe and impurities. As impurities, contents are Ca: 0.001% or less, P: 0.02% or less, S: 0.01% or less, and O: 0.0040% or less. The micro-structure is tempered martensitic or tempered martensite and tempered bainite, in which a prior-austenite grain size number is 10.0 or more. Tensile strength is TS 800 MPa or higher. Critical internal pressure is [0.3′TS′a] or more, a=[(D/d)2−1]/[0.776′(D/d)2], D: pipe outer diameter (mm), d: pipe inner diameter (mm).
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公开(公告)号：US11965230B2
公开(公告)日：2024-04-23
申请号：US17201723
申请日：2021-03-15
申请人： Nucor Corporation
发明人： Weiping Sun
IPC分类号： C22C38/16 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C23C2/02 , C23C2/06 , C23C2/28 , C23C2/40
CPC分类号： C22C38/16 , C21D8/0226 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C23C2/02 , C23C2/024 , C23C2/06 , C23C2/28 , C23C2/40 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008
摘要： A hot rolled, ultra-high strength, complex metallographic structured or multi-phase structured steel that improves formability during stamping or forming process, while possessing one or more of the following properties: excellent castability, rollability and coatability, excellent structural performance, excellent stretch formability, excellent stretch flangeability, excellent dent resistance, excellent durability, excellent impact performance, excellent intrusion and crash resistance without the purposeful addition of boron.
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公开(公告)号：US20240124963A1
公开(公告)日：2024-04-18
申请号：US18277966
申请日：2022-02-25
发明人： Satoshi HIRONAKA , Mai NAGANO , Yasuhiro ITO , Takuya TAKAYAMA
IPC分类号： C22C38/60 , C21D1/84 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/24 , C22C38/28 , C22C38/32 , C22C38/38
CPC分类号： C22C38/60 , C21D1/84 , C21D6/001 , C21D6/002 , 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 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/22 , C22C38/24 , C22C38/28 , C22C38/32 , C22C38/38 , C21D2211/005 , C23C2/285
摘要： An objective of the present invention is to provide a steel sheet having a high strength which can provide excellent appearance quality. The steel sheet has a chemical composition including, in mass %, C: more than 0.030% to 0.145%, Si: 0% to 0.500%, Mn: 0.50% to 2.50%, P: 0% to 0.100%, S: 0% to 0.020%, Al: 0% to 1.000% or less, N: 0% to 0.0100%, and the like, wherein a metal micro-structures consisting of 70 to 95% of ferrite in volume fraction and 5 to 30% of hard phases in volume fraction, and a value X1 obtained by dividing a standard deviation of average Mn concentrations in a rolling direction at ¼ sheet-thickness positions in a sheet thickness direction by an average Mn concentration at the ¼ sheet-thickness positions is 0.025 or less.
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公开(公告)号：US11959150B2
公开(公告)日：2024-04-16
申请号：US17470257
申请日：2021-09-09
申请人： ArcelorMittal
发明人： Emmanuel Dechassey , Christophe Silvy-Leligois , Francisco Chicharro Herranz , Vicente Polo Mestre , Marie-Christine Theyssier , Thierry Celotto , Christine Kaczynski , Thomas Dupuy , Quang-Tien Ngo
IPC分类号： C21D9/46 , B21B15/00 , B23K11/00 , B23K11/04 , B23K26/20 , C21D8/02 , C21D9/50 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C23G1/00 , B23K103/04
CPC分类号： C21D9/46 , B21B15/0085 , B23K11/0073 , B23K11/04 , B23K26/206 , C21D8/0226 , C21D8/0236 , C21D9/50 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C23G1/00 , B23K2103/04 , C21D2211/008
摘要： A steel sheet that is welded and then cold rolled to a thickness between 0.5 mm and 3 mm, the deformation ratio created by cold rolling in the base metal is equal to εMB, for which the deformation ratio created by the cold rolling in the welded joint is equal to εS, where:
0.4
≤
ɛS
ɛ
M
B-
5.发明公开公开(公告)号：US20240105384A1
公开(公告)日：2024-03-28
申请号：US17769049
申请日：2020-09-16
IPC分类号： H01F41/00 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C22C38/60 , C23C22/07
CPC分类号： H01F41/00 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/16 , C22C38/60 , C23C22/07 , C22C2202/02
摘要： A method for forming a film on a surface of a steel sheet includes applying a treatment solution for forming a film containing a fibrous material to the surface of the steel sheet by using a coater under a condition in which a difference between a speed of the steel sheet and a speed of an applicator of the coater is 1.0 m/min or more, inclining the surface of the steel sheet, to which the treatment solution for forming a film has been applied, at an angle of 10° or more with respect to a horizontal plane until drying is started, and thereafter drying the steel sheet.
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公开(公告)号：US20240096531A1
公开(公告)日：2024-03-21
申请号：US18277015
申请日：2022-03-28
IPC分类号： H01F1/147 , B32B15/01 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/16 , C22C38/20 , C22C38/32 , C22C38/34 , C22C38/60
CPC分类号： H01F1/14791 , B32B15/011 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1272 , C21D8/1283 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/16 , C22C38/20 , C22C38/32 , C22C38/34 , C22C38/60 , C22C2202/02
摘要： There is provided a non-oriented electrical steel sheet having a predetermined chemical composition, in which an area fraction of a crystal structure A composed of crystal grains having a grain size of 100 μm or more is 1% to 30% in a cross section parallel to a rolled plane of the non-oriented electrical steel sheet, an average grain size of a crystal structure B which is a crystal structure other than the crystal structure A is 40 μm or less, and a Vickers hardness HvA of the crystal structure A and a Vickers hardness HvB of the crystal structure B satisfy Equation 1 ((HvA2+HvB2)/2−(HvA+HvB)2/4≤7.0).
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公开(公告)号：US20240096529A1
公开(公告)日：2024-03-21
申请号：US18469882
申请日：2023-09-19
发明人： Zhaopu XU , Xinde HU , Wei LI , Junjia XIANG , Yumeng ZHANG
IPC分类号： H01F1/057 , B22F3/16 , B22F3/24 , B22F9/02 , B22F9/04 , B22F9/08 , C22C33/02 , C22C33/04 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16
CPC分类号： H01F1/0577 , B22F3/16 , B22F3/24 , B22F9/023 , B22F9/04 , B22F9/08 , C22C33/0207 , C22C33/04 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , B22F2003/241 , B22F2003/248 , B22F2009/044 , B22F2201/20 , B22F2202/05 , B22F2301/355 , B22F2998/10 , B22F2999/00 , C22C2202/02
摘要： The present disclosure provides a sintered neodymium-iron-boron permanent magnet, a preparation method and use thereof. The permanent magnet described herein comprises a grain and a grain boundary phase. The grain boundary phase is located on an epitaxial layer of the grain. The grain boundary phase comprises at least an RH. The grain comprises at least Nd2Fe14B. In the grain boundary phase within a depth of 100 μm from the surface to the center of the sintered neodymium-iron-boron permanent magnet, the area of the grain boundary phase with an RH content of more than 6 wt % accounts for 50% or more of the total area of the grain boundary phase. The present disclosure adopts an RH and an RL as the diffusion source for composite diffusion, significantly improving the coercivity of the permanent magnet and the utilization rate of the RH in the diffusion source.
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公开(公告)号：US11926881B2
公开(公告)日：2024-03-12
申请号：US17636714
申请日：2020-06-19
发明人： Yuji Tanaka , Hidekazu Minami , Naoki Takayama , Takako Yamashita
IPC分类号： C21D9/46 , B32B15/01 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/16 , C22C38/28 , C22C38/32 , C22C38/38 , C23C2/28 , C23C2/40
CPC分类号： C21D9/46 , B32B15/013 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/16 , C22C38/28 , C22C38/32 , C22C38/38 , C23C2/29 , C23C2/40 , C21D2211/002 , C21D2211/008 , Y10T428/12799
摘要： A high-strength cold-rolled steel sheet having a high yield ratio and excellent stretch flangeability and a method for manufacturing the steel sheet. The high-strength cold-rolled steel sheet has a chemical composition including, by mass %, C: 0.10 to 0.30%, Si: 0.50 to 2.00%, Mn: 2.5 to 4.0%, P: 0.050% or less, S: 0.020% or less, Al: 0.10% or less, N: 0.01% or less, Ti: 0.100% or less, and B: 0.0003 to 0.0030%, with the balance being Fe and incidental impurities. N and Ti satisfy a specified formula, and the total area fraction of martensite and bainite is 95% or more. The number density of bainite grains having an area of 3 μm2 or more and a carbon concentration of less than 0.7C is 1200 grains/mm2 or less.
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公开(公告)号：US20240079180A1
公开(公告)日：2024-03-07
申请号：US18260088
申请日：2021-12-29
申请人： YANTAI ZHENGHAI MAGNETIC MATERIAL CO., LTD. , JIANGHUA ZHENGHAI MINMETALS ADVANCED MATERIALS CO., LTD.
发明人： Zhiqiang LI , Cong WANG , Pengfei WANG , Rui WEI
IPC分类号： H01F41/02 , B22F3/16 , B22F3/24 , B22F9/02 , B22F9/04 , C22C38/00 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/057
CPC分类号： H01F41/0273 , B22F3/16 , B22F3/24 , B22F9/023 , B22F9/04 , C22C38/002 , C22C38/005 , C22C38/06 , C22C38/10 , C22C38/14 , C22C38/16 , H01F1/0577 , H01F41/0266 , H01F41/0293 , B22F2003/242 , B22F2003/248 , B22F2201/20 , B22F2202/05 , B22F2301/355 , B22F2998/10 , B22F2999/00 , C22C2202/02
摘要： A rare earth permanent magnet, and a preparation method therefor are provided. The rare earth permanent magnet M and the preparation method may effectively improve the grain boundary anisotropy of the magnet, provide more diffusion channels through which a heavy rare earth diffusion source can enter the inside of the magnet, such that the heavy rare earth diffusion source is more effectively diffused into the magnet, the intrinsic coercivity of the magnet is greatly improved, and a magnet N having high intrinsic coercivity is obtained. Using the same amount of a heavy rare earth diffusion source material, the method produces magnet N having high intrinsic coercivity amplification with reduced production costs.
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10.发明公开公开(公告)号：US20240052449A1
公开(公告)日：2024-02-15
申请号：US17766398
申请日：2020-09-25
IPC分类号： C21D9/46 , C22C38/38 , C22C38/16 , C22C38/60 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02 , C21D6/00 , C21D1/18 , C23C2/02 , C25D5/36 , C23C2/40 , C23C2/06 , C25D3/22 , C25D7/06
CPC分类号： C21D9/46 , C22C38/38 , C22C38/16 , C22C38/60 , C22C38/14 , C22C38/12 , C22C38/08 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/008 , C22C38/005 , C22C38/002 , C22C38/001 , C21D8/0205 , C21D8/021 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D1/18 , C23C2/0224 , C25D5/36 , C23C2/40 , C23C2/06 , C25D3/22 , C25D7/0614 , C21D2211/008 , C21D2211/005 , C21D2211/002 , C21D2211/001
摘要： A high strength steel sheet has a yield-point elongation of 1% or greater and a tensile strength of 980 MPa or greater. The high strength steel sheet has a specific chemical composition and microstructure. A ratio of retained austenite grains adjoining a retained austenite grain having a different crystal orientation to total retained austenite grains is 0.60 or greater, the ferrite has an average grain size of 5.0 μm or less, and the retained austenite has an average grain size of 2.0 μm or less. A value obtained by dividing a volume fraction Vγa by a volume fraction Vγb is 0.40 or greater, where the volume fraction Vγa is a volume fraction of retained austenite in a fractured portion of a tensile test specimen after a warm tensile test at 150° C., and the volume fraction Vγb is a volume fraction of retained austenite before the warm tensile test at 150° C.
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