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公开(公告)号：US20240352552A1
公开(公告)日：2024-10-24
申请号：US18685815
申请日：2022-04-20
IPC分类号： C21D9/46 , C21D1/18 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/38 , C22C38/60
CPC分类号： C21D9/46 , C21D1/18 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/007 , C21D6/008 , C21D8/0205 , C21D8/0221 , C21D8/0247 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/20 , C22C38/38 , C22C38/60 , C21D2211/001 , C21D2211/005 , C21D2211/008
摘要： A steel sheet has a chemical composition containing a predetermined amount of C, Si, Mn, Cu, P, S, Al, and N, and optionally a predetermined amount of one or more selected from the group consisting of Ti, B, Nb, Cr, V, Mo, Ni, As, Sb, Sn, Ta, Ca, Mg, Zn, Co, Zr, and REM, with the balance being Fe and inevitable impurities; a microstructure comprising, in volume fraction, tempered martensite: 90% or more, retained austenite: 1% to 7%, one or both of bainitic ferrite and fresh martensite: 3% to 9% in total, and ferrite: 0% to 5%, where the retained austenite has a carbon concentration of 0.35% or more; a tensile strength TS of 1470 MPa to 1650 MPa, and a yield strength YS of 1100 MPa or more.
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公开(公告)号：US12091723B2
公开(公告)日：2024-09-17
申请号：US18011090
申请日：2021-06-30
IPC分类号： C22C33/04 , B23K11/00 , B23K11/11 , B23K11/16 , B32B15/01 , B32B15/04 , B32B15/18 , C21D1/18 , C21D1/19 , C21D1/25 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/38 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58 , C22C38/60 , C23C2/02 , C23C2/06 , C23C2/28 , C23C2/40 , C23C28/00 , C23C28/02 , C23C30/00 , C25D3/22 , C25D5/36 , C25D5/50 , C25D7/06 , B23K101/00 , B23K101/28 , B23K101/34 , B23K103/04
CPC分类号： C21D9/46 , B23K11/0026 , B23K11/11 , B23K11/166 , B32B15/013 , B32B15/015 , B32B15/04 , B32B15/043 , B32B15/18 , C21D1/18 , C21D1/185 , C21D1/19 , C21D1/25 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0273 , C21D8/0278 , C22C33/04 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/20 , C22C38/22 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/34 , C22C38/38 , C22C38/40 , C22C38/42 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C22C38/58 , C22C38/60 , C23C2/02 , C23C2/0224 , C23C2/06 , C23C2/28 , C23C2/285 , C23C2/29 , C23C2/40 , C23C28/021 , C23C28/025 , C23C28/3225 , C23C30/00 , C23C30/005 , C25D3/22 , C25D5/36 , C25D5/50 , C25D7/0614 , B23K2101/006 , B23K2101/28 , B23K2101/34 , B23K2103/04 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , Y10T428/12792 , Y10T428/12951 , Y10T428/12958 , Y10T428/12965 , Y10T428/12972
摘要： A galvanized steel sheet includes: a steel sheet having a chemical composition satisfying an equivalent carbon content Ceq of 0.35% or more and less than 0.60%, and a specified steel microstructure; and a galvanized layer on a surface of the steel sheet. The retained austenite has a solute C content of 0.6% or more by mass, and retained austenite grains with an aspect ratio of less than 2.0 constitute 50% or more of all retained austenite grains. In 90-degree bending at a curvature radius/thickness ratio of 4.2 in a rolling (L) direction with respect to an axis extending in a width (C) direction, an L cross section in a 0 to 50 μm region from a surface of the steel sheet on a compression side has a number density of voids of 1000/mm2 or less, and the galvanized steel sheet has a tensile strength of 590 MPa or more.
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3.发明公开公开(公告)号：US20240287637A1
公开(公告)日：2024-08-29
申请号：US18572182
申请日：2022-05-31
发明人： Hidekazu MINAMI , Yusuke WADA , Yuki TOJI , Takeshi NISHIYAMA , Michitoshi SAEKI
IPC分类号： C21D9/46 , C21D1/18 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/10 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/60
CPC分类号： C21D9/46 , C21D1/18 , C21D6/001 , C21D6/002 , 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 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/26 , C22C38/28 , C22C38/32 , C22C38/38 , C22C38/60 , C21D2211/001 , C21D2211/005 , C21D2211/008
摘要： A high strength steel sheet with a chemical composition containing C, Si, Mn, P, S, Al, N, Nb, Ti, and B, where [% Si]/[% Mn] is 0.10 or more and 0.60 or less, and free Ti content determined from Formula (1), below, is 0.001 mass % or more, with the balance being Fe and inevitable impurity. In a steel sheet surface layer, a total amount of Nb solute and 100 nm or smaller precipitate is 0.002 mass % or more.
free
Ti
content
(
%
)
=
[
%
Ti
]
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(
47.9
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14.
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×
[
%
N
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(
47.9
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32.1
)
×
[
%
S
]
(
1
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4.发明公开公开(公告)号：US20240279763A1
公开(公告)日：2024-08-22
申请号：US18570067
申请日：2022-06-30
IPC分类号： C21D9/46 , B21B3/02 , C21D1/18 , C21D6/00 , C21D8/12 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/60 , H01F1/147
CPC分类号： C21D9/46 , B21B3/02 , C21D1/18 , C21D6/001 , C21D6/002 , C21D6/004 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1261 , C21D8/1266 , C21D8/1272 , C21D8/1283 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/16 , C22C38/20 , C22C38/22 , C22C38/32 , C22C38/34 , C22C38/42 , C22C38/60 , H01F1/14783 , C21D2201/05 , C22C2202/02
摘要： To provide a method of producing a grain-oriented electrical steel sheet that can stably produce a grain-oriented electrical steel sheet with low iron loss and little variation in iron loss using a tandem mill. Disclosed is a method of producing a grain-oriented electrical steel sheet, including: hot rolling; a single cycle of cold rolling, or multiple cycles of cold rolling with intermediate annealing in between; decarburization annealing; and secondary recrystallization annealing, in which annealing preceding final cold rolling is performed with an average cooling rate of 20° C./s or higher in a temperature range from 800° C. to 350° C., and the final cold rolling is performed using a tandem mill, where the steel sheet is heated to a temperature range from 70° C. to 200° C. and then cooled to 60° C. or lower within 10 seconds before being introduced into the first pass of the tandem mill.
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公开(公告)号：US12065193B2
公开(公告)日：2024-08-20
申请号：US17623111
申请日：2020-06-26
发明人： Mai Nagano , Shigeru Yonemura , Akihiro Uenishi
IPC分类号： B62D25/04 , B21D53/88 , B60R19/34 , B62D21/15 , B62D25/02 , B62D25/06 , B62D25/08 , B62D25/20 , B62D29/00 , C21D6/00 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/38 , F16F7/12
CPC分类号： B62D25/04 , B21D53/88 , B60R19/34 , B62D21/15 , B62D25/025 , B62D25/06 , B62D25/20 , B62D29/007 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/38 , F16F7/12 , C21D2211/008
摘要： A shock absorbing member which can increase impact absorption energy and also enables thinning of a steel sheet that is a starting material, a method for producing the shock absorbing member, and a method for producing a steel sheet for cold plastic working are provided. The shock absorbing member includes a ridge portion formed in a curved shape as viewed from a longitudinal direction, and a wall portion extending from the ridge portion. In the wall portion, a ratio σ5/τ5 between a tensile stress σ5 when an elongation in a tensile test is 5% and a shear stress τ5 when a shear strain in a shear test is 5√3% is 1.70 or less, or a ratio σ10/τ10 between a tensile stress σ10 when an elongation in a tensile test is 10% and a shear stress τ10 when a shear strain in a shear test is 10√3% is 1.70 or less.
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公开(公告)号：US20240218491A1
公开(公告)日：2024-07-04
申请号：US18288223
申请日：2021-04-27
IPC分类号： C22C38/38 , C21D1/74 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/34 , C23C2/06
CPC分类号： C22C38/38 , C21D1/74 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0252 , C21D8/0263 , C21D8/0278 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/34 , C23C2/06
摘要： A steel sheet comprising, by mass %, C: 0.05 to 0.40%, Si: 0.2 to 3.0%, and Mn: 0.1 to 5.0%, wherein a surface layer of the steel sheet contains grain boundary oxides, a Ratio A of a length of the grain boundary oxides projected on a surface of the steel sheet to a length of the surface of the steel sheet is 50% or more and 100% or less, a number density of granular oxides is less than 4.0/μm2, the steel sheet comprises an Si—Mn depleted layer having a thickness of 3.0 μm or more from the surface of the steel sheet, and Si and Mn contents of the Si—Mn depleted layer at the ½ position of the thickness and not containing oxides are respectively less than 10% of the Si and Mn contents at a sheet thickness center part of the steel sheet, and a plated steel sheet using the same are provided.
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公开(公告)号：US20240167114A1
公开(公告)日：2024-05-23
申请号：US18283055
申请日：2022-03-23
发明人： Hiroshi Hasegawa , Hideyuki Kimura , Yukio Tatara
IPC分类号： C21D9/46 , B21B1/22 , C21D1/18 , C21D6/00 , C21D8/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/60
CPC分类号： C21D9/46 , B21B1/22 , C21D1/18 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0247 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/60 , B21B2001/225 , C21D2211/005 , C21D2211/009
摘要： A hot-rolled steel sheet has a chemical composition containing, by mass %, C: 0.10% or less, Si: 2.0% or less, Mn: 2.0% or less, P: 0.100% or less, S: 0.02% or less, Al: 1.5% or less, and O: 0.0025% or less, the balance being Fe and incidental impurities, in which a main phase is ferrite, and a maximum orientation density of grains is 2.1 or less.
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公开(公告)号：US20240154472A1
公开(公告)日：2024-05-09
申请号：US18278761
申请日：2022-03-30
发明人： Tesshu MURAKAWA , Yoshiaki NATORI
IPC分类号： H02K1/02 , C21D6/00 , C21D8/12 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/16 , C22C38/34 , C22C38/60 , H01F1/147 , H01F41/02
CPC分类号： H02K1/02 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/1222 , C21D8/1233 , C21D8/1261 , C21D8/1277 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/004 , C22C38/005 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/14 , C22C38/16 , C22C38/34 , C22C38/60 , H01F1/14783 , H01F41/02 , C22C2202/02
摘要： The rotating electrical machine includes a stator, a rotor, and a casing that accommodates the stator and the rotor, in which at least one of the following conditions 1 and 2 is satisfied.
Condition 1: a thermal conductivity A of a non-oriented electrical steel sheet that is used for a core of the stator is in a range of 12 to 35 W/(m·K), a thermal conductivity B of a non-oriented electrical steel sheet that is used for a core of the rotor is in a range of 10 to 33 W/(m·K), and both the thermal conductivities have a relationship of an expression (1) of A>B
Condition 2: a thermal diffusivity A1 of the non-oriented electrical steel sheet that is used for the core of the stator is in a range of 3.0×10−6 to 9.0×10−6 m2/sW/(m·K), a thermal diffusivity B1 of the non-oriented electrical steel sheet that is used for the core of the rotor is in a range of 2.5×10−6 to 8.5×10−6 m2/sW/(m·K), and both the thermal diffusivities have a relationship of an expression (3) of A1>B1-
公开(公告)号：US20240150882A1
公开(公告)日：2024-05-09
申请号：US18548927
申请日：2022-02-25
发明人： Satoshi MAEDA , Hiromi YOSHITOMI , Masaki KOBA , Nao KAWABE , Tatsuya NAKAGAITO , Katsuya HOSHINO , Hiroshi MATSUDA
IPC分类号： C22C38/60 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/38 , C23C2/06 , C23C2/28
CPC分类号： C22C38/60 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0226 , C21D8/0236 , C21D8/0263 , C21D8/0278 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/008 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/38 , C23C2/06 , C23C2/285
摘要： To provide a galvanized steel sheet having high strength, specifically, a tensile strength of 1,150 MPa or more, and excellent resistance spot weldability, a base steel sheet has a defined chemical composition, an amount of diffusible hydrogen in the base steel sheet is 0.20 mass ppm or less, and surface roughness Ra of the galvanized steel sheet is 0.6 μm or less.
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公开(公告)号：US20240141469A1
公开(公告)日：2024-05-02
申请号：US18272712
申请日：2022-03-14
IPC分类号： C23C2/06 , C21D6/00 , C21D8/02 , C21D9/46 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/38 , C23C2/02 , C23C2/16 , C23C2/28
CPC分类号： C23C2/06 , C21D6/001 , C21D6/002 , C21D6/005 , C21D6/008 , C21D8/0205 , C21D8/0236 , C21D8/0252 , C21D8/0278 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/38 , C23C2/022 , C23C2/16 , C23C2/285
摘要： High strength plated steel sheet having high hydrogen embrittlement resistance, that is, alloyed hot dip galvannealed steel sheet including steel sheet containing C: 0.05 to 0.40%, Si: 0.2 to 3.0%, Mn: 0.1 to 5.0%, and sol. Al: 0.4 to 1.50% and a alloyed hot dip galvannealed layer deposited on at least one surface of the steel sheet to 10 to 100 g/m2 and containing Fe: 5.0 to 15.0% and Al: 0.01 to 1.0%, having an internal oxidation layer including grain boundary oxides in a surface layer of the steel sheet, when examining a cross-section of a surface layer of the steel sheet, a Ratio A of the length of the grain boundary oxides projected an interface of the steel sheet and the alloyed hot dip galvannealed layer to the length of interface is 50% or more and 100% or less, and a surface depleted layer with a steel composition not including the grain boundary oxides which satisfies, by mass %, Si≤0.6% and Al≥0.05% is included at a depth of ½ of the average depth of the internal oxidation layer.
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