公开(公告)号：US20240158883A1

公开(公告)日：2024-05-16

申请号：US18549920

申请日：2022-02-28

Applicant: JFE STEEL CORPORATION

Inventor： Shimpei YOSHIOKA ,  Shinjiro KANEKO ,  Yuma HONDA

IPC: C21D9/46 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/60

CPC classification number: C21D9/46 ,  C21D1/18 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  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 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/60 ,  C21D2211/008

Abstract: To provide a steel sheet with a tensile strength of 1310 MPa or more that can achieve excellent press formability in a steel having a martensite-dominant microstructure with excellent delayed fracture resistance properties. Disclosed is a steel sheet including: a chemical composition containing, by mass %, C: 0.12-0.40%, Si: 1.5% or less, Mn: 1.7% or less, P: 0.05% or less, S: 0.010% or less, sol.Al: 1.00% or less, N: 0.010% or less, Ti: 0.002-0.080%, and B: 0.0002-0.0050%, with the balance being Fe and inevitable impurities; a metallic structure in which an area ratio of martensite to an entire microstructure is 95% or more, and a ratio LS/LB satisfies a predetermined formula (1), where LS denotes a length of a sub-block boundary and LB denotes a length of a block boundary; and a tensile strength of 1310 MPa or more.

公开(公告)号：US20240158881A1

公开(公告)日：2024-05-16

申请号：US18282304

申请日：2022-03-15

Applicant: JFE Steel Corporation

Inventor： Thi Huyen Doan ,  Hiroshi Hasegawa ,  Hideyuki Kimura

IPC: C21D9/46 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60

CPC classification number: C21D9/46 ,  C21D1/84 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0247 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008

Abstract: The high-strength steel sheet has a predetermined chemical composition and has a microstructure containing a specific microstructure in a surface layer region and in an inner region. The surface layer region has an average grain size of 6 μm or less. A difference between a hardness of the surface layer region extending from the surface of the steel sheet to the position of one-tenth of the thickness of the steel sheet and a hardness of the inner region is 5% or more and 15% or less of [0.3×tensile strength (MPa)], and the steel sheet has a tensile strength of 980 MPa or more, a uniform elongation of 6% or more, and a ratio of a critical bending radius to a thickness of 1.5 or less.

公开(公告)号：US20240154208A1

公开(公告)日：2024-05-09

申请号：US18274995

申请日：2022-02-04

Applicant: NIPPON STEEL CORPORATION

Inventor： Kyohei MIYAKE ,  Atsuo KOGA ,  Kohei UEDA ,  Yutaka MIKAZUKI ,  Katsunari NORITA ,  Sho MATSUI ,  Takashi OKE

IPC: H01M10/6556 ,  B32B15/01 ,  C21D8/02 ,  C21D9/46 ,  C22C21/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C23C2/12 ,  C23C2/20 ,  C23C2/28 ,  C23C2/40 ,  H01M10/613 ,  H01M10/6554 ,  H01M10/6568 ,  H01M50/224 ,  H01M50/231 ,  H01M50/24

CPC classification number: H01M10/6556 ,  B32B15/012 ,  C22C21/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  H01M10/613 ,  H01M10/6554 ,  H01M10/6568 ,  H01M50/224 ,  H01M50/231 ,  H01M50/24 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/46 ,  C23C2/12 ,  C23C2/20 ,  C23C2/28 ,  C23C2/40 ,  H01M2220/20

Abstract: This battery unit is a battery unit including a battery pack that houses a battery cell, and a water-cooling medium flow path formed outside a bottom surface of the battery pack, in which the water-cooling medium flow path of the battery pack is made of an Al-based plated steel sheet.

公开(公告)号：US20240150875A1

公开(公告)日：2024-05-09

申请号：US18284334

申请日：2022-03-28

Applicant: JFE Steel Corporation

Inventor： Ryosuke Tani ,  Takeshi Imamura ,  Shigehiro Takajo ,  Hiroi Yamaguchi

IPC: C22C38/02 ,  C21D6/00 ,  C21D8/12 ,  C21D9/46 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06

CPC classification number: C22C38/02 ,  C21D6/008 ,  C21D8/1222 ,  C21D8/1233 ,  C21D8/1261 ,  C21D8/1272 ,  C21D8/1283 ,  C21D9/46 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06 ,  C21D2201/05

Abstract: Proposed is a method for producing a grain-oriented electrical steel sheet that comprises heating a steel material containing a certain composition and inhibitor-forming ingredients to a temperature in a range of 1300 to 1400° C.; performing hot rolling, hot-band annealing, and cold rolling on the material to obtain a cold-rolled sheet; performing decarburization annealing also serving as primary recrystallization annealing on the cold-rolled sheet; subsequently applying an annealing separator to a surface of the steel sheet; and performing finishing annealing followed by applying an insulation coating. In the method, rapid heating is conducted from 500 and 700° C. in a heating process of the decarburization annealing at a rate of 100 to 1000° C./s while gradual heating is conducted from 860 to 970° C. in a heating process of the finishing annealing at a heating rate of 0.5 to 4.0° C./hr for at least 10 hours.

公开(公告)号：US20240150863A1

公开(公告)日：2024-05-09

申请号：US18284038

申请日：2022-02-07

Applicant: NIPPON STEEL CORPORATION

Inventor： Katsuya NAKANO

IPC: 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 ,  C22C38/26 ,  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 classification number: 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 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  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

Abstract: Steel sheet able to reduce die damage at the time of cold pressing, 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.

公开(公告)号：US20240150862A1

公开(公告)日：2024-05-09

申请号：US18281812

申请日：2022-03-16

Applicant: JFE Steel Corporation

Inventor： Kazuki Matsubara ,  Shusaku Takagi ,  Hiroshi Okano

IPC: C21D9/14 ,  C21D8/10 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: C21D9/14 ,  C21D8/105 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D2211/001

Abstract: A steel pipe for high-pressure hydrogen, the steel pipe having a chemical composition containing, by mass %, C: 0.05% to 0.60%, Si: 0.001% to 2.0%, Mn: 0.01% to 5.0%, P: 0.030% or less, S: 0.010% or less, N: 0.010% or less, Al: 0.0001% to 1.00%, 0: 0.010% or less, H: 0.00010% or less, and a balance of Fe and incidental impurities and a metallic microstructure including, in terms of area fraction, 3% or less (including 0%) of retained austenite, in which the number of inclusions having an aspect ratio of 2.0 or more and a length of 10 μm or more is 15/100 mm2 or less.

公开(公告)号：US20240149322A1

公开(公告)日：2024-05-09

申请号：US18400526

申请日：2023-12-29

Applicant: Hyundai Steel Company

Inventor： Chang Yong Lee ,  Sung Ryul Kim ,  Jeong Seok Kim ,  Joo Sik Hyun ,  Yoo Dong Chung ,  Soon Geun Jang

IPC: B21D22/02 ,  B23K26/21 ,  B23K35/02 ,  B23K35/30 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: B21D22/022 ,  B23K26/21 ,  B23K35/0261 ,  B23K35/3073 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  B23K2101/185

Abstract: According to an exemplary embodiment of the present disclosure, disclosed is an aluminum coated blank that includes a first coated steel sheet; a second coated steel sheet connected to the first coated steel sheet; and a joint portion that connects the first coated steel sheet to the second coated steel plate at a boundary between the first coated steel sheet and the second coated steel sheet.

公开(公告)号：US11979057B2

公开(公告)日：2024-05-07

申请号：US17594198

申请日：2020-04-21

Applicant: NIPPON STEEL CORPORATION

Inventor： Nao Otaki ,  Hirokazu Okada ,  Yasutaka Noguchi ,  Kenji Imanishi ,  Masahiro Tasaka

IPC: H02K1/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/54 ,  H02K49/04

CPC classification number: H02K1/02 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/54 ,  H02K49/043

Abstract: A cylindrical part of a rotor for an eddy current deceleration device of the present embodiment has a chemical composition consisting of, by mass %, C: 0.05 to 0.15%, Si: 0.10 to 0.40%, Mn: 0.50 to 1.00%, P: 0.030% or less, S: 0.030% or less, Mo: 0.20 to 1.00%, Nb: 0.020 to 0.060%, V: 0.040 to 0.080%, sol. Al: 0.030 to 0.100%, B: 0.0005 to 0.0050%, N: 0.003 to 0.010%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Cr: 0 to 0.10%, and the balance: Fe and impurities, and in which the total area fraction of martensite and bainite in a microstructure is more than 95.0%, and the number density of carbides having an equivalent circular diameter of 100 to 500 nm is 0.35 to 0.75 particles/μm2.

公开(公告)号：US11975375B2

公开(公告)日：2024-05-07

申请号：US17110707

申请日：2020-12-03

Applicant: Hyundai Steel Company

Inventor： Chang Yong Lee ,  Sung Ryul Kim ,  Jeong Seok Kim ,  Joo Sik Hyun ,  Yoo Dong Chung ,  Soon Geun Jang

IPC: B21D22/02 ,  B23K26/21 ,  B23K35/02 ,  B23K35/30 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  B23K101/18 ,  B23K103/04

CPC classification number: B21D22/022 ,  B23K26/21 ,  B23K35/0261 ,  B23K35/3073 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  B23K2101/185 ,  B23K2103/04 ,  C21D2211/008

Abstract: According to an exemplary embodiment of the present disclosure, disclosed is an aluminum coated blank that includes a first coated steel sheet; a second coated steel sheet connected to the first coated steel sheet; and a joint portion that connects the first coated steel sheet to the second coated steel plate at a boundary between the first coated steel sheet and the second coated steel sheet.

公开(公告)号：US20240141466A1

公开(公告)日：2024-05-02

申请号：US18407928

申请日：2024-01-09

Applicant: Sandvik Intellectual Property AB

Inventor： Daniel GULLBERG ,  Christina HARALDSSON ,  Anders WILSON ,  Alexander SCHEERDER ,  Kirk OFEI

IPC: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  C07C273/04 ,  C21D6/00 ,  C21D8/00 ,  C21D9/08 ,  C22C33/02 ,  C22C33/04 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/08

CPC classification number: C22C38/44 ,  B01D3/32 ,  B01J19/02 ,  C07C273/04 ,  C21D6/004 ,  C21D8/005 ,  C21D9/08 ,  C22C33/0285 ,  C22C33/04 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/58 ,  F28F21/083 ,  B22F3/15 ,  C21D2211/001 ,  C21D2211/005

Abstract: A corrosion resistant duplex stainless steel (ferritic austenitic alloy) is suitable for use in a plant for the production of urea. Uses of the corrosion resistant duplex stainless steel include in objects made of said duplex stainless steel, in methods for the production of urea, in a plant for the production of urea comprising one or more parts made from said duplex stainless steel, and in methods of modifying an existing plant for the production of urea. In one aspect, the composition consists of in weight % (wt %): C 0.010 to 0.015; S 0.08 to 0.23; Mn 1.0 to 1.05; Cr 29.07 to 29.92; Ni 5.76 to 7.17; Mo 3.0 to 4.0; W max 2.55; N 0.3 to 0.35; Cu max 0.01; S max 0.008; P max 0.008; at least one of Ti, Nb, Hf, Ca, Ba, V, and B max 0.5 total; balance Fe and unavoidable occurring impurities.