公开(公告)号：US20240352551A1

公开(公告)日：2024-10-24

申请号：US18684593

申请日：2022-08-25

Applicant: POSCO CO., LTD

Inventor： Young-Roc IM ,  Sang-Ho UHM ,  Young-Ha KIM

IPC: C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC classification number: C21D9/46 ,  C21D1/18 ,  C21D1/84 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C21D8/0278 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: Provided is a cold-rolled steel sheet including: by weight %, C: 0.10 to 0.16%, Si: 0.3 to 0.8%, Al: 0.01 to 0.5%, Mn: 2.0 to 3.0%, Cr: 0.001 to 0.5%, Mo: 0.001 to 0.5%, B: 0.0001 to 0.001%, Nb: 0.001 to 0.05%, Ti: 0.001 to 0.05%, P: 0.04% or less (excluding 0%), S: 0.01% or less (excluding 0%), N: 0.01% or less (excluding 0%), a remainder of Fe, and other unavoidable impurities, as a microstructure, by area %, ferrite: 10% or less (excluding 0%), retained austenite: more than 1% to 5% or less, martensite: 25% or more but less than 50%, and bainite: 35% or more but less than 70%. An average size of martensite-austenite (MA) in the bainite is 0.35 to 0.55 μm.

公开(公告)号：US12123070B2

公开(公告)日：2024-10-22

申请号：US17299308

申请日：2019-11-27

Applicant: JFE STEEL CORPORATION

Inventor： Keishi Inoue ,  Hidetaka Kawabe ,  Masataka Yoshino ,  Mitsuyuki Fujisawa

IPC: C21D9/46 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60

CPC classification number: C21D9/46 ,  C21D6/004 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50 ,  C22C38/52 ,  C22C38/54 ,  C22C38/60 ,  C21D2211/005

Abstract: A ferritic stainless steel sheet has a predetermined chemical composition and thickness, and has an area ratio of crystal grains of 45 μm or more in grain size of 20% or less.

公开(公告)号：US12116672B2

公开(公告)日：2024-10-15

申请号：US17596389

申请日：2020-04-24

Applicant: JFE STEEL CORPORATION

Inventor： Akito Mizutani ,  Mitsuyuki Fujisawa

IPC: C23C2/12 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/50 ,  C23C2/26 ,  C23C2/28 ,  C23C2/40

CPC classification number: C23C2/12 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/44 ,  C22C38/50 ,  C23C2/261 ,  C23C2/28 ,  C23C2/29 ,  C23C2/40 ,  C21D2211/005

Abstract: Provided is an Al or Al alloy-coated stainless steel sheet having a coating substrate and a hot-dip Al or Al alloy coated layer provided on a surface of the coating substrate, the coating substrate having a predetermined chemical composition, the Mo content and W content of the chemical composition of the coating substrate, the thickness of the coating substrate, and the thickness of the hot-dip Al or Al alloy coated layer satisfying predetermined relations.

公开(公告)号：US20240337000A1

公开(公告)日：2024-10-10

申请号：US18580976

申请日：2022-07-14

Applicant: ThyssenKrupp Steel Europe AG

Inventor： Bernd Linke ,  Michael Belde

IPC: C22C38/04 ,  C21D6/00 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/18

CPC classification number: C22C38/04 ,  C21D6/002 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D9/46 ,  C22C38/001 ,  C22C38/02 ,  C22C38/18 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2211/009

Abstract: A process for producing a cold-rolled flat steel product having a bainitic base microstructure and a correspondingly cold-rolled flat steel product having a bainitic base microstructure.

公开(公告)号：US20240327964A1

公开(公告)日：2024-10-03

申请号：US18697571

申请日：2022-05-10

Applicant: ANGANG STEEL COMPANY LIMITED

Inventor： Yong WANG ,  Chu WANG ,  Jiangtao DUAN ,  Diandong SUN ,  Jingong CONG ,  Liming LI ,  Jie CHEN ,  Fangfang AI ,  Shaoguang SUN

IPC: C22C38/50 ,  C21D1/28 ,  C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/48

CPC classification number: C22C38/50 ,  C21D1/28 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0273 ,  C21D9/46 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44 ,  C22C38/48 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009

Abstract: The present invention provides a steel plate for an advanced nuclear power unit evaporator and a manufacturing method for the steel plate. The steel plate includes the following components in percentage by mass: 0.10%-0.14% of C, 0.10%-0.25% of Si, 0.25%-0.50% of Mn, P≤0.006%, S≤0.002%, 1.80%-2.10% of Cr, 1.00%-1.35% of Mo, 0.80%-1.20% of Ni, 0%-0.04% of Nb, 0.05%-0.10% of V, 0.03%-0.06% of Ti, 0%-0.02% of Alt, 0.001%-0.004% of Ca, 0.01%-0.03% of N, Sn≤0.001%, H≤0.0001%, and O≤0.0020%, with the balance being Fe and inevitable impurities, wherein a high temperature temper embrittlement resistance coefficient J=(Si+Mn)×(P+Sn)×104≤50. The provided process procedures can ensure the comprehensive performance requirements of the steel plate for an advanced nuclear power unit evaporator.

公开(公告)号：US20240327944A1

公开(公告)日：2024-10-03

申请号：US18411282

申请日：2024-01-12

Applicant: Primetals Technologies Austria GmbH

Inventor： Kerstin BAUMGARTNER ,  Simon GROSSEIBER ,  Axel RIMNAC ,  Gero SCHWARZ

IPC: C21D9/52 ,  B21B1/26 ,  B22D11/00 ,  B22D11/14 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

CPC classification number: C21D9/52 ,  B21B1/26 ,  B22D11/001 ,  B22D11/141 ,  C21D1/18 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0221 ,  C21D8/0247 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005

Abstract: A process for production of a TRIP steel strip that includes



supplying a finished strip to a first cooling group of a cooling sector to force-cool the core of the finished strip to a second exit temperature (TA2) in the range 620° C. to 700° C., whereby, upon exiting the first cooling group, the core has a predominantly austenitic microstructure, transporting the finished strip to a third cooling group establishing, during the transport, a second cooling rate of the core of the finished strip in the range −25 K/s to 20 K/s to convert a first portion of the austenitic microstructure into a ferritic microstructure, force-cooling the core of the finished strip in the third cooling group to a third exit temperature (TA3) which is not more than the bainite starting temperature (BS) to at least partially convert a second portion of the austenite into a bainitic microstructure.

公开(公告)号：US20240326399A1

公开(公告)日：2024-10-03

申请号：US18353843

申请日：2023-07-17

Applicant: POSCO CO., LTD

Inventor： Tae-Jin SONG ,  Min-Seo KOO

IPC: B32B38/00 ,  B23K20/04 ,  B23K20/227 ,  B23K20/24 ,  B23K31/02 ,  B23K101/16 ,  B23K101/18 ,  B23K103/04 ,  B23K103/18 ,  B32B15/01 ,  B32B15/04 ,  B32B15/18 ,  C21D1/18 ,  C21D1/25 ,  C21D8/02 ,  C21D8/04 ,  C21D9/48 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/40 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/06 ,  C23C2/12 ,  C23C2/18 ,  C23C2/34 ,  C23C2/40 ,  C23C30/00

CPC classification number: B32B38/004 ,  B23K20/04 ,  B23K20/227 ,  B23K20/24 ,  B23K31/02 ,  B32B15/01 ,  B32B15/011 ,  B32B15/015 ,  B32B15/04 ,  B32B15/043 ,  B32B15/18 ,  C21D1/18 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/041 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D8/0473 ,  C21D9/48 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/18 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/40 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C23C2/02 ,  C23C2/022 ,  C23C2/024 ,  C23C2/026 ,  C23C2/06 ,  C23C2/12 ,  C23C2/18 ,  C23C2/34 ,  C23C2/40 ,  C23C30/00 ,  C23C30/005 ,  B23K2101/16 ,  B23K2101/18 ,  B23K2103/04 ,  B23K2103/18 ,  B32B15/012 ,  B32B15/013 ,  B32B2038/0048 ,  B32B2250/03 ,  B32B2250/40 ,  B32B2307/536 ,  B32B2307/552 ,  B32B2307/72 ,  C21D1/25 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C21D2251/02 ,  C22C38/04 ,  Y10T428/12451 ,  Y10T428/12493 ,  Y10T428/12729 ,  Y10T428/12757 ,  Y10T428/12799 ,  Y10T428/12958 ,  Y10T428/12965 ,  Y10T428/12972 ,  Y10T428/12979 ,  Y10T428/12993 ,  Y10T428/2495 ,  Y10T428/24959 ,  Y10T428/24967 ,  Y10T428/24992 ,  Y10T428/26 ,  Y10T428/263 ,  Y10T428/264 ,  Y10T428/265

Abstract: A method of manufacturing a low-density clad steel sheet, including: preparing a base material, a lightweight steel sheet including C: 0.3 to 1.0%, Mn: 4.0 to 16.0%, Al: 4.5 to 9.0%, and Fe; preparing cladding materials, each being martensitic carbon steel including C: 0.1 to 0.45%, Mn: 0.1 to 3.0%, and Fe; disposing the base material between the cladding materials to obtain a laminate; welding an edge of the laminate, and heating the welded laminate to 1050 to 1350° C.; finish-rolling the heated laminate to 750 to 1050° C. with a rolling reduction ratio of 30% or more in a first pass, to obtain a hot-rolled steel sheet; coiling the hot-rolled steel sheet at 400 to 700° C.; applying a cold-reduction ratio of 35 to 90% to obtain a cold-rolled steel sheet; and annealing the cold-rolled steel sheet at 550° C. or higher and A3+200° C. or lower of the cladding materials.

公开(公告)号：US12104255B2

公开(公告)日：2024-10-01

申请号：US17866628

申请日：2022-07-18

Applicant: ArcelorMittal

Inventor： Tiago Machado Amorim ,  Christian Allely ,  Gregory Leuillier

IPC: C23C2/12 ,  C21D1/673 ,  C21D8/00 ,  C21D8/02 ,  C23C2/06 ,  C23C2/26 ,  C23C2/28 ,  C22C21/10 ,  C22F1/053 ,  C23C22/07

CPC classification number: C23C2/12 ,  C21D1/673 ,  C21D8/0257 ,  C23C2/06 ,  C23C2/26 ,  C23C2/261 ,  C23C2/28 ,  C23C2/29 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A hardened part coated with a phosphatable coating is provided. The part is made by a method that includes providing a steel sheet pre-coated with a metallic coating including from 4.0 to 20.0% by weight of zinc, from 1.0 to 3.5% by weight of silicon, optionally from 1.0 to 4.0% by weight of magnesium, and optionally additional elements chosen from Pb, Ni, Zr, or Hf, the content by weight of each additional element being less than 0.3% by weight, the balance being aluminum and unavoidable impurities and residuals elements. The steel sheet is cut to obtain a blank, the blank is thermally treated at a temperature between 840 and 950° C. to obtain a fully austenitic microstructure in the steel, the blank is transferred into a press tool and hot-formed to obtain a part. The part is cooled to obtain a martensitic or martensitic-bainitic microstructure or made of at least 75% of equiaxed ferrite, from 5 to 20% of martensite and bainite in amount less than or equal to 10%.

公开(公告)号：US20240318287A1

公开(公告)日：2024-09-26

申请号：US18579575

申请日：2022-03-18

Applicant: JFE STEEL CORPORATION

Inventor： Sho HIGUCHI ,  Yoshiyasu KAWASAKI ,  Tatsuya NAKAGAITO ,  Takako YAMASHITA ,  Tomomi KANAZAWA ,  Shunsuke YAMAMOTO

IPC: C22C38/04 ,  C21D6/00 ,  C21D8/02 ,  C22C38/02 ,  C22C38/06 ,  C23C2/06 ,  C23C2/28

CPC classification number: C22C38/04 ,  C21D6/005 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C22C38/02 ,  C22C38/06 ,  C23C2/06 ,  C23C2/29 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008

Abstract: A galvanized steel sheet combining high strength with excellent formability, specifically, excellent ductility, hole expansion formability, local ductility, strain hardenability, and dimensional accuracy when forming a member. The base steel sheet has a defined chemical composition and a steel microstructure as follows: ferrite area ratio: 35.0% or more and 95.0% or less, bainitic ferrite area ratio: 1.0% or more and 40.0% or less, tempered martensite area ratio: 50.0% or less (including 0%), retained austenite area ratio: 1.5% or more, fresh martensite area ratio: 20.0% or less (including 0 %), SBF+STM+2×SMA: 10.0% or more and less than 65.0%, SBF+STM: 3.0 % or more and 60.0% or less, SMA1/SMA: 0.40 or less, IDR [% Cγ]: 0.16% or more, and tensile strength: 590 MPa or more and less than 980 MPa.

公开(公告)号：US20240309483A1

公开(公告)日：2024-09-19

申请号：US18604910

申请日：2024-03-14

Applicant: Cleveland-Cliffs Steel Properties Inc.

Inventor： Fusheng Sun ,  Grant A. Thomas ,  Laura A. Burroughs

IPC: C21D9/46 ,  C21D1/18 ,  C21D6/00 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

CPC classification number: C21D9/46 ,  C21D1/18 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008

Abstract: An ultra-high strength steel has improved processing windows for galvanizing and galvannealing though a novel alloying concept. In addition to the alloying concept, the steel includes ferrite and overaged martensite microstructures that are strengthened, and a volume fraction of the magnetic phases is controlled. The steel can be processed to sheet form and galvanized and galvannealed.