EP4411013A4 - HIGH-STRENGTH AND THICK STEEL SHEET WITH EXCELLENT HOLE FORMABILITY AND DUCTILITY, AND MANUFACTURING METHODS THEREFOR - Google Patents

HIGH-STRENGTH AND THICK STEEL SHEET WITH EXCELLENT HOLE FORMABILITY AND DUCTILITY, AND MANUFACTURING METHODS THEREFOR

Info

Publication number
EP4411013A4
EP4411013A4 EP22873172.5A EP22873172A EP4411013A4 EP 4411013 A4 EP4411013 A4 EP 4411013A4 EP 22873172 A EP22873172 A EP 22873172A EP 4411013 A4 EP4411013 A4 EP 4411013A4
Authority
EP
European Patent Office
Prior art keywords
ductility
strength
steel sheet
manufacturing methods
thick steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22873172.5A
Other languages
German (de)
French (fr)
Other versions
EP4411013A1 (en
Inventor
Kyoung-Rae Cho
Sung-Kyu Kim
Jun-Ho Park
Sang-Ho Han
Jeong-Hun Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Publication of EP4411013A1 publication Critical patent/EP4411013A1/en
Publication of EP4411013A4 publication Critical patent/EP4411013A4/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/02—Winding-up or coiling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/185—Hardening; Quenching with or without subsequent tempering from an intercritical temperature
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/22—Martempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/008—Martensite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)
EP22873172.5A 2021-09-27 2022-09-21 HIGH-STRENGTH AND THICK STEEL SHEET WITH EXCELLENT HOLE FORMABILITY AND DUCTILITY, AND MANUFACTURING METHODS THEREFOR Pending EP4411013A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020210126999A KR102949639B1 (en) 2021-09-27 2021-09-27 High-strength and high-thickness steel sheet having excellent hole expandability and ductility and mathod for manufacturing thereof
PCT/KR2022/014116 WO2023048467A1 (en) 2021-09-27 2022-09-21 High-strength and thick steel sheet having excellent hole expandability and ductility, and manufacturing method therefor

Publications (2)

Publication Number Publication Date
EP4411013A1 EP4411013A1 (en) 2024-08-07
EP4411013A4 true EP4411013A4 (en) 2025-07-16

Family

ID=85720938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22873172.5A Pending EP4411013A4 (en) 2021-09-27 2022-09-21 HIGH-STRENGTH AND THICK STEEL SHEET WITH EXCELLENT HOLE FORMABILITY AND DUCTILITY, AND MANUFACTURING METHODS THEREFOR

Country Status (7)

Country Link
US (1) US20240401164A1 (en)
EP (1) EP4411013A4 (en)
JP (1) JP2024535916A (en)
KR (1) KR102949639B1 (en)
CN (1) CN118103542A (en)
MX (1) MX2024003632A (en)
WO (1) WO2023048467A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133324A (en) * 1983-08-22 1984-07-31 Sumitomo Metal Ind Ltd Manufacture of high-tension cold-rolled steel plate with superior formability
JPH10152728A (en) * 1996-11-25 1998-06-09 Nippon Steel Corp Method for producing cold rolled steel sheet with excellent workability and surface properties
JP2009263686A (en) * 2008-04-22 2009-11-12 Nippon Steel Corp High strength steel sheet having excellent weldability and stretch flange formability
US8828557B2 (en) * 2009-04-28 2014-09-09 Jfe Steel Corporation High strength galvanized steel sheet having excellent formability, weldability, and fatigue properties and method for manufacturing the same
JP2014173111A (en) * 2013-03-07 2014-09-22 Kobe Steel Ltd High strength galvanized steel sheet excellent in moldability and its manufacturing method
KR20160078570A (en) * 2014-12-24 2016-07-05 주식회사 포스코 High strength cold rolled, hot dip galvanized steel sheet with excellent bendability and hole expansion property, and method for production thereof
WO2020145108A1 (en) * 2019-01-09 2020-07-16 Ｊｆｅスチール株式会社 High-strength cold-rolled steel sheet and production method for same
US10941467B2 (en) * 2018-12-18 2021-03-09 Posco Cold-rolled steel sheet with excellent formability, galvanized steel sheet, and manufacturing method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005213640A (en) * 2004-02-02 2005-08-11 Kobe Steel Ltd High-strength cold rolled steel sheet excellent in ductility and stretch-flanging property and manufacturing method for the same
CN101627142B (en) * 2007-02-23 2012-10-03 塔塔钢铁艾默伊登有限责任公司 Cold rolled and continuously annealed high strength steel strip and method for producing said steel
JP5533000B2 (en) * 2010-02-15 2014-06-25 新日鐵住金株式会社 Method for producing galvannealed steel sheet
DE102011117572A1 (en) * 2011-01-26 2012-08-16 Salzgitter Flachstahl Gmbh High-strength multiphase steel with excellent forming properties
WO2015088523A1 (en) * 2013-12-11 2015-06-18 ArcelorMittal Investigación y Desarrollo, S.L. Cold rolled and annealed steel sheet
CN112703265A (en) * 2018-10-04 2021-04-23 日本制铁株式会社 Cold rolled steel sheet
CN109576579A (en) 2018-11-29 2019-04-05 宝山钢铁股份有限公司 It is a kind of with high hole expansibility and compared with the 980MPa grade cold-rolled steel sheet and its manufacturing method of high-elongation

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59133324A (en) * 1983-08-22 1984-07-31 Sumitomo Metal Ind Ltd Manufacture of high-tension cold-rolled steel plate with superior formability
JPH10152728A (en) * 1996-11-25 1998-06-09 Nippon Steel Corp Method for producing cold rolled steel sheet with excellent workability and surface properties
JP2009263686A (en) * 2008-04-22 2009-11-12 Nippon Steel Corp High strength steel sheet having excellent weldability and stretch flange formability
US8828557B2 (en) * 2009-04-28 2014-09-09 Jfe Steel Corporation High strength galvanized steel sheet having excellent formability, weldability, and fatigue properties and method for manufacturing the same
JP2014173111A (en) * 2013-03-07 2014-09-22 Kobe Steel Ltd High strength galvanized steel sheet excellent in moldability and its manufacturing method
KR20160078570A (en) * 2014-12-24 2016-07-05 주식회사 포스코 High strength cold rolled, hot dip galvanized steel sheet with excellent bendability and hole expansion property, and method for production thereof
US10941467B2 (en) * 2018-12-18 2021-03-09 Posco Cold-rolled steel sheet with excellent formability, galvanized steel sheet, and manufacturing method thereof
WO2020145108A1 (en) * 2019-01-09 2020-07-16 Ｊｆｅスチール株式会社 High-strength cold-rolled steel sheet and production method for same

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
HUANG FEI ET AL: "Recrystallisation before austenitization for improved microstructure and properties in automotive steel sheets with high product of strength and elongation", MATERIALS RESEARCH EXPRESS, vol. 8, no. 5, 1 May 2021 (2021-05-01), GB, pages 056510, XP093281493, ISSN: 2053-1591, Retrieved from the Internet <URL:https://iopscience.iop.org/article/10.1088/2053-1591/abfc7a/pdf> DOI: 10.1088/2053-1591/abfc7a *
OGAWA TOSHIO ET AL: "Effect of initial microstructures prior to cold-rolling and intercritical annealing on ferrite recrystallization and ferrite-to-austenite phase transformation in Nb bearing low-carbon steels", JOURNAL OF PHYSICS: CONFERENCE SERIES, vol. 1270, no. 1, 4 August 2019 (2019-08-04), Bristol, GB, pages 012016, XP093279518, ISSN: 1742-6588, Retrieved from the Internet <URL:https://iopscience.iop.org/article/10.1088/1742-6596/1270/1/012016/pdf> DOI: 10.1088/1742-6596/1270/1/012016 *
SCHASTLIVTSEV V M ET AL: "Degradation of the pipe-steel structure upon long-term operation in contact with a hydrogen sulfide-containing medium", THE PHYSICS OF METALS AND METALLOGRAPHY, NAUKA/INTERPERIODICA, MO, vol. 111, no. 3, 29 March 2011 (2011-03-29), pages 281 - 293, XP019890963, ISSN: 1555-6190, DOI: 10.1134/S0031918X11020128 *
See also references of WO2023048467A1 *

Also Published As

Publication number Publication date
US20240401164A1 (en) 2024-12-05
CN118103542A (en) 2024-05-28
EP4411013A1 (en) 2024-08-07
KR102949639B1 (en) 2026-04-08
MX2024003632A (en) 2024-06-24
KR20230045648A (en) 2023-04-05
JP2024535916A (en) 2024-10-02
WO2023048467A1 (en) 2023-03-30

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