EP4159885A4 - 780 mpa-class cold-rolled and annealed dual-phase steel and manufacturing method therefor - Google Patents

780 mpa-class cold-rolled and annealed dual-phase steel and manufacturing method therefor Download PDF

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Publication number
EP4159885A4
EP4159885A4 EP21813104.3A EP21813104A EP4159885A4 EP 4159885 A4 EP4159885 A4 EP 4159885A4 EP 21813104 A EP21813104 A EP 21813104A EP 4159885 A4 EP4159885 A4 EP 4159885A4
Authority
EP
European Patent Office
Prior art keywords
mpa
rolled
manufacturing
method therefor
phase 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
EP21813104.3A
Other languages
German (de)
French (fr)
Other versions
EP4159885A1 (en
EP4159885A9 (en
Inventor
Wei Li
Xiaodong Zhu
Peng XUE
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.)
Baoshan Iron and Steel Co Ltd
Original Assignee
Baoshan Iron and Steel 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 Baoshan Iron and Steel Co Ltd filed Critical Baoshan Iron and Steel Co Ltd
Publication of EP4159885A1 publication Critical patent/EP4159885A1/en
Publication of EP4159885A9 publication Critical patent/EP4159885A9/en
Publication of EP4159885A4 publication Critical patent/EP4159885A4/en
Pending legal-status Critical Current

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Classifications

    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties 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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • 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
    • 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
    • C21D1/26—Methods of 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242—Flattening; Dressing; Flexing
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties 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 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties 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
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • C22C38/04—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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • 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

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  • 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)
EP21813104.3A 2020-05-27 2021-05-25 780 mpa-class cold-rolled and annealed dual-phase steel and manufacturing method therefor Pending EP4159885A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010459214.0A CN113737086A (en) 2020-05-27 2020-05-27 Economical 780 MPa-grade cold-rolled annealed dual-phase steel and manufacturing method thereof
PCT/CN2021/095808 WO2021238917A1 (en) 2020-05-27 2021-05-25 780 mpa-class cold-rolled and annealed dual-phase steel and manufacturing method therefor

Publications (3)

Publication Number Publication Date
EP4159885A1 EP4159885A1 (en) 2023-04-05
EP4159885A9 EP4159885A9 (en) 2023-06-21
EP4159885A4 true EP4159885A4 (en) 2024-04-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21813104.3A Pending EP4159885A4 (en) 2020-05-27 2021-05-25 780 mpa-class cold-rolled and annealed dual-phase steel and manufacturing method therefor

Country Status (6)

Country Link
US (1) US20230203611A1 (en)
EP (1) EP4159885A4 (en)
JP (1) JP7524357B2 (en)
CN (1) CN113737086A (en)
CA (1) CA3180469A1 (en)
WO (1) WO2021238917A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114836606B (en) * 2022-04-01 2023-05-26 山西太钢不锈钢股份有限公司 Economical duplex stainless steel plate, method for improving strength of economical duplex stainless steel plate and application of economical duplex stainless steel plate
CN117660830A (en) * 2022-08-23 2024-03-08 宝山钢铁股份有限公司 100 kg-level cold-rolled low-alloy annealed dual-phase steel and manufacturing method thereof
CN117660831A (en) * 2022-08-23 2024-03-08 宝山钢铁股份有限公司 Dual-phase steel and manufacturing method thereof
CN117660846A (en) * 2022-08-23 2024-03-08 宝山钢铁股份有限公司 120 kg-level cold-rolled low-alloy annealed dual-phase steel and manufacturing method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040238082A1 (en) * 2002-06-14 2004-12-02 Jfe Steel Corporation High strength cold rolled steel plate and method for production thereof
US20120009434A1 (en) * 2008-07-11 2012-01-12 Kabushiki Kaisha Kobe Seiko Sho Cold-rolled steel sheet
US20150027594A1 (en) * 2011-11-15 2015-01-29 Jfe Steel Corporation Thin steel sheet and process for producing the same
CN105925905A (en) * 2016-05-17 2016-09-07 武汉钢铁股份有限公司 Nb-Ti-series 780MPa-class hot-rolled dual-phase steel and production method thereof
US20190112681A1 (en) * 2016-03-31 2019-04-18 Jfe Steel Corporation Steel sheet, plated steel sheet, method for producing hot-rolled steel sheet, method for producing cold-rolled full hard steel sheet, method for producing steel sheet, and method for producing plated steel sheet
US20200115769A1 (en) * 2017-06-30 2020-04-16 Baoshan Iron & Steel Co., Ltd. Low-cost and high-formability 1180 mpa grade cold-rolled annealed dual-phase steel plate and manufacturing method thereof

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3478128B2 (en) * 1998-06-12 2003-12-15 Ｊｆｅスチール株式会社 Method for producing composite structure type high tensile cold rolled steel sheet excellent in ductility and stretch flangeability
JP4235030B2 (en) 2003-05-21 2009-03-04 新日本製鐵株式会社 High-strength cold-rolled steel sheet and high-strength surface-treated steel sheet having excellent local formability and a tensile strength of 780 MPa or more with suppressed increase in hardness of the weld
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
JP4441417B2 (en) 2005-02-14 2010-03-31 新日本製鐵株式会社 High-tensile cold-rolled steel sheet with excellent formability and weldability and method for producing the same
JP4815974B2 (en) 2005-09-29 2011-11-16 Ｊｆｅスチール株式会社 Manufacturing method of high strength cold-rolled steel sheet with excellent rigidity
CN101363099A (en) 2008-09-11 2009-02-11 北京科技大学 Cold rolled dual-phase sheet steel with 1000MPa grade tensile strength and preparation method thereof
CN107406931B (en) * 2015-03-27 2019-04-05 杰富意钢铁株式会社 High-strength steel sheet and its manufacturing method
JP6586776B2 (en) 2015-05-26 2019-10-09 日本製鉄株式会社 High strength steel plate with excellent formability and method for producing the same
CN105420605A (en) * 2015-11-30 2016-03-23 钢铁研究总院 Ultralow-yield-ratio cold-rolled dual-phase steel and manufacturing method thereof
US11118252B2 (en) 2018-03-30 2021-09-14 Nippon Steel Corporation Galvannealed steel sheet
CN109371317B (en) * 2018-09-25 2021-03-02 邯郸钢铁集团有限责任公司 1000 MPa-grade ultra-fast cold-rolled dual-phase steel plate and preparation method thereof
CN118308649A (en) 2020-01-16 2024-07-09 日本制铁株式会社 Hot-stamping forming body

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040238082A1 (en) * 2002-06-14 2004-12-02 Jfe Steel Corporation High strength cold rolled steel plate and method for production thereof
US20120009434A1 (en) * 2008-07-11 2012-01-12 Kabushiki Kaisha Kobe Seiko Sho Cold-rolled steel sheet
US20150027594A1 (en) * 2011-11-15 2015-01-29 Jfe Steel Corporation Thin steel sheet and process for producing the same
US20190112681A1 (en) * 2016-03-31 2019-04-18 Jfe Steel Corporation Steel sheet, plated steel sheet, method for producing hot-rolled steel sheet, method for producing cold-rolled full hard steel sheet, method for producing steel sheet, and method for producing plated steel sheet
CN105925905A (en) * 2016-05-17 2016-09-07 武汉钢铁股份有限公司 Nb-Ti-series 780MPa-class hot-rolled dual-phase steel and production method thereof
US20200115769A1 (en) * 2017-06-30 2020-04-16 Baoshan Iron & Steel Co., Ltd. Low-cost and high-formability 1180 mpa grade cold-rolled annealed dual-phase steel plate and manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2021238917A1 *

Also Published As

Publication number Publication date
EP4159885A1 (en) 2023-04-05
WO2021238917A1 (en) 2021-12-02
JP2023527390A (en) 2023-06-28
JP7524357B2 (en) 2024-07-29
US20230203611A1 (en) 2023-06-29
CA3180469A1 (en) 2021-12-02
EP4159885A9 (en) 2023-06-21
CN113737086A (en) 2021-12-03

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Ipc: C21D 1/26 20060101ALI20240318BHEP

Ipc: C21D 1/19 20060101ALI20240318BHEP

Ipc: C21D 1/18 20060101ALI20240318BHEP

Ipc: C21D 6/00 20060101ALI20240318BHEP

Ipc: C21D 8/02 20060101ALI20240318BHEP

Ipc: C21D 9/46 20060101ALI20240318BHEP

Ipc: C22C 38/00 20060101ALI20240318BHEP

Ipc: C22C 38/06 20060101ALI20240318BHEP

Ipc: C22C 38/14 20060101ALI20240318BHEP

Ipc: C22C 38/12 20060101ALI20240318BHEP

Ipc: C22C 38/02 20060101ALI20240318BHEP

Ipc: C22C 38/04 20060101AFI20240318BHEP