EP4159886A4 - Ultrahigh-strength dual-phase steel and manufacturing method therefor - Google Patents

Ultrahigh-strength dual-phase steel and manufacturing method therefor Download PDF

Info

Publication number
EP4159886A4
EP4159886A4 EP21813825.3A EP21813825A EP4159886A4 EP 4159886 A4 EP4159886 A4 EP 4159886A4 EP 21813825 A EP21813825 A EP 21813825A EP 4159886 A4 EP4159886 A4 EP 4159886A4
Authority
EP
European Patent Office
Prior art keywords
ultrahigh
manufacturing
method therefor
phase steel
strength dual
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
EP21813825.3A
Other languages
German (de)
French (fr)
Other versions
EP4159886A1 (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 EP4159886A1 publication Critical patent/EP4159886A1/en
Publication of EP4159886A4 publication Critical patent/EP4159886A4/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • 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
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment 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
    • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
    • 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
    • C21D8/0236—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 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
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface 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
    • 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
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/22—Electroplating: Baths therefor from solutions of zinc
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
    • 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
    • C21D2211/004—Dispersions; Precipitations
    • 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)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
EP21813825.3A 2020-05-27 2021-05-25 Ultrahigh-strength dual-phase steel and manufacturing method therefor Pending EP4159886A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010459510.0A CN113737087B (en) 2020-05-27 2020-05-27 Ultrahigh-strength dual-phase steel and manufacturing method thereof
PCT/CN2021/095807 WO2021238916A1 (en) 2020-05-27 2021-05-25 Ultrahigh-strength dual-phase steel and manufacturing method therefor

Publications (2)

Publication Number Publication Date
EP4159886A1 EP4159886A1 (en) 2023-04-05
EP4159886A4 true EP4159886A4 (en) 2024-04-17

Family

ID=78722981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21813825.3A Pending EP4159886A4 (en) 2020-05-27 2021-05-25 Ultrahigh-strength dual-phase steel and manufacturing method therefor

Country Status (6)

Country Link
US (1) US20230227930A1 (en)
EP (1) EP4159886A4 (en)
JP (1) JP2023527389A (en)
CN (1) CN113737087B (en)
CA (1) CA3180467A1 (en)
WO (1) WO2021238916A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115216708B (en) * 2022-06-17 2023-08-22 攀钢集团攀枝花钢铁研究院有限公司 Low-cost high-yield-ratio 1200MPa grade cold-rolled dual-phase steel and preparation method thereof
CN117305683A (en) * 2022-06-22 2023-12-29 宝山钢铁股份有限公司 Cold-rolled steel plate with grade of 1300MPa or more 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
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
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
CN117089761B (en) * 2023-05-30 2024-06-04 宝山钢铁股份有限公司 Variable-strength dual-phase steel plate with normalized components and flexible manufacturing method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1940108A (en) * 2005-09-29 2007-04-04 宝山钢铁股份有限公司 Superhigh-strength cold rolling band steel with anti-tensile strength above 880Mpa and its production
EP2589674A1 (en) * 2010-06-30 2013-05-08 JFE Steel Corporation Ultrahigh-strength cold-rolled steel sheet with excellent ductility and delayed-fracture resistance, and process for producing same
JP2015113475A (en) * 2013-12-09 2015-06-22 Ｊｆｅスチール株式会社 High strength cold-rolled steel sheet and method for manufacturing the same
CN109280857A (en) * 2018-09-25 2019-01-29 邯郸钢铁集团有限责任公司 A kind of 1200MPa grades of ultrafast cold cold-rolled biphase steel plate and preparation method thereof
WO2020045220A1 (en) * 2018-08-31 2020-03-05 Ｊｆｅスチール株式会社 High-strength steel plate and method for producing same
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
EP3653745A1 (en) * 2017-10-20 2020-05-20 JFE Steel Corporation High-strength steel sheet and manufacturing method thereof

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11270531A (en) * 1998-03-19 1999-10-05 Nippon Steel Corp High strength bolt having good delayed fracture characteristic and manufacture thereof
CN100392135C (en) * 2005-06-30 2008-06-04 宝山钢铁股份有限公司 Ultra-high strength strip steel and its production process
CN101331019A (en) * 2005-10-24 2008-12-24 埃克森美孚上游研究公司 High strength dual phase steel with low yield ratio, high toughness and superior weldability
TWI524953B (en) * 2012-01-13 2016-03-11 新日鐵住金股份有限公司 Cold-rolled steel and process for production of cold-rolled steel
JP6052473B1 (en) * 2015-01-28 2016-12-27 Ｊｆｅスチール株式会社 High-strength cold-rolled steel sheet, high-strength plated steel sheet, and production methods thereof
WO2018220412A1 (en) * 2017-06-01 2018-12-06 Arcelormittal Method for producing high-strength steel parts with improved ductility, and parts obtained by said method
CN109207867A (en) * 2017-06-29 2019-01-15 宝山钢铁股份有限公司 A kind of cold rolled annealed dual phase steel, steel plate and its manufacturing method
CN108486494B (en) 2018-06-05 2019-06-21 西北工业大学 The production method of vanadium micro-alloying 1300MPa grade high-strength hot rolled steel plate and cold-rolled biphase steel plate
CN109504930B (en) 2018-12-20 2020-10-02 唐山钢铁集团有限责任公司 Hot-dip galvanized steel sheet with tensile strength of more than 1300MPa and production method thereof
CN109628846B (en) 2018-12-20 2020-08-04 唐山钢铁集团有限责任公司 1300 MPa-grade ultrahigh-strength cold-rolled steel plate for automobiles and production method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1940108A (en) * 2005-09-29 2007-04-04 宝山钢铁股份有限公司 Superhigh-strength cold rolling band steel with anti-tensile strength above 880Mpa and its production
EP2589674A1 (en) * 2010-06-30 2013-05-08 JFE Steel Corporation Ultrahigh-strength cold-rolled steel sheet with excellent ductility and delayed-fracture resistance, and process for producing same
JP2015113475A (en) * 2013-12-09 2015-06-22 Ｊｆｅスチール株式会社 High strength cold-rolled steel sheet and method for manufacturing the same
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
EP3653745A1 (en) * 2017-10-20 2020-05-20 JFE Steel Corporation High-strength steel sheet and manufacturing method thereof
WO2020045220A1 (en) * 2018-08-31 2020-03-05 Ｊｆｅスチール株式会社 High-strength steel plate and method for producing same
CN109280857A (en) * 2018-09-25 2019-01-29 邯郸钢铁集团有限责任公司 A kind of 1200MPa grades of ultrafast cold cold-rolled biphase steel plate and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2021238916A1 *

Also Published As

Publication number Publication date
CN113737087A (en) 2021-12-03
CA3180467A1 (en) 2021-12-02
JP2023527389A (en) 2023-06-28
CN113737087B (en) 2022-07-19
EP4159886A1 (en) 2023-04-05
WO2021238916A1 (en) 2021-12-02
US20230227930A1 (en) 2023-07-20

Similar Documents

Publication Publication Date Title
EP4159886A4 (en) Ultrahigh-strength dual-phase steel and manufacturing method therefor
EP4089198A4 (en) Yield-ratio-controlled steel and manufacturing method therefor
EP4006190A4 (en) High-strength steel sheet and method for manufacturing same
EP3885462A4 (en) High-yield-ratio cold-rolled dual-phase steel and manufacturing method therefor
EP3967779A4 (en) Steel sheet and method for manufacturing same
EP4043595A4 (en) Cold-rolled steel sheet and method for producing same
EP4159885A4 (en) 780 mpa-class cold-rolled and annealed dual-phase steel and manufacturing method therefor
EP4043596A4 (en) Steel sheet and method for manufacturing same
EP3848477A4 (en) High-carbon cold-rolled steel sheet and production method therefor, and mechanical parts made of high-carbon steel
EP4012055A4 (en) High-strength thin steel sheet and method for manufacturing same
EP4223894A4 (en) Steel sheet and method for producing same
EP3901303A4 (en) High-carbon hot-rolled steel sheet and method for manufacturing same
EP4095272A4 (en) Steel sheet and method for producing same
EP3889283A4 (en) High-strength steel sheet and method for manufacturing same
EP3929315A4 (en) Hot-rolled steel sheet and method for manufacturing same
EP3910083A4 (en) Steel sheet and method for manufacturing same
EP3647455A4 (en) Cold-rolled annealed dual-phase steel, steel plate, and manufacturing method therefor
EP3926057A4 (en) High-mn steel and method for manufacturing same
EP4183892A4 (en) Steel sheet and method for producing same
EP3954790A4 (en) Steel sheet and method for manufacturing same
EP3936629A4 (en) Hot-rolled steel sheet and production method therefor
EP4186987A4 (en) Steel sheet and method for manufacturing same
EP3933054A4 (en) High-strength steel sheet and method for manufacturing same
EP4089192A4 (en) Steel sheet and method for manufacturing same
EP4151762A4 (en) Steel sheet, member, and method for manufacturing same

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20221208

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Free format text: PREVIOUS MAIN CLASS: C22C0038020000

Ipc: C22C0038040000

A4 Supplementary search report drawn up and despatched

Effective date: 20240319

RIC1 Information provided on ipc code assigned before grant

Ipc: C21D 1/26 20060101ALI20240313BHEP

Ipc: C21D 1/25 20060101ALI20240313BHEP

Ipc: C21D 1/18 20060101ALI20240313BHEP

Ipc: C21D 6/00 20060101ALI20240313BHEP

Ipc: C21D 8/02 20060101ALI20240313BHEP

Ipc: C21D 9/46 20060101ALI20240313BHEP

Ipc: C21D 8/00 20060101ALI20240313BHEP

Ipc: C22C 38/00 20060101ALI20240313BHEP

Ipc: C22C 38/06 20060101ALI20240313BHEP

Ipc: C22C 38/14 20060101ALI20240313BHEP

Ipc: C22C 38/12 20060101ALI20240313BHEP

Ipc: C22C 38/02 20060101ALI20240313BHEP

Ipc: C22C 38/04 20060101AFI20240313BHEP