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EP4324954A3 - High-hardness steel sheet, and manufacturing method thereof - Google Patents

High-hardness steel sheet, and manufacturing method thereof Download PDF

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Publication number
EP4324954A3
EP4324954A3 EP24150998.3A EP24150998A EP4324954A3 EP 4324954 A3 EP4324954 A3 EP 4324954A3 EP 24150998 A EP24150998 A EP 24150998A EP 4324954 A3 EP4324954 A3 EP 4324954A3
Authority
EP
European Patent Office
Prior art keywords
steel sheet
hardness
manufacturing
content
hardness 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
EP24150998.3A
Other languages
German (de)
French (fr)
Other versions
EP4324954A2 (en
Inventor
Young-Roc Im
Jun-Sang JANG
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 EP4324954A2 publication Critical patent/EP4324954A2/en
Publication of EP4324954A3 publication Critical patent/EP4324954A3/en
Pending legal-status Critical Current

Links

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
    • C21D8/0226—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
    • 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
    • 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
    • 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
    • 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
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C21D2211/002—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)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

The objective of one aspect of the present invention is to provide a high-hardness steel sheet and a manufacturing method, the high-hardness steel sheet having Brinell hardness of 500 HB or more by setting a steel composition according to a minimum carbon content relation (1). Another aspect of the present invention relates to, as a high-hardness steel sheet having Brinell hardness of 500 HB or more and to be manufactured by comprising a process of cooling a hot rolled steel sheet, a high-hardness steel sheet having a minimum carbon (C) content which meets the following relation (1), having a microstructure comprising 95 vol% or more of martensite phase, and having Brinell hardness of 500 HB or more; and a manufacturing method therefor. C minimum carbon c content ≥ 0.481 − 0.104 Mn − 0.035 Si − 0.088 Cr − 0.054 Ni − 0.035 Mo − 0.0003 C .R . (wherein Mn, Si, Cr, Ni and Mo are a value representing the content of each element by wt%, and C.R. is a value represent cooling rate during cooling a hot rolled steel sheet and the unit thereof is °C /sec)
EP24150998.3A 2015-08-21 2016-08-18 High-hardness steel sheet, and manufacturing method thereof Pending EP4324954A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020150117985A KR101696094B1 (en) 2015-08-21 2015-08-21 Steel sheet having superior hardness and method for manufacturing the same
PCT/KR2016/009079 WO2017034216A1 (en) 2015-08-21 2016-08-18 High-hardness steel sheet, and manufacturing method therefor
EP16839505.1A EP3339464B1 (en) 2015-08-21 2016-08-18 Method for manufacturing a high-hardness steel sheet

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP16839505.1A Division EP3339464B1 (en) 2015-08-21 2016-08-18 Method for manufacturing a high-hardness steel sheet
EP16839505.1A Division-Into EP3339464B1 (en) 2015-08-21 2016-08-18 Method for manufacturing a high-hardness steel sheet

Publications (2)

Publication Number Publication Date
EP4324954A2 EP4324954A2 (en) 2024-02-21
EP4324954A3 true EP4324954A3 (en) 2024-05-22

Family

ID=57835400

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16839505.1A Active EP3339464B1 (en) 2015-08-21 2016-08-18 Method for manufacturing a high-hardness steel sheet
EP24150998.3A Pending EP4324954A3 (en) 2015-08-21 2016-08-18 High-hardness steel sheet, and manufacturing method thereof

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP16839505.1A Active EP3339464B1 (en) 2015-08-21 2016-08-18 Method for manufacturing a high-hardness steel sheet

Country Status (6)

Country Link
US (1) US20180237875A1 (en)
EP (2) EP3339464B1 (en)
JP (1) JP6843119B2 (en)
KR (1) KR101696094B1 (en)
CN (1) CN107923023B (en)
WO (1) WO2017034216A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102031443B1 (en) 2017-12-22 2019-11-08 주식회사 포스코 Wear resistant steel having excellent hardness and impact toughness and method of manufacturing the same
KR102031446B1 (en) * 2017-12-22 2019-11-08 주식회사 포스코 Wear resistant steel having excellent hardness and impact toughness and method of manufacturing the same
KR102045646B1 (en) * 2017-12-26 2019-11-15 주식회사 포스코 Abrasion resistance steel having excellent homogeneous material properties and method for manufacturing the same
KR102175570B1 (en) * 2018-09-27 2020-11-06 주식회사 포스코 Wear resistant steel having excellent hardness and impact toughness and method of manufacturing the same
JP7163887B2 (en) * 2019-08-21 2022-11-01 Ｊｆｅスチール株式会社 Wear-resistant steel with excellent fatigue resistance
JP7163889B2 (en) * 2019-08-21 2022-11-01 Ｊｆｅスチール株式会社 Manufacturing method for wear-resistant steel with excellent fatigue resistance
DE102019215055A1 (en) * 2019-09-30 2021-04-01 Thyssenkrupp Steel Europe Ag Process for manufacturing a steel product and a corresponding steel product
CN113215488B (en) * 2021-05-07 2022-06-17 马鞍山钢铁股份有限公司 Heat-treatment-free NM360 wear-resistant steel plate and manufacturing method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09263884A (en) * 1996-03-28 1997-10-07 Kobe Steel Ltd High strength hot rolled steel plate excellent in pitting corrosion resistance and crushing resistance, high strength galvanized steel plate, and their production
EP2692890A1 (en) * 2011-03-29 2014-02-05 JFE Steel Corporation Abrasion-resistant steel sheet exhibiting excellent resistance to stress corrosion cracking, and method for producing same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69823126T2 (en) * 1997-09-22 2004-08-26 National Research Institute For Metals Fine-grained ferritic steel and manufacturing process of this steel
JP3736320B2 (en) * 2000-09-11 2006-01-18 Ｊｆｅスチール株式会社 Abrasion-resistant steel with excellent toughness and delayed fracture resistance and method for producing the same
EP1741798A1 (en) * 2004-04-28 2007-01-10 JFE Steel Corporation Parts for machine construction and method for production thereof
JP4374350B2 (en) * 2006-04-11 2009-12-02 新日本製鐵株式会社 High-hardness hot-rolled steel sheet excellent in weldability, workability, and high-speed impact penetration performance and method for producing the same
CN102666897B (en) * 2009-11-17 2015-04-15 新日铁住金株式会社 High-toughness abrasion-resistant steel
KR101271888B1 (en) * 2010-12-23 2013-06-05 주식회사 포스코 Thick Plate Having Excellent Wear Resistant And Low-Temperature Toughness, And Method For Manufacturing The Same
CN102517509A (en) * 2012-01-06 2012-06-27 江苏省沙钢钢铁研究院有限公司 HB 500-grade wear-resistant steel plate and preparation method thereof
JP5966730B2 (en) * 2012-07-30 2016-08-10 Ｊｆｅスチール株式会社 Abrasion resistant steel plate with excellent impact wear resistance and method for producing the same
IN2015DN00771A (en) * 2012-09-19 2015-07-03 Jfe Steel Corp
CN103146997B (en) * 2013-03-28 2015-08-26 宝山钢铁股份有限公司 A kind of low-alloy high-flexibility wear-resistant steel plate and manufacture method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09263884A (en) * 1996-03-28 1997-10-07 Kobe Steel Ltd High strength hot rolled steel plate excellent in pitting corrosion resistance and crushing resistance, high strength galvanized steel plate, and their production
EP2692890A1 (en) * 2011-03-29 2014-02-05 JFE Steel Corporation Abrasion-resistant steel sheet exhibiting excellent resistance to stress corrosion cracking, and method for producing same

Also Published As

Publication number Publication date
KR101696094B1 (en) 2017-01-13
EP3339464C0 (en) 2024-07-03
US20180237875A1 (en) 2018-08-23
CN107923023A (en) 2018-04-17
JP6843119B2 (en) 2021-03-17
EP4324954A2 (en) 2024-02-21
WO2017034216A1 (en) 2017-03-02
EP3339464B1 (en) 2024-07-03
JP2018528325A (en) 2018-09-27
CN107923023B (en) 2020-04-24
EP3339464A4 (en) 2018-08-08
EP3339464A1 (en) 2018-06-27

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