CA2693787A1 - Method for producing low yield strength cold rolled steel sheet excellent in uniformity - Google Patents

Method for producing low yield strength cold rolled steel sheet excellent in uniformity Download PDF

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Publication number
CA2693787A1
CA2693787A1 CA2693787A CA2693787A CA2693787A1 CA 2693787 A1 CA2693787 A1 CA 2693787A1 CA 2693787 A CA2693787 A CA 2693787A CA 2693787 A CA2693787 A CA 2693787A CA 2693787 A1 CA2693787 A1 CA 2693787A1
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CA
Canada
Prior art keywords
less
steel sheet
rolled steel
strength cold
producing
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.)
Granted
Application number
CA2693787A
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French (fr)
Other versions
CA2693787C (en
Inventor
Yoshihiko Ono
Hideyuki Kimura
Kaneharu Okuda
Takeshi Fujita
Michitaka Sakurai
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JFE Steel Corp
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Individual
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Publication of CA2693787A1 publication Critical patent/CA2693787A1/en
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Publication of CA2693787C publication Critical patent/CA2693787C/en
Expired - Fee Related legal-status Critical Current
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    • 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
    • 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
    • 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
    • C21D1/185—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
    • C21D1/26—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
    • 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
    • C21D8/0247—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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing 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
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
    • 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
    • C22C38/02—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
    • C22C38/38—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
    • C21D2211/004—Dispersions; Precipitations

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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)

Abstract

The present invention provides a method for producing a high-strength cold-rolled steel sheet with low YP and excellent uniformity. A method for producing a high-strength cold-rolled steel sheet includes hot-rolling and cold-rolling steel having a composition which contains, by %
by mass, over 0.01% to less than 0.08% of C, 0.2% or less of Si, 0.8% to less than 1.7% of Mn, 0.03% or less of P, 0.02%
or less of S, 0.3% or less of sol. Al, 0.01% or less of N, and over 0.4% to 2% of Cr, and which satisfies 1.9 < [Mneq]
< 3 and 0.34 <= [%Cr]/[%Mn], the balance being composed of iron and inevitable impurities; heating at an average heating rate of less than 3 °C/sec in a temperature range of 680°C to 740°C; annealing at an annealing temperature of over 740°C to less than 820°C; cooling at an average cooling rate of 2 to 30 °C/sec in a temperature range of the annealing temperature to 650°C; cooling at an average cooling rate of 10 °C/sec or more in the temperature range of 650°C to Tc°C represented by equation (1) below; and cooling at an average cooling rate of 0.2 to 10 °C/sec in the temperature range of Tc°C to 200°C. Tc = 410 - 40 x [%Mn] - 30 x [%Cr] ... (1) wherein [Mneq] represents the Mn equivalent shown by [Mneq] =[%Mn] + 1.3 x[%Cr] and [%Mn]
and [%Cr] represent the contents of Mn and Cr, respectively.

Claims (6)

  2. 2. The method for producing the high-strength cold-rolled steel sheet according to Claim 1, wherein during annealing, heating is performed at an average heating rate of less than 2°C/sec in a temperature range of 680°C to 740°C.
  3. 3. The method for producing the high-strength cold-rolled steel sheet according to Claim 1 or 2, wherein steel satisfying 0.55 <= [%Cr]/[%Mn] is used.
  4. 4. The method for producing the high-strength cold-rolled steel sheet according to any one of Claims 1 to 3, wherein steel further containing, by % by mass, 0.005% or less of B
    is used.
  5. 5. The method for producing the high-strength cold-rolled steel sheet according to any one of Claims 1 to 4, wherein steel further containing, by % by mass, at least one of 0.1%
    or less of Mo and 0.2% or less of V is used.
  6. 6. The method for producing the high-strength cold-rolled steel sheet according to any one of Claims 1 to 5, wherein steel further containing, by % by mass, at least one of less than 0.014% of Ti, less than 0.01% of Nb, 0.3% or less of Ni, and 0.3% or less of Cu is used.
CA2693787A 2007-07-11 2008-07-10 Method for producing low yield strength cold rolled steel sheet excellent in uniformity Expired - Fee Related CA2693787C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007-181947 2007-07-11
JP2007181947 2007-07-11
PCT/JP2008/062873 WO2009008548A1 (en) 2007-07-11 2008-07-10 Process for producing high-strength cold rolled steel sheet with low yield strength and with less material quality fluctuation

Publications (2)

Publication Number Publication Date
CA2693787A1 true CA2693787A1 (en) 2009-01-15
CA2693787C CA2693787C (en) 2012-02-07

Family

ID=40228711

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2693787A Expired - Fee Related CA2693787C (en) 2007-07-11 2008-07-10 Method for producing low yield strength cold rolled steel sheet excellent in uniformity

Country Status (7)

Country Link
US (1) US20100326572A1 (en)
EP (1) EP2169083B1 (en)
JP (1) JP5272548B2 (en)
KR (1) KR101164471B1 (en)
CN (1) CN101688265B (en)
CA (1) CA2693787C (en)
WO (1) WO2009008548A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4623233B2 (en) 2009-02-02 2011-02-02 Ｊｆｅスチール株式会社 High-strength hot-dip galvanized steel sheet and manufacturing method thereof
JP4811528B2 (en) 2009-07-28 2011-11-09 Ｊｆｅスチール株式会社 High-strength cold-rolled steel sheet and manufacturing method thereof
PL2500445T3 (en) * 2009-11-09 2020-08-10 Nippon Steel Corporation High-strength steel sheet having excellent processability and paint bake hardenability, and method for producing of high-strength steel sheet
JP5703632B2 (en) * 2010-08-31 2015-04-22 Ｊｆｅスチール株式会社 Warm press molding material and panel manufacturing method
CN102409252A (en) * 2010-09-21 2012-04-11 鞍钢股份有限公司 Ultrahigh-strength cold-rolled steel plate and manufacturing method thereof
CN102011056A (en) * 2010-09-30 2011-04-13 广州珠江钢铁有限责任公司 High-strength cold-rolled steel with yield strength of 550MPa level and preparation method thereof
CN103469089B (en) * 2013-09-11 2016-01-27 马鞍山市安工大工业技术研究院有限公司 A kind of cheese crystal grain deep-draw dual phase sheet steel and preparation method thereof
KR101795918B1 (en) 2015-07-24 2017-11-10 주식회사 포스코 Hot dip galvanized and galvannealed steel sheet having higher bake hardening and aging properties, and method for the same
WO2020121034A1 (en) * 2018-12-13 2020-06-18 Arcelormittal Steels for laser cutting
KR102326110B1 (en) * 2019-12-20 2021-11-16 주식회사 포스코 Cold rolled steel sheet and metal plated steel sheet having excellent bake hardenability and aging property at room temperature, and manufacturing method thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55122821A (en) 1979-03-15 1980-09-20 Kawasaki Steel Corp Manufacture of alloyed zinc-plated high tensile steel sheet with high workability
JPS5929089B2 (en) * 1979-07-31 1984-07-18 住友金属工業株式会社 Method for manufacturing high-strength cold-rolled steel sheet with good workability
JPH03277743A (en) * 1990-03-27 1991-12-09 Kawasaki Steel Corp Ultrahigh tensile strength cold rolled steel sheet and its manufacture
EP1669472B1 (en) * 1998-12-07 2008-02-27 JFE Steel Corporation High strength cold rolled steel sheet and method for manufacturing the same
KR100664433B1 (en) * 2000-04-07 2007-01-03 제이에프이 스틸 가부시키가이샤 Hot rolled steel plate, cold rolled steel plate and hot dip galvanized steel plate being excellent in strain aging hardening characteristics, and method for their production
US20070144633A1 (en) * 2004-03-31 2007-06-28 Taro Kizu High-stiffness high-strength thin steel sheet and method for producing the same
JP4639996B2 (en) * 2004-07-06 2011-02-23 住友金属工業株式会社 Manufacturing method of high-tensile cold-rolled steel sheet
JP4525383B2 (en) 2005-02-25 2010-08-18 Ｊｆｅスチール株式会社 Low yield ratio high strength steel sheet with excellent bake hardening characteristics and method for producing the same

Also Published As

Publication number Publication date
JP2009035816A (en) 2009-02-19
EP2169083A1 (en) 2010-03-31
KR101164471B1 (en) 2012-07-18
US20100326572A1 (en) 2010-12-30
CN101688265B (en) 2011-06-22
EP2169083A4 (en) 2015-05-20
JP5272548B2 (en) 2013-08-28
CA2693787C (en) 2012-02-07
KR20100027209A (en) 2010-03-10
EP2169083B1 (en) 2018-03-14
WO2009008548A1 (en) 2009-01-15
CN101688265A (en) 2010-03-31

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