CN104245988B - 冷轧钢板及其制造方法 - Google Patents

冷轧钢板及其制造方法 Download PDF

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Publication number
CN104245988B
CN104245988B CN201380021320.9A CN201380021320A CN104245988B CN 104245988 B CN104245988 B CN 104245988B CN 201380021320 A CN201380021320 A CN 201380021320A CN 104245988 B CN104245988 B CN 104245988B
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China
Prior art keywords
steel sheet
rolled steel
cold
temperature
cooling
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Expired - Fee Related
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CN201380021320.9A
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English (en)
Chinese (zh)
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CN104245988A (zh
Inventor
畑显吾
富田俊郎
今井规雄
芳贺纯
西尾拓也
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Nippon Steel Corp
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Nippon Steel Corp
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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
    • 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
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/12—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
    • 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
    • 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
    • C22C38/38—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
    • 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
    • C21D8/0278—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 involving a particular surface treatment 
    • C21D8/0284—Application of a separating or insulating coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]

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  • 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 Sheet Steel (AREA)
CN201380021320.9A 2012-02-22 2013-02-13 冷轧钢板及其制造方法 Expired - Fee Related CN104245988B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012036475 2012-02-22
JP2012-036475 2012-02-22
PCT/JP2013/053313 WO2013125400A1 (ja) 2012-02-22 2013-02-13 冷延鋼板およびその製造方法

Publications (2)

Publication Number Publication Date
CN104245988A CN104245988A (zh) 2014-12-24
CN104245988B true CN104245988B (zh) 2016-07-06

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CN201380021320.9A Expired - Fee Related CN104245988B (zh) 2012-02-22 2013-02-13 冷轧钢板及其制造方法

Country Status (12)

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US (2) US9580767B2 (enExample)
EP (1) EP2818569B1 (enExample)
JP (1) JP5590244B2 (enExample)
KR (1) KR101609969B1 (enExample)
CN (1) CN104245988B (enExample)
BR (1) BR112014020567B1 (enExample)
ES (1) ES2673111T3 (enExample)
IN (1) IN2014DN07404A (enExample)
MX (1) MX356409B (enExample)
PL (1) PL2818569T3 (enExample)
TW (1) TWI515305B (enExample)
WO (1) WO2013125400A1 (enExample)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105899699B (zh) 2014-01-06 2017-07-28 新日铁住金株式会社 钢材及其制造方法
IN201617022707A (enExample) 2014-01-06 2016-08-31 Nippon Steel & Sumitomo Metal Corp
JP6256184B2 (ja) * 2014-05-12 2018-01-10 Ｊｆｅスチール株式会社 高強度鋼板の製造方法
JP6379716B2 (ja) * 2014-06-23 2018-08-29 新日鐵住金株式会社 冷延鋼板及びその製造方法
CN107429369B (zh) * 2015-02-24 2019-04-05 新日铁住金株式会社 冷轧钢板及其制造方法
EP3246427B1 (en) * 2015-03-06 2018-12-12 JFE Steel Corporation High strength electric resistance welded steel pipe and manufacturing method therefor
SE539519C2 (en) * 2015-12-21 2017-10-03 High strength galvannealed steel sheet and method of producing such steel sheet
JP7094665B2 (ja) * 2017-06-13 2022-07-04 キヤノン株式会社 記録装置および記録制御方法
US11643700B2 (en) * 2018-03-30 2023-05-09 Jfe Steel Corporation High-strength steel sheet and production method thereof
US11661642B2 (en) * 2018-03-30 2023-05-30 Jfe Steel Corporation High-strength steel sheet and method for manufacturing same
EP3778974B1 (en) * 2018-03-30 2024-01-03 JFE Steel Corporation High-strength steel sheet and method for manufacturing same
CN108588565B (zh) * 2018-06-14 2021-01-05 北京工业大学 一种含铝高硼高速钢轧辊材料及其制造方法
US12180557B2 (en) * 2019-04-08 2024-12-31 Nippon Steel Corporation Cold rolled steel sheet and method for producing same
JP7588598B2 (ja) * 2019-11-15 2024-11-22 日本製鉄株式会社 ロータコア、ロータ、および回転電機
WO2021205943A1 (ja) * 2020-04-07 2021-10-14 日本製鉄株式会社 鋼板
WO2022019209A1 (ja) * 2020-07-20 2022-01-27 日本製鉄株式会社 鋼板及びその製造方法
EP4296396A4 (en) * 2021-03-31 2024-08-07 Nippon Steel Corporation Steel plate, method for producing steel plate, and method for producing intermediate steel plate
WO2024157551A1 (ja) * 2023-01-26 2024-08-02 Ｊｆｅスチール株式会社 鋼板および部材、ならびに、それらの製造方法
KR20250159192A (ko) * 2023-03-31 2025-11-10 제이에프이 스틸 가부시키가이샤 강판, 부재 및 그들의 제조 방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1450191A (zh) * 2002-03-22 2003-10-22 川崎制铁株式会社 延展性和延伸翻口性出色的高强度热轧钢板及其制造方法
CN1654695A (zh) * 2004-02-10 2005-08-17 鞍山钢铁集团公司 低碳高强度复合强化超细晶粒热轧线材及其生产工艺
JP2008291304A (ja) * 2007-05-24 2008-12-04 Jfe Steel Kk 深絞り性と強度−延性バランスに優れた高強度冷延鋼板および高強度溶融亜鉛めっき鋼板ならびにその製造方法
CN101460644A (zh) * 2006-06-01 2009-06-17 本田技研工业株式会社 高强度钢板及其制造方法
JP2011214081A (ja) * 2010-03-31 2011-10-27 Sumitomo Metal Ind Ltd 冷延鋼板およびその製造方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3749615B2 (ja) * 1998-03-31 2006-03-01 新日本製鐵株式会社 疲労特性に優れた加工用高強度冷延鋼板およびその製造方法
US6395108B2 (en) 1998-07-08 2002-05-28 Recherche Et Developpement Du Groupe Cockerill Sambre Flat product, such as sheet, made of steel having a high yield strength and exhibiting good ductility and process for manufacturing this product
JP2005325393A (ja) * 2004-05-13 2005-11-24 Jfe Steel Kk 高強度冷延鋼板およびその製造方法
CN102251087B (zh) 2005-08-03 2013-03-27 住友金属工业株式会社 热轧钢板及冷轧钢板及它们的制造方法
JP5320681B2 (ja) 2007-03-19 2013-10-23 Ｊｆｅスチール株式会社 高強度冷延鋼板及び高強度冷延鋼板の製造方法
JP4894863B2 (ja) * 2008-02-08 2012-03-14 Ｊｆｅスチール株式会社 加工性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法
JP5463685B2 (ja) 2009-02-25 2014-04-09 Ｊｆｅスチール株式会社 加工性および耐衝撃性に優れた高強度冷延鋼板およびその製造方法
JP4737319B2 (ja) * 2009-06-17 2011-07-27 Ｊｆｅスチール株式会社 加工性および耐疲労特性に優れた高強度合金化溶融亜鉛めっき鋼板およびその製造方法
CA2782777C (en) 2010-01-13 2014-11-18 Nippon Steel Corporation High tensile steel sheet superior in formability and method of manufacturing the same
JP5549238B2 (ja) 2010-01-22 2014-07-16 新日鐵住金株式会社 冷延鋼板およびその製造方法
EP2604715B1 (en) * 2010-08-12 2019-12-11 JFE Steel Corporation Method for manufacturing a high-strength cold-rolled steel sheet having excellent formability and crashworthiness

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1450191A (zh) * 2002-03-22 2003-10-22 川崎制铁株式会社 延展性和延伸翻口性出色的高强度热轧钢板及其制造方法
CN1654695A (zh) * 2004-02-10 2005-08-17 鞍山钢铁集团公司 低碳高强度复合强化超细晶粒热轧线材及其生产工艺
CN101460644A (zh) * 2006-06-01 2009-06-17 本田技研工业株式会社 高强度钢板及其制造方法
JP2008291304A (ja) * 2007-05-24 2008-12-04 Jfe Steel Kk 深絞り性と強度−延性バランスに優れた高強度冷延鋼板および高強度溶融亜鉛めっき鋼板ならびにその製造方法
JP2011214081A (ja) * 2010-03-31 2011-10-27 Sumitomo Metal Ind Ltd 冷延鋼板およびその製造方法

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Publication number Publication date
KR20140129209A (ko) 2014-11-06
US20170121788A1 (en) 2017-05-04
US10407749B2 (en) 2019-09-10
EP2818569B1 (en) 2018-05-02
MX356409B (es) 2018-05-24
JP5590244B2 (ja) 2014-09-17
KR101609969B1 (ko) 2016-04-06
US20150037610A1 (en) 2015-02-05
EP2818569A1 (en) 2014-12-31
ES2673111T3 (es) 2018-06-19
BR112014020567B1 (pt) 2019-03-26
PL2818569T3 (pl) 2018-09-28
TWI515305B (zh) 2016-01-01
MX2014009994A (es) 2015-02-20
IN2014DN07404A (enExample) 2015-04-24
JPWO2013125400A1 (ja) 2015-07-30
EP2818569A4 (en) 2015-12-30
TW201400626A (zh) 2014-01-01
WO2013125400A1 (ja) 2013-08-29
CN104245988A (zh) 2014-12-24
US9580767B2 (en) 2017-02-28

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Address after: Tokyo, Japan

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