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TW200604351A - A high strength steel plate excellent in low sound anisotropy and excellent in weldability and a method for producing the same - Google Patents

A high strength steel plate excellent in low sound anisotropy and excellent in weldability and a method for producing the same

Info

Publication number
TW200604351A
TW200604351A TW094105799A TW94105799A TW200604351A TW 200604351 A TW200604351 A TW 200604351A TW 094105799 A TW094105799 A TW 094105799A TW 94105799 A TW94105799 A TW 94105799A TW 200604351 A TW200604351 A TW 200604351A
Authority
TW
Taiwan
Prior art keywords
steel
cooling
less
temperature
weldability
Prior art date
Application number
TW094105799A
Other languages
Chinese (zh)
Other versions
TWI298353B (en
Inventor
Tatsuya Kumagai
Masaaki Fujioka
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Publication of TW200604351A publication Critical patent/TW200604351A/en
Application granted granted Critical
Publication of TWI298353B publication Critical patent/TWI298353B/en

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • 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
    • C21D8/0247—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
    • C22C38/001—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
    • C22C38/04—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
    • C21D2211/002—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
    • C21D2211/004—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

Landscapes

  • 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 Steel (AREA)
  • Metal Rolling (AREA)

Abstract

The present invention provides a high strength steel plate excellent in low sound anisotropy and excellent in weldability having tensile strength more than 570 MPa and a method for producing this plate by process of adapting accelerated cooling in combination with its suspension during cooling. The plate has a microstructure composed of more than 30 vol% of bainite and less than 5 vol% of the total of pearlite and martensite island and satisfying the expressions; 0.045% < Nb + 2Ti <<0.105%, A = (Nb + 2Ti) x (C+N x 12/14) ranges between 0.0025 and 0.0055. The production process of this plate comprises the steps of; heating a steel at or above 1200DEG C, rolling at or above 1020DEG C, rolling the steel at a temperature over 920DEG C and less than 1020DEG C with a cumulative reduction rate of less than 15%, and further continuing hot rolling the steel at a temperature between 860DEG C and 920DEG C with a cumulative reduction rate of 20- 50%, and then starting the accelerated cooling from a temperature more than 800DEG C with a cooling rate of 2- 30DEG C/sec, suspending the accelerated cooling at a temperature between 600DEG C and 700DEG C, and further cooling the steel with a cooling rate of less than 0.4DEG C/sec.
TW094105799A 2004-07-27 2005-02-25 A high strength steel plate excellent in low sound anisotropy and excellent in weldability and a method for producing the same TWI298353B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004218492A JP4317499B2 (en) 2003-10-03 2004-07-27 High tensile strength steel sheet having a low acoustic anisotropy and excellent weldability and having a tensile strength of 570 MPa or higher, and a method for producing the same

Publications (2)

Publication Number Publication Date
TW200604351A true TW200604351A (en) 2006-02-01
TWI298353B TWI298353B (en) 2008-07-01

Family

ID=35786014

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094105799A TWI298353B (en) 2004-07-27 2005-02-25 A high strength steel plate excellent in low sound anisotropy and excellent in weldability and a method for producing the same

Country Status (6)

Country Link
US (1) US20080295920A1 (en)
JP (1) JP4317499B2 (en)
KR (1) KR100868571B1 (en)
CN (1) CN1989266B (en)
TW (1) TWI298353B (en)
WO (1) WO2006011257A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4226626B2 (en) * 2005-11-09 2009-02-18 新日本製鐵株式会社 High tensile strength steel sheet with low acoustic anisotropy and excellent weldability, including yield stress of 450 MPa or more and tensile strength of 570 MPa or more, including the central part of the plate thickness, and method for producing the same
RU2393262C1 (en) * 2006-03-16 2010-06-27 Сумитомо Метал Индастриз, Лтд. Steel sheet for hidden arc welding
JP4934505B2 (en) * 2007-05-29 2012-05-16 株式会社神戸製鋼所 Steel sheet with excellent fatigue crack growth suppression characteristics and brittle fracture suppression characteristics
JP5096087B2 (en) * 2007-09-11 2012-12-12 株式会社神戸製鋼所 High tensile strength steel plate for high heat input welding with excellent base metal low temperature toughness
JP5217413B2 (en) * 2007-12-21 2013-06-19 Ｊｆｅスチール株式会社 High strength steel plate with excellent weld heat affected zone toughness and method for producing the same
JP5347827B2 (en) * 2009-08-17 2013-11-20 新日鐵住金株式会社 High yield point 490 MPa class welded structural steel excellent in acoustic anisotropy and method for producing the same
CN102409221B (en) * 2011-12-02 2012-12-19 武汉钢铁(集团)公司 Method for controlling edge cracks of peritectic steel containing niobium or boron
CN104451444B (en) * 2014-11-27 2017-02-22 宝山钢铁股份有限公司 Low-carbon-equivalent large heat input welding thick steel plate with and preparation method thereof
KR101758484B1 (en) * 2015-12-15 2017-07-17 주식회사 포스코 High strength steel sheet having excellent strain aging impact property and impact property in heat-affected zone and method for manufacturing the same
WO2018181564A1 (en) * 2017-03-30 2018-10-04 Ｊｆｅスチール株式会社 High strength steel sheet for sour-resistant line pipe, method for manufacturing same, and high strength steel pipe using high strength steel sheet for sour-resistant line pipe
EP3617336A4 (en) * 2017-04-28 2020-09-16 Nippon Steel Corporation HIGH STRENGTH STEEL SHEET AND METHOD OF MANUFACTURING ITEM
KR102507276B1 (en) * 2018-09-12 2023-03-07 제이에프이 스틸 가부시키가이샤 Steel and its manufacturing method
WO2025022586A1 (en) * 2023-07-25 2025-01-30 Ｊｆｅスチール株式会社 Steel sheet and method for manufacturing same
WO2025022587A1 (en) * 2023-07-25 2025-01-30 Ｊｆｅスチール株式会社 Steel sheet and method for manufacturing same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01301819A (en) * 1988-05-30 1989-12-06 Nippon Steel Corp Manufacturing method of low yield ratio non-tempered steel with little acoustic anisotropy
JP4294854B2 (en) * 1997-07-28 2009-07-15 エクソンモービル アップストリーム リサーチ カンパニー Ultra-high strength, weldable steel with excellent ultra-low temperature toughness
JP3718348B2 (en) * 1998-07-31 2005-11-24 新日本製鐵株式会社 High-strength and high-toughness rolled section steel and its manufacturing method
JP3737300B2 (en) * 1999-02-01 2006-01-18 株式会社神戸製鋼所 Non-tempered low yield ratio high tensile strength steel plate with excellent weldability
JP2000256737A (en) * 1999-03-05 2000-09-19 Nkk Corp Manufacturing method of high yield strength steel with low yield ratio
CN1078254C (en) * 1999-06-16 2002-01-23 冶金工业部钢铁研究总院 Controlled rolling technology for microally steel with superfine structure
US6364968B1 (en) * 2000-06-02 2002-04-02 Kawasaki Steel Corporation High-strength hot-rolled steel sheet having excellent stretch flangeability, and method of producing the same
JP3734692B2 (en) * 2000-08-01 2006-01-11 株式会社神戸製鋼所 Non-refining type low yield ratio high tensile strength steel sheet with low acoustic anisotropy and excellent weldability
JP3863413B2 (en) * 2001-11-22 2006-12-27 株式会社神戸製鋼所 High toughness high tension non-tempered thick steel plate and manufacturing method thereof

Also Published As

Publication number Publication date
JP4317499B2 (en) 2009-08-19
KR100868571B1 (en) 2008-11-13
KR20070027733A (en) 2007-03-09
JP2005126819A (en) 2005-05-19
CN1989266B (en) 2013-09-18
TWI298353B (en) 2008-07-01
CN1989266A (en) 2007-06-27
US20080295920A1 (en) 2008-12-04
WO2006011257A1 (en) 2006-02-02

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Legal Events

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MM4A Annulment or lapse of patent due to non-payment of fees