WO2008108333A1 - 厚手高強度鋼板およびその製造方法 - Google Patents

厚手高強度鋼板およびその製造方法 Download PDF

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Publication number
WO2008108333A1
WO2008108333A1 PCT/JP2008/053766 JP2008053766W WO2008108333A1 WO 2008108333 A1 WO2008108333 A1 WO 2008108333A1 JP 2008053766 W JP2008053766 W JP 2008053766W WO 2008108333 A1 WO2008108333 A1 WO 2008108333A1
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WIPO (PCT)
Prior art keywords
circle diameter
equivalent circle
isotropic
steel plate
less
Prior art date
Application number
PCT/JP2008/053766
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English (en)
French (fr)
Inventor
Hiroyuki Shirahata
Masaaki Fujioka
Akihiko Kojima
Yoichi Tanaka
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Nippon Steel Corporation
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Filing date
Publication date
Application filed by Nippon Steel Corporation filed Critical Nippon Steel Corporation
Priority to EP08721186.8A priority Critical patent/EP2119803A4/en
Priority to BRPI0808347-9A priority patent/BRPI0808347B1/pt
Priority to KR1020097019101A priority patent/KR101024709B1/ko
Priority to CN2008800070134A priority patent/CN101622370B/zh
Publication of WO2008108333A1 publication Critical patent/WO2008108333A1/ja

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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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/001—Heat treatment of ferrous alloys containing Ni
    • 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
    • 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
    • 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
    • C22C38/002—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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • 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
    • C21D2201/00—Treatment for obtaining particular effects
    • C21D2201/05—Grain orientation
    • 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
    • C21D2211/009—Pearlite

Abstract

　Ｎｉ含有鋼よりなり、ベイナイト主体組織かつパーライト分率5％以下であり、表裏面板厚5％表層域での円相当径25μｍ超の粗大フェライト分率が10％以下で、セメンタイトの平均円相当径が0.5μｍ以下であり、板圧延方向に垂直な断面内の、前記表層域を除く内部領域を、等方位領域毎に区分し、切断法の測定線を板厚に平行なＴ方向に引き、測定線上で、円相当径が8μｍ未満の等方位領域を除いて、連続して隣り合う複数の等方位領域の＜001＞軸のＴ方向に最も近い＜001＞軸同士が相互に成す角度が２０゜未満の、該等方位領域は一つの等き裂伝播抵抗領域とみなすとき、該等き裂伝播抵抗領域の平均円相当径が、ｄ＝（7.11×［Ｎｉ］＋11）×（1.2－ｔ／300）（μｍ）以下であることを特徴とする厚手高強度鋼板。
PCT/JP2008/053766 2007-03-05 2008-03-03 厚手高強度鋼板およびその製造方法 WO2008108333A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP08721186.8A EP2119803A4 (en) 2007-03-05 2008-03-03 THICKNESS HIGH-RESISTANT STEEL PLATE AND MANUFACTURING METHOD THEREFOR
BRPI0808347-9A BRPI0808347B1 (pt) 2007-03-05 2008-03-03 High resistance steel sheet and production method of the same
KR1020097019101A KR101024709B1 (ko) 2007-03-05 2008-03-03 두꺼운 고강도 강판 및 그 제조 방법
CN2008800070134A CN101622370B (zh) 2007-03-05 2008-03-03 厚壁高强度钢板及其制造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007054279 2007-03-05
JP2007-054279 2007-03-05

Publications (1)

Publication Number Publication Date
WO2008108333A1 true WO2008108333A1 (ja) 2008-09-12

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PCT/JP2008/053766 WO2008108333A1 (ja) 2007-03-05 2008-03-03 厚手高強度鋼板およびその製造方法

Country Status (7)

Country Link
EP (1) EP2119803A4 (ja)
JP (1) JP4309946B2 (ja)
KR (1) KR101024709B1 (ja)
CN (1) CN101622370B (ja)
BR (1) BRPI0808347B1 (ja)
TW (1) TWI335355B (ja)
WO (1) WO2008108333A1 (ja)

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CN101701326B (zh) * 2009-10-28 2011-07-20 南京钢铁股份有限公司 一种厚规格高强高韧船板钢及其生产方法
CN102691006A (zh) * 2011-03-23 2012-09-26 宝山钢铁股份有限公司 抗高回火参数sr脆化的低温镍钢及其制造方法
JP2017150067A (ja) * 2016-02-25 2017-08-31 新日鐵住金株式会社 脆性き裂伝播停止特性に優れた鋼板およびその製造方法

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WO2010082676A1 (ja) * 2009-01-14 2010-07-22 新日本製鐵株式会社 耐脆性き裂伝播性に優れた溶接構造体
EP2390047B1 (en) * 2009-01-14 2013-10-02 Nippon Steel & Sumitomo Metal Corporation Weld structure having brittle fracture arresting characteristics
JP5470904B2 (ja) * 2009-02-25 2014-04-16 Ｊｆｅスチール株式会社 ＴＳが５７０ＭＰａ以上、全伸びが２５％以上、ΔＫ＝１５ＭＰａ√ｍでの疲労き裂伝播速度８．７５ｘ１０−９ｍ／ｃｙｃｌｅ以下の、全伸びと疲労き裂伝播抵抗性に優れた板厚２０ｍｍ以下の厚鋼板の製造方法
KR101176612B1 (ko) 2009-06-11 2012-08-23 신닛뽄세이테쯔 카부시키카이샤 대입열 용접 열 영향부 인성이 우수한 고강도 후강판의 제조 방법 및 대입열 용접 열 영향부 인성이 우수한 고강도 후강판
JP4824143B2 (ja) * 2009-10-08 2011-11-30 新日本製鐵株式会社 高強度鋼管、高強度鋼管用鋼板、及び、それらの製造方法
JP5423309B2 (ja) * 2009-10-21 2014-02-19 新日鐵住金株式会社 海洋構造物用厚鋼板およびその製造方法
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BRPI0808347B1 (pt) 2017-07-04
KR20090110384A (ko) 2009-10-21
EP2119803A4 (en) 2016-07-20
TWI335355B (en) 2011-01-01
BRPI0808347A2 (pt) 2014-07-29
JP2008248382A (ja) 2008-10-16
TW200844240A (en) 2008-11-16
CN101622370B (zh) 2011-07-13
CN101622370A (zh) 2010-01-06
EP2119803A1 (en) 2009-11-18
KR101024709B1 (ko) 2011-03-24

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