KR100868571B1 - 음향 이방성이 작고 용접성이 우수한 고장력 강판 및 그제조 방법 - Google Patents
음향 이방성이 작고 용접성이 우수한 고장력 강판 및 그제조 방법 Download PDFInfo
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- KR100868571B1 KR100868571B1 KR1020077001678A KR20077001678A KR100868571B1 KR 100868571 B1 KR100868571 B1 KR 100868571B1 KR 1020077001678 A KR1020077001678 A KR 1020077001678A KR 20077001678 A KR20077001678 A KR 20077001678A KR 100868571 B1 KR100868571 B1 KR 100868571B1
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title abstract description 30
- 230000008569 process Effects 0.000 title abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 46
- 238000005096 rolling process Methods 0.000 claims abstract description 42
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 18
- 230000009467 reduction Effects 0.000 claims abstract description 14
- 230000001186 cumulative effect Effects 0.000 claims abstract description 13
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 6
- 229910001562 pearlite Inorganic materials 0.000 claims abstract description 6
- 229910052758 niobium Inorganic materials 0.000 claims description 29
- 229910052719 titanium Inorganic materials 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 7
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 3
- 238000005098 hot rolling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000001556 precipitation Methods 0.000 description 52
- 230000000052 comparative effect Effects 0.000 description 30
- 238000005728 strengthening Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 17
- 239000002244 precipitate Substances 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 14
- 238000010583 slow cooling Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 229910000859 α-Fe Inorganic materials 0.000 description 11
- 238000010791 quenching Methods 0.000 description 8
- 229910001566 austenite Inorganic materials 0.000 description 7
- 150000001247 metal acetylides Chemical class 0.000 description 7
- 230000000171 quenching effect Effects 0.000 description 7
- 238000005496 tempering Methods 0.000 description 7
- 239000010953 base metal Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 5
- 238000003303 reheating Methods 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 238000005275 alloying Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- 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
Description
Claims (3)
- 질량%로,C: 0.03% 이상, 0.07% 이하,Si: 0.2 내지 0.6%,Mn: 0.8 내지 2.0%,Al: 0.003% 이상, 0.1% 이하,Nb: 0.025 내지 0.1%,Ti: 0.005 내지 0.1%,[Nb]+2×[Ti]: 0.045 내지 0.105%,Mo: 0.05% 이상, 0.3% 이하,N: 0.0025% 초과, 0.008% 이하를 함유하고, 또한, Nb, Ti, C, N을 아래 (1)식의 A로 나타내는 값 A가, 0.0025 이상, 0.0055 이하가 되는 관계를 만족하는 범위에서 함유하고, 잔부 Fe 및 불가피한 불순물로 이루어지는 강 조성을 가지며, 또한 강 조직이 베이나이트의 체적율이 30% 이상, 펄라이트 및 섬 모양 마르텐사이트의 체적율의 합이 3% 미만인 것을 특징으로 하는 음향 이방성이 작고 용접성이 우수한 인장 강도 570 MPa 이상의 고장력 강판.A= ([Nb]+2×[Ti])×([C]+[N]×12/14)… (1) 식여기에서, [Nb], [Ti], [C], [N]은 각각 Nb, Ti, C, N의 질량%를 의미한다.
- 삭제
- 제1항에 기재된 성분 조성을 가지는 강편 또는 주편을, 1200℃ 이상, 1300℃ 이하로 가열하고, 1020℃ 이상의 온도 범위에서 조압연한 후, 1020℃ 미만, 920℃ 초과의 온도 범위에서의 누적 압하율 15% 이하, 920℃ 이하, 860℃ 이상의 온도 범위에서의 누적 압하율 20% 이상으로 하는 열간 압연 후, 2℃/sec 이상, 30℃/sec 이하의 냉각 속도로 가속 냉각을 800℃ 이상의 온도로부터 개시하여, 판 두께 중심부 온도가 700℃ 이하, 600℃ 이상에서 상기 가속 냉각을 정지하고, 그 후, 0.4℃/sec 이하의 냉각 속도로 냉각하는 것을 특징으로 하는 음향 이방성이 작고 용접성이 우수한 인장 강도 570 MPa 이상의 고장력 강판.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP-P-2004-00218492 | 2004-07-27 | ||
JP2004218492A JP4317499B2 (ja) | 2003-10-03 | 2004-07-27 | 音響異方性が小さく溶接性に優れる引張強さ570MPa級以上の高張力鋼板およびその製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20070027733A KR20070027733A (ko) | 2007-03-09 |
KR100868571B1 true KR100868571B1 (ko) | 2008-11-13 |
Family
ID=35786014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020077001678A KR100868571B1 (ko) | 2004-07-27 | 2005-02-14 | 음향 이방성이 작고 용접성이 우수한 고장력 강판 및 그제조 방법 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080295920A1 (ko) |
JP (1) | JP4317499B2 (ko) |
KR (1) | KR100868571B1 (ko) |
CN (1) | CN1989266B (ko) |
TW (1) | TWI298353B (ko) |
WO (1) | WO2006011257A1 (ko) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4226626B2 (ja) * | 2005-11-09 | 2009-02-18 | 新日本製鐵株式会社 | 音響異方性が小さく溶接性に優れる、板厚中心部も含めて降伏応力450MPa以上かつ引張強さ570MPa以上の高張力鋼板およびその製造方法 |
JP5137032B2 (ja) * | 2006-03-16 | 2013-02-06 | 新日鐵住金株式会社 | サブマージアーク溶接用鋼板 |
JP4934505B2 (ja) * | 2007-05-29 | 2012-05-16 | 株式会社神戸製鋼所 | 疲労亀裂進展抑制特性および脆性破壊抑制特性に優れた鋼板 |
JP5096087B2 (ja) * | 2007-09-11 | 2012-12-12 | 株式会社神戸製鋼所 | 母材低温靭性に優れた大入熱溶接用高張力鋼板 |
JP5217413B2 (ja) * | 2007-12-21 | 2013-06-19 | Jfeスチール株式会社 | 溶接熱影響部靭性に優れた高強度鋼板及びその製造方法 |
JP5347827B2 (ja) * | 2009-08-17 | 2013-11-20 | 新日鐵住金株式会社 | 音響異方性に優れた高降伏点490MPa級溶接構造用鋼およびその製造方法 |
CN102409221B (zh) * | 2011-12-02 | 2012-12-19 | 武汉钢铁(集团)公司 | 一种控制含铌或硼包晶钢边裂的方法 |
CN104451444B (zh) * | 2014-11-27 | 2017-02-22 | 宝山钢铁股份有限公司 | 一种低碳当量可大线能量焊接用厚钢板及其制造方法 |
KR101758484B1 (ko) * | 2015-12-15 | 2017-07-17 | 주식회사 포스코 | 저온 변형시효 충격특성 및 용접 열영향부 충격특성이 우수한 고강도 강재 및 이의 제조방법 |
CN110475894B (zh) * | 2017-03-30 | 2022-03-22 | 杰富意钢铁株式会社 | 耐酸性管线管用高强度钢板及其制造方法和使用耐酸性管线管用高强度钢板的高强度钢管 |
US20200071801A1 (en) * | 2017-04-28 | 2020-03-05 | Nippon Steel Corporation | High strength steel sheet and method of producing same |
JP6750748B1 (ja) * | 2018-09-12 | 2020-09-02 | Jfeスチール株式会社 | 鋼材およびその製造方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002053912A (ja) * | 2000-08-01 | 2002-02-19 | Kobe Steel Ltd | 音響異方性が小さく溶接性に優れた非調質型低降伏比高張力鋼板の製造方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH01301819A (ja) * | 1988-05-30 | 1989-12-06 | Nippon Steel Corp | 音響異方性の少ない低降伏比非調質鋼の製造方法 |
ES2264572T3 (es) * | 1997-07-28 | 2007-01-01 | Exxonmobil Upstream Research Company | Aceros soldables ultrarresistentes con una tenacidad excelente a temperaturas ultrabajas. |
JP3718348B2 (ja) * | 1998-07-31 | 2005-11-24 | 新日本製鐵株式会社 | 高強度高靱性圧延形鋼とその製造方法 |
JP3737300B2 (ja) * | 1999-02-01 | 2006-01-18 | 株式会社神戸製鋼所 | 溶接性の優れた非調質型低降伏比高張力鋼板 |
JP2000256737A (ja) * | 1999-03-05 | 2000-09-19 | Nkk Corp | 低降伏比高張力厚鋼材の製造方法 |
CN1078254C (zh) * | 1999-06-16 | 2002-01-23 | 冶金工业部钢铁研究总院 | 一种超细组织微合金钢控制轧制方法 |
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 |
JP3863413B2 (ja) * | 2001-11-22 | 2006-12-27 | 株式会社神戸製鋼所 | 高靭性高張力非調質厚鋼板およびその製造方法 |
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2004
- 2004-07-27 JP JP2004218492A patent/JP4317499B2/ja active Active
-
2005
- 2005-02-14 US US11/658,334 patent/US20080295920A1/en not_active Abandoned
- 2005-02-14 CN CN2005800251441A patent/CN1989266B/zh not_active Expired - Fee Related
- 2005-02-14 KR KR1020077001678A patent/KR100868571B1/ko active IP Right Grant
- 2005-02-14 WO PCT/JP2005/002663 patent/WO2006011257A1/ja active Application Filing
- 2005-02-25 TW TW094105799A patent/TWI298353B/zh not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002053912A (ja) * | 2000-08-01 | 2002-02-19 | Kobe Steel Ltd | 音響異方性が小さく溶接性に優れた非調質型低降伏比高張力鋼板の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP4317499B2 (ja) | 2009-08-19 |
TWI298353B (en) | 2008-07-01 |
JP2005126819A (ja) | 2005-05-19 |
TW200604351A (en) | 2006-02-01 |
CN1989266B (zh) | 2013-09-18 |
KR20070027733A (ko) | 2007-03-09 |
WO2006011257A1 (ja) | 2006-02-02 |
CN1989266A (zh) | 2007-06-27 |
US20080295920A1 (en) | 2008-12-04 |
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