JP2005126819A - 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 - Google Patents
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 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 57
- 239000010959 steel Substances 0.000 claims abstract description 57
- 238000001816 cooling Methods 0.000 claims abstract description 50
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 41
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 41
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 230000001186 cumulative effect Effects 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 9
- 229910001562 pearlite Inorganic materials 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims description 54
- 230000009467 reduction Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 24
- 238000001556 precipitation Methods 0.000 description 58
- 238000005728 strengthening Methods 0.000 description 32
- 230000000052 comparative effect Effects 0.000 description 28
- 230000000694 effects Effects 0.000 description 23
- 230000008569 process Effects 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 17
- 239000002244 precipitate Substances 0.000 description 15
- 238000005496 tempering Methods 0.000 description 12
- 238000010583 slow cooling Methods 0.000 description 11
- 229910000859 α-Fe Inorganic materials 0.000 description 11
- 229910001566 austenite Inorganic materials 0.000 description 9
- 150000001247 metal acetylides Chemical class 0.000 description 9
- 150000004767 nitrides Chemical class 0.000 description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 238000010791 quenching Methods 0.000 description 5
- 230000000171 quenching effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 239000006104 solid solution Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000010953 base metal Substances 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- 238000003303 reheating Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000005501 phase interface Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 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
- 230000007704 transition Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- C22C38/02—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
- 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
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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
- 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
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- Metallurgy (AREA)
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Metal Rolling (AREA)
Abstract
【解決手段】 Nb≧0.025%、Ti≧0.005%で、0.045%≦Nb+2Ti≦0.105%を満たすように含有し、A=(Nb+2Ti)×(C+N×12/14)の値が0.0022〜0.0055を満たす範囲で含有し、鋼組織が、ベイナイトが30vol%以上、かつパーライトおよび島状マルテンサイトの和が5vol%未満であることを特徴とする高張力鋼板。また、該成分系の鋼片を、T(=6300/(1.9−Log(A))−273)℃以上に加熱し、920℃超、1020℃未満での累積圧下率を15%以下とし、860〜920℃での累積圧下率を20〜50%とする圧延に引き続き、加速冷却を800℃以上から開始し、鋼板温度が600〜700℃で加速冷却を停止することを特徴とする鋼板の製造方法。
【選択図】 なし
Description
T=6300/(1.9−Log(A))−273
ここで、A=([Nb]+2×[Ti])×([C]+[N]×12/14)であり、[Nb]、[Ti]、[C]、[N]はそれぞれNb、Ti、C、Nの質量%を意味する。
(1) 質量%で、C:0.03%以上、0.07%以下、Si:0.1%以上、0.6%以下、Mn:0.8%以上、2.0%以下、Al:0.003%以上、0.1%以下を含有し、さらに、Nb、Tiを、Nb:0.025%以上、Ti:0.005%以上で、かつ、0.045%≦[Nb]+2×[Ti]≦0.105%を満たすように含有し、さらに、N:0.0025%超、0.008%以下を含有し、さらに、Nb、Ti、C、Nを、下記に示されるAの値が、0.0022以上、0.0055以下となる関係を満足する範囲で含有し、溶接割れ感受性指数Pcmが0.18以下であり、残部Feおよび不可避不純物からなる成分組成を有するとともに、鋼組織が、ベイナイトの体積率が30%以上、かつパーライトおよび島状マルテンサイトの体積率の和が5%未満であることを特徴とする、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。
A=([Nb]+2×[Ti])×([C]+[N]×12/14)、
Pcm=[C]+[Si]/30+[Mn]/20+[Cu]/20+[Ni]/60+[Cr]/20+[Mo]/15+[V]/10+5[B]。
ここで、[Nb]、[Ti]、[C]、[N]、[Si]、[Mn]、[Cu]、[Ni]、[Cr]、[Mo]、[V]、[B]はそれぞれNb、Ti、C、N、Si、Mn、Cu、Ni、Cr、Mo、V、Bの質量%を意味する。
(2) さらに、質量%で、Mo:0.05%以上、0.3%以下を含有することを特徴とする、上記(1)に記載の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。
(3) さらに、質量%で、Cu:0.1%以上、0.8%以下、Ni:0.1%以上、1%以下、Cr:0.1%以上、0.8%以下、V:0.01%以上、0.03%未満、W:0.1%以上、3%以下、B:0.0005%以上、0.005%以下の1種または2種以上を含有することを特徴とする、上記(1)または(2)に記載の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。
(4) さらに、質量%で、Mg:0.0005%以上、0.01%以下、Ca:0.0005%以上、0.01%以下の1種または2種を含有することを特徴とする、上記(1)ないし(3)のいずれか1項に記載の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。
(5) 上記(1)ないし(4)のいずれか1項に記載の成分組成を有する鋼片または鋳片を、下記に示されるT(℃)以上、1300℃以下に加熱し、1020℃以上の温度範囲での粗圧延の後、1020℃未満、920℃超の範囲での圧延は累積圧下率を15%以下に抑制し、920℃以下、860℃以上の範囲での累積圧下率を20%以上、50%以下とする仕上げ圧延を行い、これに引き続き、冷却速度が2℃/sec以上、30℃/sec以下となる加速冷却を800℃以上から開始し、700℃以下、600℃以上で該加速冷却を停止して、その後0.4℃/sec以下の冷却速度で冷却することを特徴とする、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の製造方法。
T=6300/(1.9−Log(A))−273
ここで、A=([Nb]+2×[Ti])×([C]+[N]×12/14)であり、[Nb]、[Ti]、[C]、[N]はそれぞれNb、Ti、C、Nの質量%を意味する。
T=6300/(1.9−Log(A))−273
ここで、A=([Nb]+2×[Ti])×([C]+[N]×12/14)であり、[Nb]、[Ti]、[C]、[N]はそれぞれNb、Ti、C、Nの質量%を意味する。しかし、1300℃を超える加熱温度とするとオーステナイト粒径が粗大化して靭性低下の原因ともなるので、圧延時の鋼片または鋳片の加熱温度はT(℃)以上、1300℃以下とする。
Claims (5)
- 質量%で、
C :0.03%以上、0.07%以下、
Si:0.1%以上、0.6%以下、
Mn:0.8%以上、2.0%以下、
Al:0.003%以上、0.1%以下
を含有し、さらに、Nb、Tiを、
Nb:0.025%以上、
Ti:0.005%以上
で、かつ、
0.045%≦[Nb]+2×[Ti]≦0.105%
を満たすように含有し、さらに、
N :0.0025%超、0.008%以下
を含有し、さらに、Nb、Ti、C、Nを、下記に示されるAの値が、0.0022以上、0.0055以下となる関係を満足する範囲で含有し、溶接割れ感受性指数Pcmが0.18以下であり、残部Feおよび不可避不純物からなる成分組成を有するとともに、鋼組織が、ベイナイトの体積率が30%以上、かつパーライトおよび島状マルテンサイトの体積率の和が5%未満であることを特徴とする、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。
A=([Nb]+2×[Ti])×([C]+[N]×12/14)
Pcm=[C]+[Si]/30+[Mn]/20+[Cu]/20+[Ni]/60+[Cr]/20+[Mo]/15+[V]/10+5[B]
ここで、[Nb]、[Ti]、[C]、[N]、[Si]、[Mn]、[Cu]、[Ni]、[Cr]、[Mo]、[V]、[B]は、それぞれNb、Ti、C、N、Si、Mn、Cu、Ni、Cr、Mo、V、Bの質量%で表した含有量を意味する。 - さらに、質量%で、
Mo:0.05%以上、0.3%以下
を含有することを特徴とする、請求項1に記載の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。 - さらに、質量%で、
Cu:0.1%以上、0.8%以下、
Ni:0.1%以上、1%以下、
Cr:0.1%以上、0.8%以下、
V :0.01%以上、0.03%未満、
W :0.1%以上、3%以下、
B :0.0005%以上、0.005%以下
の1種または2種以上を含有することを特徴とする、請求項1または請求項2に記載の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。 - さらに、質量%で、
Mg:0.0005%以上、0.01%以下、
Ca:0.0005%以上、0.01%以下
の1種または2種を含有することを特徴とする、請求項1ないし請求項3のいずれか1項に記載の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。 - 請求項1ないし請求項4のいずれか1項に記載の成分組成を有する鋼片または鋳片を、下記に示されるT(℃)以上、1300℃以下に加熱し、1020℃以上の温度範囲での粗圧延の後、1020℃未満、920℃超の範囲での圧延は累積圧下率を15%以下に抑制し、920℃以下、860℃以上の範囲での累積圧下率を20%以上、50%以下とする仕上げ圧延を行い、これに引き続き、冷却速度が2℃/sec以上、30℃/sec以下となる加速冷却を800℃以上から開始し、700℃以下、600℃以上で該加速冷却を停止して、その後0.4℃/sec以下の冷却速度で冷却することを特徴とする、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の製造方法。
T=6300/(1.9−Log(A))−273
ここで、
A=([Nb]+2×[Ti])×([C]+[N]×12/14)
であり、[Nb]、[Ti]、[C]、[N]はそれぞれNb、Ti、C、Nの質量%で表した含有量を意味する。
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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 |
KR1020077001678A KR100868571B1 (ko) | 2004-07-27 | 2005-02-14 | 음향 이방성이 작고 용접성이 우수한 고장력 강판 및 그제조 방법 |
CN2005800251441A CN1989266B (zh) | 2004-07-27 | 2005-02-14 | 声各向异性小的焊接性优异的高强度钢板及其制造方法 |
US11/658,334 US20080295920A1 (en) | 2004-07-27 | 2005-02-14 | High Tension Steel Plate with Small Acoustic Anisotropy and with Excellent Weldability and Method of Production of Same |
PCT/JP2005/002663 WO2006011257A1 (ja) | 2004-07-27 | 2005-02-14 | 音響異方性が小さく溶接性に優れる高張力鋼板およびその製造方法 |
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 |
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JP2009068050A (ja) * | 2007-09-11 | 2009-04-02 | Kobe Steel Ltd | 母材低温靭性に優れた大入熱溶接用高張力鋼板 |
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-
2004
- 2004-07-27 JP JP2004218492A patent/JP4317499B2/ja active Active
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2005
- 2005-02-14 US US11/658,334 patent/US20080295920A1/en not_active Abandoned
- 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
- 2005-02-14 CN CN2005800251441A patent/CN1989266B/zh not_active Expired - Fee Related
- 2005-02-25 TW TW094105799A patent/TWI298353B/zh not_active IP Right Cessation
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Publication number | Publication date |
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JP4317499B2 (ja) | 2009-08-19 |
KR20070027733A (ko) | 2007-03-09 |
KR100868571B1 (ko) | 2008-11-13 |
TW200604351A (en) | 2006-02-01 |
CN1989266A (zh) | 2007-06-27 |
CN1989266B (zh) | 2013-09-18 |
WO2006011257A1 (ja) | 2006-02-02 |
TWI298353B (en) | 2008-07-01 |
US20080295920A1 (en) | 2008-12-04 |
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