KR101889193B1 - 내식성 및 가공성이 우수한 냉연강판 및 그 제조방법 - Google Patents
내식성 및 가공성이 우수한 냉연강판 및 그 제조방법 Download PDFInfo
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- KR101889193B1 KR101889193B1 KR1020160177186A KR20160177186A KR101889193B1 KR 101889193 B1 KR101889193 B1 KR 101889193B1 KR 1020160177186 A KR1020160177186 A KR 1020160177186A KR 20160177186 A KR20160177186 A KR 20160177186A KR 101889193 B1 KR101889193 B1 KR 101889193B1
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- 230000007797 corrosion Effects 0.000 title claims description 73
- 238000005260 corrosion Methods 0.000 title claims description 73
- 239000010960 cold rolled steel Substances 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 23
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 80
- 239000010959 steel Substances 0.000 claims description 80
- 229910052804 chromium Inorganic materials 0.000 claims description 17
- 229910052787 antimony Inorganic materials 0.000 claims description 16
- 229910052750 molybdenum Inorganic materials 0.000 claims description 16
- 229910052721 tungsten Inorganic materials 0.000 claims description 16
- 238000000137 annealing Methods 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 229910052758 niobium Inorganic materials 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 238000005097 cold rolling Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
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- 238000003303 reheating Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 29
- 230000000694 effects Effects 0.000 description 11
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000006104 solid solution Substances 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 238000005275 alloying Methods 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
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- 239000011780 sodium chloride Substances 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
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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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
-
- 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
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—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 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
- 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
- C21D8/0273—Final recrystallisation annealing
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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
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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
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- 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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
[관계식 1] 0.2 ≤ [Sb]/0.5+[Cr]/3.0+[Mo]/1.0+[W]/0.5 ≤ 1.5
(여기서, [Sb], [Cr], [Mo] 및 [W] 각각은 해당 원소의 함량(중량%)을 의미함)
Description
강종 | 합금 조성 (중량%) | ||||||
C | Si | Mn | Al | P | S | N | |
발명강1 | 0.003 | 0.050 | 0.212 | 0.033 | 0.008 | 0.009 | 0.003 |
발명강2 | 0.003 | 0.053 | 0.217 | 0.034 | 0.008 | 0.008 | 0.003 |
발명강3 | 0.003 | 0.053 | 0.206 | 0.030 | 0.009 | 0.008 | 0.003 |
발명강4 | 0.003 | 0.051 | 0.212 | 0.031 | 0.008 | 0.009 | 0.003 |
발명강5 | 0.003 | 0.052 | 0.213 | 0.034 | 0.009 | 0.008 | 0.003 |
발명강6 | 0.003 | 0.053 | 0.215 | 0.032 | 0.008 | 0.008 | 0.003 |
비교강1 | 0.003 | 0.050 | 0.208 | 0.034 | 0.008 | 0.009 | 0.003 |
비교강2 | 0.003 | 0.054 | 0.211 | 0.031 | 0.008 | 0.008 | 0.003 |
비교강3 | 0.003 | 0.055 | 0.219 | 0.031 | 0.008 | 0.008 | 0.003 |
비교강4 | 0.003 | 0.054 | 0.216 | 0.030 | 0.008 | 0.009 | 0.003 |
비교강5 | 0.003 | 0.054 | 0.219 | 0.034 | 0.009 | 0.008 | 0.003 |
비교강6 | 0.003 | 0.050 | 0.203 | 0.035 | 0.009 | 0.008 | 0.003 |
비교강7 | 0.021 | 0.055 | 0.209 | 0.032 | 0.009 | 0.008 | 0.003 |
비교강8 | 0.003 | 0.052 | 0.203 | 0.032 | 0.008 | 0.009 | 0.009 |
강종 | 합금 조성 (중량%) | 관계식 1 | ||||
Nb | Sb | Cr | Mo | W | ||
발명강1 | 0.214 | 0.154 | - | - | - | 0.31 |
발명강2 | 0.219 | - | 0.684 | - | - | 0.23 |
발명강3 | 0.214 | - | - | 0.329 | - | 0.33 |
발명강4 | 0.227 | - | - | - | 0.150 | 0.30 |
발명강5 | 0.215 | - | 1.120 | 0.450 | - | 0.82 |
발명강6 | 0.223 | 0.185 | 0.854 | 0.319 | 0.220 | 1.41 |
비교강1 | 0.218 | 0.031 | 0.251 | - | - | 0.15 |
비교강2 | 0.216 | - | - | 0.081 | 0.045 | 0.17 |
비교강3 | 0.230 | - | 0.315 | 0.057 | - | 0.16 |
비교강4 | 0.212 | 0.250 | 1.520 | 0.320 | 0.320 | 1.97 |
비교강5 | 0.085 | - | 0.450 | 0.325 | - | 0.48 |
비교강6 | 0.981 | - | - | 0.309 | - | 0.31 |
비교강7 | 0.225 | - | - | 0.323 | - | 0.32 |
비교강8 | 0.214 | - | - | 0.311 | - | 0.31 |
강종 | 복합 농화층 (원자%) | 결정립 평균 입경 (μm) |
부식감량 (mg/cm2) |
rm | 연신율 (%) | |
Nb 함량 최대값 | Sb, Cr, Mo 및 W 중 1종 이상의 함량의 합의 최대값 | |||||
발명강1 | 15.7 | 26.7 | 10.8 | 182 | 1.88 | 39.6 |
발명강2 | 14.2 | 22.3 | 10.7 | 178 | 1.89 | 39.7 |
발명강3 | 15.6 | 29.1 | 10.8 | 187 | 1.91 | 39.9 |
발명강4 | 14.2 | 26.6 | 10.6 | 190 | 1.87 | 39.5 |
발명강5 | 13.7 | 32.4 | 10.5 | 171 | 1.85 | 38.4 |
발명강6 | 14.6 | 36.8 | 10.5 | 159 | 1.80 | 38.0 |
비교강1 | 14.1 | 13.2 | 10.8 | 224 | 1.92 | 40.4 |
비교강2 | 13.6 | 14.6 | 10.8 | 211 | 1.91 | 39.9 |
비교강3 | 14.8 | 11.3 | 10.4 | 236 | 1.89 | 40.1 |
비교강4 | 13.1 | 32.6 | 9.8 | 151 | 1.70 | 36.4 |
비교강5 | 7.7 | 32.8 | 10.2 | 245 | 1.88 | 39.1 |
비교강6 | 24.6 | 32.6 | 9.6 | 188 | 1.42 | 37.6 |
비교강7 | 13.3 | 28.0 | 8.2 | 602 | 1.11 | 22.1 |
비교강8 | 13.2 | 28.2 | 8.5 | 485 | 1.25 | 25.6 |
Claims (9)
- 중량%로, C: 0.008% 이하(0% 제외), Si: 0.5% 이하(0% 제외), Mn: 0.1~0.5%, Al: 0.1% 이하(0% 제외), P: 0.01% 이하(0% 제외), S: 0.01% 이하, N: 0.005% 이하, Nb: 0.2~0.8%를 포함하고, Sb: 0.5% 이하, Cr: 3.0% 이하, Mo: 1.0% 이하 및 W: 0.5% 이하 중 1종 이상을 포함하며, 잔부 Fe 및 불가피한 불순물을 포함하고, 하기 관계식 1을 만족하는 냉연강판.
[관계식 1] 0.2 ≤ [Sb]/0.5+[Cr]/3.0+[Mo]/1.0+[W]/0.5 ≤ 1.5
(여기서, [Sb], [Cr], [Mo] 및 [W] 각각은 해당 원소의 함량(중량%)을 의미함)
- 제1항에 있어서,
부식 환경 하, 표면 직하에 두께 1μm 이하(0μm 제외)의 Nb와 Sb, Cr, Mo 및 W 중 1종 이상의 복합 농화층이 형성되는 냉연강판.
- 제2항에 있어서,
JASO M 611-92의 B 방법에 의해 부식시험을 실시하였을 때, Nb와 Sb, Cr, Mo 및 W 중 1종 이상의 복합 농화층 내 Nb 함량의 최대값이 10원자% 이상이고, Sb, Cr, Mo 및 W 중 1종 이상의 함량의 합의 최대값이 20원자% 이상인 냉연강판.
- 제1항에 있어서,
상기 냉연강판을 이루는 결정립들의 평균 입경이 9μm 이상인 냉연강판.
- 제1항에 있어서,
JASO M 611-92의 B 방법에 의해 부식시험을 실시하였을 때, 부식감량이 200mg/cm2 이하인 냉연강판.
- 제1항에 있어서,
소성 이방성 계수(Lankford value)의 평균값(rm)이 1.8 이상이고, 연신율이 38% 이상인 냉연강판.
- 제1항에 있어서,
그 표면에 알루미늄계 도금층이 형성된 냉연강판.
- 중량%로, C: 0.008% 이하(0% 제외), Si: 0.5% 이하(0% 제외), Mn: 0.1~0.5%, Al: 0.1% 이하(0% 제외), P: 0.01% 이하(0% 제외), S: 0.01% 이하, N: 0.005% 이하, Nb: 0.2~0.8%를 포함하고, Sb: 0.5% 이하, Cr: 3.0% 이하, Mo: 1.0% 이하 및 W: 0.5% 이하 중 1종 이상을 포함하며, 잔부 Fe 및 불가피한 불순물을 포함하고, 하기 관계식 1을 만족하는 슬라브를 1200℃ 이상의 온도로 재가열하는 단계;
상기 재가열된 슬라브를 Ar3℃ 이상의 온도에서 마무리 압연하여 열연강판을 얻는 단계;
상기 열연강판을 550~750℃에서 권취하는 단계;
상기 권취된 열연강판을 50~95%의 압하율로 냉간압연하여 냉연강판을 얻는 단계; 및
상기 냉연강판을 600~900℃에서 연속 소둔하는 단계;
를 포함하는 냉연강판의 제조방법.
[관계식 1] 0.2 ≤ [Sb]/0.5+[Cr]/3.0+[Mo]/1.0+[W]/0.5 ≤ 1.5
(여기서, [Sb], [Cr], [Mo] 및 [W] 각각은 해당 원소의 함량(중량%)을 의미함)
- 제8항에 있어서,
상기 연속 소둔 후, 상기 연속 소둔된 냉연강판의 표면에 알루미늄계 도금층을 형성하는 단계를 더 포함하는 냉연강판의 제조방법.
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KR1020160177186A KR101889193B1 (ko) | 2016-12-22 | 2016-12-22 | 내식성 및 가공성이 우수한 냉연강판 및 그 제조방법 |
CN201780077902.7A CN110088316A (zh) | 2016-12-22 | 2017-12-11 | 耐蚀性和加工性优异的冷轧钢板及其制造方法 |
EP17883774.6A EP3561099A4 (en) | 2016-12-22 | 2017-12-11 | COLD ROLLED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AND VERY GOOD SHAPEABILITY, AND METHOD FOR MANUFACTURING THE SAME |
PCT/KR2017/014438 WO2018117508A1 (ko) | 2016-12-22 | 2017-12-11 | 내식성 및 가공성이 우수한 냉연강판 및 그 제조방법 |
US16/472,252 US20190316240A1 (en) | 2016-12-22 | 2017-12-11 | Cold-rolled steel sheet having excellent corrosion resistance and formability, and method for manufacturing same |
JP2019554457A JP2020509244A (ja) | 2016-12-22 | 2017-12-11 | 耐食性及び加工性に優れた冷延鋼板及びその製造方法 |
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EP (1) | EP3561099A4 (ko) |
JP (1) | JP2020509244A (ko) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US12221707B2 (en) | 2018-11-30 | 2025-02-11 | Posco Co., Ltd | Acid-resistant steel sheet and manufacturing method therefor |
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- 2017-12-11 JP JP2019554457A patent/JP2020509244A/ja active Pending
- 2017-12-11 EP EP17883774.6A patent/EP3561099A4/en not_active Withdrawn
- 2017-12-11 US US16/472,252 patent/US20190316240A1/en not_active Abandoned
- 2017-12-11 WO PCT/KR2017/014438 patent/WO2018117508A1/ko unknown
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US12221707B2 (en) | 2018-11-30 | 2025-02-11 | Posco Co., Ltd | Acid-resistant steel sheet and manufacturing method therefor |
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JP2020509244A (ja) | 2020-03-26 |
CN110088316A (zh) | 2019-08-02 |
US20190316240A1 (en) | 2019-10-17 |
EP3561099A4 (en) | 2019-11-27 |
KR20180073404A (ko) | 2018-07-02 |
WO2018117508A1 (ko) | 2018-06-28 |
EP3561099A1 (en) | 2019-10-30 |
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