JP2008190030A - 化成処理性に優れた高強度冷延鋼板の製造方法および製造設備 - Google Patents
化成処理性に優れた高強度冷延鋼板の製造方法および製造設備 Download PDFInfo
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- JP2008190030A JP2008190030A JP2007320511A JP2007320511A JP2008190030A JP 2008190030 A JP2008190030 A JP 2008190030A JP 2007320511 A JP2007320511 A JP 2007320511A JP 2007320511 A JP2007320511 A JP 2007320511A JP 2008190030 A JP2008190030 A JP 2008190030A
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- 239000000126 substance Substances 0.000 title claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 156
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 107
- 239000010959 steel Substances 0.000 claims abstract description 107
- 238000000137 annealing Methods 0.000 claims abstract description 100
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000005554 pickling Methods 0.000 claims abstract description 48
- 229910052742 iron Inorganic materials 0.000 claims abstract description 44
- 238000007747 plating Methods 0.000 claims abstract description 36
- 229910001335 Galvanized steel Inorganic materials 0.000 claims abstract description 32
- 239000008397 galvanized steel Substances 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000009792 diffusion process Methods 0.000 claims abstract description 18
- 238000001953 recrystallisation Methods 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 26
- 229910052760 oxygen Inorganic materials 0.000 claims description 26
- 239000001301 oxygen Substances 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 235000021110 pickles Nutrition 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 40
- 229910052748 manganese Inorganic materials 0.000 abstract description 38
- 230000001590 oxidative effect Effects 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 description 16
- 238000007254 oxidation reaction Methods 0.000 description 16
- 238000010791 quenching Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000000171 quenching effect Effects 0.000 description 8
- 239000011701 zinc Substances 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 239000002436 steel type Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
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- 238000007789 sealing Methods 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000237503 Pectinidae Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- -1 dew point -40 ° C) Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 239000008155 medical solution Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- 150000003839 salts Chemical class 0.000 description 1
- 235000020637 scallop Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000005413 snowmelt Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
【解決手段】再結晶のための加熱に続く600〜250℃の鋼板温度範囲の一部または全てを含む冷却帯の冷却方式がガス冷却、放散冷却、冷却管冷却の1種または2種以上である連続焼鈍炉や連続焼鈍炉をもつ冷延鋼板/溶融亜鉛めっき鋼板兼用設備にて高強度冷延鋼板を連続焼鈍する場合において、前記鋼板温度範囲内で鋼板表面を鉄が酸化する雰囲気にさらして表面を酸化させ、焼鈍炉出側にて酸洗した後、鉄またはNiめっきを1〜50mg/m2施す。焼鈍炉を出たところの酸洗にて鋼板の鉄の酸化膜とともにSiやMn等の酸化膜を酸洗脱落させることにより、Si、Mn等の含有量が高くとも「すけ」のない化成処理性が良好な高強度冷延鋼板を得ることができる。
【選択図】図2
Description
鋼種A:Si:0.7%、Mn:2.8%
鋼種B:Si:1.0%、Mn:1.8%
鋼種C:Si:1.3%、Mn:1.2%
鋼種D:Si:1.8%、Mn:1.5%
2 ガス供給設備
3 酸素濃度計または露点計
4 制御装置
5 弁
6 炉外通板部
7 シール装置
8 溶融亜鉛ポット
9 ウォータクエンチ槽
10 酸洗設備
11 Niめっき設備
12 ペイオフリール
13 溶接機
14 入側洗浄装置
15 入側ルーパー
16 連続焼鈍炉
17 加熱炉
18 均熱炉
19 徐冷炉
20 過時効炉
21 最終冷却炉
22 出側ルーパー
23 調質圧延機
24 テンションリール
Claims (7)
- 再結晶のための加熱に続く600〜250℃の鋼板温度範囲の一部または全てを含む冷却帯の冷却方式がガス冷却、放散冷却、冷却管冷却の1種または2種以上である連続焼鈍炉や連続焼鈍炉をもつ冷延鋼板/溶融亜鉛めっき鋼板兼用設備にて高強度冷延鋼板を連続焼鈍する場合において、前記鋼板温度範囲内で鋼板表面を鉄が酸化する雰囲気にさらし、焼鈍炉出側にて酸洗した後、鉄またはNiめっきを1〜50mg/m2施すことを特徴とする化成処理性に優れた高強度冷延鋼板の製造方法。
- 再結晶のための加熱に続く600〜250℃の鋼板温度範囲の一部または全てを含む冷却帯の冷却方式がガス冷却、放散冷却、冷却管冷却の1種または2種以上である連続焼鈍炉や連続焼鈍炉をもつ冷延鋼板/溶融亜鉛めっき鋼板兼用設備にて高強度冷延鋼板を連続焼鈍する場合において、前記鋼板温度範囲内の炉内に酸素または水蒸気を含有した雰囲気ガスを供給し、炉内の酸素濃度または露点を測定し、その測定結果から酸素または水蒸気を含有した雰囲気ガスの供給量を制御し、焼鈍炉出側にて酸洗した後、鉄またはNiめっきを1〜50mg/m2施すことを特徴とする化成処理性に優れた高強度冷延
鋼板の製造方法。 - 再結晶のための加熱に続く600〜250℃の鋼板温度範囲の一部または全ては炉外を通板することにより鋼板表面を鉄が酸化する雰囲気にさらすことを特徴とする請求項1に記載の化成処理性に優れた高強度冷延鋼板の製造方法。
- 高強度冷延鋼板の添加元素のうち、質量%でSiは1.0〜2.0%および/またはMnは2.0〜3.0%であることを特徴とする請求項1乃至3のいずれか1項に記載の化成処理性に優れた高強度冷延鋼板の製造方法。
- 再結晶のための加熱に続く600〜250℃の鋼板温度範囲の一部または全てを含む冷却帯の冷却方式がガス冷却、放散冷却、冷却管冷却の1種または2種以上である連続焼鈍炉や連続焼鈍炉をもつ冷延鋼板/溶融亜鉛めっき鋼板兼用設備において、前記鋼板温度範囲内で、鋼板周辺雰囲気に酸素または水蒸気を供給する設備を備え、焼鈍炉出側には酸洗設備と鉄またはNiめっき設備を備えることを特徴とする化成処理性に優れた高強度冷延鋼板の製造設備。
- 再結晶のための加熱に続く600〜250℃の鋼板温度範囲の一部または全てを含む冷却帯の冷却方式がガス冷却、放散冷却、冷却管冷却の1種または2種以上である連続焼鈍炉や連続焼鈍炉をもつ冷延鋼板/溶融亜鉛めっき鋼板兼用設備において、前記鋼板温度範囲内で、炉内に酸素または水蒸気を含有した雰囲気ガスを供給する設備を備え、炉内の酸素濃度または露点を測定する設備を有し、その測定結果から酸素または水蒸気を含有した雰囲気ガスの供給量を制御する制御装置を備え、焼鈍炉出側には酸洗設備と鉄またはNiめっき設備を備えることを特徴とする化成処理性に優れた高強度冷延鋼板の製造設備。
- 前記酸素または水蒸気を供給する設備は、鋼板を炉外通板し外気と接触させる設備であることを特徴とする請求項5に記載の化成処理性に優れた高強度冷延鋼板の製造設備。
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US11091818B2 (en) | 2015-12-23 | 2021-08-17 | Posco | High strength cold-rolled steel sheet and hot-dip galvanized steel sheet having excellent hole expansion, ductility and surface treatment properties, and method for manufacturing same |
WO2018173287A1 (ja) | 2017-03-24 | 2018-09-27 | 新日鐵住金株式会社 | 鋼板の製造方法 |
KR20190091306A (ko) | 2017-03-24 | 2019-08-05 | 닛폰세이테츠 가부시키가이샤 | 강판의 제조 방법 |
US11401567B2 (en) | 2017-03-24 | 2022-08-02 | Nippon Steel Corporation | Manufacturing method of steel sheet |
JP2023507726A (ja) * | 2019-12-17 | 2023-02-27 | ポスコホールディングス インコーポレーティッド | リン酸塩処理性に優れた高強度冷延鋼板及びその製造方法 |
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JP5058769B2 (ja) | 2012-10-24 |
KR20090088939A (ko) | 2009-08-20 |
EP3795716A1 (en) | 2021-03-24 |
RU2009130374A (ru) | 2011-02-20 |
EP2103715A1 (en) | 2009-09-23 |
EP2103715A4 (en) | 2017-01-04 |
RU2424331C2 (ru) | 2011-07-20 |
EP2103715B1 (en) | 2020-11-25 |
BRPI0806343B1 (pt) | 2018-10-09 |
WO2008084875A1 (ja) | 2008-07-17 |
CN101583740A (zh) | 2009-11-18 |
US20090308498A1 (en) | 2009-12-17 |
MX2009006665A (es) | 2009-09-14 |
US8834651B2 (en) | 2014-09-16 |
KR101129104B1 (ko) | 2012-03-27 |
CN101583740B (zh) | 2011-03-09 |
BRPI0806343A2 (pt) | 2011-09-06 |
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