KR100526135B1 - 용융아연도금 강판의 표면품질 향상방법 - Google Patents
용융아연도금 강판의 표면품질 향상방법 Download PDFInfo
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- KR100526135B1 KR100526135B1 KR10-2003-0075551A KR20030075551A KR100526135B1 KR 100526135 B1 KR100526135 B1 KR 100526135B1 KR 20030075551 A KR20030075551 A KR 20030075551A KR 100526135 B1 KR100526135 B1 KR 100526135B1
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- Prior art keywords
- steel sheet
- snout
- hot
- hot dip
- temperature
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 14
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 67
- 239000010959 steel Substances 0.000 claims abstract description 67
- 210000004894 snout Anatomy 0.000 claims abstract description 55
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000005246 galvanizing Methods 0.000 claims abstract description 33
- 238000007747 plating Methods 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 3
- 230000007547 defect Effects 0.000 abstract description 35
- 230000000694 effects Effects 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 45
- 239000011701 zinc Substances 0.000 description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 21
- 229910052725 zinc Inorganic materials 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 230000008020 evaporation Effects 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 9
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000137 annealing Methods 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical class [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000010301 surface-oxidation reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 230000002498 deadly effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000004380 ashing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
- C23C2/18—Removing excess of molten coatings from elongated material
- C23C2/20—Strips; Plates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/50—Controlling or regulating the coating processes
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
구분 | 타입1 | 타입2 | 타입3 | 타입4 |
색상 | 검은색 | 갈색 | 갈색 | 흰색 |
형태 | 분말형 | 분말형 | 편석형 | 분말형 |
아연성분함량(중량%) | 99.9 | 98.5 | 98.5 | 1 이내 |
스나우트 내부온도(℃) | 에시 발생량(g) | 스나우트 내부 드로스발생 정도 | 비고 |
320 | 4.2 (매우 많음) | 적음 | 불량 |
300 | 4.2 (매우 많음) | 적음 | 불량 |
280 | 3.9 (매우 많음) | 적음 | 불량 |
260 | 3.6 (많음) | 적음 | 불량 |
240 | 3.4 (많음) | 보통 | 불량 |
220 | 2.8 (보통) | 보통 | 불량 |
200 | 2.4 (보통) | 보통 | 양호 |
180 | 2.2 (적음) | 보통 | 양호 |
160 | 2.0 (적음) | 많음 | 불량 |
140 | 2.0 (적음) | 많음 | 불량 |
120 | 2.0 (적음) | 많음 | 불량 |
인입되는 강판의 온도(℃) | 에시 발생량(g) | 스나우트 내부 드로스발생 정도 | 비고 |
495 | 2.7 (많음) | 적음 | 불량 |
485 | 2.5 (많음) | 적음 | 불량 |
470 | 2.2 (많음) | 적음 | 불량 |
460 | 1.8 (보통) | 적음 | 양호 |
450 | 1.6 (적음) | 보통 | 양호 |
440 | 1.5 (적음) | 많음 | 불량 |
430 | 1.5 (적음) | 많음 | 불량 |
질소가스 유량(N㎥/h) | 에시 발생량(g) | 스나우트 내부 드로스발생 정도 | 표면결함 발생여부 | 비고 |
70 | 0.4 (적음) | 많음 | 표면거침 | 불량 |
60 | 0.6 (적음) | 보통 | 미세불량 | 불량 |
50 | 0.7 (적음) | 적음 | 양호 | 양호 |
40 | 0.8 (보통) | 적음 | 양호 | 양호 |
30 | 1.2 (많음) | 적음 | 양호 | 불량 |
강판의 냉각온도(℃) | 백색도 | 광택도 | 에시 부착량(개/㎡) | 비고 |
390 | 불량 | 불량 | 5~6 | 표면품질불량 |
380 | 불량 | 불량 | 3~4 | 표면품질불량 |
370 | 불량 | 보통 | 2~3 | 표면품질불량 |
360 | 보통 | 양호 | 1~2 | 표면품질보통 |
350 | 보통 | 양호 | 1~2 | 표면품질보통 |
340 | 양호 | 양호 | 0.5 | 표면품질양호 |
330 | 양호 | 양호 | 0.5 | 표면품질양호 |
320 | 양호 | 보통 | 0.5 | 표면품질보통 |
310 | 불량 | 보통 | 0.5 | 표면품질보통 |
300 | 불량 | 불량 | 1~2 | 표면품질불량 |
290 | 불량 | 불량 | 1~2 | 표면품질불량 |
280 | 불량 | 불량 | 2~3 | 표면품질불량 |
270 | 불량 | 불량 | 2~3 | 표면품질불량 |
260 | 불량 | 불량 | 3~4 | 표면품질불량 |
250 | 불량 | 불량 | 3~4 | 표면품질불량 |
구분 | 스나우트 내부분위기 온도(℃) | 도금욕 인입강판온도(℃) | 질소유량(N㎥/시간) | 냉각온도(℃) | 표면 에시개수(개/㎡) | 비고 |
비교예1 | 300 | 495 | 100 | 400 | 3~4 | 불량 |
비교예2 | 280 | 490 | 90 | 380 | 2~3 | 불량 |
비교예3 | 260 | 485 | 80 | 360 | 2~3 | 불량 |
비교예4 | 240 | 480 | 70 | 340 | 1~2 | 불량 |
비교예5 | 220 | 470 | 60 | 320 | 1~2 | 불량 |
비교예6 | 200 | 460 | 50 | 300 | 1~2 | 불량 |
비교예7 | 180 | 450 | 40 | 280 | 0.5~1 | 불량 |
비교예8 | 160 | 440 | 30 | 260 | 0.5~1 | 불량 |
비교예9 | 140 | 430 | 20 | 240 | 1~2 | 불량 |
비교예10 | 120 | 430 | 10 | 220 | 2~3 | 불량 |
발명예1 | 180 | 450 | 40 | 330 | 0.2 미만 | 양호 |
발명예2 | 181 | 451 | 41 | 331 | 0.2 미만 | 양호 |
발명예3 | 182 | 452 | 42 | 332 | 0.2 미만 | 양호 |
발명예4 | 183 | 453 | 43 | 333 | 0.2 미만 | 양호 |
발명예5 | 184 | 454 | 44 | 334 | 0.2 미만 | 양호 |
발명예6 | 185 | 455 | 45 | 335 | 0.2 미만 | 양호 |
발명예7 | 186 | 456 | 46 | 336 | 0.2 미만 | 양호 |
발명예8 | 187 | 457 | 47 | 337 | 0.2 미만 | 양호 |
발명예9 | 188 | 458 | 48 | 338 | 0.2 미만 | 양호 |
발명예10 | 189 | 459 | 49 | 339 | 0.2 미만 | 양호 |
발명예11 | 190 | 460 | 50 | 340 | 0.2 미만 | 양호 |
Claims (2)
- 잔류응력을 제거하기 위하여 냉연판을 소둔하고, 이어 상기 소둔된 강판이 스나우트(14)를 통하여 용융아연도금욕(44)에 인입되어 용융아연도금되며, 이후 에어나이프(15)에서 강판에 도금된 도금량을 원하는 수준으로 제어한 다음, 조질압연을 행하는 냉연강판의 용융아연도금방법에 있어서,상기 스나우트(14)의 내부 분위기 온도를 180~200℃로 제어하고,상기 용융아연도금욕(44)에 인입되는 강판온도를 450~460℃로 제어하며,상기 용융아연도금욕(44)과 스나우트(14) 분위기 가스 사이의 경계면에 시간당 40~50N㎥의 유량으로 질소가스를 분사하고,상기 용융아연도금욕(44)을 통과한 도금강판의 냉각온도를 330~340℃로 제어하는 것을 특징으로 하는 용융아연도금 강판의 표면품질 향상방법.
- 제 1항에 있어서, 상기 질소가스는 300~350mmH2O의 압력으로 제어되는 것을 특징으로 하는 용융아연도금 강판의 표면품질 향상방법.
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KR10-2003-0075551A KR100526135B1 (ko) | 2003-10-28 | 2003-10-28 | 용융아연도금 강판의 표면품질 향상방법 |
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KR10-2003-0075551A KR100526135B1 (ko) | 2003-10-28 | 2003-10-28 | 용융아연도금 강판의 표면품질 향상방법 |
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KR20050040362A KR20050040362A (ko) | 2005-05-03 |
KR100526135B1 true KR100526135B1 (ko) | 2005-11-08 |
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KR100742915B1 (ko) * | 2006-02-09 | 2007-07-25 | 주식회사 포스코 | 아연도금라인의 스나우트용 아연재 제거장치 |
KR101382903B1 (ko) * | 2012-07-31 | 2014-04-08 | 주식회사 포스코 | 스나우트 내 금속증기 저감방법 및 그 구현을 위한 스나우트 |
CN114990462B (zh) * | 2022-04-07 | 2024-05-10 | 首钢京唐钢铁联合有限责任公司 | 一种控制薄规格薄镀层锌铝镁产品黑线缺陷方法 |
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