KR20120021730A - Method of surface treatment for cold rolled carbon steel sheet, and steel sheet thereby - Google Patents
Method of surface treatment for cold rolled carbon steel sheet, and steel sheet thereby Download PDFInfo
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- KR20120021730A KR20120021730A KR1020100078579A KR20100078579A KR20120021730A KR 20120021730 A KR20120021730 A KR 20120021730A KR 1020100078579 A KR1020100078579 A KR 1020100078579A KR 20100078579 A KR20100078579 A KR 20100078579A KR 20120021730 A KR20120021730 A KR 20120021730A
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- steel sheet
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 title claims description 15
- 239000010959 steel Substances 0.000 title claims description 15
- 238000004381 surface treatment Methods 0.000 title claims description 5
- 229910000975 Carbon steel Inorganic materials 0.000 title abstract description 4
- 239000010962 carbon steel Substances 0.000 title abstract description 4
- 238000007747 plating Methods 0.000 claims abstract description 29
- 238000005498 polishing Methods 0.000 claims abstract description 20
- 244000137852 Petrea volubilis Species 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000005554 pickling Methods 0.000 claims abstract description 7
- 239000010960 cold rolled steel Substances 0.000 claims description 66
- 238000007517 polishing process Methods 0.000 claims description 23
- 239000011701 zinc Substances 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000005246 galvanizing Methods 0.000 claims description 5
- 238000010422 painting Methods 0.000 claims description 5
- 238000003672 processing method Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000003801 milling Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000008373 pickled product Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- 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
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0436—Cold rolling
-
- 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
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Coating With Molten Metal (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
Description
본 발명은 냉연강판의 표면 가공 방법 및 그 방법으로 제조된 금속강판에 관한 것으로, 더욱 구체적으로는 냉간압연강판(CR; Cold Rolled Carbon Steel Sheet, 일명 냉연강판) 표면의 광택과 내식성을 향상시키기 위해 냉간압연강판의 표면에 샌드페이퍼 연마 또는 헤어라인 가공을 처리한 뒤 아연도금이나 주석도금(석도), 갈바륨도금, 알루미늄도금 또는 컬러페인팅을 순차적으로 진행하는 냉연강판의 표면 가공 방법 및 그 방법으로 제조된 금속강판에 관한 것이다.
The present invention relates to a method for processing a surface of a cold rolled steel sheet and a metal steel sheet manufactured by the method, and more particularly, to improve the gloss and corrosion resistance of a cold rolled carbon steel sheet (CR) surface. Surface treatment method of cold rolled steel sheet which is processed by sand paper polishing or hairline processing on the surface of cold rolled steel sheet and then galvanizing, tin plating (stone), galvalume plating, aluminum plating or color painting, and manufactured by the method It relates to a metal steel sheet.
일반적으로 자동차나 세탁기, 냉장고 등의 외장을 형성하는 금속판재는 외관의 광택이 좋아야 하고 미려해야 하며, 또한 습기 등에 의해 쉽게 부식되지 않는 내식성을 가지고 있어야만 한다.In general, the metal plate forming the exterior of a car, a washing machine, a refrigerator, etc. should have a good gloss of appearance and be beautiful, and also have corrosion resistance not easily corroded by moisture.
이에 따라 내식성이 우수하고 표면 광택 가공시 광택이 우수한 특성을 가진 것으로 알려진 스테인리스 강판(Stainless Steel)을 사용하는 것이 바람직하나, 스테인리스 강판은 재료 자체가 고가인데다 일반 강판에 비하여 프레스 공정 등의 가공성이 좋지 않은 등, 경제성과 생산성이 저하되는 문제점이 있다.Accordingly, it is preferable to use stainless steel, which is known to have excellent corrosion resistance and excellent gloss when processing surface gloss. However, stainless steel sheet is expensive in terms of material itself and has good workability such as pressing process compared to general steel sheet. And the like, there is a problem that the economics and productivity is lowered.
상기 스테인리스 강판을 대체하여 사용할 수 있는 방안으로 냉간압연강판(CR; Cold Rolled Carbon Steel Sheet,이하, '냉연강판'이라 약칭함)의 사용을 들 수 있다.A method that can be used to replace the stainless steel sheet may include the use of cold rolled steel sheets (hereinafter referred to as 'cold rolled steel sheets').
냉연강판은 열연코일을 소재로 산세 공정을 통해 표면스케일을 제거하고, 두께 약 0.15?3mm 정도까지 압연한 후 소둔과 조질압연 등을 거쳐 생산한 강판으로서 열연강판에 비해 두께가 얇고 두께정도(精度)가 우수하며 평활하고 가공성이 우수하다는 장점 때문에 자동차, 가전기기, 가구, 사무용품, 차량, 건축자재 등에 직접 사용되거나 아연, 알루미늄, 주석, 크롬 등의 도금용 원판으로 사용되고 있다.Cold rolled steel is a hot-rolled steel sheet whose surface scale is removed through a pickling process, rolled to a thickness of about 0.15 to 3mm, and then produced through annealing and temper rolling, which is thinner and hotter than hot rolled steel. ), It is used directly in automobiles, home appliances, furniture, office supplies, vehicles, building materials, or as a base plate for plating of zinc, aluminum, tin, and chromium.
그러나 냉연강판을 그대로 사용하거나 분체도장 혹은 예컨대 아연도금을 하여 사용하는 경우, 여러가지 문양을 넣을 수 없기 때문에 외관이 단조롭다는 문제점이 있다.However, when the cold rolled steel sheet is used as it is, or when powder coating or zinc plating is used, various patterns cannot be put in, so that the appearance is monotonous.
또한, 냉연강판 표면에 전기적으로 아연을 도금한 전기아연도금강판((EGI; Electrolytic Galvanized Iron) 또는 용융아연도금강판(GI; Galvanized Iron) 위에 특정 문양을 가미하거나 광택을 내기 위해 샌드페이퍼 연마(No.4 표면 가공) 혹은 헤어라인(HL; Hair Line) 가공을 하는 경우 도금층이 벗겨지기 때문에 쉽게 부식되는 등 내식성이 나쁘다는 문제점이 있다.
In addition, sandpaper polishing (No. 4 surface processing) or hair line (HL) processing, there is a problem that the corrosion resistance is bad, such as easy to corrode because the plating layer is peeled off.
상기의 제반 문제점을 해결하기 위해 안출된 본 발명은, 강판의 재료비가 저가여서 경제성이 있으면서도 가공이 용이하고 표면 광택을 저해하지 않으며 내식성이 우수하여 자동차나 가전제품, 건축자재 등 다양한 용도로 활용할 수 있도록 한 냉연강판의 표면 가공 방법 및 그 방법으로 제조된 금속강판을 제공하는데 그 목적이 있다.
The present invention devised to solve the above problems, the material cost of the steel sheet is low cost, economical and easy to process, does not interfere with the surface gloss and excellent corrosion resistance can be utilized in various applications such as automobiles, home appliances, building materials, etc. It is an object of the present invention to provide a method for processing a surface of a cold rolled steel sheet and a metal steel sheet manufactured by the method.
상기 목적을 달성하기 위한 본 발명의 냉연강판의 표면 가공 방법은, 열연코일을 소재로 산세 공정, 압연 공정으로 냉연강판을 제조하는 냉연강판 제조 단계와, 상기 냉연강판의 표면에 연마 공정을 통해 표면을 연마 처리하는 연마 처리 단계와, 상기 표면 연마 처리된 냉연강판의 표면에 도금 공정으로 표면을 코팅하는 단계를 코팅 단계를 포함하여 이루어지는 것을 특징으로 한다.Surface treatment method of the cold rolled steel sheet of the present invention for achieving the above object, the cold rolled steel sheet manufacturing step of manufacturing a cold rolled steel sheet by a pickling process, a rolling process based on the hot rolled coil, and the surface of the cold rolled steel sheet through a polishing process And a coating step of coating a surface by a plating process on the surface of the cold rolled steel sheet subjected to the polishing, and polishing the polishing process.
바람직한 실시예로서 상기 연마 공정은, 샌드페이퍼(Sandpaper)에 의한 연마 공정일 수 있다.In a preferred embodiment, the polishing process may be a polishing process by sandpaper.
또한, 상기 샌드페이퍼 연마 공정은, 제1냉연강판 롤러로부터 인출된 냉연강판의 표면을 적어도 하나 또는 복수 개의 샌드페이퍼 롤러에 순차적으로 접촉시켜서 연마할 수 있다.In the sandpaper polishing step, the surface of the cold rolled steel sheet drawn out from the first cold rolled steel sheet roller may be polished by sequentially contacting at least one or a plurality of sand paper rollers.
이때 상기 복수 개의 샌드페이퍼 롤러의 각 롤러 메쉬(mesh)는, 순차적으로 점차 조밀하게 형성된다.At this time, each of the roller mesh (mesh) of the plurality of sand paper roller, is formed gradually denser gradually.
바람직한 실시예로서 상기 샌드페이퍼 연마 공정은, 냉연강판의 표면 분류 상 No.4(#4)의 표면 연마 가공 또는 헤어라인(HL; Hair Line) 표면 연마 가공인 것일 수 있다.As a preferred embodiment, the sandpaper polishing process may be a surface polishing process of No. 4 (# 4) or a hair line surface polishing process on a surface classification of a cold rolled steel sheet.
바람직한 실시예로서 상기 코팅 단계는, 전기아연도금 또는 용융아연도금일 수 있다.
In a preferred embodiment, the coating step may be electro zinc plating or hot dip galvanizing.
본 발명에 따르면, 스테인리스 강판보다 상대적으로 가격이 낮은 냉연강판을 이용하므로 경제적이면서도 가공성이 우수하고, 판재 두께나 형태를 다양하게 조절할 수 있다는 이점이 있다.According to the present invention, since the cold rolled steel sheet having a relatively lower price than the stainless steel sheet is used, it is economical and excellent in workability, and there is an advantage in that the thickness and form of the plate can be variously adjusted.
또한, 냉연강판의 표면에 샌드페이퍼 가공 또는 헤어라인 가공 등의 연마 공정을 먼저 수행한 뒤, 그 표면에 도금 공정을 수행하므로, 표면에 다양한 문양을 가미할 수 있으면서도 도금 코팅층이 쉽게 벗겨지지 않음은 물론 광택이 우수하고 습기 등에 의해 쉽게 부식되지 않는 등, 광택성과 내식성이 향상되는 등의 이점이 있다.
In addition, since a polishing process such as sand paper processing or hairline processing is first performed on the surface of the cold rolled steel sheet, and then the plating process is performed on the surface, the plating coating layer is not easily peeled off while adding various patterns to the surface. There is an advantage that the gloss and corrosion resistance are improved, such as being excellent in gloss and not easily corroded by moisture or the like.
도 1은 본 발명의 실시예에 따른 냉연강판의 표면 가공 방법을 보인 블록도이다.
도 2는 본 발명의 실시예에 따른 냉연강판의 샌드페이퍼 연마 공정을 보인 구성도이다.1 is a block diagram showing a surface processing method of a cold rolled steel sheet according to an embodiment of the present invention.
Figure 2 is a block diagram showing a sandpaper polishing process of a cold rolled steel sheet according to an embodiment of the present invention.
이하, 본 발명의 바람직한 실시예를 보인 첨부의 도면을 참조하여 본 발명을 더욱 상세하게 설명한다. Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention will be described in more detail the present invention.
그러나 첨부된 실시예는 본 발명의 이해를 돕기 위한 일 실시예이므로 본 발명을 한정하는 것으로 의도되지 않으며, 또한 당해 분야에서 통상의 지식을 가진 자에게 자명한 기술이거나 용이하게 도출되는 정도의 기술에 대해서는 그에 관한 상세한 설명을 생략하기로 한다.It should be understood, however, that there is no intention to limit the invention to the particular form disclosed, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. A detailed description thereof will be omitted.
도 1은 본 발명의 실시예에 따른 냉연강판의 표면 가공 방법을 보인 블록도이다.1 is a block diagram showing a surface processing method of a cold rolled steel sheet according to an embodiment of the present invention.
도 1을 참조하는 바와 같이, 본 발명에 따른 냉연강판의 표면 가공 방법은, 열연코일을 소재로 산세 공정, 압연 공정으로 냉연강판을 제조하는 냉연강판 제조 단계(S1)와, 상기 냉연강판의 표면에 연마 공정을 통해 표면을 연마 처리하는 표면 연마 단계(S2)와, 상기 표면 연마 처리된 냉연강판의 표면에 도금 공정으로 표면을 코팅하는 단계를 코팅 단계(S3)를 포함하여 이루어진다.As shown in Figure 1, the method for processing the surface of a cold rolled steel sheet according to the present invention, the cold rolled steel sheet manufacturing step (S1) of manufacturing a cold rolled steel sheet by a pickling process, a rolling process based on the hot rolled coil, and the surface of the cold rolled steel sheet The surface polishing step (S2) for polishing the surface through the polishing process, and the step of coating the surface on the surface of the surface-treated cold rolled steel plate by a plating process comprises a coating step (S3).
보다 구체적으로, 상기 냉연강판의 제조 단계(S1)는, 열연강판을 산세, 냉간압연, 어닐링, 조질 압연공정을 거쳐서 제조하는 것으로, 이는 통상적인 방법이므로 이에 관한 상세한 설명은 생략한다.More specifically, in the manufacturing step (S1) of the cold rolled steel sheet, the hot rolled steel sheet is manufactured through a pickling, cold rolling, annealing, and temper rolling process, which is a conventional method, and thus detailed description thereof will be omitted.
상기 냉연강판의 표면 연마 단계(S2)는, 냉연강판의 표면을 깍아냄과 동시에 미세한 요철을 형성하여 표면 코팅물의 점착성을 향상시키는 동시에 광택을 형성하기 위한 것으로서 도 1과 같이 샌드페이퍼(Sandpaper)에 의한 연마 공정에 의해 수행될 수 있다.Surface polishing step (S2) of the cold rolled steel sheet, to form a fine concavo-convex and at the same time to the surface of the cold rolled steel sheet to improve the adhesion of the surface coating and to form a gloss as shown in Figure 1 by sandpaper (Sandpaper) It can be carried out by a polishing process.
도 2는 본 발명의 실시예에 따른 냉연강판의 샌드페이퍼 연마 공정을 보인 구성도로서, 도 2를 참조하는 바와 같이 샌드페이퍼에 의한 연마 공정은, 제1냉연강판 롤러(11)로부터 인출된 냉연강판(10)의 표면을 적어도 하나 또는 복수 개의 샌드페이퍼 롤러(20)에 순차적으로 접촉시켜서 연마하는 공정을 포함한다.FIG. 2 is a block diagram illustrating a sand paper polishing process of a cold rolled steel sheet according to an exemplary embodiment of the present invention. As illustrated in FIG. 2, the sand paper polishing process may include a cold rolled steel sheet drawn from the first cold rolled
샌드페이퍼 롤러(20)에 의해 표면 연마 처리된 냉연강판(10)은 다시 제2냉연강판 롤러(12)로 되감아져서 상품화될 수 있다.The cold rolled
이때, 상기 샌드페이퍼 롤러(20)에 의해 연마 처리된 냉연강판(10)은 고무재 등으로 제조된 스크래퍼(30)와 접촉되면서 연마 처리 과정에서 발생한 표면 이물질이 제거될 수 있다. 또한, 샌드페이퍼 롤러(20)와의 마찰열 제거용으로 분사된 물기를 제거하기 위해 열풍건조기(40)에 의해서 표면 건조 처리될 수 있다.At this time, the cold rolled
도 2와 같이 표면 연마 처리시 샌드페이퍼 롤러가 복수 개 형성된 경우, 각 샌드페이퍼 롤러의 메쉬(mesh)는, 순차적으로 점차 조밀하게 형성된다. 예를 들면 제1롤러(21)의 표면이 800메쉬였다면, 제2롤러(22)는 1000메쉬, 제3롤러(23)는 1100메쉬, 제4롤러(24)는 1200메쉬와 같은 형태로 배치하며, 이와 같이 하면 냉연강판의 표면에 점차 조밀하게 연마 처리될 수 있다.When a plurality of sand paper rollers are formed during the surface polishing process as shown in FIG. 2, meshes of the sand paper rollers are gradually densely formed sequentially. For example, if the surface of the
상기 샌드페이퍼 롤러에 의한 연마 공정은 KS L6001(연마재 입도 규정)에 의해 150~180메쉬의 연마재로 표면을 가공함으로써 냉연강판의 표면 분류 상 No.4(#4)에 준한 표면을 형성하거나, 또는 No.4(#4)에 준한 냉연강판의 제품 표면에 150~180메쉬의 연마벨트를 이용하여 연속된 무늬가 형성되도록 한 헤어라인(HL; Hair Line)에 준한 표면을 형성할 수 있다.In the polishing process by the sand paper roller, the surface is processed according to No. 4 (# 4) on the surface classification of cold rolled steel sheet by processing the surface with 150 ~ 180 mesh abrasive according to KS L6001 (abrasive particle size regulation), or No The surface of the product of the cold rolled steel sheet according to .4 (# 4) may be formed by using a polishing belt of 150 to 180 mesh to form a surface according to the hair line (HL) to form a continuous pattern.
여기서 냉연강판은 표면의 조밀도 혹은 광택도에 따라 다음과 같이 분류된다.The cold rolled steel is classified as follows according to the density or gloss of the surface.
No.1 : 열간압연 후 열처리 및 산세처리한 제품의 표면No.1: The surface of heat treated and pickled products after hot rolling
No.2B : 냉간압연 후 열치러 및 산세처리한 후 조질압연한 제품의 표면No.2B: The surface of the product after hot rolling and hot rolling after pickling
No.3 : No.2B의 제품을 100~120메쉬의 연마벨트로 연마한 제품의 표면No.3: Surface of the product of No.2B polished with 100 ~ 120 mesh abrasive belt
No.4 : No.2B의 제품을 150~180메쉬의 연마벨트로 연마한 제품의 표면No.4: Surface of the product of No.2B polished with 150 ~ 180 mesh abrasive belt
HL(Hair Line) : No.4 제품을 150~180메쉬의 연마벨트를 이용하여 연속된 무늬가 형성되도록 처리한 제품의 표면HL (Hair Line): The surface of the product which processed No.4 product to form continuous pattern by using 150 ~ 180 mesh polishing belt.
본 발명에서 연마 공정 후의 냉연강판의 표면이 위 분류표로 제한되는 것은 아니나, 가전제품이나 건축자재 등에 사용하기 적합한 표면을 이루기 위해서는 위 분류 상 N0.4 혹은 HL로 가공하는 것이 바람직하다.In the present invention, the surface of the cold rolled steel sheet after the polishing process is not limited to the above classification table, but in order to form a surface suitable for use in home appliances or building materials, it is preferable to process with N0.4 or HL.
한편, 도 1에서 상기 코팅 단계(S3)는, 전기아연도금, 용융아연도금과 같은 아연도금이나, 주석도금(석도), 갈바륨(GV)도금, 알루미늄도금 또는 컬러페인팅을 포함한다.On the other hand, the coating step (S3) in Figure 1, galvanized, such as electro-galvanized, hot dip galvanized, tin plating (quartz), galvalume (GV) plating, aluminum plating or color painting.
상기 전기아연도금은, 냉연강판 상태에서 위 설명과 같이 No.4 또는 HL 연마 처리한 뒤, 전기작용에 의하여 아연을 도금하는 것으로서, 이와 같이 하면 전기아연도금강판(EGI; Electrolytic Galvanized Iron)을 제조할 수 있다.The electro-galvanizing, as described above in the cold-rolled steel sheet No. 4 or HL polishing, and then zinc by electroplating, in this way to produce an electrolytic galvanized iron (EGI) can do.
일반적으로 전기아연도금강판(EGI)은 전해법에 의해 냉연강판 또는 열연강판 표면에 아연피복을 입혀 내식성을 높인 제품으로 일반적으로 후술하는 용융도금강판에 비하여 도금량이 적고 균일하며 평활하기 때문에 도장 마무리성, 도장 후 내식성이 뛰어난 것으로 알려져 있다.In general, electro-galvanized steel sheet (EGI) is a product coated with zinc coating on the surface of cold-rolled steel sheet or hot-rolled steel sheet by electrolytic method to improve corrosion resistance. It is known to be excellent in corrosion resistance after painting.
상기 전기아연도금에 비해 용융아연도금은 열에 의해 아연을 용융시킨 아연통에 냉연강판을 디핑(deeping)하여 표면에 아연을 도금하여 용융아연도금강판(GI; Galvanized Iron)을 제조하는 것이다.Compared to the electro-zinc plating, hot-dip galvanizing is to produce a galvanized iron (GI) by plating zinc on the surface by dipping a cold-rolled steel sheet into a zinc cylinder in which zinc is melted by heat.
상기 주석도금은 냉연강판의 표면 연마 처리 후, 주석을 피복시키는 것으로서, 주석은 아름다운 광택을 가지며, 쉽게 변색하지 않기 때문에 식품 용기나 금속인쇄의 하지도금으로 사용되고 있다. 이와 같이 주석도금을 실시하면 석도강판(STPE)이 제조된다.The tin plating is to coat the tin after the surface polishing treatment of the cold rolled steel sheet, and since tin has a beautiful luster and does not easily discolor, it is used as a base plate for food containers or metal printing. When the tin plating is carried out as described above, a steel sheet steel sheet (STPE) is manufactured.
상기 알루미늄 도금은 냉연강판의 표면 연마 처리 후 알루미늄을 피복시키는 것으로, 알루미늄은 내열성, 내식성, 열반사성 등의 특성을 가지고 있으며, 이와 같이 코팅하면 알루미늄도금강판(AL-COSTA, AL-COAT)이 제조된다.The aluminum plating is to coat the aluminum after the surface grinding treatment of the cold-rolled steel sheet, aluminum has characteristics such as heat resistance, corrosion resistance, heat reflection, etc., if the coating is made of aluminum plated steel sheet (AL-COSTA, AL-COAT) do.
상기 갈바륨(GA; Galvalume) 도금은 알루미늄과 아연의 합금을 도금하는 것으로, 알루미늄과 아연 합금욕조에 표면 연마 처리된 냉연강판을 통과시켜서 급냉시켜서 제조한다. 갈바륨강판은 냉연강판이나 아연도금강판에 비해 내구성과 내열성이 우수하고, 열반사성도 양호하며, 은백색의 미려한 표면외관을 지니는 특성이 있다.The galvalume (GA) plating is to plate an alloy of aluminum and zinc, and is manufactured by quenching by passing a cold rolled steel sheet subjected to surface polishing through an aluminum and zinc alloy bath. Galvalume steel sheet has excellent durability and heat resistance compared with cold rolled steel sheet or galvanized steel sheet, has good heat reflectivity, and has a beautiful white appearance.
상기 컬러페인팅은 색상을 가진 페인트를 표면 연마 처리된 냉연강판 상에 피복시켜서 소망하는 컬러를 나타내도록 한 것이다.The color painting is to coat a colored paint on a surface polished cold rolled steel sheet to exhibit a desired color.
여기서, 본 발명과 같이 냉연강판의 표면에 도금하기 전, 먼저 샌드페이퍼 등으로 표면 연마 처리한 후 아연도금을 실시하면, 냉연강판과 도금 코팅층의 점착력이 향상되기 때문에 도금이 벗겨지거나 박리되지 않게 되어 내식성과 내구성을 향상시킬 수 있게 된다.Here, before plating on the surface of the cold rolled steel sheet as in the present invention, if the surface is first polished with sandpaper or the like, then the zinc plating is performed, the adhesion between the cold rolled steel sheet and the coating layer is improved, so that the plating is not peeled off or peeled off. And durability can be improved.
이상의 설명은 비록 본 발명이 상기에서 언급한 바람직한 실시예와 관련하여 설명되어졌지만, 본 발명의 요지와 범위로부터 벗어남이 없이 다른 다양한 수정 및 변형이 가능하다는 것은 당업자라면 용이하게 인식할 수 있을 것이며, 이러한 변경 및 수정은 모두 첨부된 특허청구범위에 속함은 자명하다.
Although the above description has been made in connection with the preferred embodiments mentioned above, it will be readily apparent to those skilled in the art that various other modifications and variations can be made without departing from the spirit and scope of the invention. It is obvious that all such changes and modifications belong to the appended claims.
10: 냉연강판
11: 제1냉연강판 롤러 12: 제2냉연강판 롤러
20: 샌드페이퍼 롤러
30: 스크레이퍼
40: 열풍건조기10: cold rolled steel sheet
11: first cold rolled steel sheet roller 12: second cold rolled steel sheet roller
20: sandpaper roller
30: scraper
40: hot air dryer
Claims (8)
상기 냉연강판의 표면에 연마 공정을 통해 표면을 연마 처리하는 표면 연마 단계;
상기 표면 연마 처리된 냉연강판의 표면에 도금 공정으로 표면을 코팅하는 코팅 단계;
를 포함하여 이루어지는 것을 특징으로 하는 냉연강판의 표면 가공 방법.
A cold rolled steel sheet manufacturing step of manufacturing a cold rolled steel sheet using a hot rolled coil as a pickling process or a rolling process;
A surface polishing step of polishing the surface of the cold rolled steel sheet by a polishing process;
A coating step of coating a surface of the surface polished cold rolled steel sheet by a plating process;
Surface processing method of the cold rolled steel sheet comprising a.
상기 연마 공정은, 샌드페이퍼(Sandpaper)에 의해 연마 처리되는 것을 특징으로 하는 냉연강판의 표면 가공 방법.
The method of claim 1,
The polishing step is a surface treatment method of a cold rolled steel sheet, characterized in that the polishing process by sandpaper (Sandpaper).
상기 샌드페이퍼 연마 공정은, 제1냉연강판 롤러로부터 인출된 냉연강판의 표면을 적어도 하나 또는 복수 개의 샌드페이퍼 롤러에 순차적으로 접촉시켜서 연마하는 것을 특징으로 하는 냉연강판의 표면 가공 방법.
The method of claim 2,
In the sand paper polishing step, the surface of the cold rolled steel sheet drawn out from the first cold rolled steel sheet roller is sequentially polished by contacting at least one or a plurality of sand paper rollers.
상기 복수 개의 샌드페이퍼 롤러의 각 롤러 메쉬(mesh)는, 순차적으로 점차 조밀하게 형성된 것을 특징으로 하는 냉연강판의 표면 가공 방법.
The method of claim 3,
Each roller mesh of the plurality of sandpaper rollers is formed in a progressively denser manner, the surface processing method of the cold rolled steel sheet.
상기 샌드페이퍼 연마 공정은, 냉연강판의 표면 분류 상 No.4(#4)의 표면 연마 가공 또는 헤어라인(HL; Hair Line) 표면 연마 가공인 것을 특징으로 하는 냉연강판의 표면 가공 방법.
The method of claim 2,
The said sandpaper grinding | polishing process is the surface grinding | polishing process of No. 4 (# 4) or the hair line (HL; Hair Line) surface grinding | polishing process on the surface classification of a cold rolled steel sheet.
상기 코팅 단계는, 전기아연도금, 용융아연도금, 주석도금, 알루미늄도금, 갈바륨도금, 컬러페인팅 중 어느 하나인 것을 특징으로 하는 냉연강판의 표면 가공 방법.
The method of claim 1,
The coating step, the surface treatment method of the cold-rolled steel sheet, characterized in that any one of electro zinc plating, hot dip galvanizing, tin plating, aluminum plating, galvalume plating, color painting.
상기 연마 처리 단계 후, 표면에 잔존하는 이물질이 제거되도록 냉연강판의 표면이 스크래퍼와 접촉되거나, 습식 연마 공정에서 투입된 물을 제거하기 위해 열풍 건조되는 것을 특징으로 하는 냉연강판의 표면 가공 방법.
The method of claim 1,
After the polishing step, the surface of the cold rolled steel sheet is in contact with the scraper or hot-air dried to remove the water introduced in the wet polishing process so that foreign matter remaining on the surface is removed.
The metal steel sheet manufactured by the surface processing method of the cold rolled steel sheet in any one of Claims 1-7.
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| KR (1) | KR20120021730A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200071340A (en) * | 2018-12-11 | 2020-06-19 | 주식회사 포스코 | Apparatus for refining magnetic domains to grain oriented electrical steel |
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2010
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200071340A (en) * | 2018-12-11 | 2020-06-19 | 주식회사 포스코 | Apparatus for refining magnetic domains to grain oriented electrical steel |
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