KR20140058201A - Electroplated galvanizing the steel sheet having hair line appearance and method for manudacturing the same - Google Patents
Electroplated galvanizing the steel sheet having hair line appearance and method for manudacturing the same Download PDFInfo
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- KR20140058201A KR20140058201A KR1020120124932A KR20120124932A KR20140058201A KR 20140058201 A KR20140058201 A KR 20140058201A KR 1020120124932 A KR1020120124932 A KR 1020120124932A KR 20120124932 A KR20120124932 A KR 20120124932A KR 20140058201 A KR20140058201 A KR 20140058201A
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- 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
- B21B1/227—Surface roughening or texturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
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- 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
- B21B37/58—Roll-force control; Roll-gap control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/37—Single-purpose machines or devices for grinding rolls, e.g. barrel-shaped rolls
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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
- C23C2/04—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
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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
- C23C2/04—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
- C23C2/12—Aluminium or alloys based thereon
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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
- C23C2/34—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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
본 발명은 헤어라인 외관을 갖는 용융도금강판 및 이를 제조하는 방법에 관한 것이다.
The present invention relates to a hot-dip coated steel sheet having a hairline appearance and a method for producing the same.
일반적으로 스테인리스 강재는 미려한 표면외관을 갖도록 하기 위하여 표면 마무리가 행해지는데, 상기 표면 마무리의 대표적인 예로서 강재 표면에 헤어라인 무늬를 형성하는 방법이 있다. 상기 헤어라인 마무리는 강재의 표면을 연마재로 연속적으로 연마하여 연마자국이 남도록 마무리한 것으로서, 연마표면이 머리카락처럼 길게 연속적으로 라인이 형성되는 하는 마무리 방법을 의미한다.Generally, the stainless steel material is subjected to surface finishing so as to have a beautiful surface appearance. As a typical example of the surface finishing, there is a method of forming a hairline pattern on the surface of a steel material. The hairline finishing refers to a finishing method in which a surface of a steel material is continuously polished with an abrasive material to finish an abrasive residue so that the surface of the abrasive surface is continuously formed as long as a hair.
통상의 헤어라인 마무리는 컨택트 휠을 회전시킴으로써 콘택트 휠과 아이들롤에 겹쳐 감겨 있는 연마벨트를 고속 회전시켜 언코일러로부터 코일러로 이동하는 스테인리스 강재의 표면을 연마 벨트로 연마하는 가공 방법인 것은 잘 알려져 있다.It is well known that a conventional hairline finishing method is a method of polishing a surface of a stainless steel material moving from an uncoiler to a coiler by a polishing belt by rotating a contact wheel and an abrasive belt wound over the idle roll at a high speed by rotating the contact wheel have.
이와 같이 표면 마무리가 행해진 스테인리스 강재는 내식성이 우수하면서도 미려한 표면외관을 갖게 됨으로써, 건축물이나 차량 등의 내·외장재 등에 널리 사용되고 있다.
The stainless steel material subjected to the surface finishing in this way is excellent in corrosion resistance and has an excellent surface appearance, and thus is widely used for interior and exterior materials such as buildings and vehicles.
그러나, 스테인리스 강재는 가격이 높아 경제적인 측면에서 불리한 단점이 있으며, 헤어라인 마무리를 행한 후 지문이나 외부 오염 등으로부터 방지를 위해 추가 도장을 행하는 경우에는 스테인리스 표면과 도장의 부착성 등이 떨어지는 문제가 있다. 또한, 표면 마무리를 위해 강재 표면에 헤어라인이 인쇄된 필름을 붙이기도 하는데, 이는 필름의 인쇄무늬가 다양하지 못하여 사용하는데에 한계가 있다.
However, the stainless steel material is disadvantageous in terms of economy due to its high price, and in the case of performing additional painting for prevention from fingerprints and external pollution after hairline finishing, there is a problem that the adhesion of the stainless steel surface and paint is inferior have. In addition, a film printed with a hair line on the surface of a steel sheet for surface finishing may be stuck on the surface of the steel sheet.
상기 스테인리스 강재에서 문제가 되는 비용적인 측면을 해결하기 위해, 용융도금강판 상에 헤어라인 무늬를 형성하는 방법이 제안된 바 있으나, 용융도금강판 상에 헤어라인 무늬를 형성시키기 위하여 도금층을 깎아내는 공정이 추가로 실시되어야 하므로 제조원가가 상승하는 요인이 되며, 또한 제품의 내식성이 저하되는 문제가 있다.
A method of forming a hairline pattern on a hot-dip galvanized steel sheet has been proposed in order to solve the problematic cost in the stainless steel material. However, in order to form a hairline pattern on a hot-dip galvanized steel sheet, The manufacturing cost is increased and the corrosion resistance of the product is deteriorated.
따라서, 기존의 헤어라인 무늬를 갖는 스테인리스 강재와 동등 또는 그 이상의 내식성을 가지면서, 건축재나 가전재 등의 사용에 적합한 헤어라인 외관을 갖는 강재의 제조가 요구된다.
Therefore, there is a demand for the production of a steel material having a hairline appearance suitable for use in construction materials, household electrical appliances, and the like while having corrosion resistance equal to or greater than that of a stainless steel material having an existing hairline pattern.
본 발명의 일 측면은, 기존 헤어라인 무늬를 갖는 스테인리스 강재의 용도와 동일하게 사용할 수 있는 내식성이 우수한 헤어라인 외관을 갖는 용융도금강판 및 이를 제조하는 방법에 대해 제공하고자 하는 것이다.
An aspect of the present invention is to provide a hot-dip coated steel sheet having excellent appearance of corrosion resistance, which can be used in the same manner as the use of stainless steel material having existing hairline patterns, and a method for manufacturing the same.
본 발명의 일 측면은, 헤어라인 외관을 갖는 용융도금강판의 제조방법으로서,One aspect of the present invention is a method for producing a hot-dip galvanized steel sheet having a hairline appearance,
용융도금강판을 준비하는 단계; 및 상기 용융도금강판을 조질압연(SPM)하여 상기 용융도금강판의 표면에 헤어라인 무늬를 형성하는 단계를 포함하고,Preparing a hot-dip coated steel sheet; And forming a hairline pattern on the surface of the hot-dip coated steel sheet by temper rolling (SPM) the hot-dip coated steel sheet,
상기 헤어라인 무늬의 형성은 조질압연(SPM)시 헤어라인 무늬가 가공된 워크롤(work roll)에 의해 행해지는 것을 특징으로 하는 헤어라인 외관을 갖는 용융도금강판의 제조방법을 제공한다.
Wherein the formation of the hairline pattern is carried out by a work roll having a hairline pattern at the time of temper rolling (SPM).
본 발명에 의하면, 용융도금강판을 압연하는 과정에서 헤어라인 무늬를 형성할 수 있으며, 이러할 경우 도금층을 훼손시키지 않으므로 내식성을 확보하면서, 선명한 헤어라인 무늬를 갖는 용융도금강판을 제조할 수 있다.According to the present invention, it is possible to form a hairline pattern in the process of rolling a hot-dip coated steel sheet, and in this case, since the plating layer is not damaged, a hot-dip coated steel sheet having a sharp hairline pattern can be manufactured while ensuring corrosion resistance.
또한, 상기 헤어라인 외관을 갖는 본 발명의 용융도금강판은 경제적인 측면에서 문제가 되었던 기존의 스테인리스 강재를 대체할 수 있으면서도, 경제적인 측면에서 매우 유리한 장점을 확보할 수 있다.
In addition, the hot-dip galvanized steel sheet of the present invention having hairline appearance can replace the conventional stainless steel, which is problematic from the economical point of view, and is advantageous in terms of economy.
본 발명자들은 고가의 알루미늄 또는 스테인리스 강재를 대체할 수 있으면서, 우수한 내식성을 갖는 강재에 대하여 연구한 결과, 연속용융도금라인 공정 중 조질압연 중에서 가공된 워크롤로부터 헤어라인 무늬를 형성하는 경우 도금층을 훼손하지 않으면서 내식성이 우수한 헤어라인 외관을 갖는 용융도금강판을 제조할 수 있음을 확인하고, 본 발명을 완성하기에 이르렀다.
The inventors of the present invention have conducted studies on steels having excellent corrosion resistance while being able to replace expensive aluminum or stainless steel steels. As a result, when forming hairline patterns from work rolls processed in temper rolling in a continuous hot dip coating line process, It is possible to produce a hot-dip galvanized steel sheet having an excellent appearance of a hair line without corrosion, and has completed the present invention.
이하, 본 발명을 상세히 설명한다.
Hereinafter, the present invention will be described in detail.
본 발명의 일 측면에서 제공하는 헤어라인 외관을 갖는 용융도금강판의 제조방법은, 용융도금강판을 준비하는 단계; 및 상기 용융도금강판을 조질압연(SPM)하여 상기 용융도금강판의 표면에 헤어라인 무늬를 형성하는 단계를 포함하는 과정에서 이루어질 수 있으며, 상기 방법에 의할 경우 도금층을 훼손하지 않으면서 헤어라인 무늬의 형성이 가능하며, 내식성이 우수한 용융도금강판을 제조할 수 있다.
A method of manufacturing a hot-dip galvanized steel sheet having a hairline appearance provided in an aspect of the present invention includes: preparing a hot-dip galvanized steel sheet; And forming a hairline pattern on the surface of the hot-dip coated steel sheet by temper rolling (SPM) the hot-dip galvanized steel sheet. According to this method, the hairline pattern It is possible to manufacture a hot-dip coated steel sheet excellent in corrosion resistance.
본 발명의 일 측면에서 제공하는 헤어라인 외관을 갖는 용융도금강판의 제조방법에 있어서, 먼저 용융도금강판을 준비하는 단계에 대하여 상세히 설명한다.In a method of manufacturing a hot-dip galvanized steel sheet having a hairline appearance provided in an aspect of the present invention, the step of preparing a hot-dip galvanized sheet will be described in detail.
본 발명에 따른 용융도금강판은 연속용융도금라인에서 생산되는데, 보다 상세하게는 퍼니스(furnace) 공정, 도금욕 공정 및 냉각 공정을 거쳐 용융도금강판이 제조된다.The hot dip galvanized steel sheet according to the present invention is produced in a continuous hot dip galvanizing line, and more specifically, a hot dip galvanized steel sheet is produced through a furnace process, a plating bath process and a cooling process.
여기서, 퍼니스(furnace) 공정은 강판이 도금욕 내에 침지되기 전 적절한 온도로 가열하는 공정으로서, 예열대, 온열대, 가열대, 냉각대 및 보열대를 거쳐 예열, 온열, 가열 및 보열을 통해 강판을 가열하는 단계이다. 이때, 예열대, 온열대 및 가열대 구간은 강판이 점차적으로 고온으로 가열되는 구간으로서, 예열대의 온도는 200~400℃, 온열대의 온도는 400~600℃ 및 가열대의 온도는 600~920℃인 것이 바람직하다. 이후, 냉각대는 가열된 강판을 후속되는 도금욕 공정을 위해 도금욕 온도 정도로 냉각하는 구간으로서, 480~750℃의 온도범위로 냉각대 구간을 설정함이 바람직하다. 이후, 보열대에서는 상기 냉각된 강판의 온도를 유지하는 구간으로서, 보열대의 온도범위는 440~700℃로 설정함이 바람직하다.
Here, the furnace process is a process of heating the steel sheet to an appropriate temperature before being immersed in the plating bath, and the steel sheet is preheated, heated, heated and heated through the preheating zone, the hot zone, the heating zone, the cooling zone, And heating. In the preheating zone, the warming zone and the heating zone, the steel sheet is gradually heated to a high temperature. The temperature of the preheating zone is 200 to 400 ° C, the temperature of the heating zone is 400 to 600 ° C and the temperature of the heating zone is 600 to 920 ° C desirable. Thereafter, the cooling zone is a period for cooling the heated steel sheet to about the plating bath temperature for the subsequent plating bath process, and it is preferable to set the cooling zone period to the temperature range of 480 to 750 ° C. Hereinafter, it is preferable to set the temperature range of the bobbin to 440 to 700 ° C as a period for maintaining the temperature of the cooled steel sheet in the bobbin table.
이후, 상기와 같이 퍼니스(furnace) 공정에서 열처리된 강판을 도금욕 공정 구간에서 도금 처리를 실시한다. 도금욕 공정은 용융도금욕조에 강판을 침지하여 용융도금을 실시하는 단계로서, 이 단계에 의할 경우 표면에 도금층이 형성된 강판을 얻을 수 있다.Thereafter, the steel sheet subjected to the heat treatment in the furnace process is subjected to the plating treatment in the plating bath process section. The plating bath step is a step of immersing a steel sheet in a hot-dip galvanizing bath to perform hot-dip coating, and in this step, a steel sheet having a plated layer formed on its surface can be obtained.
상기 도금욕 공정을 실시하기 위한 도금욕으로서, 본 발명에서는 중량%로 알루미늄(Al): 0.18~0.22% 및 잔부 아연(Zn)을 포함하는 용융아연욕, 실리콘(Si): 8.7~9.3%, 철(Fe): 2.0~3.0% 및 잔부 알루미늄(Al)을 포함하는 용융알루미늄욕 및 아연(Zn): 41.4~45.4%, 실리콘(Si): 1.2~2.0% 및 잔부 알루미늄(Al)을 포함하는 용융알루미늄-아연 도금욕 중 하나의 도금욕을 이용할 수 있다. 여기서, 도금욕으로서 용융아연욕을 이용할 경우 용융아연 도금층을 갖는 용융아연도금강판을 얻을 수 있으며, 도금욕으로서 용융알루미늄욕을 이용할 경우에는 용융알루미늄 도금층을 갖는 용융알루미늄도금강판을 얻을 수 있으며, 또한 도금욕으로서 용융알루미늄-아연 도금욕을 이용할 경우에는 용융알루미늄-아연 도금층을 갖는 용융알루미늄-아연도금강판을 얻을 수 있다.
As the plating bath for carrying out the plating bath process, a hot dip galvanizing bath containing 0.18 to 0.22% aluminum (Al) and the balance zinc (Zn), silicon (Si) in an amount of 8.7 to 9.3% , A molten aluminum bath containing 2.0 to 3.0% of iron (Fe) and the remainder aluminum (Al), 41.4 to 45.4% of zinc (Zn), 1.2 to 2.0% of silicon (Si) One of the molten aluminum-zinc plating baths may be used. Here, when a molten zinc bath is used as the plating bath, a hot-dip galvanized steel sheet having a hot-dip galvanized layer can be obtained, and when a molten aluminum bath is used as the plating bath, a hot- When a molten aluminum-zinc plating bath is used as the plating bath, a molten aluminum-zinc plated steel sheet having a molten aluminum-zinc plating layer can be obtained.
상기한 도금욕 공정시 용융아연도금강판의 경우 도금량은 100~700g/m2, 용융알루미늄 도금강판의 경우 도금량은 40~200g/m2, 용융알루미늄-아연도금강판의 도금량은 70~300g/m2으로 실시함이 바람직하다. 상술한 바에 의해 도금층을 갖는 도금강판에 헤어라인 무늬를 가공함에 있어서, 도금량이 일정량 이상으로 유지되지 못하면 무늬 가공 중 도금층이 훼손되어 도금강판 본래의 특성인 내식성이 훼손될 우려가 있으며, 반면 도금층이 너무 두꺼우면 후속되는 조질압연 공정에서 압연 부하의 우려가 있다.
For the above-described plating bath process when a hot-dip galvanized steel sheet coating weight is 100 ~ 700g / m 2, a molten aluminum-plated when the steel sheet coating weight is 40 ~ 200g / m 2, a molten aluminum-coating weight of the galvanized steel sheet is 70 ~ 300g / m 2 < / RTI > If the amount of plating is not maintained at a predetermined level or more during the processing of the hairline pattern on the plated steel sheet having the plated layer by the above-described method, the plating layer may be damaged during patterning to deteriorate corrosion resistance, which is a characteristic inherent to the plated steel sheet. If it is too thick, there is a risk of rolling load in the subsequent temper rolling process.
상기에 의해 도금욕 공정이 완료되면, 도금된 강판을 냉각 공정 구간에서 냉각 처리를 실시한다. 이때, 냉각은 냉각장치에 의해 실시되며, 여기서 사용되는 냉각장치는 통상의 강판을 냉각할 수 있는 어떠한 장치도 가능하다.When the plating bath process is completed as described above, the plated steel sheet is subjected to cooling treatment in the cooling process section. At this time, cooling is performed by a cooling device, and any cooling device used here can cool any ordinary steel sheet.
냉각이 완료된 용융도금강판은 강판과 도금층 사이에서 밀착성을 우수하게 확보할 수 있다.
The hot-dip coated steel sheet after cooling has excellent adhesion between the steel sheet and the plated layer.
이와 같이 준비된 용융도금강판은 여러 분야에서 폭넓게 이용될 수 있다. 특히, 용융아연도금강판의 경우에는 건축물의 지붕, 외벽재, 자동차 외판 및 부품 그리고 가전기기 등에 사용할 수 있으며, 용융알루미늄도금강판의 경우에는 알루미늄의 내식성과 표면의 미려함, 내열성, 열반사성이 우수하여 자동차, 가전부품 및 건축자재 등에 널리 사용할 수 있다. 그리고 용융알루미늄도금강판은 알루미늄을 용융 도금한 제품으로 알루미늄강판에 비해 원가적인 측면에서도 경쟁력을 가지는 제품이다. 또한, 용융알루미늄-아연도금강판은 Al-Zn-Si 을 혼합하여 용융도금한 강판으로서 내식성 및 내열성이 우수하여 지붕, 벽체, 울타리 등 건축분야, 농원용 파이프, 축사 등의 농업분야, 자동차 배기관, 연료 탱크, 배기파이프 등 자동차 분야, 온수기, 열교환기 등 산업용기 및 전기전자 분야 등에서 폭 넓게 사용될 수 있다.
The thus prepared hot-dip coated steel sheet can be widely used in various fields. In particular, in the case of hot-dip galvanized steel sheets, it can be used for roofs of buildings, exterior wall materials, automobile shell plates and parts, and household electric appliances. In the case of hot-dip coated aluminum sheets, the corrosion resistance, surface smoothness, heat resistance, , Home appliance parts and building materials. And the hot-dip coated steel sheet is a product that is hot-dip coated with aluminum and has a competitive edge in terms of cost compared with aluminum sheet. The hot-dip galvanized steel sheet is a hot-dip galvanized steel sheet obtained by mixing Al-Zn-Si. The steel sheet is excellent in corrosion resistance and heat resistance, and can be used in various fields such as construction fields such as roof, wall and fence, agricultural fields such as agricultural pipe, Fuel tanks, exhaust pipes, automobiles, water heaters, heat exchangers, industrial containers, and electric and electronic fields.
본 발명의 일 측면에서 제공하는 헤어라인 외관을 갖는 용융도금강판의 제조방법에 있어서, 상기한 바에 따라 용융도금강판의 제조가 완료되면, 이 용융도금강판을 조질압연(SPM)하여 표면에 헤어라인 무늬를 형성한다.In the method of manufacturing a hot-rolled steel sheet having a hairline appearance provided by an aspect of the present invention, when the production of the hot-dip galvanized steel sheet is completed according to the above, the hot-rolled steel sheet is subjected to temper rolling (SPM) To form a pattern.
조질압연(SPM)은 도금강판의 가공성 향상, 항복점 연신 제거, 형상교정, 표면외관 개선, 선영성 향상 및 도금 밀착성 개선 등의 목적으로 실시하는 공정으로서, 조질압연을 위한 설비는 예컨대, 상하 워크롤(work roll), 상하 백업롤(back up roll), 전후 디프렉터롤(deflector roll), 전후 텐션미터롤(tension meter roll) 및 안티크림핑롤(anti crimping roll)로 구성될 수 있다. 이때, 워크롤의 지름은 365~400mm, 백업롤의 지름은 700~750mm인 롤을 각각 사용할 수 있다. The rough rolling (SPM) is a process carried out for the purpose of improving the workability of a plated steel sheet, stretching and removing the yield point, correcting the shape, improving the surface appearance, improving the linearity and improving the plating adhesion, a work roll, a back up roll, a front and rear deflector roll, a tension meter roll, and an anti crimping roll. At this time, rolls having a work roll diameter of 365 to 400 mm and a backup roll diameter of 700 to 750 mm can be used, respectively.
일 예로, 상기 조질압연의 타입(type)이 4Hi-1 Stand일 경우, 압연하중(screw down force)은 최대 1000Ton, 발란스 실리더(balance cylinder)는 최대 30Ton/s, 프렉션 실리더(flexion cylinder)는 최대 30Ton/s, 연신율은 최대 2%, 롤 교환은 밀고 당기는 방식(push-pull)이 적용될 수 있다.
For example, when the type of the temper rolling is 4Hi-1 Stand, a screw down force of up to 1000Ton, a balance cylinder of up to 30Ton / s, a flexion cylinder ) Can be up to 30Ton / s, elongation can be up to 2%, and the roll exchange can be applied by push-pull.
한편, 본 발명에서는 상기와 같은 조질압연(SPM)시 용융도금강판 상에 헤어라인 무늬를 형성할 수 있다. 보다 구체적으로, 용융도금강판 상에 헤어라인 무늬의 형성은 워크롤(work roll)에 의해 행해질 수 있는데, 이를 위해 조질압연을 행하기 전 조질압연 설비 중 워크롤을 가공하는 단계가 수반될 수 있으며, 상기 워크롤을 가공하는 단계는 이하에서 상세히 설명한다.On the other hand, in the present invention, a hairline pattern can be formed on the hot-rolled steel sheet during the above-mentioned temper rolling (SPM). More specifically, the formation of the hairline pattern on the hot-dip galvanized steel sheet can be done by a work roll, which may involve the step of machining the work rolls of the temper rolling facility prior to the temper rolling , The step of processing the work roll is described in detail below.
본 발명에서는 연마지석을 이용하여 워크롤(work roll)을 가공할 수 있다. 앞서 설명한 것과 같이, 헤어라인 마무리는 강재의 표면을 연마재로 연속적으로 연마하여 연마자국이 남도록 마무리한 것인데, 본 발명에서는 이러한 원리로서 워크롤 상에 연마지석으로 연마하여 연마자국을 형성한 후, 이를 연속되는 압연과정에서 강판 상에 부여함으로써 머리카락처럼 길게 연속적인 라인 형태를 갖는 헤어라인 무늬를 형성하도록 할 수 있다.In the present invention, a work roll can be processed by using a grinding wheel. As described above, hairline finishing is a process in which the surface of a steel material is continuously polished with an abrasive material so as to leave an abrasive mark. In the present invention, as a principle of the present invention, after grinding with a grinding stone on a work roll to form an abrasive mark, It is possible to form a hairline pattern having a long continuous line shape like a hair by giving it on a steel sheet in a continuous rolling process.
상기와 같은 원리를 통해 워크롤(work roll)상에 연마자국 형성을 위한 가공시, 연마지석의 회전속도와 입자크기에 영향을 받는다. 따라서, 가공시 연마지석의 회전속도는 400~1400m/m로 설정하고, 입자크기는 지름이 30~100μm인 연마지석을 사용함이 바람직하다. The above principle is influenced by the rotation speed and the grain size of the abrasive wheel during processing for forming an abrasive mark on a work roll. Therefore, it is preferable to use a polishing stone having a diameter of 30 to 100 占 퐉 and a particle size of about 400 to 1400 m / m while rotating the abrasive wheel.
연마지석의 회전속도가 400m/m 미만이면 워크롤(work roll) 전체에 헤어라인 무늬가 거칠게 가공되고, 이러한 워크롤을 이용하여 도금강판에 헤어라인 무늬를 가공할 경우 도금층이 훼손될 우려가 있다. 반면, 회전속도가 1400m/m을 초과하게 되면 너무 빠른 속도로 인해 워크롤에 고르게 가공이 이루어지지 않을 우려가 있다. 또한, 사용되는 연마지석의 입자크기의 지름이 30μm 미만이면 입자의 크기가 너무 작아 워크롤에 헤어라인 무늬 가공시 헤어라인 무늬 형성이 이루어지지 않고, 반면 지름이 100μm를 초과하게 되면 워크롤의 표면이 너무 거칠어져 용융도금강판에 헤어라인 무늬를 가공할시 도금층을 훼손하게 되는 문제점이 있다.
If the rotation speed of the abrasive wheel is less than 400 m / m, the hairline pattern is roughly formed on the entire work roll, and when the hair line pattern is processed on the plated steel sheet by using such a work roll, the plating layer may be damaged . On the other hand, if the rotation speed exceeds 1400 m / m, the work roll may not be uniformly machined due to a too high speed. If the particle diameter of the used abrasive grains is less than 30 탆, the size of the particles is too small to form a hair line pattern on the work roll. On the other hand, when the diameter exceeds 100 탆, Is too coarse, the coating layer is damaged when the hair line pattern is processed on the hot-dip galvanized steel sheet.
상기 조건을 만족할 경우, 헤어라인 무늬와 직각방향의 표면조도(Ra)가 0.2~10.0μm 범위의 값을 갖도록 워크롤(work roll)을 가공할 수 있다. 만일, 워크롤의 표면조도(Ra)가 0.2μm 미만이면 헤어라인 무늬가 용융도금강판에 가공되지 않을 우려가 있으며, 반면 표면조도(Ra)가 10μm를 초과하게 되면 용융도금강판의 도금층을 크게 훼손하여 본래 용융도금강판이 가져야 할 특성인 내식성이 크게 떨어지는 결과를 초래할 수 있다.
When the above condition is satisfied, the work roll can be processed so that the surface roughness Ra in the direction perpendicular to the hairline pattern has a value in the range of 0.2 to 10.0 mu m. If the surface roughness (Ra) of the work roll is less than 0.2 占 퐉, the hairline pattern is not worked on the hot-dip coated steel sheet On the other hand, if the surface roughness (Ra) exceeds 10 탆, the surface of the molten plated steel sheet The plating layer is largely damaged, and the corrosion resistance, which is a characteristic inherent to the hot-dip coated steel sheet, can be greatly reduced.
또한, 연마지적을 이용하여 워크롤(work roll) 상에 연마자국을 형성함에 있어서, 연마지석의 이송속도를 조절함으로써, 워크롤 상에 형성되는 헤어라인의 무늬의 패턴을 조절할 수 있다. 바람직하게 이송속도는 0~10m/m 범위 내에서 설정할 수 있으며, 이에 따라 짧은 헤어라인 무늬 또는 일반적인 헤어라인 무늬 패턴으로 가공할 수 있다.
Further, in forming the abrasive mark on the work roll using the abrasive designation, the pattern of the pattern of the hair line formed on the work roll can be adjusted by adjusting the feeding speed of the abrasive grinding wheel. Preferably, the feed rate can be set within the range of 0 to 10 m / m, and accordingly, it can be processed into a short hairline pattern or a general hairline pattern.
이하, 실시예를 통해 본 발명에 대해 상세히 설명한다. 다만, 하기 실시예는 본 발명을 보다 상세히 설명하기 위한 것일 뿐 본 발명의 권리범위를 한정하지는 않는다.
Hereinafter, the present invention will be described in detail with reference to Examples. However, the following examples are intended to further illustrate the present invention and do not limit the scope of the present invention.
(( 실시예Example ))
연속용융도금라인에서 용융아연도금강판 및 용융알루미늄도금강판을 제조한 후, 상기 각각의 용융도금강판에 대하여 가공된 워크롤(work roll)을 사용하여 조질압연을 행하여 최종적으로 헤어라인 외관을 갖는 용융도금강판을 제조하였다.The hot-dip galvanized steel sheet and the hot-dip galvanized steel sheet were produced in a continuous hot-dip coating line, and then each of the hot-dip galvanized steel sheets was subjected to temper rolling using a work roll, A coated steel sheet was produced.
이때, 용융도금강판의 제조를 위한 소지강판으로는 두께 0.2~5.0mm, 폭 500~1500mm, 항복점 60kgf/mm2 이상, 인장강도 60kgf/mm2 이상, 연신율 0.1~5.0%를 갖는 강판을 이용하여 30~1000g/m2의 도금량으로 용융아연 또는 용융알루미늄 도금을 실시하여 각각의 용융도금강판을 제조하였다. At this time, a steel sheet having a thickness of 0.2 to 5.0 mm, a width of 500 to 1500 mm, a yield point of 60 kgf / mm 2 or more, a tensile strength of 60 kgf / mm 2 or more, and an elongation of 0.1 to 5.0% was used as a base steel sheet for producing a hot- Hot-dip galvanizing or hot-dip galvanizing at a coating amount of 30 to 1000 g / m 2 to prepare respective hot-dip coated steel sheets.
이후, 각각 다른 조건으로 가공된 워크롤을 이용하여 상기 용융도금강판상에 헤어라인 무늬의 패턴을 다르게 형성시켰다. 이때, 발명예 1-1은 지름이 60μm인 연마지석을 이용하여 회전속도 450m/m, 이동속도 8m/m로 가공한 워크롤을 이용하였으며, 발명예 1-2는 지름이 46μm인 연마지석을 이용하여 회전속도 450m/m, 이동속도 8m/m로 가공한 워크롤을 이용하였으며, 발명예 1-3은 지름이 46μm인 연마지석을 이용하여 회전속도 450m/m, 이동속도 5m/m로 가공한 워크롤을 이용하였으며, 발명예 1-4는 지름이 46μm인 연마지석을 이용하여 회전속도 450m/m, 이동속도 0m/m로 각 부분을 나누어서 가공한 워크롤을 이용하였다. 그리고, 발명예 2는 지름이 60μm인 연마지석을 이용하여 회전속도 450m/m, 이동속도 5m/m로 가공한 워크롤을 이용하였다.
Thereafter, a pattern of hairline patterns was formed on the molten steel plate using a work roll processed under different conditions. In this case, the inventive example 1-1 used a work roll having a diameter of 60 탆 and a working speed of 450 m / m and a moving speed of 8 m / m. Examples 1-2 used abrasive grains having a diameter of 46 탆 A work roll having a rotation speed of 450 m / m and a moving speed of 8 m / m was used. Examples 1-3 were produced by using a grinding wheel having a diameter of 46 μm and machining at a rotation speed of 450 m / m and a movement speed of 5 m / A work roll was used. Examples 1-4 were work rolls prepared by dividing each part at a rotational speed of 450 m / m and a moving speed of 0 m / m using a 46 μm diameter abrasive wheel. In Inventive Example 2, a work roll having a working speed of 450 m / m and a moving speed of 5 m / m was used using a grinding wheel having a diameter of 60 μm.
상기에 따라 제조된 헤어라인 외관을 갖는 각각의 용융도금강판과 기존의 헤어라인 외관을 갖는 알루미늄강판 및 스테인리스 강판들의 표면조도를 측정하여 하기 표 1에 나타내었으며, 또한 각각의 강판 표면에 형성된 헤어라인 무늬의 선명한 정도를 육안으로 관찰한 후 그 결과를 나타내었다.The surface roughness of each of the hot-dip coated steel sheet having the hairline appearance prepared as described above and the aluminum sheet and stainless steel sheet having the conventional hairline appearance were measured and shown in Table 1 below. The sharpness of the pattern was visually observed and the results were shown.
상기 헤어라인 무늬의 선명한 정도는 헤어라인 무늬 형성이 매우 형성한 경우에는 ◎, 선명한 경우에는 ○, 보통인 경우에는 △로 나타내었다.The sharpness of the hairline pattern was expressed as? When the hairline pattern formation was highly formed,? When it was clear, and? When it was normal.
강판Hot-dip galvanizing
Steel plate
강판Hot-dip galvanizing
Steel plate
강판Hot-dip galvanizing
Steel plate
강판Hot-dip galvanizing
Steel plate
도금강판Molten aluminum
Coated steel plate
(상기 표 1에서 Ra는 산술평균조도, Ry는 최대 높이, Rz는 평균 거칠기를 나타내는 표면조도 파라미터이다.)
(In Table 1, Ra is the arithmetic average roughness, Ry is the maximum height, and Rz is the surface roughness parameter indicating the average roughness.)
상기 표 1에 나타낸 바와 같이, 본 발명에 따라 가공된 워크롤을 이용하여 헤어라인 무늬(또는 짧은 헤어라인 무늬)를 형성시킨 발명예 1-1 내지 1-3에서 산술평균조도, 최대 높이, 평균 거칠기 값이 증가함에 따라 무늬가 더욱 선명해 지는 것을 알 수 있다. 또한, 헤어라인 무늬를 형성시킨 발명예 1-4와 발명예 2의 경우에도 표면조도 값이 증가함에 따라 헤어라인 무늬의 선명도가 향상되는 결과를 보였다. As shown in Table 1, in the inventions 1-1 to 1-3 in which hairline patterns (or short hairline patterns) are formed using the work rolls processed according to the present invention, arithmetic mean roughness, maximum height, As the roughness value increases, the pattern becomes clearer. In the case of Inventive Examples 1-4 and Inventive Example 2 in which hairline patterns were formed, the sharpness of the hairline pattern was improved as the surface roughness value was increased.
상기 발명예들을 종래예 1 및 2와 비교하여 보면, 짧은 헤어라인 무늬를 형성시키는 경우에는 산술평균조도 값이 1.51μm 일 때(발명예 1-3) 종래예 2의 스테인리스 강판과 유사한 선명도를 가짐을 확인할 수 있으며, 또한 헤어라인 무늬를 형성시키는 경우 산술평균조도 값이 1.44μm 일 때(발명예 2) 종래예 1의 알루미늄강판과 유사한 선명도를 가짐을 확인할 수 있었다.Comparing the inventions with those of Conventional Examples 1 and 2, when a short hairline pattern is formed, the sharpness is similar to that of the stainless steel sheet of Conventional Example 2 when the arithmetic average roughness value is 1.51 m (Examples 1-3) And it was confirmed that when the hairline pattern is formed, the arithmetic average roughness value is 1.44 μm (Example 2), and the sharpness is similar to that of the aluminum steel sheet of Conventional Example 1.
Claims (6)
용융도금강판을 준비하는 단계; 및
상기 용융도금강판을 조질압연(SPM)하여 상기 용융도금강판의 표면에 헤어라인 무늬를 형성하는 단계를 포함하고,
상기 헤어라인 무늬의 형성은 조질압연(SPM)시 헤어라인 무늬가 가공된 워크롤(work roll)에 의해 행해지는 것을 특징으로 하는 헤어라인 외관을 갖는 용융도금강판의 제조방법.
A method for producing a hot-dip galvanized steel sheet having a hairline appearance,
Preparing a hot-dip coated steel sheet; And
(SPM) the hot-dip coated steel sheet to form a hairline pattern on the surface of the hot-dip coated steel sheet,
Wherein the formation of the hairline pattern is performed by a work roll on which a hairline pattern is processed during a temper rolling process (SPM).
상기 워크롤(work roll)에 가공된 헤어라인 무늬는 지름이 30~100μm인 연마지석을 회전속도 400~1400m/m, 이송속도 0~10m/m 로 가공하는 것을 특징으로 하는 헤어라인 외관을 갖는 용융도금강판의 제조방법.
The method according to claim 1,
Characterized in that the hairline pattern processed on the work roll is processed at a rotation speed of 400 to 1400 m / m and a feed rate of 0 to 10 m / m at an abrasive wheel having a diameter of 30 to 100 μm. A method for producing a hot-dip coated steel sheet.
상기 워크롤(wolk roll)은 0.2~10.0μm의 표면조도(Ra)를 갖는 것을 특징으로 하는 헤어라인 외관을 갖는 용융도금강판의 제조방법.
The method according to claim 1,
Wherein the work roll has a surface roughness (Ra) of 0.2 to 10.0 占 퐉.
상기 조질압연(SPM)시 헤어라인 무늬가 가공된 워크롤(work roll)을 지날 때의 압연하중은 100~1000Ton인 것을 특징으로 하는 헤어라인 외관을 갖는 용융도금강판의 제조방법.
The method according to claim 1,
Wherein the rolling load at the time of the temper rolling (SPM) passes through a work roll having a hairline pattern is 100 to 1000 Tons.
상기 용융도금강판은, 소지강판을 용융아연욕, 용융알루미늄욕 및 용융알루미늄-아연욕 중 하나의 도금욕에 침지하여 용융아연 도금층, 용융알루미늄 도금층 및 용융알루미늄-아연 도금층 중 하나의 도금층을 갖는 용융도금강판인 헤어라인 외관을 갖는 용융도금강판의 제조방법.
The method according to claim 1,
The hot-dip galvanized steel sheet is produced by dipping a base steel sheet in one of a hot dip galvanizing bath, a hot molten aluminum bath and a hot-dip galvanizing bath to obtain a hot-dip galvannealed steel sheet having one plated layer of a hot- A method for manufacturing a hot-dip galvanized steel sheet having a hairline appearance which is a coated steel sheet.
상기 용융도금강판의 도금층의 부착량은 용융아연욕일 경우 100~700g/m2, 용융알루미늄욕일 경우 40~200g/m2, 용융알루미늄-아연욕일 경우 70~300g/m2인 헤어라인 외관을 갖는 용융도금강판의 제조방법.6. The method of claim 5,
Amount of deposition of the plating layer of the hot dip coating steel sheet, hot-dip zinc yokil case 100 ~ 700g / m 2, the molten aluminum yokil case 40 ~ 200g / m 2, molten aluminum - if zinc yokil 70 ~ 300g / m 2 in the melt having a hairline appearance A method of manufacturing a plated steel sheet.
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| WO2022081107A1 (en) * | 2020-10-12 | 2022-04-21 | Borcelik Celik San. Tic. A. S. | A process for improving characteristics of galvanized surfaces |
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| KR102363286B1 (en) | 2020-06-25 | 2022-02-15 | 포스코강판 주식회사 | Coated steel sheets with high light reflectance and the method of the same |
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| WO2022081107A1 (en) * | 2020-10-12 | 2022-04-21 | Borcelik Celik San. Tic. A. S. | A process for improving characteristics of galvanized surfaces |
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