KR20020079074A - Pre-embossed hot-dip galvanized steel sheet - Google Patents
Pre-embossed hot-dip galvanized steel sheet Download PDFInfo
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- KR20020079074A KR20020079074A KR1020010019720A KR20010019720A KR20020079074A KR 20020079074 A KR20020079074 A KR 20020079074A KR 1020010019720 A KR1020010019720 A KR 1020010019720A KR 20010019720 A KR20010019720 A KR 20010019720A KR 20020079074 A KR20020079074 A KR 20020079074A
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- South Korea
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- steel sheet
- embossed
- hot
- dip galvanized
- galvanized steel
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- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 19
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- 238000005260 corrosion Methods 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 11
- 239000011701 zinc Substances 0.000 claims abstract description 11
- 239000010960 cold rolled steel Substances 0.000 claims abstract description 6
- 238000007747 plating Methods 0.000 claims description 38
- 238000000576 coating method Methods 0.000 claims description 27
- 239000011248 coating agent Substances 0.000 claims description 25
- 238000000137 annealing Methods 0.000 claims description 5
- 238000003618 dip coating Methods 0.000 claims description 2
- 238000004049 embossing Methods 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 36
- 239000010959 steel Substances 0.000 description 36
- 238000005246 galvanizing Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 238000009713 electroplating Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000003973 paint Substances 0.000 description 6
- 238000005238 degreasing Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002987 primer (paints) Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000005507 spraying Methods 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
본 발명은 엠보스 용융아연도금강판에 관한 것이다. 본 발명은 특히 용융도금법(hot-dip galvanizing process)을 이용하여 강판에 무늬형태의 입체감을 부여함을 목적으로 무늬가 새겨진 엠보스로울로 강판을 압하처리하여 엠보스 무늬를 부여하고, 부식방지를 위해 연속용융도금라인에서 아연을 엠보스처리된 강판위에 용융도금하여 제조되도록한 엠보스 용융아연도금강판(Pre-embossed Hot-dip galvanized steel sheet)에 관한 것이다.The present invention relates to an embossed hot dip galvanized steel sheet. In particular, the present invention provides an embossed pattern by pressing a steel plate with an embossed roll engraved with a pattern for the purpose of giving a three-dimensional shape of the pattern to the steel sheet by using a hot-dip galvanizing process. The present invention relates to an embossed hot-dip galvanized steel sheet which is manufactured by hot-plating zinc on an embossed steel sheet in a continuous hot dip plating line.
현재까지 강판에 무늬형태의 입체감을 부여한 엠보스 냉연강판이 많이 사용되어 왔으나 무늬를 부여한 냉연강판은 외관이 극히 중요함에도 강판자체의 녹발생에 따른 부식문제가 심하였으므로 부식방지와 외관의 미려성을 위해 가공전 또는 가공후에 스프레이 도장을 행하거나 연속도장공정에서 PCM(Pre-Coated Metal) 도장처리를 행하여 왔다.Until now, many embossed cold rolled steel sheets, which gave a three-dimensional appearance to the steel plate, have been used. However, even though the appearance of the cold rolled steel sheet is extremely important, corrosion problems due to the rust of the steel plate itself were severe. To do this, spray coating is performed before or after processing, or PCM (Pre-Coated Metal) coating treatment has been performed in a continuous coating process.
그러나 도장 가공된 엠보스 냉연강판은 도장처리에 의해 내식성을 부여하였다고 하더라도 강판자체의 녹발생에 따른 부식문제가 근본적으로 해결되지 못하였으므로 판넬재 및 지붕재와 같은 건축외장재에서 요구하는 내식성을 만족시키지 못해 주로 가전제품의 패널 또는 케이스와 같은 상대적으로 낮은 수준의 내식성을 가진 내장제품의 용도로 제한되고 사용되어 용도상의 제한이 있었다.However, even if the coated embossed cold rolled steel sheet is given corrosion resistance by coating, the corrosion problem due to the rust of steel sheet itself is not solved fundamentally, and thus it cannot satisfy the corrosion resistance required by building exterior materials such as panel and roof materials. It was mainly limited to the use of interior products having a relatively low level of corrosion resistance such as panels or cases of home appliances, and thus there was a limitation in use.
또한, 근본적인 내식성 문제를 해결하기 위하여 아연도금을 이용한 강판이라하더라도 종래의 전기도금제조공정으로는 통상 40g/㎡이하의 아연도금이 가능하였을뿐 40g/㎡이상 특히, 80g/㎡이상의 고내식성을 겨냥한 엠보스강판의 제조는 품질면을 도외시하더라도 생산성이 용융아연도금공정보다 매우 낮아 현실적으로 작업성 및 생산성 저하라는 문제가 있었다.In addition, even in the case of a steel plate using zinc plating to solve the fundamental corrosion resistance problem, the conventional electroplating manufacturing process is usually possible to galvanized less than 40g / ㎡, but more than 40g / ㎡ in particular, high corrosion resistance of more than 80g / ㎡ Even if the quality of the embossed steel sheet is neglected, the productivity is much lower than that of the hot dip galvanizing process.
또한, 엠보스무늬의 각인 깊이가 통상 30㎛이하의 것으로, 그 이상으로 깊이 선명하게 각인 하는 것은 종래에는 극히 어려웠으며, 특히 그중에서도 50㎛이상의 깊이로 무늬 홈을 각인하는 것은 매우 곤란하였다.In addition, the stamping depth of the embossed pattern is usually 30 µm or less, and it is extremely difficult to stamp the depth sharply more than that, and in particular, it is very difficult to imprint the pattern groove with a depth of 50 µm or more.
따라서, 본 발명은 상기와 같은 문제점을 감안하여 창출된 것으로서, 본 발명의 목적은 도장 처리가 용이하고 도장처리 후에 건축외장재와 같은 높은 내식성을 요구하는 용도에 사용이 가능하도록함과 아울러 필요에 따라 광택을 부여할 수 있도록 하여 주므로써 광범위한 용도에 걸쳐 경제적으로 입체감 있고 미려하고도 선명한 외관을 가지며 종래의 EGL 엠보스강판보다 내식성이 보다 우수한 엠보스 용융아연도금강판을 제공함을 목적으로 한다.Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to allow for use in applications requiring easy corrosion treatment and requiring high corrosion resistance such as building exterior materials after coating treatment, as required. The purpose of the present invention is to provide an embossed hot dip galvanized steel sheet which is economically three-dimensional, beautiful and clear in appearance over a wide range of applications, and has better corrosion resistance than conventional EGL embossed steel sheets.
제 1 도는 본 발명상의 용융아연도금강판의 단면사진이다.1 is a cross-sectional photograph of a hot-dip galvanized steel sheet according to the present invention.
제 2 도는 본 발명상의 엠보스부위 단면 확대 사진이다.2 is an enlarged photograph of a cross section of an embossed portion of the present invention.
제 3 도는 본 발명에 의한 용융아연도금시의 엠보스부위의 도금피복상태(B)와 종래 전기도금시의 엠보스부위의 도금피복상태(A)를 단면상으로 비교하여 본 설명도이다.3 is an explanatory view in which the plating coating state (B) of the embossed portion at the time of hot dip galvanizing according to the present invention is compared with the plating coating state (A) of the embossed portion at the time of conventional electroplating in cross section.
(도면의 주요부분에 대한 부호설명)(Code description of main parts of drawing)
1. 강판소재1. Steel plate material
2. 엠보스 홈2. Embossed Home
3. 아연도금층3. Galvanized layer
이와 같은 목적을 달성하기 위하여, 본 발명은 소둔 공정을 거친 강판소재를 조질압연공정에서 무늬가 새겨진 엠보스로울로 압하처리하므로써 엠보스무늬가 부여된 강판을 제조한 후 부식방지를 위해 연속용융도금라인에서 아연을 용융도금하여 제조하는 것을 요지로 한다.In order to achieve the above object, the present invention is a steel sheet material subjected to the annealing process by rolling the embossed roll engraved in the temper rolling process to produce a steel sheet given the embossed pattern by continuous molten plating to prevent corrosion The main idea is to manufacture zinc by hot-dip galvanizing.
본 발명은 종래의 전기도금라인과 전혀 다른 용융도금라인에서 강판표면에의 도금부착량 80g/㎡이상을 생산성 저하없이도 충분히 달성하므로써 특히, 내식성을 요구하는 전자제품, 냉동제품, 기타 제품용도에 사용할 수 있도록 하였으며, 이에 따라 엠보스무늬의 깊이가 30㎛이상 특히 50㎛이상 100㎛까지도 가능하게 되었다. 이러한 엠보스무늬의 깊이는 깊을수록 선명한 무늬형태를 제공한다.The present invention can be used for electronic products, frozen products, and other products that require corrosion resistance by sufficiently achieving 80 g / m 2 or more of plating adhesion amount on the surface of steel sheet in the hot-dip galvanizing line which is completely different from the conventional electroplating line. As a result, the embossed pattern has a depth of 30 μm or more, in particular 50 μm or more and 100 μm. The deeper the embossed pattern provides a clearer pattern.
이와같이 강판표면의 도금부착두께 80g/㎡이상, 엠보스무늬 깊이 50㎛이상의 제조는 종래의 전기도금라인에서는 생산성의 현저한 저하와 품질상의 문제점 발생 없이는 실질적으로 불가능에 가까운 것이다. 종래의 전기도금라인(EGL)에서 상기엠보스무늬 깊이를 깊게하여 연속도금작업을 행한다면 이는 작업속도상의 저하는 말할 것도 없고, 나아가 엠보스무늬가 각인된 부위의 도금부착상태를 볼 때 특히 가장자리 부위에서 불균일성을 일으키기 쉽고 도금박리현상과 밀착성 저하를 가져오기 쉽다.As described above, the production of the plated coating thickness of 80 g / m 2 or more and the embossed pattern depth of 50 μm or more is substantially impossible in the conventional electroplating line without a significant decrease in productivity and quality problems. In the conventional electroplating line (EGL), if the depth of the embossed pattern is carried out in a continuous plating operation, not to mention a decrease in the working speed, and furthermore, especially when looking at the adhesion state of the part where the embossed pattern is engraved It is easy to cause nonuniformity at the site, and it is easy to bring about plating peeling and deterioration of adhesion.
본 발명은 용융도금법으로는 엠보스무늬 도금강판제조가 실질적으로 불가능하다고 여겨져온 기술상의 문제점을 여러므로 연구끝에 극복하였을뿐아니라 생산성 또한 일반 강판도금에 비하여 조금도 저하됨 없이 나아가 종래의 전기도금법에서 실현하지 못하였던 상술한 두꺼운 도금피복, 깊은 엠보스무늬에의한 선명하고 미려한 엠보스강판의 제조까지도 가능하게한 것이다.The present invention overcomes the technical problems that have been considered to be practically impossible to manufacture embossed plated steel sheet by the hot-dip plating method, and has not only been overcome at the end of the study. It was possible to manufacture the above-described thick plated coating, a clear and beautiful embossed steel sheet by the deep embossed pattern.
또한, 본 발명은 상기 엠보스 용융아연도금강판을 차기공정인 연속도장라인에서 탈지처리하고 도료의 밀착성 향상을 위하여 크로메이트피막처리 후에 프라이머 도장 및 상도 도장을 행하여 칼라강판을 제조할 수 있다.In addition, the present invention can decolorize the embossed hot-dip galvanized steel sheet in a continuous coating line which is the next step, and to produce a color steel sheet by performing a primer coating and a top coat after chromate coating treatment to improve the adhesion of the paint.
이하 본 발명상의 엠보싱공정을 상세히 설명한다.Hereinafter, the embossing process of the present invention will be described in detail.
본 발명에 따른 엠보스 용융아연도금강판은 연속소둔 열처리(CAL)를 시행한 냉간압연강판을 조질압연공정에서 조질압연로울중에서 상단 또는 하단의 하나의 워크로울(Work roll)을 엠보스로울로 준비하여 조질압연작업을 행하므로써 엠보스무늬를 부여한 소재 강판을 제조한다. 그리고 연속용융도금라인에서 공지의 용융도금처리공정인 표면오염물질 제거를 위한 전처리공정 및 강판의 기계적 물성 조절을 위한 열처리 공정, 아연용융도금욕조내로 강판을 통과시켜 에어와이핑법(Air wiping)으로 도금부착량을 조절하는 공정과 광택도 필요유무에 따라 조질압연, 텐션레벨링(Tension levelling) 및 오일링 처리를 실시하는 후처리공정을 거쳐 본 발명의 제품이 완성된다.The embossed hot-dip galvanized steel sheet according to the present invention is a cold rolled steel sheet subjected to continuous annealing heat treatment (CAL) to prepare one work roll (Work roll) of the top or bottom in the temper rolling roll in the temper rolling process to emboss roll By temper rolling to produce a steel sheet with embossed pattern. In the continuous hot dip plating line, a pretreatment process for removing surface contaminants, a known hot dip plating process, a heat treatment process for adjusting mechanical properties of the steel sheet, and a steel wiping method through the steel sheet through a zinc hot dip plating bath. The product of the present invention is completed through a post-treatment step of performing temper rolling, tension leveling, and oiling treatment depending on the process of adjusting the amount of adhesion and the degree of glossiness.
상기 광택도를 가지게할 것이냐 아니면 무광처리할 것이냐 하는 것은 종래 불가능하였고(전기도금법에 의한 엠보스강판에는 광택도 없음) 본 발명에서만 가능한 것이다. 상기 소재 강판에 조질압연공정에서 부여되는 무늬 깊이가 30 ~ 100㎛ 범위가 되도록하고, 바람직하기로는 50 ~ 80㎛ 이나 그러한 범위에 한정되는 것은 아니다. 또한 도금처리공정에서 에어와이핑법으로 조절되는 도금부착량은 단면기준으로 본 발명에서는 40 ~ 150g/m2이 되도록하고, 특히 그 중에서도 80 ~ 150g/m2이 바람직하다.Whether to have the glossiness or to be matte has not been possible in the past (no gloss on the embossed steel sheet by the electroplating method) is possible only in the present invention. The depth of the pattern given to the raw material steel sheet in the temper rolling process is in the range of 30 to 100 µm, preferably 50 to 80 µm, but is not limited to such a range. In addition, the plating deposition amount controlled by the air wiping method in the plating treatment step is 40 to 150g / m 2 in the present invention on the basis of the cross section, in particular 80 to 150g / m 2 is preferred.
이하, 상술한 수치한정 이유 등에 대하여 설명한다.The reason for numerical limitation described above will be described below.
조질압연공정에서 소재강판에 부여되는 엠보스무늬는 엠보스로울에 부여된 무늬 자체 깊이나 조질압연공정에서의 압하력 조절에 의해 조절 가능하다. 그러나 엠보스무늬의 깊이가 30㎛ 미만으로 되면 용융도금에 의한 아연도금과 도장처리시에 아연도금 및 도료에 의해 엠보스 무늬가 채워져 용융도금에 의한 아연도금 및 도장처리 후에 입체감 있는 미려한 무늬를 얻을 수 없다. 또한 100㎛ 초과 되면 용융도금시 엠보스무늬에서의 도금부착량이 많아 용융아연도금 및 도장처리 후에 무늬깊이 증가에 따른 입체감 효과의 차이가 거의 없어 소재강판에 부여되는 엠보스무늬의 깊이를 가급적 30 ~ 100㎛ 범위로 제한하는 것이 바람직하다.The embossed pattern applied to the material steel sheet in the temper rolling process can be controlled by adjusting the depth of the pattern itself given to the embossing roll or the reduction in the rolling force in the temper rolling process. However, if the depth of embossed pattern is less than 30㎛, the embossed pattern is filled by zinc plating and paint during hot dip galvanizing and coating process to obtain three-dimensional beautiful pattern after zinc plating and hot dip coating by hot dip plating. Can't. In addition, if the thickness exceeds 100㎛, the amount of plating adhesion in the embossed pattern during hot dip plating has little difference in the three-dimensional effect due to the increase in the depth of the pattern after hot dip galvanizing and coating treatment. It is preferable to limit it to 100 micrometers.
또한 도금부착량의 경우 용융아연도금에서 단면기준으로 조절 가능한 최소도금부착량인 40g/m2이상 150g/m2미만으로 제한하는 것이 바람직하다.In addition, in the case of plating deposition, it is preferable to limit the minimum plating deposition amount that can be adjusted on a cross-sectional basis in hot dip galvanizing to 40 g / m 2 or more and less than 150 g / m 2 .
통상적으로 아연도금부착량 증가에 따라서 내식성이 증가하므로 본 발명에서는 용도에 따라 에어와이핑법으로 도금부착량을 상기범위내에서 조절하나 도금부착량이 150g/m2이상이 되면 용융도금 후에 입체감있는 미려한 무늬를 얻을 수 없다. 도금부착량이 특히 80~150g/㎡ 되어야할 내식성을 요구하는 엠보스강판으로서는 본 발명상의 용융아연도금강판이 가장 적합하다할 것이다.In general, the corrosion resistance is increased according to the increase in the amount of zinc plating, but according to the present invention, the coating amount is controlled by the air wiping method within the above range, but when the plating amount is 150 g / m 2 or more, a beautiful pattern having a three-dimensional effect is obtained after the hot dip plating. Can't. The hot dip galvanized steel sheet according to the present invention will be most suitable as an embossed steel sheet which requires corrosion resistance, which should be 80 to 150 g / m 2, in particular.
본 발명에 의한 용융도금강판과 종래의 전기도금강판과의 차이를 보면 무늬각인되어 도금이될 소재원판(11)의 구석(홈)부가 엠보스압연으로 그 가장자리 구석부(도 2의 부호 12)가 예리한 각도를 형성하게 되고, 이 구석부(홈부) 위로 아연도금층이 형성되는바, 종래의 전기도금의 경우 이 구석부를 따라 도금되므로 소재원판의 각도와 도금층의 각도가 동일한 각도를 그대로 유지하나, 본 발명상의 용융아연도금의 경우에는 도금시 그 도금층 각도를 둔화시켜 도금되므로, 전기도금의 경우 이 모서리도금층에서 발생할 수 있는 문제점이 특히 다음의 도장공정에 투입될 때 모서리부에서 기포, 도막크랙 등의 문제가 발생되는데 반해, 본 발명상의 경우에는 그러한 크랙 등 문제발생이 거의 발견되지 않는다.Looking at the difference between the hot-dip galvanized steel sheet according to the present invention and the conventional electroplated steel sheet, the corner (groove) portion of the material disc 11 to be plated by the pattern is embossed rolling the edge corner portion (symbol 12 in Fig. 2) Is to form a sharp angle, the galvanized layer is formed over the corner (groove), the conventional electroplating is plated along this corner, so the angle of the raw material and the plating layer maintain the same angle, In the case of hot-dip galvanizing according to the present invention, the plating layer is plated with a slanted angle at the time of plating. Thus, in the case of electroplating, the problem that may occur in the corner plating layer is a bubble, a coating film crack, etc. On the other hand, in the case of the present invention, problems such as cracks are rarely found.
또한 상기의 엠보스 용융아연도금강판을 소재로 사용하여 통상의 연속도장라인에서 PCM(Pre-Coated Metal) 도장처리를 하여 칼라강판의 제조가 가능하다. 이 경우 표면의 이물질 제거를 위해 탈지처리를 실시한 후, 20 ~ 80mg/m2의 크로메이트처리, 건조 후에 프라이머도장 및 상도도장의 도장처리를 실시하고, 이때 사용한 도료는 일반적으로 칼라강판에서 사용되는 도료를 사용하여 도장처리를 실시한다.In addition, by using the embossed hot-dip galvanized steel sheet as a material it is possible to manufacture a color steel sheet by PCM (Pre-Coated Metal) coating treatment in a normal continuous coating line. In this case, degreasing treatment is performed to remove foreign substances from the surface, followed by chromate treatment of 20 to 80 mg / m 2 and drying and coating of primer coating and top coat, and the coating used is generally paint used in color steel sheet. The paint treatment is carried out using.
이하, 실시예를 통하여 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
특성평가는 육안에 의한 엠보스 무늬의 입체감 평가, 절곡시험에 의한 가공성 및 염수분무시험에 의한 내식성을 비교평가 하였다.The evaluation of the characteristics was carried out to evaluate the three-dimensional effect of the embossed pattern with the naked eye, the workability by the bending test and the corrosion resistance by the salt spray test.
실시예Example
(실시예 1)(Example 1)
냉간압연된 풀 하드(Full Hard) 강판을 연속소둔공정(CAL)을 거쳐 요구에 맞는 재질특성을 갖도록 열처리한 후 조질압연공정에서 4하이1스탠드(4-High 1-stand) 조질압연로울중에서 상단로울을 엠보스로울로 하여 200톤 압하력으로 조질압연작업을 행하여 80㎛ 깊이의 엠보스무늬를 부여한 0.5mm 두께의 소재 강판을 제조한 후, 연속용융도금라인에서 오염물질 제거를 위해 탈지하고, 760℃에서 소둔열처리 하였다. 다음 460℃ 용융아연도금욕에서 아연도금처리하였다.이 때 아연도금 공정에서 에어와이핑법으로 도금부착량이 단면기준 50g/m2가 되도록 조절하였다. 그 결과 입체감이 풍부한 엠보스 무늬를 가진 본 발명상의 엠보스 용융아연도금강판을 얻을 수 있었다.(도 1, 도 2 참조)The cold rolled full hard steel sheet is heat-treated to have a material characteristic that meets the requirements through a continuous annealing process (CAL), and then the upper end of the 4-high 1-stand tempered roll in the temper rolling process. The roll is embossed roll to perform the temper rolling work at 200 ton pressing force to make 0.5mm thick steel sheet with emboss pattern of 80㎛ depth, and then degreasing to remove contaminants from the continuous hot dip plating line. Annealing heat treatment at 760 ℃. Next, zinc plating was performed in a hot dip galvanizing bath at 460 ° C. At this time, the coating weight was adjusted to 50 g / m 2 based on the cross section by air wiping in the zinc plating process. As a result, an embossed hot-dip galvanized steel sheet of the present invention having an embossed pattern rich in three-dimensional feeling could be obtained. (See FIGS. 1 and 2)
상기의 엠보스 용융아연도금강판을 소재로 사용하여 통상의 연속도장라인에서 표면의 이물질 제거를 위해 탈지처리를 실시한 후, 50mg/m2의 크로메이트처리를 실시하고 고분자 폴리에스터 프라이머를 8㎛ 두께로 도장한 후 PMT(Peak MetalTemperature) 205℃ 로 가열, 건조시키고, 고분자 폴리에스터 상도도료를 15㎛ 두께로 도장한 후 PMT(Peak Metal Temperature) 230℃ 로 가열, 건조시켜 전체 도막두께 36㎛ 의 칼라강판을 제조하였다.Using the embossed hot-dip galvanized steel sheet as a material, degreasing treatment was performed to remove foreign substances on the surface in a normal continuous coating line, followed by chromate treatment of 50 mg / m 2 , and a polymer polyester primer having a thickness of 8 μm. After coating, it is heated and dried at PMT (Peak MetalTemperature) 205 ℃ and coated with high polymer polyester topcoat to 15㎛ thickness, then it is heated and dried at PMT (Peak Metal Temperature) 230 ℃ and colored steel sheet with total thickness of 36㎛ Was prepared.
(비교예 1)(Comparative Example 1)
실시예 1 에서 엠보스 용융아연도금강판 대신 용융아연도금 없이 엠보스무늬 처리된 강판을 소재로 사용하여 연속도장라인에서 전체 도막두께 36㎛ 의 칼라강판을 제조하였다.In Example 1, an embossed steel plate without hot dip galvanizing was used as a material instead of an embossed hot dip galvanized steel sheet to prepare a color steel sheet having a total coating thickness of 36 μm in a continuous coating line.
상기와 같이 실시된 예의 결과를 표 1 에 나타내었다.Table 1 shows the results of the examples carried out as described above.
표 1.Table 1.
상기의 실험결과에서 알 수 있듯이 본 발명에 의한 엠보스 용융아연도금강판및 이를 이용한 칼라강판은 그 엠보스무늬홈 깊이가 30㎛이상, 특히 50㎛이상 형성가능하게되므로써 입체감 있는 미려한 외관을 얻을 수 있는데다 도금부착량 40g/㎡이상 가능하여 우수한 내식성을 갖게 되고, 가전제품, 외장케이스(case) 또는 건축외장재와 같은 미려한 외관과 높은 내식성을 요구하는 용도에 사용형태가 가능하여 용도 제한없이 적용 가능하다.As can be seen from the above experimental results, the embossed hot-dip galvanized steel sheet according to the present invention and the color steel sheet using the same can obtain an embossed pattern groove depth of 30 μm or more, particularly 50 μm or more, thereby obtaining a beautiful three-dimensional appearance. In addition, the plating adhesion amount is more than 40g / ㎡ is possible to have excellent corrosion resistance, it is possible to use in applications requiring beautiful appearance and high corrosion resistance, such as home appliances, exterior cases (building) or building exterior materials can be applied without any use restrictions.
본 발명상의 엠보싱공정처리에 따라, 특히 종래 전기아연도금라인에서 행하던 전기청정라인(ECL)상의 공정을 생략할 수 있게 되어 생산성향상은 물론 별도의 탈지처리에 따른 제반 품질저하, 공정상의 낭비를 제거할 수 있게 되었다.According to the embossing process treatment of the present invention, it is possible to omit the process on the electro-cleaning line (ECL), which was performed in the conventional electro-galvanizing line in particular, thereby improving productivity and eliminating all wastes of quality and process waste due to separate degreasing treatment. I can do it.
아울러, 용융도금 후의 광택을 거의 그대로 유지할 수 있어 전기도금강판의 경우와 달리 용융도금강판 자체를 오일이나 칼라도료 도장함이 없이도 외장용으로도 사용가능한 고광택 유지는 물론, 도장용으로 사용하고저할 때에는 조질압연에서 스킨패스(skin-pass)처리하여 도장밀착성 및 평활성을 향상시킬 수 있다.In addition, the gloss after the hot dip plating can be maintained almost as it is, unlike the case of the electroplated steel sheet, the hot dip coated steel sheet itself can be used for exterior use without coating oil or color paint, as well as for painting. Skin pass treatment in temper rolling can improve paint adhesion and smoothness.
아울러, 엠보스압연상태에서는 엠보스무늬 각인부에 해당되는 골(홈)은 예리한 각도를 형성하게되는데 전기도금(EG)의 경우에는 원판의 각도와 동일한 각을 도금 후 그대로 유지하게 되나 도 3(A) 본 발명의 경우에는 구석부(홈)에 도금시 각도를 둔화시켜 주게되므로 도 3(B) 모서리에서 발생할 수 있는 종래 엠보스강판 도장시의 기포, 도막크랙 도장 후의 내식성 저하 등의 제문제를 감소시키거나 제거할 수 있었다.In addition, in the embossed rolling state, the groove (groove) corresponding to the embossed pattern is formed at a sharp angle. In the case of electroplating (EG), the same angle as that of the original plate is maintained after plating. A) In the case of the present invention, since the angle at the time of plating on the corners (grooves) is slowed down, problems such as deterioration of corrosion resistance after coating of conventional embossed steel sheets and coating film cracks, which may occur at the corners of FIG. 3 (B). Could reduce or remove.
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| KR100668174B1 (en) * | 2004-11-05 | 2007-01-11 | 유니온스틸 주식회사 | Embossed steel sheet coated with Zn-Al alloy by hot-dip galvanization, and process of manufacture thereof |
| KR100700379B1 (en) * | 2005-09-01 | 2007-03-27 | 유니온스틸 주식회사 | A Method for Preparing Colored Steel Sheet with Single Side Embossed |
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| JPS6213201A (en) * | 1985-07-10 | 1987-01-22 | Nisshin Steel Co Ltd | Production of galvanized and embossed steel sheet |
| JPH01263253A (en) * | 1988-04-15 | 1989-10-19 | Nippon Mining Co Ltd | Production of hot dip galvanized product with embossed figure |
| JPH03207504A (en) * | 1990-01-10 | 1991-09-10 | Nkk Corp | Steel sheet excellent in brightness of reflectivity for coating and press workability and manufacture thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100668174B1 (en) * | 2004-11-05 | 2007-01-11 | 유니온스틸 주식회사 | Embossed steel sheet coated with Zn-Al alloy by hot-dip galvanization, and process of manufacture thereof |
| KR100700379B1 (en) * | 2005-09-01 | 2007-03-27 | 유니온스틸 주식회사 | A Method for Preparing Colored Steel Sheet with Single Side Embossed |
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