KR100668174B1 - Embossed steel sheet coated with Zn-Al alloy by hot-dip galvanization, and process of manufacture thereof - Google Patents
Embossed steel sheet coated with Zn-Al alloy by hot-dip galvanization, and process of manufacture thereof Download PDFInfo
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- KR100668174B1 KR100668174B1 KR1020040089571A KR20040089571A KR100668174B1 KR 100668174 B1 KR100668174 B1 KR 100668174B1 KR 1020040089571 A KR1020040089571 A KR 1020040089571A KR 20040089571 A KR20040089571 A KR 20040089571A KR 100668174 B1 KR100668174 B1 KR 100668174B1
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- steel sheet
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 72
- 239000010959 steel Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 5
- 239000000956 alloy Substances 0.000 title claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- 229910007570 Zn-Al Inorganic materials 0.000 title 1
- 238000007747 plating Methods 0.000 claims abstract description 63
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 21
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims abstract description 4
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims abstract description 4
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 13
- 230000003666 anti-fingerprint Effects 0.000 claims description 4
- 238000004049 embossing Methods 0.000 abstract description 26
- 230000007797 corrosion Effects 0.000 abstract description 19
- 238000005260 corrosion Methods 0.000 abstract description 19
- 238000000576 coating method Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 11
- 238000003672 processing method Methods 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 13
- 239000010410 layer Substances 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 9
- 229910052725 zinc Inorganic materials 0.000 description 9
- 239000011701 zinc Substances 0.000 description 9
- 230000008021 deposition Effects 0.000 description 7
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 238000000137 annealing Methods 0.000 description 5
- 238000009713 electroplating Methods 0.000 description 5
- 229910001297 Zn alloy Inorganic materials 0.000 description 4
- 239000010960 cold rolled steel Substances 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 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
- C23C2/003—Apparatus
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- 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
- C23C2/04—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
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
본 발명은 아연-55%알루미늄 합금이 용융도금된 편면 엠보스 강판 및 그 제조방법에 관한 것이다.The present invention relates to a single-sided embossed steel sheet hot-dip galvanized zinc-55% aluminum alloy and a method of manufacturing the same.
본 발명에 의하면, 강판의 편면에 엠보스를 형성시키되, 엠보스 깊이가 50~100㎛, 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도가 20~60도 범위이고, 용융도금방식에 의한 아연-55%알루미늄 합금의 도금 부착량이 50~100g/m2 인 것을 특징으로 하는 아연-알루미늄 합금이 용융도금된 엠보스 강판 및 이와같은 엠보스 강판의 제조방법이 제공된다.According to the present invention, the emboss is formed on one side of the steel sheet, the emboss depth is 50 ~ 100㎛, the angle between the inclined surface of the emboss and the extension line of the flat portion (bottom) ranges from 20 to 60 degrees, hot-dip plating method There is provided an embossed steel sheet which is hot-plated with zinc-aluminum alloy, characterized in that the plating adhesion amount of zinc-55% aluminum alloy is 50 to 100 g / m 2 .
이때, 강판 편면에 엠보스를 형성시키는 엠보싱 롤은 레이저 가공방법에 의해 가공된다.At this time, the embossing roll which forms embossing on the single side | surface of a steel plate is processed by the laser processing method.
본 발명에 따른 엠보스 강판은 내식성이 우수하여 도금상태 그대로 사용이 가능해 짐으로써, 종래의 엠보스 강판과 달리 별도의 도장처리없이 건자재 및 가전소재 분야에 적용될 수 있다.The embossed steel sheet according to the present invention is excellent in corrosion resistance, so that it can be used as it is, and thus can be applied to dry materials and home appliance materials without a separate coating process, unlike the conventional embossed steel sheet.
편면 엠보스 강판,아연-55%알루미늄 합금,용융도금,레이저 가공방법Single sided embossed steel sheet, zinc-55% aluminum alloy, hot dip plating, laser processing method
Description
도 1은 공지방식에 의해 형성되는 엠보스 형태의 개략도.1 is a schematic view of an embossed form formed by a known method.
도 2는 본 발명에 따른 엠보스 강판에 형성된 엠보스 형태의 현미경 사진.Figure 2 is a micrograph of the embossed form formed on an embossed steel sheet according to the present invention.
도 3은 본 발명에 따른 엠보스 강판 및 엠보스 처리되지 않은 강판의 표면상태를 보여주는 현미경 사진.Figure 3 is a micrograph showing the surface state of the embossed steel sheet and the unembossed steel sheet according to the present invention.
본 발명은 엠보스 강판 및 그 제조방법, 특히 아연-55%알루미늄 합금(갈바륨)이 용융도금된 편면 엠보스 강판 및 그 제조방법에 관한 것이다.The present invention relates to an embossed steel sheet and a method for manufacturing the same, in particular, a single-sided embossed steel sheet hot-plated with zinc-55% aluminum alloy (galvalume).
강판은 자연상태에서 그대로 방치할 경우, 부식환경에 의해서 수명이 급격하게 감소한다. 이러한 강판의 수명을 연장하는 방법으로 도금을 실시하는 방법과 도장을 실시하는 방법이 있다. 강판상에 도금되는 재료로는 아연,아연 합금, 알루미 늄, 알루미늄 합금등이 널리 사용되고 있으며, 이들이 피복된 강판은 내식성과 미려한 외관이 요구되는 건축내·외장재, 가전제품등의 소재로 널리 이용되고 있다. 또한, 강판상에 각종의 페인트를 도장한 칼라도장강판이 제품의 고급화와 기능성이 요구되는 부분에 적용되고 있다.When the steel sheet is left in its natural state, its life is drastically reduced due to the corrosive environment. As a method of extending the life of such a steel plate, there are a method of plating and a method of coating. Zinc, zinc alloy, aluminum, aluminum alloy, etc. are widely used as the material to be plated on the steel sheet, and the coated steel sheets are widely used as materials for building interior and exterior materials and home appliances requiring corrosion resistance and beautiful appearance. have. In addition, color-coated steel sheets coated with various paints on steel sheets are applied to parts requiring high quality and functionality of products.
그런데, 수요가의 요구는 지속적으로 다양화,고급화되고 있다. 이런 수요가의 요구에 부응하여 적절한 기능성을 부여한 강판이 개발되어 실용화 되고 있으며, 엠보스 강판은 이런 강판중의 하나이다.However, the demand of demand is continuously diversified and advanced. In order to meet the demand of this demand, steel sheets have been developed and put into practical use, and emboss steel sheet is one of such steel sheets.
엠보스 강판은 양면이 엠보스를 갖는 경우와 편면만이 엠보스를 갖는 경우가 있으나, 건축재,가전제품등에는 거의 편면만이 엠보스를 갖는 편면 엠보스 강판이 사용되고 있다. 엠보스 강판의 제조방법은 크게 2가지로 나뉜다. 하나는,냉간 압연된 강판을 소둔하고, 조질압연 공정에서 무늬가 새겨진 엠보싱 롤을 이용하여 강판상에 엠보싱을 부여하고, 도금설비에서 도금을 실시하고,도장설비에서 페인트를 도포하여 엠보스 강판을 만드는 방법이다. 다른 하나는, 먼저 강판상에 도금 및 도장을 실시한 후에 엠보싱 롤로 압하처리 함으로써 엠보스 강판을 만드는 것이다.The embossed steel sheet may be embossed on both sides and only one side may be embossed. However, a single-sided embossed steel sheet having almost only one emboss is used for building materials and home appliances. The manufacturing method of the embossed steel sheet is largely divided into two. One is to anneal the cold rolled steel sheet, to give the embossing on the steel sheet using the embossed roll engraved in the temper rolling process, to perform plating in the plating equipment, and to apply paint in the coating equipment to form the embossed steel sheet. How to make The other is to make an embossed steel sheet by first plating and painting on the steel sheet and then pressing the sheet with a embossing roll.
한국 공개특허 제2004-00590호는 강판 표면에 엠보싱 패턴을 형성한 후 아연 또는 아연 합금계 전기도금을 행하여 엠보싱 강판을 제조하는 방법에 있어서,엠보싱 패턴이 평탄면과 골로 이루어지되 골의 깊이는 40~120㎛, 골의 거리는 평탄면에서 수직으로 0.5~5mm이고, 골의 옆벽과 평탄면의 수평선과 이루는 각이 61~85도이고, 도금량이 5~40 g/m2 인 것을 특징으로 하는 엠보싱 강판의 제조방법을 개시하고 있다. 또한 한국 공개특허 제2002-00904호는 조질압연공정에서 엠보싱 롤로 압하처리하여 30~100㎛ 깊이의 엠보스를 만들고, 아연도금 부착량이 단면기준으로 40~150g/m2 이 되도록 연속용융도금라인에서 아연을 용융도금한 뒤 스킨패스 처리에 따라 표면상태를 광택 또는 무광택으로 선택할 수 있도록 한 것을 특징으로 하는 용융아연도금강판을 개시하고 있다.Korean Patent Laid-Open Publication No. 2004-00590 discloses a method of manufacturing an embossed steel sheet by forming an embossed pattern on a surface of a steel sheet and then performing zinc or zinc alloy electroplating, wherein the embossed pattern is made of a flat surface and a valley, but the depth of the valley is 40. Embossing, characterized in that the distance of the groove is 0.5 to 5 mm perpendicular to the flat surface, the angle between the side wall of the valley and the horizontal line of the flat surface is 61 to 85 degrees, and the plating amount is 5 to 40 g / m 2 . Disclosed is a method for producing a steel sheet. In addition, Korean Patent Laid-Open Publication No. 2002-00904 uses an embossing roll in a temper rolling process to make embossing with a depth of 30 to 100 μm, and in the continuous hot dip plating line so that the amount of zinc plating is 40 to 150 g / m 2 based on the cross section. Disclosed is a hot-dip galvanized steel sheet, characterized in that the surface state can be selected as glossy or matte according to skin pass treatment after zinc is hot-plated.
한국 공개특허 제2004-00590호는 전기도금방법을 채택하여 도금량을 5~40 g/m2 으로 한정하고 있는 바, 이는 일반적으로 전기도금방법은 도금 밀착성이 비교적 우수하나, 도금량이 증가할수록 생산성 저하와 품질저하 문제가 커지기 때문이다. 또한 아연 합금계 도금에 대해서도 청구하고 있으나, 구체적인 실시예는 아연도금한 경우만 기재하고 있을 뿐이다. 이에 대해 한국 공개특허 제2002-00904호는 연속용융도금라인을 채택하여 아연도금 부착량을 증가시키고 있다.Korean Patent Laid-Open Publication No. 2004-00590 limits the plating amount to 5 to 40 g / m 2 by adopting an electroplating method. In general, the electroplating method has a relatively good plating adhesion, but the productivity decreases as the plating amount increases. This is because the problem of quality deterioration increases. In addition, while claiming for zinc alloy-based plating, specific examples are only described in the case of zinc plating. On the other hand, Korean Patent Laid-Open Publication No. 2002-00904 adopts a continuous hot dip plating line to increase the amount of zinc plating.
엠보스 강판에 도금소재로 아연 합금계, 특히 아연-55%알루미늄 합금(갈바륨)을 사용하는 경우, 아연을 도금하는 경우에 비해 내식성이 우수할 뿐만 아니라, 외관이 미려해지는 장점을 가지나, 용융도금방법을 사용하여 아연-55%알루미늄 합금을 도금한 엠보스 강판에 대한 기술은 아직 개발되어 있지 않다.In the case of using zinc alloy, especially zinc-55% aluminum alloy (galvalume) as the plating material for the embossed steel sheet, not only has excellent corrosion resistance compared to zinc plating, but also has a beautiful appearance, but hot dip plating No technique has yet been developed for an embossed steel sheet plated with zinc-55% aluminum alloy using the method.
본 발명의 목적은 용융도금방법을 사용하여 아연-55%알루미늄 합금을 도금함으로써 기존의 아연도금에 비해서 내식성이 우수하고 외관이 미려할 뿐만아니라, 엠보스 질감이 우수한 엠보스 강판과 그 제조방법을 제공하는 것이다. An object of the present invention is to use a hot-dip plating method to plate the zinc-55% aluminum alloy, not only excellent corrosion resistance and beautiful appearance compared to conventional zinc plating, but also embossed steel sheet excellent in emboss texture and its manufacturing method To provide.
상기 목적을 달성하기 위해, 본 발명은 강판의 편면에 엠보스를 형성시키되,엠보스 깊이가 50~100㎛, 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도가 20~60도 범위이고, 용융도금방식에 의한 아연-55%알루미늄 합금의 도금 부착량이 50~100g/m2 인 것을 특징으로 하는 아연-알루미늄 합금이 용융도금된 엠보스 강판을 제공한다.In order to achieve the above object, the present invention is to form an embossed on one side of the steel sheet, the embossing depth is 50 ~ 100㎛, the angle formed by the extension line of the inclined surface and the flat portion (bottom) of the emboss range 20 ~ 60 degrees The present invention provides an embossed steel sheet in which a zinc-aluminum alloy is hot-plated, characterized in that the plating adhesion of the zinc-55% aluminum alloy is 50 to 100 g / m 2 by the hot dip plating method.
또한, 본 발명에 따르면, 냉간압연 강판을 소둔하는 단계; 상·하단중 어느 하나의 롤에 일정한 무늬가 형성된 엠보싱 롤을 사용하여 조질압연 함으로써 강판의 편면에 엠보스를 형성시키는 단계;및 엠보싱된 강판 표면을 도금하는 단계로 구성되되, 엠보스를 형성시키는 단계에서 엠보스 깊이가 50~100㎛이고 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도가 20~60도 범위가 되도록 엠보스를 형성시키며, 강판표면을 도금하는 단계에서 도금 부착량이 50~100g/m2 가 되도록 아연-55%알루미늄 합금을 용융도금 하는 것을 특징으로 하는 아연-알루미늄 합금이 용융도금된 엠보스 강판의 제조방법을 제공한다.In addition, according to the invention, the step of annealing the cold rolled steel sheet; Forming an emboss on one side of the steel sheet by temper rolling using an embossing roll having a predetermined pattern formed on one of the upper and lower rolls; and plating the surface of the embossed steel sheet, thereby forming embossing. Emboss depth is 50 ~ 100㎛ in the step and the embossing is formed so that the angle between the inclined surface of the emboss and the extension line of the flat portion (bottom) ranges from 20 to 60 degrees, the amount of plating adhesion in the step of plating the steel surface It provides a method for producing a zinc-aluminum alloy hot-dip galvanized embossed steel sheet characterized in that the zinc-55% aluminum alloy is hot-plated to 50 ~ 100g / m 2 .
상기 엠보스 롤은 레이저 가공방법에 의해 일정한 무늬가 형성된 롤을 사용하는 것이 보다 바람직하다.As for the said embossing roll, it is more preferable to use the roll in which the constant pattern was formed by the laser processing method.
강판 표면을 도금하는 단계 후에 크로메이트 처리하는 단계 또는 크로메이트 처리한 후 내지문 수지처리 하는 단계가 더욱 추가되는 것이 보다 바람직하다.It is more preferred that the step of chromate treatment after the step of plating the steel plate surface or the step of rubbing resin treatment after chromate treatment is further added.
이하에서는 본 발명에 대해 보다 자세히 설명한다.Hereinafter, the present invention will be described in more detail.
통상적으로 엠보스는 평탄면상에 압입된 요부(凹部)를 갖는 형태로서 이러한 형태가 연속되는 패턴을 갖는다. 이때 요부는 서로 연결되지 않고 독립적으로 존재한다. Usually, the embossing has a recessed portion pressed on a flat surface and has a pattern in which this form is continuous. In this case, the main parts are not connected to each other and exist independently.
도 1은 전기도금방법을 채택하여 도금량을 5~40 g/m2 으로 한정하고 있는 한국 공개특허 제2004-00590호에서 사용되는 엠보스의 형태의 개략도로서, 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도(θ)가 61~85도이다.1 is a schematic view of the shape of the emboss used in Korean Patent Laid-Open Publication No. 2004-00590, which limits the plating amount to 5 to 40 g / m 2 by adopting an electroplating method, wherein an inclined surface and a flat portion (bottom) of the emboss The angle (theta) of the extension line of () is 61-85 degrees.
본 발명자들은 용융도금방법에 의한 아연-55%알루미늄 합금을 도금한 엠보스 강판의 제조에 대한 연구와 실험을 수행하면서, 상기 각도가 60도를 넘는 경우 엠보스의 경사면과 평탄부의 수평면이 만나는 모서리 부위에서 도금 부착성이 불량하고, 가공시 이 부위에서 도막층의 크랙이 발생하는등 문제점이 발생하였으나, 상기 각도를 20~60도 범위로 한정하면, 이같은 문제점이 발생하지 않는 것을 발견하여 본 발명에 이르게 된 것이다. 뿐만아니라 상기 각도 범위에서는 전기도금방법에서는 달성하기 어려운, 높은 도금 부착량으로 도금하는 것이 가능하여 우수한 내식성을 얻을 수 있고 미려한 외관과 양호한 엠보스 질감을 갖는 엠보스 강판이 형성됨을 발견하게 되었다.The present inventors conducted research and experiment on the production of embossed steel sheet plated with zinc-55% aluminum alloy by the hot-dip plating method, and the corner where the inclined surface of the embossed surface and the horizontal surface of the flat part meet when the angle exceeds 60 degrees. Problems such as poor plating adhesion at the site, cracking of the coating layer at this site during processing, but when the angle is limited to the range of 20 to 60 degrees, such a problem does not occur, the present invention was found It came to. In addition, in the above angular range, it was found that it is possible to plate with a high coating weight, which is difficult to achieve in the electroplating method, thereby obtaining excellent corrosion resistance and forming an embossed steel sheet having a beautiful appearance and a good embossed texture.
즉, 본 발명은 강판의 편면에 엠보스를 형성시키되, 엠보스 깊이가 50~100㎛, 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도가 20~60도 범위이고, 용융도금방식에 의한 아연-55%알루미늄 합금의 도금 부착량이 50~100g/m2 인 것을 그 기술적 요지로 한다.That is, in the present invention, the emboss is formed on one side of the steel sheet, the emboss depth is 50 ~ 100㎛, the angle formed by the extension line of the inclined surface and the flat portion (bottom) of the emboss is 20 ~ 60 degrees, hot-dip plating method It is the technical point that plating adhesion amount of zinc-55% aluminum alloy by is 50-100 g / m <2> .
본 발명의 경우, 엠보스 깊이를 50~100㎛ 범위로 한정하였다.이는 엠보스의 깊이가 50㎛ 보다 작아지면,용융도금되는 도금층에 의해서 엠보스 부위가 평탄부보다 오히려 두껍게 형성됨으로써 엠보스 무늬의 질감이 형성되지 않으며, 또한 엠보스 깊이가 100㎛를 넘으면,엠보스 내의 도금부착량이 과도해져서 제조원가의 상승을 초래하고, 도금후 도포되는 크로메이트층 및/또는 수지층의 밀착성이 엠보스 형성부위에서 감소하여 흑변 및 백청이 조기에 발생함으로써 오히려 내식성이 감소하는 문제점이 발생하기 때문이다.In the case of the present invention, the emboss depth was limited to the range of 50 to 100 μm. When the emboss depth is smaller than 50 μm, the embossed portion is formed thicker than the flat part by the plating layer to be melt-plated, so that the emboss pattern If the texture of is not formed and the emboss depth is more than 100 µm, the amount of plating deposition in the embossing becomes excessive, leading to an increase in manufacturing cost, and the adhesion of the chromate layer and / or resin layer applied after plating is embossed. This is because the decrease in the black side and white blue occurs early to cause a problem of reduced corrosion resistance.
본 발명에서는 아연-55%알루미늄 합금을 용융도금방식으로 도금하되, 그 부착량은 50~100g/m2 범위로 한정하였다. 도금부착량이 50g/m2보다 작아지면,도금부착량을 제어하는 에어 와이프(air-wipe)에 의한 산화 드로스(dross) 발생이 도금욕 상부에서 과도하게 형성됨으로써 도금면의 외관불량 및 경제성을 저해한다. 도금부착량이 100g/m2을 넘으면,내식성은 증가하나 엠보스 면에서의 도금성분 유동성이 떨어지고, 평탄부보다 도금층의 두께가 두꺼워져서 엠보스 질감을 형성하지 못할 뿐만 아니라 가공시 도막층에 크랙이 발생하여 내식성이 급격하게 감소하는 문제점이 발생한다. In the present invention, the zinc-55% aluminum alloy is plated by a hot-dip plating method, the adhesion amount is limited to 50 ~ 100g / m 2 range. When the plating deposition amount is less than 50g / m 2 , the generation of oxide dross due to air-wipe controlling the plating deposition is excessively formed on the upper part of the plating bath, thereby impairing the appearance defect and economic efficiency of the plating surface. do. If the coating weight is more than 100g / m 2 , the corrosion resistance is increased, but the plating component fluidity on the embossed surface is decreased, and the thickness of the plating layer is thicker than that of the flat part, so that the embossed texture cannot be formed and cracks are formed on the coating layer during processing. A problem occurs that the corrosion resistance sharply decreases.
또한 본 발명에서는 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도를 20~60도 범위로 한정하였다. 이 각도가 20도보다 작아지면, 용융도금후 엠보스 면이 평탄부보다 두껍게 됨으로써 엠보스 질감이 나타나지 않으며, 공정간의 롤 통과시 마찰 슬립(slip) 현상에 의한 표층부의 도막이 훼손되어 외관손상이 발생하게 된다. 한편, 이 각도가 60도를 넘게되면,엠보스의 경사면과 평탄부의 수평면이 만나는 모서리 부위에서 가공시 도금층에 크랙이 발생한다. In addition, in the present invention The angle formed by the inclined surface of the emboss and the extension line of the flat portion (bottom surface) was limited to the range of 20 to 60 degrees. If the angle is smaller than 20 degrees, the embossed surface becomes thicker than the flat part after hot dip plating, so that the embossed texture does not appear. Done. On the other hand, if the angle exceeds 60 degrees, cracks are generated in the plating layer during processing at the corner portion where the inclined surface of the emboss and the horizontal surface of the flat portion meet.
도 2는 본 발명에 따른, 아연-55%알루미늄 합금이 용융도금된 편면 엠보스 도금강판의 단면형상을 보여주는 현미경 사진으로, 이때 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도는 40도이다.Figure 2 is a micrograph showing the cross-sectional shape of a single-sided embossed steel plate hot-dip galvanized zinc-55% aluminum alloy according to the present invention, wherein the angle between the inclined surface of the embossed and the flat portion (bottom) is 40 degrees It is also.
이처럼 본 발명은 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도를 적절히 제어함으로써 엠보스 면내의 도금부착량 제어가 용이해지고, 모서리 부위에서의 도금부착성이 양호하게 되어 우수한 내식성을 갖게 한다는 점에서 종래의 기술과는 확연히 차별되는 특징을 갖고 있다.As such, the present invention facilitates control of the plating deposition amount in the emboss surface by appropriately controlling the angle between the inclined surface of the emboss and the extension line of the flat portion (bottom surface), and provides excellent corrosion resistance due to good plating adhesion at the corner portion. In this respect, it has a distinctive feature from the prior art.
엠보스 질감을 재현하기 위한 엠보스 롤 가공방법으로는 롤을 산에 부분적으로 침식하여 만드는 방법이 주로 사용되어 왔는데, 이러한 방법으로 가공된 롤을 사용하게 되면 엠보스의 경사면이 평탄부의 연장선과 거의 직각에 가까운 각도로 형성됨으로써 도금후 가공시 도막에 크랙이 발생하거나 엠보스내의 도금성분 유동성을 저해하게 되어 과부착화하는 요인으로 작용한다. 이같은 문제점을 피하기 위해 본 발명에서는 엠보스 롤 가공시 기존의 산 에칭방식이 아닌 레이저 가공방법을 적용함으로써,엠보스 경사면이 완만한 경사를 갖도록 하였다. The embossing roll processing method for reproducing the embossing texture has been mainly made by partially eroding the rolls in the mountains. When using the roll processed in this way, the inclined surface of the embossing is almost the extension line of the flat part. Since it is formed at an angle close to the right angle, cracks may occur in the coating film during the post-plating process, or the plating component fluidity in the embossing may be inhibited, thereby acting as a factor of overattaching. In order to avoid such a problem in the present invention by applying a laser processing method other than the conventional acid etching method when embossing roll, the embossed inclined surface to have a gentle slope.
보다 바람직하게는 아연-55%알루미늄 합금 도금층위에 크로메이트 층 또는 크로메이트 층과 내지문 수지층을 갖는 것이다.이러한 층들이 형성되면 엠보싱 강 판의 내식성 및 외관 특성이 현저히 향상된다.More preferably, it has a chromate layer or chromate layer and anti-fingerprint layer on the zinc-55% aluminum alloy plating layer. The formation of such layers significantly improves the corrosion resistance and appearance characteristics of the embossed steel sheet.
본 발명에 따른 엠보스 강판의 제조방법을 설명하면 다음과 같다.Referring to the manufacturing method of the embossed steel sheet according to the present invention.
먼저,소지 강판으로 사용될 냉간압연 강판을 소둔한다. 강판은 특별히 한정하지 않으나, 탄소함량이 낮은 저탄소강 내지는 극저탄소강판이 바람직하다. 이는 본 발명이 주로 건축 내,외장재 또는 가전소재 분야를 대상으로 하는 강판에 적용하기 위해 개발되었기 때문이다. 소둔은 연속소둔 또는 배치소둔 방식중 어느 것을사용하여도 무방하다. First, the cold rolled steel sheet to be used as the base steel sheet is annealed. The steel sheet is not particularly limited, but a low carbon steel or an ultra low carbon steel sheet having a low carbon content is preferable. This is because the present invention was mainly developed to be applied to steel sheet targeting the interior, exterior materials or home appliance materials. Annealing may use either continuous annealing or batch annealing.
소둔된 강판은 판재의 형상교정 설비인 조질압연공정에서 강판의 편면에 엠보스를 형성시킨다. 엠보스는 하단중 어느 하나의 롤에 일정한 무늬가 형성된 엠보싱 롤을 사용하여 조질압연 함으로써 강판의 편면에 엠보스를 형성시킨다.이때 사용되는 롤에는 위에서 언급한 바와 같이 레이저 가공방법에 의해 엠보스 깊이가 50~100㎛이고 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도가 20~60도 범위가 되는 엠보스가 강판에 형성되도록 일정한 패턴의 형상이 양각된다.The annealed steel sheet forms an emboss on one side of the steel sheet in the temper rolling process, which is a shape correction facility for sheet material. Embossing is used to form embossing on one side of the steel sheet by temper rolling using an embossing roll having a uniform pattern on one of the lower rolls. The rolls used in this case are embossed by laser processing as described above. The shape of a certain pattern is embossed so that the embossing which is 50-100 micrometers and the angle formed by the inclined surface of the embossed extension and the extension line of the flat part (bottom) is 20-60 degree | times is formed in a steel plate.
엠보싱된 강판 표면에는 공지의 용융도금설비에서 갈바륨으로 알려진 아연-55%알루미늄 합금성분을 사용하여 용융도금되며, 이때 도금 부착량은 50~100g/m2 가 되도록 도금된다. The surface of the embossed steel sheet is hot-plated using a zinc-55% aluminum alloy component known as galvalume in a known hot dip plating facility, and the plating adhesion amount is plated to 50 to 100 g / m 2 .
강판 표면을 도금한 후에는 크로메이트 처리 또는 크로메이트 처리한 후 내지문 수지처리 하는 것이 보다 바람직하다. 크로메이트 처리나 내지문 수지처리는 공지의 방식으로 처리된다.After plating the surface of the steel sheet, it is more preferable to carry out chromate treatment or chromate treatment, and then carry out rubbing resin treatment. The chromate treatment and the fingerprint resin treatment are treated in a known manner.
이하에서는 본 발명의 실시예를 설명한다.Hereinafter, embodiments of the present invention will be described.
아래의 표 1은 본 발명에따라 제조된 엠보싱 강판과 비교예의 강판에 대한 엠보스 질감,가공성 및 내식성(5% 흑변) 측정값의 결과를 표시한 것이다.Table 1 below shows the results of embossed texture, processability and corrosion resistance (5% black side) measured values for the embossed steel sheet prepared according to the present invention and the steel sheet of the comparative example.
[표 1] TABLE 1
◎ : 양호 △ : 보통 × ; 불량 (Double-circle): good (triangle | delta): normal ×; Bad
표 1에 있는 모든 실시예는 0.5mm 두께의 냉연강판을 연속소둔방식으로 열처리한 후,조질압연 공정에서 여러 엠보싱 롤을 사용하여 ,주어진 바와같이, 엠보스 깊이와 엠보스 각도(엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도)를 다양하게 변화시킨 다음, 연속용융도금설비에서 도금부착량 조절장치(에어 와이핑)로 도금부착량이 50~120g/m2 의 범위가 되도록 아연-55%알루미늄 합금을 용융도금하였다. All the examples in Table 1 are heat treated in a continuous annealing method of 0.5mm thick cold rolled steel sheet, and then using various embossing rolls in the temper rolling process, as given, emboss depth and emboss angle (inclined surface of emboss) And varying the angle of the extension line of the flat part (bottom face), and then use the coating weight adjusting device (air wiping) in the continuous molten plating equipment so that the coating weight is in the range of 50 to 120 g / m 2 . The aluminum alloy was hot dip plated.
한편, 비교예 10은 용융도금방법으로 아연-55%알루미늄 합금을 80g/m2 도금하였으나, 강판 표면에 엠보스를 형성시키지 않은 경우이다. On the other hand, in Comparative Example 10, the zinc-55% aluminum alloy is plated by 80 g / m 2 by the hot dip plating method, but the embossing is not formed on the steel sheet surface.
도3은 본 발명에 따른 엠보스를 형성시킨 강판과 엠보스 처리가 되지 않은 강판의 현미경 사진으로, 엠보스 처리가 된 경우 강판 표면이 미려하고 엠보스 질감도 양호함을 알 수 있다.Figure 3 is a micrograph of the steel sheet and the embossed non-embossed steel sheet according to the present invention, it can be seen that the embossed surface is beautiful and the embossed texture is also good.
모든 실시예는 롤 코팅방식으로 도포형 크롬산염을 강판 표면에 도포하여 PMT(peak metal temperature) 60-140℃의 온도조건에서 열풍으로 건조시켜 10~30mg/m2 부착량으로 크로메이트 층을 형성시켰으며, 일부의 실시예는 계속하여 크로메이트 처리후에 내지문 수지처리를 하여 수지층을 형성시켰다.All the examples were coated with a coated chromate on the surface of the steel sheet by a roll coating method and dried with hot air at a temperature of PMT (peak metal temperature) of 60-140 ° C. to form a chromate layer with a deposition amount of 10 to 30 mg / m 2 . In some examples, the resin layer was formed by performing anti-fingerprint treatment after the chromate treatment.
특성평가로서 엠보스 질감은 육안에 의한 강판 표면의 엠보스 무늬 질감을 관찰하여 결정하였으며, 가공성은 절곡시험에 의해 평가하였으며, 내식성(5% 흑변)은 5%,35℃ NaCl 용액중에서 초기 흑청발생시간을 측정한 것이다.The embossing texture was determined by observing the embossed texture of the steel plate surface by visual observation, and the workability was evaluated by the bending test, and the corrosion resistance (5% black side) was initially generated in 5%, 35 ℃ NaCl solution. It is a measure of time.
표 1에서 볼 수 있는 것처럼, 용융도금방식에 의한 아연-55%알루미늄 합금의 도금 부착량이 50~100g/m2 범위 내에 있어도 엠보스 깊이가 30㎛인 경우 엠보스 질감이 양호하지 않았으며, 엠보스 깊이가 100㎛를 넘어 120㎛인 경우 크롬산 처리를 하여도 내식성이 급격히 감소하였다. 이로부터 본 발명의 범위인, 도금 부착량이 50~100g/m2 범위, 엠보스 깊이가 50~100㎛범위, 엠보스의 경사면과 평탄부(저면)의 연장선이 이루는 각도가 20~60도 범위일 때 엠보스 질감,내식성,가공성에서 우수한 결과를 나타냄을 알 수 있다. 한편, 비교예 7~9에서 볼 수 있는 것처럼, 도금부착량과 엠보스 깊이가 본 발명의 범위 내에 있어도 상기 각도가 60도를 넘는 경우는 가공성이 불량해짐을 알 수 있다. As can be seen from Table 1, the embossed texture was not good when the emboss depth is 30㎛ even if the coating adhesion amount of zinc-55% aluminum alloy by the hot dip plating method is within the range of 50 ~ 100g / m 2 , When the boss depth is more than 100 µm and 120 µm, the corrosion resistance was sharply reduced even with chromic acid treatment. From this, the plating deposition amount, which is the scope of the present invention, is in the range of 50 to 100 g / m 2 , the emboss depth is in the range of 50 to 100 μm, and the angle between the inclined surface of the emboss and the extension line of the flat portion (bottom) is in the range of 20 to 60 degrees. When the embossed texture, corrosion resistance, processability can be seen that excellent results. On the other hand, as can be seen in Comparative Examples 7 to 9, even when the plating deposition amount and the emboss depth are within the scope of the present invention, it can be seen that the workability is poor when the angle exceeds 60 degrees.
본 발명에 의하면, 용융도금방법을 사용하여 아연-55%알루미늄 합금을 도금함으로써 기존의 아연도금에 비해서 내식성이 우수하고 외관이 미려할 뿐만아니라, 엠보스 질감이 우수한 엠보스 강판의 제조가 가능하다.기존의 편면 엠보스 강판에 적용되고 있는 전기아연도금 피막은 내식성이 약해서 별도의 도장처리를 실시하여 사용하고 있는 실정이다. 그러나 본 발명에 따른 엠보스 강판은 내식성이 우수하여 도금상태 그대로 사용이 가능해 짐으로써, 종래의 엠보스 강판과 달리 별도의 도장처리없이 건자재 및 가전소재 분야에 적용될 수 있다.더욱이,현재까지는 건자재에 사용되는 제품에 엠보스 강판이 사용된 경우가 없었으나, 본 발명에 의해서 별도의 도장처리 없이도 높은 내식성을 가지며, 미려한 외관과 엠보스 질감이 접목된 엠보스 강판의 제조가 가능해짐으로써 건자재 분야에서의 신수요 창출이 가능할 것으로 기대된다.According to the present invention, the zinc-55% aluminum alloy is plated using the hot-dip plating method, so that it is possible to manufacture an embossed steel sheet having excellent corrosion resistance and beautiful appearance as well as excellent emboss texture compared to conventional zinc plating. The electrogalvanized film applied to the existing single-sided embossed steel sheet has a low corrosion resistance and is used by a separate coating treatment. However, since the embossed steel sheet according to the present invention is excellent in corrosion resistance and can be used as it is, it can be applied to dry materials and home appliance materials without a separate coating process, unlike conventional embossed steel sheets. Embossed steel sheet has never been used in the product used, but according to the present invention has a high corrosion resistance even without a separate coating treatment, it is possible to manufacture the embossed steel sheet grafted with a beautiful appearance and embossed texture in the field of construction materials It is expected that new demand will be created.
Claims (5)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6213201A (en) | 1985-07-10 | 1987-01-22 | Nisshin Steel Co Ltd | Production of galvanized and embossed steel sheet |
| KR20020079074A (en) * | 2001-04-13 | 2002-10-19 | 동부제강주식회사 | Pre-embossed hot-dip galvanized steel sheet |
| KR20020091603A (en) * | 2001-05-31 | 2002-12-06 | 연합철강공업 주식회사 | Colored steel sheet with single side embossed |
| JP2003306757A (en) | 2002-04-18 | 2003-10-31 | Jfe Steel Kk | HOT DIP Al-Zn ALLOY-COATED STEEL SHEET AND METHOD OF PRODUCING THE SAME |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6213201A (en) | 1985-07-10 | 1987-01-22 | Nisshin Steel Co Ltd | Production of galvanized and embossed steel sheet |
| KR20020079074A (en) * | 2001-04-13 | 2002-10-19 | 동부제강주식회사 | Pre-embossed hot-dip galvanized steel sheet |
| KR20020091603A (en) * | 2001-05-31 | 2002-12-06 | 연합철강공업 주식회사 | Colored steel sheet with single side embossed |
| JP2003306757A (en) | 2002-04-18 | 2003-10-31 | Jfe Steel Kk | HOT DIP Al-Zn ALLOY-COATED STEEL SHEET AND METHOD OF PRODUCING THE SAME |
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