KR101388364B1 - High corrosion resistant galvannealed steel sheet with excellent surface property and method for manufacturing the steel sheet - Google Patents
High corrosion resistant galvannealed steel sheet with excellent surface property and method for manufacturing the steel sheet Download PDFInfo
- Publication number
- KR101388364B1 KR101388364B1 KR1020110118362A KR20110118362A KR101388364B1 KR 101388364 B1 KR101388364 B1 KR 101388364B1 KR 1020110118362 A KR1020110118362 A KR 1020110118362A KR 20110118362 A KR20110118362 A KR 20110118362A KR 101388364 B1 KR101388364 B1 KR 101388364B1
- Authority
- KR
- South Korea
- Prior art keywords
- steel sheet
- zinc alloy
- hot
- dip zinc
- plated steel
- Prior art date
Links
Images
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
- C23C2/04—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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Coating With Molten Metal (AREA)
Abstract
표면특성이 우수한 고내식성 용융아연합금 도금강판, 그 제조 방법 및 이를 제조하기 위한 용융아연합금 도금액에 대하여 개시한다.
본 발명에 따른 용융아연합금 도금강판은 베이스 강판 표면에 용융아연합금 도금층이 형성되어 있되, 상기 용융아연합금 도금층은 중량%로, 마그네슘(Mg) : 0.5~2.0%, 알루미늄(Al) : 1.0~3.0%, 미쉬 메탈(misch metal) : 0.02~0.5% 및 나머지 아연(Zn)으로 이루어지는 것을 특징으로 한다. A high corrosion resistant hot dip zinc alloy plated steel sheet having excellent surface characteristics, a method for manufacturing the same, and a hot dip zinc alloy plating solution for producing the same are disclosed.
In the hot-dip zinc alloy plated steel sheet according to the present invention, a hot-dip zinc alloy plated layer is formed on the surface of the base steel sheet, and the hot-dip zinc alloy plated layer is in weight%, magnesium (Mg): 0.5-2.0%, aluminum (Al): 1.0- 3.0%, misch metal (misch metal): characterized in that consisting of 0.02 ~ 0.5% and the remaining zinc (Zn).
Description
본 발명은 자동차 외판 등에 사용되는 용융아연합금 도금강판 제조 기술에 관한 것으로, 보다 상세하게는 내식성이 우수하면서도 표면특성이 우수한 용융아연합금 도금강판, 그 제조 방법 및 이를 제조하기 위한 용융아연합금 도금액에 관한 것이다.
The present invention relates to a hot-dip zinc alloy plated steel sheet manufacturing technology used in automobile exterior panels, and more particularly, to a hot-dip zinc alloy plated steel sheet having excellent corrosion resistance and excellent surface properties, a method of manufacturing the same, and a hot-dip zinc alloy plating solution for producing the same. It is about.
자동차 외판용 강판의 경우, 고강도와 함께 높은 내식성, 그리고 우수한 표면품질이 요구된다. In the case of automotive exterior steel sheets, high corrosion resistance and high surface quality are required.
고강도의 경우, 강판 제조시 성분의 제어 혹은 공정 조건의 제어를 통하여 이루어지고 있다. In the case of high strength, it is achieved through control of components or control of process conditions at the time of steel sheet production.
내식성의 경우, 주로 용융아연합금 도금을 통하여 이루어지고 있다. 이러한 용융아연합금 도금의 경우, 강판의 내식성 향상에는 크게 기여할 수 있으나, 표면품질이 그리 좋지 못한 문제점이 있어, 이를 개선하기 위한 많은 연구가 진행되고 있다. In the case of corrosion resistance, it is mainly achieved through hot dip zinc alloy plating. In the case of the hot-dip zinc alloy plating, it can greatly contribute to improving the corrosion resistance of the steel sheet, there is a problem that the surface quality is not very good, many researches for improving this.
본 발명과 관련된 배경기술로는 대한민국 공개특허공보 제10-2009-0016852호(2009.02.18. 공개)에 개시된 표면품질이 우수한 용융아연도금강판, 합금화용융아연도금강판 및 이들의 제조 방법이 있다.
Background art related to the present invention is a hot-dip galvanized steel sheet, an alloyed hot-dip galvanized steel sheet and a manufacturing method thereof having excellent surface quality disclosed in Republic of Korea Patent Publication No. 10-2009-0016852 (2009.02.18. Publication).
본 발명의 목적은 도금층 성분 조절을 통하여 내식성이 우수하면서도 표면 특성이 우수한 용융아연합금 도금강판을 제공하는 것이다.It is an object of the present invention to provide a hot-dip zinc alloy plated steel sheet having excellent corrosion resistance and excellent surface properties through plating layer composition control.
본 발명의 다른 목적은 내식성 및 표면 특성이 우수한 용융아연합금 도금강판 제조 방법을 제공하는 것이다. Another object of the present invention is to provide a method for producing a hot-dip zinc alloy plated steel sheet excellent in corrosion resistance and surface properties.
본 발명의 또 다른 목적은 내식성 및 표면 특성이 우수한 용융아연합금 도금강판 제조에 이용되는 용융아연합금 도금액을 제공하는 것이다.
Still another object of the present invention is to provide a hot dip zinc alloy plating solution used for producing a hot dip galvanized steel sheet having excellent corrosion resistance and surface properties.
상기 하나의 목적을 달성하기 위한 본 발명의 실시예에 따른 용융아연합금 도금강판은 베이스 강판 표면에 용융아연합금 도금층이 형성되어 있되, 상기 용융아연합금 도금층은 중량%로, 마그네슘(Mg) : 0.5~2.0%, 알루미늄(Al) : 1.0~3.0%, 미쉬 메탈(misch metal) : 0.02~0.5% 및 나머지 아연(Zn)으로 이루어지는 것을 특징으로 한다. Hot-dip zinc alloy plated steel sheet according to an embodiment of the present invention for achieving the above object is a hot-dip zinc alloy plated layer is formed on the surface of the base steel sheet, the hot-dip zinc alloy plated layer by weight, magnesium (Mg): 0.5 2.0%, aluminum (Al): 1.0 to 3.0%, and a misch metal (misch metal): 0.02 to 0.5% and the remaining zinc (Zn) is characterized in that it consists of.
이때, 상기 용융아연합금 도금층은 실리콘(Si) : 0.02~1.0 중량% 를 더 포함할 수 있다.
In this case, the molten zinc alloy plating layer may further include silicon (Si): 0.02 ~ 1.0% by weight.
상기 다른 목적을 달성하기 위한 본 발명의 실시예에 따른 용융아연합금 도금강판 제조 방법은 (a) 중량%로, 마그네슘(Mg) : 0.5~2.0%, 알루미늄(Al) : 1.0~3.0%, 미쉬 메탈 : 0.02~0.5% 및 나머지 아연(Zn)으로 이루어지는 용융아연합금 도금액을 마련하는 단계; 및 (b) 베이스 강판을 상기 용융아연합금 도금액에 연속적으로 침지시켜, 상기 베이스 강판 표면에 도금층을 형성하는 단계;를 포함하는 것을 특징으로 한다.Method for producing a molten zinc alloy plated steel sheet according to an embodiment of the present invention for achieving the above another object is (a) wt%, magnesium (Mg): 0.5 ~ 2.0%, aluminum (Al): 1.0 ~ 3.0%, Misch Metal: preparing a molten zinc alloy plating solution consisting of 0.02 ~ 0.5% and the remaining zinc (Zn); And (b) continuously immersing the base steel sheet in the molten zinc alloy plating solution to form a plating layer on the surface of the base steel sheet.
이때, 상기 용융아연합금 도금액은 실리콘(Si) : 0.02~1.0중량% 를 더 포함할 수 있다. In this case, the molten zinc alloy plating solution may further include silicon (Si): 0.02 ~ 1.0% by weight.
또한, 상기 (b) 단계에서, 상기 용융아연합금 도금액의 온도를 430~480℃로 유지하는 것이 바람직하다.
In addition, in the step (b), it is preferable to maintain the temperature of the molten zinc alloy plating solution at 430 ~ 480 ℃.
상기 또 다른 목적을 달성하기 위한 본 발명의 실시예에 따른 용융아연합금 도금액은 중량%로, 마그네슘(Mg) : 0.5~2.0%, 알루미늄(Al) : 1.0~3.0%, 미쉬 메탈 : 0.02~0.5% 및 나머지 아연(Zn)으로 이루어지는 것을 특징으로 한다. Hot-dip zinc alloy plating solution according to an embodiment of the present invention for achieving the above another object by weight, magnesium (Mg): 0.5 ~ 2.0%, aluminum (Al): 1.0 ~ 3.0%, Misch metal: 0.02 ~ 0.5 It is characterized by consisting of% and the remaining zinc (Zn).
이때, 상기 용융아연합금 도금액은 실리콘(Si) : 0.02~1.0중량% 를 더 포함할 수 있다.
In this case, the molten zinc alloy plating solution may further include silicon (Si): 0.02 ~ 1.0% by weight.
본 발명에 따른 용융아연합금 도금강판은 용융아연합금 도금층에 의해 우수한 내식성을 갖는다. Hot-dip zinc alloy plated steel sheet according to the present invention has excellent corrosion resistance by the hot-dip zinc alloy plating layer.
특히 본 발명에 따른 용융아연합금 도금강판은 용융아연합금 도금층에 0.02~0.5중량%의 미쉬 메탈(misch metal)을 함유한 결과 매끄러운 표면과 광택성을 나타내었다.
In particular, the hot-dip zinc alloy plated steel sheet according to the present invention exhibited a smooth surface and glossiness as a result of containing 0.02-0.5% by weight of a misch metal in the hot-dip zinc alloy plated layer.
도 1은 본 발명에 따른 용융아연합금 도금강판을 개략적으로 나타낸 것이다.
Figure 1 schematically shows a hot-dip zinc alloy plated steel sheet according to the present invention.
본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 상세하게 후술되어 있는 실시예들을 참조하면 명확해질 것이다. 그러나, 본 발명은 이하에서 개시되는 실시예들에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 것이며, 단지 본 실시예들은 본 발명의 개시가 완전하도록 하며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다.Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.
이하, 첨부된 도면을 참조하여, 본 발명에 따른 표면특성이 우수한 고내식성 용융아연합금 도금강판, 그 제조 방법 및 이를 제조하기 위한 용융아연합금 도금액에 대하여 상세히 설명하기로 한다.
Hereinafter, with reference to the accompanying drawings, it will be described in detail with respect to the high corrosion-resistant hot-dip zinc alloy plated steel sheet having excellent surface properties according to the present invention, a manufacturing method and a hot-dip zinc alloy plating solution for producing the same.
도 1은 본 발명에 따른 용융아연합금 도금강판을 개략적으로 나타낸 것이다. Figure 1 schematically shows a hot-dip zinc alloy plated steel sheet according to the present invention.
도 1을 참조하면, 도시된 용융아연합금 도금강판(100)은 베이스 강판(110) 및 용융아연합금 도금층(120)을 포함한다. Referring to FIG. 1, the illustrated hot-dip zinc alloy plated
베이스 강판(110)은 슬라브 재가열, 열간압연 및 냉각/권취되는 과정으로 제조되는 열연강판이 될 수 있다. 또한, 베이스 강판(110)은 상기의 열연강판을 산세, 냉간압연 및 소둔처리하는 과정으로 제조되는 냉연강판이 될 수 있다. The
용융아연합금 도금층(120)은 베이스 강판(110) 표면에 형성된다. The hot-dip zinc
이때, 용융아연합금 도금층(120)은 중량%로, 마그네슘(Mg) : 0.5~2.0%, 알루미늄(Al) : 1.0~3.0%, 미쉬 메탈(misch metal) : 0.02~0.5% 및 나머지 아연(Zn)으로 이루어진다. At this time, the hot-dip zinc
또한, 용융아연합금 도금층(120)에는 실리콘(Si) : 0.02~1.0중량% 를 더 포함되어 있을 수 있다. In addition, the molten zinc
이하, 상기의 용융아연합금 도금층(120)에 포함되는 각 성분의 역할 및 함량에 대하여 설명하기로 한다.
Hereinafter, the role and content of each component included in the molten zinc
마그네슘(Mg)Magnesium (Mg)
마그네슘(Mg) 내식성을 향상시키는데 기여한다. Magnesium (Mg) Contributes to improving corrosion resistance.
상기 마그네슘은 도금층 전체 중량의 0.5~2.0중량%로 첨가되는 것이 바람직하다. 마그네슘의 첨가량이 0.5중량% 미만일 경우, 그 첨가 효과가 불충분하다. 반대로, 마그네슘의 첨가량이 2중량%를 초과하는 경우, 도금액의 드로스 발생의 원인이 된다.
The magnesium is preferably added in 0.5 to 2.0% by weight of the total weight of the plating layer. When the addition amount of magnesium is less than 0.5% by weight, the addition effect is insufficient. On the contrary, when the addition amount of magnesium exceeds 2 weight%, it causes a dross generation of a plating liquid.
알루미늄(Al) Aluminum (Al)
알루미늄(Al)은 내식성 향상에 기여하며, 또한 도금액의 드로스 형성을 억제하는데 기여한다. Aluminum (Al) contributes to improvement in corrosion resistance and also contributes to suppressing the formation of dross in the plating liquid.
상기 알루미늄(Al)은 도금액 전체 중량의 1.0~3.0중량%로 첨가되는 것이 바람직하다. 알루미늄의 첨가량이 1.0중량% 미만일 경우, 그 첨가 효과가 불충분하다. 반대로, 알루미늄의 첨가량이 3.0중량%를 초과하는 경우, 용접성이 저하되는 문제점이 있다.
The aluminum (Al) is preferably added at 1.0 to 3.0% by weight of the total weight of the plating liquid. When the addition amount of aluminum is less than 1.0 weight%, the addition effect is inadequate. On the contrary, when the addition amount of aluminum exceeds 3.0 weight%, there exists a problem that weldability falls.
미쉬 메탈(misch metal)Misch metal
미쉬 메탈은 모나자이트(Monazite), 바스트네사이트(Bastnaesite) 등의 광석으로부터 제조되는 희토류 금속 혼합물이다. 이러한 미쉬 메탈은 세륨(Ce)을 주성분으로 하고, 란탄(La), 네오디뮴(Nd), 프라세오디뮴(Pr) 등이 포함된다. Mish Metal is a rare earth metal mixture prepared from ores such as Monazite, Bastnaesite and the like. Such a mesh metal is mainly composed of cerium (Ce), and includes lanthanum (La), neodymium (Nd), praseodymium (Pr), and the like.
본 발명에서 미쉬 메탈은 Zn-Mg-Al 3원 공정상중 초정 Al-FCC 상의 결정립을 세밀화시켜, 용융아연합금 도금강판의 표면을 매끄럽게 하며, 또한 광택성을 향상시킨다. In the present invention, the mesh metal refines the crystal grains of the primary Al-FCC phase in the Zn-Mg-Al three-way process to smooth the surface of the hot-dip zinc alloy plated steel sheet and improve the glossiness.
상기 미쉬 메탈은 도금액 전체 중량의 0.02~0.5중량%로 첨가되는 것이 바람직하다. 상기 미쉬 메탈의 첨가범위에서 도금액의 드로스 발생을 억제하면서, 용융아연합금 도금강판의 표면특성을 충분히 향상시킬 수 있다. The mesh metal is preferably added at 0.02 to 0.5% by weight of the total weight of the plating liquid. It is possible to sufficiently improve the surface characteristics of the hot-dip zinc alloy plated steel sheet while suppressing the dross generation of the plating liquid in the addition range of the above-mentioned mesh metal.
미쉬 메탈의 첨가량이 0.02중량% 미만일 경우, 미쉬 메탈 첨가에 따른 표면 특성 향상이 불충분할 수 있다. 반대로, 미쉬 메탈의 첨가량이 0.5중량%를 초과하는 경우, 미쉬 메탈이 도금액 내 드로스 발생 원인이 되어 용융아연합금 도금강판의 표면특성을 오히려 저해시킬 우려가 있다.
When the added amount of the misch metal is less than 0.02% by weight, the improvement of the surface properties due to the addition of the misch metal may be insufficient. On the contrary, when the addition amount of the miscellaneous metal exceeds 0.5% by weight, the mismetal may cause dross in the plating solution, which may rather hinder the surface characteristics of the molten zinc alloy plated steel sheet.
실리콘(Si)Silicon (Si)
실리콘(Si)은 용융아연합금 도금층의 Fe-Zn 또는 Fe-Al 합금층의 성장을 억제시키고 도금부착성 향상을 위하여 첨가될 수 있다.Silicon (Si) may be added to suppress the growth of the Fe—Zn or Fe—Al alloy layer of the hot dip zinc alloy plating layer and to improve plating adhesion.
상기 실리콘이 첨가될 경우, 그 첨가량은 도금액 전체 중량의 0.02~1.0중량% 로 제한되는 것이 바람직하다. 실리콘의 첨가량이 0.02중량% 미만일 경우 Fe 합금층의 성장을 억제시키기에 불충분할 뿐만 아니라 내식성 향상에 기여하지 못한다. 반면 실리콘의 첨가량이 1.0중량%를 초과하는 경우, 아연 고상내 고용도를 벗어나게 되어 프레스나 다른 가공공정에 의해 도금층의 박리가 문제될 수 있다.
When the silicon is added, the amount is preferably limited to 0.02 ~ 1.0% by weight of the total weight of the plating liquid. When the amount of silicon added is less than 0.02% by weight, not only is it insufficient to suppress the growth of the Fe alloy layer, but also does not contribute to the improvement of the corrosion resistance. On the other hand, when the addition amount of silicon exceeds 1.0% by weight, the solid solution in the zinc solid phase is out of the solution may be a peeling of the plating layer by a press or other processing process.
상기 조성으로 이루어지는 용융아연합금 도금층(120)은 3~25㎛ 두께로 형성되어 있는 것이 보다 바람직하다. 용융아연합금 도금층 두께 조절을 위하여, 에어 나이프(air knife) 등이 이용될 수 있다. As for the molten zinc
용융아연합금 도금층의 두께가 3㎛ 미만일 경우, 충분한 희생방식성을 보장하기 어려워질 수 있다. 반대로, 용융아연합금 도금층의 두께가 25㎛를 초과하는 경우, 소지철의 희생방식이 가능한 방식기간은 더욱 연장되나 강판 제조 비용이 증가할 수 있다.
When the thickness of the hot-dip zinc alloy plating layer is less than 3 μm, it may be difficult to ensure sufficient sacrificial corrosion resistance. On the contrary, when the thickness of the hot-dip zinc alloy plating layer is more than 25 μm, the anticorrosive period in which the base metal can be sacrificed is further extended, but the steel sheet manufacturing cost may increase.
본 발명에 따른 용융아연합금 도금강판은 용융아연합금 도금액 마련 단계 및 도금층 형성 단계를 포함하는 과정으로 제조될 수 있다. The hot-dip zinc alloy plated steel sheet according to the present invention may be manufactured by a process including a hot-dip zinc alloy plating solution preparing step and a plating layer forming step.
용융아연합금 도금액 마련 단계에서는 전술한 조성을 갖는 용융아연합금 도금액을 마련한다.In the molten zinc alloy plating solution preparing step, a molten zinc alloy plating solution having the above-described composition is prepared.
다음으로, 도금층 형성 단계에서는 베이스 강판을 용융아연합금 도금액에 연속적으로 침지시켜, 베이스 강판 표면에 도금층을 형성한다. 이때, 도금액은 온도는 430~480℃로 유지되는 것이 바람직하다. 도금시 도금액의 온도가 430℃ 미만인 경우, 도금액의 유동성이 부족하여 베이스 강판 표면에 도금층이 충분히 형성되기 어려워질 수 있다. 반대로, 도금시 도금액의 온도가 480℃를 초과하는 경우, 도금 밀착성이 저하될 수 있다.
Next, in the plating layer forming step, the base steel sheet is continuously immersed in the molten zinc alloy plating liquid to form a plating layer on the surface of the base steel sheet. At this time, the plating liquid is preferably maintained at a temperature of 430 ~ 480 ℃. When the plating solution temperature is less than 430 ° C. during plating, the plating solution may be insufficient in fluidity of the plating solution and thus it may be difficult to form a plating layer on the surface of the base steel sheet sufficiently. On the contrary, when the temperature of the plating liquid exceeds 480 ° C during plating, the plating adhesion may be reduced.
실시예Example
이하, 본 발명의 바람직한 실시예를 통해 본 발명의 구성 및 작용을 더욱 상세히 설명하기로 한다. 다만, 이는 본 발명의 바람직한 예시로 제시된 것이며 어떠한 의미로도 이에 의해 본 발명이 제한되는 것으로 해석될 수는 없다. Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.
여기에 기재되지 않은 내용은 이 기술 분야에서 숙련된 자이면 충분히 기술적으로 유추할 수 있는 것이므로 그 설명을 생략하기로 한다.
Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.
1. 용융아연합금 도금강판의 제조1. Fabrication of hot-dip zinc alloy plated steel sheet
표 1에 도시된 조성을 갖는 실시예 1~3 및 비교예 1~3에 따른 도금액을 각각 마련한 후, 각각의 도금액을 470℃로 유지한 상태에서 냉연강판을 각각 침지시켜 두께 10㎛의 도금층을 형성하여 용융아연합금 도금강판을 제조하였다. After preparing the plating liquids according to Examples 1 to 3 and Comparative Examples 1 to 3 having the compositions shown in Table 1, the cold rolled steel sheets were immersed in the state where each plating liquid was maintained at 470 ° C. to form a plating layer having a thickness of 10 μm. To prepare a molten zinc alloy plated steel sheet.
[표 1](단위 : 중량%)[Table 1] (unit:% by weight)
2. 물성 평가 방법2. Property evaluation method
(1) 내식성 평가(1) Evaluation of corrosion resistance
내식성은 ASTM B117에 규정한 방법에 의거하여 실시예 1~3 및 비교예 1~3에 따른 도금액을 이용하여 제조된 도금강판 표면에 연속적으로 염수를 분무하여 소지철의 적청 발생시까지의 저항 시간을 기준으로 평가하였다.Corrosion resistance was measured by spraying brine continuously on the surface of the plated steel sheet prepared using the plating solution according to Examples 1 to 3 and Comparative Examples 1 to 3 according to the method specified in ASTM B117 to reduce the resistance time until the formation of red blue Evaluation was made based on the criteria.
○ : 1000시간 이상○: 1000 hours or more
△ : 500시간 이상, 1000시간 미만△: 500 hours or more, less than 1000 hours
X : 500시간 미만
X: less than 500 hours
(2) 밀착성 평가(2) Evaluation of adhesion
밀착성은 KS D0254에서 규정한 인발 시험 방법에 의거하여 플랜지로 누르거나 컵으로 눌러서 금속 소지와 도금된 부분 변형을 발생시킨 후 도금층의 박리 여부를 관찰하여 평가하였다.The adhesion was evaluated by pressing with a flange or a cup according to the pullout test method defined in KS D0254 to generate metal parts and plated partial deformation, and then observing the peeling of the plating layer.
◎ : 도금층의 박리 없음(매우 우수)◎: No peeling of the plating layer (excellent)
○ : 도금층의 미세 박리 발생(우수)○: Fine peeling of the plating layer (excellent)
△ : 도금층의 박리 다소 발생(보통)(Triangle | delta): Peeling of a plating layer a little generate | occur | produces (usually)
X : 전 도금층의 박리 발생(불량)
X: Peeling occurrence of all plating layers (defect)
(3) 표면 조도(3) Surface roughness
표면 조도는 SURFTEST(Mitutoyo, Japan)를 이용하여 실시예 1~3 및 비교예 1~3에 따른 도금액을 이용하여 제조된 도금강판의 평균조도(Ra)를 측정하였다.
Surface roughness was measured using the SURFTEST (Mitutoyo, Japan) to measure the average roughness (Ra) of the plated steel sheet produced using the plating solution according to Examples 1 to 3 and Comparative Examples 1 to 3.
(4) 광택도(4) glossiness
광택도는 광택도계(Tri-Microgloss-20-60-85, Sheen Instruments Ltd., England)를 이용하여 입사각 60°에서 실시예 1~3 및 비교예 1~3에 따른 도금액을 이용하여 제조된 도금강판의 광택도를 측정하였다.
Glossiness was plated using a plating solution according to Examples 1 to 3 and Comparative Examples 1 to 3 at an incident angle of 60 ° using a glossmeter (Tri-Microgloss-20-60-85, Sheen Instruments Ltd., England). The glossiness of the steel sheet was measured.
3. 물성 평가 결과3. Results of physical property evaluation
실시예 1~3 및 비교예 1~3에 따른 도금액을 이용하여 제조된 용융아연합금 도금강판에 대한 물성 평가 결과를 표 2에 나타내었다.Table 2 shows the results of evaluation of physical properties of the molten zinc alloy plated steel sheet manufactured using the plating solutions according to Examples 1 to 3 and Comparative Examples 1 to 3.
[표 2][Table 2]
표 2를 참조하면, 실시예 1~3에 따른 도금액을 이용하여 제조된 용융아연합금 도금강판의 경우, 내식성과 밀착성이 우수하였으며, 표면조도가 1.0㎛ 이하 및 광택도가 200 이상을 나타내어 비교예 1~2에 비하여 현저히 우수하였다. Referring to Table 2, in the case of the hot-dip zinc alloy plated steel sheet prepared using the plating solution according to Examples 1 to 3, the corrosion resistance and adhesion was excellent, the surface roughness is 1.0㎛ or less and the glossiness is 200 or more Comparative Example It was remarkably superior to 1-2.
반면, 미쉬 메탈이 첨가되지 않았거나, 미량 첨가된 비교예 1~2에 따른 도금액을 이용하여 제조된 용융아연합금 도금강판의 경우, 내식성 및 밀착성은 우수하였으나, 실시예 1~3에 비하여 표면조도 및 광택도가 좋지 못하였다. On the other hand, in the case of the hot-dip zinc alloy plated steel sheet prepared using the plating solution according to Comparative Examples 1 to 2 without the addition of the miss metal or the trace amount, the corrosion resistance and adhesion were excellent, but the surface roughness was higher than those of the Examples 1 to 3 And glossiness was poor.
또한, 미쉬 메탈이 과첨가된 비교예 3에 따른 도금액을 이용하여 제조된 용융아연합금 도금강판의 경우, 광택도는 우수하였으나, 표면조도가 좋지 못하였다.
In addition, in the case of the hot-dip zinc alloy plated steel sheet manufactured using the plating solution according to Comparative Example 3 in which the miss metal was over-added, the gloss was excellent, but the surface roughness was not good.
본 발명은 실시예를 참고로 하여 설명되었으나, 이는 예시적인 것에 불과하며, 당해 기술이 속하는 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다. 따라서, 본 발명의 진정한 기술적 보호범위는 특허청구범위에 의해서 정하여져야 할 것이다.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of protection of the present invention should be defined by the claims.
100 : 용융아연합금 도금강판
110 : 베이스 강판
120 : 용융아연합금 도금층100: hot dip zinc alloy plated steel sheet
110: base steel plate
120: hot dip zinc alloy plating layer
Claims (8)
상기 용융아연합금 도금층은 중량%로, 마그네슘(Mg) : 0.5~2.0%, 알루미늄(Al) : 1.0~3.0%, 미쉬 메탈(misch metal) : 0.02~0.5% 및 나머지 아연(Zn)으로 이루어져, 표면조도(Ra)가 1.0㎛ 이하이고, 입사각 60°에 대한 광택도가 200 이상을 나타내는 것을 특징으로 하는 용융아연합금 도금강판.
Hot-dip zinc alloy plating layer is formed on the surface of the base steel sheet 3 ~ 25㎛ thick,
The hot-dip zinc alloy plating layer by weight, magnesium (Mg): 0.5 ~ 2.0%, aluminum (Al): 1.0 ~ 3.0%, misch metal (misch metal): 0.02 ~ 0.5% and the remaining zinc (Zn), A hot-dip zinc alloy plated steel sheet having a surface roughness Ra of 1.0 µm or less and showing glossiness of 200 or more at an incident angle of 60 °.
상기 용융아연합금 도금층은
실리콘(Si) : 0.02~1.0중량%를 더 포함하는 것을 특징으로 하는 용융아연합금 도금강판.
3. The method of claim 2,
The hot dip zinc alloy plating layer
Silicon (Si): Hot-dip zinc alloy plated steel sheet, characterized in that it further comprises 0.02 ~ 1.0% by weight.
(b) 베이스 강판을 상기 용융아연합금 도금액에 연속적으로 침지시켜, 상기 베이스 강판 표면에, 표면조도(Ra)가 1.0㎛ 이하이고, 입사각 60°에 대한 광택도가 200 이상인 도금층을 형성하는 단계;를 포함하는 것을 특징으로 하는 용융아연합금 도금강판 제조 방법.
(a) preparing a molten zinc alloy plating solution composed of magnesium (Mg): 0.5 to 2.0%, aluminum (Al): 1.0 to 3.0%, misc metal: 0.02 to 0.5% and the remaining zinc (Zn) in weight% ; And
(b) continuously immersing a base steel sheet in the molten zinc alloy plating solution to form a plating layer having a surface roughness Ra of 1.0 µm or less and a glossiness of 200 or more for an incident angle of 60 ° on the surface of the base steel sheet; Hot-dip zinc alloy plated steel sheet manufacturing method comprising a.
상기 용융아연합금 도금액은
실리콘(Si) : 0.02~1.0중량%를 더 포함하는 것을 특징으로 하는 용융아연합금 도금강판 제조 방법.
5. The method of claim 4,
The molten zinc alloy plating solution
Silicon (Si): hot dip zinc alloy plated steel sheet manufacturing method characterized in that it further comprises 0.02 ~ 1.0% by weight.
상기 (b) 단계에서,
상기 용융아연합금 도금액의 온도를 430~480℃로 유지하는 것을 특징으로 하는 용융아연합금 도금강판 제조 방법.
5. The method of claim 4,
In the step (b)
Hot-dip zinc alloy plated steel sheet manufacturing method characterized in that the temperature of the hot-dip zinc alloy plating solution is maintained at 430 ~ 480 ℃.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020110118362A KR101388364B1 (en) | 2011-11-14 | 2011-11-14 | High corrosion resistant galvannealed steel sheet with excellent surface property and method for manufacturing the steel sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020110118362A KR101388364B1 (en) | 2011-11-14 | 2011-11-14 | High corrosion resistant galvannealed steel sheet with excellent surface property and method for manufacturing the steel sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20130053500A KR20130053500A (en) | 2013-05-24 |
KR101388364B1 true KR101388364B1 (en) | 2014-04-25 |
Family
ID=48662690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020110118362A KR101388364B1 (en) | 2011-11-14 | 2011-11-14 | High corrosion resistant galvannealed steel sheet with excellent surface property and method for manufacturing the steel sheet |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR101388364B1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002220650A (en) | 2001-01-24 | 2002-08-09 | Kawasaki Steel Corp | Molten zinc-alloy plated steel-sheet superior in corrosion resistance and surface appearance, and manufacturing method therefor |
JP2002332555A (en) * | 2001-05-14 | 2002-11-22 | Nisshin Steel Co Ltd | HOT DIP Zn-Al-Mg BASED ALLOY PLATED STEEL HAVING EXCELLENT CORROSION RESISTANCE |
KR20070029267A (en) * | 2004-06-29 | 2007-03-13 | 코루스 스타알 베.뷔. | Steel sheet with hot dip galvanized zinc alloy coating and process to produce it |
KR20080104554A (en) * | 2007-05-28 | 2008-12-03 | 문병원 | Hot-dip galvanizing method for fastener |
-
2011
- 2011-11-14 KR KR1020110118362A patent/KR101388364B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002220650A (en) | 2001-01-24 | 2002-08-09 | Kawasaki Steel Corp | Molten zinc-alloy plated steel-sheet superior in corrosion resistance and surface appearance, and manufacturing method therefor |
JP2002332555A (en) * | 2001-05-14 | 2002-11-22 | Nisshin Steel Co Ltd | HOT DIP Zn-Al-Mg BASED ALLOY PLATED STEEL HAVING EXCELLENT CORROSION RESISTANCE |
KR20070029267A (en) * | 2004-06-29 | 2007-03-13 | 코루스 스타알 베.뷔. | Steel sheet with hot dip galvanized zinc alloy coating and process to produce it |
KR20080104554A (en) * | 2007-05-28 | 2008-12-03 | 문병원 | Hot-dip galvanizing method for fastener |
Also Published As
Publication number | Publication date |
---|---|
KR20130053500A (en) | 2013-05-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6346972B6 (en) | Zn-Mg alloy plated steel sheet and method for producing the same | |
JP5884151B2 (en) | Steel sheet for hot press and method for producing hot press member using the same | |
TWI451004B (en) | Steel plate for hot pressing and method for manufacturing hot pressing component using the same | |
US9302449B2 (en) | High corrosion resistant hot dip Zn alloy plated steel sheet | |
CN103620079B (en) | High-corrosion-resistance hot-dip galvanized steel plate having highly uniform appearance and manufacturing method therefor | |
KR101731740B1 (en) | Steel sheet for hot press-forming, hot press-formed part, and method for producing hot press-formed part | |
CN117026132A (en) | Molten Al-Zn-Mg-Si-Sr plated steel sheet and method for producing same | |
TW201348512A (en) | Steel sheet for hot pressing, process for manufacturing the steel sheet and process for manufacturing hot-pressed member using the steel sheet | |
TWI521092B (en) | Hot dip a1-zn plated steel sheet and method of manufacturing the same | |
CN114787411A (en) | Hot-dip galvanized steel sheet having excellent bending workability and corrosion resistance, and method for producing same | |
WO2015055285A1 (en) | Steel substrate with zinc alloy coating | |
US20150184275A1 (en) | Method and apparatus for producing zinc-aluminum alloy-coated steel sheet with superior workability and corrosion resistance | |
KR20140043337A (en) | Molten zn-al-based alloy-plated steel sheet having excellent corrosion resistance and workability, and method for producing same | |
JP6028843B2 (en) | Steel sheet for hot press and method for producing hot press member using the same | |
KR101388364B1 (en) | High corrosion resistant galvannealed steel sheet with excellent surface property and method for manufacturing the steel sheet | |
JP2020041175A (en) | Steel plate for hot pressing | |
KR20180017241A (en) | Hot-pressed member and method for manufacturing the same | |
CN114182188A (en) | Hot-dip zinc-aluminum-magnesium-coated steel plate and preparation method thereof | |
CN114369782A (en) | Hot-dip galvanized steel plate without micro-cracks and preparation method thereof | |
JP2018090885A (en) | MOLTEN Zn-Al-Mg GROUP PLATED SHEET STEEL, AND MOLTEN Zn-Al-Mg GROUP PLATED SHEET STEEL MANUFACTURING METHOD | |
KR101388332B1 (en) | Zinc alloy plating steel sheet with excellent corrosion resistant and method for manufacturing the same | |
KR20140066020A (en) | Hot-dip aluminium-magnesium-silicon based alloy coated steel sheet with excellent sacrificial protection and method of maunfacturing the same | |
JP2020105554A (en) | Alloyed hot-dip galvanized film | |
CN112639153A (en) | Hot-dip plated steel sheet having excellent corrosion resistance and workability, and method for producing same | |
TWI682041B (en) | Zinc-coated steel sheet and method of forming the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
N231 | Notification of change of applicant | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20170410 Year of fee payment: 4 |
|
FPAY | Annual fee payment |
Payment date: 20180404 Year of fee payment: 5 |
|
FPAY | Annual fee payment |
Payment date: 20190402 Year of fee payment: 6 |