KR102255908B1 - Apparatus and method for manufacturing ga/gi steel plate - Google Patents

Apparatus and method for manufacturing ga/gi steel plate Download PDF

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KR102255908B1
KR102255908B1 KR1020190161919A KR20190161919A KR102255908B1 KR 102255908 B1 KR102255908 B1 KR 102255908B1 KR 1020190161919 A KR1020190161919 A KR 1020190161919A KR 20190161919 A KR20190161919 A KR 20190161919A KR 102255908 B1 KR102255908 B1 KR 102255908B1
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steel sheet
double
heat treatment
steel plate
sided
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정의훈
유한성
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주식회사 포스코
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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
    • 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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/20—Strips; Plates
    • 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
    • C23C2/26—After-treatment
    • 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
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Coating With Molten Metal (AREA)

Abstract

Disclosed is a device for manufacturing a GA/GI double-sided steel plate. According to an embodiment of the present invention, the device for manufacturing a GA/GI double-sided steel plate comprises: a plating bath allowing a steel plate to be inserted to be molten and plated; an air knife controlling thickness of a plating layer of a surface of the steel plate passing the plating bath; an alloying heat treatment furnace positioned to face one surface of the steel plate for alloying one surface of the steel plate; and a cooling device positioned to face the other surface of the steel plate to perform cooling on the other opposite surface of one surface of the steel plate.

Description

GA/GI 양면강판 제조장치 및 제조방법{APPARATUS AND METHOD FOR MANUFACTURING GA/GI STEEL PLATE}GA/GI double-sided steel plate manufacturing device and manufacturing method {APPARATUS AND METHOD FOR MANUFACTURING GA/GI STEEL PLATE}

본 발명은 GA/GI 양면강판 제조장치 및 제조방법에 관한 것으로서, 보다 상세하게는 강판의 양면에 GA표면과 GI표면을 갖는 강판을 제조하는 장치 및 방법에 관한 것이다.The present invention relates to an apparatus and method for manufacturing a GA/GI double-sided steel sheet, and more particularly, to an apparatus and method for manufacturing a steel sheet having a GA surface and a GI surface on both sides of the steel sheet.

일반적으로 아연도금강판은 크게 용융아연도금강판(GI강판)과 합금화용융아연도금강판(GA강판)으로 구분된다.In general, galvanized steel sheets are largely divided into hot-dip galvanized steel sheets (GI steel sheets) and alloyed hot-dip galvanized steel sheets (GA steel sheets).

GI강판과 GA강판 모두 강판코일을 아연욕조에 통과시켜 아연도금피막을 형성하는 점에서는 공통되나, GA 강판은 아연도금피막을 추가적으로 합금화시키는 단계를 더 포함한다.Both GI and GA steel sheets are common in that a steel coil is passed through a zinc bath to form a galvanized film, but the GA steel sheet further includes a step of further alloying a galvanized film.

GI강판은 연속아연도금라인에서 탈지 및 열처리를 통하여 필요한 기계적 성질을 확보한 후 내식성을 보증하기 위한 목적으로 아연도금욕조를 통과한 후 냉각을 거쳐 냉각탑 상부의 방향전화 롤을 통과하여 다음 공정으로 진행하며 이후의 공정에서 표면조정, 형상교정 및 일시 방청처리를 행하여 최종적으로 제품화된다.GI steel sheet passes through a galvanized bath for the purpose of guaranteeing corrosion resistance after securing necessary mechanical properties through degreasing and heat treatment in a continuous zinc plating line, then cooling, passing through a directional roll at the top of the cooling tower, and proceeding to the next process. It is finally commercialized by performing surface adjustment, shape correction, and temporary rust prevention treatment in the subsequent process.

그런데 GA강판은 같은 연속 용융아연도금라인 내에서 도금 후 재가열, 균열, 냉각처리를 거친 후 냉각탑 상부의 방향전환 롤을 거쳐 다음 공정으로 진행하게 되어 있다.However, the GA steel sheet is plated in the same continuous hot dip galvanizing line, undergoes reheating, cracking, and cooling treatments, and then goes through the direction change roll on the top of the cooling tower to proceed to the next process.

이러한 특성 차이로 인해 해당 제품을 요구하는 고객사가 구분되어져 있으며, 고객사의 주문량에 따라서 GI강판과 GA강판의 생산 체제를 바꿈에 있어서 관련 설비 교체 휴지가 발생되어 생산 및 시간적 손실이 발생하는 문제가 발생한다.Due to this difference in characteristics, the customer requesting the product is classified, and in changing the production system of GI steel plate and GA steel plate according to the customer's order quantity, there is a problem that production and time loss occurs due to the interruption of related equipment replacement. do.

한국공개특허 제2012-0006346호(2012.01.18 공개)Korean Patent Publication No. 2012-0006346 (published on January 18, 2012)

본 발명의 실시 예들은 설비교체로 인한 시간 및 비용을 절감할 수 있는 GA/GI 양면강판 제조장치 및 제조방법을 제공하고자 한다.Embodiments of the present invention are intended to provide a GA/GI double-sided steel sheet manufacturing apparatus and manufacturing method capable of saving time and cost due to equipment replacement.

본 발명의 일 측면에 따르면, 강판을 인입시켜 용융도금하는 도금욕조와, 상기 도금욕조를 통과한 강판 표면의 도금층 두께를 조절하는 에어나이프와, 상기 강판의 일면에 대해 합금화처리를 위해 상기 강판의 일면과 마주하게 위치된 합금화 열처리로 및 상기 강판의 일면 반대쪽 타면에 대해 냉각을 수행하도록 상기 강판의 타면에 마주하게 위치된 냉각장치를 포함하는 GA/GI 양면강판 제조장치가 제공될 수 있다.According to an aspect of the present invention, a plating bath for hot-dip plating by inserting a steel sheet, an air knife for adjusting the thickness of a plating layer on the surface of the steel sheet passing through the plating bath, and an alloying treatment for one surface of the steel sheet. A GA/GI double-sided steel sheet manufacturing apparatus including an alloying heat treatment furnace positioned facing one side and a cooling device positioned facing the other side of the steel sheet to perform cooling on the other side opposite to one side of the steel sheet may be provided.

상기 합금화 열처리로는 상기 강판의 일면에 대해 직접 가열하는 가열장치를 포함한다.The alloying heat treatment furnace includes a heating device that directly heats one surface of the steel sheet.

상기 합금화 열처리로는 가열대 열처리로와, 상기 가열대 열처리로 상부에 위치된 균열대 열처리로를 포함한다.The alloying heat treatment furnace includes a heating zone heat treatment furnace and a crack zone heat treatment furnace located above the heating zone heat treatment furnace.

상기 에어나이프는 상기 강판의 타면에 대한 도금층 두께는 상기 강판의 일면에 대한 도금층 두께보다 크도록 조절할 수 있다.In the air knife, the thickness of the plating layer on the other surface of the steel sheet may be adjusted to be greater than the thickness of the plating layer on the other surface of the steel sheet.

상기 냉각장치는 상기 강판의 타면에 대해 냉각수 또는 냉기를 분출할 수 있다.The cooling device may eject cooling water or cold air from the other surface of the steel plate.

상기 냉각장치와 상기 열처리로 사이를 차폐시키도록 상기 강판의 양측방에 위치된 차폐장치를 더 포함한다.It further includes a shielding device positioned on both sides of the steel plate to shield between the cooling device and the heat treatment furnace.

상기 차폐장치는 상기 강판의 폭방향으로 진퇴 이동 가능한 차폐판과, 상기 강판의 폭에 대응하여 상기 차폐판을 이동시키는 구동부를 포함한다.The shielding device includes a shielding plate capable of moving forward and backward in the width direction of the steel sheet, and a driving unit for moving the shielding plate corresponding to the width of the steel sheet.

본 발명의 다른 측면에 따르면, 강판을 도금욕조에 진입시켜 강판의 표면에 도금층을 형성하고, 상기 도금욕조를 빠져 나오는 상기 강판의 양면에 대해 에어나이프를 이용하여 강판의 일면이 타면보다 도금층의 두께가 얇도록 조절하고, 상기 강판이 이동하는 동안 상기 강판의 일면에 대해서는 열처리로를 통해 가열하여 합금화 처리를 수행하면서 상기 강판의 타면에 대해서는 냉각장치를 이용하여 냉각을 수행하는 GA/GI 양면강판 제조방법이 제공될 수 있다.According to another aspect of the present invention, a plated layer is formed on the surface of the steel plate by entering the steel plate into the plating bath, and one side of the steel plate is thicker than the other side by using an air knife for both sides of the steel plate exiting the plating bath. GA/GI double-sided steel sheet manufacturing in which the steel sheet is adjusted to be thin, and while the steel sheet is moving, one side of the steel sheet is heated through a heat treatment furnace to perform alloying treatment, while the other side of the steel sheet is cooled using a cooling device. A method can be provided.

상기 강판의 양측방으로 차폐장치를 설치하여, 상기 열처리로와 상기 냉각장치를 이용한 가열 및 냉각과정에서 서로 간에 영향이 미치는 것을 방지할 수 있다.Shielding devices are installed on both sides of the steel plate, so that influences between each other during heating and cooling processes using the heat treatment furnace and the cooling device can be prevented.

본 발명의 실시 예들은 GI/GA 양면 강판을 제조하는 장치 및 방법에 의해 GI강판과 GA강판의 생산 체제를 변경하는데 발생하는 시간과 비용을 절감하여 생산성을 향상시킬 수 있게 된다.Embodiments of the present invention can improve productivity by reducing the time and cost incurred in changing the production system of GI and GA steel sheets by an apparatus and method for manufacturing GI/GA double-sided steel sheets.

도 1은 본 발명의 실시 예에 따른 GA/GI 양면강판 제조장치를 개략적으로 도시한 사시도이다.
도 2는 본 발명의 실시 예에 따른 GA/GI 양면강판 제조장치의 측면도이다.
도 3은 본 발명의 실시 예에 따른 에어나이프를 통해 조절된 강판의 양면에 도포된 도금층 두께를 도시한 것이다.
도 4는 본 발명의 실시 예에 따른 가열장치와 냉각장치 사이를 통과하는 강판을 도시한 것이다.
도 5는 본 발명의 실시 예에 따른 차폐장치의 동작 상태도이다.1 is a perspective view schematically showing a GA/GI double-sided steel sheet manufacturing apparatus according to an embodiment of the present invention.
2 is a side view of a GA/GI double-sided steel sheet manufacturing apparatus according to an embodiment of the present invention.
3 is a view showing the thickness of the plating layer applied to both sides of a steel sheet controlled by an air knife according to an embodiment of the present invention.
4 shows a steel plate passing between a heating device and a cooling device according to an embodiment of the present invention.
5 is an operational state diagram of a shielding device according to an embodiment of the present invention.

이하에서는 본 발명의 실시 예들을 첨부 도면을 참조하여 상세히 설명한다. 이하에 소개되는 실시 예들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상이 충분히 전달될 수 있도록 하기 위해 예로서 제공되는 것이다. 본 발명은 이하 설명되는 실시 예들에 한정되지 않고 다른 형태로 구체화될 수도 있다. 본 발명을 명확하게 설명하기 위하여 설명과 관계없는 부분은 도면에서 생략하였으며 도면들에 있어서, 구성요소의 폭, 길이, 두께 등은 편의를 위하여 과장되어 표현될 수 있다. 명세서 전체에 걸쳐서 동일한 참조번호들은 동일한 구성요소들을 나타낸다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples in order to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments described below and may be embodied in other forms. In order to clearly describe the present invention, parts irrelevant to the description are omitted from the drawings, and in the drawings, the width, length, thickness, etc. of components may be exaggerated and expressed for convenience. The same reference numerals represent the same elements throughout the specification.

도 1은 본 발명의 실시 예에 따른 GA/GI 양면강판 제조장치를 개략적으로 도시한 사시도이고, 도 2는 본 발명의 실시 예에 따른 GA/GI 양면강판 제조장치의 측면도이고, 도 3은 본 발명의 실시 예에 따른 에어나이프를 통해 조절된 강판의 양면에 도포된 도금층 두께를 도시한 것이고, 도 4는 본 발명의 실시 예에 따른 가열장치와 냉각장치 사이를 통과하는 강판을 도시한 것이고, 도 5는 본 발명의 실시 예에 따른 차폐장치의 동작 상태도이다.1 is a perspective view schematically showing a GA/GI double-sided steel sheet manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a side view of a GA/GI double-sided steel sheet manufacturing apparatus according to an embodiment of the present invention, and FIG. It shows the thickness of the plating layer applied to both sides of the steel plate controlled by the air knife according to the embodiment of the present invention, Figure 4 shows the steel plate passing between the heating device and the cooling device according to an embodiment of the present invention, 5 is an operational state diagram of a shielding device according to an embodiment of the present invention.

도 1 내지 도 5를 참조하면, 본 발명의 실시 예에 의한 GA/GI 양면강판 제조장치(10)는 강판(11)을 인입시켜 용융도금하는 도금욕조(20)와, 도금욕조(20)를 통과한 강판(11) 표면의 도금층 두께를 조절하는 에어나이프(30)와, 강판(11)의 일면(11a)에 대해 합금화 용융아연도금강판(이하 GA표면)을 생성하기 위한 합금화 열처리로(40) 및 강판(11)의 타면(11b)에 대해 용융아연도금강판(이하 GI표면)을 생성하기 위한 냉각장치(50)를 포함한다.1 to 5, the GA/GI double-sided steel sheet manufacturing apparatus 10 according to an embodiment of the present invention includes a plating bath 20 for hot-dip plating by inserting a steel sheet 11, and a plating bath 20 An air knife 30 for controlling the thickness of the plating layer on the surface of the passed steel sheet 11, and an alloying heat treatment furnace 40 for producing an alloyed hot-dip galvanized steel sheet (hereinafter referred to as GA surface) for one surface 11a of the steel sheet 11 ) And a cooling device 50 for generating a hot-dip galvanized steel sheet (hereinafter, GI surface) for the other surface 11b of the steel sheet 11.

도금욕조(20) 내부로는 소둔로(미도시)에서 열처리된 강판(11)이 스나우트(21)를 통해 유입되게 되고, 강판(11)은 도금욕조(20) 내에 배치된 싱크롤(22)에 의해 방향이 전환되어 도금욕조(20)를 빠져 나오면서 강판(11)의 표면에는 용융아연이 부착된다.Inside the plating bath 20, the steel sheet 11 heat-treated in an annealing furnace (not shown) is introduced through the snout 21, and the steel sheet 11 is a sink roll 22 disposed in the plating bath 20. ), the molten zinc adheres to the surface of the steel sheet 11 while the direction is switched and exits the plating bath 20.

싱크롤(22)의 상부에는 싱크롤(22)에 의해 방향 전환 후 상부로 배출되는 강판(11)의 외면을 지지하는 지지롤(23)과, 싱크롤(22)과 지지롤(23) 사이에서 지지롤(23)의 반대편에서 강판(11)의 외면을 가압하는 교정롤(24)이 구비될 수 있다.Above the sink roll 22, a support roll 23 supporting the outer surface of the steel plate 11 discharged to the top after direction change by the sink roll 22, and between the sink roll 22 and the support roll 23 A calibration roll 24 for pressing the outer surface of the steel plate 11 from the opposite side of the support roll 23 may be provided.

에어나이프(Air Knife,30)는 지지롤(23)의 상부에 설치되며, 도금욕조(20)로부터 배출되는 강판(11) 표면의 도금층 두께를 조절한다.An air knife (30) is installed on the top of the support roll (23), and controls the thickness of the plating layer on the surface of the steel plate (11) discharged from the plating bath (20).

에어나이프(30)는 강판(11)의 양측으로 마주하게 배치되어, 강판(11)의 표면을 향해 와이핑가스(예로서, 질소가스)를 분사하여 강판(11)의 도금층 두께를 조절할 수 있다.The air knife 30 is disposed to face to each side of the steel plate 11 and sprays a wiping gas (eg, nitrogen gas) toward the surface of the steel plate 11 to adjust the thickness of the plated layer of the steel plate 11. .

에어나이프(30)는 강판(11)의 양면에 대해 도금층의 두께가 서로 다르게 조절할 수 있다. 일 예로, 도 3과 같이, 에어나이프(30)는 합금화 열처리로(40)와 마주하는 강판(11)의 일면(11a)에 형성되는 도금층(12)의 두께가 냉각장치(50)와 마주하는 강판(11)의 타면(11b)에 형성되는 도금층(13)의 두께보다 작게 형성되도록 조절할 수 있다.The air knife 30 may have different thicknesses of the plating layers on both sides of the steel plate 11. As an example, as shown in FIG. 3, the air knife 30 has a thickness of the plating layer 12 formed on one surface 11a of the steel plate 11 facing the alloying heat treatment furnace 40. It can be adjusted to be formed to be smaller than the thickness of the plating layer 13 formed on the other surface (11b) of the steel plate (11).

강판(11)의 일면(11a)에 부착된 도금층(12)은 열처리로(40)에서 합금화처리되어 GA표면이 생성되고, 강판(11)의 타면(11b)에 부착된 도금층(13)은 냉각장치(50)에서 냉각되어 GI표면이 생성된다.The plated layer 12 attached to one side 11a of the steel plate 11 is alloyed in the heat treatment furnace 40 to create a GA surface, and the plated layer 13 attached to the other side 11b of the steel plate 11 is cooled. It is cooled in the device 50 to create a GI surface.

강판(11)의 양면(11a,11b)에 서로 다른 두께로 부착된 도금층(12,13)에 의해 열처리로(40)에서 강판(11)의 일면(11a)을 향해 발산된 열이 강판(11)을 통해 전도되더라도 강판(11)의 일면(11a) 도금층(12)보다 두꺼운 강판(11)의 타면(11b)에 부착된 도금층(13)은 합금화 처리되지 않게 된다.The heat dissipated from the heat treatment furnace 40 toward one side 11a of the steel sheet 11 by the plating layers 12 and 13 attached to both sides 11a and 11b of the steel sheet 11 with different thicknesses is transferred to the steel sheet 11 ), the plating layer 13 attached to the other surface 11b of the steel sheet 11, which is thicker than the plating layer 12 of the one surface 11a of the steel sheet 11, is not subjected to an alloying treatment.

열처리로(40)는 강판(11)의 일면(11a)에 부착된 도금층(12)에 대해 합금화 처리를 위한 가열을 수행한다.The heat treatment furnace 40 heats the plating layer 12 attached to the one surface 11a of the steel plate 11 for alloying treatment.

열처리로(40)는 강판(11)에 대해 직접 가열을 수행하는 가열장치(41)를 포함한다.The heat treatment furnace 40 includes a heating device 41 that directly heats the steel sheet 11.

가열장치(41)는 유도가열방식이 아닌 강판(11)에 대해 직접 가열을 수행할 수 있는 전열히터, 라디에이터, 직화버너 등을 포함할 수 있다.The heating device 41 may include an electric heating heater, a radiator, a direct fire burner, etc. that can directly heat the steel sheet 11, not the induction heating method.

가열장치(41)로서 유도가열방식을 이용한 경우에는 강판(11)의 타면(11b)에 부착된 도금층에 영향을 주게 되므로 가열장치(41)는 직접 가열방식을 이용함이 바람직하다.In the case of using the induction heating method as the heating device 41, since it affects the plating layer attached to the other surface 11b of the steel plate 11, it is preferable that the heating device 41 uses a direct heating method.

열처리로(40)는 강판(11)의 일면(11a) 도금층(12)에 대해 합금화처리를 위해 일정온도로 승온시키는 가열대 열처리로(40a)와, 가열대 열처리로(40a)에서 승온된 도금층(12)에 대해 승온된 일정 온도를 유지하기 위한 균열대 열처리로(40b)를 포함할 수 있다.The heat treatment furnace 40 includes a heating zone heat treatment furnace 40a that raises the temperature of the plated layer 12 on one surface 11a of the steel sheet 11 to a constant temperature for alloying treatment, and the plated layer 12 heated in the heating zone heat treatment furnace 40a. It may include a crack zone heat treatment furnace (40b) for maintaining a constant temperature raised for ).

냉각장치(50)는 강판(11)의 타면(11b)에 부착된 도금층(13)에 대해 냉각유체를 분출한다. 냉각유체는 냉각수 또는 냉기를 포함할 수 있다.The cooling device 50 jets a cooling fluid against the plating layer 13 attached to the other surface 11b of the steel plate 11. The cooling fluid may include cooling water or cold air.

냉각장치(50)는 냉각수를 공급받아 미스트 형태로 강판(11)의 타면(11b) 도금층(13)에 분출하거나, 냉각공기를 공급받아 강판(11)의 타면(11b) 도금층(13)에 분출할 수 있다.The cooling device 50 is supplied with cooling water and sprayed on the other surface 11b of the steel plate 11 in the form of a mist, or the other surface 11b of the steel plate 11 is supplied with cooling air and sprayed on the plating layer 13 can do.

냉각장치(50)에 의해 분출되는 냉각유체가 강판(11)의 일면(11a)에 부착된 도금층(12)에 영향에 주어 합금화를 방해하는 것을 방지하기 위해 강판(11)의 양측방에는 차폐장치(60)가 설치될 수 있다.Shielding devices on both sides of the steel plate 11 to prevent the cooling fluid ejected by the cooling device 50 from affecting the plating layer 12 attached to the one side 11a of the steel plate 11 and obstructing the alloying. 60 can be installed.

차폐장치(60)는 강판(11)의 양측방에서 가열장치(41)와 냉각장치(50) 사이를 차폐시키는 차폐판(61)과, 차폐판(61)을 이동시키는 구동부(62)를 포함할 수 있다.The shielding device 60 includes a shielding plate 61 that shields between the heating device 41 and the cooling device 50 at both sides of the steel sheet 11, and a driving unit 62 for moving the shielding plate 61. can do.

차폐판(61)은 강판(11)의 양측방에서 각각 대응하는 강판(11)의 측면을 향해 전후로 진퇴 이동할 수 있게 설치될 수 있고, 구동부(62)는 강판(11)의 폭에 대응하여 차폐판(61)을 이동시킬 수 있다. 구동부(62)는 전기식 또는 유압식 실린더를 포함할 수 있다.The shielding plate 61 may be installed so as to move back and forth toward the side of the corresponding steel plate 11 from both sides of the steel plate 11, and the driving part 62 is shielded corresponding to the width of the steel plate 11 The plate 61 can be moved. The drive unit 62 may include an electric or hydraulic cylinder.

이하에서는 본 발명의 실시 예에 따른 GA/GI 양면강판 제조장치를 이용한 GA/GI 양면강판 제조방법에 대하여 설명한다.Hereinafter, a GA/GI double-sided steel sheet manufacturing method using the GA/GI double-sided steel sheet manufacturing apparatus according to an embodiment of the present invention will be described.

먼저, 소둔로에서 열처리된 강판(11)은 도금욕조(20)에 침적되어 강판(11)의 표면에 용융아연도금이 도포된 도금층을 형성한 상태로 수직으로 방향을 바꾸어 상승하며, 도금욕조(20)를 통과한 강판은 에어나이프(30)를 통해 강판(11)의 일면(11a)과 타면(11b)의 도금층(12,13) 두께가 서로 다르게 조절된다.First, the steel sheet 11 heat-treated in the annealing furnace is immersed in the plating bath 20 to form a plating layer coated with hot-dip galvanization on the surface of the steel sheet 11, and then vertically shifts and rises, and the plating bath ( The thickness of the plated layers 12 and 13 on one side 11a and the other side 11b of the steel sheet 11 is adjusted differently through the air knife 30.

이때, 강판(11)의 일면(11a)은 GA표면을 형성하고, 강판(11)의 타면(11b)은 GI표면을 형성할 수 있도록 에어나이프(30)는 강판(11)의 일면(11a)이 타면(11b)보다 도금층의 두께가 얇도록 조절한다.At this time, one side 11a of the steel plate 11 forms a GA surface, and the other side 11b of the steel plate 11 forms a GI surface, so that the air knife 30 is one side 11a of the steel plate 11 The thickness of the plating layer is adjusted to be thinner than that of the other surface 11b.

에어나이프(30)를 통과한 강판(11)은 에어나이프(30)의 상부에 위치된 방향전환롤(15)을 향해 이송된다.The steel plate 11 that has passed through the air knife 30 is conveyed toward the direction changing roll 15 located above the air knife 30.

강판(11)이 이송되는 도중 강판(11)의 일면(11a)에 부착된 도금층(12)은 열처리로(40)를 통과하면서 가열되어 합금화 처리되어 GA표면이 생성되고, 강판(11)의 타면에 부착된 도금층(13)은 냉각장치(50)를 통과하면서 냉각되어 GI표면이 생성된다.While the steel plate 11 is being transferred, the plating layer 12 attached to the one side 11a of the steel plate 11 is heated while passing through the heat treatment furnace 40 to be alloyed to generate a GA surface, and the other side of the steel plate 11 The plating layer 13 attached to is cooled while passing through the cooling device 50 to generate a GI surface.

이때, 강판(11)의 양측방에 위치된 차폐판(61)은 강판(11)의 폭에 대응하여 이동함에 따라 열처리로(40)와 냉각장치(50) 사이를 차폐시켜 가열 및 냉각과정에서 서로 간에 미치는 영향을 줄이게 된다.At this time, the shielding plates 61 located on both sides of the steel plate 11 are moved to correspond to the width of the steel plate 11, thereby shielding between the heat treatment furnace 40 and the cooling device 50 to prevent heating and cooling. It will reduce the impact on each other.

이상에서는 특정의 실시 예에 대하여 도시하고 설명하였다. 그러나 상기한 실시 예에만 한정되지 않으며 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하의 청구범위에 기재된 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경 실시할 수 있을 것이다.In the above, specific embodiments have been illustrated and described. However, it is not limited only to the above-described embodiments, and those of ordinary skill in the art to which the invention pertains can perform various changes without departing from the gist of the technical idea of the invention described in the following claims.

10: GA/GI 양면강판 제조장치, 11: 강판,
12,13: 도금층, 20: 도금욕조,
30: 에어나이프, 40: 합금화 열처리로,
41: 가열장치, 50: 냉각장치,
60: 차폐장치, 61: 차폐판,
62: 구동부.10: GA/GI double-sided steel sheet manufacturing device, 11: steel sheet,
12,13: plating layer, 20: plating bath,
30: air knife, 40: alloying heat treatment furnace,
41: heating device, 50: cooling device,
60: shielding device, 61: shielding plate,
62: drive unit.

Claims (9)

강판을 인입시켜 용융도금하는 도금욕조;
상기 도금욕조를 통과한 강판 표면의 도금층 두께를 조절하는 에어나이프;
상기 강판의 일면에 대해 합금화처리를 위해 상기 강판의 일면과 마주하게 위치된 합금화 열처리로; 및
상기 강판의 일면 반대쪽 타면에 대해 냉각을 수행하도록 상기 강판의 타면에 마주하게 위치된 냉각장치;를 포함하는 GA/GI 양면강판 제조장치.A plating bath for hot-dip plating by introducing a steel sheet;
An air knife for adjusting the thickness of the plating layer on the surface of the steel sheet passing through the plating bath;
An alloying heat treatment furnace positioned to face one surface of the steel sheet for alloying treatment on one surface of the steel sheet; And
GA/GI double-sided steel sheet manufacturing apparatus comprising; a cooling device positioned to face the other surface of the steel sheet to perform cooling on the other surface opposite to one side of the steel sheet. 제1항에 있어서,
상기 합금화 열처리로는 상기 강판의 일면에 대해 직접 가열하는 가열장치를 포함하는 GA/GI 양면강판 제조장치.The method of claim 1,
The alloying heat treatment furnace GA/GI double-sided steel sheet manufacturing apparatus comprising a heating device that directly heats one surface of the steel sheet. 제2항에 있어서,
상기 합금화 열처리로는 가열대 열처리로와, 상기 가열대 열처리로 상부에 위치된 균열대 열처리로를 포함하는 GA/GI 양면강판 제조장치.The method of claim 2,
GA/GI double-sided steel sheet manufacturing apparatus comprising a heating zone heat treatment furnace and a crack zone heat treatment furnace located above the heating zone heat treatment furnace. 제1항에 있어서,
상기 에어나이프는 상기 강판의 타면에 대한 도금층 두께는 상기 강판의 일면에 대한 도금층 두께보다 크도록 조절하는 GA/GI 양면강판 제조장치.The method of claim 1,
The air knife is a GA/GI double-sided steel sheet manufacturing apparatus for controlling the thickness of the plating layer on the other side of the steel sheet to be greater than the thickness of the plating layer on one side of the steel sheet. 제1항에 있어서,
상기 냉각장치는 상기 강판의 타면에 대해 냉각수 또는 냉기를 분출하는 GA/GI 양면강판 제조장치.The method of claim 1,
The cooling device is a GA/GI double-sided steel sheet manufacturing device for ejecting cooling water or cold air to the other surface of the steel sheet. 제1항에 있어서,
상기 냉각장치와 상기 열처리로 사이를 차폐시키도록 상기 강판의 양측방에 위치된 차폐장치를 더 포함하는 GA/GI 양면강판 제조장치.The method of claim 1,
GA/GI double-sided steel sheet manufacturing apparatus further comprising a shielding device positioned on both sides of the steel sheet to shield between the cooling device and the heat treatment furnace. 제6항에 있어서,
상기 차폐장치는 상기 강판의 폭방향으로 진퇴 이동 가능한 차폐판과, 상기 강판의 폭에 대응하여 상기 차폐판을 이동시키는 구동부를 포함하는 GA/GI 양면강판 제조장치.The method of claim 6,
The shielding device is a GA/GI double-sided steel sheet manufacturing apparatus comprising a shielding plate capable of moving forward and backward in the width direction of the steel sheet, and a driving unit for moving the shielding plate in correspondence with the width of the steel sheet. 강판을 도금욕조에 진입시켜 강판의 표면에 도금층을 형성하고,
상기 도금욕조를 빠져 나오는 상기 강판의 양면에 대해 에어나이프를 이용하여 강판의 일면이 타면보다 도금층의 두께가 얇도록 조절하고,
상기 강판이 이동하는 동안 상기 강판의 일면에 대해서는 열처리로를 통해 가열하여 합금화 처리를 수행하면서 상기 강판의 타면에 대해서는 냉각장치를 이용하여 냉각을 수행하는 GA/GI 양면강판 제조방법.By entering the steel plate into the plating bath to form a plating layer on the surface of the steel plate,
Using an air knife for both sides of the steel sheet exiting the plating bath, one side of the steel sheet is adjusted so that the thickness of the plating layer is thinner than the other side,
GA/GI double-sided steel sheet manufacturing method in which an alloying treatment is performed by heating one side of the steel sheet through a heat treatment furnace while the steel sheet is moving, while cooling the other side of the steel sheet using a cooling device. 제8항에 있어서,
상기 강판의 양측방으로 차폐장치를 설치하여, 상기 열처리로와 상기 냉각장치를 이용한 가열 및 냉각과정에서 서로 간에 영향이 미치는 것을 방지하는 GA/GI 양면강판 제조방법.The method of claim 8,
GA/GI double-sided steel sheet manufacturing method for preventing influences between each other during heating and cooling processes using the heat treatment furnace and the cooling device by installing shielding devices on both sides of the steel sheet.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11217658A (en) * 1998-01-30 1999-08-10 Sumitomo Metal Ind Ltd Method and device for hot dipping
KR100511513B1 (en) * 2003-03-21 2005-09-02 주식회사 포스코 A method for equalizing iron content of GA steel plate
KR20100045287A (en) * 2008-10-23 2010-05-03 현대하이스코 주식회사 Continuous galvanizing line apparatus for providing high surface quality and manufacturing method using the same
KR20120006346A (en) 2010-07-12 2012-01-18 현대하이스코 주식회사 Method of manufacturing galvanized steel sheet for outer pannel of automoobile with excellent surface property

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11217658A (en) * 1998-01-30 1999-08-10 Sumitomo Metal Ind Ltd Method and device for hot dipping
KR100511513B1 (en) * 2003-03-21 2005-09-02 주식회사 포스코 A method for equalizing iron content of GA steel plate
KR20100045287A (en) * 2008-10-23 2010-05-03 현대하이스코 주식회사 Continuous galvanizing line apparatus for providing high surface quality and manufacturing method using the same
KR20120006346A (en) 2010-07-12 2012-01-18 현대하이스코 주식회사 Method of manufacturing galvanized steel sheet for outer pannel of automoobile with excellent surface property

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