KR20110022336A - Apparatus for preventing partial over-cooling of hot-rolled steel sheet - Google Patents

Apparatus for preventing partial over-cooling of hot-rolled steel sheet Download PDF

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Publication number
KR20110022336A
KR20110022336A KR1020090079874A KR20090079874A KR20110022336A KR 20110022336 A KR20110022336 A KR 20110022336A KR 1020090079874 A KR1020090079874 A KR 1020090079874A KR 20090079874 A KR20090079874 A KR 20090079874A KR 20110022336 A KR20110022336 A KR 20110022336A
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South Korea
Prior art keywords
cooling
hot
air
steel sheet
rolled sheet
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KR1020090079874A
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Korean (ko)
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도형협
신진욱
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현대제철 주식회사
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Priority to KR1020090079874A priority Critical patent/KR20110022336A/en
Publication of KR20110022336A publication Critical patent/KR20110022336A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0281—Cleaning devices removing liquids removing coolants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

PURPOSE: An apparatus for preventing the local over-cooling of a hot-rolled steel sheet is provided to reduce non-uniform material difference in the width and length directions of the hot-rolled steel sheet and to enhance productivity. CONSTITUTION: An apparatus for preventing the local over-cooling of a hot-rolled steel sheet comprises a cooling station. The cooling station sprays the cooling water to the hot-rolled steel sheet, which has been transferred by a transfer roll, to cool the steel sheet. An air spraying unit(50) is installed on the upper part of the end of the cooling station. The air spraying unit sprays the air, removes the cooling water from the hot-rolled steel sheet and prevents local over-cooling due to the cooling water. The air spraying unit comprises a base pipe(52) and a spraying nozzle(53). The air is supplied to the base pipe. The spraying nozzle is formed on the outer circumferential surface of the base pipe and sprays the air to the hot-rolled steel sheet.

Description

열연판재의 국부과냉 방지장치{Apparatus for preventing Partial Over-cooling of Hot-Rolled Steel Sheet}Apparatus for preventing Partial Over-cooling of Hot-Rolled Steel Sheet}

본 발명은 열연판재의 국부과냉 방지장치에 관한 것으로서, 보다 상세하게는 잔류 냉각수에 의한 국부과냉으로 인해 발생하는 반점이 생기지 않도록 하는 열연판재의 국부과냉 방지장치에 관한 것이다.The present invention relates to an apparatus for preventing local subcooling of a hot rolled sheet, and more particularly, to an apparatus for preventing local subcooling of a hot rolled sheet to prevent spots caused by local subcooling by residual cooling water.

통상적으로 제철소의 열간압연기에서 열간 압연 처리된 열연판재는 목적하는 기계적 성질을 확보하기 위해 냉각대에서 수냉되는데, 서로 반대방향으로 회전하는 사상 압연기에 의해 압연 처리된 고온의 열연판재는 이송롤에 의해 이송되면서 냉각대 상에서 분사되는 냉각수에 의해 냉각된다. In general, hot rolled sheet material hot-rolled in a hot rolling mill of a steel mill is water-cooled in a cooling stand to secure desired mechanical properties. The hot rolled sheet material, which is rolled by a finishing mill rotating in opposite directions, is rolled by a feed roll. It is cooled by the coolant sprayed on the cooling table while being transported.

자동차 샤시부품에 적용되는 열연판재는 내피로성을 포함한 내구성, 고강도 및 고버링성, 우수한 용접성이 요구되는데, 또한 고강도화와 더불어 복잡한 형상의 부품으로 가공될 때 견딜 수 있는 성형성이 요구된다.Hot rolled sheet material applied to automobile chassis parts requires durability including fatigue resistance, high strength and high burring resistance, and excellent weldability, and also requires high formability and moldability to be processed when processing into a complicated shape part.

이러한 고강도-고성형성 강재의 경우, 냉각대(ROT : Run Out Table)에서 다양한 냉각제어를 통해 저온변태상을 일정량 분산시켜 고강도화 및 연성, 신장플랜지성의 저하를 억제하거나 개선시킨 열연판재가 개발되고 있다.In the case of such high-strength-formed steels, a hot rolled sheet material is developed that suppresses or improves the strength of the high-strength, ductility and extension flanges by dispersing a certain amount of low temperature transformation phase through various cooling controls in a cooling out (ROT: Run Out Table). have.

그런데, 열연강판이 고강도화 될수록 사상압연의 부하 배분변화, 스탠드 간의 형상제어 차이발생, 초기 크라운의 설정치에 따라 사상압연후 권취전의 압연코일의 머리(Top)부 및 꼬리(Tail)부에 웨이브(Wave)가 발생하여 열연판재 표면에 잔류수가 남아 국부적인 과냉부분(반점)이 발생하게 되어 소재에 재질편차가 발생하게 된다는 문제점이 있었다.However, the higher the strength of the hot rolled steel sheet, the change in load distribution of finishing rolling, the difference in shape control between the stands, and the top and tail of the rolling coil before winding after finishing rolling according to the initial crown setting. ), Residual water remained on the surface of the hot rolled sheet, causing local subcooled parts (spots), resulting in material deviation in the material.

본 발명의 상기 문제점을 해결하기 위해 이루어진 것으로서 본 발명의 목적은 잔류 냉각수에 의한 국부과냉으로 인해 발생하는 반점이 생기지 않도록 하여 열연판재의 폭 및 길이방향으로 발생하는 불균일한 재질편차를 줄이는 열연판재의 국부과냉 방지장치를 제공하는 데 있다.An object of the present invention is to solve the above problems of the present invention is to prevent the occurrence of spots caused by local supercooling by the residual cooling water to reduce the non-uniform material deviation occurring in the width and length direction of the hot rolled sheet material To provide a local subcooling device.

본 발명에 의한 열연판재의 국부과냉 방지장치는, 이송롤에 의해 이송되는 고온의 열연판재에 냉각수를 분사하여 냉각하는 냉각대를 구비하고, 상기 냉각대의 끝단부 상측에는 상기 열연판재에 잔류하는 냉각수에 의한 국부과냉을 방지하도록 에어를 분사하여 잔류 냉각수를 제거하는 에어분사수단이 설치된 것을 특징으로 한다.The apparatus for preventing local subcooling of a hot rolled sheet according to the present invention includes a cooling stand for spraying and cooling a coolant onto a hot rolled sheet material having a high temperature conveyed by a feed roll, and the cooling water remaining in the hot rolled sheet material above the end of the cooling stand. Air spraying means for spraying the air to prevent residual subcooling by removing the residual cooling water is characterized in that it is installed.

상기 에어분사수단은, 에어가 공급되는 베이스관과, 상기 열연판재를 향해 에어가 분사되도록 상기 베이스관의 외주면에 형성된 분사노즐을 포함한다. The air injection means includes a base tube to which air is supplied, and an injection nozzle formed on an outer circumferential surface of the base tube to inject air toward the hot rolled sheet material.

상기 베이스관에는 상기 열연판재의 형상이나 두께 등에 따라 상기 에어분사 수단을 상하로 이동시키는 이동수단이 추가로 결합되어 있다.The base tube is further coupled with a moving means for moving the air injection means up and down in accordance with the shape or thickness of the hot rolled sheet material.

본 발명에 의한 열연판재의 국부과냉 방지장치에 의하면, 잔류 냉각수에 의한 국부과냉으로 인해 발생하는 반점이 생기지 않도록 하여 열연판재의 폭 및 길이방향으로 발생하는 불균일한 재질편차를 줄이고, 생산성도 함께 향상하는 효과가 있다.According to the apparatus for preventing local subcooling of a hot rolled sheet according to the present invention, it is possible to prevent spots caused by local supercooling by residual cooling water, thereby reducing non-uniform material variation occurring in the width and length of the hot rolled sheet and improving productivity. It is effective.

이하, 본 발명의 실시예에 대해 첨부도면을 참조하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도1은 본 발명에 의한 열연판재의 국부과냉 방지장치를 설명하기 위한 전체 도면이고, 도2는 도1의 에어분사수단을 나타낸 상세도이다. 도시한 바와 같이, 서로 반대방향으로 회전하는 사상 압연기(10)에 의해 압연 처리된 고온의 열연판재(30)는 이송롤(20)에 의해 이송되면서 다수의 냉각수 분사수단(45)에 의해 분사되는 냉각수에 의해 냉각되는 냉각대(40, ROT : Run Out Table)를 거친 후 권취기(60)에서 권취된다.1 is an overall view for explaining a local supercooling preventing device of a hot rolled sheet according to the present invention, Figure 2 is a detailed view showing the air injection means of FIG. As shown, the hot rolled sheet material 30, which is rolled by the finishing mill 10, which rotates in the opposite direction to each other, is sprayed by the plurality of coolant spray means 45 while being transported by the feed roll 20. After the cooling table 40 (ROT: Run Out Table) cooled by the cooling water is wound in the winder (60).

이때, 상기 냉각대(40)의 끝단부 상측에는 열연판재(30)에 잔류하는 냉각수에 의한 국부과냉을 방지하도록 에어를 분사하여 잔류 냉각수를 제거하는 에어분사수단(50)이 설치되어 있다.At this time, the air injection means 50 is provided above the end of the cooling table 40 to remove residual cooling water by spraying air to prevent local subcooling by the cooling water remaining in the hot rolled sheet material (30).

상기 에어분사수단(50)은 에어공급관(51)을 통해 에어가 공급되는 베이스관(52)과, 상기 열연판재(30)를 향해 에어가 분사되도록 베이스관(52)의 외주면에 형성된 다수의 분사노즐(53)을 구비하며, 상기 베이스관(52)의 외주면 상측에는 상 기 열연판재의 형상이나 두께 등에 따라 에어분사수단(50)을 상하로 이동시키는 이동수단(55)이 추가로 결합되어 있다The air injection means 50 includes a base pipe 52 through which air is supplied through the air supply pipe 51, and a plurality of injections formed on the outer circumferential surface of the base pipe 52 so that air is injected toward the hot rolled sheet material 30. Is provided with a nozzle 53, the moving means 55 for moving the air injection means 50 up and down is further coupled to the upper side of the outer circumferential surface of the base tube 52 and the like according to the shape and thickness of the hot-rolled sheet material.

상기 분사노즐(53)은 관 형태의 돌출관 단부에 다수의 분사구멍이 형성된 구조로서, 상기 베이스관(52)에 직접 분사구멍이 형성된 구조로 되어 있을 수도 있다.The injection nozzle 53 has a structure in which a plurality of injection holes are formed at the end of the tube-shaped protruding tube, and may have a structure in which the injection holes are directly formed in the base tube 52.

상기 이동수단(55)은 유압실린더 또는 공압실린더 등으로 되어 있으며, 모터등을 구동하여 베이스관(52)을 이동시키는 구조로 되어 있을 수도 있다.The movement means 55 is made of a hydraulic cylinder or a pneumatic cylinder, etc., may be of a structure for moving the base pipe 52 by driving a motor or the like.

상기 이동수단(55)은 도시하지 않은 센서의 감지신호를 받아 제어부에 의해 제어되어 실린더의 작동에 의해 베이스관(52)이 상하로 이동되는 구조이다.The moving unit 55 is controlled by a control unit in response to a detection signal of a sensor (not shown) to move the base tube 52 up and down by the operation of the cylinder.

상기 에어분사수단(50)은 커튼식, 유압식, 근접식 등 다양한 형태의 분사수단으로 구성될 수 있다.The air injection means 50 may be composed of a variety of injection means, such as curtain, hydraulic, proximity.

이와 같이 구성된 본 발명에 의한 열연판재의 국부과냉 방지장치는, 열간압연후 냉각대(40)를 거치면서 분사된 냉각수에 의해 냉각된 열연판재(30)에서 도3에 도시한 바와 같이 열연판재(30)의 머리(Top)부, 꼬리(Tail)부 또는 미 텐션(Tension)부에 웨이브(V, Wave)가 형성되어 열연판재(30)의 표면에 잔류하는 냉각수(W)를 효과적으로 제거하여 국부과냉 부분(반점)이 생기지 않게 하므로, 열연판재의 폭 및 길이방향으로 발생하는 불균일한 재질편차를 줄이게 된다. 이와 함께 냉각수 제거를 효율적으로 하므로 권취속도를 높여 생산성도 함께 향상하는 효과가 있다.The local supercooling preventing device of the hot rolled sheet material according to the present invention configured as described above is a hot rolled sheet material 30 as shown in FIG. 3 in the hot rolled sheet material 30 cooled by the cooling water injected through the cooling table 40 after hot rolling. Wave (V, Wave) is formed in the top portion, tail portion or tension portion of the 30) to effectively remove the cooling water (W) remaining on the surface of the hot rolled sheet material 30 Since the subcooled portion (spot) is not generated, the non-uniform material deviation occurring in the width and length direction of the hot rolled sheet material is reduced. In addition, since the cooling water is efficiently removed, the winding speed is increased, thereby improving productivity.

도1은 본 발명에 의한 열연판재의 국부과냉 방지장치를 설명하기 위한 전체 도면, BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall view for explaining a local supercooling preventing device of a hot rolled sheet according to the present invention;

도2는 도1의 에어분사수단을 나타낸 상세도,Figure 2 is a detailed view showing the air injection means of Figure 1;

도3은 본 발명에 의한 열연판재의 국부과냉 방지장치의 작용을 설명하는 도면이다.3 is a view for explaining the action of the local supercooling preventing device of the hot rolled sheet material according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

40 : 냉각대 50 : 에어분사수단40: cooling zone 50: air injection means

52 : 베이스관 53 : 분사노즐52: base tube 53: injection nozzle

55 : 이동수단55: means of transportation

Claims (3)

이송롤에 의해 이송되는 고온의 열연판재에 냉각수를 분사하여 냉각하는 냉각대를 구비하고, It is provided with a cooling table for cooling by spraying the cooling water to the hot hot rolled sheet material conveyed by the feed roll, 상기 냉각대의 끝단부 상측에는 열연판재에 잔류하는 냉각수에 의한 국부과냉을 방지하도록 에어를 분사하여 잔류 냉각수를 제거하는 에어분사수단이 설치된 것을 특징으로 하는 열연판재의 국부과냉 방지장치.And an air spraying means for spraying air to remove residual coolant to prevent local overcooling by the coolant remaining in the hot rolled sheet. 청구항 1에 있어서,The method according to claim 1, 상기 에어분사수단은, The air injection means, 에어가 공급되는 베이스관과, A base pipe to which air is supplied, 상기 열연판재를 향해 에어가 분사되도록 베이스관의 외주면에 형성된 분사노즐을 포함하는 것을 특징으로 하는 열연판재의 국부과냉 방지장치.And a spray nozzle formed on an outer circumferential surface of the base tube so that air is injected toward the hot rolled sheet material. 청구항 2에 있어서,The method according to claim 2, 상기 베이스관에는 상기 열연판재의 형상이나 두께 등에 따라 에어분사수단을 상하로 이동시키는 이동수단이 추가로 결합된 것을 특징으로 하는 열연판재의 국부과냉 방지장치.The base tube is a local supercooling prevention device of the hot rolled sheet, characterized in that the movement means for moving the air injection means up and down is further coupled in accordance with the shape or thickness of the hot rolled sheet.
KR1020090079874A 2009-08-27 2009-08-27 Apparatus for preventing partial over-cooling of hot-rolled steel sheet KR20110022336A (en)

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CN102248011A (en) * 2011-06-02 2011-11-23 武汉钢铁(集团)公司 Soft water seal-based flow-guide and drainage device used in after-rolling cooling process of hot-rolled steel strip
CN102909226A (en) * 2012-11-05 2013-02-06 大亚科技股份有限公司 Aluminum foil surface residual oil pretreatment temperature control purging device and use method and application thereof
KR101357558B1 (en) * 2012-04-26 2014-02-12 현대제철 주식회사 Strip surface cleaning device and strip surface cleaning method
CN104438381A (en) * 2014-11-24 2015-03-25 中冶南方工程技术有限公司 Online cleaning system for surface cleaning and squeezing device for metal plate strip

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102248011A (en) * 2011-06-02 2011-11-23 武汉钢铁(集团)公司 Soft water seal-based flow-guide and drainage device used in after-rolling cooling process of hot-rolled steel strip
KR101357558B1 (en) * 2012-04-26 2014-02-12 현대제철 주식회사 Strip surface cleaning device and strip surface cleaning method
CN102909226A (en) * 2012-11-05 2013-02-06 大亚科技股份有限公司 Aluminum foil surface residual oil pretreatment temperature control purging device and use method and application thereof
CN104438381A (en) * 2014-11-24 2015-03-25 中冶南方工程技术有限公司 Online cleaning system for surface cleaning and squeezing device for metal plate strip

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