KR20200052668A - Coil steel plate continuous heat treatment apparatus - Google Patents

Coil steel plate continuous heat treatment apparatus Download PDF

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Publication number
KR20200052668A
KR20200052668A KR1020180135916A KR20180135916A KR20200052668A KR 20200052668 A KR20200052668 A KR 20200052668A KR 1020180135916 A KR1020180135916 A KR 1020180135916A KR 20180135916 A KR20180135916 A KR 20180135916A KR 20200052668 A KR20200052668 A KR 20200052668A
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South Korea
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coil steel
steel plate
steel sheet
coil
oil
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KR1020180135916A
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Korean (ko)
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진덕수
김기환
하재혁
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대홍코스텍 주식회사
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Priority to KR1020180135916A priority Critical patent/KR20200052668A/en
Publication of KR20200052668A publication Critical patent/KR20200052668A/en

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/58—Oils
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/78—Combined heat-treatments not provided for above
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0062—Heat-treating apparatus with a cooling or quenching zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2261/00—Machining or cutting being involved
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

The present invention relates to an apparatus for performing continuous heat treatment on a coil steel plate and, more specifically, to an apparatus for performing continuous heat treatment on a coil steel plate, capable of minimizing deformation generated during a continuous heat treatment process on a coil steel plate. According to the present invention, the apparatus for performing continuous heat treatment on a coil steel plate comprises: an uncoiler; a first cutter; a welding machine; a tension pad; a dancer roll; a quenching induction heater; a quenching temperature maintenance furnace; an oil cooler; an oil removing wiper; an oil washer; a tempering induction heater; a heating surface plate; a tempering temperature maintenance furnace; a leveler; an air cooler; a bridle roll; a second cutter; and a recoiler.

Description

코일강판 연속열처리장치 {COIL STEEL PLATE CONTINUOUS HEAT TREATMENT APPARATUS }Coil steel sheet continuous heat treatment device {COIL STEEL PLATE CONTINUOUS HEAT TREATMENT APPARATUS}

본 발명은 코일강판 연속열처리장치에 관한 것으로, 더 자세하게는 언코일러에서 코일강판을 풀어내어 담금질(Quenching)과 뜨임(Tempering) 열처리를 연속적으로 수행하고 다시 리코일러로 되감는 코일강판 연속열처리장치에 관한 것이다.The present invention relates to a coil steel sheet continuous heat treatment device, and more specifically, to unwind the coil steel sheet by performing a quenching (Quenching) and tempering (Tempering) heat treatment continuously, and then back to the coil steel sheet continuous heat treatment device It is about.

일반적으로 자동차용 부품소재로 사용되는 0.6 ~ 3.2㎜ 두께의 강판은, 프레스 금형에 맞는 크기로 절단한 후 프레스 성형을 통해 자동차용 부품으로 제조된다.In general, a steel sheet having a thickness of 0.6 to 3.2 mm, which is used as a material for automobile parts, is cut into a size suitable for a press mold and then manufactured into automobile parts through press molding.

상기 프레스 성형을 마친 자동차용 부품은 그에 요구되는 강도, 경도, 내마모성, 내충격성, 가공성, 자성 등의 기계적 성질을 만족시키기 위하여 담금질(Quenching)과 뜨임(Tempering)의 열처리를 하게 된다.The automotive parts after the press molding is subjected to heat treatment of quenching and tempering to satisfy mechanical properties such as strength, hardness, abrasion resistance, impact resistance, workability, and magnetism required for the press.

열처리라 함은 금속 재료를 융점 이하의 온도로 가열하고 냉각속도를 선택적으로 가감하여 필요로 하는 조직 및 성질을 갖게 하는 가열 및 냉각의 조작이며, 담금질(Quenching)과 뜨임(Tempering), 노말라이징 등이 있다.Heat treatment is the operation of heating and cooling that heats the metal material to a temperature below the melting point and selectively modulates the cooling rate to obtain the required structure and properties. Quenching, tempering, normalizing, etc. There is this.

이러한 열처리중에서 담금질(Quenching)인 가열 및 급냉과정 후 다시 가열하여 공냉시키는 뜨임(Tempering)이 각각 수행하여야 하는데 이러한 단속적 열처리과정은 생산성이 크게 저하되는 단점이 있다.Among these heat treatments, quenching, heating and quenching, and then reheating and air cooling must be performed, respectively. This intermittent heat treatment has a disadvantage in that productivity is greatly reduced.

또한 프레스에 의하여 성형된 자동차용 부품을 열처리로에 장입 후 가열하고 가열된 부품을 딥핑(Dipping)하여 냉각하는 방법으로는 변형이 심한 상태가 되어 교정하기 어려운 문제점과, 그에 따른 여러 가지 비용과 시간 손실을 초래하는 문제점을 내포하고 있다.In addition, the method of charging the automobile parts molded by the press into a heat treatment furnace, heating them, and dipping the cooled parts to cool them causes severe deformation, making it difficult to correct, and various costs and time. It has the problem of causing loss.

하기의 특허문헌 1에는 선박용, 일반 및 용접구조용, 보일러 및 압력용기용, 라인 파이프용, 내후 및 내식강 등의 용도로 사용되는 고장력 및 고강도용 강판 또는 강관으로 사용되기 위한 후판의 연속 열처리 장치가 제시되어 있다.Patent Document 1 below includes a continuous heat treatment device for a high-strength and high-strength steel plate or a steel pipe used for ships, general and welded structures, boilers and pressure vessels, line pipes, weather and corrosion resistant steels. Is presented.

특허문헌 1의 후판의 연속 열처리 장치는 후판을 연속 유도가열 소입로를 통해 가하고, 가열된 후판을 냉각시켜 담금질(Quenching)한 후, 이송장치를 통해 연속 유도가열 뜨임(Tempering)로에 장입하여 뜨임(Tempering)을 행함으로써 후판을 연속적으로 열처리하여 생산성이 향상되고, 균일한 가열을 통해 양호한 조직과 기계적 성질을 향상시키며, 상/하부 이송 롤러를 통해 변형을 방지하며, 또한 후판의 용도에 맞게 연속 유도가열에 의하여 불림 공정과 풀림 공정 등의 연속 열처리 작업도 가능하도록 한다.In the continuous heat treatment apparatus of the thick plate of Patent Document 1, the thick plate is added through a continuous induction heating quenching furnace, and the heated thick plate is cooled and quenched, and then charged into a continuous induction heating tempering furnace through a transfer device to be tempered ( Tempering) improves productivity by continuously heat-treating the thick plate, improves good structure and mechanical properties through uniform heating, prevents deformation through the upper / lower transfer roller, and also continuously induces it to suit the purpose of the thick plate. By heating, continuous heat treatment operations such as soaking and annealing are also possible.

그러나 특허문헌 1의 후판의 연속 열처리 장치는 6㎜ 이상의 비교적 두꺼운 두께와 25m 정도의 긴 길이를 갖는 후판을 열처리하기 위한 것으로 연속적인 담금질(Quenching) 및 뜨임(Tempering)에 의하여 발생되는 변형을 예방하거나 교정하지 않는다.However, the continuous heat treatment device of the thick plate of Patent Document 1 is for heat treatment of a thick plate having a relatively thick thickness of 6 mm or more and a long length of about 25 m, or to prevent deformation caused by continuous quenching and tempering. Do not correct.

또한 유도가열기 코일측에 전류를 통전시켜 자계를 발생시키고 후판측에 자계에 따른 유도전류를 발생시켜 줄열에 의하여 가열을 하므로 표피층과 내부 중심부와의 온도 편차가 발생한다.In addition, since a current is applied to the coil side of the induction heater, a magnetic field is generated, and an induction current according to the magnetic field is generated on the back plate side, and heating is performed by Joule heat.

이에 본 출원인은 코일강판을 공급하는 언코일러와 열처리된 코일강판을 되감는 리코일러 사이에 담금질(Quenching)과 뜨임(Tempering)을 연속적으로 수행하는 담금질부, 뜨임부, 공냉기를 배치하고, 담금질부 장력조정부와 장력조절용 텐션패드에 의하여 담금질이 수행되는 담금질부의 장력을 제어하고, 장력조절용 텐션패드와 뜨임부 장력조정부에 의하여 뜨임이 수행되는 뜨임부의 장력을 제어하는 코일강판의 연속열처리장치를 제안한 바 있다.(특허문헌 2)Accordingly, the applicant has placed a quenching part, a tempering part, and an air cooler to continuously perform quenching and tempering between the uncoiler supplying the coil steel sheet and the recoiler rewinding the heat-treated coil steel sheet, and placing the quenching part. Proposed a continuous heat treatment device of the coiled steel sheet to control the tension of the quenching part where quenching is performed by the tension adjusting part and the tension pad for tension adjustment, and to control the tension of the temper part where tempering is performed by the tension pad for tension adjustment and the tension adjusting part for tension adjustment. Bar. (Patent Document 2)

상기 본 출원인의 선출원 코일강판의 연속 열처리장치에 의하면, 0.6 ~ 3.2㎜ 두께의 강판을 가열 및 급냉, 다시 가열하는 연속적인 열처리과정에서 발생되는 폭 방향의 변형을 최소화할 수 있고, 열처리 시간을 단축하고, 가열에 필요한 가열로를 짧게 할 수 있어 연속열처리장치의 전체길이를 줄일 수 있게 된다.According to the present invention, the continuous heat treatment apparatus of the prior application coil steel sheet can minimize deformation in the width direction that occurs in a continuous heat treatment process of heating, quenching, and reheating a steel sheet having a thickness of 0.6 to 3.2 mm, and shortening the heat treatment time. And, it is possible to shorten the heating furnace required for heating, thereby reducing the overall length of the continuous heat treatment device.

대한민국 등록특허공보 제10-0694559호 (2007년 03월 07일 등록)Republic of Korea Registered Patent Publication No. 10-0694559 (registered on March 07, 2007) 대한민국 등록특허공보 제10-1830279호 (2018년 02월 12일 등록)Republic of Korea Registered Patent Publication No. 10-1830279 (registered on February 12, 2018)

본 발명은 종래 기술에 따른 코일강판 연속열처리장치의 문제점을 해결하기 위한 것으로, 그 목적이 0.6 ~ 3.2㎜ 두께 코일강판을 연속적으로 담금질(Quenching)과 뜨임(Tempering)을 수행하면서도 가열과 급냉에 의하여 발생되는 변형을 저감시키고, 유도가열에 의한 급속 가열로 인하여 발생되는 표피층과 내부중심부와의 온도편차를 해소할 수 있도록 하는 코일강판 연속열처리장치를 제공하는 데에 있는 것이다.The present invention is to solve the problems of the continuous heat treatment device for a coiled steel sheet according to the prior art, the purpose of which is to quench (Tenching) and tempering (Tempering) the coiled steel sheet with a thickness of 0.6 to 3.2 mm by heating and quenching. The present invention is to provide a coil steel sheet continuous heat treatment device that reduces deformation and reduces a temperature deviation between the inner layer and the epidermal layer caused by rapid heating by induction heating.

상기한 바와 같은 목적을 달성하기 위하여, 본 발명에 따른 코일강판 연속열처리장치는 로딩된 코일강판을 풀어내어 담금질(Quenching) 열처리부로 이송하는 언코일러; 언코일러의 후방에 설치되고, 선행 코일강판과 후행 코일강판의 용접단면을 형성시키는 제1절단기; 제1절단기의 후방에 설치되고, 선행 코일강판의 후단부와 후행 코일강판의 선단부를 용접하는 용접기; 용접기의 후방에 설치되고, 언코일러와 그 후방에 설치되는 댄서롤 사이의 코일강판에 장력을 부여하는 텐션패드; 텐션패드의 후방에 설치되고, 코일강판에 장력을 부여하는 댄서롤; 댄서롤의 후방에 설치되고, 상온의 코일강판을 500 ~730℃의 온도로 가열하는 담금질 유도가열기; 담금질 유도가열기의 후방에 설치되고, 담금질 유도가열기에서 가열된 코일강판을 1100℃로 추가 가열하는 동시에,안정화시키는 담금질 온도유지로; 담금질 온도유지로의 후방에 설치되고, 담금질 온도로 가열된 코일강판을 급속냉각시키는 오일냉각기; 오일냉각기의 후방에 설치되고, 오일냉각기에서 코일강판을 급속 냉각시키는 데에 사용된 오일을 제거하는 오일제거와이퍼; 오일제거와이퍼의 후방에 설치되고, 코일강판의 표면에 잔류하는 오일을 세척하는 오일세척기; 오일세척기의 후방에 설치되고, 300~500℃의 뜨임온도로 코일강판을 가열하는 뜨임 유도가열기; 뜨임 유도가열기의 후방에 설치되고, 코일강판을 350~500℃의 온도로 가열하면서 평평하게 펴주는 히팅정반; 히팅정반의 후방에 설치되고, 300~500℃의 뜨임온도로 가열된 코일강판을 안정화시키는 뜨임 온도유지로; 뜨임 온도유지로의 후방에 설치되고, 뜨임 가열된 코일강판에 발생된 변형을 교정하는 레벨러; 레벨러의 후방에 설치되고, 뜨임온도로 가열된 코일강판의 표면에 공기를 분사하여 코일강판을 냉각하는 공냉기; 공냉기의 후방에 설치되고, 댄서롤 사이의 코일강판에 인장력을 발생시카는 브라이드롤; 열처리가 완료된 후 리코일러에 되감기는 코일강판을 필요한 길이로 절단하는 제2절단기; 제2절단기의 후방에 설치되고, 열처리과정을 마친 완성된 코일강판을 되감는 리코일러;를 포함하는 것을 특징으로 한다.In order to achieve the above object, the coil steel sheet continuous heat treatment apparatus according to the present invention is an uncoiler that releases the loaded coil steel sheet and transfers it to a quenching heat treatment unit; A first cutter installed at the rear of the uncoiler and forming welding cross sections of the preceding coil steel sheet and the subsequent coil steel sheet; A welding machine installed at the rear of the first cutting machine and welding the rear end of the preceding coil steel sheet and the front end of the trailing coil steel sheet; A tension pad installed on the rear side of the welding machine and applying tension to the coil steel plate between the uncoiler and the dancer roll installed on the rear side; A dancer roll installed at the rear of the tension pad and giving tension to the coil steel sheet; A quenching induction heater installed at the rear of the dancer roll and heating the coil steel sheet at room temperature to a temperature of 500 to 730 ° C; A quenching temperature maintained at the same time as being installed at the back of the quenching induction heater and heating the coiled steel sheet heated in the quenching induction heater to 1100 ° C at the same time, stabilizing; An oil cooler installed at the rear of the quenching temperature maintaining furnace and rapidly cooling the coiled steel sheet heated to the quenching temperature; An oil removal wiper installed at the rear of the oil cooler and removing oil used to rapidly cool the coil steel sheet in the oil cooler; An oil washer installed at the rear of the oil removal wiper and washing oil remaining on the surface of the coil steel sheet; A temper induction heater installed at the rear of the oil washer and heating the coil steel sheet to a tempering temperature of 300 to 500 ° C; A heating platen installed on the rear of the tempering induction heater and flattened while heating the coil steel sheet to a temperature of 350 to 500 ° C; It is installed at the rear of the heating platen, as a tempering temperature maintaining stabilizing the coiled steel sheet heated to a tempering temperature of 300 ~ 500 ℃; A leveler installed at the rear of the tempering temperature maintaining furnace and correcting deformation generated in the temper-heated coiled steel sheet; An air cooler installed at the rear of the leveler to cool the coil steel sheet by spraying air on the surface of the coil steel sheet heated to a tempering temperature; A brid roll installed at the rear of the air cooler and generating tensile force on the coil steel sheet between the dancer rolls; A second cutting machine for cutting the coiled steel sheet rewinding to the recoiler to a required length after the heat treatment is completed; It is characterized in that it comprises a; a recoiler that is installed at the rear of the second cutting machine and rewinds the finished coil steel sheet after the heat treatment process.

본 발명에 따른 코일강판 연속열처리장치는 오일냉각기가 그의 내부를 코일강판이 통과하는 과정에서 다수의 분사노즐을 통해 코일강판의 상단부와 하단부에 오일을 고압 분사하여 코일강판을 급속 냉각하고 담금질 과정에서 발생된 표면산화물을 제거하고, 오일제거와이퍼가 코일강판의 상단면과 하단면에 접촉되는 와이퍼부재를 통해 급속 냉각과정에서 코일강판의 상단면과 하단면에 묻은 오일을 제거하고, 오일세척기가 고압의 세척수를 코일강판의 상단면과 하단면에 분사하는 방식으로 코일강판을 세척하는 것을 특징으로 한다.In the coil steel sheet continuous heat treatment apparatus according to the present invention, the oil cooler rapidly cools the coil steel sheet by rapidly spraying oil to the upper and lower parts of the coil steel sheet through a plurality of spray nozzles in the course of the coil steel sheet passing through the inside of the oil cooler and rapidly cooling and quenching it. Removes surface oxides generated, removes oil from the top and bottom surfaces of the coil steel sheet during rapid cooling through a wiper member where the oil removal wiper contacts the top and bottom surfaces of the coil steel sheet, and the oil cleaner Characterized in that the washing of the coil steel plate by spraying the washing water of the top and bottom surfaces of the coil steel sheet.

본 발명에 따른 코일강판 연속열처리장치는 히팅정반이 히터가 내장된 상부블록과 하부블록 사이에 코일강판을 통과시키면서 다림질방식으로 담금질과정에서 발생된 코일강판의 상하방향 변형을 복원시키는 것을 특징으로 한다.The coil steel sheet continuous heat treatment apparatus according to the present invention is characterized in that the heating platen restores the deformation in the vertical direction of the coil steel sheet generated in the quenching process by ironing while passing the coil steel sheet between the upper block and the lower block with a built-in heater. .

본 발명에 따른 코일강판 연속열처리장치에 의하면, 0.6 ~ 3.2㎜ 두께의 코일강판을 가열 및 급냉, 다시 가열하는 연속적인 열처리과정에서 발생되는 변형을 최소화할 수 있다.According to the apparatus for continuous heat treatment of a coiled steel sheet according to the present invention, it is possible to minimize deformation occurring in a continuous heat treatment process of heating, quenching, and heating the coiled steel sheet having a thickness of 0.6 to 3.2 mm.

본 발명에 따른 코일강판의 연속 열처리장치에 의하면, 담금질 가열된 코일강판을 오일냉각기로 냉각하고, 오일제거와이퍼 및 오일세척기로 오일을 제거 및 세척하는 것에 의해 담금질 냉각효율을 크게 향상시킬 수 있다.According to the continuous heat treatment apparatus of the coil steel sheet according to the present invention, the quenching cooling efficiency can be greatly improved by cooling the coiled steel sheet heated by quenching with an oil cooler and removing and washing oil with an oil removal wiper and an oil washer.

본 발명에 따른 코일강판 연속열처리장치에 의하면, 종전의 프레스 성형 후 열처리시 발생되는 변형되는 문제를 프레스 성형이전에 열처리한 후 성형함으로써 열처리 변형을 프레스 성형전에 해결하고, 프레스이후 추가적인 교정공정을 배제시킬 수 있다.According to the continuous heat treatment apparatus for a coiled steel sheet according to the present invention, the heat transfer deformation is solved before press molding by heat-treating before the press molding and then forming the problem of deformation occurring during heat treatment after the previous press molding, and additional correction processes after press are excluded. I can do it.

본 발명에 따른 코일강판 연속열처리장치에 의하면, 코일강판 상태에서 원하는 기계적 성질을 만족시키도록 열처리됨으로써 프레스 성형후 열처리공정에 의해 발생되는 소재의 재고량을 줄일 수 있어 공정단축에 따른 소재 재고비용을 절감할 수 있다.According to the coil steel sheet continuous heat treatment apparatus according to the present invention, heat treatment is performed to satisfy desired mechanical properties in a coil steel sheet state, thereby reducing the inventory of materials generated by the heat treatment process after press molding, thereby reducing material inventory costs due to process shortening. can do.

본 발명에 따른 코일강판 연속열처리장치에 의하면, 담금질(Quenching)에 의하여 발생된 변형을 뜨임(Tempering) 가열에 의하여 코일강판을 가열시킨 이후 히팅정반을 통해 뜨임온도를 유지하면서 평평하게 펴주게 되므로 열처리 변형을 현저하게 저감할 수 있다.According to the continuous heat treatment apparatus for a coiled steel sheet according to the present invention, the deformation generated by quenching is heated flat by heating the coiled steel sheet by heating by tempering, and then flattening while maintaining the temperature through the heating platen. The deformation can be significantly reduced.

도 1a 및 도 1b는 본 발명에 따른 코일강판 연속열처리장치의 구성을 나타낸 정면도,
도 2는 본 발명에 따른 코일강판 연속열처리장치의 구성을 나타낸 평면도,
도 3은 본 발명에 따른 코일강판 연속열처리장치의 담금질 냉각부위 및 뜨임 가열부위의 정면도.1a and 1b is a front view showing the configuration of a coil steel sheet continuous heat treatment apparatus according to the present invention,
Figure 2 is a plan view showing the configuration of the coil steel sheet continuous heat treatment apparatus according to the present invention,
3 is a front view of the quenching cooling part and the tempering heating part of the continuous heat treatment device for a coil steel sheet according to the present invention.

이하 본 발명에 따른 코일강판 연속열처리장치를 첨부된 도면에 의거하여 상세하게 설명하면 다음과 같다.Hereinafter, a coil steel sheet continuous heat treatment apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

이하에서, "상방", "하방", "전방" 및 "후방" 및 그 외 다른 방향성 용어들은 도면에 도시된 상태를 기준으로 정의한다.Hereinafter, the terms “upper”, “downward”, “frontward” and “rearward” and other directional terms are defined based on the state illustrated in the drawings.

도 1a 및 도 1b는 본 발명에 따른 코일강판 연속열처리장치의 구성을 나타낸 정면도이고, 도 2는 본 발명에 따른 코일강판 연속열처리장치의 구성을 나타낸 평면도이고, 도 3은 본 발명에 따른 코일강판 연속열처리장치의 담금질 냉각부위 및 뜨임 가열부위의 정면도이다.1a and 1b is a front view showing the configuration of a coil steel sheet continuous heat treatment device according to the present invention, FIG. 2 is a plan view showing the configuration of a coil steel sheet continuous heat treatment device according to the present invention, and FIG. 3 is a coil steel sheet according to the present invention. It is a front view of the quenching cooling part and tempering heating part of the continuous heat treatment device.

본 발명에 따른 코일강판 연속열처리장치(100)는 코일형태의 강판을 언코일러에서 풀어내어 담금질(Quenching)과 뜨임(Tempering)의 열처리를 수행하고 열처리 완성된 코일강판을 다시 리코일러에 되감는 장치이다.The coil steel sheet continuous heat treatment apparatus 100 according to the present invention is a device for unwinding a coil-shaped steel sheet from an uncoiler, performing heat treatment of quenching and tempering, and rewinding the finished coil steel sheet back to a recoiler. to be.

본 발명에 따른 코일강판 연속열처리장치(100)는 언코일러(110), 제1절단기(120), 용접기(130), 텐션패드(140), 댄서롤(150), 담금질 유도가열기(160), 담금질 온도유지로(170), 오일냉각기(180), 오일제거와이퍼(190), 오일세척기(200), 뜨임 유도가열기(210), 히팅정반(220), 뜨임 온도유지로(230), 레벨러(240), 공냉기(250), 브라이드롤(260), 제2절단기(270), 리코일러(280)를 포함한다.The coil steel sheet continuous heat treatment apparatus 100 according to the present invention includes an uncoiler 110, a first cutter 120, a welding machine 130, a tension pad 140, a dancer roll 150, and a quenching induction heater 160. , Quenching temperature maintaining furnace 170, oil cooler 180, oil removing wiper 190, oil washing machine 200, tempering induction heater 210, heating platen 220, tempering temperature maintaining furnace 230, It includes a leveler 240, an air cooler 250, a brid roll 260, a second cutter 270, and a recoiler 280.

언코일러(110)는 로딩된 코일강판(P)을 풀어내어 담금질(Quenching) 열처리부로 이송한다.The uncoiler 110 releases the loaded coil steel plate P and transfers it to a quenching heat treatment unit.

제1절단기(120)는 선행 열처리되는 코일강판(P)과 후행 열처리되는 코일강판(P)의 용접단면을 형성시키기 위한 것으로, 언코일러(110)의 후방에 설치된다.The first cutting machine 120 is for forming a weld cross-section of the coil steel sheet (P) to be heat-treated in advance and the coil steel sheet (P) to be heat-treated in advance, and is installed behind the uncoiler (110).

상기에서 언코일러(110)의 후방은 리코일러(230) 쪽을 의미한다.In the above, the rear of the uncoiler 110 means the side of the recoiler 230.

제1절단기(120)는 코일강판(P)의 진행방향과 직각으로 선행 코일강판(P)의 후단부와 후행 코일강판(P)의 선단부를 진행방향과 직각방향으로 절단한다.The first cutting machine 120 cuts the rear end portion of the preceding coil steel plate P and the leading end portion of the trailing coil steel plate P in a direction perpendicular to the traveling direction of the coil steel plate P at a right angle.

용접기(130)는 선행 코일강판(P)의 후단부와 후행 코일강판(P)의 선단부를 용접하여 두 개 이상의 코일강판(P)을 연속해서 열처리할 수 있도록 하는 것으로, 제1절단기(120)의 후방에 설치된다.The welding machine 130 is to be able to continuously heat-treat two or more coil steel plates P by welding the front end portion of the preceding coil steel plate P and the front end portion of the subsequent coil steel plate P, and the first cutting machine 120 It is installed in the rear.

용접기(130)는 서로 겹쳐진 선행 코일강판(P)의 후단부와 후행 코일강판(P)의 선단부를 스폿용접으로 용접하여 연결한다.The welding machine 130 welds and connects the rear end portion of the preceding coil steel plate P and the front end portion of the trailing coil steel plate P, which are overlapped with each other, by spot welding.

텐션패드(140)은 언코일러(110)와 그 후방에 설치되는 댄서롤(150) 사이의 코일강판(P)에 장력을 부여하는 역할을 하는 것으로, 용접기(130)의 후방에 설치된다.The tension pad 140 serves to impart tension to the coil steel plate P between the uncoiler 110 and the dancer roll 150 installed at the rear, and is installed at the rear of the welding machine 130.

댄서롤(150)은 그와 브라이드롤(260)의 사이의 코일강판(P)에 장력을 부여하는 역할을 하는 것으로, 텐션패드(140)의 후방에 설치된다.The dancer roll 150 serves to impart tension to the coil steel plate P between him and the brid roll 260, and is installed at the rear of the tension pad 140.

댄서롤(150)과 브라이드롤(260)의 사이에는 담금질 유도가열기(160), 담금질 온도유지로(170), 오일냉각기(180), 오일제거와이퍼(190), 오일세척기(200), 뜨임 유도가열기(210), 히팅정반(220), 뜨임 온도유지로(230), 레벨러(240), 공냉기(250)가 설치되는데, 담금질(Quenching)을 위하여 상온의 코일강판(P)을 가열하면, 코일강판(P)이 늘어나게 된다.Between the dancer roll 150 and the bridle roll 260, a quenching induction heater 160, a quenching temperature maintaining furnace 170, an oil cooler 180, an oil removing wiper 190, an oil washer 200, tempering An induction heater 210, a heating plate 220, a tempering temperature maintenance furnace 230, a leveler 240, and an air cooler 250 are installed, and the coil steel plate P at normal temperature is heated for quenching. If it is, the coil steel sheet P will increase.

댄서롤(150)은 그와 브라이드롤(260)의 사이에서 담금질부의 가열에 의하여 코일강판(P)의 늘어남으로 인하여 처짐이 발생하여 가열로의 하부을 스치면 코일강판(P)의 하부에 불량이 발생하게 되므로, 담금질(Quenching) 공정에서 가열에 의하여 늘어나는 길이를 수평으로 유지시키도록 코일강판(P)에 장력을 부여하는 기능을 수행한다.The dancer roll 150 sags due to the stretching of the coil steel plate P by heating of the quenching portion between him and the brid roll 260, and when the lower portion of the heating furnace is rubbed, a defect occurs in the lower portion of the coil steel plate P. Therefore, in the quenching process, a function of imparting tension to the coiled steel sheet P is performed to maintain the length increased horizontally by heating.

담금질 유도가열기(160)는 상온의 코일강판(P)을 500 ~730℃의 온도로 예비 가열하는 것으로, 댄서롤(150)의 후방에 설치된다.The quenching induction heater 160 is to preheat the coil steel plate P at room temperature to a temperature of 500 to 730 ° C, and is installed at the rear of the dancer roll 150.

담금질 유도가열기(160)는 코일에 전류를 흘려 자계를 발생시키고, 강판에 자계에 따른 유도전류를 발생시켜 줄열에 의하여 가열하는 유도가열방식으로 코일강판(P)을 급속하게 가열한다The quenching induction heater 160 rapidly generates a magnetic field by passing a current through the coil, and rapidly generates the induction current according to the magnetic field in the steel sheet, thereby rapidly heating the coil steel sheet P by heating using Joule heat.

담금질 온도유지로(170)는 담금질 유도가열기(160)에서 가열된 코일강판(P)을 담금질온도인 1100℃로 추가 가열하고, 담금질온도로 가열된 코일강판(P)을 안정화시키는 역할을 하는 것으로, 담금질 유도가열기(160)의 후방에 설치된다.The quenching temperature holding furnace 170 additionally heats the coiled steel sheet P heated in the quenching induction heater 160 to 1100 ° C, the quenching temperature, and stabilizes the coiled steel sheet P heated to the quenching temperature. That is, it is installed in the back of the quenching induction heater 160.

담금질 유도가열기(160)에서 유도가열되는 강자성체인 코일강판(P)은 유도가열에 의하여 표층부근에 전류가 흘러 강판의 표층에서 발열하게 되고, 이러한 유도가열에 의해서는 코일강판(P)의 표층과 중심부의 온도가 불일치하게 된다.The coiled steel sheet P, which is a ferromagnetic material that is induction heated in the quenching induction heater 160, flows in the vicinity of the surface layer by induction heating to generate heat in the surface layer of the steel sheet, and by such induction heating, the surface layer of the coil steel sheet P The temperature of the core and the core will be inconsistent.

담금질 온도유지로(170)는 담금질 유도가열기(160)에서 유도가열된 코일강판(P)의 복사열을 통해 담금질온도까지 추가 가열하면서 코일강판(P)의 표층과 중심부의 온도를 일치시키고 코일강판(P)의 가열상태를 소정시간 유지시켜 오스테나이드 변태되도록 한다.The quenching temperature maintaining furnace 170 matches the temperature of the surface layer and the center of the coil steel sheet P while heating to the quenching temperature through radiant heat of the coil steel sheet P heated induction by the quenching induction heater 160 to match the temperature of the center layer and the coil steel sheet The heating state of (P) is maintained for a predetermined time so that the austenite is transformed.

오일냉각기(180)는 담금질 온도유지로(170)에서 폭방향 온도편차없이 균일하게 가열되고 표층과 중심부 모두 오스테나이트 변태된 코일강판(P)을 급속냉각시키는 것으로, 담금질 온도유지로(170)의 후방에 설치된다.The oil cooler 180 is to heat the coil steel sheet P, which is uniformly heated in the quench temperature maintaining furnace 170 without a temperature deviation in both width directions and austenite transformed in both the surface layer and the center part, of the quenching temperature maintaining furnace 170 It is installed at the rear.

오일냉각기(180)는 그 내부를 코일강판(P)이 통과하는 과정에서 다수의 분사노즐을 통해 코일강판(P)의 상단부와 하단부에 오일을 고압 분사하여 코일강판(P)을 급속 냉각하고 담금질 과정에서 발생된 표면산화물을 제거한다.The oil cooler 180 rapidly cools and quenches the coil steel plate P by high-pressure injection of oil to the upper and lower parts of the coil steel plate P through a plurality of spray nozzles in the course of passing the coil steel plate P therein. The surface oxide generated in the process is removed.

오일제거와이퍼(190)는 오일냉각기(180)에서 코일강판(P)을 급속 냉각시키는 데에 사용된 오일을 제거하는 부분으로, 오일냉각기(180)의 후방에 설치된다.The oil removal wiper 190 is a part that removes the oil used to rapidly cool the coil steel plate P in the oil cooler 180, and is installed at the rear of the oil cooler 180.

오일제거와이퍼(190)는 코일강판(P)의 상단면과 하단면에 접촉되는 와이퍼부재를 통해 급속 냉각과정에서 코일강판(P)의 상단면과 하단면에 묻은 오일을 제거한다.The oil removal wiper 190 removes oil on the top and bottom surfaces of the coil steel plate P during the rapid cooling process through a wiper member that contacts the top and bottom surfaces of the coil steel plate P.

오일세척기(200)는 오일제거와이퍼(190)를 통해 오일이 제거된 코일강판(P)의 표면에 잔류하는 오일을 세척하는 부분으로, 오일제거와이퍼(180)의 후방에 설치된다.The oil washer 200 is a part for washing the oil remaining on the surface of the coiled steel sheet P from which the oil has been removed through the oil removal wiper 190, and is installed at the rear of the oil removal wiper 180.

오일세척기(200)는 고압의 세척수를 코일강판(P)의 상단면과 하단면에 분사하는 방식으로 코일강판(P)을 세척한다.The oil washer 200 washes the coil steel plate P by spraying high-pressure washing water onto the upper and lower surfaces of the coil steel plate P.

뜨임 유도가열기(210)는 급속냉각된 코일강판(P)의 담금질(Quenching)에 따른 잔류응력을 제거하기 위하여 요구되는 300~500℃의 뜨임온도로 코일강판(P)을 가열하는 것으로, 오일세척기(200)의 후방에 설치된다.Tempering induction heater 210 is to heat the coil steel sheet (P) to a tempering temperature of 300 ~ 500 ℃ required to remove residual stress due to quenching (Quenching) of the rapidly cooled coil steel sheet (P), oil It is installed at the rear of the washing machine 200.

뜨임 유도가열기(210)는 코일에 전류를 흘려 자계를 발생시키고, 강판에 자계에 따른 유도전류를 발생시켜 줄열에 의하여 가열하는 유도가열방식으로 코일강판(P)을 급속하게 가열한다.Tempering induction heater 210 generates a magnetic field by passing a current through the coil, and generates an induction current according to the magnetic field in the steel sheet to rapidly heat the coil steel sheet (P) in an induction heating method that is heated by Joule heat.

히팅정반(220)은 뜨임 유도가열기(210)를 통해 뜨임온도로 가열된 코일강판(P)을 350~500℃의 온도로 가열하면서 평평하게 펴주는 것으로, 뜨임 유도가열기(210)의 후방에 설치된다.The heating plate 220 is flattened while heating the coil steel plate P heated to the tempering temperature to a temperature of 350 to 500 ° C through the tempering induction heater 210, and the rear of the tempering induction heater 210. Is installed in

히팅정반(220)은 히터가 내장된 상부블록과 하부블록 사이에 코일강판(P)을 통과시키면서 다림질방식으로 담금질과정에서 발생된 코일강판(P)의 상하방향 변형을 복원시킨다.The heating plate 220 restores the deformation of the coil steel plate P generated in the quenching process in the vertical direction while passing the coil steel plate P between the upper block and the lower block with a built-in heater.

뜨임 온도유지로(230)는 뜨임 유도가열기(210)를 통해 300~500℃의 뜨임온도로 가열된 코일강판(P)을 안정화시키는 역할을 하는 것으로, 히팅정반(220)의 후방에 설치된다.The tempering temperature maintaining furnace 230 serves to stabilize the coiled steel sheet P heated to a tempering temperature of 300 to 500 ° C through the tempering induction heater 210, and is installed at the rear of the heating plate 220. .

뜨임 온도유지로(230)는 뜨임용 유도가열기(210)에서 뜨임온도로 가열되고 히팅정반(220)을 거치면서 담금질과정의 변형이 복원된 코일강판(P)을 폭방향 온도편차없이 균일하게 가열하고 코일강판(P)의 표층과 중심부 모두 균일한 온도가 되도록 한 상태에서 소정시간 유지시킨다.The tempering temperature holding furnace 230 is uniformly heated to the tempering temperature in the induction heater 210 for tempering, and the coil steel sheet P having undergone the heating process 220 is restored without deterioration in the width direction. Heated and maintained for a predetermined time in a state such that both the surface layer and the center of the coiled steel sheet P are at a uniform temperature.

레벨러(240)는 뜨임 가열된 코일강판(P)에 발생된 상하방향 변형을 교정하는 것으로, 뜨임 온도유지로(230)의 후방에 설치된다.Leveler 240 is to correct the deformation in the vertical direction generated in the tempered coiled steel sheet (P), is installed in the rear of the tempering temperature maintenance furnace (230).

레벨러(240)는 코일강판(P)의 두께에 따른 적정 장력하에서 교정을 하기 때문에 코일강판(P)의 상하방향 변형을 교정하는데 매우 효과적이다.The leveler 240 is very effective in correcting the deformation in the vertical direction of the coiled steel sheet P because it is corrected under an appropriate tension according to the thickness of the coiled steel sheet P.

또한 뜨임 온도유지로(230)을 통과한 코일강판(P)은 뜨임온도인 Ac1 이하, 예를 들면 350 ~500℃ 사이의 온도범위인 고온의 온도에서 레벨링되므로, 변형된 코일강판(P)을 교정하는데 작은 외력만으로도 충분한 교정을 할 수 있다.In addition, the coiled steel sheet P that has passed through the tempering temperature maintaining furnace 230 is leveled at a high temperature that is below the temperature of Ac1, for example, between 350 and 500 ° C, so that the deformed coiled steel sheet P is A small external force is sufficient to calibrate.

공냉기(250)는 코일강판(P)의 표면에 공기를 분사하여 뜨임온도로 가열된 코일강판(P)을 냉각하는 것으로, 레벨러(240)의 후방에 설치된다.The air cooler 250 cools the coiled steel sheet P heated to the tempering temperature by spraying air on the surface of the coiled steel sheet P, and is installed at the rear of the leveler 240.

공냉기(250)는 레벨러(240)에서 교정된 코일강판(P)의 상단면과 하단면에 상온의 공기를 분사시켜 뜨임온도로 가열된 코일강판(P)을 냉각한다.The air cooler 250 cools the coiled steel sheet P heated to the tempering temperature by spraying air at normal temperature to the upper and lower surfaces of the coiled steel sheet P calibrated by the leveler 240.

공냉기(250)에서 분사되는 공기의 온도와 분사압력은 코일강판(P)의 두께, 뜨임온도, 피열처리재인 코일강판(P)의 이송속도 등에 따라 제어된다.The temperature and injection pressure of the air injected from the air cooler 250 are controlled according to the thickness of the coil steel plate P, the tempering temperature, the transfer speed of the coil steel plate P, which is a material to be heat-treated.

브라이드롤(260)은 그와 전술한 댄서롤(150) 사이의 코일강판(P)에 인장력을 발생시켜 담금질과정 및 뜨임과정에서 발생할 수 있는 코일강판(P)의 처짐과 가열과 냉각에 따른 폭방향 변형을 감소시키는 역할을 하는 것으로, 공냉기(250)의 후방에 설치된다.The bread roll 260 generates tension in the coil steel plate P between him and the dancer roll 150 described above, and the width of the coil steel plate P, which may occur during the quenching and tempering process, and the width due to heating and cooling. It serves to reduce the deformation in the direction, it is installed in the rear of the air cooler 250.

제2절단기(270)는 열처리가 완료된 후 리코일러(280)에 되감기는 코일강판(P)을 필요한 길이로 절단하기 위한 것으로, 브라이드롤(260)의 후방에 설치된댜.The second cutting machine 270 is for cutting the coil steel plate P rewinding to the recoiler 280 after the heat treatment is completed to a required length, and is installed at the rear of the brid roll 260.

리코일러(280)는 언코일러(110)에서 풀려서 담금질(Quenching), 뜨임(Tempering)의 열처리과정을 마친 완성된 코일강판(P)을 되감는 것으로, 제2절단기(270)의 후방에 설치된다.The recoiler 280 is rewinded from the uncoiler 110 to rewind the completed coil steel plate P after the heat treatment process of quenching and tempering, and is installed behind the second cutter 270. .

이하에서는 본 발명에 따른 코일강판 연속열처리장치의 코일강판(P)을 언코일러(110)에서 풀어내어 담금질(Quenching)과 뜨임(Tempering)의 열처리를 연속적으로 수행하고, 열처리 완성된 코일강판(P)을 다시 리코일러(280)에 되감는 과정을 연속적으로 수행하는 운전과정을 설명한다.Hereinafter, the coil steel sheet (P) of the continuous heat treatment device of the coil steel sheet according to the present invention is released from the uncoiler 110 to continuously perform heat treatment of quenching and tempering, and the heat-treated coil steel sheet (P ) Will be described again to continuously perform the process of rewinding the recoiler 280 again.

열처리 대상물인 코일강판(P)은 언코일러(110)에 로딩하고, 로딩한 코일강판(P)을 풀어서 코일강판(P)의 선단부를 제1절단기(120)로 절단한다.The coiled steel sheet P, which is an object of heat treatment, is loaded onto the uncoiler 110, and the loaded coil steel sheet P is released to cut the tip of the coil steel sheet P into the first cutter 120.

코일강판(P)의 선단부를 절단하는 이유는 선행 열처리되고 있는 코일강판(P)의 후단부와 용접시켜 연속적으로 코일강판(P)을 열처리 공정으로 공급시키기 위함이다.The reason for cutting the front end portion of the coil steel plate P is to continuously supply the coil steel plate P to the heat treatment process by welding with the rear end portion of the coil steel plate P being heat-treated in advance.

제1절단기(120)에 의해 진행방향의 직각인 폭방향으로 절단된 후행 코일강판(P)의 선단부와 선행 코일강판(P)의 후단부를 겹쳐서 용접기(130)로 용접하면 두 개의 코일강판(P)을 연속해서 열처리할 수 있게 된다.When the first coil 120 is welded with the welding machine 130 by overlapping the leading end of the trailing coil steel sheet P and the trailing end of the preceding coil steel sheet P, which are cut in the width direction perpendicular to the traveling direction, the two coil steel sheets P ) Can be continuously heat treated.

제1절단기(120)와 용접기(130)는 선행 코일강판(P)의 열처리가 마무리되고, 후행 코일강판(P)이 공급될 때에 필요한 구성품이다.The first cutting machine 120 and the welding machine 130 are components required when the heat treatment of the preceding coil steel plate P is completed and the subsequent coil steel plate P is supplied.

선행 코일강판(P)의 후단부와 후행 코일강판(P)의 선단부를 용접한 후 언코일러(110) 및 리코일러(260)를 가동하면 언코일러(110)쪽의 코일강판(P)이 리코일러(260) 쪽으로 이동한다.When the uncoiler 110 and the recoiler 260 are operated after welding the front end portion of the preceding coil steel plate P and the front end portion of the trailing coil steel plate P, the coil steel plate P on the side of the uncoiler 110 is recoiled. It moves toward the sailer 260.

언코일러(110)에 의해 풀린 코일강판(P)은 리코일러(260)에서 되감는 장력에 의해 텐션패드(140)를 통과한다.The coiled steel sheet P released by the uncoiler 110 passes through the tension pad 140 by the tension rewinding in the recoiler 260.

텐션패드(140)는 언코일러(10)와 댄서롤(150)) 사이에 위치되어 언코일러(10)와 댄서롤(150) 사이의 코일강판(P)에 일정한 장력을 부여하는 역할을 수행한다.The tension pad 140 is positioned between the uncoiler 10 and the dancer roll 150 to provide a constant tension to the coil steel plate P between the uncoiler 10 and the dancer roll 150. .

텐션패드(140)를 통과한 코일강판(P)은 댄서롤(150)을 통과하며, 이때 댄서롤(150)은 후속 담금질(Quenching) 공정에서 가열에 의하여 늘어나는 처지는 코일강판(P)을 수평으로 유지시키도록 장력을 부여하는 기능을 수행한다.The coiled steel sheet (P) passing through the tension pad 140 passes through the dancer roll (150), where the dancer roll (150) horizontally sags the coiled steel sheet (P) which is stretched by heating in a subsequent quenching process. It performs the function of applying tension to maintain.

댄서롤(150)을 통과한 코일강판(P)은 담금질 유도가열기(160)를 통과하면서 500 ~730℃의 온도로 급속 가열된다.The coil steel sheet P that has passed through the dancer roll 150 is rapidly heated to a temperature of 500 to 730 ° C. while passing through the quenching induction heater 160.

담금질 유도가열기(160)를 통과하면서 가열된 코일강판(P)은 담금질 온도유지로(170)를 통과하는 과정에서 담금질온도인 1100℃로 가열되고, 통과하는 시간 동안 표층과 중심부를 포함한 각 부위의 온도분포가 균일하게 유지되면서 오스테나이트 변태된다.The coiled steel sheet P heated while passing through the quenching induction heater 160 is heated to a quenching temperature of 1100 ° C in the process of passing through the quenching temperature maintaining path 170, and each part including the surface layer and the center portion during the passing time The austenite is transformed while the temperature distribution of is maintained uniformly.

담금질 온도유지로(170)를 통과한 코일강판(P)은 오일냉각기(180)를 통과하게 되며, 오일냉각기(180)룰 통과하는 과정에서 그의 상단부와 하단부에 고압 분사되는 오일을 통해 급속 냉각되고 표면산화물이 제거된다.The coil steel sheet P that has passed through the quenching temperature maintaining path 170 passes through the oil cooler 180, and is rapidly cooled through oil sprayed at its upper and lower parts in the process of passing through the oil cooler 180. The surface oxide is removed.

오일냉각기(180)를 통과하면서 급속 냉각된 코일강판(P)의 표면에 묻은 오일은 코일강판(P)이 오일냉각기(180)의 후방의 오일제거와이퍼(190) 및 오일세척기(200)를 통과하는 과정에서 제거된다.The oil on the surface of the coiled steel sheet (P) rapidly cooled while passing through the oil cooler (180) passes through the oil removal wiper (190) and the oil washer (200) behind the coiled steel sheet (P). Is removed in the process.

오일세척기(200)를 통해 표면에 잔류하는 오일이 세척된 코일강판(P)은 뜨임 유도가열기(210)를 통과하면서 담금질(Quenching)에 따른 잔류응력을 제거하기 위하여 요구되는 300~500℃의 뜨임온도로 급속 가열된다.The coiled steel sheet (P) on which the oil remaining on the surface is washed through the oil washer 200 passes through the tempering induction heater 210 and is 300 to 500 ° C required to remove residual stress due to quenching. Rapid heating to tempering temperature.

뜨임 유도가열기(210)를 통해 가열된 코일강판(P)은 300~500℃의 뜨임온도가 유지되는 히팅정반(220)을 다림질방식으로 지나면서 담금질과정에서 발생된 변형이 복원된다.The coil steel plate (P) heated through the tempering induction heater 210 passes through the heating plate 220 at which a tempering temperature of 300 to 500 ° C is maintained in an ironing manner, so that deformation generated in the quenching process is restored.

히팅정반(220)을 통과한 코일강판(P)은 뜨임 온도유지로(230)를 통과하는 과정에서 폭방향 온도편차없이 균일하게 뜨임온도로 가열되고 표층과 중심부가 모두 균일한 뜨임온도로 유지된다.The coiled steel sheet P that has passed through the heating plate 220 is uniformly heated to the tempering temperature without a temperature deviation in the width direction in the process of passing through the tempering temperature maintaining path 230, and both the surface layer and the center are maintained at a uniform tempering temperature. .

뜨임 온도유지로(230)를 통과한 코일강판(P)은 뜨임온도로 가열된 상태에서 레벨러(240)를 지나는 동안에 변형이 교정되고, 공냉기(250)를 통과하는 과정에서 냉각되고, 브라이드롤(260)을 통과한 후 리코일러(280)에 되감긴다.The coiled steel sheet (P) that has passed through the tempering temperature maintaining furnace (230) is deformed while passing through the leveler (240) in a state heated to the tempering temperature, cooled in the process of passing through the air cooler (250), and rolls After passing through 260, the recoiler 280 is rewound.

한편, 본 발명에 따른 코일강판 연속열처리장치(100)에서는 브라이드롤(260)과 리코일러(280) 사이에 마련된 제2절단기(270)를 통해서 열처리가 완료된 코일강판(P)을 원하는 길이로 절단할 수 있게 되며, 이때 절단된 선행 코일강판(P)은 리코일(280)에 감아 언로딩하고, 후행 코일강판(P)의 선단부를 리코일러(280)에 장착한다.On the other hand, in the coil steel sheet continuous heat treatment apparatus 100 according to the present invention, the heat-treated coil steel sheet P is cut to a desired length through the second cutter 270 provided between the brid roll 260 and the recoiler 280. It is possible to do this, at this time, the preceding coiled steel sheet P cut is wound around the recoil 280 and unloaded, and the leading end of the trailing coiled steel sheet P is mounted on the recoiler 280.

이상 본 발명자에 의해서 이루어진 발명을 상기 실시 예에 따라 구체적으로 설명하였지만, 본 발명은 상기 실시 예에 한정되는 것은 아니고 그 요지를 이탈하지 않는 범위에서 여러 가지로 변경 가능한 것은 물론이다.Although the invention made by the present inventors has been described in detail according to the above-described embodiments, the present invention is not limited to the above-described embodiments and can be variously changed within a range not departing from the gist thereof.

100 : 코일강판 연속열처리장치 110 : 언코일러
120 : 제1절단기 130 : 용접기
140 : 텐션패드 150 : 댄서롤
160 : 담금질 유도가열기 170 : 담금질 온도유지로
180 : 오일냉각기 190 : 오일제거와이퍼
200 : 오일세척기 210 : 뜨임 유도가열기
220 : 히팅정반 230 : 뜨임 온도유지로
240 : 레벨러 250 : 공냉기
260 : 브라이드롤 270 : 제2절단기
280 : 리코일러100: coil steel sheet continuous heat treatment device 110: uncoiler
120: first cutting machine 130: welding machine
140: tension pad 150: dancer roll
160: quenching induction heater 170: quenching temperature to maintain
180: Oil cooler 190: Oil removal wiper
200: oil washer 210: tempering induction heater
220: heating platen 230: to maintain tempering temperature
240: leveler 250: air cooler
260: brid roll 270: second cutting machine
280: Recoiler

Claims (3)

로딩된 코일강판(P)을 풀어내어 담금질(Quenching) 열처리부로 이송하는 언코일러(110);
언코일러(110)의 후방에 설치되고, 선행 코일강판(P)과 후행 코일강판(P)의 용접단면을 형성시키는 제1절단기(120);
제1절단기(120)의 후방에 설치되고, 선행 코일강판(P)의 후단부와 후행 코일강판(P)의 선단부를 용접하는 용접기(130);
용접기(130)의 후방에 설치되고, 언코일러(110)와 그 후방에 설치되는 댄서롤(150) 사이의 코일강판(P)에 장력을 부여하는 텐션패드(140);
텐션패드(140)의 후방에 설치되고, 코일강판(P)에 장력을 부여하는 댄서롤(150);
댄서롤(150)의 후방에 설치되고, 상온의 코일강판(P)을 500 ~730℃의 온도로 가열하는 담금질 유도가열기(160);
담금질 유도가열기(160)의 후방에 설치되고, 담금질 유도가열기(160)에서 가열된 코일강판(P)을 1100℃로 추가 가열하는 동시에,안정화시키는 담금질 온도유지로(170);
담금질 온도유지로(170)의 후방에 설치되고, 담금질 온도로 가열된 코일강판(P)을 급속냉각시키는 오일냉각기(180);
오일냉각기(180)의 후방에 설치되고, 오일냉각기(180)에서 코일강판(P)을 급속 냉각시키는 데에 사용된 오일을 제거하는 오일제거와이퍼(190);
오일제거와이퍼(180)의 후방에 설치되고, 코일강판(P)의 표면에 잔류하는 오일을 세척하는 오일세척기(200);
오일세척기(200)의 후방에 설치되고, 300~500℃의 뜨임온도로 코일강판(P)을 가열하는 뜨임 유도가열기(210);
뜨임 유도가열기(210)의 후방에 설치되고, 코일강판(P)을 350~500℃의 온도로 가열하면서 평평하게 펴주는 히팅정반(220);
히팅정반(220)의 후방에 설치되고, 300~500℃의 뜨임온도로 가열된 코일강판(P)을 안정화시키는 뜨임 온도유지로(230);
뜨임 온도유지로(230)의 후방에 설치되고, 뜨임 가열된 코일강판(P)에 발생된 변형을 교정하는 레벨러(240);
레벨러(240)의 후방에 설치되고, 뜨임온도로 가열된 코일강판(P)의 표면에 공기를 분사하여 코일강판(P)을 냉각하는 공냉기(250);
공냉기(250)의 후방에 설치되고, 댄서롤(150) 사이의 코일강판(P)에 인장력을 발생시카는 브라이드롤(260);
열처리가 완료된 후 리코일러(280)에 되감기는 코일강판(P)을 필요한 길이로 절단하는 제2절단기(270);
제2절단기(270)의 후방에 설치되고, 열처리과정을 마친 완성된 코일강판(P)을 되감는 리코일러(280);를 포함하는 것을 특징으로 하는 코일강판 연속열처리장치.An uncoiler 110 that releases the loaded coil steel sheet P and transfers it to a quenching heat treatment unit;
A first cutter 120 installed at the rear of the uncoiler 110 to form welding cross sections of the preceding coil steel sheet P and the trailing coil steel sheet P;
A welding machine 130 installed at the rear of the first cutting machine 120 and welding the rear end portion of the preceding coil steel plate P and the front end portion of the trailing coil steel plate P;
A tension pad 140 installed at the rear of the welding machine 130 and imparting tension to the coil steel plate P between the uncoiler 110 and the dancer roll 150 installed at the rear thereof;
A dancer roll 150 installed on the rear side of the tension pad 140 and applying tension to the coil steel plate P;
A quenching induction heater 160 installed at the rear of the dancer roll 150 and heating the coil steel plate P at normal temperature to a temperature of 500 to 730 ° C;
A quenching temperature maintaining furnace 170 installed at the rear of the quenching induction heater 160 and simultaneously heating and stabilizing the coiled steel sheet P heated in the quenching induction heater 160 to 1100 ° C;
An oil cooler 180 installed at the rear of the quenching temperature maintaining furnace 170 and rapidly cooling the coiled steel sheet P heated to the quenching temperature;
An oil removal wiper 190 installed at the rear of the oil cooler 180 and removing oil used to rapidly cool the coil steel plate P in the oil cooler 180;
An oil washer 200 installed at the rear of the oil removal wiper 180 and washing the oil remaining on the surface of the coil steel plate P;
A temper induction heater 210 installed at the rear of the oil washer 200 and heating the coil steel sheet P to a tempering temperature of 300 to 500 ° C;
A heating platen 220 installed at the rear of the tempering induction heater 210 and flattened while heating the coil steel plate P to a temperature of 350 to 500 ° C;
A tempering temperature maintenance furnace 230 installed at the rear of the heating plate 220 and stabilizing the coiled steel sheet P heated to a tempering temperature of 300 to 500 ° C;
A leveler 240 installed at the rear of the tempering temperature maintaining furnace 230 and correcting deformation generated in the temper-heated coiled steel sheet P;
An air cooler 250 installed at the rear of the leveler 240 and cooling air to the coil steel plate P by spraying air on the surface of the coil steel plate P heated to a tempering temperature;
A brid roll 260 installed at the rear of the air cooler 250 and generating tensile force on the coil steel plate P between the dancer rolls 150;
A second cutting machine 270 for cutting the coil steel plate P rewinding to the recoiler 280 to a required length after the heat treatment is completed;
Recoiler 280 installed on the rear of the second cutting machine 270 and rewinding the completed coil steel plate P after the heat treatment process is completed. 제1항에 있어서,
오일냉각기(180)는 그의 내부를 코일강판(P)이 통과하는 과정에서 다수의 분사노즐을 통해 코일강판(P)의 상단부와 하단부에 오일을 고압 분사하여 코일강판(P)을 급속 냉각하고 담금질 과정에서 발생된 표면산화물을 제거하고,
오일제거와이퍼(190)는 코일강판(P)의 상단면과 하단면에 접촉되는 와이퍼부재를 통해 급속 냉각과정에서 코일강판(P)의 상단면과 하단면에 묻은 오일을 제거하고,
오일세척기(200)는 고압의 세척수를 코일강판(P)의 상단면과 하단면에 분사하는 방식으로 코일강판(P)을 세척하는 것을 특징으로 하는 코일강판 연속열처리장치.According to claim 1,
The oil cooler 180 rapidly cools and quenches the coil steel plate P by high-pressure injection of oil to the upper and lower parts of the coil steel plate P through a plurality of injection nozzles in the course of passing the coil steel plate P therein. Remove the surface oxide generated in the process,
The oil removal wiper 190 removes oil from the top and bottom surfaces of the coil steel plate P during the rapid cooling process through a wiper member that contacts the top and bottom surfaces of the coil steel plate P,
The oil washer 200 is a coil steel sheet continuous heat treatment device characterized in that the coil steel sheet (P) is washed by spraying high-pressure washing water onto the upper and lower surfaces of the coil steel sheet (P). 제1항에 있어서,
히팅정반(220)은 히터가 내장된 상부블록과 하부블록 사이에 코일강판(P)을 통과시키면서 다림질방식으로 담금질과정에서 발생된 코일강판(P)의 상하방향 변형을 복원시키는 것을 특징으로 하는 코일강판 연속열처리장치.According to claim 1,
The heating plate 220 is a coil characterized by restoring the deformation in the vertical direction of the coil steel plate (P) generated in the quenching process by passing the coil steel plate (P) between the upper block and the lower block with a built-in heater. Steel plate continuous heat treatment device.
KR1020180135916A 2018-11-07 2018-11-07 Coil steel plate continuous heat treatment apparatus KR20200052668A (en)

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CN112251580A (en) * 2020-09-23 2021-01-22 扬州志程机械锻造有限公司 Heat treatment process of high-carbon cold-work die steel
CN113275309A (en) * 2021-07-23 2021-08-20 海安县石油科研仪器有限公司 Environment-friendly multifunctional efficient rock core oil washing instrument
CN113458181A (en) * 2021-09-06 2021-10-01 新乡职业技术学院 Automatic flattening device of new forms of energy battery utmost point ear
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CN112251580A (en) * 2020-09-23 2021-01-22 扬州志程机械锻造有限公司 Heat treatment process of high-carbon cold-work die steel
CN112251580B (en) * 2020-09-23 2022-05-24 扬州志程机械锻造有限公司 Heat treatment process of high-carbon cold-work die steel
CN113275309A (en) * 2021-07-23 2021-08-20 海安县石油科研仪器有限公司 Environment-friendly multifunctional efficient rock core oil washing instrument
CN113458181A (en) * 2021-09-06 2021-10-01 新乡职业技术学院 Automatic flattening device of new forms of energy battery utmost point ear
CN113458181B (en) * 2021-09-06 2021-11-16 新乡职业技术学院 Automatic flattening device of new forms of energy battery utmost point ear
CN113894159A (en) * 2021-09-30 2022-01-07 中冶赛迪上海工程技术有限公司 Hot-rolled strip steel heat treatment processing method
WO2024036987A1 (en) * 2022-08-19 2024-02-22 中冶南方工程技术有限公司 Multifunctional heat treatment production system for high-strength steel plate/strip and method

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