KR970001550B1 - Method and equipment for producing hot rolled steel strip particularly from material continuously cast into strip form - Google Patents

Method and equipment for producing hot rolled steel strip particularly from material continuously cast into strip form Download PDF

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KR970001550B1
KR970001550B1 KR1019930021671A KR930021671A KR970001550B1 KR 970001550 B1 KR970001550 B1 KR 970001550B1 KR 1019930021671 A KR1019930021671 A KR 1019930021671A KR 930021671 A KR930021671 A KR 930021671A KR 970001550 B1 KR970001550 B1 KR 970001550B1
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rolling
heat
finishing
recrystallization
strip
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KR940008781A (en
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발트 빌프레트
로젠탈 디이터
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에스엠에스 슐레만-지이마크 악티엔게젤샤프트
빌프레트 발트 · 볼프강 로오데
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling

Abstract

The invention relates to a method and an installation for the production of hot-rolled steel strip from continuously cast material, preferably thin slabs with working steps of a CSP method taking place in succession at the same temperature, the thin slabs leaving a soaking furnace being heatable to temperatures above the maximum temperature achievable in the soaking furnace, the thin slabs being left a sufficient time to recrystallise after the roughing pass, and the thin slabs then being cooled to the rolling temperature for the finishing train.

Description

연속주조된 대상 예비재로부터 열간 압연된 강대를 제조하기 위한 방법 및 설비Method and equipment for manufacturing hot rolled steel strip from continuous precast material

제1도는 본 발명에 의한 1열-CSP-설비의 약시 측면도이다.1 is a schematic side view of a single row-CSP installation according to the present invention.

제2도는 제1도의 평면도이다.2 is a plan view of FIG.

제3도는 본 발명에 의한 2열-CSP-설비의 약시 평면도이다.3 is a schematic plan view of a two-row CSP plant according to the invention.

제4도는 제3도와는 다른 2열-CSP-설비의 약시 평면도이다.FIG. 4 is a low-profile view of a two-column-CSP installation different from FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 연속주조기 2,5 : 재단기1: Continuous casting machine 2,5: Cutting machine

3 : 박슬랩 4 : 균열로3: thin slab 4: crack

6 : 유도가열기 7 : 신더세정기6: induction heater 7: Sinder cleaner

8 : 조압연(변형)기 9 : 재결정화구역8: crude rolling (deformation) machine 9: recrystallization zone

10 : 권취장치 11 : 해권장치10: take-up device 11: sea-sealing device

12 : 열보존로 13 : 냉각장치12: heat preservation furnace 13: cooling device

14 : 다듬질열 15 : 냉각구역14: finishing heat 15: cooling zone

16 : 권취기 17 : 수송체16: winder 17: transport

18 : 대차 19 : 축열로18: balance 19: heat storage furnace

본발명은 CSP 공정의 순차적 고온 작업단계로 연속주조된 예비재 바람직하게는 박슬랩으로부터 열간 압연된 강대를 제조하기 위한 방법 및 장치에 관한 것으로, 예비재는 고화후 소망하는 묶음중량에 해당하는 길이로 분할되고 박슬랩은 균열로내에서 균질화되며 이어서 조압연열에서 조압연(예비압연)되고 다듬질열에서 다름질 압연되고 냉각구역에서 냉각된 뒤 권취기에서 권취된다.The present invention relates to a method and apparatus for manufacturing hot rolled steel strips from continuous slabs, preferably thin slabs, in a sequential high temperature working step of a CSP process, the preliminary material having a length corresponding to a desired bundle weight after solidification. The thin slabs are homogenized in the cracking furnace, followed by co-rolling (pre-rolling) in coarse rolling, ironing in finishing heat, cooling in the cooling zone and winding up in the winder.

그러한 방법 및 그런 장치는 예컨대 DE40 09 860 A1에 의해 알려져 있다. 그러나 이 개념에 의하면 각종의 강에 대해 온도조절된 압연이 요구되고 따라서 그런 여러강이 제한적으로만 제조될 수 있음이 드러났다. 특히 각종의 강을 위해서는 첫번째(압연) 통과전에는 가능한 최고 균열로 온도 이상의 온도가 또한 두번째 통과전에는 분명히 낮은 온도가 요구되므로 이 개념에 따라서는 각종의 강이 소망하는 최종두께와 최종압연온도가 되도록 융통성있게 압연될 수 없다.Such a method and such a device are known for example by DE40 09 860 A1. This concept, however, has revealed that temperature controlled rolling is required for various steels and that such steels can only be manufactured in a limited manner. Especially for various steels, the highest crack possible before the first (rolling) pass, and the temperature above the temperature is clearly required before the second pass, so according to this concept, the various steels have the desired final thickness and the final rolling temperature. Cannot be rolled.

본 발명은, 모든 공지의 각종 강이 절대적으로(완전히) 융통성있게 압연될 수 있도록 열간압연된 강대의 제조방법 및 장치를 철저히 개량하는 것이 그 목적이다.It is an object of the present invention to thoroughly improve the manufacturing method and apparatus of a hot rolled steel strip so that all known various steels can be rolled absolutely (completely) flexibly.

이 목적은 방법의 경우에는 특허청구의 범위 제1항의 특징에 의해 달성될 수 있다. 단계 1에 의해, 여태까지의 가능한 각종의 강뿐만 아니라, 예컨대 로울러, 그의 베어링 및 구동장치의 내열성에 의해 결정되는 균열로의 최고온도를 초과하는 온도가 조변형기(예비압연기)내로의 첫번째 통과시 요구되는 그런 종류의 강도 압연 될 수 있다.This object can be achieved in the case of a method by the features of claim 1. By step 1, on the first pass into the transforming machine (preliminary rolling mill), not only the various possible steels up to now, but also the temperatures exceeding the maximum temperatures to the cracks determined by the heat resistance of the rollers, bearings and drives thereof. Such kind of strength can be rolled as required.

단계 2에 의해 압밀되지 않고 응력제거된 재료가 다듬질열에 공급될 수 있도록 하는 최적 조직양태가 가능하다. 이런 조직은 압연재의 재료에 따라 재결정화구역에서의 체류시간을 다르게 조정함에 의해 얻어질 수 있다.An optimal tissue configuration is possible which allows the unconsolidated and stressed material by step 2 to be supplied to the finishing heat. This structure can be obtained by adjusting the residence time in the recrystallization zone differently depending on the material of the rolled material.

단계 3에 의해, 다듬질열에 있어 첫번째 통과의 온도가, 압연기술적 관점에 따른 다듬질열 내 필요한 온도경과에 상응하도록 모든 종류의 강에 대해 최적하게 조절될 수 있는 것이 보장된다.By step 3 it is ensured that the temperature of the first pass in the finishing heat can be optimally adjusted for all kinds of steels to correspond to the required temperature regime in the finishing heat according to the rolling technical point of view.

특허청구의 범위 제2항의 특징에 의해 재결정화구역을 공간적으로 크게 연장시키지 않고도 이 구역 내에서의 체류시간이 길게 될 수 있므려, 제6항에 의한 열보존로로 인해 선행 유니트를 정지시킬 필요없이 다듬질열의 단기간 보수작업이 또한 가능하다.It is necessary to stop the preceding unit due to the heat preservation according to claim 6, because the residence time in this zone can be lengthened without significantly extending the recrystallization zone spatially by the characteristics of claim 2 Short term repair work of the finishing heat is also possible without.

본 발명의 목적은 장치의 경우 제3항의 특징에 의해 해결된다.The object of the invention is solved by the features of claim 3 in the case of a device.

제4항의 특징에 의해, 압연재는 단시간내 신속히 가열될 수 있고, 따라서 전후 압연재의 질이 갑자기 변해도 아무 문제가 생기지 않는다.By the feature of claim 4, the rolled material can be heated quickly in a short time, so that even if the quality of the rolled material before and after changes suddenly, no problem occurs.

높은 생산량으로 CSP-설비를 운전하려는 경우에는, 알려져 있는 바와 같이 한 압연열에 평행비치된 두 대의 주조기를 작동되게 할 것이 추천된다. 이 경우에는 뒤에 배설된 설비성분에 압연재를 교대로 공급할 수 있는 수송체를 가열장치와 균열로 사이에 설치하는 것이 유효하다. 이 때 뒤에 오는 압연열이 한 주조기 및 균열로와 직선상에 배치될 경우에는, 수송체뒤에 다시 추가의 한 균열로를 배설하는 것이 유리하다는 것이 밝혀졌다.If a CSP plant is to be operated at high yields, it is recommended to operate two casting machines parallelly arranged in one rolling row, as is known. In this case, it is effective to provide a transport body between the heating apparatus and the crack furnace that can alternately supply the rolled material to the equipment components disposed behind. It has now been found that if the following heat of rolling is arranged in a straight line with one casting machine and the crack furnace, it is advantageous to excrete another crack furnace behind the vehicle again.

본 발명을 이하 도면에 따라 상세히 설명한다.The present invention will be described in detail below with reference to the drawings.

제1도에는 연속주조기(1)가 표시되어 있으며 이 주조기의 뒤에는 연속주도된 형재를 소망하는 코일(묶음)중량에 상당하는 박슬랩(3)으로 절단하기 위한 재단기(가위)(2)가 배설되어 있다. 재단기(2)에 균열로(4)가 연결되어 있고 균열로 다음에는 추가의 재단기(5)가 있다.In FIG. 1, a continuous casting machine 1 is shown, and behind this casting machine, a cutting machine (scissors) 2 for cutting the continuous driven shape into thin slabs 3 corresponding to a desired coil (bundling) weight is disposed. It is. A cracking furnace 4 is connected to the cutting machine 2 and there is an additional cutting machine 5 next to the cracking furnace.

거기에는 요구에 따라 균열로(4)로부터 배출된 박슬랩(3)을 1150℃ 이상의 온도까지 가열할 수 있는 유도가 열기(6)가 연결되어 있다. 유도가열기(6)는 신더 세정기(cinder washer; 이하, '신더'란 금속용해로 등에서 나오는 쇠찌꺼기를 의미함)(7) 및 여기서는 조변형기(8)로 되어 있는 조압연열에 이여져 있고 그 다음에는 재결정화구역(9)이 있다. 재결정화구역(9)에는 권취장치(10)와 해권장치(11), 예컨대 코일박스가 배설되어 있다. 권취장치(10)와 해권장치(11)의 옆에는 열보존로(12)가 배치되어 있고, 이 노안에서는 경우에 따라 완전히 권취된 코일이 임시 저장 및 재결정화를 위해 저류될 수 있다.There, the induction heating apparatus 6 which can heat the thin slab 3 discharged | emitted from the crack furnace 4 to the temperature of 1150 degreeC or more as needed is connected. The induction heater 6 is connected to a roughing sequence consisting of a cinder washer (hereafter referred to as 'cinder'), which is here referred to as a metal melting furnace (7) and here a modulator (8). Has a recrystallization zone (9). The recrystallization zone 9 is provided with a winding device 10 and a sea winding device 11, for example, a coil box. A heat preservation path 12 is disposed next to the take-up device 10 and the sea-sealing device 11, and in this presbyopia, a fully coiled coil may be stored for temporary storage and recrystallization in some cases.

해권장치(11) 뒤 압연방향으로 냉각장치(13)가 있는데 이 장치에 의해 압연스트립은 후속하는 다듬질열(14)을 위한 최적온도로 냉각될 수 있고 경우에 따라서는 신더가 제거될 수 있다. 다듬질열(14)에는 다시 냉각구역(15) 그리고 권취기(16)가 연결되어 있다.There is a cooling device 13 in the rolling direction behind the unwinding device 11 whereby the rolling strip can be cooled to an optimum temperature for the subsequent finishing heat 14 and in some cases the xander can be removed. The finishing heat 14 is again connected to the cooling zone 15 and the winder 16.

열간 압연된 강대를 제조하기 위한 본 발명의 장치는 다음과 같이 작동한다.The apparatus of the present invention for producing hot rolled steel strips operates as follows.

연속주조기(1)에서 박슬랩(3)이 연속적을 주조되고, 재단기(2)에 의하여 소정의 코일(묶음) 중량에 해당되는 길이로 절단된다. 상기 절단된 박슬랩은 균열로(4)에 도달되고 이를 통하여 균질화된다. 균열로(4)에서 최고 온도는 1150℃로 조절된다. 만약 압연되는 강의 종류가 조변형기의 첫번째 통과 전에 고운을 필요로 하면, 균열로(4)에서 배출된 후의 해당 박슬랩(3)은 유도가열기(6)에 의하여 1150℃이상의 온도에 도달될 수 있다. 이 가열공정에 이어서, 필요한 경우 박슬랩(3)은 신더세정기(7)에서 표면의 신더가 제거되며, 조변형기(8)에서 조압연되고, 재결정화구역(9)내에서 재결정이 완료될 때까지 유지된다.In the continuous casting machine 1, the thin slab 3 is continuously cast and cut by the cutting machine 2 into a length corresponding to a predetermined coil (bundling) weight. The cut thin slab reaches the crack furnace 4 and is homogenized through it. The maximum temperature in the crack furnace 4 is adjusted to 1150 ° C. If the type of steel being rolled requires fineness before the first pass of the transducer, the thin slab 3 after exiting the crack furnace 4 can be reached at temperatures above 1150 ° C by the induction heater 6. have. Following this heating process, if necessary, the thin slab 3 is removed from the surface of the thinner cleaner 7, roughly rolled in the transforming machine 8, and when recrystallization is completed in the recrystallization zone 9. Maintained until.

재결정화된 후 박슬랩의 조스트립은 냉각장치(13)에서 최종 압연온도가 되고, 다듬질열(14)에서 다듬질 압연되며, 냉각구역(15)에서 냉각된 후 스트립은 권취기(6)에 의하여 권취된다.After recrystallization, the jaw strip of the thin slab is brought to the final rolling temperature in the cooling device 13, is finished rolling in the finishing heat 14, and after being cooled in the cooling zone 15, the strip is wound by the winder 6 It is wound up.

제3도는 두 대의 평행배열된 연속주조기(1,1'), 두 재단기(2,2') 및 두 균열로(4,4')를 보여준다. 균열로(4,4')에는 수송체(17)가 이어져 있고 그 수송체는 대차(18)를 갖고 있다. 대차(18)에 의해 박슬랩(3,3')은 균열로(4,4')로부터 교대로 압연라인으로 이송될 수 있다.3 shows two parallelly arranged continuous casting machines 1, 1 ', two cutting machines 2, 2' and two cracking furnaces 4, 4 '. A carrier 17 is connected to the crack furnaces 4 and 4 ', and the carrier has a truck 18. By the trolley 18, the thin slabs 3 and 3 'can be alternately transferred from the crack furnaces 4 and 4' to the rolling line.

제4도는. 연속주조기(1'), 재단기(2') 및 균열로(4')는 압연열과 직선상에 배치되어 있는 한편 연속주조기(1), 재단기(2) 및 균열로(4)는 거기에 평행으로 압연라인 바깥 쪽에 배치되어 있는 것을 보여준다. 여기서도 수송체(17)는 압연라인에 압연재를 교대로 공급하는 역할을 한다. 계속하여 조조공정과 압연공정이 확실하게 행해지도록 하기 위해 수송체(17) 뒤에는 축열로(19)가 있는대, 축열로는 가열될 수도 또는 가열되지 않을 수도 있으며 압연열과 직선상에 배치되어 있다.4 is. The continuous casting machine 1 ', the cutting machine 2' and the crack furnace 4 'are arranged in a straight line with the heat of rolling, while the continuous casting machine 1, the cutting machine 2 and the crack furnace 4 are parallel thereto. It is located outside the rolling line. Here too, the transporter 17 serves to alternately supply the rolling material to the rolling line. In order to reliably carry out the roughening step and the rolling step, there is a heat storage path 19 behind the transport body 17. The heat storage furnace may or may not be heated, and is arranged in a straight line with the heat of rolling.

Claims (7)

예비재는 고화후 소망하는 묶음(코일) 중량에 해당하는 길이로 분할되고, 박슬랩은 균열로내에서 균질화되고, 이어서 조압연열에서 조압연되고, 다듬질열에서 다듬질 압연되고, 냉각구역에서 냉각된 뒤 권취기에서 권취되는, CSP-공정의 순차적 열간작업단계에 의해 연속주조된 예비재로부터 열간압연된 강대를 제조하는 방법에 있어서, 1. 균질하에 이어 그리고 첫번째 조압연 통과전에 박슬랩을 1150℃이상의 온도로 가열하고, 2. 박슬랩을 조압연하고 이어서 재결정화하며, 3. 조압연된 스트립(강대)을 다듬질열을 위한 압연온도까지 냉각하고 이어서 다듬질 압연하는 단계를 포함하는 것을 특징으로 하는 방법.The preliminary material is divided into lengths corresponding to the desired bundle (coil) weights after solidification, and the thin slab is homogenized in the cracking furnace, followed by co-rolling in roughing heat, finishing rolling in finishing heat, and cooling in the cooling zone. A method for producing a hot rolled strip from a continuously cast preliminary material by a sequential hot working step of a CSP-process, wound in a subsequent winder, comprising: 1. 1150 ° C. thin slab after homogeneous and before the first rough rolling pass Heating to the above temperature, 2. roughly rolling the thin slab and then recrystallizing, 3. cooling the roughly rolled strip to a rolling temperature for finishing heat and then finishing rolling. Way. 제1항에 있어서, 재결정화를 위해 조압연된 스트립을 권취하고 경우에 따라서는 열보존로내에 임시 저류하며, 재결정화에 이어 스트립을 다시 해권하고(풀고) 냉각되게 하는 것을 특징으로 하는 방법.The method of claim 1, wherein the roughly rolled strip is wound up for recrystallization and optionally stored temporarily in a heat preservation furnace, and the strip is then defrosted (unwinded) and cooled again after recrystallization. 적어도 하나의 연속주조기, 적어도 하나의 재단기, 적어도 하나의 균열로, 조압연열, 다듬질열, 냉각구역 및 권취기를 가지고 제1항 또는 제2항에 의한 방법을 실시하기 위해 열간 압연된 강대를 제조하는 장치에 있어서, -균열로(4,4')와 조압연열의 첫번째 압연기(8)의 사이에 가열장치(6)가 배설되어 있는 것, -조압연열(8) 다음에 재결정화구역(9)이 배치되어 있는 것, 및 - 다음질열(14)의 첫번째 압연기 앞에 냉각장치(13)가 배치되어 것을 특징으로 하는 장치.Manufacture a hot rolled steel strip with at least one continuous casting machine, at least one cutting machine, at least one crack, with a roughing sequence, a finishing heat, a cooling zone and a winder for carrying out the method according to claim 1 or 2. In the apparatus, the heating apparatus 6 is disposed between the cracking furnaces 4 and 4 'and the first rolling mill 8 of the coarse rolling, and the recrystallization zone after the coarse rolling 8 9) arranged, and-a cooling device (13) arranged in front of the first rolling mill of the next vaginal row (14). 제3항에 있어서, 상기 가열장치가 유도가열기(6)인 것을 특징으로 하는 장치.4. Device according to claim 3, characterized in that the heating device is an induction heater (6). 제3항에 있어서, 재결정화구역(9)에는 권취장치(10)와 해권장치(11)가 배설되어 있는 것을 특징으로 하는 장치.4. An apparatus as claimed in claim 3, wherein the recrystallization zone (9) is provided with a winding device (10) and a sea winding device (11). 제5항에 있어서, 재결정화구역(9)에는 열보존로(12)가 할당배치되어 있는 것을 특징으로 하는 장치.6. An apparatus according to claim 5, characterized in that the recrystallization zone (9) is assigned a heat preservation passage (12). 제3항 내지 제6항 중의 어느 한 항에 있어서, 다수의 평행배치된 주조기, 재단기 및 균열로를 갖고 있으며, 균열로(4,4')와 가열장치(6) 사이에 수송체(17)가 배설되어 있고 그 수송체의 뒤에는 경우에 따라 축열로(19)가 배치되어 있는 것을 특징으로 하는 장치.7. The transporter (17) according to any one of claims 3 to 6, having a number of parallelly placed casting machines, cutting machines and cracking furnaces, wherein the transporter (17) is between the cracking furnaces (4, 4 ') and the heating device (6). Is arranged, and the heat storage furnace (19) is arrange | positioned at the back of the conveyance depending on a case.
KR1019930021671A 1992-10-28 1993-10-19 Method and equipment for producing hot rolled steel strip particularly from material continuously cast into strip form KR970001550B1 (en)

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DE59301206D1 (en) 1996-02-01
EP0595282B2 (en) 2002-01-02

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