JP2006021246A - Equipment for manufacturing high-strength hot-rolled steel sheet - Google Patents

Equipment for manufacturing high-strength hot-rolled steel sheet Download PDF

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JP2006021246A
JP2006021246A JP2004368753A JP2004368753A JP2006021246A JP 2006021246 A JP2006021246 A JP 2006021246A JP 2004368753 A JP2004368753 A JP 2004368753A JP 2004368753 A JP2004368753 A JP 2004368753A JP 2006021246 A JP2006021246 A JP 2006021246A
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hot
rolled steel
steel sheet
facility
equipment
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Takanori Shimizu
孝宣 清水
Kanji Hayashi
寛治 林
Kazuhiro Nishiyama
和宏 西山
Satoshi Akamatsu
聡 赤松
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Nippon Steel Corp
Primetals Technologies Holdings Ltd
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Nippon Steel Corp
Mitsubishi Hitachi Metals Machinery Inc
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<P>PROBLEM TO BE SOLVED: To provide a manufacturing equipment of a high-strength hot-rolled steel sheet and a thin hot-rolled steel sheet with which the steel sheet excellent in surface property, geometry and internal structure and having good quality is manufactured stably, efficiently and inexpensively by applying a thin slab continuous casting/hot charge hot-rolling process. <P>SOLUTION: This equipment is a manufacturing equipment of a hot-rolled steel sheet which is provided with a continuous casting machine for casting the thin slab, tunnel furnace which is arranged on the outlet side of the continuous casting machine and provided with a roller table for conveying the thin slab and a heating device for heating and soaking the thin slab, descaling device, hot-rolling mill, rapid cooling system, near winding equipment consisting of a high-speed shear and switching coiler which is usable as or switchable to an air-cooling zone, slow cooling system or rapid cooling system and remote winding equipment and can be used as the manufacturing equipment of the high-strength hot-rolled steel sheet and the thin hot-rolled steel sheet. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、連続鋳造機で得られた３０〜１００ｍｍ厚の薄スラブ（鋳片）を熱間圧延機に直送して熱間圧延し、得られた鋼板を制御冷却して巻き取る連続鋳造−直送圧延による高強度熱延鋼板製造設備に関するものである。   The present invention is a continuous casting in which a thin slab (slab) having a thickness of 30 to 100 mm obtained by a continuous casting machine is directly sent to a hot rolling mill and hot-rolled, and the obtained steel sheet is controlled and cooled. The present invention relates to equipment for producing high-strength hot-rolled steel sheets by direct rolling.

近年、例えば鉄鋼の分野においては、鋼板を製造する場合に、工程省略による生産性の向上、設備コストおよび熱原単位の低減等の観点から、薄スラブ連続鋳造−熱間圧延、熱処理（制御冷却）、巻き取り工程等を連続させた薄スラブ連鋳直送熱延プロセス（ＴＳＣＲ）が広く採用されている。
この薄スラブ連鋳直送熱延プロセスとしては、概念的には、例えば、図６に示すように、連続鋳造機２１の下流側に、連続鋳造機２１からの温度が約１０００℃の薄スラブ２２（厚み３０〜１００ｍｍ）を、ローラテーブル２３を備えたトンネル炉２４（加熱・均熱炉）で搬送しながら約１１００℃に均一加熱してから、デスケーリング装置２５で表面を清浄化後に連続熱間圧延機２６で圧延して、厚み１．２〜１２．７ｍｍ程度の熱延鋼板を製造し、熱処理（冷却装置２７による制御冷却）をし、巻き取り設備２８にて巻き取って、鋼板コイルとして製品化するものが知られている。 In recent years, in the field of steel, for example, when manufacturing steel sheets, thin slab continuous casting-hot rolling, heat treatment (controlled cooling) from the viewpoint of improving productivity by omitting processes, reducing equipment costs and heat intensity, etc. ), A thin slab continuous casting direct feed hot rolling process (TSCR) in which a winding process and the like are continued is widely adopted.
As this thin slab continuous casting direct feed hot rolling process, conceptually, for example, as shown in FIG. 6, a thin slab 22 having a temperature from the continuous casting machine 21 of about 1000 ° C. is provided downstream of the continuous casting machine 21. (Thickness 30 to 100 mm) is uniformly heated to about 1100 ° C. while being conveyed by a tunnel furnace 24 (heating / soaking furnace) equipped with a roller table 23, and then continuously heated after the surface is cleaned by a descaling device 25. A hot rolled steel sheet having a thickness of about 1.2 to 12.7 mm is manufactured by rolling with a cold rolling mill 26, heat treated (controlled cooling by the cooling device 27), wound by a winding equipment 28, and a steel sheet coil Is known as a product.

この薄スラブ連鋳直送熱延プロセスにおいては、
（１）薄スラブ鋳造において凝固組織を緻密化できる。
（２）析出強化型高張力鋼板に活用されるＴｉ、Ｎｂ、Ｖ等の合金が、従来法、即ち、スラブ連続鋳造・スラブ冷却・加熱炉によるスラブ再加熱による場合には、スラブ冷却過程において粗大析出するため、再加熱時に再溶体化のために高温加熱が必須であるのに対して、溶体化のまま圧延されるため、高温加熱することなく合金成分の有効活用ができることから、高張力鋼板の製造に適している。
（３）さらに、温度履歴特性については、鋳造後の高温（約１０００℃）の薄スラブをトンネル炉に導入し短時間の若干の加熱で、全長全幅均一な温度（約１１００℃）に保定でき、即圧延するために、従来の再加熱の場合に比較し圧延して得られる熱延鋼板の温度も均一であり、コイル全長全幅に渡って均一な材質が確保できる。
ことなどが知られている。 In this thin slab continuous casting direct feed hot rolling process,
(1) The solidified structure can be densified in thin slab casting.
(2) In the case where the alloy such as Ti, Nb, V, etc. utilized for the precipitation strengthening type high strength steel sheet is a conventional method, that is, slab reheating by slab continuous casting / slab cooling / heating furnace, Since high-temperature heating is essential for re-solutionization during reheating because of coarse precipitation, it is rolled while in solution, so the alloy components can be effectively used without high-temperature heating, so high tension Suitable for manufacturing steel sheets.
(3) Furthermore, with regard to the temperature history characteristics, a thin slab of high temperature (about 1000 ° C) after casting is introduced into the tunnel furnace and can be held at a uniform temperature (about 1100 ° C) over the entire length by slightly heating for a short time. In order to perform rolling immediately, the temperature of the hot-rolled steel sheet obtained by rolling is uniform compared to the case of conventional reheating, and a uniform material can be secured over the entire length of the coil.
That is known.

一方、熱延鋼板の孔広げ性と高張力を両立させる「高バーリング性高張力鋼板」などの組織強化型高張力鋼板の製造方法としては、通常、適正成分と（高温再加熱＋冷却制御）による製造方法が広く論じられているが、（１）、（２）項記載の合金成分の有効活用や（３）項記載の均一な材質という観点で、製造対象の熱延鋼板に対応した効率的設備配置を考慮する必要があり、このプロセス技術の確立というところまでは至っていないのが実態である。
なお、上記（３）の「高バーリング性高張力鋼板」の従来の製造プロセスは、概略、
１）合金の再溶体化のための「高温加熱」（再加熱）、２）Ａｒ3変態以上の仕上げ温度確保、３）ＲＯＴ（ランナウトテーブル）冷却（即冷却＋途中空冷＋後段冷却）等の制御冷却からなっている。 On the other hand, as a manufacturing method of structure-strengthened high-tensile steel sheets such as “high-burring high-tensile steel sheet” that achieves both the hole-expandability and high tensile strength of hot-rolled steel sheets, the proper components are usually used (high-temperature reheating + cooling control). Although the manufacturing method according to (1) and (2) is effectively discussed, the efficiency corresponding to the hot-rolled steel sheet to be manufactured from the viewpoint of the effective use of the alloy components described in (1) and (2) and the uniform material described in (3). The actual situation is that the establishment of this process technology has not been reached.
In addition, the conventional manufacturing process of the “high burring high-tensile steel plate” in (3) above is roughly
1) “High-temperature heating” (reheating) for re-solubilization of alloys, 2) Securing of finishing temperature above Ar 3 transformation, 3) ROT (runout table) cooling (immediate cooling + mid-air cooling + subsequent cooling), etc. It consists of controlled cooling.

「高バーリング性高張力鋼板」を得るための熱間圧延後のＲＯＴ制御冷却については、例えば、
Ａ．熱間仕上圧延後の鋼帯を５℃／ｓ以上の冷却速度で５５０〜７５０℃の温度範囲に冷却し、この温度範囲で１秒以上中間保持する工程と、中間保持後の鋼帯を５℃／ｓ以上の冷却速度で冷却し、３００〜５５０℃の温度範囲に巻き取る工程を有するフェライト＋ベイナイト組織を有する高張力熱延鋼帯の製造方法（特許文献１参照）。
Ｂ．後段冷却後の巻取温度は、＜５００℃が中心であるが、この領域はいわゆる遷移沸騰域であり、不安定な冷却ゾーンになるために、冷却制御精度が不安定になる懸念がある熱間仕上圧延機出側のランナウトテーブルに設けた鋼帯表裏面の冷却装置による冷却において、鋼帯表裏面の温度が５００℃以下の温度域においては５０〜３００ｌ／分・ｍ2の水量密度で冷却する鋼帯の冷却方法（特許文献２参照）。
等の開示がある。 For ROT controlled cooling after hot rolling to obtain a “high burring high strength steel plate”, for example,
A. The steel strip after hot finish rolling is cooled to a temperature range of 550 to 750 ° C. at a cooling rate of 5 ° C./s or more, and the steel strip after intermediate holding is 5 A method for producing a high-tensile hot-rolled steel strip having a ferrite + bainite structure having a step of cooling at a cooling rate of ° C / s or higher and winding up in a temperature range of 300 to 550 ° C (see Patent Document 1).
B. The coiling temperature after the latter stage cooling is mainly <500 ° C., but this region is a so-called transition boiling region, and since it becomes an unstable cooling zone, there is a concern that the cooling control accuracy may become unstable. In the cooling by the cooling device for the front and back surfaces of the steel strip provided on the run-out table on the outlet side of the finishing mill, the water density of 50 to 300 l / min · m 2 in the temperature range of the steel strip front and back surfaces is 500 ° C or lower. A method for cooling a steel strip to be cooled (see Patent Document 2).
Etc. are disclosed.

特開２０００-８７１４２号公報JP 2000-87142 A 特開平５-２７７５４２号公報JP-A-5-277542

本発明は前述した薄スラブ連鋳直送熱延プロセス（以下「ＴＳＣＲプロセス」という。）における従来の設備構成に加えて、厚みが１．２〜０．７ｍｍレベルの薄物熱延鋼板の製造にも適した冷却・巻き取り設備を付与して更に、特に高強度熱延鋼板の製造に適用してＴＳＣＲプロセスとしてのメリットを最大限に発揮でき、表面性状と形状寸法および内部組織の優れた品質の良好なストリップを安定して効率よく、低コストで製造できる連続鋳造−直送圧延設備による高強度熱延鋼板製造設備を提供するものである。   In addition to the conventional equipment configuration in the above-described thin slab continuous direct feed hot-rolling process (hereinafter referred to as “TSCR process”), the present invention is also used for manufacturing thin hot-rolled steel sheets with a thickness of 1.2 to 0.7 mm. Appropriate cooling and winding facilities are provided, and it can be applied to the production of high-strength hot-rolled steel sheets to maximize the benefits of the TSCR process. The present invention provides a high-strength hot-rolled steel sheet manufacturing facility using a continuous casting-direct feed rolling facility that can manufacture a good strip stably and efficiently at a low cost.

本発明は、以下の（１）〜（６）を要旨とするものである。
（１）薄スラブ連続鋳造−直送圧延設備による熱延鋼板製造設備であって、薄スラブを鋳造する連続鋳造機と、連続鋳造機の出側に配置し、薄スラブを搬送するローラテーブルと薄スラブを加熱・均熱する加熱装置とを備えたトンネル炉と、このトンネル炉に後続して配置したデスケーリング装置と、このデスケーリング装置に後続して配置した熱間圧延機群と、この熱間圧延機に後続して配置した急冷却設備と、この急冷却設備に後続して配置し、空冷ゾーンに兼用、若しくは、切替え可能であり、高速シャー及び切替えコイラからなる近方巻取設備と、近方巻取設備に後続して配置した緩冷却設備と、この緩冷却設備に後続して配置した遠方巻取設備とを備えたことを特徴とする熱延鋼板製造設備。
（２）薄スラブ連続鋳造−直送圧延設備による熱延鋼板製造設備であって、薄スラブを鋳造する連続鋳造機と、連続鋳造機の出側に配置し、薄スラブを搬送するローラテーブルと薄スラブを加熱・均熱する加熱装置とを備えたトンネル炉と、このトンネル炉に後続して配置したデスケーリング装置と、このデスケーリング装置に後続して配置した熱間圧延機群と、この熱間圧延機に後続して配置した急冷却設備と、この急冷却設備に後続して配置し、空冷ゾーンに兼用、若しくは、切替え可能であり、高速シャー及び切替えコイラからなる近方巻取設備と、この近方巻取設備に後続して配置した他の急冷却設備と、この他の急冷却設備に後続して配置した遠方巻取設備とを備えたことを特徴とする熱延鋼板製造設備。
（３）（１）または（２）において、薄物熱延鋼板を製造する場合には、熱間圧延機後の急冷却設備と、高速シャー及び近接切替えコイラを備えた近方巻取設備とを使用することを特徴とする熱延鋼板製造設備。
（４）（１）または（２）において、高強度熱延鋼板を製造する場合には、熱間圧延機後の急冷却設備と、空冷ゾーンと、緩冷却設備または他の急冷却設備と、遠方巻取設備とを使用することを特徴とする熱延鋼板製造設備。
（５）（１）乃至（４）いずれかにおいて、熱間圧延機群を複数に分割配置すると共に、分割された熱間圧延機群の間に、保熱、加熱装置又は冷却装置を配置することを特徴とする熱延鋼板製造設備。
（６）（５）において、分割された熱間圧延機群の各々の入り側に、デスケーリング装置を配置することを特徴とする熱延鋼板製造設備。 The gist of the present invention is the following (1) to (6).
(1) Thin slab continuous casting-hot-rolled steel sheet manufacturing equipment using direct feed rolling equipment, a continuous casting machine for casting a thin slab, a roller table disposed on the outlet side of the continuous casting machine, and carrying a thin slab A tunnel furnace equipped with a heating device for heating and soaking the slab, a descaling device arranged subsequent to the tunnel furnace, a hot rolling mill group arranged subsequent to the descaling device, and the heat A rapid cooling facility arranged subsequent to the inter-rolling mill, and a near winding facility which is arranged subsequent to the rapid cooling facility and can be used as an air-cooling zone or can be switched, and comprises a high-speed shear and a switching coiler. A hot-rolled steel sheet manufacturing facility comprising: a slow cooling facility disposed following the near winding facility; and a far winding facility disposed subsequent to the slow cooling facility.
(2) Thin slab continuous casting-hot-rolled steel sheet manufacturing equipment using direct feed rolling equipment, a continuous casting machine that casts thin slabs, and a roller table that is placed on the outlet side of the continuous casting machine and transports thin slabs A tunnel furnace equipped with a heating device for heating and soaking the slab, a descaling device arranged subsequent to the tunnel furnace, a hot rolling mill group arranged subsequent to the descaling device, and the heat A rapid cooling facility arranged subsequent to the inter-rolling mill, and a near winding facility which is arranged subsequent to the rapid cooling facility and can be used as an air-cooling zone or can be switched, and comprises a high-speed shear and a switching coiler. A hot-rolled steel sheet manufacturing facility comprising: another rapid cooling facility disposed subsequent to the near winding facility; and a remote winding facility disposed subsequent to the other rapid cooling facility .
(3) In (1) or (2), when manufacturing a thin hot-rolled steel sheet, a rapid cooling facility after the hot rolling mill and a near winding facility equipped with a high-speed shear and a proximity switching coiler A hot-rolled steel sheet manufacturing facility characterized by being used.
(4) In (1) or (2), when producing a high-strength hot-rolled steel sheet, a rapid cooling facility after the hot rolling mill, an air cooling zone, a slow cooling facility or other rapid cooling facility, A hot-rolled steel sheet manufacturing facility characterized by using a remote winding facility.
(5) In any one of (1) to (4), the hot rolling mill group is divided and arranged in plural, and a heat retaining, heating device or cooling device is arranged between the divided hot rolling mill groups. A hot-rolled steel sheet manufacturing facility characterized by that.
(6) A hot-rolled steel sheet manufacturing facility, wherein a descaling device is arranged on each entry side of the divided hot rolling mill group in (5).

本発明の熱延鋼板製造設備は、高強度熱延鋼板を製造する場合に適用して顕著な効果を奏するものであり、連続鋳造機−直送熱間圧延による省資源、低コストの実現とともに、高強度熱延鋼板を得るために必要な、例えばＴｉ、Ｎｂ、Ｖなどの合金成分を溶解化したまま圧延するため、高温再加熱することなく、合金成分効果をより効率的に活用できることから、合金成分を少なくでき低コストで溶接性能に優れた高強度熱延鋼板を製造できる。
また、トンネル炉、デスケーリング効果で熱間圧延機に導入される薄スラブを全長全幅にわたって均一な温度で、かつ表面性状、形状特性を良好にして熱間圧延機に導入でき、また、圧延後に適正な冷却・巻取温度制御することができることから、表面性状、形状特性、材質特性のバラツキが極めて少なく、品質が良好であり、高い歩留まりを実現できる高強度熱延鋼板も製造することが可能になる。
上記の高強度熱延鋼板の製造の他に、一般熱延鋼板はもとより、厚みが０．７〜１．２ｍｍレベルの薄物熱延鋼板の製造も可能である。 The hot-rolled steel sheet manufacturing equipment of the present invention has a remarkable effect when applied to the production of high-strength hot-rolled steel sheets, with resource saving by continuous casting machine-direct hot rolling, and low cost, In order to roll the alloy components such as Ti, Nb, and V necessary for obtaining a high-strength hot-rolled steel sheet while being dissolved, the alloy component effects can be utilized more efficiently without reheating at a high temperature. High strength hot-rolled steel sheets with low alloying cost and excellent welding performance can be produced.
In addition, thin slabs introduced into a hot rolling mill due to a tunnel furnace and descaling effect can be introduced into a hot rolling mill at a uniform temperature over the entire length, with good surface properties and shape characteristics, and after rolling. Appropriate cooling and coiling temperatures can be controlled, so it is possible to produce high-strength hot-rolled steel sheets with extremely low variations in surface properties, shape characteristics, and material characteristics, good quality, and high yield. become.
In addition to the production of the above-described high-strength hot-rolled steel sheet, not only general hot-rolled steel sheets but also thin hot-rolled steel sheets having a thickness of 0.7 to 1.2 mm can be produced.

本発明は、連続鋳造機で鋳造した３０〜１００ｍｍの薄スラブ（温度は約１０００℃）を、トンネル炉で搬送疵や加熱ムラが発生し難いローラテーブルで搬送しながら温度約１１００℃に加熱・均熱して、全長全幅を均一温度にし、デスケーリングにより表面を清浄化（表面清浄を阻害する有害スケール除去）後、熱間圧延機で熱間圧延した後に、高強度熱延鋼板と高強度熱延鋼板以外の薄物熱延鋼板として要求される諸特性、例えば溶接特性、表面性状、形状特性、材質特性などを安定確保する冷却・巻き取りを実現するための設備配置に特徴を有するものであり、高強度熱延鋼板または薄物熱延鋼板の製造設備として兼用できるものである。   In the present invention, a 30 to 100 mm thin slab (temperature is about 1000 ° C.) cast by a continuous casting machine is heated to a temperature of about 1100 ° C. while being transported by a roller table, which is less likely to cause uneven transporting and heating in a tunnel furnace. After uniform heating, the entire length of the entire width is made uniform, and the surface is cleaned by descaling (removal of harmful scale that hinders surface cleaning), and after hot rolling with a hot rolling mill, high strength hot rolled steel sheet and high strength heat It has features in equipment layout to realize cooling and winding that ensures stable characteristics such as welding characteristics, surface properties, shape characteristics, material characteristics, etc. required as thin hot rolled steel sheets other than rolled steel sheets It can also be used as a manufacturing facility for high-strength hot-rolled steel sheets or thin hot-rolled steel sheets.

本発明の熱延鋼板製造設備は、高強度熱延鋼板または高強度熱延鋼板以外の薄物熱延鋼板の製造設備として兼用可能な設備配置を有するものであり、図１に示すように、薄スラブ２を鋳造する連続鋳造機１と、連続鋳造機１の出側に配置した、薄スラブ２を搬送するローラテーブル３と薄スラブを加熱・均熱する加熱装置４とを備えたトンネル炉５と、このトンネル炉５に後続して配置したデスケーリング装置６と、このデスケーリング装置６に後続して配置した熱間圧延機７群と、この熱間圧延機７群に後続して配置した近方急冷却設備８と、この近方急冷却設備８に後続して配置し、空冷ゾーン１１に兼用可能又は切替え可能であり、高速シャー９と切替えコイラ１０ａ、１０ｂとからなる近方巻取設備１２と、近方巻取設備１２に後続して配置したラミナー等緩冷却設備１３と、このラミナー等緩冷却設備１３に後続して配置した遠方巻取設備１４を備えたものである。
また、図２は、図１において、近方巻取設備１２に後続するラミナー等緩冷却設備１３に代えて遠方急冷却設備１５を配置し、この遠方急冷却設備１５に後続して遠方巻取設備１４を備えたものであり、遠方急冷却設備１５の配置により、冷却能力を高めて図１の場合より設備長を短縮可能にしたものである。 The hot-rolled steel sheet manufacturing equipment of the present invention has an equipment layout that can also be used as a manufacturing equipment for thin hot-rolled steel sheets other than high-strength hot-rolled steel sheets or high-strength hot-rolled steel sheets. As shown in FIG. A tunnel furnace 5 having a continuous casting machine 1 for casting the slab 2, a roller table 3 for conveying the thin slab 2 and a heating device 4 for heating and soaking the thin slab disposed on the outlet side of the continuous casting machine 1. And a descaling device 6 arranged subsequent to the tunnel furnace 5, a group of hot rolling mills 7 arranged subsequent to the descaling device 6, and a group following the hot rolling mill 7 group. A near-coiling facility 8 and a near-coiling device that is arranged subsequent to the near-instant cooling device 8 and can be used as an air-cooling zone 11 or can be switched, and includes a high-speed shear 9 and switching coils 10a and 10b. Following equipment 12 and near winding equipment 12 A laminar like slow cooling equipment 13 arranged Te, those having a distal winding equipment 14 arranged subsequent to this laminar like slow cooling facility 13.
Further, FIG. 2 shows that in FIG. 1, a distant rapid cooling facility 15 is arranged in place of the laminar slow cooling facility 13 following the near winding facility 12, and the distant rapid cooling facility 15 is followed by a distant winding. The equipment 14 is provided, and the distant rapid cooling equipment 15 is arranged so that the cooling capacity is increased and the equipment length can be shortened as compared with the case of FIG.

本発明の熱延鋼板製造設備で熱延鋼板を製造する場合に用いるプロセスフローは、高強度熱延鋼板を製造する場合と薄物熱延鋼板を製造する場合で使い分けるものである。
０．７〜１．２ｍｍ厚の薄物熱延鋼板の製造に用いる場合のプロセスフローは、本発明の熱延鋼板製造設備を薄物熱延鋼板等の一般熱延鋼板の製造に用いる場合のプロセスフローは、概略、以下の通りである。
（１）連続鋳造機１で厚み３０〜１００ｍｍ、温度約１０００℃の薄スラブ２を鋳造し、トンネル炉５に導入する。
（２）トンネル炉５で薄スラブ２をローラテーブル３で搬送しながら加熱装置４で約１１００℃に加熱・均熱して、全長全幅の温度均一化して熱間圧延機７群に導入する。熱間圧延機７群に導入前にデスケーリング装置６で有害スケールを除去して表面を清浄化する。
（３）熱間圧延機７群で薄スラブ２を連続圧延して厚み１．２〜０．７ｍｍの薄物熱延鋼板（温度約８５０〜９５０℃）とする。
（４）圧延直後に近方急冷却設備８で高圧・高流量密度の冷却水による冷却速度５０℃〜５００℃／秒の範囲で冷却（温度５００〜７５０℃）する。
（５）高速シャー９と近接切替えコイラ１０ａ、１０ｂとからなる近方巻取設備１２で巻き取る（巻取温度５００〜７５０℃）。
（５）での近方巻取設備１２は、薄物熱延鋼板の場合の対応、およびセミエンドレス圧延（薄スラブ接合なしの連続圧延）に対応できるように構成されるもので、高速シャー９と近接切替えコイラ１０と図示されていない高速搬送設備（例えばエア噴射方式）で構成される。この高速シャー９は、１２００ｍｐｍ程度の速度で熱延鋼板を切断できるものであり、切断された熱延鋼板の先端と後端は高速搬送設備でフライングやウイービングを起こすことなくコイラーに導入して巻き取ることができる。
フライングやウイービングは、例えばエアによる浮上抑制方法によって抑制できる。
切替えコイラーには、１基のカローゼルコイラー方式と２基のダウンコイラー方式があり、本発明では、いずれのコイラーも用いることができる。ダウンコイラー方式の場合は、コイラー設備上部が通板可能なので、そのまま空冷ゾーンとして使用でき、カローゼルコイラー方式の場合は、退避して空冷ゾーンに切替可能である。 The process flow used when manufacturing a hot-rolled steel sheet with the hot-rolled steel sheet manufacturing facility of the present invention is different depending on whether a high-strength hot-rolled steel sheet is manufactured or a thin hot-rolled steel sheet.
The process flow in the case of using the hot-rolled steel sheet of 0.7 to 1.2 mm thickness for the production of a general hot-rolled steel sheet such as a thin hot-rolled steel sheet is used. The outline is as follows.
(1) A thin slab 2 having a thickness of 30 to 100 mm and a temperature of about 1000 ° C. is cast by the continuous casting machine 1 and introduced into the tunnel furnace 5.
(2) While the thin slab 2 is conveyed by the roller table 3 in the tunnel furnace 5, it is heated and soaked to about 1100 ° C. by the heating device 4, and the temperature of the entire length is made uniform and introduced into the group of hot rolling mills 7. Before introduction into the hot rolling mills 7 group, the descaling device 6 removes harmful scales to clean the surface.
(3) The thin slab 2 is continuously rolled by a group of 7 hot rolling mills to obtain a thin hot-rolled steel sheet having a thickness of 1.2 to 0.7 mm (temperature of about 850 to 950 ° C.).
(4) Immediately after rolling, the near rapid cooling facility 8 is cooled (temperature 500 to 750 ° C.) at a cooling rate of 50 ° C. to 500 ° C./second with high-pressure and high flow density cooling water.
(5) It winds up by the near winding equipment 12 which consists of the high-speed shear 9 and the proximity switching coilers 10a and 10b (winding temperature 500-750 degreeC).
The near-winding equipment 12 in (5) is configured so as to be compatible with the case of a thin hot-rolled steel sheet and semi-endless rolling (continuous rolling without thin slab joining). It is comprised by the proximity switching coiler 10 and the high-speed conveyance equipment (for example, air injection system) which is not illustrated. The high-speed shear 9 can cut a hot-rolled steel sheet at a speed of about 1200 mpm, and the leading and rear ends of the cut hot-rolled steel sheet are introduced into a coiler and wound by a high-speed transfer facility without causing flying or weaving. Can be taken.
Flying and weaving can be suppressed, for example, by a method for suppressing flying by air.
There are one carousel coiler system and two down coiler systems in the switching coiler. In the present invention, any coiler can be used. In the case of the down coiler system, the upper part of the coiler equipment can be passed, so that it can be used as it is as an air cooling zone, and in the case of the carousel coiler system, it can be retracted and switched to the air cooling zone.

本発明の熱延鋼板製造設備を高強度熱延鋼板（本発明でいう高強度熱延鋼板とは、４４０ＭＰａ以上の強度を有する熱延鋼板をいう。）の製造に用いる場合のプロセスフローは、概略、以下の通りである。
（Ｓ１）連続鋳造機１で厚み３０〜１００ｍｍ、温度約１０００℃の薄スラブ２を鋳造し、トンネル炉５に導入する。
（Ｓ２）トンネル炉５で薄スラブ２をローラテーブル３で搬送しながら加熱装置４で約１１００℃に加熱・均熱して、全長全幅の温度均一化して熱間圧延機７群に導入する。熱間圧延機７群に導入前にデスケーリング装置６で有害スケールを除去して表面を清浄化する。
（Ｓ３）熱間圧延機７群で薄スラブ２を連続圧延して熱延鋼板（温度約８５０〜９５０℃）とする。
（Ｓ４）圧延直後に近方急冷却設備８で高圧・高流量密度の冷却水による冷却速度５０℃〜５００℃／秒の範囲で冷却（温度５５０〜７５０℃）する。
（Ｓ５）近方巻取設備１２を冷却ゾーン１１として利用、ＲＯＴ途中で１〜５秒空冷する。
（Ｓ６）空冷ゾーン１１で空冷した後にラミナー等緩冷却設備１３による低流量密度の冷却水、または、遠方急冷却設備１５で高圧・高流量密度の冷却水で冷却速度５０〜５００℃／秒の範囲で冷却（温度３００〜５００℃）後、遠方巻取設備１４で巻き取る。 The process flow in the case of using the hot-rolled steel sheet manufacturing facility of the present invention for manufacturing a high-strength hot-rolled steel sheet (the high-strength hot-rolled steel sheet as used in the present invention refers to a hot-rolled steel sheet having a strength of 440 MPa or more) The outline is as follows.
(S1) The thin slab 2 having a thickness of 30 to 100 mm and a temperature of about 1000 ° C. is cast by the continuous casting machine 1 and introduced into the tunnel furnace 5.
(S2) While the thin slab 2 is conveyed by the roller table 3 in the tunnel furnace 5, it is heated and soaked to about 1100 ° C. by the heating device 4, and the temperature of the entire length is made uniform and introduced into the group of hot rolling machines 7. Before introduction into the hot rolling mills 7 group, the descaling device 6 removes harmful scales to clean the surface.
(S3) The thin slab 2 is continuously rolled by a hot rolling mill 7 group to obtain a hot-rolled steel sheet (temperature of about 850 to 950 ° C.).
(S4) Immediately after rolling, the near rapid cooling facility 8 cools at a cooling rate of 50 ° C. to 500 ° C./second with high-pressure and high flow density cooling water (temperature 550 to 750 ° C.).
(S5) The near winding device 12 is used as the cooling zone 11 and air-cooled for 1 to 5 seconds during the ROT.
(S6) After cooling in the air-cooling zone 11, the cooling rate is 50 to 500 ° C./s with low-flow density cooling water by the slow cooling facility 13 such as laminar or high-pressure and high-flow-density cooling water at the remote rapid cooling facility 15. After cooling in the range (temperature of 300 to 500 ° C.), it is wound up by the far winder 14.

この高強度熱延鋼板を製造する場合には、特に、圧延直後に急冷（冷却速度５０℃〜５００℃／砂）し、ＲＯＴ途中の空冷ゾーン１１で空冷（１〜５秒）してから、緩冷却（５〜５０℃／秒）または急冷却（５０〜５００℃／秒）して、５５０℃〜３００℃のベイナイ卜生成域まで冷却してから巻き巻き取るように、冷却の制御精度を安定確保することが重要である。
このような冷却・巻取を実施することにより、溶接性能に優れ、表面性状、形状特性、材質特性のバラツキが極めて少なく品質の良好な高強度熱延鋼板を高歩留で製造することが可能になる。 When manufacturing this high-strength hot-rolled steel sheet, in particular, immediately after rolling, it is rapidly cooled (cooling rate 50 ° C. to 500 ° C./sand), and air cooled in the air cooling zone 11 in the middle of ROT (1 to 5 seconds). Slow cooling (5-50 ° C / sec) or rapid cooling (50-500 ° C / sec), and cooling to the 550 ° C-300 ° C bainai soot formation area, and then winding the control accuracy. It is important to ensure stability.
By performing such cooling and winding, it is possible to produce high-strength hot-rolled steel sheets with excellent welding performance and excellent quality with very little variation in surface properties, shape characteristics, and material characteristics at high yield. become.

図３は、冷却水による冷却の場合での熱延鋼板温度（℃）と熱伝達係数（ｋｃａｌ／ｈ・ｍ2・℃）との関係を示すものであり、温度域によって冷却水の沸騰形態が異なり、冷却効果に影響する。例えば、６００℃以上の温度域では、熱延鋼板Ｓ上の蒸気膜Ｖが厚く、冷却水（上面水膜）Ｗによる冷却効果が阻害される（図４（ｃ）参照）。２００℃〜５００の温度域では遷移沸騰域で、熱延鋼板Ｓ上の蒸気膜Ｖがやや薄くなるが、蒸気膜厚の変動幅が大きく、冷却水Ｗによる冷却効果が不安定になり、冷却の制御精度が不安定になる（図４（ｂ）参照）。また、２００℃以下の温度域では、核沸騰域で、冷却水Ｗによる冷却効果は高位で安定するため、冷却の制御精度が安定する（図４（ａ）参照）。
そこで、本発明では、３００〜５５０℃の本来遷移沸騰域での冷却精度を向上させるため、２つの方法を用いる。
１つめは、低流量冷却水使用による膜沸騰から遷移沸騰域に変化する温度を下げて冷却する方法である。
もう１つは、水蒸気膜を多点冷却水が強制的に破って見掛け上核沸騰にて冷却する方法である。
これらを実行する方法としては、例えば、通常のラミナー等冷却による低流量密度の安定冷却（緩冷却設備使用）、あるいは高圧・高流量密度による多点核沸騰条件化での安定冷却（急冷却設備使用）が好適である。 FIG. 3 shows the relationship between hot-rolled steel sheet temperature (° C.) and heat transfer coefficient (kcal / h · m 2 · ° C.) in the case of cooling with cooling water. Differ and affect the cooling effect. For example, in the temperature range of 600 ° C. or higher, the vapor film V on the hot-rolled steel sheet S is thick, and the cooling effect by the cooling water (upper surface water film) W is hindered (see FIG. 4C). In the temperature range of 200 ° C to 500 ° C, the vapor film V on the hot-rolled steel sheet S is slightly thinner in the transition boiling region, but the fluctuation range of the vapor film thickness is large, and the cooling effect by the cooling water W becomes unstable and cooling is performed. Becomes unstable (see FIG. 4B). Further, in the temperature range of 200 ° C. or lower, the cooling effect by the cooling water W is stabilized at a high level in the nucleate boiling region, so that the cooling control accuracy is stabilized (see FIG. 4A).
Therefore, in the present invention, two methods are used in order to improve the cooling accuracy in the original transition boiling region of 300 to 550 ° C.
The first is a method of cooling by lowering the temperature that changes from the film boiling to the transition boiling region by using low flow rate cooling water.
The other is a method in which multi-point cooling water is forced to break the water vapor film and apparently cool by nucleate boiling.
As a method for implementing these, for example, stable cooling with low flow density by using ordinary laminar cooling (using a slow cooling facility), or stable cooling under multiple-point nucleate boiling conditions with high pressure and high flow density (rapid cooling facility) Use) is preferred.

圧延直後、近方急冷却設備８で高圧・高流量密度の冷却水により冷却する場合には、この冷却水により熱延鋼板Ｓが変形状態になると冷却が不安定になるので、図５に示すように、ピンチロール１６ａ、１６ｂ間に小径の支持ロール１７を密に配置してスプレーノズル１８により冷却水を表裏両面から噴射したり、若干の張力の付与などを考慮して、熱延鋼板の平坦性を確保したりしながら冷却の安定化を確保する必要がある。
また、遠方巻取直前に遠方急冷却設備１５で高圧・高流量密度の冷却水で冷却する場合にも同様のことを考慮する必要である。 FIG. 5 shows that when the hot-rolled steel sheet S is deformed by the cooling water when the near-cooling equipment 8 is cooled immediately after rolling by the high-pressure / high flow density cooling water, the cooling becomes unstable. As described above, the support roll 17 having a small diameter is densely arranged between the pinch rolls 16a and 16b, and the spray water is sprayed from both the front and back surfaces by the spray nozzle 18. It is necessary to ensure stabilization of cooling while ensuring flatness.
In addition, the same must be taken into consideration when cooling with high-pressure and high flow density cooling water in the remote rapid cooling facility 15 immediately before the remote winding.

なお、本発明の熱延鋼板製造設備で用いる連続鋳造機は、固定鋳型式の連続鋳造機が主体であるが、移動鋳型式（双ロール式、双ベルト式）の連続鋳造機を使用することもできる。
トンネル炉は、薄スラブに搬送疵や加熱ムラを発生する懸念のないローラテーブルを搬送装置として備え、加熱手段として（均熱）温度の制御性が良好で、有害スケールの発生が少なくできるもの、例えば、誘導加熱装置を備え、酸化抑制構造を有するものが好適であるが、通常のガス炊きバーナー炉を用いることもできる。 The continuous casting machine used in the hot-rolled steel sheet manufacturing equipment of the present invention is mainly a fixed mold type continuous casting machine, but a moving mold type (double roll type, twin belt type) continuous casting machine should be used. You can also.
The tunnel furnace is equipped with a roller table that does not have the risk of causing wrinkles and heating unevenness in a thin slab as a conveying device, has good controllability of temperature as a heating means (soaking), and can reduce the generation of harmful scales, For example, an induction heating device having an oxidation suppression structure is suitable, but a normal gas-burning burner furnace can also be used.

図１に示すような本発明の熱間圧延鋼板製造設備で高強度熱延鋼板（フェライト−ベイナイト２相高孔広げ性高強度熱延鋼板）を、概ね、前述した（Ｓ１）〜（Ｓ６）のプロセスフローで製造した。
連続鋳造機１で厚み６０ｍｍ、板幅１３００ｍｍの薄スラブ２を鋳造速度５ｍ／分で連続鋳造し、得られた約１０００℃の薄スラブ２をトンネル炉５で１１００℃に加熱・均熱して、熱間圧延機で板厚２．８ｍｍまで熱間圧延して熱延鋼板Ｓとし、これを近方急冷却設備８で冷却速度１００℃／秒で６００〜７００℃に冷却して、空冷ゾーン１１で３秒空冷後、ラミナー遠方緩冷却設備１２で冷却速度１５℃／秒で、５００℃に冷却し、遠方巻取設備１４で巻き取った。
その結果、板厚も許容公差内に納まっており、表面性状および形状の不良もなく、材質特性が安定し、強度特性も充分に満足できる高強度熱延鋼板（強度５９０ＭＰａ〜７１０ＭＰａ）が得られた。
これに対して、図６に示した通常のＴＳＣＲレイアウトで、一般ラミナー冷却で冷却して巻取設備で巻き取った場合には、巻取温度のバラツキが大きく、形状がやや不安定で、材質特性も不安定であり、強度特性も充分に満足できる高強度熱延鋼板が得られなかった。 The high-strength hot-rolled steel sheet (ferrite-bainite two-phase high-hole-expandability high-strength hot-rolled steel sheet) in the hot rolled steel sheet manufacturing equipment of the present invention as shown in FIG. Manufactured in the process flow.
A continuous slab 2 having a thickness of 60 mm and a plate width of 1300 mm is continuously cast at a casting speed of 5 m / min. The resulting thin slab 2 of about 1000 ° C. is heated and soaked to 1100 ° C. in a tunnel furnace 5, A hot-rolled steel sheet S is hot-rolled to a thickness of 2.8 mm with a hot rolling mill, and is cooled to 600 to 700 ° C. at a cooling rate of 100 ° C./sec with a near-rapid cooling facility 8, and the air-cooling zone 11 And then cooled to 500 ° C. at a cooling rate of 15 ° C./second with a laminar far-cooling facility 12 and wound up with a far-winding facility 14.
As a result, a high-strength hot-rolled steel sheet (strength 590 MPa to 710 MPa) is obtained in which the plate thickness is within acceptable tolerances, there are no surface properties and shape defects, the material properties are stable, and the strength properties are sufficiently satisfactory. It was.
On the other hand, in the normal TSCR layout shown in FIG. 6, when cooled by general laminar cooling and wound up by a winding equipment, the winding temperature varies greatly, the shape is somewhat unstable, and the material The properties were also unstable, and a high-strength hot-rolled steel sheet with sufficient strength properties could not be obtained.

図１、図２における近方冷却設備及び遠方冷却設備は、鋼種により緩冷却を必要とする場合と急冷却を必要とする場合があるが、高品質の材料を生産する場合にはそれぞれ高い冷却精度が要求される。高い冷却精度を要求される場合は、ノズル数の多いラミナー式の冷却装置が最適であるが、従来式のラミナー冷却の場合は緩冷却には適していても、急冷却には不適であった。そこで、急冷却に対応するために、従来ラミナーよりもさらにノズル列を増加することにより、冷却水量を増加させて、高い冷却精度の急冷却を可能としている。また、ノズル列の選択を可能とすることにより、水量の変更が可能となり、緩冷却及び急冷却の双方に適用可能になる。   The near and far cooling facilities in FIGS. 1 and 2 may require slow cooling or rapid cooling depending on the type of steel, but each requires high cooling when producing high quality materials. Accuracy is required. When high cooling accuracy is required, a laminar type cooling device with a large number of nozzles is optimal, but conventional laminar cooling is suitable for slow cooling but not for rapid cooling. . Therefore, in order to cope with rapid cooling, the number of cooling water is increased by increasing the number of nozzle rows as compared with the conventional laminar, thereby enabling rapid cooling with high cooling accuracy. Further, by making it possible to select the nozzle row, it is possible to change the amount of water, and it can be applied to both slow cooling and rapid cooling.

図１、図２では熱間圧延機群をタンデム配置している例を示している。これを、図７のように、第１圧延機群３０、第２圧延機群３１に分割配置することで、各圧延機群３０、３１の間に温度制御装置３２（保熱、加熱装置あるいは中間冷却装置）を配置することができる。この配置によれば、薄物材あるいは高温圧延材の場合は、温度制御装置３２として用いる保熱、加熱装置により高温の圧延材を生産することができる。   1 and 2 show an example in which the hot rolling mill group is arranged in tandem. This is divided into the first rolling mill group 30 and the second rolling mill group 31 as shown in FIG. 7, so that the temperature control device 32 (heat retention, heating device or An intermediate cooling device) can be arranged. According to this arrangement, in the case of a thin material or a high-temperature rolled material, a high-temperature rolled material can be produced by the heat retaining and heating device used as the temperature control device 32.

又、温度制御装置３２として中間冷却装置を使用する場合は、第２圧延機群３１の入り側の材料温度を精度良く制御することができ、中間冷却装置と図１及び図２に示す近方冷却装置及び遠方冷却装置との組み合わせにより、安定して高強度圧延鋼板の製造が可能になる。更に、中間冷却装置の活用により、第２圧延機群３１の入り側温度を低温で精度良く制御できることから、第２圧延機群３１でフェライト域での安定した圧延を行うことが可能になり、近方冷却装置あるいは遠方冷却装置との組み合わせにより、低温脆性の高い高強度材の生産が薄スラブ−直送圧延設備において可能になる。   In addition, when an intermediate cooling device is used as the temperature control device 32, the material temperature on the entry side of the second rolling mill group 31 can be controlled with high accuracy, and the intermediate cooling device and the vicinity shown in FIGS. A combination of the cooling device and the remote cooling device enables stable production of a high-strength rolled steel sheet. Furthermore, since the entrance side temperature of the second rolling mill group 31 can be accurately controlled at a low temperature by utilizing the intermediate cooling device, it becomes possible to perform stable rolling in the ferrite region in the second rolling mill group 31, The combination with a near-cooling device or a far-cooling device enables production of a high-strength material having high low-temperature brittleness in a thin slab-direct feed rolling facility.

又、図７に示すように、第１圧延機群３０の入り側、第２圧延機群３１の入り側の２箇所に、第１デスケーリング装置３３、第２デスケーリング装置３４を配置することが可能になる。この２箇所のデスケーリング装置３３、３４により、１次スケール及び２次スケールを除去することができるので、表面品質のきわめて高い高級鋼の生産が可能になる。   Further, as shown in FIG. 7, the first descaling device 33 and the second descaling device 34 are arranged at two locations on the entry side of the first rolling mill group 30 and on the entry side of the second rolling mill group 31. Is possible. Since the primary scale and the secondary scale can be removed by the two descaling devices 33 and 34, it is possible to produce high-grade steel with extremely high surface quality.

本発明の熱延鋼板製造設備の設備配置例を示す側面概念説明図である。It is side surface explanatory drawing which shows the example of equipment arrangement | positioning of the hot-rolled steel plate manufacturing equipment of this invention. 本発明の熱延鋼板製造設備の他の設備配置例を示す側面概念説明図である。It is side surface explanatory drawing which shows the other example of equipment arrangement | positioning of the hot-rolled steel plate manufacturing equipment of this invention. 冷却水により鋼板を冷却した場合に、蒸気膜の発生形態に影響する鋼板の温度と熱伝達係数の関係を示す概念説明図である。It is a conceptual explanatory drawing which shows the relationship between the temperature of a steel plate which influences the generation | occurrence | production form of a vapor film, and a heat transfer coefficient, when a steel plate is cooled with cooling water. 冷却水により鋼板を冷却した場合の蒸気膜の発生形態例を示す断面概念説明図である。It is a cross-sectional conceptual diagram which shows the example of a generation | occurrence | production form of a vapor film at the time of cooling a steel plate with cooling water. 急冷却設備での熱延鋼板を安定冷却のための支持構造例を示す側断面概念説明図である。It is a side cross-section conceptual explanatory drawing which shows the example of a support structure for stable cooling of the hot-rolled steel plate in rapid cooling equipment. 一般の薄スラブ連鋳直送熱延設備のレイアウトを示す側面概念説明図である。It is side surface explanatory drawing which shows the layout of a general thin slab continuous casting direct feed hot rolling equipment. 本発明の熱延鋼板製造設備の他の設備配置例を示す側面概念説明図である。It is side surface explanatory drawing which shows the other example of equipment arrangement | positioning of the hot-rolled steel plate manufacturing equipment of this invention.

符号の説明Explanation of symbols

１ 連続鋳造機
２ 薄スラブ
３ ローラテーブル
４ 加熱装置
５ トンネル炉
６ デスケーリング装置
７ 熱間圧延機群
８ 近方急冷却設備
９ 高速シャー
１０ａ、１０ｂ 切替えコイラ
１１ 空冷ゾーン
１２ 近方巻取設備
１３ ラミナー等緩冷却設備
１４ 遠方巻取設備
１５ 遠方急冷却設備
１６ａ、１６ｂ ピンチロール
１７ 支持ロール
１８ スプレーノズル等
３０ 第１圧延機群
３１ 第２圧延機群
３２ 温度制御装置
３３ 第１デスケーリング装置
３４ 第２デスケーリング装置 DESCRIPTION OF SYMBOLS 1 Continuous casting machine 2 Thin slab 3 Roller table 4 Heating device 5 Tunnel furnace 6 Descaling device 7 Hot rolling mill group 8 Near rapid cooling equipment 9 High-speed shear 10a, 10b Switching coiler 11 Air cooling zone 12 Near winding equipment 13 Laminar and other slow cooling equipment 14 Far-end winding equipment 15 Far-end rapid cooling equipment 16a, 16b Pinch rolls 17 Support rolls 18 Spray nozzles, etc. 30 First rolling mill group 31 Second rolling mill group 32 Temperature control device 33 First descaling device 34 Second descaling device

Claims (6)

薄スラブ連続鋳造−直送圧延設備による熱延鋼板製造設備であって、
薄スラブを鋳造する連続鋳造機と、
連続鋳造機の出側に配置し、薄スラブを搬送するローラテーブルと薄スラブを加熱・均熱する加熱装置とを備えたトンネル炉と、
このトンネル炉に後続して配置したデスケーリング装置と、
このデスケーリング装置に後続して配置した熱間圧延機群と、
この熱間圧延機群に後続して配置した急冷却設備と、
この急冷却設備に後続して配置し、空冷ゾーンに兼用、若しくは、切替え可能であり、高速シャー及び切替えコイラからなる近方巻取設備と、
近方巻取設備に後続して配置した緩冷却設備と、
この緩冷却設備に後続して配置した遠方巻取設備と
を備えたことを特徴とする熱延鋼板製造設備。 Thin slab continuous casting-hot-rolled steel sheet manufacturing equipment using direct feed rolling equipment,
A continuous casting machine for casting thin slabs;
A tunnel furnace that is disposed on the outlet side of the continuous casting machine and includes a roller table that conveys a thin slab and a heating device that heats and soaks the thin slab;
A descaling device placed after this tunnel furnace,
A group of hot rolling mills arranged subsequent to this descaling device;
Rapid cooling equipment arranged following this hot rolling mill group,
Placed after this rapid cooling equipment, can also be used as an air cooling zone, or can be switched, a near winding equipment consisting of a high-speed shear and a switching coiler,
A slow cooling facility located after the near winding facility;
A hot-rolled steel sheet manufacturing facility, comprising: a far-winding facility disposed subsequent to the slow cooling facility. 薄スラブ連続鋳造−直送圧延設備による熱延鋼板製造設備であって、
薄スラブを鋳造する連続鋳造機と、
連続鋳造機の出側に配置し、薄スラブを搬送するローラテーブルと薄スラブを加熱・均熱する加熱装置とを備えたトンネル炉と、
このトンネル炉に後続して配置したデスケーリング装置と、
このデスケーリング装置に後続して配置した熱間圧延機群と、
この熱間圧延機群に後続して配置した急冷却設備と、
この急冷却設備に後続して配置し、空冷ゾーンに兼用、若しくは、切替え可能であり、高速シャー及び切替えコイラからなる近方巻取設備と、
この近方巻取設備に後続して配置した他の急冷却設備と、
この他の急冷却設備に後続して配置した遠方巻取設備と
を備えたことを特徴とする熱延鋼板製造設備。 Thin slab continuous casting-hot-rolled steel sheet manufacturing equipment using direct feed rolling equipment,
A continuous casting machine for casting thin slabs;
A tunnel furnace that is disposed on the outlet side of the continuous casting machine and includes a roller table that conveys a thin slab and a heating device that heats and soaks the thin slab;
A descaling device placed after this tunnel furnace,
A group of hot rolling mills arranged subsequent to this descaling device;
Rapid cooling equipment arranged following this hot rolling mill group,
Placed after this rapid cooling equipment, can also be used as an air cooling zone, or can be switched, a near winding equipment consisting of a high-speed shear and a switching coiler,
Other rapid cooling equipment arranged after this near winding equipment,
A hot-rolled steel sheet manufacturing facility comprising: a far-winding facility disposed subsequent to the other rapid cooling facility. 薄物熱延鋼板を製造する場合には、熱間圧延機群後の急冷却設備と、高速シャー及び近接切替えコイラを備えた近方巻取設備とを使用することを特徴とする請求項１または２に記載の熱延鋼板製造設備。   When producing a thin hot-rolled steel sheet, a rapid cooling facility after a hot rolling mill group and a near winding facility equipped with a high-speed shear and a proximity switching coiler are used. 2. Hot-rolled steel sheet manufacturing equipment according to 2. 高強度熱延鋼板を製造する場合には、熱間圧延機群後の急冷却設備と、空冷ゾーンと、緩冷却設備または他の急冷却設備と、遠方巻取設備とを使用することを特徴とする請求項１または２に記載の熱延鋼板製造設備。   When manufacturing high-strength hot-rolled steel sheets, it uses a rapid cooling facility after the hot rolling mill group, an air cooling zone, a slow cooling facility or other rapid cooling facility, and a far-winding facility. The hot-rolled steel sheet manufacturing facility according to claim 1 or 2. 熱間圧延機群を複数に分割配置すると共に、分割された熱間圧延機群の間に、保熱、加熱装置又は冷却装置を配置することを特徴とする請求項１乃至４のいずれかに記載の熱延鋼板製造設備。   The hot rolling mill group is divided into a plurality of parts, and a heat retention, heating device, or cooling device is arranged between the divided hot rolling mill groups. The hot-rolled steel sheet manufacturing facility described. 分割された熱間圧延機群の各々の入り側に、デスケーリング装置を配置することを特徴とする請求項５に記載の熱延鋼板製造設備。   The hot-rolled steel sheet manufacturing facility according to claim 5, wherein a descaling device is arranged on each entry side of the divided hot rolling mill group.
JP2004368753A 2004-06-08 2004-12-21 Equipment for manufacturing high-strength hot-rolled steel sheet Withdrawn JP2006021246A (en)

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Cited By (8)

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JP2008068267A (en) * 2006-09-12 2008-03-27 Kobe Steel Ltd Method of cooling hot-rolled steel sheet
JP2009269087A (en) * 2008-04-08 2009-11-19 Nippon Steel Corp Apparatus and method for cooling hot rolling
KR101027295B1 (en) 2008-12-12 2011-04-06 주식회사 포스코 Apparatus for Measuring Temperature of Cooled Materials and Method for Measuring Heat-Flux of Cooling Machine by using the Same
US9666874B2 (en) 2006-09-22 2017-05-30 Bar Ilan University Porous clusters of silver powder promoted by zirconium oxide for use as a catalyst in gas diffusion electrodes, and method for the production thereof
CN108405617A (en) * 2018-05-11 2018-08-17 中冶赛迪工程技术股份有限公司 A kind of high-strength alloy aluminium high speed level casting rolling producing equipment and technique
US10265744B2 (en) 2013-12-26 2019-04-23 Posco Rolling apparatus, continuous casting and rolling apparatus and method
CN114210740A (en) * 2021-12-06 2022-03-22 山西太钢不锈钢股份有限公司 Automatic control method for cooling water of hot continuous rolling strip steel rolling line
JP2022055439A (en) * 2020-09-29 2022-04-08 Ｊｆｅスチール株式会社 Mill pacing control method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008068267A (en) * 2006-09-12 2008-03-27 Kobe Steel Ltd Method of cooling hot-rolled steel sheet
US9666874B2 (en) 2006-09-22 2017-05-30 Bar Ilan University Porous clusters of silver powder promoted by zirconium oxide for use as a catalyst in gas diffusion electrodes, and method for the production thereof
JP2009269087A (en) * 2008-04-08 2009-11-19 Nippon Steel Corp Apparatus and method for cooling hot rolling
KR101027295B1 (en) 2008-12-12 2011-04-06 주식회사 포스코 Apparatus for Measuring Temperature of Cooled Materials and Method for Measuring Heat-Flux of Cooling Machine by using the Same
US10265744B2 (en) 2013-12-26 2019-04-23 Posco Rolling apparatus, continuous casting and rolling apparatus and method
CN108405617A (en) * 2018-05-11 2018-08-17 中冶赛迪工程技术股份有限公司 A kind of high-strength alloy aluminium high speed level casting rolling producing equipment and technique
JP2022055439A (en) * 2020-09-29 2022-04-08 Ｊｆｅスチール株式会社 Mill pacing control method
JP7310772B2 (en) 2020-09-29 2023-07-19 Ｊｆｅスチール株式会社 Mil pacing control method
CN114210740A (en) * 2021-12-06 2022-03-22 山西太钢不锈钢股份有限公司 Automatic control method for cooling water of hot continuous rolling strip steel rolling line

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