JP3496534B2 - Hot rolling equipment row and rolling method of hot rolled steel strip - Google Patents
Hot rolling equipment row and rolling method of hot rolled steel stripInfo
- Publication number
- JP3496534B2 JP3496534B2 JP23843298A JP23843298A JP3496534B2 JP 3496534 B2 JP3496534 B2 JP 3496534B2 JP 23843298 A JP23843298 A JP 23843298A JP 23843298 A JP23843298 A JP 23843298A JP 3496534 B2 JP3496534 B2 JP 3496534B2
- Authority
- JP
- Japan
- Prior art keywords
- rolling
- rolled
- hot
- finishing
- mill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- General Induction Heating (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スラブを粗圧延、
仕上圧延して熱延鋼帯となす熱間圧延設備列および、熱
延鋼帯の圧延方法に関する。TECHNICAL FIELD The present invention relates to rough rolling of a slab,
The present invention relates to a hot rolling equipment train for finish rolling to form a hot rolled steel strip and a rolling method for the hot rolled steel strip.
【０００２】[0002]
【従来の技術】熱延鋼帯の材質は圧延仕上温度と密接な
関係がある。良好な材質を得るためには、圧延仕上温度
をフェライト変態開始温度以上に保たなければならな
い。圧延仕上温度を確保するための従来技術として、特
開平７−１５５８２２号公報や特開平９−２２５５０５
号公報が開示されている。2. Description of the Related Art The material of hot-rolled steel strip is closely related to the rolling finish temperature. In order to obtain a good material, the rolling finish temperature must be kept above the ferrite transformation start temperature. As a conventional technique for securing the rolling finishing temperature, Japanese Patent Laid-Open No. 7-155822 and Japanese Patent Laid-Open No. 9-225505.
Japanese patent publication is disclosed.
【０００３】特開平７−１５５８２２号公報は、仕上圧
延機の入側に設けた通電加熱装置で粗バーを加熱する方
法、特開平９−２２５５０５号公報は、仕上加速圧延
と、仕上圧延機入側の誘導加熱装置による粗バーの加熱
を併用して圧延仕上温度を確保する方法である。Japanese Unexamined Patent Publication No. 7-155822 discloses a method of heating a rough bar with an electric heating device provided on the entrance side of a finishing rolling mill, and Japanese Unexamined Patent Publication No. 9-225505 discloses a method of finishing accelerated rolling and finishing rolling. This is a method for securing the rolling finishing temperature by using the heating of the rough bar by the induction heating device on the side.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、仕上圧
延機入側で粗バーを加熱する従来技術には表面欠陥の問
題がある。粗バーのデスケーリング以降の仕上圧延中
に、被圧延材の表面に生成するスケールは、ウロコ状ス
ケール疵をはじめとする熱延鋼帯の表面欠陥の原因とな
る。被圧延材の表面温度が高いほど、発生するスケール
の量が多くなり、表面欠陥も発生しやすくなる。従来技
術の方法では、仕上圧延中の被圧延材の温度が高くなっ
てしまう。However, the conventional technique for heating the rough bar on the entry side of the finish rolling mill has a problem of surface defects. During the finish rolling after the descaling of the rough bar, the scale generated on the surface of the material to be rolled causes surface defects of the hot-rolled steel strip including scale-like scale flaws. The higher the surface temperature of the material to be rolled, the greater the amount of scale that is generated, and the more easily surface defects occur. In the method of the prior art, the temperature of the material to be rolled during finish rolling becomes high.
【０００５】本発明の目的は、上記の問題点を解決する
ために、圧延仕上温度の確保とウロコ状スケール疵など
の表面欠陥の防止を両立させることが可能な、熱間圧延
設備列及び熱延鋼帯の圧延方法を提供することにある。In order to solve the above-mentioned problems, an object of the present invention is to provide a hot rolling equipment train and a hot rolling equipment line capable of ensuring both the rolling finishing temperature and the prevention of surface defects such as scale-like scale flaws. It is to provide a rolling method for a rolled steel strip.
【０００６】[0006]
【課題を解決するための手段】前記課題を解決し目的を
達成するために、本発明は以下に示す手段を用いてい
る。
（１）本発明の設備列は、スラブを粗圧延して粗バーと
なす粗圧延機と、粗バーを仕上げ圧延して熱延鋼帯とな
す，最終仕上圧延機とこの最終仕上圧延機の１つ及び２
つ手前の２つの仕上圧延機を少なくとも含む複数の仕上
圧延機群と、前記最終仕上圧延機とこの最終仕上圧延機
の１つ及び２つ手前の２つの仕上圧延機間に夫々配置さ
れた，被圧延材を幅方向全体にわたって加熱する誘導加
熱装置とを備えたことを特徴とする熱間圧延設備列であ
る。In order to solve the above problems and achieve the object, the present invention uses the following means. (1) The equipment row of the present invention includes a rough rolling machine that roughly rolls a slab into a rough bar, and a final finishing rolling machine that finish-rolls the rough bar into a hot-rolled steel strip and the final finishing rolling machine. One and two
A plurality of finishing rolling mill groups including at least two finishing rolling mills before this, the final finishing rolling mill, and this final finishing rolling mill
Between the two finishing rolling mills, one before and two before
The a hot rolling mill system columns, characterized in that it comprises an induction heating apparatus for heating a material to be rolled over the entire width direction.
【０００７】（２）本発明の設備列は、前記仕上圧延機
群が、７つの仕上圧延機からなることを特徴とする、上
記（１）に記載の熱間圧延設備列である。(2) The equipment train of the present invention is the finish rolling mill.
The group is a hot rolling equipment train as described in (1) above , characterized in that it comprises seven finishing rolling mills .
【０００８】（３）本発明の圧延方法は、スラブを粗圧
延して粗バーとなし、粗バー表面のスケールを除去して
から、粗バーを複数スタンドからなる仕上圧延機群で仕
上圧延して熱延鋼帯となすにあたり、最終仕上圧延機と
この最終仕上圧延機の１つ及び２つ手前の２つの仕上圧
延機間に夫々配置された誘導加熱装置で被圧延材を幅方
向全体にわたって加熱することを特徴とする熱延鋼帯の
圧延方法である。(3) In the rolling method of the present invention, the slab is roughly rolled to form a rough bar, the scale on the surface of the rough bar is removed, and then the rough bar is finish-rolled by a finishing rolling mill group consisting of a plurality of stands. In order to form a hot rolled steel strip ,
Two finishing pressures one and two before this final finishing mill
A method for rolling a hot-rolled steel strip is characterized in that the material to be rolled is heated over the entire width direction by induction heating devices arranged between the rolling machines .
【０００９】（４）本発明の圧延方法は、仕上圧延機群
が７つの仕上圧延機からなることを特徴とする、上記
（３）に記載の熱延鋼帯の圧延方法である。(4) The rolling method of the present invention is a group of finish rolling mills.
Is composed of seven finishing rolling mills, and the method for rolling a hot-rolled steel strip according to (3) above.
【００１０】（５）本発明の圧延方法は、圧延仕上温度
がフェライト変態開始温度以上になるように、前記誘導
加熱装置を制御して被圧延材を加熱することを特徴とす
る上記（３）若しくは（４）いずれかに記載の熱延鋼帯
の圧延方法である。(5) The rolling method of the present invention uses the rolling finishing temperature.
The above-mentioned induction so that
Characterized by controlling the heating device to heat the material to be rolled
The method for rolling a hot-rolled steel strip according to (3) or (4) above .
【００１１】（６）本発明の圧延方法は、粗バー表面の
スケールを除去してから、仕上圧延が終了するまでの
間、被圧延材の表面温度が９５０℃を超えないことを特
徴とする上記（３）乃至（５）いずれかに記載の熱延鋼
帯の圧延方法である。（７）本発明の熱間圧延設備列は、スラブを粗圧延して
粗バーとなす粗圧延機と、粗バーを仕上圧延して熱延鋼
帯となす仕上圧延機群と、仕上圧延機と仕上圧延機の間
に被圧延材を幅方向全体にわたって加熱する誘導加熱装
置と、前記誘導加熱装置の入側及び出側に、被圧延材の
温度を検出する温度検出手段とを具備することを特徴と
する熱間圧延設備列である。 （８）本発明の圧延方法は、スラブを粗圧延して粗バー
となし、粗バー表面のスケールを除去してから、粗バー
を仕上圧延機群で仕上圧延して熱延鋼帯となすにあた
り、仕上圧延機と仕上圧延機の間に備えた誘導加熱装置
で被圧延材を幅方向全体にわたって加熱するとともに、
前記誘導加熱装置の入側及び出側に設置した、被圧延材
の温度を検出する温度検出手段により検出された被圧延
材の温度を基に、前記誘導加熱装置を制御して被圧延材
を加熱することを特徴とする熱延鋼帯の圧延方法であ
る。 (6) The rolling method of the present invention uses the rough bar surface
From removing the scale to finishing rolling
In particular, the surface temperature of the rolled material does not exceed 950 ° C.
The method for rolling a hot-rolled steel strip according to any one of the above (3) to (5) is characterized. (7) In the hot rolling equipment row of the present invention, the slab is roughly rolled.
Rough rolling machine to form a rough bar and finish rolling of a rough bar to hot-roll steel
Between strips and finishing mills and between finishing mills and finishing mills
Induction heating equipment that heats the rolled material over the entire width
Of the material to be rolled on the inlet side and the outlet side of the induction heating device.
A temperature detecting means for detecting the temperature.
It is a row of hot rolling equipment. (8) In the rolling method of the present invention, a slab is roughly rolled to obtain a rough bar.
After removing the scale on the rough bar surface,
To form hot-rolled steel strip by finishing rolling with a group of finishing rolling mills.
Induction heating equipment provided between the finishing mill and the finishing mill
To heat the rolled material over the entire width,
Material to be rolled installed on the inlet side and outlet side of the induction heating device
To be detected by temperature detecting means for detecting the temperature of
The material to be rolled is controlled by controlling the induction heating device based on the temperature of the material.
A method for rolling hot-rolled steel strip, which is characterized by heating
It
【００１２】[0012]
【発明の実施の形態】本発明者らは、圧延仕上温度をフ
ェライト変態開始温度以上に確保し、ウロコ状スケール
疵などの表面欠陥を防止するための、熱間圧延設備列や
圧延方法について鋭意検討を重ね、以下の知見を得るに
至った。BEST MODE FOR CARRYING OUT THE INVENTION The inventors of the present invention are keenly aware of hot rolling equipment trains and rolling methods for securing a rolling finishing temperature at a ferrite transformation start temperature or higher and preventing surface defects such as scale-like scale flaws. Through repeated studies, the following findings were obtained.
【００１３】（ａ）デスケーリング装置で粗バー表面の
スケールを除去してから、仕上圧延を終了するまでの
間、被圧延材の表面温度が９５０℃を越えないようにす
れば、ウロコ状スケール疵が発生しなくなる。(A) If the surface temperature of the material to be rolled does not exceed 950 ° C. from the time when the scale on the rough bar surface is removed by the descaling device to the time when finishing rolling is completed, scale-like scales can be used. No defects will occur.
【００１４】（ｂ）（ａ）を満たし、かつ、圧延仕上温
度をフェライト変態開始温度以上にするためには、仕上
圧延機の間に加熱装置を設けて、被圧延材を加熱すれば
よい。 以上の知見に基づき、本発明者らは、粗圧延機
と、仕上圧延機群の仕上圧延機と仕上圧延機の間にソレ
ノイド型誘導加熱装置とを備えた熱間圧延設備列を用い
て、粗バー表面のスケールを除去してから仕上圧延を終
了するまでの間、被圧延材の温度を一定範囲に制御し、
かつ圧延仕上温度をフェライト変態開始温度以上に保つ
ようにして、圧延仕上温度の確保とウロコ状スケール疵
などの表面欠陥の防止を両立させることが可能な、熱間
圧延設備列及び熱延鋼帯の圧延方法を見出し、本発明を
完成させた。In order to satisfy the conditions (b) and (a) and the rolling finishing temperature to be equal to or higher than the ferrite transformation start temperature, a heating device may be provided between the finishing rolling mills to heat the material to be rolled. Based on the above findings, the present inventors, using a rough rolling mill, a hot rolling equipment row provided with a solenoid type induction heating device between the finishing rolling mill and the finishing rolling mill of the finishing rolling mill group, From the removal of scale on the rough bar surface to the end of finish rolling, the temperature of the material to be rolled is controlled within a certain range,
Also, by keeping the rolling finishing temperature at or above the ferrite transformation start temperature, it is possible to secure both the rolling finishing temperature and prevent surface defects such as scale-like scale flaws. The present invention has been completed by finding out the rolling method of.
【００１５】以下に本発明の実施の形態について説明す
る。上記の知見をもとに開発した、熱間圧延設備列の概
略側面図を図１に示す。所定温度のスラブは粗圧延機１
で粗圧延されて粗バーとなる。粗バーはデスケーリング
装置３により、表面のスケールを除去された後、仕上圧
延機４で仕上圧延されて所定板厚の熱延鋼帯となる。Embodiments of the present invention will be described below. Fig. 1 shows a schematic side view of a hot rolling equipment train developed based on the above findings. The slab at a given temperature is a rough rolling mill 1
Is roughly rolled into a coarse bar. The coarse bar has its surface scale removed by the descaling device 3, and is finish-rolled by the finish rolling machine 4 to form a hot-rolled steel strip having a predetermined plate thickness.
【００１６】仕上圧延機４の間には、ソレノイド型誘導
加熱装置６が設置されており、仕上圧延中に被圧延材を
加熱する。ここで用いる加熱装置としては、制御応答性
に優れ、被圧延材に非接触で加熱できる誘導加熱装置以
外には考えられない。誘導加熱方式としては、ソレノイ
ド型誘導加熱方式とトランスバースフラックス型誘導加
熱方式の２種類が知られている。トランスバースフラッ
クス型誘導加熱装置には、次のような欠点がある。イン
ダクターの構造が複雑で、大電流を流すことができず、
単機容量が小さい。装置が高価である。被圧延材のエッ
ジ部が過加熱される。従って、トランスバースフラック
ス型誘導加熱装置は、本発明の熱間圧延設備列における
使用には適さない。そこで、本発明の熱間圧延設備列で
はソレノイド型誘導加熱装置が採用されている。A solenoid type induction heating device 6 is installed between the finish rolling mills 4 to heat the material to be rolled during finish rolling. As the heating device used here, there is no other idea than an induction heating device which has excellent control responsiveness and can heat the material to be rolled without contacting. Two types of induction heating methods are known, a solenoid type induction heating method and a transverse flux type induction heating method. The transverse flux type induction heating device has the following drawbacks. Since the structure of the inductor is complicated, it cannot pass a large current,
The unit capacity is small. The equipment is expensive. The edge portion of the material to be rolled is overheated. Therefore, the transverse flux type induction heating apparatus is not suitable for use in the hot rolling equipment train of the present invention. Therefore, in the hot rolling equipment row of the present invention, a solenoid type induction heating device is adopted.
【００１７】仕上圧延機入側温度計２やスタンド間温度
計５、仕上圧延機出側温度計９は、被圧延材の表面温度
を測定する温度検出手段である。これらの温度計による
測定結果は、演算装置７を介して制御装置８に送られ、
ソレノイド型誘導加熱装置６のフイードフォワード制
御、あるいはフィードバック制御に用いられる。The finish rolling mill inlet side thermometer 2, the inter-stand thermometer 5, and the finishing rolling mill exit side thermometer 9 are temperature detecting means for measuring the surface temperature of the material to be rolled. The measurement results of these thermometers are sent to the control device 8 via the arithmetic device 7,
It is used for feedforward control or feedback control of the solenoid type induction heating device 6.
【００１８】本発明の方法は、図１に示したような熱間
圧延設備列を用い、デスケーリング装置３で粗バー表面
のスケールを除去してから、仕上圧延を終了するまでの
間、被圧延材の表面温度が９５０℃を越えず、かつ、仕
上圧延機出側温度計９で測定される圧延仕上温度がフェ
ライト変態開始温度以上になるように、ソレノイド型誘
導加熱装置６を制御して、被圧延材を加熱することを特
徴とする、熱延鋼帯の圧延方法である。以下に本発明の
実施例を挙げ、本発明の効果を立証する。The method of the present invention uses a hot rolling equipment train as shown in FIG. 1, and removes the scale on the rough bar surface by the descaling device 3 and finishes the finish rolling. The solenoid-type induction heating device 6 is controlled so that the surface temperature of the rolled material does not exceed 950 ° C. and the rolling finishing temperature measured by the finishing rolling mill outlet thermometer 9 is equal to or higher than the ferrite transformation start temperature. A method for rolling a hot-rolled steel strip is characterized by heating a material to be rolled. Examples of the present invention will be given below to prove the effects of the present invention.
【００１９】[0019]
【実施例】図１に示す熱間圧延設備列を用いた圧延を行
った。板厚２３０ｍｍ、幅１，１００ｍｍ、長さ８，５
００ｍｍのスラブを、粗圧延により板厚３０ｍｍの粗バ
ーとなし、表面のスケールを除去した後、仕上圧延して
板厚１．６ｍｍ、幅１，１００ｍｍの熱延鋼帯を製造し
た。EXAMPLE Rolling was carried out using the hot rolling equipment train shown in FIG. Thickness 230mm, width 1,100mm, length 8.5
A 00 mm slab was rough-rolled into a rough bar having a plate thickness of 30 mm, and after removing surface scale, finish rolling was performed to manufacture a hot-rolled steel strip having a plate thickness of 1.6 mm and a width of 1,100 mm.
【００２０】本発明を実施した場合（本発明例）と、し
なかった場合（従来技術）について、被圧延材先端部の
表面温度の変化を図２に示す。横軸のＦＩＴは仕上圧延
機入側温度計２、ＤＳはデスケーリング装置３、ＦＤＴ
は仕上圧延機出側温度計９を示す。Ｆ１〜Ｆ７は、それ
ぞれ１段目から７段目までの仕上圧延機を表す。実線と
点線は計算結果を、黒丸と白丸は温度計による実測値を
示す。実測値と計算結果はよく一致しており、計算結果
は信頼できると考えられる。なお、図２では７００℃以
下の温度は表示していない。FIG. 2 shows changes in the surface temperature at the tip of the material to be rolled in the case where the present invention was carried out (example of the present invention) and when it was not carried out (prior art). The horizontal axis FIT is the thermometer 2 on the entry side of the finishing mill, DS is the descaling device 3, FDT.
Shows a thermometer 9 on the exit side of the finish rolling mill. F1 to F7 represent finish rolling mills from the first stage to the seventh stage, respectively. The solid and dotted lines show the calculation results, and the black and white circles show the measured values by the thermometer. The measured values and calculated results are in good agreement, and the calculated results are considered reliable. It should be noted that in FIG. 2, temperatures below 700 ° C. are not shown.
【００２１】ソレノイド型誘導加熱装置６を使用しない
従来技術の場合は、目標とする圧延仕上温度の８１０℃
を確保するために、仕上圧延機入側温度計２の位置で、
表面温度１０６０℃が必要である。このとき、仕上圧延
機４の１段目から４段目にかけて、被圧延材の表面温度
が９５０℃を越えている場所があり、出来上がった熱延
鋼帯先端部にウロコ状スケール疵が発生した。In the case of the prior art in which the solenoid type induction heating device 6 is not used, the target rolling finishing temperature is 810 ° C.
In order to secure the
A surface temperature of 1060 ° C is required. At this time, there were places where the surface temperature of the material to be rolled exceeded 950 ° C from the first stage to the fourth stage of the finishing rolling mill 4, and scale-like scale flaws were generated at the end of the finished hot-rolled steel strip. .
【００２２】これに対して、ソレノイド型誘導加熱装置
６で被圧延材を加熱した本発明例では、仕上圧延機入側
温度計２の測定温度が１，０２０℃でも、圧延仕上温度
８１０℃以上を確保することができた。この条件では、
仕上圧延中の被圧延材の表面温度は、最高でも９５０℃
以下であり、熱延鋼帯先端部にウロコ状スケール疵は観
察されなかった。On the other hand, in the example of the present invention in which the material to be rolled is heated by the solenoid type induction heating device 6, even if the temperature measured by the thermometer 2 on the entry side of the finishing rolling mill is 1,020 ° C., the rolling finishing temperature is 810 ° C. or more. Was able to be secured. In this condition,
The surface temperature of the rolled material during finish rolling is 950 ° C at the maximum.
Below, scale-like scale flaws were not observed at the tip of the hot-rolled steel strip.
【００２３】[0023]
【発明の効果】本発明の熱間圧延設備列を用いた熱延鋼
帯の圧延方法により、圧延仕上温度の確保とウロコ状ス
ケール疵などの表面欠陥の防止を両立させることがで
き、歩留りが向上する。また、表面性状が重要視される
材料についても、製造が容易となるなど、工業上の利用
価値は高い。EFFECTS OF THE INVENTION By the rolling method for hot-rolled steel strips using the hot rolling equipment train of the present invention, it is possible to secure both the rolling finishing temperature and the prevention of surface defects such as scale scale flaws, and the yield is improved. improves. In addition, even for materials whose surface properties are important, their industrial utility value is high, such as their ease of manufacture.
【図１】本発明の実施の形態に係る熱間圧延設備列の概
略側面図。FIG. 1 is a schematic side view of a row of hot rolling equipment according to an embodiment of the present invention.
【図２】本発明の実施例に係る被圧延材先端部の表面温
度の変化を本発明例と従来技術で比較した図。FIG. 2 is a diagram comparing changes in the surface temperature of the tip end of the material to be rolled according to the example of the present invention with the example of the present invention and the prior art.
１…粗圧延機 ２…仕上圧延機入側温度計 ３…デスケーリング装置 ４…仕上圧延機 ５…スタンド間温度計 ６…ソレノイド型誘導加熱装置 ７…演算装置 ８…加熱制御装置 ９…仕上圧延機出側温度計 1 ... Rough rolling mill 2 ... Thermometer on entry side of finishing rolling mill 3 Descaling device 4 ... Finishing mill 5 ... Thermometer between stands 6 Solenoid type induction heating device 7 ... Arithmetic device 8 ... Heating control device 9 ... Finishing rolling mill outlet thermometer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｈ０５Ｂ 6/10 ３８１ Ｈ０５Ｂ 6/10 ３８１ (72)発明者 関根 宏 東京都千代田区丸の内一丁目１番２号 日本鋼管株式会社内 (72)発明者 本屋敷 洋一 東京都千代田区丸の内一丁目１番２号 日本鋼管株式会社内 (56)参考文献 特開 平６−269835（ＪＰ，Ａ) 特開 平10−202311（ＪＰ，Ａ) 特開 平10−158733（ＪＰ，Ａ) 特開 平10−158734（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21B 1/26 B21B 45/00 C21D 1/42 C21D 9/60 H05B 6/06 H05B 6/10 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI H05B 6/10 381 H05B 6/10 381 (72) Inventor Hiroshi Sekine 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Yoichi Yashiki Yoichi Marunouchi 1-2-2, Marunouchi, Chiyoda-ku, Tokyo Inside Nihon Kokan Co., Ltd. (56) Reference JP-A-6-269835 (JP, A) JP-A-10-202311 (JP, A) JP 10-158733 (JP, A) JP 10-158734 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B21B 1/26 B21B 45/00 C21D 1 / 42 C21D 9/60 H05B 6/06 H05B 6/10
Claims (8)
機と、粗バーを仕上圧延して熱延鋼帯となす，最終仕上
圧延機とこの最終仕上圧延機の１つ及び２つ手前の２つ
の仕上圧延機を少なくとも含む複数の仕上圧延機群と、
前記最終仕上圧延機とこの最終仕上圧延機の１つ及び２
つ手前の２つの仕上圧延機間に夫々配置された，被圧延
材を幅方向全体にわたって加熱する誘導加熱装置とを備
えたことを特徴とする熱間圧延設備列。1. A rough rolling machine for roughly rolling a slab into a rough bar, and a final rolling for finishing rolling the rough bar into a hot rolled steel strip.
One of rolling mill and one of this final finishing mill and two before this
A plurality of finishing rolling mill groups including at least the finishing rolling mill of
The final finishing mill and one and two of the final finishing mills
One front of the respectively arranged between two finishing mill, hot rolling equipment train, characterized in that it comprises an induction heating device for heating over the entire width direction to be rolled.
からなることを特徴とする請求項１に記載の熱間圧延設
備列。 2. The finish rolling mill group comprises seven finish rolling mills.
The hot rolling installation according to claim 1, characterized in that
Stock list.
ー表面のスケールを除去してから、粗バーを複数スタン
ドからなる仕上圧延機群で仕上圧延して熱延鋼帯となす
にあたり、最終仕上圧延機とこの最終仕上圧延機の１つ
及び２つ手前の２つの仕上圧延機間に夫々配置された誘
導加熱装置で被圧延材を幅方向全体にわたって加熱する
ことを特徴とする、熱延鋼帯の圧延方法。3. A slab is roughly rolled into a rough bar, the scale on the surface of the rough bar is removed, and then the rough bar is finish-rolled by a finishing rolling mill group consisting of a plurality of stands to form a hot-rolled steel strip. , Final Finishing Mill and one of this Final Finishing Mill
And a method for rolling a hot-rolled steel strip, which comprises heating the material to be rolled over the entire width direction with an induction heating device arranged between each of the two finishing rolling mills before the rolling mill.
からなることを特徴とする請求項３に記載の熱延鋼帯の
圧延方法。 4. The finish rolling mill group comprises seven finish rolling mills.
Of the hot-rolled steel strip according to claim 3,
Rolling method.
以上になるように、前記誘導加熱装置を制御して被圧延
材を加熱することを特徴とする請求項３若しくは請求項
４いずれかに記載の熱延鋼帯の圧延方法。5. The rolling finish temperature is a ferrite transformation start temperature.
As described above, the induction heating device is controlled to perform rolling
The material is heated, or claim 3 or claim
4. The method for rolling a hot-rolled steel strip according to any one of 4 above .
仕上圧延が終了するまでの間、被圧延材の表面温度が９
５０℃を超えないことを特徴とする請求項３乃至請求項
５いずれかに記載の熱延鋼帯の圧延方法。6. After removing the scale on the surface of the rough bar,
Until the finish rolling is completed, the surface temperature of the rolled material is 9
Claims 3 to 3, characterized in that the temperature does not exceed 50 ° C.
5. The method for rolling a hot rolled steel strip according to any one of 5 above .
機と、粗バーを仕上圧延して熱延鋼帯となす仕上圧延機
群と、仕上圧延機と仕上圧延機の間に被圧延材を幅方向
全体にわたって加熱する誘導加熱装置と、前記誘導加熱
装置の入側及び出側に、被圧延材の温度を検出する温度
検出手段とを具備することを特徴とする熱間圧延設備
列。 7. A rough rolling process for roughly rolling a slab into a rough bar.
Machine and finish rolling machine to finish rolling the rough bar into hot rolled steel strip
Between the rolling mill and the finishing mill and the finishing mill in the width direction
Induction heating device for heating the whole and the induction heating
Temperature to detect the temperature of the material to be rolled on the inlet side and outlet side of the equipment
Hot rolling equipment, characterized by comprising:
Row.
ー表面のスケールを除去してから、粗バーを仕上圧延機
群で仕上圧延して熱延鋼帯となすにあたり、 仕上圧延機
と仕上圧延機の間に備えた誘導加熱装置で被圧延材を幅
方向全体にわたって加熱するとともに、前記誘導加熱装
置の入側及び出側に設置した、被圧延材の温度を検出す
る温度検出手段により検出された被圧延材の温度を基
に、前記誘導加熱装置を制御して被圧延材を加熱するこ
とを特徴とする熱延鋼帯の圧延方法。 8. A slab is roughly rolled to form a coarse bar,
ー After removing the scale on the surface, finish the rough bar with a finishing mill.
Upon forming a hot-rolled steel strip was finish rolled in groups, finish rolling mill
Width of the material to be rolled by the induction heating device provided between the
Heating in all directions and
Detects the temperature of the material to be rolled installed on the inlet and outlet sides
The temperature of the material to be rolled detected by the temperature
In addition, the induction heating device is controlled to heat the material to be rolled.
And a method for rolling a hot rolled steel strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23843298A JP3496534B2 (en) | 1998-08-25 | 1998-08-25 | Hot rolling equipment row and rolling method of hot rolled steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23843298A JP3496534B2 (en) | 1998-08-25 | 1998-08-25 | Hot rolling equipment row and rolling method of hot rolled steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000061505A JP2000061505A (en) | 2000-02-29 |
| JP3496534B2 true JP3496534B2 (en) | 2004-02-16 |
Family
ID=17030135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23843298A Expired - Fee Related JP3496534B2 (en) | 1998-08-25 | 1998-08-25 | Hot rolling equipment row and rolling method of hot rolled steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3496534B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006002505A1 (en) | 2005-10-31 | 2007-05-03 | Sms Demag Ag | Hot rolling method for e.g. thin slabs comprises heating them and passing them through finishing rollers, heat loss being compensated for by heaters between rollers which are only operated when temperature approaches lower threshold |
-
1998
- 1998-08-25 JP JP23843298A patent/JP3496534B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000061505A (en) | 2000-02-29 |
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