JPH0716683B2 - Continuous warm rolling equipment for stainless steel strip - Google Patents
Continuous warm rolling equipment for stainless steel stripInfo
- Publication number
- JPH0716683B2 JPH0716683B2 JP15102586A JP15102586A JPH0716683B2 JP H0716683 B2 JPH0716683 B2 JP H0716683B2 JP 15102586 A JP15102586 A JP 15102586A JP 15102586 A JP15102586 A JP 15102586A JP H0716683 B2 JPH0716683 B2 JP H0716683B2
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- stainless steel
- rolling
- strip
- heating device
- 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.)
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- Metal Rolling (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、鋼帯のうち特に冷間加工硬化の著しい準安
定オースナイト系のステンレス鋼帯の連続冷間圧延に有
利なステンレス鋼用連続温間圧延設備に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a continuous steel for stainless steel, which is advantageous for continuous cold rolling of a metastable austenitic stainless steel strip that is particularly cold work-hardened among steel strips. Regarding warm rolling equipment.
一般に、変形抵抗の大きいステンレス鋼帯等の冷間圧延
は通常、ゼンジミア圧延機など小径ワークロールを備え
た多重式の高圧下圧延機による可逆圧延が多く行われ
る。しかし、このような小径ワークロールで可逆式に行
う圧延は、圧延速度も比較的遅く生産性は低い。In general, cold rolling of stainless steel strip or the like having a large deformation resistance is usually performed reversibly by a multiple-type high-pressure rolling mill equipped with small-diameter work rolls such as a Sendzimir rolling mill. However, the reversible rolling with such a small diameter work roll has a relatively low rolling speed and low productivity.
そこで、最近では生産性向上を目的として上記のような
高圧下圧延機を例えば4スタンド等のタンデムミルとし
て連続圧延を行う方法も一部では実施されている。しか
し、このような圧延方法では上記したごとく圧延速度を
あまり大きくできず、またワークロールと鋼帯間でスリ
ップが生じる等の問題があるために、一般鋼帯の圧延に
使用される4重ないし6重で且つワークロール径も大き
いタンデム圧延機で、さらに工程入側に溶接機を配置し
て連続的にステンレス鋼帯を冷間タンデム圧延すること
が志向されるようになった。Therefore, recently, for the purpose of improving productivity, a method of performing continuous rolling using the above high-pressure lower rolling mill as a tandem mill such as a four-stand is also partially implemented. However, with such a rolling method, the rolling speed cannot be increased so much as described above, and there are problems such as slip between the work roll and the steel strip. With a tandem rolling mill having a six-fold size and a large work roll diameter, a welding machine is further arranged on the process entrance side to continuously cold-tandem roll a stainless steel strip.
ところで、ステンレス鋼帯は一般鋼帯に比べて生産性の
低さその他によって製造コストが高いという問題があ
る。上記のステンレス鋼帯の冷間タンデム圧延はこの製
造コスト低下に大きく寄与するが、さらに冷延鋼板用素
材に板厚の大きいものを使用すれば、それだけ冷間圧延
のトータルコストが低減することも知られている。しか
しながら、この素材の板厚を大きくすると、製品板厚を
得るために冷間圧延時の圧下率を大きくしなければなら
ず、このことはタンデム圧延の後段タスンドにおける加
工硬化の著増をきたして圧延に困難を伴うことになる。
また鋼帯の圧延時には絞り込み等を防止するためにある
程度強いスタンド間張力を保持しなければならないが、
鋼帯の加工硬化が大きいと板破断の発生頻度が高くな
る。By the way, the stainless steel strip has a problem that the manufacturing cost is higher than that of the general steel strip due to its low productivity and other factors. Cold tandem rolling of the above stainless steel strip greatly contributes to this reduction in manufacturing cost, but if the material for the cold rolled steel sheet with a large thickness is used, the total cost of cold rolling can be reduced accordingly. Are known. However, if the plate thickness of this material is increased, the reduction ratio during cold rolling must be increased in order to obtain the product plate thickness, which causes a significant increase in work hardening in the latter stage of tandem rolling. Rolling will be difficult.
Also, when rolling the steel strip, it is necessary to maintain a certain level of inter-stand tension to prevent narrowing, etc.
If the work hardening of the steel strip is large, the frequency of plate breakage increases.
ステンレス鋼の中でも特にSUS304,SUS301など表示され
る準安定オーステナイト系のステンレス鋼は、冷間加工
によってオーステナイトの一部が歪誘起マルテンサイト
に変態するため著しい加工硬化を呈することにより、4
重ないし6重圧延機で構成されるタンデム圧延機で冷間
圧延される例はなく、普通鋼帯では一般化しているタン
デム圧延による高生産性,高歩留まりなどの利益性を、
ステンレス鋼帯の場合は得られていない。Among the stainless steels, metastable austenitic stainless steels such as SUS304 and SUS301, which are marked by work-hardening because some of the austenite is transformed into strain-induced martensite by cold working,
There is no example of cold rolling in a tandem rolling mill composed of heavy or six-fold rolling mills, and the profitability such as high productivity and high yield due to tandem rolling, which is common in ordinary steel strip,
Not obtained for stainless steel strip.
そこで、このような加工硬化を防止するには、普通鋼に
おいてはすでに特開昭53−118259号公報に開示されてい
るように、圧延前にステンレス鋼を加熱する方法が採ら
れている。すなわち、タンデム圧延機の入側に、鋼帯を
200℃以上に加熱し、再結晶を生じない時間保持する加
熱装置を設けるものである。Therefore, in order to prevent such work hardening, a method of heating stainless steel before rolling is adopted for ordinary steel as already disclosed in JP-A-53-118259. That is, a steel strip is installed on the inlet side of the tandem rolling mill.
It is provided with a heating device which is heated to 200 ° C. or higher and is kept for a time not causing recrystallization.
しかしながら、前記特開昭53−118259号公報に開示され
た設備にあっては、加熱された鋼帯の温度が200℃以上
になるので、鋼帯表面が大気中の酸素によって酸化され
てテンパカラーが発生する。特にステンレス鋼帯の場合
には光輝のある美麗な表面が製品として要求されるの
で、テンパカラーが生じると表面研磨などの工程負荷が
増大するという問題が派生する。However, in the equipment disclosed in JP-A-53-118259, since the temperature of the heated steel strip is 200 ° C. or higher, the surface of the steel strip is oxidized by oxygen in the atmosphere and tempered. Occurs. In particular, in the case of stainless steel strip, since a beautiful and bright surface is required as a product, the problem that the process load such as surface polishing increases when the temper color occurs.
また、加熱装置とタンデム圧延機との間隔は小さいほど
その間の鋼板の温度降下が小さく加工上、好都合となる
が、一方鋼帯の蛇行の修正が困難となる。この鋼帯の蛇
行は、圧延中に鋼帯が破断したり、圧延形状が悪くなっ
たりする原因となるので、これを防ぐために一般にはタ
ンデム圧延機の入側直近にステアリング装置を設けた鋼
帯の蛇行を修正する方法が採られている。その理由は、
加熱装置が充分に小型であれば、ステアリング装置、小
型の加熱装置、タンデム圧延機の順序に配置可能である
が、高速ラインにおいては、鋼帯の通板速度が大きくな
るため、加熱装置が大型化して炉長が長く(約50m)な
り、加熱装置に入る前にステアリング装置で蛇行を修正
しても、この加熱装置を通過して圧延機に入るまでに再
び蛇行が生じるからである。Also, the smaller the distance between the heating device and the tandem rolling mill, the smaller the temperature drop of the steel sheet between them, which is convenient for processing, but it is difficult to correct the meandering of the steel strip. This meandering of the steel strip causes the steel strip to break during rolling, or the rolling shape to deteriorate.Therefore, in order to prevent this, in general, a steel strip provided with a steering device near the entrance side of the tandem rolling mill is used. The method of correcting the meandering of is adopted. The reason is,
If the heating device is sufficiently small, the steering device, the small heating device, and the tandem rolling mill can be arranged in that order, but in a high-speed line, the steel strip passing speed increases, so the heating device is large. This is because the length of the furnace becomes longer (about 50 m) and even if the meandering is corrected by the steering device before entering the heating device, the meandering occurs again before passing through the heating device and entering the rolling mill.
ところが、このようにタンデム圧延機の入側にステアリ
ング装置を設置すると、加熱装置からタンデム圧延機ま
での鋼帯のパス長さが大きくなる。このような従来の圧
延設備を第6図に示す。図において、3は巻戻機から繰
り出される鋼帯2を接続して連続体とするための溶接
機、4は鋼帯の滞留時間を調整するためのルーパー、5
は加熱装置、6はステアリング装置、8はタンデム圧延
機である。この設備においては加熱装置5とタンデム圧
延機8との間の鋼帯2のパス長さは少なくとも15〜20m
程度になる。However, when the steering device is installed on the entrance side of the tandem rolling mill in this way, the path length of the steel strip from the heating device to the tandem rolling mill becomes large. Such conventional rolling equipment is shown in FIG. In the figure, 3 is a welding machine for connecting the steel strips 2 fed from the rewinding machine to form a continuous body, 4 is a looper for adjusting the residence time of the steel strips, 5
Is a heating device, 6 is a steering device, and 8 is a tandem rolling mill. In this equipment, the path length of the steel strip 2 between the heating device 5 and the tandem rolling mill 8 is at least 15 to 20 m.
It will be about.
また、完全連続式タンデム圧延機においては、第7図に
示すように、鋼帯の通板速度を(イ)加速,(ロ)高
速,(ハ)減速,(ニ)低速のようなパターンを繰返す
運転を行うのが一般的である。これはルーパー4の容量
の大小又はその有無にもよるが、入側での鋼帯の溶接工
程や出側での鋼帯のせん断工程により一時,入側設備や
出側設備を休止させる時間を要するためである。さらに
鋼帯の溶接部分を圧延する際は破断し易いので、その圧
延速度を落とす必要もある。従って、加熱装置5とタン
デム圧延機8間におけるステンレス鋼帯の通過時間は上
記圧延速度のパターンによっても変化することから、こ
の間のステンレス鋼帯の温度降下量も変化することにな
る。従って圧延時の変形抵抗も変動することにより、圧
延後のステンレス鋼帯の板厚も変動するといった問題点
があった。Further, in the completely continuous tandem rolling mill, as shown in FIG. 7, the strip running speed of the steel strip has a pattern such as (a) acceleration, (b) high speed, (c) deceleration, and (d) low speed. It is common to perform repeated operations. This depends on the capacity of the looper 4 or the presence / absence of the capacity, but the time for suspending the equipment on the input side and the equipment on the output side may be temporarily stopped due to the welding process of the steel strip on the input side and the shearing process of the steel strip on the output side. This is because it costs. Further, when rolling the welded portion of the steel strip, it is easy to break, so it is necessary to reduce the rolling speed. Therefore, since the passage time of the stainless steel strip between the heating device 5 and the tandem rolling mill 8 changes depending on the rolling speed pattern, the temperature drop amount of the stainless steel strip during this period also changes. Therefore, there is a problem in that the plate resistance of the stainless steel strip after rolling also fluctuates because the deformation resistance during rolling also fluctuates.
この発明は、このような従来の問題点にかんがみてなさ
れたものであって、圧延機の入側直近に小型加熱装置を
設け、ステンレス鋼帯の接続はレーザービームで行う等
により、上記問題点を解決することを目的としている。The present invention has been made in view of such conventional problems, and a small heating device is provided in the vicinity of the entrance side of the rolling mill, and the stainless steel strip is connected by a laser beam. The purpose is to solve.
この発明は、巻戻機と前記タンデム圧延機との間に、加
工順序に従って、ステンレス鋼帯を接続するレーザービ
ーム溶接機と、通板中の鋼帯を一時貯蔵する貯込装置
と、ステンレス鋼帯を加熱する加熱装置と、ステンレス
鋼帯の蛇行を修正する蛇行修正装置と、通板中の放熱に
よって温度低下したステンレス鋼帯を放熱前の温度程度
に加熱する小型加熱装置とを、順次配置したステンレス
鋼帯用連続温間圧延設備としたものである。The present invention relates to a laser beam welding machine for connecting a stainless steel strip between a rewinding machine and the tandem rolling mill according to a processing order, a storage device for temporarily storing a steel strip in a strip, and a stainless steel. A heating device that heats the strip, a meandering correction device that corrects the meandering of the stainless steel strip, and a small heating device that heats the stainless steel strip that has decreased in temperature due to heat dissipation during passage of the strip to the temperature before heat dissipation are sequentially arranged. This is a continuous warm rolling facility for stainless steel strips.
巻戻された鋼帯は、レーザービーム溶接機によって接続
され連続体となって連続圧延される。この際、鋼帯の接
続部は従来の溶接に比べて入熱量が小さいので接続部近
傍の結晶粒粗大化が少ないため溶接強度はそれほど低下
せず、従って圧延時における溶接部破断頻度が著しく小
さくなる。The rewound steel strips are connected by a laser beam welding machine and are continuously rolled into a continuous body. At this time, since the heat input at the joint of the steel strip is smaller than that of conventional welding, there is less grain coarsening in the vicinity of the joint, so the welding strength does not decrease so much, and therefore the fracture frequency of the weld during rolling is extremely small. Become.
溶接された鋼帯は加熱装置に入り、ここで所定範囲の温
度に加熱して圧延の際のマルテンサイト生成率を減少さ
せる。次いで蛇行修正装置へ入って蛇行を修正され、タ
ンデム圧延機の直前に配置された小型加熱装置へ入っ
て、ここで前記加熱装置出口からこの小型加熱装置入口
までの間に放熱して温度低下した鋼帯を再び放熱前の温
度にまで上昇してタンデム圧延機へ送る。鋼帯は所定温
度を維持して圧延されるため変形抵抗が小さく、従って
圧延後の最終板厚の変動等を来たすことなく充分高い通
板速度を維持でき生産性を向上できる。The welded steel strip enters a heating device, where it is heated to a temperature within a predetermined range to reduce the martensite formation rate during rolling. Then, it goes into the meandering correction device to correct the meandering and goes into a small heating device placed immediately before the tandem rolling mill, where heat is dissipated between the heating device outlet and the small heating device inlet to lower the temperature. The steel strip is again heated to the temperature before heat dissipation and sent to the tandem rolling mill. Since the steel strip is rolled while maintaining a predetermined temperature, its deformation resistance is small, and therefore, a sufficiently high strip-passing speed can be maintained and productivity can be improved without causing fluctuations in the final strip thickness after rolling.
以下、この発明を図面に基づいて説明する。第1図は本
発明の一実施例を示す概要図である。なお、第6図で説
明した従来例と同一の部分については同一の符号を付
し、重複する説明を省く。The present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of the present invention. The same parts as those of the conventional example described with reference to FIG. 6 are designated by the same reference numerals, and duplicated description will be omitted.
図において、焼鈍酸洗済みの熱延ステンレス鋼帯2は加
工順序に従って以下の工程を経過する。すなわち、1台
又は複数台の巻戻機1a,1bから巻戻されたステンレス鋼
帯は、それぞれの端部をレーザービーム溶接機3で接続
されて連続体となり、ルーパー4へ入る。ルーパー4は
ステンレス鋼帯2の通過経路を伸縮できる巻掛ロールを
多数具えていて、鋼帯2のルーパー4内での滞留時間を
調整できるようになっている。この時間調整は例えば鋼
帯2の溶接時における通板休止時間や圧延出側における
鋼帯せん断のための休止時間等を吸収するために行われ
る。次にステンレス鋼帯2はルーパー4から炉長の大き
い加熱装置5へ入り、ここで所定温度(200℃を超えな
い)に再結晶を生じない時間加熱保持される。6はステ
ンレス鋼帯2の蛇行を圧延機へ入る前に修正する蛇行修
正装置としてのステアリング装置である。7はタンデム
圧延機8の入側の直前に設けられた小型の加熱装置であ
って、加熱装置5を通過したステンレス鋼帯2がステア
リング装置6を通過することによって放熱低下した温度
を再び元の所定温度に加熱して次のタンデム圧延の際に
変形抵抗が大きくならないようにするものである。10は
タンデム圧延機8によって温間圧延されたストリップで
あって、それぞれ巻戻機11aや11bに巻取られ、巻取られ
たコイル径が所定の大きさになると、走間シャー9によ
ってせん断されるようになっている。In the figure, the hot rolled stainless steel strip 2 that has been annealed and pickled undergoes the following steps according to the processing order. That is, the stainless steel strips unwound from one or a plurality of unwinders 1a and 1b are connected to each other by the laser beam welding machine 3 to form a continuous body, and enter the looper 4. The looper 4 is equipped with a large number of winding rolls capable of expanding and contracting the passage of the stainless steel strip 2 so that the residence time of the steel strip 2 in the looper 4 can be adjusted. This time adjustment is performed, for example, in order to absorb the strip running time during welding of the steel strip 2 and the rest time for shearing the steel strip on the rolling-out side. Next, the stainless steel strip 2 enters the heating device 5 having a large furnace length from the looper 4, and is heated and maintained at a predetermined temperature (not exceeding 200 ° C.) for a period of time during which recrystallization does not occur. Reference numeral 6 is a steering device as a meandering correction device for correcting the meandering of the stainless steel strip 2 before entering the rolling mill. Reference numeral 7 denotes a small heating device provided immediately before the entrance side of the tandem rolling mill 8. The stainless steel strip 2 that has passed through the heating device 5 passes through the steering device 6, and the temperature of which heat radiation is reduced is restored to the original temperature. It is heated to a predetermined temperature to prevent the deformation resistance from increasing during the next tandem rolling. 10 is a strip that is warm-rolled by the tandem rolling mill 8 and is wound by the rewinding machines 11a and 11b, respectively, and when the wound coil diameter reaches a predetermined value, it is sheared by the running shear 9 It has become so.
次に作用を説明する。Next, the operation will be described.
巻戻されたステンレス鋼帯2はレーザービーム溶接機3
によって接続され、連続体として連続圧延することによ
り、オフゲージ量を減少し、歩留まり等を向上できる。
ここで、レーザービーム溶接を行うのは、MIG溶接やフ
ラッシュバット溶接では溶接部への入熱量が多く、熱影
響部での結晶粒子の粗大化が生じて溶接強度が低下する
ことから、圧延時における溶接部からの破断頻度が高く
なることを防ぐためである。第2図は各溶接法による強
度を、繰返し曲げ試験によって示したもので、レーザー
ビーム溶接によるものは格段に強いことがわかる。The rewound stainless steel strip 2 is a laser beam welding machine 3
Are connected by continuous rolling as a continuous body, the amount of off gauge can be reduced, and the yield and the like can be improved.
Here, laser beam welding is performed in MIG welding or flash butt welding because the heat input to the weld is large and coarsening of crystal grains occurs in the heat-affected zone to reduce welding strength. This is to prevent an increase in the frequency of breakage from the welded portion. Fig. 2 shows the strength of each welding method by repeated bending tests, and it can be seen that the strength of laser beam welding is remarkably strong.
また、ステンレス鋼帯2は炉長の大きい加熱装置5内で
200℃を超えない所定温度で再結晶を生じない時間加熱
されることにより冷間加工硬化の増大を第3図に示すご
とく低下させる。図において横軸はステンレス鋼帯の加
熱温度を、縦軸は鋼帯2に生じるマルテンサイトを体積
率で表示したもので、圧下率γが10,20,30%の3水準に
ついて示した線図である。この図から板温が高くなるに
従ってマルテンサイト生成量は減少することがわかる。
さらに圧下率が10%ではその生成量も減少量もわずか
で、水平に近い直線状を呈しているが、圧下率が高くな
ると圧下率に比例して著しいマルテンサイト生成量が板
温80℃近くまでの加熱で急激に減少(半減以上)し、80
℃を超えるとその減少傾向は緩やかとなって圧下率10%
の場合とほぼ同程度となる。In addition, the stainless steel strip 2 is placed in the heating device 5 having a large furnace length.
The increase in cold work hardening is reduced as shown in FIG. 3 by heating at a predetermined temperature not exceeding 200 ° C. for a time that does not cause recrystallization. In the figure, the horizontal axis shows the heating temperature of the stainless steel strip, and the vertical axis shows the martensite that occurs in the steel strip 2 as a volume ratio. A diagram showing the three levels of reduction ratio γ of 10, 20, 30%. Is. From this figure, it can be seen that the amount of martensite produced decreases as the plate temperature increases.
Further, when the rolling reduction is 10%, the amount of production and the amount of reduction are slight, and it shows a straight line that is almost horizontal, but when the rolling reduction is high, the remarkable martensite production is in proportion to the rolling reduction and the plate temperature is near 80 ° C. Rapidly decreases (more than half) by heating up to 80
When the temperature exceeds ℃, the decreasing tendency becomes gradual and the rolling reduction is 10%.
It is almost the same as the case of.
すなわち、ステンレス鋼帯は加熱して冷間圧延を行うと
マルテンサイトの生成量は少なくなり、圧延負荷を軽減
することができる。また、通常の加工硬化による変形抵
抗の増加を抑制する効果もあるから、準安定オーステナ
イト系のステンレス鋼帯の場合には、この加熱は圧延負
荷の軽減あるいは圧下率の向上に大きく寄与するもので
ある。That is, when the stainless steel strip is heated and cold-rolled, the amount of martensite produced is reduced and the rolling load can be reduced. In addition, since it also has the effect of suppressing the increase in deformation resistance due to normal work hardening, in the case of a metastable austenitic stainless steel strip, this heating greatly contributes to reducing the rolling load or improving the rolling reduction. is there.
以上のように、ステンレス鋼帯はその温度を高くするこ
とによって冷間圧延を有利に行うことができるが、高す
ぎるとテンパカラー発生の問題が生じる。第4図はこの
テンパカラーの発生程度を色差計によって調査したもの
である。同図において、横軸に板温、縦軸に色差計出力
(b値)をとったもので、これから板温が200℃を超え
ると急激にテンパカラーが発生することがわかる。すな
わち、ステンレス鋼帯やその中でも特に準安定オーステ
ナイト系ステンレス鋼帯をタンデム圧延機によって冷間
圧延する際は、その鋼帯の温度を200℃を超えないよう
に加熱することが有利であり、とりわけ、その温度を80
〜200℃の範囲内に収めることが望ましい。As described above, the cold rolling can be advantageously performed by increasing the temperature of the stainless steel strip, but if it is too high, the problem of temper color occurs. FIG. 4 shows the degree of occurrence of the temper color by a color difference meter. In the figure, the horizontal axis represents the plate temperature, and the vertical axis represents the color difference meter output (b value). It can be seen from this that when the plate temperature exceeds 200 ° C., a temper color is rapidly generated. That is, when cold rolling a stainless steel strip or a metastable austenitic stainless steel strip among them, with a tandem rolling mill, it is advantageous to heat the steel strip so that the temperature does not exceed 200 ° C. , Its temperature 80
It is desirable to keep it within the range of ~ 200 ° C.
しかし、加熱装置5でステンレス鋼帯2を上記のごとく
加熱してもタンデム圧延機8に入る前のステアリング装
置6での放熱による板温の低下を補償しなければ上記の
効果が得られない。いま、ステアリング装置6でのステ
ンレス鋼帯2のパス長さを15mとすると、大気中での放
熱による温度降下量は約1℃/秒であるので、第7図に
示した速度パターンでは例えば、 と、出側板温度差16.2℃が生じ、これにより変形抵抗が
約10%変化するため、ステンレス鋼帯の最終板厚に変動
を与えてしまうことになる。However, even if the stainless steel strip 2 is heated by the heating device 5 as described above, the above effect cannot be obtained unless the lowering of the plate temperature due to heat radiation in the steering device 6 before entering the tandem rolling mill 8 is compensated. Now, assuming that the path length of the stainless steel strip 2 in the steering device 6 is 15 m, the temperature drop due to heat dissipation in the atmosphere is about 1 ° C./sec. Therefore, in the speed pattern shown in FIG. Then, a temperature difference of 16.2 ° C on the outlet side occurs, which changes the deformation resistance by about 10%, which causes a change in the final thickness of the stainless steel strip.
そこで、本発明においては、ステアリング装置6の出側
でかつタンデム圧延機8の入側直近に小型加熱装置7を
配置して、ステアリング装置6通過時に生じた温度の低
下分を正確に補償することにより、圧延機8入側の鋼帯
温度を一定に保つようにしたものである。Therefore, in the present invention, the small heating device 7 is arranged on the exit side of the steering device 6 and in the immediate vicinity of the entrance side of the tandem rolling mill 8 to accurately compensate for the decrease in temperature that occurs when the steering device 6 is passed. Thus, the temperature of the steel strip on the inlet side of the rolling mill 8 is kept constant.
なお、上記加熱装置5,7としては、誘導加熱装置、直火
炉、ラジアントチューブバーナ式炉など、いずれの装置
でもよいが、別途設けた燃焼装置から発生する燃焼ガス
を鋼帯に吹付けるガスジェット加熱装置の方が装置が簡
便で且つ鋼帯速度の変化に容易に対応できる点でより好
適である。The heating device 5, 7 may be any device such as an induction heating device, a direct furnace, a radiant tube burner type furnace, etc., but a gas jet for blowing a combustion gas generated from a separately provided combustion device onto a steel strip. The heating device is more preferable because the device is simple and can easily cope with changes in the steel strip speed.
第5図に他の実施例を示す。FIG. 5 shows another embodiment.
これは大型及び小型加熱装置5,7の間に張力付加装置12
及びステアリング装置6を配置したタンデム圧延設備で
ある。この張力付加装置12はステンレス鋼帯の圧延機8
の入側における張力を高めて圧延性を良好とし、また大
型加熱装置5内における鋼帯張力を低下することにより
加熱中の鋼帯のクリープ変形による幅縮み等を防止する
ようにしたものである。上記以外の作用については前記
実施例と同様である。This is a tensioning device 12 between the large and small heating devices 5 and 7.
And a tandem rolling facility in which the steering device 6 is arranged. This tension applying device 12 is a rolling mill for stainless steel strip 8
The tension on the entry side of the steel strip is increased to improve rolling property, and the steel strip tension in the large-sized heating device 5 is reduced to prevent width shrinkage due to creep deformation of the steel strip during heating. . The operation other than the above is the same as that of the above embodiment.
以上説明したように本発明によれば、準安定オーステナ
イト系ステンレス鋼帯のような加工硬化の著しい材質の
鋼帯であっても、通常のタンデム圧延機によって圧延性
の悪化、板破断などのトラブルを生じることなく安定し
て連続冷間圧延を行うことができ、従って生産能力の向
上、歩留まりの改善、生産コストの低下など大きな効果
が得られる。As described above, according to the present invention, even a steel strip of a material that is significantly work-hardened, such as a metastable austenitic stainless steel strip, is deteriorated in rollability by an ordinary tandem rolling mill, and troubles such as plate rupture are caused. The continuous cold rolling can be stably performed without causing the occurrence, and therefore, great effects such as improvement in production capacity, improvement in yield, and reduction in production cost can be obtained.
第1図は本発明に係る実施例の概要説明図、第2図は鋼
帯の各溶接方法による溶接部の強度比較線図、第3図は
鋼帯の加熱温度とマルテンサイト生成量の関係を示す線
図、第4図は鋼帯の加熱温度とテンパカラー発生の関係
を示す線図、第5図は他の実施例と概要説明図、第6図
は従来例の概要説明図、第7図は時間による鋼帯速度の
パターンを示す図である。 1a,1b……巻戻機、2,10……ステンレス鋼帯、3……レ
ーザービーム溶接機、4……貯込み装置(ルーパー)、
5……加熱装置、6蛇行修正装置(ステアリング装
置)、7……小型加熱装置、8……タンデム圧延機。FIG. 1 is a schematic explanatory view of an embodiment according to the present invention, FIG. 2 is a strength comparison diagram of a welded portion by each welding method of steel strips, and FIG. 3 is a relationship between heating temperature of steel strips and martensite formation amount. 4 is a diagram showing the relationship between the heating temperature of the steel strip and the occurrence of temper color, FIG. 5 is another embodiment and a schematic explanatory diagram, FIG. 6 is a schematic explanatory diagram of a conventional example, FIG. 7 is a diagram showing a pattern of steel strip speed depending on time. 1a, 1b …… Rewinder, 2,10 …… Stainless steel strip, 3 …… Laser beam welding machine, 4 …… Storing device (looper),
5 ... Heating device, 6 Meandering correction device (steering device), 7 ... Small heating device, 8 ... Tandem rolling mill.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−102519(JP,A) 特開 昭58−196102(JP,A) 特開 昭60−137503(JP,A) ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-56-102519 (JP, A) JP-A-58-196102 (JP, A) JP-A-60-137503 (JP, A)
Claims (1)
延するタンデム圧延機を有する連続圧延設備において、
前記巻戻機と前記タンデム圧延機との間に、加工順序に
従って、ステンレス鋼帯を接続するレーザービーム溶接
機と、通板中のステンレス鋼帯を一時貯蔵する貯込装置
と、ステンレス鋼帯を加熱する加熱装置と、ステンレス
鋼帯の蛇行を修正する蛇行修正装置と、通板中の放熱に
よって温度低下したステンレス鋼帯を放熱前の温度程度
に加熱する小型加熱装置とを順次配置したことを特徴と
するステンレス鋼帯用連続温間圧延設備。1. A continuous rolling facility having a rewinding machine for rewinding a steel strip and a tandem rolling mill for rolling the rewound steel strip,
Between the rewinding machine and the tandem rolling mill, according to the processing order, a laser beam welding machine for connecting stainless steel strips, a storage device for temporarily storing the stainless steel strips in the strip, and a stainless steel strip. A heating device for heating, a meandering correction device for correcting meandering of the stainless steel strip, and a small heating device for heating the stainless steel strip whose temperature has been lowered due to heat radiation during passage of the strip are arranged in sequence. Characteristic continuous warm rolling equipment for stainless steel strip.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15102586A JPH0716683B2 (en) | 1986-06-27 | 1986-06-27 | Continuous warm rolling equipment for stainless steel strip |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15102586A JPH0716683B2 (en) | 1986-06-27 | 1986-06-27 | Continuous warm rolling equipment for stainless steel strip |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6310005A JPS6310005A (en) | 1988-01-16 |
JPH0716683B2 true JPH0716683B2 (en) | 1995-03-01 |
Family
ID=15509657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15102586A Expired - Fee Related JPH0716683B2 (en) | 1986-06-27 | 1986-06-27 | Continuous warm rolling equipment for stainless steel strip |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0716683B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10259027B2 (en) | 2014-01-29 | 2019-04-16 | Jfe Steel Corporation | Cold rolling facility and cold rolling method |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0669575B2 (en) * | 1989-07-19 | 1994-09-07 | 川崎製鉄株式会社 | Warm rolling equipment for stainless steel strip |
ES2043123T3 (en) * | 1990-01-20 | 1993-12-16 | Thyssen Industrie | PROCEDURE AND DEVICE TO WELD ONE WITH ANOTHER STEEL SHEET THROUGH A LASER RAY WELDING PROCEDURE. |
JP2017148858A (en) * | 2016-02-26 | 2017-08-31 | 日新製鋼株式会社 | Laser welded section steel made of stainless steel and manufacturing method thereof |
JP2017148857A (en) * | 2016-02-26 | 2017-08-31 | 日新製鋼株式会社 | Laser welded section steel made of stainless steel and manufacturing method thereof |
-
1986
- 1986-06-27 JP JP15102586A patent/JPH0716683B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10259027B2 (en) | 2014-01-29 | 2019-04-16 | Jfe Steel Corporation | Cold rolling facility and cold rolling method |
Also Published As
Publication number | Publication date |
---|---|
JPS6310005A (en) | 1988-01-16 |
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