JPS62253734A - Device for preventing thermal deformation of strip supporting roll - Google Patents
Device for preventing thermal deformation of strip supporting rollInfo
- Publication number
- JPS62253734A JPS62253734A JP9681786A JP9681786A JPS62253734A JP S62253734 A JPS62253734 A JP S62253734A JP 9681786 A JP9681786 A JP 9681786A JP 9681786 A JP9681786 A JP 9681786A JP S62253734 A JPS62253734 A JP S62253734A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- strip
- thermal deformation
- gas
- temp
- 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.)
- Granted
Links
- 238000007664 blowing Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 abstract description 31
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000000112 cooling gas Substances 0.000 abstract description 2
- 238000004804 winding Methods 0.000 abstract description 2
- 238000000137 annealing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/563—Rolls; Drums; Roll arrangements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、帯板を支持するロールの熱変形を防止する装
置に関し、例えば、連続焼鈍炉等の竪型炉に組込まれる
ハースロール、ボトムロールなどに対して適用される。Detailed Description of the Invention <Industrial Application Field> The present invention relates to a device for preventing thermal deformation of a roll supporting a strip, such as a hearth roll or a bottom roll installed in a vertical furnace such as a continuous annealing furnace. Applies to roles, etc.
〈従来の技術〉
帯板（以下、ストリップと呼ぶ）を支持すロールを第３
図に示す０図において、１は炉で、この炉ｌ内にロール
２が回転可能に支持されている。走行するストリップ３
はロール２に巻き掛は支持される。<Prior art> A roll supporting a strip (hereinafter referred to as a strip) is
In Figure 0 shown in the figure, 1 is a furnace, and a roll 2 is rotatably supported in this furnace 1. Running strip 3
is supported by the roll 2.
上記炉ｌにより１例えば、ストリップ３を加熱する場合
、炉内温度ＴＦは何らかの加熱装置によりストリップ３
の温度Ｔｓより高くされ、ス、トリップ３はその雰囲気
の熱により加熱される。For example, when heating the strip 3 using the above-mentioned furnace 1, the temperature inside the furnace TF is set by some heating device to heat the strip 3.
temperature Ts, and the strip 3 is heated by the heat of the atmosphere.
ロール２は炉１内でストリップ３の移送につれて回転し
ており、ストリップ３が接触している部分Ａとストリッ
プ３が接触しない部分Ｂとがロール軸方向に存在する。The roll 2 rotates in the furnace 1 as the strip 3 is transferred, and there are a portion A where the strip 3 is in contact and a portion B where the strip 3 is not in contact in the roll axis direction.
炉内温度ＴＦがストリップ温度ＴＳよりも高い場合、ロ
ール２におけるストリップ３が接触していない部分Ｂは
、ロール全周にわたって加熱される。ロール２における
ストリップ３が接触する部分Ａではストリップ３により
冷却される。この結果、ロール２におけるストリップ′
１清く）自軸＋ス蔗４）Δ小迫度ｌ↓フＬ１１−イり議
Ｃ接触しない部分Ｂに比べて温度が低くなり、ロール２
は図中実線で示す如く熱変形を起す（図中、破線は熱変
形前のロール２形状を示す）、このように、ロール２が
変形すると５後述するように、ストリップ３の通板に支
障を来たすことになる。When the furnace temperature TF is higher than the strip temperature TS, a portion B of the roll 2 that is not in contact with the strip 3 is heated over the entire circumference of the roll. A portion A of the roll 2 where the strip 3 contacts is cooled by the strip 3. As a result, the strip' on roll 2
1 Clear) Self-axis + Suzuki 4) Δ Small pressure l ↓ F L11-Iri C The temperature is lower than the part B that does not contact, Roll 2
causes thermal deformation as shown by the solid line in the figure (in the figure, the broken line indicates the shape of the roll 2 before thermal deformation).If the roll 2 is deformed in this way, as will be described later in 5, threading of the strip 3 will be hindered. will come.
そこで、従来より、第４図において破線で示すように、
ロール２にイニシャルクラウン２ａを付け、熱変形時に
もロール？中央部が高くなるような構造が採用されてい
る。Therefore, as shown by the broken line in Fig. 4, conventionally,
Attach initial crown 2a to roll 2, and roll even when thermally deformed? The structure is such that the central part is higher.
〈発明が解決しようとする問題点〉
ところで、上記イニシャルクラウン２ａをどのくらい付
けるかを決定するのはなかなか難しく、また、炉ｌの運
転状況に応じて適切であったり、適切でなかったりして
しまう。<Problems to be solved by the invention> By the way, it is quite difficult to determine how much of the above-mentioned initial crown 2a to attach, and it may or may not be appropriate depending on the operating status of the furnace l. .
ロール２のイニシャルクラウン２ａを大キく付け過ぎた
場合には、第５図に示す如く。If the initial crown 2a of the roll 2 is applied too much, it will be as shown in FIG.
ロール２が熱変形した後もロール中央部の径が大き過ぎ
てしまう、このような状態のロール２にストリップ３を
巻き掛けると、ロール２に接したストリップ３内には引
張応力σ□が、ロール２に接触直前のストリップ３には
その反力としての圧縮応力σ２が発生する。When the strip 3 is wound around the roll 2 in such a state that the diameter at the center of the roll is too large even after the roll 2 is thermally deformed, a tensile stress σ□ is generated in the strip 3 in contact with the roll 2. A compressive stress σ2 is generated in the strip 3 just before it contacts the roll 2 as a reaction force.
そして、この圧縮応力σ２のためメトリー２ブ３が座屈
すると突起４が生じ、この突起４がロール２上では絞り
込まれてしわ５になってしまう、いわゆるヒートバック
ルが生じ、製品となら、なくなってしまう。When the metrology 2 plate 3 buckles due to this compressive stress σ2, protrusions 4 are formed, and these protrusions 4 are squeezed into wrinkles 5 on the roll 2, creating a so-called heat buckle, which disappears when the product is produced. It ends up.
ロール２のイニシャルクラウン２ａが過少の場合には前
述のストレートロールの場合と同様に、第６図に示すよ
うに、ロール中央部に四部２ｂができてしまう、このよ
うな状態では、ストリップ３は左右どちらかに寄り、つ
まり蛇行し、著しい場合にはストリップ３が炉壁をこす
り、操業が困難となったり、ストリップ３の破断が生じ
てしまい、操業を中断しなければならないような事態に
至る。If the initial crown 2a of the roll 2 is too small, a four-part portion 2b will be formed at the center of the roll, as shown in FIG. 6, as in the case of the straight roll described above. If the strip 3 moves to either the left or right side, that is, meandering, and in severe cases, the strip 3 will rub against the furnace wall, making operation difficult or causing the strip 3 to break, leading to a situation where the operation has to be interrupted. .
本発明は、上記のような従来の技術状況にかんがみてな
されたもので、ストリップが巻き掛けられるロールが軸
方向に不均一に熱変形することにより生ずるストリップ
の蛇行、ヒートバックルを防止することを目的とする。The present invention has been made in view of the conventional technical situation as described above, and aims to prevent meandering and heat buckling of the strip caused by non-uniform thermal deformation in the axial direction of the roll on which the strip is wound. purpose.
く問題点を解決するための手段〉
上記目的を達成する本発明の構成は、帯板を支持するロ
ールにおける帯板の接触しない部分に対向させて当該帯
板の接触しない部分にガスを吹き付けてロール軸方向に
沿っての温度差を減少させるガス吹き付け手段を設けて
なる帯板支持ロールの熱変形防止装置に存する。Means for Solving the Problems> The configuration of the present invention to achieve the above object includes blowing gas onto the non-contacting portion of the strip by opposing the non-contacting portion of the strip in the roll supporting the strip. The present invention relates to a device for preventing thermal deformation of a strip supporting roll, which is provided with a gas blowing means for reducing the temperature difference along the roll axis direction.
く作 用〉
帯板を支持するロールにおいて、４１ｆ板が接触する部
分は帯板との熱交換により帯板が接触しない部分と温度
差が生じるが、ガス吹き付け手段により帯板が接触しな
い部分にガスを吹き付けることにより、ロールにおける
帯板が接触する部分と接触しない部分の温度差をなくし
、ロール軸方向に沿っての熱変形く実 施 例〉
第１図には本発明に係る帯板支持ロールの熱変形防止装
置を竪型連続焼鈍炉加熱帯におけるハースロールに適用
した一実施例の概略構造を示し、第２図にはそのＩＩ
−ＩＩ線矢視断面を示しである。Effect> In the roll that supports the strip, there is a temperature difference between the part where the 41f plate contacts and the part where the strip does not come into contact due to heat exchange with the strip, but the gas blowing means increases the temperature between the part where the strip does not come in contact with the roll. By blowing gas, the temperature difference between the part of the roll where the strip is in contact and the part where it is not in contact is eliminated, and thermal deformation is caused along the roll axis direction. A schematic structure of an embodiment in which a roll thermal deformation prevention device is applied to a hearth roll in a vertical continuous annealing furnace heating zone is shown in FIG.
- II line arrow cross section is shown.
ｌは炉で、その上部にロール６が回転自在に支持されて
いる。このロール６はストレート円筒のロールである。1 is a furnace, on the top of which a roll 6 is rotatably supported. This roll 6 is a straight cylindrical roll.
このロール６にストリップ３が巻き掛けられる。ロール
６の下側には、ストリップ３が接触しない部分に対向さ
せてガス吹き付け手段としてガスジェットブレナム７が
設けられる。ガスジェットブレナム７のロール６側の面
は凹面状となっており、そこには多数のガス吹き出し孔
８が設けられている。ガス吹き出し孔８は円形の孔でな
くスリット状のものであってもよい、ガスジェットブレ
ナム７には、例えば炉内ガスが図示されていない熱交換
器を通して温度調節に供給されるガスとしては、他の設
備等で発生したガスを利用することもできる。尚、ガス
ジェットプレナム７はロール６に最小幅のストリップが
かけられた場合でも、ロール６のストリップ非接触部分
を完全におおいつくせるようにロール軸方向寸法を設定
しである。The strip 3 is wound around this roll 6. On the lower side of the roll 6, a gas jet blemish 7 is provided as a gas blowing means so as to face a portion not in contact with the strip 3. The surface of the gas jet plenum 7 on the roll 6 side is concave, and a large number of gas blowing holes 8 are provided there. The gas blow-off hole 8 may be a slit-shaped hole instead of a circular hole.For example, the gas jet blenum 7 may be supplied with furnace gas for temperature control through a heat exchanger (not shown). Gas generated by other equipment can also be used. The dimensions of the gas jet plenum 7 in the roll axis direction are set so that even when a strip of the minimum width is applied to the roll 6, the part of the roll 6 not in contact with the strip can be completely covered.
ロール６に対向して設けられた前記ガスジェットプレナ
ム７のガス吹き出し孔８よリロール６のストリップの接
触しない部分にガスが吹き付けられる。ストリップ３が
ロール６より低温のときには冷却ガスが噴射され。Gas is blown from the gas blowing holes 8 of the gas jet plenum 7 provided opposite the roll 6 to the portions of the reroll 6 that are not in contact with the strip. When the strip 3 is cooler than the roll 6, cooling gas is injected.
ストリップ３がロール６より高温のときには加熱ガスが
噴射される。よって、ストリップ３の巻き掛は移送中に
おいても、ロール６軸方向に沿っての温度を均一にする
ことができ、温度差による不均一なロール６の熱変形は
防止される。ロール６の不均一な熱変形が防止されるの
で、ストリップ３の蛇行、ヒートバックルは防止される
。When the strip 3 is hotter than the roll 6, heating gas is injected. Therefore, even during the winding of the strip 3, the temperature can be made uniform along the axial direction of the roll 6, and uneven thermal deformation of the roll 6 due to temperature differences can be prevented. Since uneven thermal deformation of the roll 6 is prevented, meandering and heat buckling of the strip 3 are prevented.
次に２本発明を竪型連続焼鈍炉加熱帯入口の第１番目の
ハースロールに適用した例を示す。Next, an example will be shown in which the present invention is applied to the first hearth roll at the entrance of the heating zone of a vertical continuous annealing furnace.
ハースＯ−ル：Ｉｒｌ長２１００ｍｍ、径８０ｉ）ｍｗ
。Hearth o-ru: Irl length 2100mm, diameter 80i) mw
.
シェル厚 ２０ｍｍ
ガスジェットプレナム：ハースロールそれぞれの端部か
ら７５０■の位置まで設けられる。ガス、ジェットノズ
ル（ガス吹き出し孔）：径１０ｍｍ、 ピッチ５０ｓ層
、ロールとの距離５０ｍ諺条件：炉内雰囲気温度８００
℃、ストリップを
温度１２０℃、ストリップの寸法０．８ｍｍ Ｘ８０
０ｍｍ’、ストリップ速度４００ｍ／５ｉｎ（１）上記
条件でストリップを搬送させるが前記ガスジェットプレ
ナムを作動させない場合（従来の場合）
ストリップが角度的１８０°にわたって接触する部分の
おけるハースロールのロールセンタ部シェルの温度は１
５０℃となり。Shell thickness: 20mm Gas jet plenum: Provided at a position 750 mm from the end of each hearth roll. Gas, jet nozzle (gas blowout hole): diameter 10mm, pitch 50s layer, distance from roll 50m Conditions: Furnace atmosphere temperature 800
℃, strip temperature 120℃, strip size 0.8mm X80
0mm', strip speed 400m/5in (1) When the strip is conveyed under the above conditions but the gas jet plenum is not operated (conventional case) Roll center part of the hearth roll in the part where the strip contacts over 180° angularly The temperature of the shell is 1
It became 50℃.
ストリップが接触しない部分のロール温度はロール端部
から内側へ１５０ａｍの位置において７３０℃となる。The temperature of the roll where the strips do not touch is 730° C. at a position 150 am inward from the end of the roll.
上記状態で運転中、ストリップはロール胴長方向に移動
してしまい、炉内及び炉入口部に設けられたステアリン
グ装置で制御しなければならなかった。During operation under the above conditions, the strip moved in the lengthwise direction of the roll body, and had to be controlled by a steering device installed inside the furnace and at the furnace inlet.
（２）上記条件でストリップを搬送し、且つガスジェッ
トプレナムへ約５０℃のガスを供給した場合
ハースロールのシェルセンタ部の温度ハ１４５℃、ロー
ル端部から内側へ１５０ｍｍの位置における温度は３０
０℃となり、ストリッ −プが接触している部分と接触
してない部分の温度差が小さくなり、温度差に起因する
熱変形の不均一は問題とならず、ストリップを安定して
４００ｓ／ｍ■で炉内センタ部を搬送し得た。(2) When the strip is transported under the above conditions and gas at approximately 50°C is supplied to the gas jet plenum, the temperature at the shell center of the hearth roll is 145°C, and the temperature at a position 150mm inward from the end of the roll is 30°C.
0℃, the temperature difference between the contacting part of the strip and the non-contacting part becomes small, and uneven thermal deformation caused by the temperature difference is no longer a problem, and the strip can be stably heated at 400 s/m. The center part of the furnace was able to be transported using (2).
尚２本発明は、ＡＰ炉（焼鈍後酸洗を必要とする炉）、
Ｂ Ａ炉（光輝焼鈍炉）等の連続焼鈍炉だけでなく、
ストリップとロールとの間〈発明の効果〉
本発明に係る帯板支持ロールの熱変形防止装置によれば
、ロールにおける帯板が接触しない部分にガス吹き付け
手段によりガスを吹き付けてロール軸方向に沿っての温
度差を小さくし、もってロール軸方向に沿っての不均一
な熱変形、いわゆるサーマルクラウンを小さくする。こ
とができるので、帯板の変形、搬送中の蛇行が未然に防
止され、製品の歩留り向上、操業の安定化が図れる。2. The present invention applies to AP furnaces (furnaces that require pickling after annealing),
In addition to continuous annealing furnaces such as B A furnace (bright annealing furnace),
Between the strip and the roll <Effect of the invention> According to the device for preventing thermal deformation of a strip supporting roll according to the present invention, gas is blown by the gas blowing means to the portion of the roll where the strip does not come into contact with the strip along the axial direction of the roll. This reduces the temperature difference between the rolls, thereby reducing non-uniform thermal deformation along the roll axis, so-called thermal crown. As a result, deformation of the strip and meandering during transportation can be prevented, improving product yield and stabilizing operations.
第１図は本発明の一実施例に係る帯板支持ロール熱変形
防止装置の概略図、第２図はそのＩＩ −ＩＩ矢視断面
図、第３図は連続焼鈍炉内におけるロールの正面図、第
４図は熱変形対処手段を施した従来のロールの半玉面図
、第５図。
第６図はロールの熱変形がストリップに与える悪影響を
示す説明図である。
図 面 中。
３はストリップ、
６はロール、
７はガスジェットプレナム、
８はガス吹き出し孔である。FIG. 1 is a schematic diagram of a device for preventing thermal deformation of a strip supporting roll according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along arrow II-II, and FIG. 3 is a front view of the roll in a continuous annealing furnace. , FIG. 4 is a half-surface view of a conventional roll provided with means for dealing with thermal deformation, and FIG. FIG. 6 is an explanatory diagram showing the adverse effect that thermal deformation of the roll has on the strip. Inside the drawing. 3 is a strip, 6 is a roll, 7 is a gas jet plenum, and 8 is a gas blowout hole.
Claims (1)
対向させて当該帯板の接触しない部分にガスを吹き付け
てロール軸方向に沿っての温度差を減少させるガス吹き
付け手段を設けてなることを特徴とする帯板支持ロール
の熱変形防止装置。A roll supporting the strip is provided with a gas blowing means that is placed opposite to the non-contacting portion of the strip and blows gas onto the non-contacting portion of the strip to reduce the temperature difference along the roll axis direction. Features: A device for preventing thermal deformation of a strip support roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61096817A JPH062910B2 (en) | 1986-04-28 | 1986-04-28 | Device for preventing thermal deformation of strip supporting roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61096817A JPH062910B2 (en) | 1986-04-28 | 1986-04-28 | Device for preventing thermal deformation of strip supporting roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62253734A true JPS62253734A (en) | 1987-11-05 |
| JPH062910B2 JPH062910B2 (en) | 1994-01-12 |
Family
ID=14175134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61096817A Expired - Fee Related JPH062910B2 (en) | 1986-04-28 | 1986-04-28 | Device for preventing thermal deformation of strip supporting roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH062910B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347926A (en) * | 1989-07-14 | 1991-02-28 | Sumitomo Metal Ind Ltd | Device for controlling crown in roll for heat treatment |
| FR2660935A1 (en) * | 1990-04-11 | 1991-10-18 | Selas Sa | Process for the treatment of sheet metal and treatment oven applying this process |
| EP0935004A1 (en) * | 1998-02-09 | 1999-08-11 | STEIN HEURTEY, Société Anonyme: | Improved annealing device for sheet metal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4564765B2 (en) * | 2004-03-11 | 2010-10-20 | 新日本製鐵株式会社 | Thermal crown control device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53130210A (en) * | 1977-04-20 | 1978-11-14 | Chugai Ro Kogyo Kaisha Ltd | Continuous vertical heat treating furnace having roll chamber |
| JPS5843454A (en) * | 1981-09-09 | 1983-03-14 | Konishiroku Photo Ind Co Ltd | Processing method for color photosensitive silver halide material |
-
1986
- 1986-04-28 JP JP61096817A patent/JPH062910B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53130210A (en) * | 1977-04-20 | 1978-11-14 | Chugai Ro Kogyo Kaisha Ltd | Continuous vertical heat treating furnace having roll chamber |
| JPS5843454A (en) * | 1981-09-09 | 1983-03-14 | Konishiroku Photo Ind Co Ltd | Processing method for color photosensitive silver halide material |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347926A (en) * | 1989-07-14 | 1991-02-28 | Sumitomo Metal Ind Ltd | Device for controlling crown in roll for heat treatment |
| FR2660935A1 (en) * | 1990-04-11 | 1991-10-18 | Selas Sa | Process for the treatment of sheet metal and treatment oven applying this process |
| EP0935004A1 (en) * | 1998-02-09 | 1999-08-11 | STEIN HEURTEY, Société Anonyme: | Improved annealing device for sheet metal |
| FR2774700A1 (en) * | 1998-02-09 | 1999-08-13 | Stein Heurtey | IMPROVEMENTS TO COOLING OVENS FOR STRIP PRODUCTS |
| US6023048A (en) * | 1998-02-09 | 2000-02-08 | Stein Heurtey | Cooling furnaces for strip products |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH062910B2 (en) | 1994-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS62253734A (en) | Device for preventing thermal deformation of strip supporting roll | |
| JPS59143028A (en) | Cooler for metallic strip in continuous heat treating furnace | |
| JPS6056218B2 (en) | Heat treatment method for metal strips | |
| JPH0621296B2 (en) | Temperature control device for steel strip support rolls | |
| KR950007080Y1 (en) | Forming roll for steel plate | |
| JP2877863B2 (en) | Continuous heat treatment furnace for strip | |
| JPH02277727A (en) | Continuous heat treatment furnace for preventing thermal deformation of cooling zone roll | |
| JP4564765B2 (en) | Thermal crown control device | |
| JPS62256921A (en) | Steel strip supporting roll | |
| JPH02282431A (en) | Continuous heat-treating furnace with thermal deformation of supporting roll prevented | |
| JPH03188225A (en) | Method for correcting meandering of steel strip | |
| JP2789819B2 (en) | Method of preventing drawing of steel strip in continuous annealing furnace | |
| JPH06306488A (en) | Continuous heat treating furnace for steel strip preventing generation of drawing on steel strip | |
| JP2776033B2 (en) | Method of preventing meandering of steel strip in continuous annealing furnace | |
| JPH08176680A (en) | Crown controller of hearth roll in continuously heat-treating furnace and crown controlling | |
| JP2001323325A (en) | Apparatus and method for cooling metal strip | |
| JPH1072625A (en) | Method for controlling crown of hearth roll in continuous annealing furnace | |
| JPS62256922A (en) | Method for preventing thermal deformation of strip supporting roll | |
| JP2003328038A (en) | Process for cooling cylindrical metal coil | |
| JPH07188784A (en) | Device for controlling crown of hearth roll in continuous heat treatment furnace | |
| JP2901802B2 (en) | Operating method of indirect heating type continuous heat treatment furnace | |
| JP3106848B2 (en) | Gas header and method of preventing temperature difference deformation of roll using the same | |
| JPH0819478B2 (en) | Structure to prevent temperature difference deformation of strip support rolls | |
| JPH0215615B2 (en) | ||
| JP4123699B2 (en) | Heat treatment method for metal strip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |