JPH052728B2 - - Google Patents
Info
- Publication number
- JPH052728B2 JPH052728B2 JP60041788A JP4178885A JPH052728B2 JP H052728 B2 JPH052728 B2 JP H052728B2 JP 60041788 A JP60041788 A JP 60041788A JP 4178885 A JP4178885 A JP 4178885A JP H052728 B2 JPH052728 B2 JP H052728B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- zone
- steel strip
- heating zone
- cooling
- 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
- 238000010438 heat treatment Methods 0.000 claims description 50
- 238000001816 cooling Methods 0.000 claims description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000000137 annealing Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 11
- 239000010960 cold rolled steel Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 238000002791 soaking Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、鋼帯の連続焼鈍方法および設備に関
するもので、特に、連続焼鈍に際してのヒートサ
イクル、ラインスピード、板厚等の変更時におけ
る板温を制御して焼鈍材の材質不均一を、効果的
に防止する方法および装置に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method and equipment for continuous annealing of steel strips, and in particular, to continuous annealing of steel strips when changing heat cycles, line speeds, thicknesses, etc. The present invention relates to a method and apparatus for effectively preventing material non-uniformity in an annealed material by controlling temperature.
（従来の方法）
一般に、鋼帯の連続焼鈍炉は、入側から予熱
帯、加熱帯、均熱帯および冷却帯（過時効処理が
ある場合は過時効帯を含む）より構成されてお
り、各帯域の加熱、冷却方式として、予熱帯は加
熱帯および均熱帯からの排ガスによる直接加熱も
しくは、排ガスと熱交換せしめた空気による加熱
を行ない、加熱帯および均熱帯ではラジアントチ
ユーブ式加熱また、冷却帯では、ロール冷却、ガ
スジエツト冷却、クーリングチユーブ冷却などが
一般に行なわれている。ところで、この加熱帯で
の操業方法は、ヒートサイクルが同じで、鋼帯の
板厚が変わつた場合には、加熱帯炉温は変えずに
ラインスピードを、（板厚）×（ラインスピード）
が一定となる様に制御することによつて、加熱帯
出口板温を、目標板温に制御し、また、ヒートサ
イクルが変更となつた場合には、加熱帯の設定炉
温を変えて、加熱帯出口板温を制御している。(Conventional method) In general, a continuous annealing furnace for steel strip is composed of a pre-heating zone, a heating zone, a soaking zone, and a cooling zone (including an overaging zone if an overaging treatment is performed) from the entry side. As for the heating and cooling methods for the zone, the preheating zone is heated directly by exhaust gas from the heating zone and soaking zone, or heated by air that exchanges heat with the exhaust gas.In the heating zone and soaking zone, radiant tube heating or cooling zone is used. In general, roll cooling, gas jet cooling, cooling tube cooling, etc. are used. By the way, in this heating zone operation method, if the heat cycle is the same and the thickness of the steel strip changes, the line speed is changed to (plate thickness) x (line speed) without changing the heating zone furnace temperature.
By controlling the heating zone to be constant, the plate temperature at the outlet of the heating zone is controlled to the target plate temperature, and when the heat cycle is changed, the set furnace temperature of the heating zone is changed. Controls the plate temperature at the exit of the heating zone.
（発明が解決しようとする問題点）
しかしながら、加熱帯設定炉温を変更する場
合、炉温の応答性がおそく、100℃の炉温変更に
20〜30分必要である。したがつて、例えばライン
スピードが300mpmの場合約１コイル分の加熱不
良による材質不良が発生するため、これに相当す
るダミーコイルを使用する必要がある。ところ
が、このことはダミーコイルの通板時間分は生産
に寄与しておらず、また省エネルギー上も好まし
くない。更にダミーコイルの入側溶接、出側分
割、および出側から入側へのハンドリングなどの
余分な作業を必要とした。(Problem to be solved by the invention) However, when changing the heating zone setting furnace temperature, the response of the furnace temperature is slow, and when the furnace temperature is changed by 100℃,
It takes 20-30 minutes. Therefore, for example, when the line speed is 300 mpm, material defects occur due to poor heating of about one coil, so it is necessary to use a corresponding dummy coil. However, this does not contribute to production by the time required for threading the dummy coil, and is also unfavorable in terms of energy conservation. Furthermore, extra work was required, such as welding the dummy coil on the input side, dividing the output side, and handling from the output side to the input side.
また、同一ヒートサイクルで板厚が変更になつ
た場合は溶接点の前後において変更板厚に応じた
ラインスピードに速やかに設定できないため、そ
の間の板は材質不良となる。そこで板厚変更量を
先行板厚の例えば±15％以内に制限することによ
り、加熱帯出口での板温を許容温度範囲内とし、
材質不良の発生を防止している。従つて対象材の
操業スケジユール組みやコイル置場におけるコイ
ル管理を繁雑にしていた。 Furthermore, if the plate thickness is changed during the same heat cycle, it is not possible to quickly set the line speed in accordance with the changed plate thickness before and after the welding point, so the material of the plate in between becomes defective. Therefore, by limiting the amount of plate thickness change to within ±15% of the preceding plate thickness, the plate temperature at the exit of the heating zone can be kept within the allowable temperature range.
This prevents material defects from occurring. Therefore, the operation schedule for the target material and the coil management at the coil storage area were complicated.
（問題点を解決するための手段）
本発明は、上記の問題を解決するため、ヒート
サイクル、ラインスピード、板厚等の変更に対応
して、鋼帯の温度を迅速かつ効果的に目標の板温
にするための焼鈍方法および焼鈍装置を提供し
て、従来の操業の繁雑さおよびダミーコイルの使
用をなくすことを目的とする。(Means for Solving the Problems) In order to solve the above problems, the present invention quickly and effectively adjusts the temperature of the steel strip to the target in response to changes in heat cycles, line speeds, plate thicknesses, etc. It is an object of the present invention to provide an annealing method and an annealing apparatus for bringing the temperature of a plate to the desired temperature, thereby eliminating the complexity of conventional operations and the use of dummy coils.
これがため、本発明によれば、第１図に示すよ
うに、鋼帯の連続焼鈍炉１の加熱帯ｂの途中にガ
スジエツトまたはロールによる急速冷却手段を有
する板温制御ゾーンｃを設け、冷延鋼帯の連続焼
鈍に際し、ヒートサイクル、ラインスピード、板
厚等の変更時に連続焼鈍炉の加熱帯において鋼帯
を応答性の良いガスジエツトまたはロールにより
冷却して鋼帯の加熱温度を目標温度に制御するこ
とを特徴とする。 Therefore, according to the present invention, as shown in FIG. 1, a strip temperature control zone c having rapid cooling means using a gas jet or rolls is provided in the middle of the heating zone b of the continuous annealing furnace 1 for the steel strip, and During continuous annealing of steel strip, the heating temperature of the steel strip is controlled to the target temperature by cooling the steel strip in the heating zone of the continuous annealing furnace with a responsive gas jet or roll when changing the heat cycle, line speed, plate thickness, etc. It is characterized by
（作用）
本発明によれば、ラジアントチユーブ式加熱を
行なつている加熱帯の途中に板温制御ゾーンを設
けてヒートサイクル、ラインスピード、板厚等の
変更時に、鋼帯を冷却することにより鋼帯の加熱
温度を迅速かつ効果的に低下させて目標温度に制
御することができ、これにより操業の繁雑さをな
くし、また、ダミーコイルの使用を不要にするこ
とができる。(Function) According to the present invention, a strip temperature control zone is provided in the middle of the heating zone where radiant tube heating is performed, and the steel strip is cooled when changing the heat cycle, line speed, plate thickness, etc. The heating temperature of the steel strip can be quickly and effectively lowered and controlled to the target temperature, thereby making the operation less complicated and making it unnecessary to use a dummy coil.
ところで、鋼帯の抜熱量Qsはラジアントチユ
ーブ式加熱（冷却）、ガスジエツト式加熱冷却及
びロール冷却の場合、各々下記の式で求められ
る。 By the way, the amount of heat Qs removed from the steel strip is determined by the following formula in the case of radiant tube heating (cooling), gas jet heating/cooling, and roll cooling.
(1) ラジアントチユーブ式加熱（冷却）
Qs＝4.88×φcq
｛（Tf＋273／100）4−（Ts＋273／100）4P｝ …
φcq：総括伝熱係数
Tf：炉温（炉壁、ラジアントチユーブの温度
の影響を受ける）
Ts：鋼帯温度
(2) ガスジエツト式冷却
Qs＝kvn（Tg−Ts） …
ｋ：定数
ｖ：ガス流速
ｎ：定数
Tg：ガス温度
(3) ロール冷却
Qs＝αt（TR−Ts） …
α：定数
ｔ：ロールとの接触時間で、巻付け角、ロール
本数に支配される
TR：ロール表面温度
鋼帯への受熱量Qsを変化させる場合、すなわ
ち、ヒートサイクル、板厚およびラインスピード
の変更の際には、ラジアントチユーブ式加熱の場
合には、炉温Tfを変化させる必要があるが、炉
壁、ラジアントチユーブの熱容量が大きいために
迅速なTfの変化は望めない。(1) Radiant tube heating (cooling) Q s = 4.88×φ cq {(T f +273/100) 4 − (T s +273/100) 4 P} … φ cq : Overall heat transfer coefficient T f : Furnace temperature (Affected by the temperature of the furnace wall and radiant tube) T s : Steel strip temperature (2) Gas jet cooling Q s = kvn (T g - T s )... k: constant v: gas flow rate n: constant T g : Gas temperature (3) Roll cooling Q s = αt (T R − T s ) … α: Constant t: Contact time with roll, controlled by winding angle and number of rolls T R : Roll surface temperature To steel strip When changing the amount of heat received Q s , that is, when changing the heat cycle, plate thickness, and line speed, in the case of radiant tube heating, it is necessary to change the furnace temperature T f , but the furnace wall , a rapid change in T f cannot be expected because the heat capacity of the radiant tube is large.
しかし、ガスジエツト式冷却の場合には、ガス
流速の変更で、容易かつ迅速に受熱量を変更する
ことができ、また、ロール式冷却の場合には、鋼
帯のロールへの巻き付け角、巻き付けロール本数
の変更すなわち、ロールと鋼帯との接触時間を変
更することで容易かつ迅速に受熱量Qsを変更す
ることができる。 However, in the case of gas jet cooling, the amount of heat received can be changed easily and quickly by changing the gas flow rate, and in the case of roll cooling, the angle at which the steel strip is wrapped around the roll, By changing the number of rolls, that is, by changing the contact time between the roll and the steel strip, the amount of heat received Q s can be changed easily and quickly.
ガスジエツトにおける流速の変更手段として
は、ダンパーを用いた風量の調節機能を設ければ
良く、またロールの場合には、ストリツプに対し
て押し込むことが可能な駆動ロールを用いれば良
い。 As means for changing the flow velocity in the gas jet, a damper may be used to adjust the air volume, and in the case of a roll, a drive roll that can be pushed against the strip may be used.
（実施例）
本発明による連続焼鈍炉１の概要を第１図に示
す。図示の例では入側から、予熱帯ａ、加熱帯ｂ
−１，ｂ−２、均熱帯ｄ、冷却帯ｅ−１，ｅ−
２，ｅ−３が設けられており、加熱帯ｂの途中に
板温制御ゾーンｃとして、ガスジエツト方式によ
る冷却帯を設置している。板温制御ゾーンｃの冷
却手段は応答性が早く、板温のコントロールが容
易にできる方式が望ましい。この方式として、ガ
スジエツトによる冷却あるいはロールを用いた冷
却の方法を用いることができるが図示の例ではガ
スジエツトによる冷却方式を採用した。この板温
制御ゾーンの働きは、ヒートサイクル、ラインス
ピード、板厚等の変更時に過加熱される鋼板の温
度を下げることにより加熱帯出口で目標の板温に
することである。(Example) FIG. 1 shows an outline of a continuous annealing furnace 1 according to the present invention. In the illustrated example, from the entrance side, the preheating zone a, the heating zone b
-1, b-2, soaking zone d, cooling zone e-1, e-
2 and e-3, and a cooling zone using a gas jet system is installed as a plate temperature control zone c in the middle of the heating zone b. It is desirable that the cooling means for the plate temperature control zone c has a quick response and a method that allows easy control of the plate temperature. As this method, a cooling method using a gas jet or a cooling method using a roll can be used, but in the illustrated example, a cooling method using a gas jet is adopted. The function of this plate temperature control zone is to lower the temperature of the steel plate, which is overheated when changing heat cycles, line speed, plate thickness, etc., to reach the target plate temperature at the exit of the heating zone.
第２図は従来の冷延鋼帯連続焼鈍炉の概要を示
し、第３図に従来の連続焼鈍炉を用いた時の加熱
帯出口までのヒートカーブを示す。第３図におい
て、Ａは厚さ1.0mm、幅1200mmの冷延鋼帯を
300mpmのラインスピードで焼鈍した時のヒート
カーブであり、Ｂは厚さ0.75mm、幅1200mmの冷延
鋼帯を300mpmで焼鈍した時のシートカーブであ
る。 FIG. 2 shows an outline of a conventional continuous annealing furnace for cold rolled steel strip, and FIG. 3 shows a heat curve up to the exit of the heating zone when the conventional continuous annealing furnace is used. In Figure 3, A is a cold-rolled steel strip with a thickness of 1.0 mm and a width of 1200 mm.
It is a heat curve when annealing at a line speed of 300 mpm, and B is a sheet curve when a cold rolled steel strip with a thickness of 0.75 mm and a width of 1200 mm is annealed at 300 mpm.
第３図に示す従来法による冷延鋼帯のヒートカ
ーブＡおよびＢを比較して明らかなように、冷延
鋼帯Ａ，Ｂを同一ラインスピードで焼鈍する場合
には、加熱帯の出口で約70℃の温度差があり、目
標板温、780℃+20 -0に対して、冷延鋼帯Ｂは50℃の
過加熱となる。 As is clear from a comparison of heat curves A and B of cold-rolled steel strips produced by the conventional method shown in Figure 3, when cold-rolled steel strips A and B are annealed at the same line speed, at the exit of the heating zone, There is a temperature difference of about 70°C, and cold rolled steel strip B is overheated by 50°C compared to the target plate temperature of 780°C +20 -0 .
また、第４図は従来の焼鈍方法において、加熱
帯の設定炉温Tgを950℃から850℃に変更した時
の加熱帯出口での板温Tsの変化を示す。炉温Tg
が850℃になるまでに約20分を要しており、板温
Tsが780℃から目標740℃+20 -0に低下するのに、炉
温と同様約20分を要している。 Moreover, FIG. 4 shows the change in the plate temperature T s at the exit of the heating zone when the set furnace temperature T g of the heating zone is changed from 950° C. to 850° C. in the conventional annealing method. Furnace temperature T g
It takes about 20 minutes for the plate temperature to reach 850℃.
It took about 20 minutes for T s to fall from 780°C to the target 740°C +20 -0 , similar to the furnace temperature.
これに対して、本発明方法によるヒートカーブ
を第５図に示す。図中Ｃは第３図のヒートカーブ
Ａと同様に厚さ1.0mm、幅1200mmの冷延鋼帯を
300mpmのラインスピードで焼鈍した時のヒート
カーブであり、Ｄは第３図のヒートカーブＢと同
様に厚さ0.75mm、幅1200mmの冷延鋼帯を300mpm
のラインスピードで焼鈍した時のヒートカーブに
示す。冷延鋼帯Ｄの板温を板温制御ゾーンＣにお
いて、610℃まで下げることによつて加熱帯出口
での板温は目標の780℃となる。また、溶接点が
加熱帯を通過した後で、ラインスピードｘを1.0t
×300mpm＝0.75×ｘ mpmとなる様に、変更す
れば、その後のヒートカーブは冷延鋼帯Ｃと同じ
曲線をえがく。 On the other hand, a heat curve according to the method of the present invention is shown in FIG. C in the figure shows a cold-rolled steel strip with a thickness of 1.0 mm and a width of 1200 mm, similar to heat curve A in Figure 3.
This is the heat curve when a cold rolled steel strip with a thickness of 0.75 mm and a width of 1200 mm is annealed at 300 mpm, similar to heat curve B in Figure 3.
The heat curve is shown when annealing at a line speed of . By lowering the plate temperature of the cold rolled steel strip D to 610°C in the plate temperature control zone C, the plate temperature at the outlet of the heating zone becomes the target 780°C. Also, after the welding point passes through the heating zone, the line speed x is set to 1.0 t.
If the heat curve is changed so that ×300 mpm = 0.75 × x mpm, the subsequent heat curve will be the same as that of cold rolled steel strip C.
また、第６図は加熱帯設定炉温が、950℃から
850℃に変更された時の炉温の変化をTgで、本発
明方法により制御された加熱帯出口板温をTsで、
板温制御ゾーン出口板温をTcでそれぞれ示す。
加熱帯炉温は従来法と同様950℃から850℃になる
のに約20分かかるが、板温制御ゾーン出口板温を
Tcで示す様にコントロールすることによつて熱
帯出口板温はTsで示すように遅れなしに目標温
度にコントロールすることができる。なお、板温
の制御方法としては、加熱帯出口の板温計による
フイードバツク制御を用いた。 In addition, Figure 6 shows that the heating zone setting furnace temperature is from 950℃.
T g is the change in furnace temperature when the temperature is changed to 850°C, T s is the plate temperature at the outlet of the heating zone controlled by the method of the present invention,
The plate temperature at the outlet of the plate temperature control zone is indicated by Tc .
It takes about 20 minutes for the heating zone furnace temperature to rise from 950°C to 850°C, as in the conventional method, but the plate temperature at the outlet of the plate temperature control zone
By controlling as shown by Tc , the tropical outlet plate temperature can be controlled to the target temperature without delay as shown by Ts . As a method of controlling the plate temperature, feedback control using a plate thermometer at the outlet of the heating zone was used.
以上により、加熱帯設定炉温を低温側に変更す
る場合につき制御ゾーンの作用を説明したが、高
温側に変更する場合も全く同様に制御することが
できる。 As described above, the operation of the control zone has been explained in the case where the heating zone setting furnace temperature is changed to the low temperature side, but the control can be performed in exactly the same way when the heating zone setting furnace temperature is changed to the high temperature side.
（発明の効果）
本発明によれば、加熱帯に、板温制御ゾーンを
設けることによつて、ヒートカーブの変更、ライ
ンスピードの変更、あるいは、板厚の変更に対し
ても容易に加熱帯出口板温を、目標温度にコント
ロールすることができ、従来発生していた操業の
繁雑さをなくして板厚偏差を例えば±50％にまで
広げることが可能となり、またダミーコイルの使
用をなくすことができるという効果が得られる。(Effects of the Invention) According to the present invention, by providing a plate temperature control zone in the heating zone, the heating zone can be easily adjusted to change the heat curve, line speed, or plate thickness. It is possible to control the outlet plate temperature to the target temperature, eliminate the complexity of operations that previously occurred, and increase the plate thickness deviation to, for example, ±50%, and also eliminate the use of dummy coils. This has the effect of being able to.
第１図は本発明による連続焼鈍炉の線図的縦断
面図、第２図は従来の連続焼鈍炉の線図的縦断面
図、第３図は従来法による加熱帯出口までの鋼帯
のヒートカーブを示すグラフ、第４図は従来法に
よる加熱帯出口板温の変化を示すグラフ、第５図
は本発明による加熱帯出口までの鋼帯のヒートカ
ーブを示すグラフ、第６図は本発明による加熱帯
出口および板温制御ゾーン出口での板温を示すグ
ラフである。
１……連続焼鈍炉、ａ……予熱帯、ｂ−１，ｂ
−２……加熱帯、ｃ……板温制御ゾーン、ｄ……
均熱帯、ｅ−１……冷却帯、ｅ−２……冷却帯
（過時効帯）、ｅ−３……冷却帯。
Fig. 1 is a schematic longitudinal cross-sectional view of a continuous annealing furnace according to the present invention, Fig. 2 is a schematic longitudinal cross-sectional view of a conventional continuous annealing furnace, and Fig. 3 is a schematic longitudinal cross-sectional view of a conventional continuous annealing furnace. A graph showing the heat curve; FIG. 4 is a graph showing changes in plate temperature at the exit of the heating zone according to the conventional method; FIG. 5 is a graph showing the heat curve of the steel strip up to the exit of the heating zone according to the present invention; FIG. FIG. 3 is a graph showing the plate temperatures at the outlet of the heating zone and the outlet of the plate temperature control zone according to the invention. FIG. 1... Continuous annealing furnace, a... Pre-heating zone, b-1, b
-2...Heating zone, c...Plate temperature control zone, d...
Soaking zone, e-1... cooling zone, e-2... cooling zone (overaging zone), e-3... cooling zone.
Claims (1)
インスピード、板厚等の変更に応じて、連続焼鈍
炉の加熱帯の途中において鋼帯をガスジエツト冷
却もしくはロール冷却により冷却して鋼帯の加熱
温度を目標温度に制御することを特徴とする鋼帯
の連続焼鈍方法。 ２ 鋼帯の連続焼鈍炉の加熱帯の途中に板温制御
ゾーンとしてのガスジエツト冷却帯もしくはロー
ル冷却帯を設けたことを特徴とする鋼帯の連続焼
鈍装置。[Claims] 1. During continuous annealing of the steel strip, the steel strip may be cooled by gas jet cooling or roll cooling in the middle of the heating zone of the continuous annealing furnace depending on changes in heat cycle, line speed, plate thickness, etc. A continuous annealing method for a steel strip characterized by controlling the heating temperature of the steel strip to a target temperature. 2. An apparatus for continuous annealing of steel strip, characterized in that a gas jet cooling zone or a roll cooling zone is provided as a plate temperature control zone in the middle of the heating zone of the continuous annealing furnace for steel strip.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60041788A JPS61201735A (en) | 1985-03-05 | 1985-03-05 | Method and apparatus for annealing steel strip continuously |
| EP85730150A EP0181830B1 (en) | 1984-11-08 | 1985-11-06 | Method and apparatus for heating a strip of metallic material in a continuous annealing furnace |
| DE8585730150T DE3583212D1 (en) | 1984-11-08 | 1985-11-06 | METHOD AND DEVICE FOR HEATING A METAL STRIP IN A CONTINUOUS FURNACE. |
| CA000494756A CA1246338A (en) | 1984-11-08 | 1985-11-07 | Method and apparatus for heating a strip of metallic material in a continuous annealing furnace |
| KR1019850008305A KR910001355B1 (en) | 1984-11-08 | 1985-11-07 | Method and apparatus for heating a strip of metallic material in a continous |
| AU49482/85A AU583317B2 (en) | 1984-11-08 | 1985-11-08 | Method and apparatus for heating a strip of metallic material in a continuous annealing furnace |
| US07/075,217 US4836774A (en) | 1984-11-08 | 1987-07-20 | Method and apparatus for heating a strip of metallic material in a continuous annealing furnace |
| US07/315,310 US4923396A (en) | 1984-11-08 | 1989-02-24 | Method and apparatus for heating a strip of metallic material in a continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60041788A JPS61201735A (en) | 1985-03-05 | 1985-03-05 | Method and apparatus for annealing steel strip continuously |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61201735A JPS61201735A (en) | 1986-09-06 |
| JPH052728B2 true JPH052728B2 (en) | 1993-01-13 |
Family
ID=12618084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60041788A Granted JPS61201735A (en) | 1984-11-08 | 1985-03-05 | Method and apparatus for annealing steel strip continuously |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61201735A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2590152B2 (en) * | 1987-12-04 | 1997-03-12 | 株式会社日立製作所 | Continuous melting plating and annealing equipment |
| JPH01287224A (en) * | 1988-05-12 | 1989-11-17 | Kawasaki Steel Corp | In-furnace temperature control method for continuous heat treatment furnace |
| JPH0830221B2 (en) * | 1988-06-30 | 1996-03-27 | 川崎製鉄株式会社 | Continuous heat treatment method for metal strip |
| JP5063934B2 (en) * | 2006-06-01 | 2012-10-31 | 新日本製鐵株式会社 | Heat treatment equipment using both heating and cooling |
| JPWO2023074467A1 (en) * | 2021-10-27 | 2023-05-04 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5760025A (en) * | 1980-09-30 | 1982-04-10 | Nippon Steel Corp | Method for controlling plate temperature |
| JPS60128221A (en) * | 1983-12-15 | 1985-07-09 | Mitsubishi Heavy Ind Ltd | Method and device for controlling temperature of cooling furnace for continuous annealing installation |
| JPS61117227A (en) * | 1984-11-13 | 1986-06-04 | Mitsubishi Heavy Ind Ltd | Heating method of continuous annealing furnace for metallic strip |
-
1985
- 1985-03-05 JP JP60041788A patent/JPS61201735A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5760025A (en) * | 1980-09-30 | 1982-04-10 | Nippon Steel Corp | Method for controlling plate temperature |
| JPS60128221A (en) * | 1983-12-15 | 1985-07-09 | Mitsubishi Heavy Ind Ltd | Method and device for controlling temperature of cooling furnace for continuous annealing installation |
| JPS61117227A (en) * | 1984-11-13 | 1986-06-04 | Mitsubishi Heavy Ind Ltd | Heating method of continuous annealing furnace for metallic strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61201735A (en) | 1986-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |