JP3203581B2 - Continuous annealing equipment for steel strip - Google Patents
Continuous annealing equipment for steel stripInfo
- Publication number
- JP3203581B2 JP3203581B2 JP50038594A JP50038594A JP3203581B2 JP 3203581 B2 JP3203581 B2 JP 3203581B2 JP 50038594 A JP50038594 A JP 50038594A JP 50038594 A JP50038594 A JP 50038594A JP 3203581 B2 JP3203581 B2 JP 3203581B2
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- roll
- furnace
- continuous annealing
- rolls
- 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 - Lifetime
Links
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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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)
- Control Of Heat Treatment Processes (AREA)
Description
【発明の詳細な説明】 技術分野 本発明は、冷間圧延後の鋼帯の連続焼鈍設備に関す
る。Description: TECHNICAL FIELD The present invention relates to a continuous annealing facility for a steel strip after cold rolling.
ここで鋼帯とは連続焼鈍後必要に応じて錫メッキ、亜
鉛メッキ等を施し、最終的には缶類、鋼製家具、自動車
等の製造に供されるものを言う。Here, the steel strip refers to a steel strip which is subjected to tin plating, galvanizing or the like as necessary after continuous annealing, and is finally provided for the production of cans, steel furniture, automobiles and the like.
背景技術 （従来の技術） 一般に連続焼鈍設備の炉内における鋼帯の張力は、ウ
ォークやフラッタリング防止の目的からは大きく程良
く、一方ヒートバックル防止の目的からはこの張力は小
さい程よい。BACKGROUND ART (Prior Art) Generally, the tension of a steel strip in a furnace of a continuous annealing facility is preferably large for the purpose of preventing walk and fluttering, while the tension is preferably small for the purpose of preventing heat buckle.
この相反する要求のため、通常の操業では鋼帯が高温
となる加熱炉や均熱炉では鋼帯の張力を小さくし、鋼帯
の温度が比較的低い冷却炉や過時効炉では、張力を大き
くすることが行なわれている。Due to these conflicting requirements, the tension in the steel strip is reduced in heating furnaces and soaking furnaces where the temperature of the steel strip is high in normal operation, and in cooling furnaces and overage furnaces where the temperature of the steel strip is relatively low. Bigger things are going on.
このような張力分布は、ハースロールの速度を微細に
調整／制御することにより得られるが、張力を炉内のあ
る点で急激に変化させたい場合は、炉内にブライドルロ
ールを設けることが一般的である。Such a tension distribution can be obtained by finely adjusting / controlling the speed of the hearth roll. However, when it is desired to change the tension abruptly at a certain point in the furnace, a bridle roll is generally provided in the furnace. It is a target.
図１はこの一例を示す図面であり、各炉内に供給され
る鋼帯１を入側から出側へと案内する如く各炉内に配設
されたハースロール３からなるロール群と加熱炉４、均
熱炉５を通過した鋼帯１が高速度のガス噴流にさらされ
る急冷炉６に入る直前にブライドルロール２とが設けら
れており、鋼帯１の張力はブライドルロール２通過後大
きな値となって、後続の急冷炉６、過時効炉７、最終冷
却炉８を通過する。FIG. 1 is a drawing showing an example of this, in which a roll group consisting of hearth rolls 3 arranged in each furnace so as to guide a steel strip 1 supplied into each furnace from an inlet side to an outlet side, and a heating furnace 4. A bridle roll 2 is provided immediately before the steel strip 1 that has passed through the soaking furnace 5 enters the quenching furnace 6 that is exposed to a high-speed gas jet, and the tension of the steel strip 1 is large after passing through the bridle roll 2. It passes through the following quenching furnace 6, overaging furnace 7, and final cooling furnace 8.
（解決しようとする課題） さてこのような目的のために設けられたブライドルロ
ール２及びハースロール３は、当然鋼帯１を確実に拘束
し、スリップを生じてはならないことは言うまでもな
い。しかしながら現実には、特に鋼帯厚が小さくなる
と、このブライドルロール２及びハースロール３はしば
しばスリップを生じ、本来の機能を発揮しない事実が見
出された。(Problem to be Solved) It goes without saying that the bridle roll 2 and the hearth roll 3 provided for such a purpose must surely restrain the steel strip 1 and cause no slip. However, in reality, it has been found that the bridle roll 2 and the hearth roll 3 often slip, especially when the thickness of the steel strip is reduced, so that they do not perform their original functions.
本発明はかかる問題点を解決し、ブライドルロール及
びハースロールの機能を充分に発揮して焼鈍炉の安定操
業を図る鋼帯の連続焼鈍設備を提供する。The present invention solves such a problem, and provides a continuous annealing facility for a steel strip in which the functions of a bridle roll and a hearth roll are sufficiently exhibited to stably operate an annealing furnace.
発明の開示 上記問題点を解決するため、本発明は以下の（１）〜
（５）項記載の設備を採用する。DISCLOSURE OF THE INVENTION In order to solve the above problems, the present invention provides the following (1) to
The equipment described in (5) is adopted.
（１）炉内に供給される鋼帯を入側から出側へと案内す
る如く炉内に配設されたロール群を有する鋼帯の連続焼
鈍設備において、該ロール群中の少なくとも１本のロー
ルのロール入側を鋼帯の単位張力をσ１、出側の単位張
力をσ２、鋼帯の厚みをｈ、該ロールの直径をＤとする
とき、下記式（Ｉ）で表される面圧ｐが10kpa（キロパ
スカル）以上となるような直径Ｄのロールを備えた鋼帯
の連続焼鈍設備。(1) In a continuous annealing facility for a steel strip having a group of rolls arranged in the furnace so as to guide the steel strip supplied into the furnace from the entrance side to the exit side, at least one of the roll groups is provided. When the unit tension of the steel strip is σ1, the unit tension of the output side is σ2, the thickness of the steel strip is h, and the diameter of the roll is D, the surface pressure represented by the following formula (I) Continuous annealing equipment for steel strip provided with rolls of diameter D such that p is 10 kpa (kilopascal) or more.
ｐ＝ｈ（σ１＋σ２）/D （Ｉ） （２）前記ロール群中の少なくとも１本のロールがブラ
イドルロールである前記（１）項記載の設備。p = h (σ1 + σ2) / D (I) (2) The facility according to the above (1), wherein at least one roll in the roll group is a bridle roll.
（３）前記ロール群中の少なくとも１本のロールがハー
スロールである前記（１）項記載の設備。(3) The equipment according to (1), wherein at least one roll in the roll group is a hearth roll.
（４）炉内に供給される鋼帯を入側から出側へと案内す
る如く炉内に配設されたロール群を有する鋼帯の連続焼
鈍設備において、該ロール群中のブライドルロール入側
の鋼帯の単位張力をσ１、出側の単位張力をσ２、鋼帯
の厚みをｈ、該ブライドルロールの直径をＤとすると
き、下記式（Ｉ）で表される面圧ｐが10kPa以上となる
ような直径Ｄのブライドルロールを備えた鋼帯の連続焼
鈍設備。(4) In a continuous annealing facility for a steel strip having a group of rolls arranged in the furnace so as to guide the steel strip supplied into the furnace from the entrance side to the exit side, the entrance side of the bridle roll in the group of rolls When the unit tension of the steel strip is σ1, the unit tension on the exit side is σ2, the thickness of the steel strip is h, and the diameter of the bridle roll is D, the surface pressure p represented by the following formula (I) is 10 kPa or more. Continuous annealing equipment for a steel strip provided with a bridle roll having a diameter D such that:
ｐ＝ｈ（σ１＋σ２）/D （Ｉ） （５）炉内に供給される鋼帯を入側から出側へと案内す
る如く炉内に配設されたロール群を有する鋼帯の連続焼
鈍設備において、該ロール群中のハースロール入側の鋼
帯の単位張力をσ１、出側の単位張力をσ２、鋼帯の厚
みをｈ、該ハースロールの直径をＤとするとき、下記式
（Ｉ）で表される面圧ｐが10kPa以上となるような直径
Ｄのハースロールを備えた鋼帯の連続焼鈍設備。p = h (σ1 + σ2) / D (I) (5) Continuous annealing equipment for steel strip having a group of rolls arranged in the furnace so as to guide the steel strip supplied into the furnace from the inlet side to the outlet side In the group of rolls, when the unit tension of the steel strip on the entrance side of the hearth roll in the roll group is σ1, the unit tension on the exit side is σ2, the thickness of the steel strip is h, and the diameter of the hearth roll is D, the following equation (I ) Is a continuous annealing equipment for a steel strip provided with a hearth roll having a diameter D such that the surface pressure p expressed by the formula (1) becomes 10 kPa or more.
ｐ＝ｈ（σ１＋σ２）/D （Ｉ） （作用） 工学的には、図２に示すようにブライドルロール２の
入側張力をT1、出側張力をT2、鋼帯１のブライドルロー
ル2a、2b、2cへと巻き付き角をθ（＝θ１＋θ２＋θ
３）、摩擦係数をμとすると、スリップを発生させない
最大張力T2は下記（II）式で表される。p = h (σ1 + σ2) / D (I) (Function) Engineeringly, as shown in FIG. 2, the entrance tension of the bridle roll 2 is T1, the exit tension is T2, and the bridle rolls 2a, 2b of the steel strip 1 are shown. , 2c, the winding angle is θ (= θ1 + θ2 + θ
3) Assuming that the friction coefficient is μ, the maximum tension T2 at which no slip occurs is expressed by the following equation (II).
T2＝T1・exp（μθ） （II） 換言すれば、張力倍率T2/T1はパラメータμθによっ
て一義的に定まり、張力の絶対値には関係しない。しか
るに現実の炉内ブライドルロールにおいては、この張力
倍率は同じでも張力の絶対値が小さくなるとスリップを
生じやすくなる。即ち、摩擦係数μは張力の影響を受け
ると考えられる。T2 = T1 · exp (μθ) (II) In other words, the tension magnification T2 / T1 is uniquely determined by the parameter μθ and has no relation to the absolute value of the tension. However, in an actual in-furnace bridle roll, a slip is likely to occur when the absolute value of the tension is reduced even if the tension ratio is the same. That is, it is considered that the friction coefficient μ is affected by the tension.
なお、ブライドルロールの本数に制限はなく、１本で
もよい。本数は（II）式を逆算したθから決まる。The number of bridle rolls is not limited, and may be one. The number is determined from θ obtained by calculating back the equation (II).
実際の連続焼鈍炉にて、径の異なるハースロールやブ
ライドルロールについて、そのスリップ発生限界におけ
る摩擦係数を測定した結果、図３に示すように摩擦係数
は、Ｄをブライドルロール径、Ｗを鋼帯の幅とすると、
下記（III）式に示す面圧ｐの関数となっていることが
判った。In an actual continuous annealing furnace, the friction coefficient at the slip occurrence limit was measured for hearth rolls and bridle rolls having different diameters. As shown in FIG. 3, the friction coefficient was D for the bridle roll diameter and W for the steel strip. The width of
It was found that the function was a function of the surface pressure p shown in the following equation (III).
ｐ＝（T1＋T2）／（DW） （III） 重要な事実として、図３から明らかなように、面圧ｐ
＝10kPa付近に摩擦係数の遷移点がある。（以下この遷
移点における面圧を限界面圧pcと呼ぶこととする） 面圧がpc以上の領域ではブライドルロールおよびハー
スロールは鋼帯を正常に拘束した状態にあり、pc以下の
領域ではスリップ状態、即ち摩擦は動摩擦状態にある。
ブライドルロール及びハースロールを正常に機能させる
ためには、この面圧がpc以上となるようにその径を定め
なければならない。p = (T1 + T2) / (DW) (III) As an important fact, as apparent from FIG.
= There is a transition point of the coefficient of friction near 10 kPa. (Hereinafter, the contact pressure at this transition point will be referred to as the critical contact pressure pc.) In the region where the contact pressure is pc or more, the bridle roll and the hearth roll are in a state where the steel strip is normally restrained, and in the region where pc or less, slip occurs. The state, ie, friction, is in a kinetic friction state.
In order for the bridle roll and the hearth roll to function properly, the diameter of the bridle roll and the hearth roll must be determined so that the surface pressure is equal to or higher than pc.
なおハースロールは一般的に鋼帯の張力を変化させる
ことなく搬送することを目的とする。しかるに図３から
分かるように面圧10kPa以下では動摩擦状態となってお
りハースロール前後の僅少な張力差によっても滑りを発
生していることを、本発明者は見出した。張力差がほと
んどないのに滑ると言う現象は一見不思議であるが、ハ
ースロールを駆動するモーターの制御装置は鋼帯の真の
速度を知る手段を一般にもたないためロール周速を指令
値（ブライドルロール周速に同じ）に制御するためこの
ような現象が起こる。またロール周速も高温の炉内で熱
膨張したハースロール径が正確に分からないため指令通
りにはならないことがこの現象を助長する。このような
滑りの存在は鋼帯への疵発生、あるいは永続的な滑りに
よりハースロール表面へのビルドアップ（鉄分のいぼ状
の固着、これも鋼帯の疵原因となる。）の発生となるの
で本発明の技術を応用し限界面圧以上となるよう適正な
ロール径の選定をしてこの問題を解決することが出来
る。The hearth roll is generally intended to be conveyed without changing the tension of the steel strip. However, as can be seen from FIG. 3, the present inventor has found that at a surface pressure of 10 kPa or less, a dynamic friction state occurs, and slippage occurs due to a slight difference in tension between before and after the hearth roll. At first glance, the phenomenon of slipping with little difference in tension is strange, but the control device of the motor that drives the hearth roll has no means for knowing the true speed of the steel strip. This phenomenon occurs because the control is performed at the same speed as the bridle roll peripheral speed). In addition, the roll peripheral speed does not become as instructed because the diameter of the hearth roll thermally expanded in the high-temperature furnace is not accurately known, which promotes this phenomenon. The existence of such a slip causes a flaw in the steel strip or a build-up on the surface of the hearth roll due to permanent slip (iron wart-like fixation, which also causes a flaw in the steel strip). Therefore, the problem of the present invention can be solved by applying the technique of the present invention and selecting an appropriate roll diameter so as to be equal to or higher than the limit surface pressure.
さて通常の操業は、鋼帯の単位張力σが一定となるよ
うに行なわれるので、張力Ｔ＝σhWの関係を用いて（II
I）式を書き直すと（IV）式のようになる。Now, the normal operation is performed so that the unit tension σ of the steel strip is constant, and therefore, the relation of tension T = σhW is used (II
Rewriting equation (I) gives equation (IV).
ｐ＝ｈ（σ１＋σ２）/D （IV） 図面の簡単な説明 図１は本発明を適用する炉内ブライドルロール及びハ
ースロールの配置例を示す略側面図である。p = h (σ1 + σ2) / D (IV) Brief Description of the Drawings FIG. 1 is a schematic side view showing an arrangement example of a bridle roll and a hearth roll in a furnace to which the present invention is applied.
図２はブライドルロールへの鋼帯の巻き付き角と張力
との関係を一般的に説明する図面である。FIG. 2 is a drawing generally illustrating the relationship between the winding angle of the steel strip around the bridle roll and the tension.
図３は本発明の基礎データであるブライドルロール及
びハースロールの面圧と摩擦係数との関係を求めた実測
値を示す図面である。FIG. 3 is a drawing showing measured values obtained by determining the relationship between the surface pressure of the bridle roll and the hearth roll, which are basic data of the present invention, and the friction coefficient.
発明を実施するための形態 以下に実施例を示す。DESCRIPTION OF EMBODIMENTS Embodiments will be described below.
実施例１ 上述の知見に基づいたブライドルロールの設計例を以
下に示す。Example 1 An example of a bridle roll design based on the above findings will be described below.
ブライドルロール入側における鋼帯の単位張力σ１＝
0.7kg/mm2,出側の単位張力σ２＝1.2kg/mm2,鋼帯の厚み
ｈ＝0.25mm,ロール数＝３本，各ロールにおける巻き付
き角＝180度、各ロールにおける張力倍率は一定（＝σ2
/σ１＝1.2）とし、（IV）式に限界面圧pc＝10kPaを代
入してそれぞれのロール径D1,D2,D3を求めると、D1＝39
0mm,D2＝460mm,D3＝550mmとなる。Unit tension of steel strip at the entrance side of bridle roll σ1 =
0.7 kg / mm 2 , output side unit tension σ2 = 1.2 kg / mm 2 , steel strip thickness h = 0.25 mm, number of rolls = 3, winding angle of each roll = 180 degrees, tension ratio of each roll is constant (= Σ2
/σ1=1.2), and substituting the critical surface pressure pc = 10 kPa into the equation (IV) to obtain the roll diameters D1, D2, and D3, D1 = 39
0 mm, D2 = 460 mm, and D3 = 550 mm.
実際にはそれぞれのロルー径が異なるのは、製作上も
保守上も面倒であるので、安全側をみて全てのロール径
を390mm以下とする。Actually, each roll has a different diameter, which is troublesome in manufacturing and maintenance. Therefore, all roll diameters should be 390 mm or less from the viewpoint of safety.
なお図３に示すデータは、鋼製の滑らかに仕上げられ
たブライトルロール及びハースロールのものであり、ラ
イン速度は350〜600mpmの条件において得られたもので
ある。In addition, the data shown in FIG. 3 are for a brightly finished steel roll and hearth roll made of steel, and obtained at a line speed of 350 to 600 mpm.
実施例２ 上述の知見に基づいたハースロールの設計例を以下に
示す。ハースロールではその前後の張力は一般に同一
（σ１＝σ２）であるが、スリップ発生防止の条件とし
てはブライドルロール同様（IV）式を適用することがで
きる。Embodiment 2 A design example of a hearth roll based on the above findings will be described below. In the hearth roll, the tension before and after the hearth roll is generally the same (σ1 = σ2), but the condition (IV) similar to the bridle roll can be applied as a condition for preventing the occurrence of slip.
σ１＝σ２＝0.7kg/mm2、鋼帯の厚みｈ＝0.25mmとす
るロール径Ｄ＝350mm以下となる。σ1 = σ2 = 0.7 kg / mm 2 , the thickness of the steel strip h = 0.25 mm, and the roll diameter D = 350 mm or less.
ブライドルロール又はハースロールの表面仕上げ粗度
やライン速度が大きく異なれば、図３により定まる限界
面圧pcは変化する可能性があるが、ブライドルロール径
又はハースロール径を限界面圧以上となるように定める
という基本的な考え方には変わりない。If the surface finish roughness or line speed of the bridle roll or hearth roll is significantly different, the critical surface pressure pc determined by FIG. 3 may change, but the bridle roll diameter or the hearth roll diameter is set to be equal to or greater than the critical surface pressure. It does not change to the basic idea of stipulating.
なお面圧ｐを、スリップを発生させない限界値とする
ようロール径を選ぶという考え方は、上述のようにブラ
イドルロールのみならず全てのハースロールにも適用出
来るものである。The concept of selecting the roll diameter so that the surface pressure p is set to a limit value at which no slip occurs can be applied not only to the bridle roll but also to all hearth rolls as described above.
ラジアントチューブを備えた加熱炉のように、設備の
寸法制御上ハースロール径を小さく出来ない場合は、該
ハースロールに鋼帯の搬送に必要なトルク以上の過剰な
駆動力を加えないようハースロールの制御系の設計およ
び調整に配慮する、例えば炉共通の速度指令に対して、
一定値（数mpm）以上の速度誤差を生じないようリミッ
トをかける。または適正な垂下特性をもたせる等も本発
明が示唆する重要な技術知見である。If the diameter of the hearth roll cannot be reduced due to the dimensional control of the equipment, such as a heating furnace equipped with a radiant tube, the hearth roll should not be subjected to excessive driving force exceeding the torque required to transport the steel strip to the hearth roll. Consider the design and adjustment of the control system of, for example, for the speed command common to the furnace,
A limit is set so that a speed error of a certain value (several mpm) or more does not occur. Also, giving an appropriate drooping characteristic is an important technical finding suggested by the present invention.
産業上の利用可能性 以上説明したように、本発明の技術を適用することに
より、連続焼鈍炉内に設けられたブライドルロール及び
ハースロールに、その本来機能である鋼帯の張力増幅作
用を確実に発揮せしめることが出来、鋼帯の連続焼鈍炉
の高度な安定操業が達成出来る。また鋼帯とロールのス
リップによる疵発生という重大な欠陥も防止することが
できる。INDUSTRIAL APPLICABILITY As described above, by applying the technology of the present invention, the bridle roll and the hearth roll provided in the continuous annealing furnace can reliably increase the tension amplifying action of the steel strip, which is its original function. And a high degree of stable operation of the continuous annealing furnace for steel strip can be achieved. In addition, it is possible to prevent a serious defect such as generation of a flaw due to slip between the steel strip and the roll.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C21D 9/52 - 11/00 105 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 7 , DB name) C21D 9/52-11/00 105
Claims (5)
案内する如く炉内に配設されたロール群を有する鋼帯の
連続焼鈍設備において、該ロール群中の少なくとも１本
のロールのロール入側を鋼帯の単位張力をσ１、出側の
単位張力をσ２、鋼帯の厚みをｈ、該ロールの直径をＤ
とするとき、下記式（Ｉ）で表される面圧ｐが10kpa
（キロパスカル）以上となるような直径Ｄのロールを備
えた鋼帯の連続焼鈍設備。 ｐ＝ｈ（σ１＋σ２）/D （Ｉ）In a continuous annealing facility for a steel strip having a group of rolls arranged in a furnace so as to guide a steel strip supplied into the furnace from an inlet side to an outlet side, at least one of the roll groups is provided. The unit entrance tension of the steel strip is σ1, the unit tension of the exit side is σ2, the thickness of the steel strip is h, and the diameter of the roll is D.
When the surface pressure p represented by the following formula (I) is 10 kpa
(Kpascals) continuous annealing equipment for steel strip provided with a roll having a diameter D of not less than (kPa). p = h (σ1 + σ2) / D (I)
がブライドルロールである請求項（１）記載の設備。2. The facility according to claim 1, wherein at least one of the rolls is a bridle roll.
がハースロールである請求項（１）記載の設備。3. The facility according to claim 1, wherein at least one of the rolls is a hearth roll.
案内する如く炉内に配設されたロール群を有する鋼帯の
連続焼鈍設備において、該ロール群中のブライドルロー
ル入側の鋼帯の単位張力をσ１、出側の単位張力をσ
２、鋼帯の厚みをｈ、該ブライドルロールの直径をＤと
するとき、下記式（Ｉ）で表される面圧ｐが10kPa以上
となるような直径Ｄのブライドルロールを備えた鋼帯の
連続焼鈍設備。 ｐ＝ｈ（σ１＋σ２）/D （Ｉ）4. A continuous annealing apparatus for a steel strip having a group of rolls disposed in the furnace so as to guide the steel strip supplied into the furnace from the inlet side to the outlet side, wherein bridle rolls in the group of rolls are provided. The unit tension of the entrance steel strip is σ1, and the unit tension of the exit side is σ.
2. Assuming that the thickness of the steel strip is h and the diameter of the bridle roll is D, a steel strip provided with a bridle roll having a diameter D such that the surface pressure p represented by the following formula (I) is 10 kPa or more is obtained. Continuous annealing equipment. p = h (σ1 + σ2) / D (I)
案内する如く炉内に配設されたロール群を有する鋼帯の
連続焼鈍設備において、該ロール群中のハースロール入
側の鋼帯の単位張力をσ１、出側の単位張力をσ２、鋼
帯の厚みをｈ、該ハースロールの直径をＤとするとき、
下記式（Ｉ）で表される面圧ｐが10kPa以上となるよう
な直径Ｄのハースロールを備えた鋼帯の連続焼鈍設備。 ｐ＝ｈ（σ１＋σ２）/D （Ｉ）5. A continuous annealing apparatus for a steel strip having a group of rolls disposed in a furnace so as to guide a steel strip supplied into the furnace from an inlet side to an outlet side, wherein a hearth roll in the group of rolls is provided. When the unit tension of the steel strip on the entry side is σ1, the unit tension on the exit side is σ2, the thickness of the steel strip is h, and the diameter of the hearth roll is D,
Continuous annealing equipment for a steel strip provided with a hearth roll having a diameter D such that the surface pressure p represented by the following formula (I) is 10 kPa or more. p = h (σ1 + σ2) / D (I)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15624392 | 1992-05-25 | ||
| JP4-156243 | 1992-05-25 | ||
| PCT/JP1993/000633 WO1993024664A1 (en) | 1992-05-25 | 1993-05-13 | Equipment for continuously annealing steel strips |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPWO1993024664A1 JPWO1993024664A1 (en) | 1994-06-02 |
| JP3203581B2 true JP3203581B2 (en) | 2001-08-27 |
Family
ID=15623509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50038594A Expired - Lifetime JP3203581B2 (en) | 1992-05-25 | 1993-05-13 | Continuous annealing equipment for steel strip |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0613958B1 (en) |
| JP (1) | JP3203581B2 (en) |
| KR (1) | KR960006583B1 (en) |
| CN (1) | CN1028880C (en) |
| DE (1) | DE69329272T2 (en) |
| WO (1) | WO1993024664A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4495553B2 (en) * | 2004-09-10 | 2010-07-07 | 新日本製鐵株式会社 | Steel sheet fluttering suppression method |
| CN100467628C (en) * | 2006-05-31 | 2009-03-11 | 福建方明钢铁有限公司 | Annealing process and annealing furnace for continuous hot galvanizing production of strip steel |
| TWI504757B (en) | 2011-09-30 | 2015-10-21 | Nippon Steel & Sumitomo Metal Corp | High strength molten galvanized steel sheet and its manufacturing method |
| KR101654158B1 (en) * | 2013-07-15 | 2016-09-09 | 주식회사 포스코 | Apparatus for heating slow cooling section in continuous annealing furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US30933A (en) | 1860-12-18 | Improvement in harvesting-machines | ||
| US4296919A (en) | 1980-08-13 | 1981-10-27 | Nippon Steel Corporation | Apparatus for continuously producing a high strength dual-phase steel strip or sheet |
| JP5943979B2 (en) | 2013-09-30 | 2016-07-05 | コンチネンタル オートモーティブ システムズ インコーポレイテッドＣｏｎｔｉｎｅｎｔａｌ Ａｕｔｏｍｏｔｉｖｅ Ｓｙｓｔｅｍｓ， Ｉｎｃ． | Lighting assembly for display lighting |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA948530A (en) * | 1969-12-30 | 1974-06-04 | Bunichiro Kawasaki | Method and apparatus for producing low carbon cold-rolled steel |
| JPS607693B2 (en) * | 1979-10-31 | 1985-02-26 | 川崎製鉄株式会社 | Continuous annealing method for steel strip |
| JPS5943979B2 (en) * | 1979-10-31 | 1984-10-25 | 川崎製鉄株式会社 | Furnace tension control method |
| JPS56163224A (en) * | 1980-05-16 | 1981-12-15 | Nippon Steel Corp | Tension controller for metalllic strip |
| JPH03173721A (en) * | 1989-11-30 | 1991-07-29 | Toshiba Corp | Device for controlling strip tension in continuous heat treatment furnace |
-
1993
- 1993-05-13 EP EP93910337A patent/EP0613958B1/en not_active Expired - Lifetime
- 1993-05-13 DE DE69329272T patent/DE69329272T2/en not_active Expired - Lifetime
- 1993-05-13 WO PCT/JP1993/000633 patent/WO1993024664A1/en not_active Ceased
- 1993-05-13 JP JP50038594A patent/JP3203581B2/en not_active Expired - Lifetime
- 1993-05-13 KR KR1019930703730A patent/KR960006583B1/en not_active Expired - Lifetime
- 1993-05-24 CN CN93106243A patent/CN1028880C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US30933A (en) | 1860-12-18 | Improvement in harvesting-machines | ||
| US4296919A (en) | 1980-08-13 | 1981-10-27 | Nippon Steel Corporation | Apparatus for continuously producing a high strength dual-phase steel strip or sheet |
| JP5943979B2 (en) | 2013-09-30 | 2016-07-05 | コンチネンタル オートモーティブ システムズ インコーポレイテッドＣｏｎｔｉｎｅｎｔａｌ Ａｕｔｏｍｏｔｉｖｅ Ｓｙｓｔｅｍｓ， Ｉｎｃ． | Lighting assembly for display lighting |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0613958A4 (en) | 1996-10-23 |
| KR940701456A (en) | 1994-05-28 |
| EP0613958A1 (en) | 1994-09-07 |
| DE69329272T2 (en) | 2001-02-08 |
| CN1028880C (en) | 1995-06-14 |
| WO1993024664A1 (en) | 1993-12-09 |
| EP0613958B1 (en) | 2000-08-23 |
| DE69329272D1 (en) | 2000-09-28 |
| KR960006583B1 (en) | 1996-05-20 |
| CN1080661A (en) | 1994-01-12 |
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