JP2000204489A - Control of pickling condition - Google Patents
Control of pickling conditionInfo
- Publication number
- JP2000204489A JP2000204489A JP11004122A JP412299A JP2000204489A JP 2000204489 A JP2000204489 A JP 2000204489A JP 11004122 A JP11004122 A JP 11004122A JP 412299 A JP412299 A JP 412299A JP 2000204489 A JP2000204489 A JP 2000204489A
- Authority
- JP
- Japan
- Prior art keywords
- pickling
- steel strip
- scale
- amount
- cold rolling
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱延鋼帯の酸洗に際し
酸洗不足，過酸洗を防止し良好な表面状態をもつ酸洗材
を得る酸洗条件の制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling pickling conditions for preventing insufficient pickling and over pickling during pickling of a hot-rolled steel strip and obtaining a pickling material having a good surface condition.
【０００２】[0002]
【従来の技術】熱延鋼帯は、表面に酸化物を主体とする
スケールが形成されている。スケールは下地のＦｅに比
較すると硬質で、スケールが付着したままの鋼帯を冷間
圧延すると疵発生等の原因になる。そこで、冷延工程に
入る前に、熱延鋼帯を酸洗浴に通板し、スケールを酸洗
除去している。熱延工程から送られてきた鋼帯を連続的
に酸洗槽に通板する連続酸洗では、各酸洗槽に収容され
ている酸液の濃度が酸洗された鋼帯の表面性状に大きな
影響を与える。たとえば、濃度の高い酸液を用いて酸洗
した鋼帯には、過酸洗による肌荒れが発生しやすい。濃
度の低い酸液を用いた酸洗では、酸洗不足に起因してス
ケール残渣が鋼帯表面に残留しやすく、また一定した表
面状態に仕上げるためには通板速度を遅くせざるを得な
いこともある。2. Description of the Related Art Scales mainly composed of oxides are formed on the surface of a hot-rolled steel strip. The scale is harder than the underlying Fe, and cold rolling of the steel strip with the scale attached causes flaws and the like. Therefore, before entering the cold rolling process, the hot-rolled steel strip is passed through a pickling bath to remove scale by pickling. In continuous pickling, in which the steel strip sent from the hot rolling process is continuously passed through a pickling tank, the concentration of the acid solution contained in each pickling tank changes the surface properties of the pickled steel strip. Have a big impact. For example, in a steel strip pickled using an acid solution having a high concentration, rough surface due to peracid cleaning is likely to occur. In pickling using a low-concentration acid solution, scale residues tend to remain on the steel strip surface due to insufficient pickling, and the passing speed must be slowed to achieve a uniform surface condition Sometimes.
【０００３】酸液の濃度は、このように表面品質，生産
能率に大きな影響を与えることから、要求される酸洗仕
上材の表面状態に応じた設定値になるように制御されて
いる。酸液濃度の制御には、酸洗槽中にある酸液の酸濃
度やＦｅ濃度を測定し、測定結果から求められた必要量
の酸液を補充する方法，酸洗槽を通過する鋼帯の表面積
に比例した量の酸液を補充する方法等がある。[0003] Since the concentration of the acid solution greatly affects the surface quality and production efficiency in this manner, it is controlled to a set value corresponding to the required surface condition of the pickling finish. To control the concentration of the acid solution, a method of measuring the acid concentration or Fe concentration of the acid solution in the pickling tank and replenishing the required amount of the acid solution obtained from the measurement results, a steel strip passing through the pickling tank. A method of replenishing an acid solution in an amount proportional to the surface area.
【０００４】[0004]
【発明が解決しようとする課題】酸濃度及びＦｅ濃度の
測定結果から求められた量の酸液を補充する方法では、
測定に時間がかかるためタイムラグが避けられない。た
とえば、ＮａＯＨ，Ｋ2ＣｒＯ7 の滴定法でＦｅ濃度を
測定する場合、測定結果を得るまでに１０分以上かか
り、通常の操業条件下でその間に酸洗槽を通過する鋼帯
の長さは２０００ｍにも達する。この長さぶんだけ制御
にバラツキが生じ、鋼帯が過酸洗され又は酸洗が不足す
る虞れがあり、歩留を低下させる原因になる。In a method of replenishing an amount of an acid solution obtained from the measurement results of the acid concentration and the Fe concentration,
Time lag is inevitable due to the time required for measurement. For example, when measuring the Fe concentration by the titration method of NaOH and K 2 CrO 7 , it takes 10 minutes or more to obtain the measurement result. Under normal operating conditions, the length of the steel strip passing through the pickling tank during that time is as follows. It reaches 2000m. There is a risk that the steel strip may be over-pickled or the pickling may be insufficient, resulting in a reduction in yield.
【０００５】他方、酸洗される鋼帯の表面積から算出さ
れた補充量で酸濃度を制御する場合、鋼帯表面に形成さ
れているスケール層が一定厚みで地鉄に対する密着性も
一定であることを前提とする。しかし、実際に酸洗され
る鋼帯は、熱延条件の変動に応じてスケール層の厚みや
密着性が替わる。そのため、適正条件下で酸洗されてい
るとは限らず、過酸洗，酸洗不足の発生を防止できな
い。特に酸洗前の冷間圧延でメカニカルデスケーリング
した熱延鋼帯では、スケール層に一部剥離及び密着性低
下が生じており、酸洗負荷が大幅に軽減されているた
め、通常の条件下で酸洗すると過酸洗になり易い。この
ような鋼帯の酸洗にあっては、メカニカルデスケーリン
グ条件によって酸消費量が大きく変わり、濃度変動も大
きくなる。On the other hand, when the acid concentration is controlled by the replenishment amount calculated from the surface area of the steel strip to be pickled, the scale layer formed on the surface of the steel strip has a constant thickness and the adhesion to the ground iron is constant. It is assumed that However, in the steel strip actually pickled, the thickness and adhesion of the scale layer change according to the change in the hot rolling conditions. Therefore, pickling is not always performed under appropriate conditions, and it is not possible to prevent occurrence of over-pickling or insufficient pickling. In particular, in hot-rolled steel strip mechanically descaled by cold rolling before pickling, the scale layer has partially peeled off and reduced adhesion, and the pickling load has been greatly reduced, so that under normal conditions When pickling with, it is easy to perform over pickling. In such pickling of a steel strip, the amount of acid consumption changes greatly depending on the mechanical descaling conditions, and the concentration fluctuation also increases.
【０００６】[0006]
【課題を解決するための手段】本発明は、このような問
題を解消すべく案出されたものであり、メカニカルデス
ケーリング条件に基づいて酸洗負荷を算出し、算出結果
に応じた量の酸液を投入することにより、一定した表面
品質をもつ鋼帯を安定的に製造することを目的とする。
本発明の酸洗条件制御方法は、その目的を達成するた
め、冷間圧延及びブラッシングによりメカニカルデスケ
ーリングされた鋼帯を酸洗槽に通板して酸洗する際、鋼
帯の板幅，通板速度，冷間圧延条件及びブラッシング条
件を演算器に入力し、冷間圧延前の熱延鋼帯に付着して
いるスケール量からメカニカルデスケーリングで除去さ
れるスケール量を差し引いて酸洗槽に持ち込まれるスケ
ール量を演算し、該スケール量に対応する酸液が酸洗槽
に保持されるように酸液を補充することを特徴とする。SUMMARY OF THE INVENTION The present invention has been devised to solve such a problem, and calculates an acid pickling load on the basis of a mechanical descaling condition. An object of the present invention is to stably produce a steel strip having a constant surface quality by introducing an acid solution.
In order to achieve the object, the pickling condition control method of the present invention provides a method for controlling a steel strip which has been mechanically descaled by cold rolling and brushing to pass through a pickling tank for pickling. Feeding speed, cold rolling conditions and brushing conditions are input to the calculator, and the amount of scale removed by mechanical descaling is subtracted from the amount of scale adhering to the hot-rolled steel strip before cold rolling. The amount of scale brought into the tank is calculated, and the acid solution is replenished so that the acid solution corresponding to the scale amount is held in the pickling tank.
【０００７】[0007]
【実施の形態】冷間圧延によるメカニカルデスケーリン
グでは、図１に示すようにスケール層が形成されている
熱延鋼帯Ｓ1 を冷間圧延機１に送り込む。熱延鋼帯Ｓ1
が冷間圧延機１で冷間圧延される際、熱延鋼帯Ｓ1 の表
面にあるスケール層もワークロール１W で圧下される。
圧下により地鉄は塑性変形するが、比較的硬質のスケー
ル層は地鉄の塑性変形に追従できず、クラック，界面剥
離等が生じ地鉄に対するスケール層の密着性が低下す
る。密着性は、伸び率１〜５％程度のテンションレベリ
ングによっても低下する。そのため、冷間圧延機に替え
てテンションレベラーを使用することもできる。そこ
で、本発明においては、テンションレベリングを包含す
る意味で「冷間圧延」を使用する。スケール層は、冷間
圧延によっても地鉄から一部剥離するが、冷間圧延機１
の下流側に設けられているブラシで鋼帯表面をブラッシ
ングすることにより大半が鋼帯表面から分離除去され
る。The mechanical descaling according Embodiment] cold rolling, feeding the hot rolled strip S 1 of the scale layer is formed as shown in FIG. 1 in the cold rolling mill 1. Hot rolled steel strip S 1
There when it is cold-rolled in the cold rolling mill 1, the scale layer on the surface of the hot rolled strip S 1 is also reduction in the work roll 1 W.
Although the base metal is plastically deformed by the reduction, the relatively hard scale layer cannot follow the plastic deformation of the base iron, and cracks, interfacial delamination, etc. occur, and the adhesion of the scale layer to the base iron is reduced. Adhesion is also reduced by tension leveling at an elongation of about 1 to 5%. Therefore, a tension leveler can be used instead of a cold rolling mill. Therefore, in the present invention, "cold rolling" is used to include tension leveling. Although the scale layer is partially peeled from the base steel by cold rolling, the cold rolling mill 1
Most of the steel strip surface is separated from the steel strip surface by brushing the steel strip surface with a brush provided downstream of the steel strip.
【０００８】メカニカルデスケーリングされた鋼帯Ｓ2
は、次いで酸洗槽３に送り込まれ、酸洗槽３に収容され
ている酸液によって酸洗される。鋼帯Ｓ2 に付着してい
るスケール層の密着性はメカニカルデスケーリングによ
って低下しているため酸洗負荷は、熱延鋼帯Ｓ1 を酸洗
槽３に直送する従来法に比較して大幅に軽減される。し
かし、スケールの密着性、換言すれば酸洗の難易度は、
メカニカルデスケーリング条件に支配される。そこで、
冷間圧延機１からミル条件（冷間圧延条件）を、ブラシ
２からブラッシング条件を演算器４に取り込む。演算器
４には、被酸洗材である鋼帯Ｓ2 の板幅及びラインスピ
ードが予め入力されており、鋼帯表面にあるスケール層
の酸洗除去に必要な酸補給量を演算する。[0008] Mechanically descaled steel strip S 2
Is then sent to the pickling tank 3, where it is pickled by the acid solution contained in the pickling tank 3. Pickling load the adhesion of the scale layer adhering to the steel strip S 2 is decreased by a mechanical descaling is considerably compared to the conventional methods of direct a hot rolled strip S 1 to pickling tank 3 To be reduced. However, the adhesion of the scale, in other words, the difficulty of pickling,
It is governed by mechanical descaling conditions. Therefore,
The mill conditions (cold rolling conditions) from the cold rolling mill 1 and the brushing conditions from the brush 2 are taken into the arithmetic unit 4. The arithmetic unit 4 is input plate width and line speed of the steel strip S 2 as an object to be pickled material in advance, calculates the acid supply amount required for pickling removal of the scale layer on the steel strip surface.
【０００９】たとえば、塩酸を使用した酸洗では、酸洗
槽３内で次の反応に従って鋼帯Ｓ2が酸洗される。この
うち、反応式（３）による反応が最も早く、酸洗に必要
な酸量は酸洗槽３に送り込まれるスケール量に相当する
量で十分である。 Ｆｅ2 Ｏ3 ＋６Ｈ+ →２Ｆｅ3+＋３Ｈ2 Ｏ ・・・・（１） Ｆｅ3 Ｏ4 ＋８Ｈ+ →Ｆｅ2+＋２Ｆｅ3+＋４Ｈ2 Ｏ ・・・・（２） ＦｅＯ＋２Ｈ+ →Ｆｅ3+＋Ｈ2 Ｏ ・・・・（３） Ｆｅ＋２Ｈ+ →Ｆｅ2+＋Ｈ2 ・・・・（４） スケール量は、酸洗槽３に送り込まれる鋼帯Ｓ2 の表面
積及びメカニカルデスケーリングで除去されるスケール
量によって定まる。For example, in pickling using hydrochloric acid, the steel strip S 2 is pickled in the pickling tank 3 according to the following reaction. Among them, the reaction according to the reaction formula (3) is the fastest, and the amount of acid necessary for pickling is an amount corresponding to the amount of scale fed into the pickling tank 3 is sufficient. Fe 2 O 3 + 6H + → 2Fe 3+ + 3H 2 O (1) Fe 3 O 4 + 8H + → Fe 2+ + 2Fe 3+ + 4H 2 O (2) FeO + 2H + → Fe 3+ + H 2 O ··· (3) Fe + 2H + → Fe 2+ + H 2 ··· (4) The scale amount is the surface area of the steel strip S 2 fed into the pickling tank 3 and the scale removed by mechanical descaling. Determined by quantity.
【００１０】鋼帯Ｓ2 の表面積Ｓ（ｍ2 ）は、幅をｔ
（ｍ），ラインスピードをＶ（ｍ／分）とするとき、Ｓ
＝ｔ×Ｖで求められる。この表面積Ｓに係数αを掛けた
値が熱延前の鋼帯Ｓ1 に付着しているスケール量Ｘ1 で
ある。係数αは、鋼種及び熱延条件により予め求められ
ている。メカニカルデスケーリングで除去される量Ｘ2
は、過去の実績を基にして冷間圧延機１での圧延条件及
びブラッシング条件から演算できる。たとえば、圧下率
３０％以上で冷間圧延すると鋼帯表面から８０％以上の
スケールが除去され、圧下率３〜５％では５〜２０％程
度のスケールが除去される。また、ブラシ２の押付け力
及び回転数を上げるとブラッシングにより鋼帯Ｓ2 の表
面から除去されるスケール量が増加するが、このときの
スケール除去量とブラッシング条件との相関関係を過去
の実績から求めておき、その相関関係に応じてブラッシ
ング条件からスケール除去量を演算する。The surface area S (m 2 ) of the steel strip S 2 has a width t
(M), when the line speed is V (m / min), S
= T × V. The value obtained by multiplying the surface area S by the coefficient α is the scale amount X 1 attached to the steel strip S 1 before hot rolling. The coefficient α is obtained in advance according to the type of steel and hot rolling conditions. Amount X 2 removed by mechanical descaling
Can be calculated from rolling conditions and brushing conditions in the cold rolling mill 1 based on past results. For example, when cold rolling is performed at a rolling reduction of 30% or more, 80% or more of the scale is removed from the steel strip surface, and at a rolling reduction of 3 to 5%, about 5 to 20% of the scale is removed. Although amount of scale to be removed from the surface of the steel strip S 2 by brushing Increasing the pressing force and the rotational speed brush 2 increases, the correlation between the scale removal amount and brushing conditions in the past achievements The scale removal amount is calculated from the brushing condition according to the correlation.
【００１１】このようにして、冷間圧延及びブラッシン
グのメカニカルデスケーリングで除去されるスケール量
Ｘ2 が求められ、酸洗槽３に持ち込まれるスケール量Ｘ
がＸ＝Ｘ1 −Ｘ2 と算出される。次いで、スケール量Ｘ
に対応する酸量Ｙ1 を求め、酸洗槽３の酸量Ｙ2 と比較
し、差ΔＹ（＝Ｙ1 −Ｙ2 ）に応じて流量調整弁５の開
度を調節する。その結果、必要とする酸量Ｙ1 が酸洗槽
３に確保され、酸洗槽３の酸濃度が一定に保たれ、スケ
ール付着量Ｘの鋼帯Ｓ2 が適正条件下で酸洗され、過酸
洗，酸洗不足等のない良好な表面肌をもつ酸洗鋼帯Ｓ3
が得られる。In this manner, the scale amount X 2 removed by the mechanical descaling of cold rolling and brushing is obtained, and the scale amount X brought into the pickling tank 3 is obtained.
Is calculated as X = X 1 −X 2 . Then, the scale amount X
Determine the amount of acid Y 1 corresponding to, compared to the amount of acid Y 2 of San'araiso 3, regulates the opening of flow control valve 5 according to the difference ΔY (= Y 1 -Y 2) . As a result, acid amount Y 1 required by the reserved San'araiso 3, acid concentration San'araiso 3 is kept constant, the steel strip S 2 of the scale deposition amount X is pickled under proper conditions, Pickled steel strip S 3 with good surface texture without excessive pickling or insufficient pickling
Is obtained.
【００１２】[0012]
【実施例】板幅１０００ｍｍ，板厚３ｍｍの普通鋼熱延
鋼帯を圧下率３０％で冷間圧延し、冷間圧延機を出た鋼
帯の両面に直径４３０ｍｍの砥粒入りナイロンブラシ２
本を対向させ、押込み量３ｍｍ，回転速度１２００ｒｐ
ｍで鋼帯をブラッシングした。使用した熱延鋼帯は冷間
圧延前に３１ｇ／ｍ2 のスケールが付着しており、メカ
ニカルデスケーリングで鋼帯表面から除去されたスケー
ル量は２５ｇ／ｍ2であり、酸洗槽に持ち込まれるスケ
ール量が６ｇ／ｍ2 と算出された。酸洗槽に１３０ｍ
3 ，濃度１２％の酸液が確保されるように流量１８リッ
トル／分で塩酸濃度１８％の酸液を補充しながら、メカ
ニカルデスケーリングされた鋼帯をラインスピード２０
０ｍ／分で酸洗槽に送り込み酸洗した。酸洗された鋼帯
の表面を観察したところ、過酸洗，酸洗不足等が検出さ
れず良好な表面肌をもつ酸洗材であった。EXAMPLE A hot rolled steel strip with a width of 1000 mm and a thickness of 3 mm was cold-rolled at a rolling reduction of 30%.
With the books facing each other, the pushing amount is 3 mm and the rotation speed is 1200 rpm
The steel strip was brushed at m. The used hot-rolled steel strip had a scale of 31 g / m 2 adhered before cold rolling. The amount of scale removed from the steel strip surface by mechanical descaling was 25 g / m 2 , and was brought into the pickling tank. The calculated amount of scale was 6 g / m 2 . 130m in pickling tank
3 , while replenishing the acid solution with a hydrochloric acid concentration of 18% at a flow rate of 18 liters / minute so as to secure the acid solution of a concentration of 12%, the mechanically descaled steel strip is processed at a line speed of 20%.
It was sent to a pickling tank at 0 m / min and pickled. Observation of the surface of the pickled steel strip revealed that the pickling material had good surface skin without over-pickling or insufficient pickling.
【００１３】冷間圧延の圧下率を５％に変えた外は同じ
条件下でメカニカルデスケーリングし、酸洗した。この
場合のメカニカルデスケーリングによって除去されるス
ケール量は６ｇ／ｍ2 と算出されたので、酸液の補充量
を流量７５リットル／分に増加させて酸洗したところ、
過酸洗，酸洗不足等のない良好な表面肌をもつ酸洗材が
得られた。比較のため、酸液の流量を変えることなく酸
洗したところ、酸洗槽内の酸濃度が低下し、残存スケー
ルに起因する酸洗不足が散見された。[0013] The mechanical descaling was performed under the same conditions except that the rolling reduction of the cold rolling was changed to 5%, followed by pickling. Since the amount of scale removed by mechanical descaling in this case was calculated to be 6 g / m 2 , pickling was performed by increasing the replenishment amount of the acid solution to a flow rate of 75 liter / min.
An acid pickling material having a good surface without any over pickling or insufficient pickling was obtained. For comparison, when pickling was performed without changing the flow rate of the acid solution, the acid concentration in the pickling tank was reduced, and insufficient pickling caused by the residual scale was observed.
【００１４】[0014]
【発明の効果】以上に説明したように、本発明において
は、メカニカルデスケーリング条件に応じて酸洗槽の酸
濃度を調整しながら鋼帯を酸洗しているので、過酸洗，
酸洗不足等のない良好な表面肌をもつ酸洗材が得られ
る。しかも、冷間圧延及びブラッシングによるメカニカ
ルデスケーリングの長所を生かし、酸洗負荷が大幅に軽
減されるため、酸原単位の向上も図れる。As described above, in the present invention, the steel strip is pickled while the acid concentration in the pickling tank is adjusted in accordance with the mechanical descaling conditions.
An acid pickling material having good surface skin without insufficient pickling can be obtained. Moreover, the advantage of mechanical descaling by cold rolling and brushing is utilized, and the pickling load is greatly reduced, so that the acid unit consumption can be improved.
【図１】 本発明が適用される製造ラインFIG. 1 is a production line to which the present invention is applied
１：冷間圧延機 ２：ブラシ ３：酸洗槽 ４：
演算器 ５：流量調整弁 Ｓ1 ：熱延鋼帯 Ｓ2 ：メカニカルデスケーリングされた熱延鋼帯 Ｓ3 ：酸洗された熱延鋼帯1: Cold rolling mill 2: Brush 3: Pickling tank 4:
Calculator 5: flow rate adjustment valve S 1: hot rolled strip S 2: mechanical descaling has been hot rolled strip S 3: pickled hot rolled strip
Claims (1)
カルデスケーリングされた鋼帯を酸洗槽に通板して酸洗
する際、鋼帯の板幅，通板速度，冷間圧延条件及びブラ
ッシング条件を演算器に入力し、冷間圧延前の熱延鋼帯
に付着しているスケール量からメカニカルデスケーリン
グで除去されるスケール量を差し引いて酸洗槽に持ち込
まれるスケール量を演算し、該スケール量に対応する酸
液が酸洗槽に保持されるように酸液を補充する酸洗条件
の制御方法。When a steel strip mechanically descaled by cold rolling and brushing is passed through a pickling tank and pickled, the strip width, the passing speed, the cold rolling conditions and the brushing conditions of the steel strip are determined. Input to the calculator, subtract the amount of scale removed by mechanical descaling from the amount of scale attached to the hot-rolled steel strip before cold rolling, calculate the amount of scale brought into the pickling tank, and calculate the amount of scale A method for controlling pickling conditions for replenishing an acid solution such that the acid solution corresponding to the above is held in a pickling tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11004122A JP2000204489A (en) | 1999-01-11 | 1999-01-11 | Control of pickling condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11004122A JP2000204489A (en) | 1999-01-11 | 1999-01-11 | Control of pickling condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000204489A true JP2000204489A (en) | 2000-07-25 |
Family
ID=11575994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11004122A Withdrawn JP2000204489A (en) | 1999-01-11 | 1999-01-11 | Control of pickling condition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000204489A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920739A (en) * | 2014-03-27 | 2014-07-16 | 中冶南方工程技术有限公司 | Method for producing products by replacing cold by using heat with low acid consumption and high surface quality |
| CN103920741A (en) * | 2014-03-27 | 2014-07-16 | 中冶南方工程技术有限公司 | Low-consumption method for producing products with corrosion resistance and high surface quality by replacing cold-rolling by hot-rolling |
| CN103920710A (en) * | 2014-03-27 | 2014-07-16 | 中冶南方工程技术有限公司 | Production method of low-consumption corrosion-resistant cold-rolled product |
| CN103920737A (en) * | 2014-03-27 | 2014-07-16 | 中冶南方工程技术有限公司 | Method for eliminating oxide on surface of band steel of carbon steel |
| KR20200040534A (en) * | 2018-10-10 | 2020-04-20 | 주식회사 포스코 | Post-treatment equipment for annealing line and control method thereof |
-
1999
- 1999-01-11 JP JP11004122A patent/JP2000204489A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920739A (en) * | 2014-03-27 | 2014-07-16 | 中冶南方工程技术有限公司 | Method for producing products by replacing cold by using heat with low acid consumption and high surface quality |
| CN103920741A (en) * | 2014-03-27 | 2014-07-16 | 中冶南方工程技术有限公司 | Low-consumption method for producing products with corrosion resistance and high surface quality by replacing cold-rolling by hot-rolling |
| CN103920710A (en) * | 2014-03-27 | 2014-07-16 | 中冶南方工程技术有限公司 | Production method of low-consumption corrosion-resistant cold-rolled product |
| CN103920737A (en) * | 2014-03-27 | 2014-07-16 | 中冶南方工程技术有限公司 | Method for eliminating oxide on surface of band steel of carbon steel |
| CN103920741B (en) * | 2014-03-27 | 2016-08-17 | 中冶南方工程技术有限公司 | A kind of anti-corrosion great surface quality of low consumption with heat for cold product processes |
| KR20200040534A (en) * | 2018-10-10 | 2020-04-20 | 주식회사 포스코 | Post-treatment equipment for annealing line and control method thereof |
| KR102175836B1 (en) * | 2018-10-10 | 2020-11-06 | 주식회사 포스코 | Post-treatment equipment for annealing line and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20060404 |