JPS6050123A - Cooling method of high-temperature steel sheet - Google Patents

Cooling method of high-temperature steel sheet

Info

Publication number
JPS6050123A
JPS6050123A JP15989283A JP15989283A JPS6050123A JP S6050123 A JPS6050123 A JP S6050123A JP 15989283 A JP15989283 A JP 15989283A JP 15989283 A JP15989283 A JP 15989283A JP S6050123 A JPS6050123 A JP S6050123A
Authority
JP
Japan
Prior art keywords
cooling
zone
temperature
water
steel plate
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
Application number
JP15989283A
Other languages
Japanese (ja)
Other versions
JPH0450368B2 (en
Inventor
Masakazu Nakao
中尾 正和
Akinori Otomo
朗紀 大友
Takeshi Tanaka
毅 田中
Yoshikazu Oobanya
嘉一 大番屋
Akira Kobayashi
章 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP15989283A priority Critical patent/JPS6050123A/en
Publication of JPS6050123A publication Critical patent/JPS6050123A/en
Publication of JPH0450368B2 publication Critical patent/JPH0450368B2/ja
Granted legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54Furnaces for treating strips or wire
    • C21D9/56Continuous furnaces for strip or wire
    • C21D9/573Continuous furnaces for strip or wire with cooling

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

PURPOSE:To prevent generation of cooling strain by segmenting a cooling zone to plurality in the passing direction of a steel sheet, providing a cooling change zone at the intermediate and controlling the cooling before and after said cooling change zone. CONSTITUTION:A high-temp. steel sheet is passed in one direction and is passed through a cooling zone having water cooling means from the top and bottom surfaces to cool said sheet successively from the front end side in the passing direction thereof to the rear end side of said direction. The cooling zone is segmented to plural cooling zones having different spraying distributions of the cooling water in the direction (transverse direction) perpendicular to the passing direction of the sheet with respect to the passing direction. A cooling change zone in the spraying distribution of the cooling water in the tranverse direction is provided to the intermediate cooling zone among the segmented cooling zones and the controlled cooling is performed before and after said cooling change zone.

Description

【発明の詳細な説明】 本発明は、熱間圧延された高温鋼板をその上下面から水
冷却する方法の改良に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for water cooling a hot-rolled high-temperature steel plate from its upper and lower surfaces.

この種の冷却方法は、技術的に難易度が高く、解決すべ
きテーマが多く、当業界にお、いて各方面から種々の研
究、開発がなされ、又、実用に供されているものもある
This type of cooling method is technically difficult and there are many issues to be solved, and various research and developments have been carried out from various fields in this industry, and some have been put into practical use. .

即ち、板厚方向、表面〜中心〜裏面で、冷速か一様でな
いため、座屈波、反シ等の変形が起シやすいこと。
That is, since the cooling speed is not uniform in the thickness direction, from the front surface to the center to the back surface, deformations such as buckling waves and curling waves are likely to occur.

板幅が広いため、上面に大量の板上水が溜シ、流出する
ため、上下面及び幅方向の冷却均一性がくずれやすく、
座屈波、反シ等の変形が生じゃすいこと。
Because the plate width is wide, a large amount of water on the plate accumulates on the top surface and flows out, making it easy for the cooling uniformity on the top and bottom surfaces and in the width direction to deteriorate.
Deformations such as buckling waves and anti-shielding should not occur.

圧延鋼板は、温度、サイズ(プレートクラウン等)、形
状、表面性状が均一でなく、冷却のバラツキが生じやす
いこと。
Rolled steel plates are not uniform in temperature, size (plate crown, etc.), shape, and surface texture, and are prone to variations in cooling.

等々の解決すべきテーマが多いものである。There are many topics that need to be resolved.

ところで、高温鋼板のオンライン制御冷却において、従
来技術の現状を第1図(a) (b)を参照して説明す
ると、第1図(a)は、板幅方向の冷却水分布をつけず
に、冷却した場合を示しており、これでは室温時の鋼板
形状は図示の通り、耳部が変形するのである。
By the way, in the online controlled cooling of high-temperature steel plates, the current state of the prior art will be explained with reference to Figures 1 (a) and (b). , which shows the case of cooling, in which the shape of the steel plate at room temperature is deformed at the edges as shown in the figure.

この冷却歪防止対策として、第1図(b)で示す如く、
板幅方向の冷却水分布を、板端側の方が少ない分布をつ
けることによって、冷却開始温度、即ち、冷却前の鋼板
幅方向温度分布が約800 ’Cがら、冷却停止温度、
即ち、冷却後の銅板幅方向温度分布、約550℃までの
冷却では大きな冷却歪が発生しないものとなる。
As a measure to prevent this cooling distortion, as shown in Fig. 1(b),
By changing the distribution of cooling water in the width direction of the sheet so that the distribution is smaller on the sheet edge side, the cooling start temperature, that is, the temperature distribution in the width direction of the steel sheet before cooling, is approximately 800'C, while the cooling stop temperature,
That is, in the temperature distribution in the width direction of the copper plate after cooling, no large cooling strain occurs when cooling to about 550°C.

ところで、冷却停止温度をよシ低くすると、第2図に示
す如く冷却歪が太きくな9、製品として不良となるばか
りでなく、ホットレベラにかけることができないという
ような操業トラブルとなるのである。
By the way, if the cooling stop temperature is set too low, the cooling distortion becomes large as shown in FIG. 29, which not only results in a defective product but also causes operational troubles such as the inability to use a hot leveler.

一方、材質側から見ると、第8図で示す如く、機械的性
質と冷却停止温度の関係がある。
On the other hand, when viewed from the material side, as shown in FIG. 8, there is a relationship between mechanical properties and cooling stop temperature.

即ち、冷却停止温度を下けると、降伏応力(YS)、引
張応力(TS)の向上となるのであシ、また、Oaqの
低下は添加成分の減少にっながシ、溶接性の向上となる
等のメリットが大きいことになる。
In other words, lowering the cooling stop temperature improves the yield stress (YS) and tensile stress (TS), and lowering the Oaq also leads to a reduction in additive components, which improves weldability. There will be great benefits such as:

即ち、Oe’qを低下させ、かつ、冷却停止温度を低く
することで、機械的性質を満足する材料が製造できるこ
とになる。
That is, by lowering Oe'q and lowering the cooling stop temperature, a material that satisfies mechanical properties can be manufactured.

なお、第8図の成分表は次の通シである。The composition table in FIG. 8 is as follows.

斯様に、Oeqを低下させ、かつ、冷却停止温度を低く
することは有効ではあるけれども、前述の如く冷却歪発
生という問題があシ、冷却停止温度を550℃以下に低
下するには限界がある。
Although it is effective to lower the Oeq and the cooling stop temperature in this way, there is the problem of cooling distortion as mentioned above, and there is a limit to lowering the cooling stop temperature to 550°C or less. be.

即ち、厚板工場を考えた場合、約500’Cで冷却を停
止し、ホットレベラで矯正すれば、平坦度良好な鋼板が
製造できるが、それ以下の停止温度にて冷却を停止した
場合、従来技術にあっては以下の理由で製造が不可能で
ある。
In other words, when considering a plate factory, if cooling is stopped at about 500'C and straightened with a hot leveler, steel plates with good flatness can be produced, but if cooling is stopped at a lower temperature than that, conventional Technically, manufacturing is impossible for the following reasons.

■ たとえば、300℃のときには、ホットレベラ前で
鋼板は変形しておシ、強力な矯正が必要であるとともに
、たとえ、平坦に矯正が可能であっても、鋼板に大きな
不均一温度分布が生じているため、鋼板を室温まで冷却
したとき、形状不良となる。
■ For example, at 300°C, the steel plate deforms before the hot leveler, requiring strong straightening, and even if straightening is possible, a large uneven temperature distribution will occur in the steel plate. Therefore, when the steel plate is cooled to room temperature, it becomes defective in shape.

■ 室温近くまで冷却した場合、鋼板温度分布は均一に
近いが、冷却過程に生じた変形は大きく、かつ、鋼板強
度が高くなるため矯正が十分できず形状不良となる。
■ When the steel plate is cooled to near room temperature, the temperature distribution of the steel plate is nearly uniform, but the deformation that occurs during the cooling process is large and the strength of the steel plate increases, so that it cannot be straightened sufficiently and the shape becomes defective.

第4図、第5図を参照して従来例を今一度説明すると、
第4図において、(A)は幅方向水量分布でアシ、注水
分布はエツジ側の方が水量が少ない分布とされている。
The conventional example will be explained once again with reference to FIGS. 4 and 5.
In FIG. 4, (A) shows the water volume distribution in the width direction, and the water injection distribution shows that the water volume is smaller on the edge side.

(B)は幅方向温度分布であp、約り00℃→約550
℃→約800℃→100℃→室温で示されておIC、(
0)は鋼板形状を示し、(D)はホットレベラである。
(B) is the temperature distribution in the width direction, p, approximately 00℃→approximately 550℃
℃→about 800℃→100℃→room temperature IC, (
0) shows the shape of the steel plate, and (D) shows the hot leveler.

即ち、第4図において、幅方向水量分布体)で、冷却開
始温度約SOO℃から約550℃にて冷却停止温度とす
ることによシ、第4図にて示す如くホットレベラ(D)
にかけ、空冷すれば室温における鋼板形状は正常となる
が、これでは、冷却停止温度が差程低いものでないため
、機械的性質、Oeqの点で十分満足するものといえな
い。
That is, by setting the cooling stop temperature from the cooling start temperature of about SOO°C to about 550°C in the widthwise water flow distribution body (in Fig. 4), the hot leveler (D) is heated as shown in Fig. 4.
If the steel sheet is air-cooled, the shape of the steel sheet at room temperature becomes normal, but since the cooling stop temperature is not that low, it cannot be said to be fully satisfactory in terms of mechanical properties and Oeq.

而して、幅方向水量分布(A)のままで約800℃の冷
却開始温度、約550℃での冷却停止温度、約800℃
での冷却停止温度にすれば、ホットレベラにかける前で
変形が生じこれを矯正できたとじても空冷すると変形す
るので4.9、又、ホットレベラでは矯正できないもの
となるのである。
Therefore, with the water flow distribution in the width direction (A) as it is, the cooling start temperature is about 800°C, the cooling stop temperature is about 550°C, and the cooling temperature is about 800°C.
If the cooling stop temperature is set to 4.9, deformation will occur before being applied to the hot leveler, and even if this can be corrected, it will deform when air cooled, and it will not be possible to correct it with a hot leveler.

この原因は、鋼板に注水した冷却水の冷却と、冷却後の
水が鋼板上を流れていくときの冷却をめてみると、第5
図の関係が明らかとなシ、又、この結果は、第4図にて
示す如く約500℃以下の冷却では、幅方向の注水分布
をつけていることが逆に幅方向温度分布の不均一を招く
ことになるからである。
The reason for this is the cooling of the cooling water poured into the steel plate and the cooling when the cooled water flows over the steel plate.
The relationship shown in the figure is clear, and this result also shows that for cooling below about 500°C, as shown in Figure 4, the water injection distribution in the width direction causes an uneven temperature distribution in the width direction. This is because it will invite

ところで、上記現象、知見に鑑み、Oeqを低下し、か
つ、冷却停止温度を低くしても、冷却歪の発生を少なく
するには、高温鋼板を水冷却する過程で、冷却開始温度
と冷却停止温度との範囲を複数の温度域に区分し、各区
分の温度域に対応して鋼板幅方向の冷却水注水パメーン
を変更しつつ冷却することが有利である。
By the way, in view of the above phenomena and knowledge, in order to reduce the occurrence of cooling distortion even if the Oeq is lowered and the cooling stop temperature is lowered, it is necessary to adjust the cooling start temperature and cooling stop temperature in the process of water cooling a high temperature steel plate. It is advantageous to divide the temperature range into a plurality of temperature ranges and perform cooling while changing the cooling water injection parameters in the width direction of the steel plate in accordance with each temperature range.

しかしながら、この手段によれば、冷却装置における上
部ヘッダ及び下部ヘッダ、特に、上部ヘッダの構造を各
注水パータンに合致させた所謂−斉注水パターンにする
必要があり、複雑な構造の上部ヘッダを作る必要がある
という不具合があ夛、又、設備長さが長くなるとともに
、冷却装置の所謂バンク上が長大になるという不具合が
ある。
However, according to this method, it is necessary to make the structure of the upper header and lower header in the cooling device, especially the upper header, into a so-called simultaneous water injection pattern that matches each water injection pattern, which creates an upper header with a complicated structure. In addition, there are problems in that the length of the equipment becomes longer and the so-called bank top of the cooling device becomes longer.

そこで本発明は、熱間圧延された高温鋼板を一方向に通
板し先端側より順に冷却する場合において、冷却ゾーン
を通板方向に複数個に区分し、その冷却ゾーンのうち、
中間に冷却変更ゾーンを設け、該冷却変更ゾーンの前後
において制御することによって、従来の問題点を改良し
つつ、設備長さを短くし、バンク長を短くできながら上
部ヘッダの構造は各バンク毎で共用できるようにしたも
のである。
Therefore, in the present invention, when a hot-rolled high-temperature steel plate is passed in one direction and cooled sequentially from the tip side, the cooling zone is divided into a plurality of sections in the passing direction, and among the cooling zones,
By providing a cooling change zone in the middle and controlling before and after the cooling change zone, the problems of the conventional method can be improved, the equipment length can be shortened, and the bank length can be shortened, while the structure of the upper header can be changed for each bank. It is made so that it can be shared.

即ち、今、鋼板を冷却するのに使用する冷却水供給ヘッ
ダ総数をITとすれば、冷却パターン変更開始位置ヘッ
ダナンバN1をNi=[:NTXτ’/rt)によって
めることにより、制御するのである。
That is, if the total number of cooling water supply headers used to cool the steel plate is IT, control is performed by setting the cooling pattern change start position header number N1 by Ni=[:NTXτ'/rt). be.

以下、図面を参照して本発明の実施例を詳述すると、第
6図は冷却設備全体の概要が例示されており、熱間圧延
された高温鋼板(1)は矢示方向に通板され、通板方向
に複数個にわたって、本例では8個に区分された入側冷
却ゾーン(2)、中間冷却ゾーン(3)、出側冷却ゾー
ン(4)に区分された冷却装置に先端側よシ後端側に順
に冷却されるようになっている。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Fig. 6 shows an overview of the entire cooling equipment, in which a hot-rolled high-temperature steel plate (1) is passed in the direction of the arrow. , the cooling device is divided into eight in this example, an inlet cooling zone (2), an intermediate cooling zone (3), and an outlet cooling zone (4), over a plurality of sections in the sheet threading direction. Cooling is performed sequentially toward the rear end.

各冷却ゾーン(2) (3) (4)は第10図で示す
如く、上部ヘッダ用給水管(5)にそれぞれのゾーンを
入切するバタ弁、三方切換弁等の切換手段(6) (7
) (8)を備え、更に、各ゾーン(2) (3) (
4)の上部ヘッダ(9) QOa力にはスプレーノズル
、ラミナーノズル等のノズル手段(2)03α冶が備え
られ、中間の冷却ゾーン(3)の上部ヘッダα0には別
の切換手段(2)を介してノズル手段α0が設けられて
いる。
As shown in Fig. 10, each cooling zone (2) (3) (4) has a switching means (6) such as a butterfly valve or a three-way switching valve that turns each zone on and off in the upper header water supply pipe (5). 7
) (8), and each zone (2) (3) (
The upper header (9) of 4) is equipped with nozzle means (2) 03α, such as a spray nozzle, laminar nozzle, etc., and the upper header α0 of the intermediate cooling zone (3) is equipped with another switching means (2) A nozzle means α0 is provided via the nozzle means α0.

又、冷却ゾーン(2) (3) (4)の下部ヘッダ用
給水管αりには各切換手段[181us )を介して上
部ヘッダと対応する下部ヘッダf2Dc221(ハ)が
備えられ、各下部ヘッダ!211@■にはスプレーノズ
ル(241(251(至)が備えられている。
In addition, a lower header f2Dc221 (c) corresponding to the upper header is provided in the water supply pipe α for the lower header of the cooling zones (2), (3), and (4) via each switching means [181us], and each lower header ! 211@■ is equipped with a spray nozzle (241 (251)).

ところで、中間の冷却ゾーン(3)の上部ヘッダ(In
は例えば第8図に示す如く上下2段構造とされ、上段ヘ
アピンノズルは第9図(1)の如く配列され、図中、黒
丸の印で示す如く穴づめ可能とされ、下段ヘアピンノズ
ルは第9図(2)の如く配列され、図中、黒丸の印で示
す如く穴づめ可能とされている。
By the way, the upper header (In
For example, as shown in FIG. 8, the hairpin nozzles are arranged in two stages, upper and lower, as shown in FIG. They are arranged as shown in Figure 9 (2), and can be drilled as shown by the black circles in the figure.

ここで、上部ヘッダ配列は上下2段構造に限らず、同一
高さに配列してもよい。
Here, the upper header arrangement is not limited to the upper and lower two-tier structure, but may be arranged at the same height.

即ち、通常、注水パターンの変更は冷却装置の中間で生
じるため、本実施例では入側冷却ゾーン(2)、出側冷
却ゾーン(4)は単一構造のヘッダ構造とされているの
であるのに対し、中間冷却ゾーン(3)のヘッダは第8
図の如く上下2段構造とされているのである。
That is, since the water injection pattern usually changes in the middle of the cooling device, in this embodiment, the inlet cooling zone (2) and the outlet cooling zone (4) have a single header structure. On the other hand, the header of the intermediate cooling zone (3) is
As shown in the figure, it has a two-stage structure, upper and lower.

而して、第7図を参照して冷却開始から終了までのフロ
ーチャートを説明する。
A flowchart from the start to the end of cooling will now be described with reference to FIG.

第7図において、(蜀は実績の冷却開始温度TBG丁、
目標冷却停止温度’I’pcTo 、板厚t、板幅、板
長さ等のデータの取込みブロックを示している。
In Figure 7, (Shu is the actual cooling start temperature TBG,
It shows a block for importing data such as target cooling stop temperature 'I'pcTo, plate thickness t, plate width, plate length, etc.

(B)は目標冷却速度(CRTを設定するブロックを示
しておシ、実験、経験的に鋼種、板厚に応じて設定され
る。
(B) shows a block for setting the target cooling rate (CRT), which is set experimentally or empirically according to the steel type and plate thickness.

(0)は冷却時間τtの計算ブロックでsb、次式1式
% (D)は必要水量密度Wの計算ブロックでちゃ、次式で
められる。
(0) is a calculation block for the cooling time τt, sb, and the following formula 1 formula % (D) is a calculation block for the required water volume density W, which can be calculated by the following formula.

ここで、OR7(’C/ 8 )、w (’/ min
 −m’ )であり、Aおよびnは係数である。
Here, OR7 ('C/ 8 ), w ('/ min
-m'), and A and n are coefficients.

(ト))は必要総水量WTの計算、通板速度■の計算ブ
ロックでアシ、次式でめられる。
(G)) is calculated using the following formula in the calculation block for calculating the total required water amount WT and the threading speed (■).

W7 = W X l”W X // X ηjw:冷
却ゾーン、ll:冷却ゾーン長さ、η:上部等の注水分
布を考慮した補正値 kT :鋼板トップはみ出し量、JCB :鋼板ボトム
はみ出し量、l:鋼板長さ。
W7 = W X l”W : Steel plate length.

(力は注水パターン変更までの時間τ1を計算するブロ
ックでちゃ、次式においてめられる。
(The force is the block that calculates the time τ1 until the water injection pattern is changed, and is calculated by the following formula.

OR丁cht = 0RTo +1 f (Tchl 
)TSCT Tchi ・°・ τi 0□ OR丁Chi (G)は冷却パターン変更開始位置ヘッダNoの決定で
6D、次式によってめられる。
ORTocht = 0RTo +1 f (Tchl
) TSCT Tchi ・°・ τi 0□ ORD Chi (G) is determined by the following equation at 6D in determining the cooling pattern change start position header number.

今、鋼板を冷却するのに使用する冷却水供給ヘッダ総数
をNTとすれば、冷却パターン変更開始位置ヘッダナン
バN1は、 Nl、= (N7 Xτ1/τt〕 N1は冷却装置入側からのナンバである。
Now, if the total number of cooling water supply headers used to cool the steel plate is NT, then the cooling pattern change start position header number N1 is Nl, = (N7 Xτ1/τt) N1 is the number from the cooling device entrance side. be.

@)は注水指令ブロック、(1)は前記ブロック(1)
がyes信号を出したとき、上部・下部ヘッダ(9)α
Oα9CI!11 (22) C231側ヘノ切換手段
(6) (7) (8) [181[191f201を
開にする指令を出すブロックであIC,(J)は注水終
了有無の判断ブロック、(埒は上部、下部ヘッダ側から
トレンチ側への切換手段(6) (7) (8) [1
8] C19)舛の閉指令を出すブロックであり、 (
L)は鋼板を冷却装置外へ搬送指令、実績値取込みブロ
ックを示している。
@) is the water injection command block, (1) is the block (1) above.
When gives a yes signal, the upper and lower headers (9) α
Oα9CI! 11 (22) C231 side helenium switching means (6) (7) (8) [181[191F201 is a block that issues a command to open. Switching means from the lower header side to the trench side (6) (7) (8) [1
8] C19) This is a block that issues a command to close the mace, and (
L) shows a block that commands the conveyance of the steel plate to the outside of the cooling device and takes in actual values.

なお、本実施例にあっては、冷却ゾーン(2)にあって
は冷却開始温度約800℃で冷却停止温度約550℃の
冷却パターン(1)で注水されるものでオシ、冷却ゾー
ン(4)にあっては冷却開始温度約550℃で、冷却停
止温度約800℃の冷却パターン(I])で注水される
ものであって、高温鋼板の冷却にあたって、高温鋼板を
水冷却する過程で、冷却開始温度と冷却停止温度との範
囲を複数の温度域に区分し、各区分の温度域に対応して
鋼板幅方向の冷却水注水パターンを変更しつつ冷却する
ものである。
In this embodiment, water is injected into the cooling zone (2) according to the cooling pattern (1) with a cooling start temperature of about 800°C and a cooling stop temperature of about 550°C; ), water is injected in the cooling pattern (I) with a cooling start temperature of about 550°C and a cooling stop temperature of about 800°C. The range of cooling start temperature and cooling stop temperature is divided into a plurality of temperature ranges, and cooling is performed while changing the cooling water injection pattern in the width direction of the steel sheet corresponding to each temperature range.

以上、要するに本発明にあっては、熱間圧延された高温
鋼板をその上下面から水冷却する方法において、 前記高温鋼板を一方向に通板し、通板方向先端側よ)順
次通板方向後端側に冷却すべく上下面からの水冷却手段
を有する冷却ゾーンに通すに際して、該冷却ゾーンを通
板方向に関して複数の冷却ゾーンに区分し、区分された
冷却ゾーンのうち中間冷却ゾーンに冷却変更ゾーンが備
えられ、該冷却変更ゾーンの前後において制御冷却する
ことを特徴とする高温鋼板の冷却方法に係るものである
から次の利点がある。
In summary, in the present invention, in a method of water cooling a hot rolled high temperature steel plate from its upper and lower surfaces, the high temperature steel plate is threaded in one direction, and sequentially from the tip side in the threading direction. When passing through a cooling zone having water cooling means from the upper and lower surfaces in order to cool the rear end side, the cooling zone is divided into a plurality of cooling zones in the passing direction, and cooling is performed in an intermediate cooling zone among the divided cooling zones. Since the present invention relates to a method for cooling a high-temperature steel sheet, which is characterized in that a changing zone is provided and controlled cooling is performed before and after the cooling changing zone, it has the following advantages.

上部ヘッダを各冷却ゾーンにおいて共通化することがで
きるし、冷却設備長さを短くできるばか多でなく、冷却
バンクの長さを短くすることができる。
The upper header can be shared in each cooling zone, the length of the cooling equipment can be shortened, and the length of the cooling bank can be shortened.

しかも、冷却開始温度と冷却停止温度との範囲を複数の
温度域に区分し、各区分の温度域に対応して鋼板幅方向
の冷却水注入パターンを変更することによって得られる
と同様に、Oeqを低下させ、機械的性質を向上させる
こともできる。
Moreover, the Oeq. It is also possible to reduce the mechanical properties and improve the mechanical properties.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図(a) (1))は従来技術の現状を説明する図
、第2図は冷却停止温度と鋼板の冷却歪の関係を示す図
、第8図は冷却停止温度が材質におよばず影響を説明す
るための図、第4図は従来例の模式図、第5図は鋼板温
度と二次冷却/直接冷却を示す従来例の説明図、第6図
は本発明の冷却工程を示す全体図、第7図は同じくフロ
ーチャート図、第8図は変更冷却ゾーンのノズルを示す
断面図、N9図は同ノズルの注水パターンを示す説明図
、第10図は冷却水系統を示す全体図である。 (2) (3) (4)・・・冷却ゾーン、(2)(J
3 (14)・・・上部ヘッダノズル、■・・・付加ノ
ズル、□□□(251@・・・下部ヘッダノズル。 特許出願人 株式会社神戸製鋼所 手 続補 正書輸発) 16 事件の表示 昭和58年 特許願第 159892号2、発明の名称 高温鋼板の冷却方決 3、補正をする者 事件との関係 特許出願人 4代理人 6、補正の対象 ・−願二−−−路 ・賜幡書全文 7、 補正の内存 +1+ 明細書の特許請求の範囲は別紙の通り補正する
。 +21 F!Am1i第2頁第9行目から第!0行目の
「サイズ・・・・・・形状、」は、「サイズ、形状(グ
レートクラクン等)、」と補正する。 (3) 同第3頁第厘4行目の「1之、」とrCeqJ
の間に、「従来と同一強度レベルの鋼板に対しては」の
文を挿入する。 (4) 同第3貞第14行目の「低下り添加成分」は、
「低下が可能であり、添加成分」と補正する。 (5) 同%7頁第8行目の「前後において制御」は、
「前後において鋼板幅方同冷却水注水竜分布全制御」と
補正する。 (6) 同第12頁第13行目の「冷却ゾーン、」は、
「冷却ゾーン幅、」と補正する〇 (7) 同第12頁第15行目の[複数の通根方回と直
角をな丁方回(幅方向)における冷却水注水分布の異な
る冷却」と補正する。 (8)同第12頁第15行目の[冷却ゾーン・・・・・
・が備えられ、」は、「冷却ゾーンに幅方向の冷却水注
水分布における冷却S、更ゾーンが備えられ、」と補正
する。 (9) 添付図面中、第3図、第5図、第7図?別紙の
通り補正する。 2特許請求の範囲 特需口aGO−50123(7)1
、熱間圧延された高温鋼板?その上下面から水冷却する
方法において、 前記高温銅板全一方回に通板し、通板方向先端側より順
次通板万回v!!喘画に冷却すべく上下面からの水冷却
手段を有する冷却ゾーンrc通丁に際して、該冷却ゾー
ン?通板方向に関して複し、区分された冷却ゾーンのう
ち中間冷却ゾーンに幅方向の冷却水注水分布における冷
却変更ゾーンが備えられ、該冷却変更ゾーンの前後にお
いて制御冷却すること?特徴とする高温鋼板の冷却方法
。 第3 図 第5r71 SlFL4L(°c) 第 7α1
Figure 1 (a) (1)) is a diagram explaining the current state of the prior art, Figure 2 is a diagram showing the relationship between the cooling stop temperature and the cooling strain of a steel plate, and Figure 8 is a diagram showing the relationship between the cooling stop temperature and the cooling strain of the steel plate. Figure 4 is a schematic diagram of a conventional example; Figure 5 is an explanatory diagram of a conventional example showing steel plate temperature and secondary cooling/direct cooling; Figure 6 is a diagram showing the cooling process of the present invention. The overall diagram, Figure 7 is a flowchart, Figure 8 is a sectional view showing the nozzle of the modified cooling zone, Figure N9 is an explanatory diagram showing the water injection pattern of the same nozzle, and Figure 10 is an overall diagram showing the cooling water system. be. (2) (3) (4) ... cooling zone, (2) (J
3 (14)...Upper header nozzle, ■...Additional nozzle, □□□ ([email protected] header nozzle. Patent applicant Kobe Steel, Ltd. Procedural amendment export) 16 of the case Indication 1982 Patent Application No. 159892 2 Name of the invention Method for cooling high temperature steel plate 3 Relationship with the case of the person making the amendment Patent applicant 4 Attorney 6 Subject of amendment - Application 2 - Road - Full text of the gift letter 7, Inclusion of amendments +1+ The scope of claims in the specification will be amended as shown in the attached sheet. +21 F! Am1i page 2, line 9 to ! "Size...Shape," in the 0th line is corrected to "Size, shape (Great Crackle, etc.)." (3) "1." on page 3, line 4 of the same page and rCeqJ
Insert the sentence "For steel plates with the same strength level as conventional" between the two. (4) “Additional ingredients for lowering” in the 14th line of the 3rd message is as follows:
It is corrected to "additional components that can be lowered." (5) “Control before and after” on page 7, line 8 of the same percentage is as follows:
Corrected to ``Full control of cooling water injection distribution in the same direction across the width of the steel plate''. (6) “Cooling zone,” on page 12, line 13, is as follows:
Correct as "cooling zone width," 〇(7) ``Cooling with different cooling water injection distribution in multiple root rotations and perpendicular rotations (width direction)'' on page 12, line 15. to correct. (8) Page 12, line 15 [Cooling zone...
``is provided,'' is corrected to ``the cooling zone is provided with a cooling zone in the cooling water injection distribution in the width direction,''. (9) Among the attached drawings, Figures 3, 5, and 7? Correct as shown in the attached sheet. 2 Claims Special demand port aGO-50123(7)1
, hot rolled high temperature steel plate? In the method of water cooling from the top and bottom surfaces, the high-temperature copper plate is passed all the way once, and the plates are passed sequentially from the tip side in the passing direction 10,000 times. ! In the case of a cooling zone RC machine having water cooling means from the upper and lower surfaces to provide cooling, the cooling zone? Of the cooling zones that are divided and divided in the sheet threading direction, an intermediate cooling zone is provided with a cooling change zone in the cooling water injection distribution in the width direction, and controlled cooling is performed before and after the cooling change zone. Characteristic cooling method for high-temperature steel sheets. Fig. 3 No. 5r71 SlFL4L (°c) No. 7α1

Claims (1)

【特許請求の範囲】 1、熱間圧延された高温鋼板をその上下面から水冷却す
る方法において、 前記高温鋼板を一方向に通板し、通板方向先端側より順
次通板方向後端側に冷却すべく上下面から、の水冷却手
段を有する冷却ゾーンに通すに際して、該冷却ゾーンを
通板方向に関して複数の冷却ゾーンに区分し、区分され
た冷却ゾーンのうち中間冷却ゾーンに冷却変更ゾーンが
備えられ、該冷却変更ゾーンの前後において制御冷却す
ることを特徴とする高温鋸板の冷却方法。
[Claims] 1. In a method of cooling a hot rolled high temperature steel plate with water from its upper and lower surfaces, the high temperature steel plate is threaded in one direction, and sequentially from the leading end side in the threading direction to the rear end side in the threading direction. When passing through a cooling zone having water cooling means from the upper and lower surfaces to cool the sheet, the cooling zone is divided into a plurality of cooling zones in the passing direction, and a cooling change zone is added to an intermediate cooling zone among the divided cooling zones. 1. A method for cooling a high-temperature saw blade, comprising: controlling cooling before and after the cooling change zone.
JP15989283A 1983-08-30 1983-08-30 Cooling method of high-temperature steel sheet Granted JPS6050123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15989283A JPS6050123A (en) 1983-08-30 1983-08-30 Cooling method of high-temperature steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15989283A JPS6050123A (en) 1983-08-30 1983-08-30 Cooling method of high-temperature steel sheet

Publications (2)

Publication Number Publication Date
JPS6050123A true JPS6050123A (en) 1985-03-19
JPH0450368B2 JPH0450368B2 (en) 1992-08-14

Family

ID=15703453

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15989283A Granted JPS6050123A (en) 1983-08-30 1983-08-30 Cooling method of high-temperature steel sheet

Country Status (1)

Country Link
JP (1) JPS6050123A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS626715A (en) * 1985-07-02 1987-01-13 Kawasaki Steel Corp Cooling method for hot run table during rolling of non-cooled stock
JPS62127116A (en) * 1985-11-27 1987-06-09 Mitsubishi Electric Corp Steel plate cooling device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS626715A (en) * 1985-07-02 1987-01-13 Kawasaki Steel Corp Cooling method for hot run table during rolling of non-cooled stock
JPS62127116A (en) * 1985-11-27 1987-06-09 Mitsubishi Electric Corp Steel plate cooling device

Also Published As

Publication number Publication date
JPH0450368B2 (en) 1992-08-14

Similar Documents

Publication Publication Date Title
US20090121396A1 (en) Method of Cooling Steel Plate
JPS62158825A (en) Method for cooling hot rolled steel plate
JP4604564B2 (en) Method and apparatus for controlling cooling of thick steel plate
JPS6272429A (en) Hot straightening method for thick steel plate
CN108705197B (en) Chromium ferrite stainless steel welding and post-welding annealing process in cold continuous rolling production line
CN112974525A (en) Method for improving shape of hot continuous rolling high-strength steel plate with 500MPa grade and above
CN108941199A (en) A kind of reinforcing bar casting system and reinforcing bar casting-rolling method
KR900002504B1 (en) Method of correcting warping of two-layer clad metal plate
JPS6050123A (en) Cooling method of high-temperature steel sheet
CN105734235A (en) Intensive cooling control method for hot continuous rolling strip steel
JP3596460B2 (en) Heat treatment method for thick steel plate and heat treatment equipment
JPS6293010A (en) Production of hot rolled steel plate
JPH02179825A (en) Controller for cooling hot-rolled steel sheet
JPS61219412A (en) Uniform cooling method of hot steel plate and its apparatus
KR101050792B1 (en) Cooling Control Method Using Dynamic Reset
JPS61135423A (en) Hot straightening device of two layered clad metal plate
JPH0115324B2 (en)
JP3156568B2 (en) Cold rolling method
JPH0448851B2 (en)
JPH06254616A (en) Manufacture of thick steel plate excellent in shape and device therefor
JPH0852509A (en) Method for rolling high temperature steel plate
JPH10113713A (en) Production of steel plate of controlled cooling
JPS623816A (en) High draft rolling method
JPH06210339A (en) Cooling device for high temperature steel sheet
CN115446122A (en) Control method for wide-width thin-specification high-strength steel plate shape for ship

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees