JPS6363521A - Cooling method for strip - Google Patents
Cooling method for stripInfo
- Publication number
- JPS6363521A JPS6363521A JP20690286A JP20690286A JPS6363521A JP S6363521 A JPS6363521 A JP S6363521A JP 20690286 A JP20690286 A JP 20690286A JP 20690286 A JP20690286 A JP 20690286A JP S6363521 A JPS6363521 A JP S6363521A
- Authority
- JP
- Japan
- Prior art keywords
- strip
- width direction
- cooling
- width
- cooling water
- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract 2
- 239000007924 injection Substances 0.000 claims abstract 2
- 238000005098 hot rolling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 17
- 238000012216 screening Methods 0.000 abstract 2
- 238000005297 material degradation process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 238000005096 rolling process Methods 0.000 description 5
- 230000032258 transport Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、熱間圧延設備におけるストリップ幅方向冷却
制御方法に係り、特にストリップの幅方向の形状や、材
質を最適にする冷却方法に関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for controlling cooling in the width direction of a strip in hot rolling equipment, and particularly to a cooling method for optimizing the width direction shape and material of the strip. It is.
〈従来の技術〉
一般に熱間圧延設備においては、仕上圧延において圧延
されたストリップを冷却ヘッダから噴出する冷却水によ
って冷却する冷却装置がある。第７図は一般の熱間圧延
ラインを示す図であり、加熱炉６において圧延温度まで
加熱されたスラブは粗圧延機群７によって圧延された後
、クロップシャ８によってその先後端部を切断され、さ
らに仕上圧延機群９において圧延されてストリップとな
り冷却ヘッダ１０において冷却された状態でコイラ１１
に巻き取られるようになっている。<Prior Art> Generally, in hot rolling equipment, there is a cooling device that cools the strip rolled in finish rolling with cooling water jetted from a cooling header. FIG. 7 is a diagram showing a general hot rolling line, in which a slab heated to rolling temperature in a heating furnace 6 is rolled by a rough rolling mill group 7, and then its front and rear ends are cut by a crop shear 8. , is further rolled into a strip in the finishing mill group 9, cooled in the cooling header 10, and then passed through the coiler 11.
It is designed to be wound up.
ここで冷却ヘッダ１０は、ストリップ４を冷却ゾーンに
おいて搬送するホットランテーブル１２の上部及び下部
の長手方向に配設され、圧延されるストリップの最大幅
の冷却を可能とするノズルをストリップ幅方向に配列し
、上下部ヘッダのノズルから冷却水を噴射可能としてい
る。しかしながら。Here, the cooling header 10 is disposed in the longitudinal direction of the upper and lower parts of the hot run table 12 that transports the strip 4 in the cooling zone, and has nozzles arranged in the width direction of the strip to enable cooling of the maximum width of the strip to be rolled. Cooling water can be injected from the nozzles on the upper and lower headers. however.
ホットランテーブル１２を走行するストリップ４の幅方
向両端部の温度は、中央部の温度に比べて温度降下が早
く、製品品質に影響を与えるため９幅方向の冷却温度の
制御を行うべく２例えば実開昭５９〜４９４０９号公報
に提案されているようにストリップに対する冷却水の噴
射範囲を、ストリップ幅方向に移動可能な可動板を設は
調整する装置がある。The temperature at both ends in the width direction of the strip 4 running on the hot run table 12 drops faster than the temperature at the center, which affects product quality. As proposed in Japanese Unexamined Patent Publication No. 59-49409, there is a device in which a movable plate movable in the width direction of the strip is used to adjust the spray range of cooling water onto the strip.
〈発明が解決しようとする問題点〉
従来技術において、可動板のストリップ幅方向における
位置は製品品質に大きく影響を与えるものであるが、製
品の品質と可動板の位置の関係については、いまだに明
らかになっていないため以下のような問題がある。<Problems to be Solved by the Invention> In the prior art, the position of the movable plate in the strip width direction greatly affects product quality, but the relationship between product quality and the position of the movable plate is still unclear. Because this is not the case, the following problems occur.
つまり、可動板の位置が、ストリップの端部に近過ぎる
と端部の温度降下が中央部に比べ大きくなり、ストリッ
プの残留応力が軽減できず、製品で耳波を生じ、平坦度
不良となる。In other words, if the position of the movable plate is too close to the edge of the strip, the temperature drop at the edge will be greater than that at the center, making it impossible to reduce the residual stress in the strip, causing undulations and poor flatness in the product. .
反対に可動板の位置が、ストリップの中心方向に入りす
ぎると、ストリップ端部の温度が中央部に比べ高くなり
、冷却後、逆に原波の平坦度不良および材質不良が生じ
る結果となる。On the other hand, if the position of the movable plate is too far toward the center of the strip, the temperature at the ends of the strip will be higher than that at the center, resulting in poor flatness of the original wave and poor material quality after cooling.
このように、従来のストリップの冷却法では。Thus, in the traditional strip cooling method.
可動水切り板のストリップ幅方向の位置によって。Depending on the position of the movable draining plate in the strip width direction.
製品品質に大きな影響を与えていたので本発明は前記問
題を解決するための、ストリップ幅方向における最適な
冷却方法を捷供するためになされたものである。Since this had a great effect on product quality, the present invention was made to provide an optimal cooling method in the width direction of the strip in order to solve the above problem.
く問題点を解決するための手段〉
本発明者らは、ストリップの冷却方法について鋭意研究
を重ねた結果、可動水切り板の最適調整位置があるとの
知見をえ、この知見にもとづいてこの発明をなすに至っ
た。Means for Solving the Problems As a result of extensive research into strip cooling methods, the present inventors have found that there is an optimal adjustment position for the movable draining plate, and based on this knowledge, the present invention has been developed. I came to do this.
この発明は、スト、リップ幅方向に移動し、流下する冷
却水を遮蔽できる可動水切り板を備えた。This invention includes a movable drain plate that can move in the width direction of the strip and the lip and can block the cooling water flowing down.
ストリップ全幅方向に配列された冷却水噴射ノズルから
ストリップに冷却水を噴射するストリップ冷却方法にお
いて、可動水切り板の調整位置を。Adjustment position of the movable drain plate in a strip cooling method in which cooling water is sprayed onto the strip from cooling water spray nozzles arranged across the entire width of the strip.
輸率（ストリップ全幅に対して幅方向両側をシールする
度合）で１０〜３０％の範囲とした熱間圧延設備におけ
るストリップの冷却方法である。This is a method for cooling a strip in a hot rolling facility in which the transfer index (degree of sealing on both sides in the width direction with respect to the entire width of the strip) is in the range of 10 to 30%.
〈作 用〉
本発明者らは実験の積み重ねにより、各種材料について
１幅率を段階的に変えて輸率と△ＣＴ（注１）、急峻度
（注２）および材質（注３）との関係などを確認し、平
坦度および幅方向材質均一化のうえで、最適幅率が存在
することを見い出した。<Function> Through repeated experiments, the present inventors have determined the relationship between the transport number, △CT (Note 1), steepness (Note 2), and material quality (Note 3) by changing the width ratio stepwise for various materials. We confirmed the relationship and found that there is an optimal width ratio based on flatness and uniformity of material in the width direction.
（注１）ＣＴとは巻取り時のストリップ温度であり、△
ＣＴとは、〒□−〒、Ｎまたは。(Note 1) CT is the strip temperature during winding, △
CT is 〒□-〒, N or.
千〇Ｆ ＴＣＭを意味する。（第８図参照）（注２）
急峻度とは、Ｈ／ＬＸ１００（％）で、平坦の度合を表
わす。（第９図参照）
（注３）材質とは材料の機械的性質で、Ｔ、Ｓ（引張強
さ）で示す。1,000 F TCM. (See Figure 8) (Note 2)
The steepness is H/LX100 (%) and represents the degree of flatness. (See Figure 9) (Note 3) Material refers to the mechanical properties of the material, and is indicated by T and S (tensile strength).
第１図を用いて作用を説明する。The operation will be explained using FIG.
第１図の駆動シャフト１を回転させ、駆動シャフトと連
結した水切り板２を幅方向の任意の位置に移動させて、
ノズル３から落下する冷却水をうけて、ストリップ４の
エツジ部に直接冷却水が掛らないようにする。第２図は
、第１図の幅方向冷却制御装置５のストリップ長さ方向
における配置図を示すものである。By rotating the drive shaft 1 shown in FIG. 1 and moving the draining plate 2 connected to the drive shaft to an arbitrary position in the width direction,
The cooling water falling from the nozzle 3 is received so that the cooling water does not directly splash on the edge part of the strip 4. FIG. 2 shows a layout diagram of the width direction cooling control device 5 of FIG. 1 in the strip length direction.
〈実施例〉
輸率とは、第３図に示すように、ストリップ全幅に対し
て巾方向両側をシールする度合いを示し。<Example> As shown in FIG. 3, the transport number indicates the degree to which both sides in the width direction are sealed with respect to the entire width of the strip.
Ａ −Ｘ １００−輸率（％）の式で求められる。A It is determined by the formula -X 100-transportation number (%).
第４図は１幅率と△ＣＴの関係を示した１つの例で輸率
が増加すると△ＣＴが大きくなるが１輸率１０〜３０％
の場合は△ＣＴは２５〜５５℃である。第５図は２幅率
と冷却後急峻度との関係を示したもので１輸率２０％〜
２４％で冷却後急峻度が最小となり３輸率１０％〜３０
％の範囲を外れると冷却後の目標急峻度である１、０％
以下の範囲を外れる結果となる。Figure 4 is an example showing the relationship between the 1-width ratio and △CT. As the transport number increases, △CT increases, but the 1-transportation ratio is 10 to 30%.
In this case, ΔCT is 25 to 55°C. Figure 5 shows the relationship between the two-width ratio and the steepness after cooling.
At 24%, the steepness becomes minimum after cooling, and the 3-transportation number is 10% to 30.
% range, the target steepness after cooling is 1.0%.
The result will be outside the following range.
第６図は、△ＣＴとＴ、Ｓ変動（Ｔ、Ｓ Ｅ４−Ｔ、Ｓ
。ｎｔａｒ）の関係を示したもので１幅方向冷却制御に
より△Ｔ、Ｓが変化する。△ＣＴの範囲が２５〜５５℃
の場合、製品幅方向における機械的性質（材質）は目標
範囲内に入るが、この△ＣＴ範囲を外れた場合９幅方向
の材質の均一化は保証できなくなる。Figure 6 shows △CT and T, S fluctuation (T, S E4-T, S
. ntar), and ΔT and S change by cooling control in one width direction. △CT range is 25-55℃
In this case, the mechanical properties (material) in the width direction of the product fall within the target range, but if it falls outside of this ΔCT range, uniformity of the material in the width direction cannot be guaranteed.
とくにΔＣＴが必要以上に大きくなりすぎると。Especially if ΔCT becomes too large than necessary.
端部のＴ、Ｓが中央部よりも低下し材質不良を生じる結
果となる。T and S at the ends are lower than those at the center, resulting in poor material quality.
したがって、冷却後急峻度を１．０％以内の良好な平面
形状の確保と材質不良の発生を防止して。Therefore, after cooling, a good planar shape with a steepness of 1.0% or less can be ensured, and material defects can be prevented.
幅方向材質の均一化を図るためには１幅方向冷却制御に
おいて９幅率を１０％〜３０％とする方法が最適である
。In order to make the material uniform in the width direction, it is optimal to set the width ratio to 10% to 30% in the cooling control in the width direction.
本発明を成分：Ｃ１０，１４％、 Ｍｎ１０．４９％５
寸法： ３．２ｍ＋ａ厚さＸ ９１４ｍ幅の鋼材で実
施した例を示す。Ingredients of the present invention: C10.14%, Mn10.49%5
Dimensions: 3.2m+a thickness x 914m width An example is shown below.
該鋼材は、仕上出側温度（ＦＤＴ）： ８４０℃から
巻取り温度（ＣＴ）： ４７５℃に冷却し、かつ。The steel material was cooled from a finish exit temperature (FDT) of 840°C to a coiling temperature (CT) of 475°C.
幅方向冷却制御を実施し２幅率を２１．８％（巾方向シ
ール巾１００１００ｔ／ストリップ、全幅９１４Ｍ）と
したものである、 その結果、冷却後急峻度が０．８７
％と良好な形状を得た。The widthwise cooling control was carried out to set the two-width ratio to 21.8% (widthwise seal width 100100t/strip, total width 914M). As a result, the steepness after cooling was 0.87.
% and a good shape was obtained.
また、 ３．２ｎ厚さＸ １．７２９ｆｉ巾、
５．０ｆｌ厚さ×１ 、２２９ ｔｍ巾においても同様
に良好な結果を得ることが出来た。Also, 3.2n thickness x 1.729fi width,
Similar good results were also obtained with a thickness of 5.0 fl x 1 and a width of 229 tm.
〈発明の効果〉
幅方向冷却制御において２幅率を１０％〜３０％の範囲
とすることによって９幅方向材質が均一化し。<Effects of the Invention> By setting the two width ratio in the range of 10% to 30% in the widthwise cooling control, the material quality in the widthwise direction is made uniform.
さらに材質不良の発生も防止できる。Furthermore, occurrence of material defects can be prevented.
そして、冷却後良好な形状が得られるので、形状矯正の
ためスキンバス（ＳＫ）廻しとしていた追加工程が省け
る。Since a good shape can be obtained after cooling, the additional process of turning the skin bath (SK) for shape correction can be omitted.
第１図は１幅方向冷却制御装置の使用状態の説明図、第
２図は２幅方向冷却制御装置の配置図。
第３図は１幅率の説明図、第４図は１幅率と△ＣＴとの
関係図、第５図は３幅率と急峻度との関係図、第６図は
、△ＣＴと△Ｔ、Ｓとの関係図、第７図は、熱間圧延ラ
インの説明図、第８図は。
△ＣＴの説明図、第９図は、急峻度の説明図である。
１・・・駆動シャフト
２・・・可動水切り板
３・・・ノズル
４・・・ストリップ
５・・・幅方向冷却制御装置
６・・・加熱炉
７・・・圧延機群
８・・・クロツブシ中
９・・・仕上圧延機群
１０・・・冷却ヘッダ
１１・・・コイラー
１２・・・ホットランテーブル
第 １ 図
第 ３ 図
第５図
幅 率 （％ ）FIG. 1 is an explanatory diagram of the usage state of one width direction cooling control device, and FIG. 2 is a layout diagram of two width direction cooling control devices. Fig. 3 is an explanatory diagram of the 1-width ratio, Fig. 4 is a diagram of the relationship between the 1-width ratio and △CT, Figure 5 is a diagram of the relationship between the 3-width ratio and steepness, and Figure 6 is a diagram of the relationship between △CT and △ Figure 7 is a diagram showing the relationship between T and S, and Figure 8 is an explanatory diagram of the hot rolling line. FIG. 9, an explanatory diagram of ΔCT, is an explanatory diagram of steepness. 1... Drive shaft 2... Movable draining plate 3... Nozzle 4... Strip 5... Width direction cooling control device 6... Heating furnace 7... Rolling mill group 8... Kurotsubushi Middle 9... Finishing rolling mill group 10... Cooling header 11... Coiler 12... Hot run table Figure 1 Figure 3 Figure 5 Width ratio (%)
Claims (1)
る可動水切り板を備えた、ストリップ全幅方向に配列さ
れた冷却水噴射ノズルからストリップに冷却水を噴射す
るストリップ冷却方法において、可動水切り板の調整位
置を、幅率（ストリップ全幅に対して幅方向両側をシー
ルする度合）で１０〜３０％の範囲としたことを特徴と
する熱間圧延設備におけるストリップの冷却方法。Adjustment of the movable drain plate in a strip cooling method in which cooling water is injected onto the strip from cooling water injection nozzles arranged across the width of the strip, which is equipped with a movable drain plate that can move in the width direction of the strip and block the flowing cooling water. A method for cooling a strip in hot rolling equipment, characterized in that the position is set in a range of 10 to 30% in width ratio (degree of sealing both sides in the width direction with respect to the entire width of the strip).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20690286A JPS6363521A (en) | 1986-09-04 | 1986-09-04 | Cooling method for strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20690286A JPS6363521A (en) | 1986-09-04 | 1986-09-04 | Cooling method for strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6363521A true JPS6363521A (en) | 1988-03-19 |
Family
ID=16530957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20690286A Pending JPS6363521A (en) | 1986-09-04 | 1986-09-04 | Cooling method for strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6363521A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000070206A1 (en) * | 1999-05-14 | 2000-11-23 | Helmut Swars | Honeycomb element |
| JP2002212645A (en) * | 2001-01-22 | 2002-07-31 | Nisshin Steel Co Ltd | Method for producing hot rolled steel strip excellent in uniformity of material in width direction |
| CN102189130A (en) * | 2010-03-19 | 2011-09-21 | 宝山钢铁股份有限公司 | A self-balancing plunger-type upper spraying laminar flow cooling device |
-
1986
- 1986-09-04 JP JP20690286A patent/JPS6363521A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000070206A1 (en) * | 1999-05-14 | 2000-11-23 | Helmut Swars | Honeycomb element |
| JP2002212645A (en) * | 2001-01-22 | 2002-07-31 | Nisshin Steel Co Ltd | Method for producing hot rolled steel strip excellent in uniformity of material in width direction |
| JP4643833B2 (en) * | 2001-01-22 | 2011-03-02 | 日新製鋼株式会社 | Manufacturing method of hot-rolled steel strip with excellent material uniformity in the width direction |
| CN102189130A (en) * | 2010-03-19 | 2011-09-21 | 宝山钢铁股份有限公司 | A self-balancing plunger-type upper spraying laminar flow cooling device |
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