JP2809575B2 - Descaling device for hot rolled steel sheet - Google Patents
Descaling device for hot rolled steel sheetInfo
- Publication number
- JP2809575B2 JP2809575B2 JP5074410A JP7441093A JP2809575B2 JP 2809575 B2 JP2809575 B2 JP 2809575B2 JP 5074410 A JP5074410 A JP 5074410A JP 7441093 A JP7441093 A JP 7441093A JP 2809575 B2 JP2809575 B2 JP 2809575B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- hot
- water
- rolling mill
- rolled steel
- 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
-
- 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
- B21B45/04—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 de-scaling, e.g. by brushing
- B21B45/08—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 de-scaling, e.g. by brushing hydraulically
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、熱間圧延機により圧延
される鋼板上のスケールを高圧噴射水で除去する熱間圧
延鋼板の高水圧噴射式デスケーリング装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure jet descaling apparatus for hot-rolled steel sheets which removes scale on a steel sheet rolled by a hot rolling mill with high-pressure jet water.
【０００２】[0002]
【従来の技術】従来の熱間圧延における高水圧噴射式デ
スケーリング装置は、熱間圧延機の鋼板パスライン幅方
向に沿って高圧水噴射ノズルを複数個配列し、ノズルか
らの噴射水を鋼板の幅方向に拡がる扇形とし且つ噴射水
の方向を反圧延機側に所定角度傾斜させ、さらに、板幅
方向に対して水平面において各ノズルを一様に数度傾け
た方法がとられていた。この板幅方向に対して数度傾け
られたことにより、冷却水は鋼板エッジ部に向かって流
れ落ちる。この冷却水が鋼板エッジ部から流れ落ちるこ
とによりその部分に過冷却部が形成される。この過冷却
部に起因して、圧延鋼板のパスライン方向にうねりと曲
がりが発生する。2. Description of the Related Art A conventional high water pressure injection type descaling apparatus in hot rolling comprises a plurality of high pressure water injection nozzles arranged along a width direction of a steel sheet pass line of a hot rolling mill, and water jet from the nozzles is applied to a steel plate. And the direction of the jet water is inclined at a predetermined angle toward the anti-rolling mill side, and each nozzle is uniformly inclined several degrees in the horizontal plane with respect to the sheet width direction. The cooling water flows down toward the edge of the steel sheet by being tilted several degrees with respect to the width direction of the steel sheet. When this cooling water flows down from the steel plate edge portion, a supercooled portion is formed in that portion. Due to this supercooled portion, swelling and bending occur in the direction of the pass line of the rolled steel sheet.
【０００３】従来の方法では、この鋼板の形状不良材
は、冷却後に鋼板形状を修正する工程を追加して、形状
修正されている。しかし、この修正工程は、冷却後に行
われるため鋼板に組成変形が加わり、鋼板の引っ張り強
度、伸び及び絞り等の機械的性質にばらつきをもたら
す。さらに、この工程数の増加によりため鋼板の製造価
格の上昇を招く。したがって、形状修正工程は、圧延鋼
板の品位及び価格の面からも好ましい工程でない。ま
た、タイトスケール鋼板等の製品は、この形状修正工程
を行うことは好ましくない。[0003] In the conventional method, the shape defect of the steel sheet is corrected by adding a step of correcting the shape of the steel sheet after cooling. However, since this correction step is performed after cooling, the steel sheet is subjected to compositional deformation, which causes variations in mechanical properties such as tensile strength, elongation, and drawing of the steel sheet. Further, the increase in the number of steps causes an increase in the production price of the steel sheet. Therefore, the shape correcting step is not a preferable step in terms of the quality and price of the rolled steel sheet. Further, it is not preferable to perform this shape correcting step on products such as tight-scale steel sheets.
【０００４】このため、鋼板表面の均一なデスケーリン
グ及びデスケーリングによって発生する鋼板エッジ部の
過冷却部を防止できるデスケーリング手段が必要であ
る。[0004] Therefore, there is a need for a uniform descaling of the steel sheet surface and descaling means capable of preventing a supercooled portion of the steel sheet edge caused by the descaling.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、熱間圧延鋼
板のデスケーリングにおいて、鋼板エッジ部に発生する
過冷却部の発生を防止できるデスケーリング装置を提供
することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a descaling apparatus capable of preventing a supercooled portion from being generated at an edge portion of a hot-rolled steel sheet in the descaling of a hot-rolled steel sheet.
【０００６】[0006]
【課題を解決するための手段】上記目的は、本発明によ
れば、熱間圧延機の鋼板パスライン幅方向に沿って高圧
水噴射ノズルを複数個配列し、該ノズルからの噴射水を
鋼板のほぼ幅方向に噴射角θ1 で拡がる扇形とし且つ該
噴射水の方向を反圧延機側に迎え角θ2 で傾斜させて向
けた高水圧噴射式デスケーリング装置において、該噴射
水の長軸の鋼板中心部側を反圧延機側へ、鋼板幅方向に
対して捻り角θ3 を１０〜２０°の範囲で傾斜させ、前
記複数のノズルからの噴射水の鋼板表面に形成する衝突
ゾーンが鋼板の中心部を境界に左右対象に反圧延機側に
凸状となることを特徴とする熱間圧延鋼板のデスケーリ
ング装置によって達成される。According to the present invention, a plurality of high-pressure water injection nozzles are arranged along a width direction of a steel sheet pass line of a hot rolling mill, and water injected from the nozzles is supplied to the steel sheet. in high water pressure jet descaling apparatus directed by inclined at angle of attack theta 2 in the direction of sector and to and該噴Hose counter-rolling mill side extending substantially transverse direction at injection angle theta 1, the該噴Imizu long axis of to the steel plate center side counter rolling mill side, the twist angle theta 3 is inclined in the range of 10 to 20 ° with respect to the steel plate width direction, the collision zone is formed on the surface of the steel sheet of the water jets from the plurality of nozzles The present invention is attained by a descaling apparatus for a hot-rolled steel sheet, which is convex to the anti-rolling mill side symmetrically with respect to a center part of the steel sheet.
【０００７】[0007]
【作用】熱間圧延鋼板２は自然冷却した場合、鋼板エッ
ジ部５は側面及び鋼板表裏の三面から冷却されるため鋼
板中央部７よりも冷却効率がよい。このため熱間圧延板
２のデスケーリングは、圧延機側３の噛み込み方向９に
除去したスケールが流れず、且つ鋼板２に温度勾配を生
じさせない方法を講じなければならない。上記の構成を
有する本発明の左右対称配列の衝突ゾーンを有するデス
ケーリング装置は、噴射水が鋼板エッジ部５方向から鋼
板中央部７に向かい且つ反圧延機方向３へと向かって流
れる。本発明においては、この噴射水の流れ方向及び鋼
板の温度勾配は、ノズルの捻り角θ3 、ノズル容量とノ
ズル噴射角θ1 によってほぼ決定される。この噴射水の
流れ方向及び鋼板の温度勾配が制御できることにより、
鋼板エッジ部に島状の過冷却部６が発生しないため、圧
延鋼板２の鋼板パスライン方向８の板厚不均一、及び圧
延鋼板２の長手方向のうねりと曲がり（キャンバー）の
発生を防止することができる。When the hot-rolled steel plate 2 is naturally cooled, the edge 5 of the steel plate is cooled from the side surface and the front and back surfaces of the steel plate, so that the cooling efficiency is higher than that of the central portion 7 of the steel plate. For this reason, descaling of the hot-rolled plate 2 requires a method in which the scale removed in the biting direction 9 on the rolling mill side 3 does not flow and a temperature gradient does not occur in the steel plate 2. In the descaling device having a symmetrical arrangement of collision zones of the present invention having the above-described configuration, the jet water flows from the direction of the steel plate edge portion 5 toward the steel plate central portion 7 and toward the anti-rolling machine direction 3. In the present invention, the flow direction of the jet water and the temperature gradient of the steel sheet are substantially determined by the nozzle twist angle θ 3 , the nozzle capacity, and the nozzle jet angle θ 1 . By controlling the flow direction of this injection water and the temperature gradient of the steel sheet,
Since the island-shaped supercooled portion 6 does not occur at the edge of the steel sheet, uneven thickness of the rolled steel sheet 2 in the steel sheet pass line direction 8 and generation of undulation and bending (camber) in the longitudinal direction of the rolled steel sheet 2 are prevented. be able to.
【０００８】[0008]
【実施例】実施例について図を参照して説明する。本発
明のノズル１は、図１に示すように鋼板２パスライン方
向８に噴射水の長軸がほぼ平行に、噴射角θ1 が１５〜
３０°の範囲で広がる噴射口を有し、また、このノズル
１は、図２に示すように反圧延機方向３に迎え角θ2 が
１５°に成るように配置される。さらにこのノズル１
は、図３に示すように中央部より左側及び右側の各ノズ
ルの長軸の鋼板中心部７側をそれぞれ反圧延機３側へ、
水平面において鋼板パスライン幅方向８に対して捻り角
θ3 を１０〜２０°の範囲で傾斜させる。この結果、各
複数のノズルからの噴射水の鋼板表面に形成する衝突ゾ
ーンは鋼板中心部７を境界に左右対象に反圧延機側３に
凸状に形成される。An embodiment will be described with reference to the drawings. In the nozzle 1 of the present invention, as shown in FIG. 1, the long axis of the spray water is substantially parallel to the steel plate 2 pass line direction 8 and the spray angle θ 1 is 15 to
The nozzle 1 is arranged so that the angle of attack θ 2 is 15 ° in the anti-rolling machine direction 3 as shown in FIG. Furthermore, this nozzle 1
As shown in FIG. 3, the long axis of each nozzle on the left and right sides of the central portion from the central portion toward the steel plate central portion 7 side toward the anti-rolling machine 3 side, respectively.
The twist angle theta 3 is inclined in the range of 10 to 20 ° with respect to the steel sheet pass line width 8 in the horizontal plane. As a result, the collision zone formed on the steel plate surface of the water jet from each of the plurality of nozzles is formed convexly toward the anti-rolling mill side 3 symmetrically with the steel plate center 7 as a boundary.
【０００９】図４に示す従来技術においては、噴射水の
捻り角θ3 は鋼板パスライン幅方向８に対し一様に１５
°傾いている。このため従来技術の熱間圧延において
は、ノズル１の噴射水は鋼板エッジ部５方向に流れ過冷
却部６を発生させる。したがって、本発明のデスケーリ
ング装置は、過冷却部６が発生せず、熱間圧延板２の長
手方向にうねり及びキャンバーを生ずることを防止でき
る。In the prior art shown in FIG. 4, the torsion angle θ 3 of the jet water is 15
° tilted. For this reason, in the hot rolling of the prior art, the jet water of the nozzle 1 flows in the direction of the steel plate edge portion 5 to generate the supercooling portion 6. Therefore, the descaling device of the present invention does not generate the supercooling section 6 and can prevent undulation and camber in the longitudinal direction of the hot-rolled plate 2.
【００１０】表１に本発明と従来技術のデスケールノズ
ルの比較を示した。本発明の実施例（１）〜（６）は、
ノズル容量、ノズル噴射角θ1 、ノズル迎え角θ2 及び
ノズル捻り角θ3 を表１に示す範囲で変化させたがいず
れの場合も従来技術で発生する過冷却部６が生じなかっ
た。[0010] Table 1 shows a comparison between the present invention and the prior art descaling nozzle. Examples (1) to (6) of the present invention
The nozzle capacity, the nozzle injection angle θ 1 , the nozzle attack angle θ 2, and the nozzle twist angle θ 3 were changed in the ranges shown in Table 1, but in any case, the supercooling section 6 generated in the prior art did not occur.
【００１１】[0011]
【表１】 [Table 1]
【００１２】[0012]
【発明の効果】本発明のデスケーリング装置によって、
熱間圧延鋼板のスケール除去を好ましく行うことがで
き、且つ鋼板エッジ部に島状の過冷却部が発生しないた
め、圧延鋼板の板幅方向の板厚不均一、及び圧延鋼板の
長手方向のうねりと曲がり（キャンバー）の発生を防止
することができる。これにより、圧延冷却後に鋼板形状
を修正する工程が除かれるため、鋼板の引っ張り強度、
伸び及び絞り等の機械的性質を均一にし且つ向上するこ
とができる。さらに、鋼板の製造価格を抑えることがで
きる。According to the descaling device of the present invention,
Since descaling of the hot-rolled steel sheet can be preferably performed, and an island-shaped supercooled portion does not occur at the edge of the steel sheet, the thickness of the rolled steel sheet is uneven in the width direction, and the undulation in the longitudinal direction of the rolled steel sheet. And the occurrence of bending (camber) can be prevented. This eliminates the step of correcting the shape of the steel sheet after rolling and cooling, so the tensile strength of the steel sheet,
Mechanical properties such as elongation and drawing can be made uniform and improved. Further, the production cost of the steel sheet can be suppressed.
【００１３】本発明のデスケーリング装置を用いれば、
形状修正の後工程を行う必要がなく、通常の鋼板はもち
ろんこと、特に圧延温度から酸化が進行しない温度域ま
で短時間に強制冷却するタイトスケール鋼板の製造には
最適である。Using the descaling device of the present invention,
It is not necessary to perform a post-process of shape correction, and it is most suitable for producing not only ordinary steel sheets but also tight-scale steel sheets which are forcibly cooled in a short time from a rolling temperature to a temperature range where oxidation does not proceed.
【図１】本発明のノズルピッチとノズル噴射角を示す平
面模式図である。FIG. 1 is a schematic plan view showing a nozzle pitch and a nozzle ejection angle of the present invention.
【図２】本発明の図１の側面をしめす模式図である。FIG. 2 is a schematic view showing a side view of FIG. 1 of the present invention.
【図３】本発明による鋼板衝突後の噴射水の流れを示す
平面図である。FIG. 3 is a plan view showing a flow of jet water after a steel plate collision according to the present invention.
【図４】従来技術による鋼板衝突後の噴射水の流れを示
す平面図である。FIG. 4 is a plan view showing a flow of jet water after a steel plate collision according to the related art.
１…ノズル ２…圧延鋼板 ３…反圧延機側 ４…圧延期側 ５…鋼板エッジ部 ６…過冷却部 ７…鋼板中心部 ８…鋼板パスライン方向 ９…噛み込み方向 θ1 …噴射水ノズルの噴射角 θ2 …噴射水ノズルの迎え角 θ3 …噴射水ノズルの捻り角1 ... nozzle 2 ... rolled steel plate 3 ... counter rolling mill side 4 ... rolling stage side 5 ... steel edge portions 6 supercooling part 7 ... steel center 8 ... steel pass line direction 9 ... direction biting theta 1 ... water jet nozzle Θ 2 … Attack angle of the jet nozzle θ 3 … Twist angle of the jet nozzle
Claims (1)
て高圧水噴射ノズルを複数個配列し、該ノズルからの噴
射水を鋼板のほぼ幅方向に噴射角θ1 で拡がる扇形とし
且つ該噴射水の方向を反圧延機側に迎え角θ2 で傾斜さ
せて向けた高水圧噴射式デスケーリング装置において、
該噴射水の長軸の鋼板中心部側を反圧延機側へ、鋼板幅
方向に対して捻り角θ3 を１０〜２０°の範囲で傾斜さ
せ、前記複数のノズルからの噴射水の鋼板表面に形成す
る衝突ゾーンが鋼板の中心部を境界に左右対象に反圧延
機側に凸状となることを特徴とする熱間圧延鋼板のデス
ケーリング装置。1. A plurality of high-pressure water injection nozzles are arranged along the width direction of a steel sheet pass line of a hot rolling mill, and the water sprayed from the nozzles is formed into a fan shape that spreads in the width direction of the steel sheet at an injection angle θ 1 and in high water pressure jet descaling apparatus with its direction of該噴Imizu is inclined at angle of attack theta 2 in the counter-rolling mill side,
The steel sheet central portion of the long axis of該噴Imizu the counter-rolling mill side, the twist angle theta 3 is inclined in the range of 10 to 20 ° with respect to the steel plate width direction, the steel sheet surface of the injection water from the plurality of nozzles The hot-rolled steel sheet descaling apparatus is characterized in that a collision zone formed in the hot-rolled steel sheet is convex toward the anti-rolling machine side symmetrically with respect to the center of the steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5074410A JP2809575B2 (en) | 1993-03-31 | 1993-03-31 | Descaling device for hot rolled steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5074410A JP2809575B2 (en) | 1993-03-31 | 1993-03-31 | Descaling device for hot rolled steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06285533A JPH06285533A (en) | 1994-10-11 |
| JP2809575B2 true JP2809575B2 (en) | 1998-10-08 |
Family
ID=13546399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5074410A Expired - Lifetime JP2809575B2 (en) | 1993-03-31 | 1993-03-31 | Descaling device for hot rolled steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2809575B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100711399B1 (en) * | 2005-12-23 | 2007-04-30 | 주식회사 포스코 | Cooling method of the lower feed roll |
-
1993
- 1993-03-31 JP JP5074410A patent/JP2809575B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06285533A (en) | 1994-10-11 |
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