JPS6368213A - Header for descaling by highly pressurized water - Google Patents
Header for descaling by highly pressurized waterInfo
- Publication number
- JPS6368213A JPS6368213A JP21128886A JP21128886A JPS6368213A JP S6368213 A JPS6368213 A JP S6368213A JP 21128886 A JP21128886 A JP 21128886A JP 21128886 A JP21128886 A JP 21128886A JP S6368213 A JPS6368213 A JP S6368213A
- Authority
- JP
- Japan
- Prior art keywords
- descaling
- header
- steel strip
- scale
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000005098 hot rolling Methods 0.000 abstract description 7
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000004299 exfoliation Methods 0.000 abstract 1
- 241000219307 Atriplex rosea Species 0.000 description 12
- 239000007921 spray Substances 0.000 description 9
- 230000007547 defect Effects 0.000 description 5
- 230000001186 cumulative effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 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
- B21B45/04—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)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
この発明は熱間圧延のデスケーリング方法において、従
来はデスケーリングすることが不可能だった赤スケール
やかみこみスケール等の難はくり性スケールを除去する
ことができ１品質上、操業上の優位性を得る水ジェツト
による熱延時のデスケーリングに供される高圧水デスケ
ーリングのヘッダーに関する。[Detailed Description of the Invention] "Industrial Application Field" This invention is a descaling method for hot rolling, in which difficult-to-remove scales such as red scales and bite scales, which were conventionally impossible to descale, are used. The present invention relates to a header for high-pressure water descaling that is used for descaling during hot rolling using a water jet, which can remove 1 and obtain quality and operational advantages.
「従来の技術」
熱延鋼板の製造にあたっては、素材スラブを酸化性雰囲
気の加熱炉に装入し、通常１１００〜１４５０”Ｃで数
時間にわたり加熱し、粗圧延機、仕上圧延機よって熱間
圧延されるが、この際加熱時に生成したスラブ上の１次
スケールや１次スケール除去後に生成した２次スケール
が十分に剥離されない状態のままで圧延すると製品の表
面にスケールがくい込みスケール疵となって残る。この
ようなスケール疵が発生ずると表面性状が著しく損なわ
れるとともにそれが曲げ加工の際などにクラックの起点
として作用するため、製品の品質に重大な弊害を及ぼす
。``Prior art'' In the production of hot-rolled steel sheets, a raw material slab is charged into a heating furnace with an oxidizing atmosphere, heated at 1100 to 1450"C for several hours, and then heated through a rough rolling mill and a finishing mill. The product is rolled, but if the primary scale generated on the slab during heating and the secondary scale generated after removing the primary scale are not sufficiently peeled off during rolling, the scale will dig into the surface of the product and cause scale defects. When such scale flaws occur, the surface quality is significantly impaired and they act as a starting point for cracks during bending, resulting in serious harm to the quality of the product.
通常このようなスケール疵の発生を防止する目的で圧延
ラインに約１００〜１７０ ｋｇ ／ ｃｔの水圧によ
る水ジエツトデスケーリング装置（以下デスケーラ−と
いう）を設置し、これによって鋼板表面」二のスケール
を剥離、除去しながら圧延を行なっている。しかしなが
らスケール剥離性の良否はデスケーラ−の操業条件のほ
かに、スケールの性状。Normally, in order to prevent the occurrence of such scale defects, a water jet descaling device (hereinafter referred to as a "descaler") using a water pressure of approximately 100 to 170 kg/ct is installed in the rolling line. Rolling is performed while peeling and removing. However, the quality of scale removal depends not only on the operating conditions of the descaler but also on the properties of the scale.
すなわち組成および構造等によって強く影響されている
のが実状で、特にＳｉ含有量の多い鋼の一次スケールの
場合、甚しく剥離し難くなることが知られている。ごの
原因は加熱時の高温酸化に際して、鋼中に含有されるＳ
ｉが選択酸化を受は熱可塑性の大きい２ＦｅＯ・５ｉ０
２ （フェアライト）の組成を作り、メタルとの界面が
複雑に入り組んだ特有構造のサブスケールが形成される
ことによるものである。例えばＳｉを０．１％以上含有
する鋼を熱処理する場合には、当該サブスケールの生成
が著しく発達し、このために圧延後の製品表面に無数の
スケール疵が残り、製品の商品価値を著しく劣化させる
ことがある。That is, the actual situation is that it is strongly influenced by the composition, structure, etc., and it is known that in the case of primary scale made of steel with a high Si content, it becomes extremely difficult to peel off. The cause of this is the S contained in the steel during high-temperature oxidation during heating.
i undergoes selective oxidation and is highly thermoplastic 2FeO.5i0
This is due to the formation of a subscale with a unique structure with a complex interface with the metal. For example, when heat-treating steel containing 0.1% or more of Si, the formation of the subscale develops significantly, resulting in countless scale defects remaining on the surface of the product after rolling, which significantly reduces the commercial value of the product. It may cause deterioration.
このような問題を回避する手段としては特公昭６０−１
０８５号に
ｒ Ｓｉ０．１０〜４．００％含有の鋼からなるスラ
ブを熱間圧延して熱延鋼板を製造するに際し、圧延開始
時点から起算した累積圧下率が６５％以上となり、かつ
鋼片温度が１０００℃以上にある圧延期間内において、
８０〜２５０ ｋｇ／ｃｎ！の高圧水ジェットによるデ
スケーリングを累積時間にして０．０４秒以上施すこと
を特徴とする、含ＳｉＧＭの熱間圧延時のデスケーリン
グ方法。」
なる要領のものが提案されており、その要点は以下の２
点にあるものである。As a means to avoid such problems, the
No. 085 r When manufacturing a hot rolled steel plate by hot rolling a slab made of steel containing 0.10 to 4.00% Si, the cumulative reduction rate calculated from the start of rolling is 65% or more, and the steel slab During the pressing period where the temperature is over 1000℃,
80~250 kg/cn! A descaling method during hot rolling of Si-containing GM, characterized in that descaling is performed using a high-pressure water jet for a cumulative time of 0.04 seconds or more. ” has been proposed, and its main points are as follows:
It is at the point.
ｉ）フェアライトとウスタイトの共晶体のデスケーリン
グ性には顕著な温度依存性があり、デスケーリングされ
易い温度範囲とそうでない温度範囲があり〔鉄と鋼溝演
概要集１９８２年８４３９にその詳細が記述されており
、ＦＥＴ（Ｆｉｎｉｓｈｅｒ Ｅｎｔｒｙ Ｔｅｍｐｅ
ｒａｔｕｒｅ ；仕上圧延直前温度）約９３０℃で最も
スケール剥離性が悪い。〕この領域をさけてるためにＦ
ＥＴを１０００℃以上とする。i) The descaling properties of the fairlite and wustite eutectics have a remarkable temperature dependence, and there are temperature ranges in which descaling is easy and temperature ranges in which it is not [Details in Tetsu to Haganezo Performance Summary Collection 1982, 8439] is described, and the FET (Finisher Entry Temperature
rate (temperature immediately before finish rolling) of about 930°C, the scale peeling property is the worst. ]F for avoiding this area
ET is set to 1000°C or higher.
ｉｉ）スラブの加熱中に生成したフェアライトは地鉄に
蚕食状に侵入して複雑な界面構造をしており、このため
特に圧下率の少ない（たとえば粗圧延初期段階）状態で
は高圧水によるデスケーリングでは、これを剥離、除去
することは不可能であるが、圧下が進むにつれ、当該侵
食域が鋼板表面に浮き上がる状態になるために、６５％
以上の累積圧下率でデスケーリング性が向上する。すな
わち、仕上圧延直前に高圧水でデスケーリングすること
が最も有効である。ii) Fairlite generated during the heating of the slab invades the steel base in a worm-like manner and has a complex interfacial structure, which makes it susceptible to damage caused by high-pressure water, especially when the rolling reduction is low (for example, in the initial stage of rough rolling). It is impossible to peel off or remove this by scaling, but as the reduction progresses, the erosion area rises to the surface of the steel plate, resulting in a reduction of 65%.
The descaling property is improved at the cumulative reduction rate above. That is, it is most effective to descale with high pressure water immediately before finish rolling.
しかし、上述のＳｔ含有鋼でのスケール疵防止方法に関
する要点を満足させる操業条件で圧延を行なうには次の
ような問題点がある。However, there are the following problems in carrying out rolling under operating conditions that satisfy the above-mentioned points regarding the method for preventing scale flaws in St-containing steel.
（１）高温のＦＥＴを確保する必要があるため、材質上
許容される下限ＦＥＴよりもかなり高温側のＦＥＴとな
り、このためにスラブの加熱時に高温加熱にする必要が
あり、熱量原単位が増加する。あるいはスケ・−ルロス
が増加し、生産小止りが低下する。(1) Since it is necessary to secure a high temperature FET, the FET will be much hotter than the lower limit FET allowed by the material, and for this reason, it is necessary to heat the slab to a high temperature, increasing the unit heat consumption. do. Alternatively, scale loss increases and production stoppage decreases.
（２）圧下率やデスケーリング時間に種々の制約条件が
加わるため圧延作業が繁雑となる。(2) Since various constraints are added to the rolling reduction rate and descaling time, the rolling operation becomes complicated.
これ等の問題点は、スケールが形態的及び温度的に最も
剥離され易い状態にある圧延工程中の一定時期にデスケ
ーリングを行なわんとするために、成分、温度、圧下率
、デスケーリング時間等の操業条件に種々の制約を受け
るために発生するものであり、デスケーリング作用が強
力であるならば不要な制約である。These problems are due to the fact that descaling is not carried out at a certain period during the rolling process when the scale is most likely to peel off in terms of morphology and temperature, so the ingredients, temperature, rolling reduction rate, descaling time, etc. This occurs due to various constraints on the operating conditions of the 2000, and if the descaling effect is strong, this is an unnecessary constraint.
そこで本発明者らは、特に難スケール剥離性のＳｔ含有
鋼の熱間圧延する際の一次スケールのデスケーリング性
に関して詳細な調査実験を行なった。Therefore, the present inventors conducted detailed research experiments regarding the descaling properties of primary scales during hot rolling of St-containing steel, which is particularly difficult to peel off scales.
実験は、実際のホットスリップミルのＦＳＢ（Ｆｉｎｉ
ｓｈｅｒ ５ｃａｌｅ Ｂｒａｋｅｒ ；仕上圧延直
前の高圧水デスケーリング装置）において、ノズルと鋼
板表面との距ｉｉ！ｔＨを変化させることにより、高圧
水スプレーの単位面積当りの衝突力ｐｔを変化させ、そ
の時の赤スケール発生程度を調査した。その結果、従来
の知見による高圧水供給圧力、デスケーリング時間、デ
スケーリング時の鋼板温度およびデスケーリング時まで
の鋼板の累積圧下率等の種々の制約を受けることなく、
単に高圧水スプレーの鋼板衝突時の単位散布面積当りの
衝突圧ｐｔにより赤スケール剥離性を評価することがで
き、ｐｔを増加させ、特にｐｔが２５ｇ／ｍｍ以上で極
めて剥離性の悪い赤スケールに対してもスケール疵かは
とんとない熱延鋼板が得られることを発見した。The experiment was conducted using FSB (Fini) of an actual hot slip mill.
sher 5cale Braker (high-pressure water descaling device immediately before finish rolling), the distance between the nozzle and the steel plate surface ii! By changing tH, the impact force pt per unit area of the high-pressure water spray was changed, and the degree of red scale generation at that time was investigated. As a result, the system is free from various constraints such as high pressure water supply pressure, descaling time, steel plate temperature during descaling, and cumulative reduction rate of the steel plate until descaling, which are based on conventional knowledge.
The red scale removability can be evaluated simply by the impact pressure pt per unit spray area when a high-pressure water spray collides with a steel plate.Increasing pt, especially red scale with extremely poor removability when pt is 25 g/mm or more. It was discovered that a hot-rolled steel sheet with no scale defects could be obtained.
つまり、高圧スプレーの鋼板衝突時の単位散布面債当り
の衝突圧Ｐｔにより赤スケール剥離性を評価する赤スケ
ール剥離テスト結果を第３図に示す。That is, FIG. 3 shows the results of a red scale peeling test in which the red scale peeling property was evaluated based on the collision pressure Pt per unit spray surface bond when high-pressure spray collided with a steel plate.
この結果、Ｐ ｔ ＜ ２０ｇ／ｍ♂・・・赤スケール
剥離不能２０ｇ／ｍｍ’＜ Ｐ ｔ ＜２５ｇ／−剥離
不安定域Ｐ ｔ ＞２５〜３０ｇ／ｍｍ赤スケール剥離
可能域との定量的知見を得た。As a result, quantitative knowledge that P t < 20 g/m♂... red scale cannot be peeled off, 20 g/mm'< P t < 25 g/- unstable peeling area, P t > 25 to 30 g/mm, red scale peeling possible area I got it.
尚、この実験に用いた材料の成分例は第４図に示される
。Incidentally, an example of the composition of the materials used in this experiment is shown in FIG.
又、単位散布面禎当りの衝突力とは、高圧スプレィ内に
受圧板を配しＰ、Ｈを変え、衝突力と測定したものであ
る。Further, the collision force per unit spray surface is the collision force measured by disposing a pressure receiving plate in the high pressure spray and changing P and H.
さらに、図中０は通常ＨＯＴのＦＳＢで使っているノズ
ルにおけるＰｔ −Ｈの関係を示す。Furthermore, 0 in the figure indicates the Pt-H relationship in the nozzle normally used in HOT FSB.
しかして、赤スケールの様に極めて剥離性の悪いスケー
ルを除去するには
Ｈ＜１３０＋ｎ以下にすればよいことがわかる。Therefore, it can be seen that in order to remove scales such as red scales which have extremely poor removability, it is sufficient to set H<130+n or less.
つまり、高圧水ジェットを鋼板面に近づけすなわちＨを
小さくすることにより高圧水の衝槃力をあげ高衝撃カシ
エツトによりデスケーリング性の向上がはかられる。That is, by bringing the high-pressure water jet closer to the steel plate surface, that is, by reducing H, the impact force of the high-pressure water is increased, and the descaling property is improved by the high-impact cassette.
ここに、従来のデスケーリング装置を第５図に示す。Here, a conventional descaling device is shown in FIG.
図示の如（、ヘッダー３．３゛は１反量２本あり、これ
に対し１００〜１７０ｋｇ／ｃｒＡ程度の水圧の高圧水
が供給されている。As shown in the figure, each header 3.3'' has two headers, to which high pressure water of about 100 to 170 kg/crA is supplied.
図中１はピンチロール。1 in the figure is a pinch roll.
２はテーブルロール。2 is a table roll.
３は上部デスケーリングヘッダ。3 is the upper descaling header.
３゛は下部デスケーリングヘッダ。3 is the lower descaling header.
４は水流ガイド板。4 is the water flow guide plate.
５は樋。5 is the gutter.
６はカバー。6 is cover.
７は１００〜１２０鶴ピンチでヘッダー３，３゛にとり
つけられているノズルを夫々示す。7 shows the nozzles attached to the headers 3 and 3'' with 100 to 120 crane pinches, respectively.
「発明が解決しようとする問題点」
しかしながら、従来高圧水デスケーリングのヘッダーに
あってはＨを小さくすると第６図の図中のＨ７の位置に
示される如く、隣接するスプレィ同士のオーバーラツプ
８がなくなるためスプレィのかからない部分を生ずる（
オーバーラツプが負となる）。``Problems to be Solved by the Invention'' However, in conventional high-pressure water descaling headers, when H is made small, overlap 8 between adjacent sprays occurs as shown at position H7 in the diagram of FIG. This results in areas that are not sprayed (
overlap becomes negative).
逆にオーバーラツプ８をなくなさない様にしてＨを小さ
くするにはノズル７間のキョリＡを小さくする必要があ
る。Ａを小さくするとその分だけ水量が増えるのでエネ
ルギー的には流量増加分だけ大きなデスケーリングエネ
ルギーを必要とする。Conversely, in order to reduce H without eliminating the overlap 8, it is necessary to reduce the aperture A between the nozzles 7. If A is made smaller, the amount of water increases by that amount, so in terms of energy, a large amount of descaling energy is required for the increased flow rate.
「問題点を解決するための手段」、「作用」本発明は叙
上の事情に鑑みなされたもので、その要旨とするところ
は、熱延鋼帯の圧延製造ラインにおける仕上圧延機前に
鋼帯に対向させて、幅方向に配設されたデスケーリング
のヘングーを、走行する鋼帯に対し充分に接近し得るよ
う上下昇降自在であると共に該走行方向に対し所定角度
水平旋回自在に構成するとして、オーバーラツプを負と
することなく鋼板に対して接近し得ることにより、流量
を増加させずに、従来不可能とされていた赤スケールな
どの極めて難剥離性スケールを容易に、しかも単純確実
に剥離させることのできる強力デスケーリング作用の期
し得る高圧デスケーリングのヘッダーを提供するとした
点にある。``Means for Solving the Problems'' and ``Operations'' The present invention has been made in view of the above circumstances, and its gist is that the rolling process for hot rolled steel strips is carried out before the finishing mill in the rolling production line for hot rolled steel strips. A descaling hengoo disposed in the width direction opposite to the strip is configured to be able to move up and down to get sufficiently close to the running steel strip, and to be able to rotate horizontally at a predetermined angle with respect to the running direction. By being able to approach the steel plate without making the overlap negative, it is possible to remove extremely difficult scales such as red scale easily, simply and reliably without increasing the flow rate, which was previously considered impossible. The object of the present invention is to provide a high-pressure descaling header that can be expected to have a strong descaling effect that can be peeled off.
「実施例」 以下、これを図に基づいて詳細に説明する。"Example" This will be explained in detail below based on the drawings.
第１図は本発明ヘッダーを示すデスケーリング装置の縦
断図、第２図は第１図中矢視Ａ−Ａ図である。FIG. 1 is a longitudinal sectional view of a descaling device showing a header of the present invention, and FIG. 2 is a view taken along arrow A-A in FIG.
図に於いて、上部ヘッダ３八、下部ヘッダ３Ｂともスト
ロークＨ′だけ上下可動となっている。In the figure, both the upper header 38 and the lower header 3B are vertically movable by a stroke H'.
上部ヘッダ３Ａはライン中心点Ｏ１を中心に角度θだけ
旋回可能となっている。The upper header 3A can rotate by an angle θ about the line center point O1.
下部ヘッダ３Ｂは５分割されており０１．○工、Ｏ５を
中心にこれもθだけ旋回可能となっている。又、それぞ
れの下部ヘッダ分割体３Ｂ’、３Ｂ” はライン直角方
向Ｘに可動になっていると芯ずれに対応出来好適である
。The lower header 3B is divided into 5 parts: 01. It is also possible to turn by θ centering on ○, O5. Further, it is preferable that each of the lower header division bodies 3B', 3B'' is movable in the direction X perpendicular to the line so as to cope with misalignment.
かかる（ｈ成の意図するところは通常の熱延ラインでは
仕様最大巾（Ｂｍａｘ）の銅帯を製造することはまれで
あり、その０．７倍、即ちＱ、７ Ｂｍａｘ程度の巾の
頻度が多いので、この中以下のものに対し、特にＳｉ含
有鋼や特殊ステンレスなどスケール疵が問題となるもの
についてはＨを下げ、先に示したＰｔ＞２５〜３０とな
る様な領域で使用するとともに、Ｈを下げることによる
オーバーラツプ量の減少又はオーバーラツプ量がなくな
ることによる不都合さは、３Ａ、 ３Ｂのヘッダーをθ
度回転せしめオーバーラツプ量をとろうとするものであ
る。（下部ヘッダー３Ｂを５分割した意味は回転時にヘ
ッダーとテーブルロール２との干渉をさけるためである
。The purpose of this (h) is that it is rare to produce a copper strip with the maximum specification width (Bmax) on a normal hot rolling line, and the frequency of producing a copper strip with a width of about 0.7 times that, that is, Q, 7 Bmax, is rare. Therefore, for materials below this range, especially those where scale defects are a problem such as Si-containing steel and special stainless steel, lower H and use in the range where Pt > 25 to 30 as shown above. , H is reduced or the overlap amount disappears by reducing the headers of 3A and 3B by θ.
The aim is to increase the amount of overlap by rotation. (The reason why the lower header 3B is divided into five parts is to avoid interference between the header and the table roll 2 during rotation.
テーブルロール間のピッチが広い場合にはこの必要はな
い）。This is not necessary if the pitch between table rolls is wide).
この様にして、特に流量を増やすことなく、実用上差支
えない範囲でオーバーラツプ量をへらすことなく、鋼板
とヘッダーとの距離を近づけることにより単位散布面積
あたりの衝突力を上昇せしめることができ、従来のヘッ
ダーでは剥離不可能であった難剥離性スケールを種々操
業条件に拘束されることなく、単純かつ確実に剥離する
ことが出来、もって熱延製品の表面肌向上に大きく貢献
することが可能である。In this way, it is possible to increase the collision force per unit spray area by bringing the distance between the steel plate and the header closer, without increasing the flow rate or reducing the amount of overlap within a practically acceptable range. It is possible to simply and reliably remove the difficult-to-remove scale that cannot be removed with a header without being restricted by various operating conditions, thereby making a significant contribution to improving the surface texture of hot-rolled products. be.
なお、図中、８，９はヘッダー３八に固定のガイドロー
ル、ガイドプレートで、これは板の通板時に■１を下げ
ても板が、ヘッダを破壊することなきよう意図して設け
られている。In addition, in the figure, 8 and 9 are guide rolls and guide plates fixed to the header 38, and these are designed to prevent the board from damaging the header even if 1 is lowered when passing the board. ing.
「発明の効果」
以上の如く、本発明ヘッダによるならば赤スケールなど
の難剥離性スケールを操業上の種々制約条件をいじるこ
となく、単純かつ確実に剥離出来る。"Effects of the Invention" As described above, with the header of the present invention, difficult-to-remove scale such as red scale can be simply and reliably removed without adjusting various operational constraints.
第１図は本発明ヘッダーを示すデスケーリング装置の縦
断図、第２図は第１図中矢視Ａ−Ａ図。
第３図は赤スケール剥離テスト結果を示す図表。
第４図は当該テストに用いた材料の成分を示す図表、第
５図は従来の高圧水デスケーリングのヘッダを示す図、
第６図はノズルのラップ説明図である。
１・・・ピンチロール、 ２・・・テーブルロール。
３・・・デスケーリングヘッダ、 ４・・・水流ガイ
ド板。
５・・・樋、 ６・・・カバー、 ７・・・ノズル
、 ８・・・ガイドロール。
力ろ４勿
フヂシ、勿
ブクグ吻FIG. 1 is a longitudinal sectional view of a descaling device showing a header of the present invention, and FIG. 2 is a view taken along arrow A-A in FIG. Figure 3 is a chart showing the results of the red scale peeling test. Figure 4 is a diagram showing the components of the materials used in the test, Figure 5 is a diagram showing the header of conventional high-pressure water descaling,
FIG. 6 is an explanatory diagram of the nozzle wrap. 1...Pinch roll, 2...Table roll. 3...Descaling header, 4...Water flow guide plate. 5...Gutter, 6...Cover, 7...Nozzle, 8...Guide roll. Rikiro 4 Nafujishi, Nabu Bukugu Chiro
Claims (1)
に対向させて、幅方向に配設されたデスケーリングのヘ
ッダーであって、走行する鋼帯に対し充分に接近し得る
よう上下昇降自在であると共に、該走行方向に対し所定
角度水平旋回自在に構成してなることを特徴とする高圧
水デスケーリングのヘッダー。A descaling header installed in the width direction facing the steel strip in front of the finishing mill in a rolling production line for hot-rolled steel strips. 1. A header for high-pressure water descaling, characterized in that the header is movable and can be rotated horizontally at a predetermined angle with respect to the traveling direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21128886A JPS6368213A (en) | 1986-09-08 | 1986-09-08 | Header for descaling by highly pressurized water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21128886A JPS6368213A (en) | 1986-09-08 | 1986-09-08 | Header for descaling by highly pressurized water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6368213A true JPS6368213A (en) | 1988-03-28 |
Family
ID=16603449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21128886A Pending JPS6368213A (en) | 1986-09-08 | 1986-09-08 | Header for descaling by highly pressurized water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6368213A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360480A2 (en) * | 1988-09-20 | 1990-03-28 | Hitachi, Ltd. | Descaling rolled material |
| JPH0446625A (en) * | 1990-06-12 | 1992-02-17 | Kawasaki Steel Corp | Method and device for descaling material to be rolled |
| EP0484882A1 (en) * | 1990-11-08 | 1992-05-13 | Hitachi, Ltd. | Continuous hot strip rolling system and method thereof |
| US5502881A (en) * | 1993-08-23 | 1996-04-02 | Gaydoul; Juergen | Apparatus for descaling substantially flat surfaces of hot rolled stock |
| EP1077095A2 (en) * | 1999-08-14 | 2001-02-21 | SMS Demag AG | Descaling device for a continuously cast metal strip |
| JP2010214410A (en) * | 2009-03-16 | 2010-09-30 | Jfe Steel Corp | Method of descaling steel |
| JP2010240660A (en) * | 2009-04-01 | 2010-10-28 | Jfe Steel Corp | Descaling device in hot rolling line, descaling method for material to be rolled in hot rolling, and method for manufacturing hot-rolled metal strip |
| JP2012152761A (en) * | 2011-01-24 | 2012-08-16 | Jfe Steel Corp | Equipment and method for descaling thick steel plate |
-
1986
- 1986-09-08 JP JP21128886A patent/JPS6368213A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360480A2 (en) * | 1988-09-20 | 1990-03-28 | Hitachi, Ltd. | Descaling rolled material |
| US5036689A (en) * | 1988-09-20 | 1991-08-06 | Hitachi, Ltd. | Descaling rolled material |
| EP0360480A3 (en) * | 1988-09-20 | 1991-12-27 | Hitachi, Ltd. | Descaling rolled material |
| JPH0446625A (en) * | 1990-06-12 | 1992-02-17 | Kawasaki Steel Corp | Method and device for descaling material to be rolled |
| EP0484882A1 (en) * | 1990-11-08 | 1992-05-13 | Hitachi, Ltd. | Continuous hot strip rolling system and method thereof |
| US5219114A (en) * | 1990-11-08 | 1993-06-15 | Hitachi, Ltd. | Continuous hot strip rolling system and method thereof |
| US5502881A (en) * | 1993-08-23 | 1996-04-02 | Gaydoul; Juergen | Apparatus for descaling substantially flat surfaces of hot rolled stock |
| EP1077095A2 (en) * | 1999-08-14 | 2001-02-21 | SMS Demag AG | Descaling device for a continuously cast metal strip |
| JP2001071022A (en) * | 1999-08-14 | 2001-03-21 | Sms Schloeman Siemag Ag | Descaling device for metal strip of continuous casting |
| EP1077095A3 (en) * | 1999-08-14 | 2003-10-29 | SMS Demag AG | Descaling device for a continuously cast metal strip |
| JP4671479B2 (en) * | 1999-08-14 | 2011-04-20 | エス・エム・エス・ジーマーク・アクチエンゲゼルシャフト | Device for descaling continuously cast metal strip |
| JP2010214410A (en) * | 2009-03-16 | 2010-09-30 | Jfe Steel Corp | Method of descaling steel |
| JP2010240660A (en) * | 2009-04-01 | 2010-10-28 | Jfe Steel Corp | Descaling device in hot rolling line, descaling method for material to be rolled in hot rolling, and method for manufacturing hot-rolled metal strip |
| JP2012152761A (en) * | 2011-01-24 | 2012-08-16 | Jfe Steel Corp | Equipment and method for descaling thick steel plate |
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