JPH09108724A - Mechanical descaling method for hot rolled strip - Google Patents

Mechanical descaling method for hot rolled strip

Info

Publication number
JPH09108724A
JPH09108724A JP29031495A JP29031495A JPH09108724A JP H09108724 A JPH09108724 A JP H09108724A JP 29031495 A JP29031495 A JP 29031495A JP 29031495 A JP29031495 A JP 29031495A JP H09108724 A JPH09108724 A JP H09108724A
Authority
JP
Japan
Prior art keywords
scale
hot
steel strip
rolling
pickling
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
JP29031495A
Other languages
Japanese (ja)
Other versions
JP3406749B2 (en
Inventor
Tetsuhiko Okano
哲彦 岡野
Toshinori Miki
俊典 三喜
Masaki Otsuka
正樹 大塚
Junya Hayakawa
淳也 早川
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.)
Nippon Steel Nisshin Co Ltd
Original Assignee
Nisshin Steel Co 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
Priority to JP29031495A priority Critical patent/JP3406749B2/en
Application filed by Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to DE69625997T priority patent/DE69625997T2/en
Priority to PCT/JP1996/002903 priority patent/WO1997013596A1/en
Priority to CN96191202A priority patent/CN1079303C/en
Priority to KR1019970703903A priority patent/KR100229819B1/en
Priority to US08/849,215 priority patent/US6210501B1/en
Priority to EP96932826A priority patent/EP0796675B1/en
Priority to CN01124090.3A priority patent/CN1184026C/en
Priority to TW085112861A priority patent/TW324674B/en
Publication of JPH09108724A publication Critical patent/JPH09108724A/en
Application granted granted Critical
Publication of JP3406749B2 publication Critical patent/JP3406749B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Metal Rolling (AREA)

Abstract

PROBLEM TO BE SOLVED: To simplify a subsequent acid cleaning process, in descaling a hot rolled strip through high screw-down cold rolling, by maintaining a specific relation between the thickness of hot rolling scale and the draft. SOLUTION: A hot rolled strip 1 with hot rolling scale sticking is unwound from a pay-off reel 2 and, through a bridle roll 3, rolled by high screw-down rolling using a cold rolling mill 4. The hot rolling scale is cracked by the high screw-down rolling, crushed and stripped from the steel strip 1; then, the crushed scale remaining on the surface of the steel strip is removed by a brush 5. In such descaling, if a relation, t×R>=150, is maintained between the thickness t (μm) of the hot rolling scale and the draft R (%), descaling time is shortened in the subsequent acid cleaning. Successively, the hot rolled steel strip 1 is guided to a spray device 6 with the surface of the strip cleaned by spraying high pressure water from a spray nozzle 7, and then brought into an acid cleaning tank so that the scale remaining slightly on the surface is removed through the acid cleaning.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、熱延鋼帯を機械的にデ
ィスケーリングすることにより酸洗負荷を軽減したディ
スケーリング方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a descaling method for reducing the pickling load by mechanically descaling a hot rolled steel strip.

【0002】[0002]

【従来の技術】熱間圧延された鋼帯は、酸化物を主体と
するスケールで表面が覆われている。この熱延鋼帯を、
そのまま冷延等の下工程に送ると、熱延スケールに起因
する表面疵やクラック等の欠陥が発生する原因となる。
そこで、通常、酸洗によって熱延スケールを除去し、熱
延鋼帯を下工程に搬送している。この方法では、酸洗設
備,廃酸処理,脱スケール能の調整等の点で問題があ
り、また酸洗時に発生する水素の侵入によって鋼材の特
性が劣化する虞れもある。酸洗に起因する諸問題を解決
するため、酸洗工程に送り込まれる熱延鋼帯のスケール
を除去する方法が種々検討されている。たとえば、スケ
ールが付着した熱延鋼帯を高圧下率で冷間圧延すること
(以下、黒皮圧延という)が特公昭54−133460
号公報,特開昭57−41821号公報,特開昭57−
10917号公報等で紹介されている。高圧下率の冷間
圧延により、スケールに亀裂が発生し、また鋼帯に対す
る付着力が低下するので、ショットブラスト,高圧水噴
射,ブラッシング,砥粒研削等により冷間圧延後の鋼帯
から容易に分離される。その結果、酸洗槽に搬入される
熱延鋼帯に付着しているスケールが少なくなり、酸洗工
程の負荷が軽減する。
2. Description of the Related Art A hot-rolled steel strip is covered with a scale mainly composed of an oxide. This hot rolled steel strip
If it is sent to a lower step such as cold rolling as it is, it causes defects such as surface flaws and cracks due to the hot rolling scale.
Therefore, the hot-rolled steel strip is usually removed by pickling, and the hot-rolled steel strip is transported to a lower step. This method has problems in pickling equipment, waste acid treatment, adjustment of descaling ability, and the like, and there is also a possibility that the properties of the steel material may be deteriorated due to intrusion of hydrogen generated during pickling. In order to solve various problems caused by the pickling, various methods for removing the scale of the hot-rolled steel strip sent to the pickling step have been studied. For example, cold rolling of a hot-rolled steel strip to which scale is attached at a high pressure ratio (hereinafter referred to as black scale rolling) is disclosed in Japanese Patent Publication No. 54-133460.
JP, JP-A-57-41821, JP-A-57-41821
No. 10917, and the like. Cold rolling at a high pressure reduction causes cracks in the scale and reduces the adhesion to the steel strip, so shot blasting, high-pressure water jetting, brushing, abrasive grain grinding, etc. can easily be performed on the steel strip after cold rolling. Is separated into As a result, the scale attached to the hot-rolled steel strip carried into the pickling tank is reduced, and the load of the pickling step is reduced.

【0003】[0003]

【発明が解決しようとする課題】熱延鋼帯を高圧下率で
黒皮圧延するとき、確かに酸洗工程の負荷が軽減される
ものの、被圧延材である熱延鋼帯の履歴によっては圧延
後の鋼帯表面にスケールが残存しやすいものがある。残
存スケールがあると酸洗負荷の軽減効果が小さくなり、
酸洗槽に送り込まれるスケールも多くなる。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、高
圧下圧延で熱延鋼帯をディスケーリングする際、スケー
ルの厚みに応じて圧下率を調節することにより、熱延ス
ケールを効率よく除去すると共に、スケール付着量が大
幅に軽減された鋼帯を得、酸洗負荷を軽減することを目
的とする。
When black-rolling a hot-rolled steel strip at a high pressure reduction rate, the load of the pickling process is certainly reduced, but it depends on the history of the hot-rolled steel strip as the material to be rolled. Some scales tend to remain on the surface of steel strip after rolling. If there is residual scale, the effect of reducing the pickling load will be reduced,
More scale will be sent to the pickling tank. The present invention
It was devised to eliminate such problems, and when descaling a hot-rolled steel strip under high-pressure rolling, the hot-rolling scale can be efficiently produced by adjusting the reduction ratio according to the scale thickness. The purpose of the steel strip is to remove the scale and obtain a steel strip with a significantly reduced amount of scale deposit, thereby reducing the pickling load.

【0004】[0004]

【課題を解決するための手段】本発明のディスケーリン
グ方法は、その目的を達成するため、表面に熱延スケー
ルが付着している熱延鋼帯を酸洗に先立って高圧下圧延
及びブラッシングによりディスケーリングする際、熱延
スケールの厚みt(μm)と圧下率R(%)との間に、
t×R≧150の関係を維持することを特徴とする。熱
延鋼帯を高圧下圧延するとき、基地鋼の展延に追従でき
ないスケールには、亀裂,層間剥離等が生じ、基地鋼に
対する密着性が低下する。このような鋼帯をブラッシン
グするとき、スケール層に発生している隙間にブラシ毛
が入り込み、鋼帯表面からスケールが除去される。この
ときのスケール剥離性は、本発明者等の調査・研究によ
るとき圧下率によって大きく変動することが判った。し
かも、予想に反し、圧下率を大きくすると却ってスケー
ル剥離が進行せず、多量のスケールが残存したままで鋼
帯が酸洗槽に持ち込まれ、酸洗時間の短縮が図れない場
合があった。
In order to achieve the object, the descaling method of the present invention is carried out by rolling a hot-rolled steel strip having a hot-rolled scale on its surface by high pressure rolling and brushing prior to pickling. During descaling, between the thickness t (μm) of the hot rolled scale and the rolling reduction R (%),
It is characterized by maintaining the relationship of t × R ≧ 150. When the hot-rolled steel strip is rolled under high pressure, cracks, delamination, etc. occur in the scale that cannot follow the expansion of the base steel, and the adhesion to the base steel decreases. When brushing such a steel strip, brush bristles enter the gaps generated in the scale layer, and the scale is removed from the surface of the steel strip. The scale releasability at this time was found to greatly vary depending on the rolling reduction rate when investigated and studied by the present inventors. Moreover, contrary to expectations, when the reduction rate was increased, scale peeling did not proceed, but the steel strip was brought into the pickling tank with a large amount of scale remaining, and the pickling time could not be shortened in some cases.

【0005】本発明者等は、この圧下率が酸洗でのディ
スケーリング性に及ぼす影響を次のように推察した。熱
延スケールは、巻取り温度が高くなるに従って厚いスケ
ール層になっている。このスケールが付着した熱延鋼板
を高圧下率で圧延すると、圧延におけるメタルフロー
は、図1に示すように摩擦によって拘束された非変形部
Iと大きな歪みを受ける主変形部IIに分けられる。これ
らの不均一な変形により内部応力が生じ、クラックが発
生し易くなる。この点は、表層部に大きな変形を起こす
テンションレベラーによる場合のメタルフローと基本的
に異なるところである。すなわち、テンションレベラー
では表層部のみに大きな変形を引き起こすが、高圧下圧
延では内部までの変形が大きくなる。これは、スケール
層の厚さに拘らず基地鋼とスケール部の境界付近の変形
が比較的大きいことから、厚いスケールでも剥離し易い
理由と考えられる。また、スケールが厚いと、クラック
の発生する数も、スケールの薄い場合に比較して多くな
り、スケールの剥離を促進させると考えられる。したが
って、厚いスケールに対しては、低い圧下率でも十分な
スケール剥離効果が得られる。
The present inventors presume the effect of this reduction rate on the descaling property in pickling as follows. The hot rolled scale has a thicker scale layer as the winding temperature increases. When the hot-rolled steel sheet to which the scale adheres is rolled at a high pressure reduction rate, the metal flow in the rolling is divided into a non-deformed portion I restrained by friction and a main deformed portion II subjected to a large strain as shown in FIG. Due to these non-uniform deformations, internal stress is generated and cracks easily occur. This point is basically different from the metal flow in the case of using a tension leveler that causes large deformation in the surface layer portion. That is, the tension leveler causes a large deformation only in the surface layer portion, but in the high pressure rolling, the deformation to the inside becomes large. This is considered to be the reason why the thickness near the boundary between the base steel and the scale portion is relatively large regardless of the thickness of the scale layer, so that even a thick scale is likely to peel off. In addition, when the scale is thick, the number of cracks generated is larger than that when the scale is thin, and it is considered that peeling of the scale is promoted. Therefore, for a thick scale, a sufficient scale peeling effect can be obtained even at a low rolling reduction.

【0006】本発明者等は、このように熱延鋼帯の履歴
によって層構造が変化するスケールを高圧下圧延で機械
的にディスケーリングする際、圧下率をスケール厚みに
応じて調整するとき、如何なる厚みのスケールであって
も効率よく除去されることを多数の実験結果から見い出
した。すなわち、本発明においては、熱延スケールの厚
みt(μm)と圧下率R(%)との間に、t×R≧15
0の関係を維持する。この関係式は、実験結果から演繹
的に導き出されたものであり、関係式が満足されない
と、後続する酸洗工程におけるディスケーリング時間が
長くなり、高圧下圧延の効果が減少する。
When the present inventors mechanically descale a scale whose layer structure changes according to the history of the hot-rolled steel strip by high-pressure rolling, when adjusting the reduction ratio according to the scale thickness, It was found from a large number of experimental results that any scale of thickness can be efficiently removed. That is, in the present invention, t × R ≧ 15 between the thickness t (μm) of the hot-rolled scale and the rolling reduction R (%).
Maintain a zero relationship. This relational expression is derived a priori from the experimental result, and if the relational expression is not satisfied, the descaling time in the subsequent pickling step becomes long and the effect of high pressure rolling is reduced.

【0007】本発明に従ったラインは、図2に示すよう
に構築される。熱延スケールが付着したままの熱延鋼帯
1は、ペイオフリール2から巻き戻され、ブライドルロ
ール3を経て冷間圧延機4で高圧下圧延される。熱延ス
ケールは、高圧下圧延によって亀裂,粉砕され、鋼帯1
から剥離される。鋼帯表面に残留しているスケール粉砕
物をブラシ5で除去した後、更にスプレー装置6に導入
され、スプレーノズル7から高圧水を吹き付けることに
よって鋼帯の表面が清浄化される。このように処理され
た鋼帯は、次いで酸洗槽8に送り込まれ、表面に僅かに
残っているスケールが酸洗除去される。そして、巻取り
リール9で巻き取られる。冷間圧延機4としては、ポリ
ッシャー,スプレーノズル又はスクレーパを周面に対向
させたワークロールを備えたものが好ましい。この場
合、熱延鋼帯からワークロールの周面に転写された熱延
スケールの粉砕物は、圧延ロールの表面に対向配置した
ポリッシャー,スプレーノズル,スクレーパ等によって
ロール表面から除去され、系外に排出される。ポリッシ
ャー,スプレーノズル,スクレーパ等は、回転方向に関
して圧下点よりも下流側の位置でワークロールの周面に
対向配置することが好ましい。また、ワークロールに接
して回転するバックアップロールに対しても、同様なポ
リッシャー,スプレーノズル,スクレーパ等を設けても
よい。
The line according to the invention is constructed as shown in FIG. The hot-rolled steel strip 1 with the hot-rolled scale adhered is unwound from the payoff reel 2, passed through bridle rolls 3, and rolled under high pressure by a cold rolling mill 4. The hot-rolled scale is cracked and crushed by rolling under high pressure, and the steel strip 1
Peeled off from After the scale pulverized material remaining on the surface of the steel strip is removed by the brush 5, it is further introduced into the spray device 6 and the surface of the steel strip is cleaned by spraying high-pressure water from the spray nozzle 7. The steel strip treated in this way is then sent to a pickling tank 8, where scales slightly remaining on the surface are pickled and removed. Then, it is taken up by the take-up reel 9. The cold rolling mill 4 is preferably equipped with a work roll having a polisher, a spray nozzle or a scraper facing the circumferential surface. In this case, the crushed material of the hot-rolled scale transferred from the hot-rolled steel strip to the peripheral surface of the work roll is removed from the roll surface by a polisher, a spray nozzle, a scraper, or the like disposed opposite to the surface of the rolling roll, and is removed from the system. Is discharged. It is preferable that the polisher, the spray nozzle, the scraper, and the like are arranged facing the peripheral surface of the work roll at a position downstream of the rolling point in the rotation direction. Further, a similar polisher, spray nozzle, scraper and the like may be provided for a backup roll which rotates in contact with a work roll.

【0008】ブラシ5としては、シリカ系,アルミナ系
等の砥粒入りナイロンブラシ,ノッチワイヤーブラシ等
が使用される。このようにして、大半のスケールが除去
された鋼帯を酸洗槽に搬入すると、酸洗処理で取り除く
べきスケールは極く僅かなものとなる。そのため、酸洗
負荷が大幅に軽減される。また、ブラッシング後のスプ
レーで使用する高圧水として、80〜95℃に保持され
た温水を使用するとき、高圧下冷延に起因する加工熱で
昇温した鋼帯を降温させることなく酸洗槽に搬入でき
る。そのため、酸洗浴の温度低下が抑制され、一定した
酸洗条件下での処理が可能になると共に、酸洗浴の温度
補償に必要なエネルギーも節減される。
As the brush 5, a silica brush, an alumina brush or the like containing abrasive grains, a notch wire brush or the like is used. In this way, when the steel strip from which most of the scale has been removed is carried into the pickling tank, the scale to be removed by the pickling treatment becomes extremely small. Therefore, the pickling load is greatly reduced. When hot water held at 80 to 95 ° C is used as the high-pressure water used in the spray after brushing, the pickling tank is used without lowering the temperature of the steel strip heated by the working heat caused by cold rolling under high pressure. You can carry it in. Therefore, the temperature drop of the pickling bath is suppressed, the treatment under constant pickling conditions becomes possible, and the energy required for temperature compensation of the pickling bath is also saved.

【0009】[0009]

【実施例】板厚2.5mmの熱延鋼帯を、図2に示すデ
ィスケーリングラインで酸洗に先立って圧下率5〜50
%で冷間圧延した。熱延鋼帯としては、表1に示す成分
・組成を持ち、表面に平均厚み15μm及び7μmの熱
延スケールが付着したままの熱延鋼帯を使用した。
Example A hot-rolled steel strip having a plate thickness of 2.5 mm was drawn at a descaling line shown in FIG.
Cold rolled in%. As the hot rolled steel strip, a hot rolled steel strip having the components and compositions shown in Table 1 and having hot rolled scales having an average thickness of 15 μm and 7 μm attached to the surface was used.

【0010】 [0010]

【0011】圧延後の鋼帯を、シリカ又はアルミナ砥粒
入りのナイロンブラシ(太さ1.6mmの線材を3本撚
り,外径360mm)を1200rpmで回転させて研
磨した。次いで、鋼帯表面に高圧温水を吹き付けて残留
スケールを除去した後、10%濃度の塩酸系酸液(浴温
90℃)を収容した酸洗槽に搬入した。そして、残留ス
ケール及びスケール起因の異物が鋼帯表面に観察されな
くなるまで酸洗処理した。このときの酸洗時間を圧下率
で整理したところ、両者の関係はスケール厚みに応じて
異なっていた。すなわち、15μmと比較的厚いスケー
ルが形成されている熱延鋼帯では、図3に示すように圧
下率20%以上でディスケーリング時間が大幅に短くな
っていた。他方、7μmと比較的薄いスケールが形成さ
れている熱延鋼帯では、図4に示すように圧下率30%
以上でディスケーリング時間が大幅に短くなっていた。
The rolled steel strip was polished by rotating a nylon brush containing silica or alumina abrasive grains (three strands having a thickness of 1.6 mm twisted with an outer diameter of 360 mm) at 1200 rpm. Next, high-pressure hot water was sprayed on the surface of the steel strip to remove residual scale, and then the steel strip was carried into a pickling tank containing a 10% concentration hydrochloric acid-based acid solution (bath temperature 90 ° C.). Then, pickling treatment was performed until residual scale and foreign matter due to scale were not observed on the surface of the steel strip. When the pickling time at this time was arranged by the rolling reduction, the relationship between the two was different depending on the scale thickness. That is, in the hot-rolled steel strip having a relatively thick scale of 15 μm, the descaling time was significantly shortened at a rolling reduction of 20% or more as shown in FIG. On the other hand, in the hot-rolled steel strip having a relatively thin scale of 7 μm, the rolling reduction is 30% as shown in FIG.
As a result, the descaling time was greatly shortened.

【0012】通常の酸洗ラインでは、十分な酸洗時間を
確保するため酸洗槽の長さを80〜90mに設計し、約
16秒の酸洗時間を確保している。黒皮圧延は、酸洗槽
を小規模化することを一つの目的としている。そこで、
従来の酸洗槽の長さの約半分にあたる酸洗時間を可能に
することを前提とし、酸洗時間を5秒の一定値に維持し
て圧下率とスケール厚みとの関係を調査した。図5の調
査結果にみられるように、前掲した条件下ではスケール
厚みが厚く、また圧下率の高いほどスケールの残存量が
少なくなっていた。更に、スケール残存の境界となる条
件は、スケール厚みt(μm)と圧下率R(%)の積と
なる曲線で表されていた。すなわち、スケール厚み
(t)×圧下率(R)≧150を満足する条件であれ
ば、スケールを効率よく除去できることが確認された。
このようにして得られた圧下率とスケール厚みとの関係
に基づき、熱延鋼帯に応じて調整された圧下率で高圧下
圧延するとき、鋼帯表面から効率よくスケールが除去さ
れる。ディスケーリングされた鋼帯は、大幅に緩和され
た酸洗条件でも良好な表面性状をもつ冷延用素材として
使用された。
In an ordinary pickling line, the length of the pickling tank is designed to be 80 to 90 m in order to secure a sufficient pickling time, and a pickling time of about 16 seconds is secured. Black leather rolling has one purpose to reduce the size of the pickling tank. Therefore,
Assuming that a pickling time corresponding to about half the length of a conventional pickling tank is possible, the pickling time was maintained at a constant value of 5 seconds, and the relationship between the rolling reduction and the scale thickness was investigated. As can be seen from the survey results in FIG. 5, the scale thickness was thicker under the conditions described above, and the higher the reduction rate, the smaller the residual amount of scale. Furthermore, the condition that becomes the boundary for remaining scale is represented by a curve that is the product of the scale thickness t (μm) and the rolling reduction R (%). That is, it was confirmed that the scale can be efficiently removed under the condition that the thickness of the scale (t) × the reduction ratio (R) ≧ 150 is satisfied.
Based on the relationship between the rolling reduction and the scale thickness obtained in this way, when rolling under high pressure at a rolling reduction adjusted according to the hot-rolled steel strip, the scale is efficiently removed from the surface of the steel strip. The descaled steel strip was used as a cold-rolling material with good surface properties even under significantly relaxed pickling conditions.

【0013】[0013]

【発明の効果】以上に説明したように、本発明において
は、酸洗に先立って高圧下冷間圧延で熱延鋼帯をディス
ケーリングする際、冷間圧延の圧下率をスケールの厚み
との関係で調整している。これによって、熱延鋼帯の表
面からスケールが効率よく除去され、酸洗槽に搬入され
る鋼帯のスケール付着量が大幅に減少する。そのため、
酸洗負荷が減少し、酸洗時間の短縮,酸洗設備の小規模
化や低濃度酸液の使用等が可能となり、また酸洗に起因
する欠陥が素材に持ち込まれることも抑制される。更に
は、酸洗浴の超寿命化も図られる。
As described above, in the present invention, when hot-rolled steel strip is descaled by high-pressure cold rolling prior to pickling, the reduction ratio of cold rolling is set to the scale thickness. I am adjusting in relation. As a result, the scale is efficiently removed from the surface of the hot-rolled steel strip, and the scale adhesion amount of the steel strip carried into the pickling tank is significantly reduced. for that reason,
The pickling load is reduced, so that the pickling time can be shortened, the pickling equipment can be reduced in scale, a low-concentration acid solution can be used, and the like, and defects caused by pickling can be suppressed from being introduced into the material. Further, the life of the pickling bath can be extended.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 熱延鋼帯を高圧下圧延したときのメタルフロ
ー(a)及び変形領域(b)
FIG. 1 shows a metal flow (a) and a deformation region (b) when a hot-rolled steel strip is rolled under high pressure.

【図2】 本発明に従った熱延鋼帯のディスケーリング
ライン
FIG. 2 Descaling line of hot rolled steel strip according to the present invention

【図3】 厚み15μmのスケールが形成された熱延鋼
帯を冷間圧延したときの圧下率と脱スケール時間との関
係を示したグラフ
FIG. 3 is a graph showing the relationship between the rolling reduction and the descaling time when a hot-rolled steel strip on which a 15 μm-thick scale is formed is cold-rolled.

【図4】 厚み7μmのスケールが形成された熱延鋼帯
を冷間圧延したときの圧下率と脱スケール時間との関係
を示したグラフ
FIG. 4 is a graph showing the relationship between the rolling reduction and the descaling time when a hot-rolled steel strip having a 7 μm-thick scale is cold-rolled.

【図5】 酸洗時間を5秒の一定値にしたときの圧下率
とスケール厚みとの関係を示したグラフ
FIG. 5 is a graph showing the relationship between the rolling reduction and the scale thickness when the pickling time is a constant value of 5 seconds.

【符号の説明】 1:スケールが付着している熱延鋼帯 2:ペイオフ
リール 3:ブライドルロール 4:冷間圧延機
5:ブラシ 6:スプレー装置 7:スプレーノ
ズル 8:酸洗槽 9:巻取りリール
[Explanation of Codes] 1: Hot-rolled steel strip with scale attached 2: Payoff reel 3: Bridle roll 4: Cold rolling mill
5: Brush 6: Spray device 7: Spray nozzle 8: Pickling tank 9: Take-up reel

フロントページの続き (72)発明者 早川 淳也 大阪府堺市石津西町5番地 日新製鋼株式 会社堺製造所内Front Page Continuation (72) Inventor Junya Hayakawa 5 Ishizushi Nishimachi, Sakai City, Osaka Prefecture Nisshin Steel Co., Ltd. Sakai Works

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 表面に熱延スケールが付着している熱延
鋼帯を酸洗に先立って高圧下圧延及びブラッシングによ
りディスケーリングする際、熱延スケールの厚みt(μ
m)と圧下率R(%)との間に、t×R≧150の関係
を維持することを特徴とする熱延鋼帯のディスケーリン
グ方法。
1. When a hot-rolled steel strip having a hot-rolled scale adhered to its surface is descaled by high-pressure rolling and brushing before pickling, the thickness t (μ
A method of descaling a hot-rolled steel strip, characterized in that the relationship of t × R ≧ 150 is maintained between m) and the rolling reduction R (%).
JP29031495A 1995-10-11 1995-10-11 Mechanical descaling method for hot rolled steel strip Expired - Fee Related JP3406749B2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP29031495A JP3406749B2 (en) 1995-10-11 1995-10-11 Mechanical descaling method for hot rolled steel strip
PCT/JP1996/002903 WO1997013596A1 (en) 1995-10-11 1996-10-07 Method of descaling steel sheet in coil through high draft rolling
CN96191202A CN1079303C (en) 1995-10-11 1996-10-07 Method of descaling steel sheet in coil through high draft rolling
KR1019970703903A KR100229819B1 (en) 1995-10-11 1996-10-07 Method of descaling steel sheet in coil through high draft rolling
DE69625997T DE69625997T2 (en) 1995-10-11 1996-10-07 METHOD FOR DESCALING STEEL COILS BY ROLLING WITH HIGH ROLLING PRESSURE
US08/849,215 US6210501B1 (en) 1995-10-11 1996-10-07 Heavy-duty cold-rolling for mechanically descaling a hot-rolled steel strip before pickling
EP96932826A EP0796675B1 (en) 1995-10-11 1996-10-07 Method of descaling steel sheet in coil by high draft rolling
CN01124090.3A CN1184026C (en) 1995-10-11 1996-10-07 Device for removing oxide layer on surface of hot steel rolling belt
TW085112861A TW324674B (en) 1995-10-11 1996-10-21 A method of descaling a heat rolled steel strip and an apparatus thereof and a method of descaling a cold rolled steel strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29031495A JP3406749B2 (en) 1995-10-11 1995-10-11 Mechanical descaling method for hot rolled steel strip

Publications (2)

Publication Number Publication Date
JPH09108724A true JPH09108724A (en) 1997-04-28
JP3406749B2 JP3406749B2 (en) 2003-05-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP29031495A Expired - Fee Related JP3406749B2 (en) 1995-10-11 1995-10-11 Mechanical descaling method for hot rolled steel strip

Country Status (1)

Country Link
JP (1) JP3406749B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102756002A (en) * 2011-04-28 2012-10-31 宝山钢铁股份有限公司 Method for continuous jet descaling
CN106825081A (en) * 2017-03-16 2017-06-13 攀钢集团西昌钢钒有限公司 The detection method of descaling jet operating mode
CN111551054A (en) * 2019-02-12 2020-08-18 宝山钢铁股份有限公司 Temperature control method of BMD (BMD) filtering circulating water based on plate heat exchanger
CN112159985A (en) * 2020-10-27 2021-01-01 安徽广达金属科技有限公司 Pickling device for galvanized steel strip production and use method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102756002A (en) * 2011-04-28 2012-10-31 宝山钢铁股份有限公司 Method for continuous jet descaling
CN102756002B (en) * 2011-04-28 2015-08-26 宝山钢铁股份有限公司 The method of the continuous de-scaling of a kind of jet
CN106825081A (en) * 2017-03-16 2017-06-13 攀钢集团西昌钢钒有限公司 The detection method of descaling jet operating mode
CN111551054A (en) * 2019-02-12 2020-08-18 宝山钢铁股份有限公司 Temperature control method of BMD (BMD) filtering circulating water based on plate heat exchanger
CN111551054B (en) * 2019-02-12 2022-01-14 宝山钢铁股份有限公司 Temperature control method of BMD (BMD) filtering circulating water based on plate heat exchanger
CN112159985A (en) * 2020-10-27 2021-01-01 安徽广达金属科技有限公司 Pickling device for galvanized steel strip production and use method thereof

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