JPH07243013A - Production of hot-dip aluminum coated steel sheet - Google Patents
Production of hot-dip aluminum coated steel sheetInfo
- Publication number
- JPH07243013A JPH07243013A JP5518694A JP5518694A JPH07243013A JP H07243013 A JPH07243013 A JP H07243013A JP 5518694 A JP5518694 A JP 5518694A JP 5518694 A JP5518694 A JP 5518694A JP H07243013 A JPH07243013 A JP H07243013A
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- hot
- supporting rolls
- hardness
- roll
- 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
Links
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、溶融アルミメッキ鋼
板、もしくは溶融アルミ合金メッキ鋼板の製造方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a hot dip aluminum plated steel sheet or a hot dip aluminum alloy plated steel sheet.
【０００２】[0002]
【従来の技術】図１において、焼鈍炉７で加熱および還
元された鋼帯１はシンクロール２に巻き付けられて溶融
アルミ浴６に浸漬され、浴上に引き上げられて冷却され
る。そして、鋼帯メッキ層と鋼帯表面の間には合金層が
生成され、その上にアルミもしくはアルミ合金層が形成
される。この際に鋼帯のバタツキや形状抑制のためにサ
ポートロール３が鋼帯に押し付けられるように設置され
ている。サポートロール３は、図２に示すように、モー
タ１１によってジョイント部９，カップリング部８を介
し回転される。サポートロール３の回転速度は鋼帯の送
り速度とほぼ同等である。また、ロールには耐熱性や耐
摩耗性に優れた硬質鋼やステンレス鋼が用いられ，或い
はその表面に溶射等の表面処理が施されている。鋼帯は
その後、浴上に引き上げられ、ワイピングノズル４によ
ってアルミの付着量が制御される。2. Description of the Related Art In FIG. 1, a steel strip 1 heated and reduced in an annealing furnace 7 is wound around a sink roll 2 and immersed in a molten aluminum bath 6, and is pulled up onto the bath and cooled. Then, an alloy layer is formed between the steel strip plating layer and the surface of the steel strip, and an aluminum or aluminum alloy layer is formed thereon. At this time, the support roll 3 is installed so as to be pressed against the steel strip in order to suppress flapping and shape of the steel strip. As shown in FIG. 2, the support roll 3 is rotated by the motor 11 via the joint portion 9 and the coupling portion 8. The rotation speed of the support roll 3 is almost equal to the feeding speed of the steel strip. The roll is made of hard steel or stainless steel having excellent heat resistance and wear resistance, or its surface is subjected to surface treatment such as thermal spraying. The steel strip is then pulled up onto the bath, and the amount of aluminum deposited is controlled by the wiping nozzle 4.
【発明が解決しようとする課題】しかしながら、このよ
うな従来の方法では、鋼帯表面に異物，アルミ酸化物，
金属化合物等（以下ドロス類と称す）が付着した場合、
これを除去する方法がないため、鋼帯のドロス類による
表面欠陥が多発する。また、前記ロールの軸部および軸
受部はロールの回転に伴い著しく摩耗する。軸部と軸受
部が摩耗すると軸受けと軸の隙間が大きくなり、ロール
の回転時にロールが振動するようになる。その結果、鋼
帯のバタツキが発生して、メッキ浴上方でのワイピング
ノズル部においてノズルと鋼帯の間隔が変動するため、
均一なメッキ付着量が得られなくなる。また、摩耗が大
きすぎるとロール折損等の事故が発生するという問題が
あった。However, according to such a conventional method, foreign matter, aluminum oxide,
When metal compounds etc. (hereinafter referred to as dross) adhere,
Since there is no method to remove this, surface defects frequently occur due to dross of the steel strip. Further, the shaft portion and the bearing portion of the roll are significantly worn as the roll rotates. When the shaft portion and the bearing portion wear, the gap between the bearing and the shaft increases, and the roll vibrates when the roll rotates. As a result, flapping of the steel strip occurs, and the spacing between the nozzle and the steel strip fluctuates in the wiping nozzle section above the plating bath.
It becomes impossible to obtain a uniform amount of plating. Further, there is a problem in that if the wear is too great, an accident such as roll breakage occurs.
【０００３】ドロス類による表面欠陥を解決する対策と
して図３に示すような固定式のワイピング装置が考えら
れた。しかし、固定であるため、鋼帯と接触させると著
しく摩耗し、寿命が非常に短く、また設備コストがかか
るという欠点がある。またサポートロールの軸部と軸受
部の両方を硬質化すると摺動部の摩擦抵抗が大きくな
り、ロールを回転するモータの負荷によるトリップやロ
ール停止等の問題が発生し、また、軸部，軸受部のいず
れか一方のみ硬質化すれば他方の摩耗が著しくなる。A fixed wiping device as shown in FIG. 3 has been considered as a measure for solving the surface defect caused by dross. However, since it is fixed, it has the drawbacks that it is significantly worn when it comes into contact with the steel strip, its life is very short, and equipment costs are high. If both the shaft and bearing of the support roll are hardened, the frictional resistance of the sliding part will increase, causing problems such as tripping and roll stop due to the load of the motor that rotates the roll. If only one of the parts is hardened, the other will be significantly worn.
【０００４】本発明は上記課題を解決し、鋼帯表面に付
着するドロス類のワイピング効果を有しサポートロール
の軸部，軸受部の摩耗を抑制する溶融アルミメッキ鋼板
の製造方法を提供することを目的とする。The present invention solves the above problems and provides a method for producing a hot-dip aluminum plated steel sheet which has a wiping effect of dross attached to the surface of a steel strip and suppresses wear of the shaft portion and bearing portion of a support roll. With the goal.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するた
め、本発明の構成は次のとおりとする。即ち、鋼帯をシ
ンクロールを介して溶融アルミ浴中に浸漬し、その後に
サポートロールを介して引き上げ、ワイピングノズルか
ら気体を噴出させて冷却する溶融アルミメッキ鋼板の製
造方法において、前記鋼帯のメッキ合金層の硬度よりも
低い硬度の表面を持つ前記サポートロールを、鋼帯の送
り速度に対して５〜９５％の周速度で回転させることで
ある。In order to solve the above problems, the structure of the present invention is as follows. That is, a steel strip is immersed in a molten aluminum bath through a sink roll, then pulled up through a support roll, and a method for producing a molten aluminized steel sheet in which a gas is jetted from a wiping nozzle to cool the steel strip. That is, the support roll having a surface having a hardness lower than that of the plating alloy layer is rotated at a peripheral speed of 5 to 95% with respect to the feed speed of the steel strip.
【０００６】[0006]
【作用】鋼帯の送り速度に対してサポートロールの周速
度を５〜９５％の範囲で遅くすることにより、鋼帯とサ
ポートロール間で速度差が発生し、鋼帯はロールによっ
て進行速度と逆の方向に抵抗を受ける。これにより、鋼
帯表面に付着したドロス類は鋼帯表面より除去され、ア
ルミ浴中に落下する。また、アルミ浴中に浸漬した際に
生成する合金層の硬度よりも、ロール表面硬度が低いた
め、鋼帯の表面にスリ疵が発生しない。By lowering the peripheral speed of the support roll in the range of 5 to 95% with respect to the feed rate of the steel strip, a speed difference occurs between the steel strip and the support roll. Receive resistance in the opposite direction. As a result, dross attached to the surface of the steel strip is removed from the surface of the steel strip and falls into the aluminum bath. Further, since the surface hardness of the roll is lower than the hardness of the alloy layer formed when it is immersed in the aluminum bath, no scratches are formed on the surface of the steel strip.
【０００７】[0007]
【実施例】以下に本発明の実施態様を図面に示す一実施
例にもとづき説明する。図１において、１は被メッキ材
である鋼帯、２はシンクロール、３は機械構造用炭素鋼
製のサポートロール、４はワイピングノズル、５はサポ
ートロール軸受部、６は溶融アルミ浴、７は還元ガスで
満たされた焼鈍炉である。また図２はサポートロールの
回転機構を示す側面図であり、８はカップリング部、９
はユニバーサル式のジョイント部、１０は減速機、１１
はモーターである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below based on an embodiment shown in the drawings. In FIG. 1, 1 is a steel strip to be plated, 2 is a sink roll, 3 is a support roll made of carbon steel for machine structure, 4 is a wiping nozzle, 5 is a support roll bearing portion, 6 is a molten aluminum bath, 7 Is an annealing furnace filled with reducing gas. FIG. 2 is a side view showing the rotation mechanism of the support roll.
Is a universal joint, 10 is a speed reducer, 11
Is a motor.
【０００８】以上において、作動状態を説明する。鋼帯
の送り速度に対してサポートロール３の周速度を５〜９
５％の範囲で遅くすることにより、鋼帯とサポートロー
ル間で速度差が発生し、鋼帯はロールによって進行速度
と逆の方向に抵抗を受ける。これにより、鋼帯表面に付
着したドロス類は鋼帯表面より除去され、アルミ浴６中
に落下する。また、アルミ浴中に浸漬した際に生成する
Ａｌ−ＦｅもしくはＡｌ−Ｓｉ−Ｆｅ系の合金層の硬度
よりも、ロール表面硬度が低いため、鋼帯の表面にスリ
疵が発生しない。サポートロールの回転速度は可変であ
るため、ドロス類の発生状況に応じて回転速度を変化さ
せ、ワイピング効果を変化させることができる。また、
従来よりもサポートロールの回転速度が低くなるため、
当然に回転数が減少し、ロールの軸および軸受けとカッ
プリング部の摩耗を減少させることができる。また、鋼
帯表面のワイピング装置を設置する必要がないため、コ
ストがかからない。The operation state will be described above. The peripheral speed of the support roll 3 is 5 to 9 with respect to the feed rate of the steel strip.
By slowing down in the range of 5%, a speed difference is generated between the steel strip and the support roll, and the steel strip is resisted by the roll in the direction opposite to the traveling speed. As a result, dross attached to the surface of the steel strip is removed from the surface of the steel strip and falls into the aluminum bath 6. Further, since the roll surface hardness is lower than the hardness of the Al-Fe or Al-Si-Fe alloy layer generated when the steel strip is immersed in the aluminum bath, no scratches are formed on the surface of the steel strip. Since the rotation speed of the support roll is variable, it is possible to change the rotation speed and change the wiping effect according to the generation state of dross. Also,
Since the rotation speed of the support roll is lower than before,
Naturally, the number of rotations is reduced, and the wear of the roll shaft and bearing and the coupling portion can be reduced. Further, since it is not necessary to install a wiping device for the surface of the steel strip, there is no cost.
【０００９】サポートロールの周速度は、鋼帯送り速度
に対し、５〜９５％が適当であり、好ましくは２０〜６
０％（通常運転からの修正運転時）、更に好ましくは３
０〜５０％（通常運転時）である。５％より小さくなる
と帯板に局部摩耗が生じると共に、サポートロールの軸
受部に酸化物などの異物が入りやすくなる。９５％より
大きくなるとドロス類の掻き取り（スクレーパ）効果が
なくなってくる。サポートロールの材料は前記のほかＪ
ＩＳ機械軸受鋼なども用いられる。The peripheral speed of the support roll is appropriately 5 to 95% of the steel strip feeding speed, and preferably 20 to 6
0% (during normal operation from normal operation), more preferably 3
It is 0 to 50% (during normal operation). If it is less than 5%, local wear of the strip occurs, and foreign matters such as oxides easily enter the bearing portion of the support roll. If it exceeds 95%, the effect of scraping (scraper) of dross is lost. In addition to the above materials for the support roll, J
IS mechanical bearing steel is also used.
【００１０】本発明は前記した実施例や実施態様に限定
されず、特許請求の精神および範囲を逸脱せずに種々の
変形を含む。The present invention is not limited to the examples and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims.
【００１１】[0011]
【発明の効果】本発明により、サポートロールの回転速
度を鋼帯の送り速度より遅くすることで、鋼帯表面に発
生するドロス類の付着による表面欠陥が是正され、ま
た、軸部および軸受部での摩耗量を低減させることによ
り、ワイピングノズルでの付着量制御を安定化させるこ
とができる。According to the present invention, by making the rotation speed of the support roll slower than the feeding speed of the steel strip, surface defects due to the adhesion of dross generated on the surface of the steel strip can be corrected, and the shaft portion and the bearing portion can be corrected. By reducing the amount of wear at the wiping nozzle, it is possible to stabilize the control of the amount of adhesion at the wiping nozzle.
【図１】本発明の実施に使用される装置の側面図であ
る。1 is a side view of an apparatus used to practice the present invention.
【図２】サポートロール駆動部の正面図である。FIG. 2 is a front view of a support roll driving unit.
【図３】従来のワイピング装置の機構を示す側面図であ
る。FIG. 3 is a side view showing a mechanism of a conventional wiping device.
１…鋼帯 ２…シンクロール ３…サポートロール ４
…ワイピングノズル ５…サポートロール軸および軸受部 ６…溶融アルミメ
ッキ浴 ７…焼鈍炉 ８…サポートロールカップリング部 ９…ジョイント部 １０…減速機 １１…駆動モータ1 ... Steel strip 2 ... Sink roll 3 ... Support roll 4
... Wiping nozzle 5 ... Support roll shaft and bearing 6 ... Molten aluminum plating bath 7 ... Annealing furnace 8 ... Support roll coupling 9 ... Joint 10 ... Reduction gear 11 ... Drive motor
フロントページの続き (72)発明者 嶋津 鐡哉 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 Tetsuya Shimazu 5 Ishizu Nishimachi, Sakai City, Osaka Prefecture Nisshin Steel Co., Ltd. Sakai Works
Claims (1)
浴中に浸漬し、その後にサポートロールを介して引き上
げ、ワイピングノズルから気体を噴出させて冷却する溶
融アルミメッキ鋼板の製造方法において、前記鋼帯のメ
ッキ合金層の硬度よりも低い硬度の表面を持つ前記サポ
ートロールを、鋼帯の送り速度に対して５〜９５％の周
速度で回転させることを特徴とする溶融アルミメッキ鋼
板の製造方法。1. A method for producing a hot-dip aluminized steel sheet, comprising the steps of immersing a steel strip in a molten aluminum bath through a sink roll, then pulling it up through a support roll, and ejecting a gas from a wiping nozzle to cool. Manufacture of a hot-dip aluminized steel sheet, characterized in that the support roll having a surface having a hardness lower than the hardness of the plating alloy layer of the steel strip is rotated at a peripheral speed of 5 to 95% with respect to the feed rate of the steel strip. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06055186A JP3113143B2 (en) | 1994-02-28 | 1994-02-28 | Manufacturing method of hot-dip aluminized steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06055186A JP3113143B2 (en) | 1994-02-28 | 1994-02-28 | Manufacturing method of hot-dip aluminized steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07243013A true JPH07243013A (en) | 1995-09-19 |
| JP3113143B2 JP3113143B2 (en) | 2000-11-27 |
Family
ID=12991688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06055186A Expired - Fee Related JP3113143B2 (en) | 1994-02-28 | 1994-02-28 | Manufacturing method of hot-dip aluminized steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3113143B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101983429B1 (en) * | 2015-09-10 | 2019-05-28 | 김선재 | Acupressure band to resolve erectile dysfunction and premature ejaculation |
-
1994
- 1994-02-28 JP JP06055186A patent/JP3113143B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3113143B2 (en) | 2000-11-27 |
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