JPH0688189A - Galvanizing method having high quality and high deposition - Google Patents
Galvanizing method having high quality and high depositionInfo
- Publication number
- JPH0688189A JPH0688189A JP26055692A JP26055692A JPH0688189A JP H0688189 A JPH0688189 A JP H0688189A JP 26055692 A JP26055692 A JP 26055692A JP 26055692 A JP26055692 A JP 26055692A JP H0688189 A JPH0688189 A JP H0688189A
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- Prior art keywords
- steel wire
- plating
- water
- galvanizing
- bath
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は線状材の高品質高付着量
溶融亜鉛めっき方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-quality, high-adhesion-quantity hot-dip galvanizing method for linear materials.
【０００２】[0002]
【従来の技術】線状材、たとえばＡＣＳＲ用鋼線、電話
線用吊り線、ケーブルなどの支持線、鉄道トロリー線の
メッセンジャーケーブル、ロープ用素線などにおいては
良好な耐食性が要求されるため、溶融亜鉛めっきが施さ
れることが多く、特に高い耐食性を要求される場合に
は、めっき付着量が２００g/m2以上の高付着量溶融亜鉛
めっきが施されている。このような高付着量溶融亜鉛め
っきにあたって、従来では一般に、めっき槽に配した自
由回転型のシンカーロールを介して、図４のように、線
状材を垂直に引き上げることによってめっき層の偏心を
防ぐようにし、めっき浴９０から引き出す部分に木炭や
不活性ガスなどからなる絞り部１１を配し、めっき槽表
面を被酸化性または還元雰囲気にすることでめっき表面
に酸化物等の付着するのを防止している。そして、めっ
き槽から線状材を引き上げた直後、すなわち絞り部１１
の直上で水冷ノズル１２０により水冷を行って溶融状態
のめっき層を凝固させている。2. Description of the Related Art Wire materials such as steel wires for ACSR, suspension wires for telephone wires, supporting wires for cables, messenger cables for railway trolley wires, and strand wires for ropes are required to have good corrosion resistance. In many cases, hot dip galvanizing is performed, and when particularly high corrosion resistance is required, high galvanizing amount of 200 g / m 2 or more is applied. In such a high deposition amount hot dip galvanizing, conventionally, the eccentricity of the plating layer is generally increased by pulling the linear material vertically through a free-rotating sinker roll arranged in a plating tank as shown in FIG. In order to prevent this, a throttling portion 11 made of charcoal, an inert gas or the like is arranged in the portion drawn out from the plating bath 90, and the surface of the plating tank is made oxidizable or reducing atmosphere so that oxides or the like adhere to the surface of the plating. Is being prevented. Immediately after pulling up the linear material from the plating tank, that is, the narrowed portion 11
Immediately above it, water cooling is performed by a water cooling nozzle 120 to solidify the molten plating layer.
【０００３】[0003]
【発明が解決しようとする課題】この際に水冷部分から
水滴がめっき槽に落下すると、めっき浴９０の表面に酸
化物が生成し、品質上問題となる。そこで、水冷ノズル
１２０の下側に水受け１３０，１４０を設けるととも
に、上下の水受け部１３０，１４０の間に送風手段１５
を設け、これによってエアを吹付け、水滴を絞り部１１
に落下させないようにしている。しかしこの方法では、
線状材の引き上げ方向が垂直であり、水冷ノズル１２０
から吹き付けられた水滴がめっき表面に添って垂直状に
落下するため、水受け１３０，１４０をめっき面に接近
させる必要がある。しかし、線状材は送風手段１５から
吹き付けられるエアによる外力で振動されるため、水受
け１３０，１４０が線状材と接触、干渉を起こすため、
十分に接近させることが困難である。このため、水冷部
分からの水滴の落下を完全に防止することは不可能で、
めっき表面への酸化物の付着による品質低下を避けられ
なかった。この対策として送風エア圧を高くするとめっ
き層の外力として作用するため、ことに高付着量のめっ
きではめっき層の偏心が発生しやすい。すなわち、めっ
き層の偏心とは周方向のめっき偏り比（最大厚み／最小
厚み）であり、このめっき偏り比が３以上になりやすい
という問題があった。At this time, if water drops drop from the water-cooled portion into the plating tank, oxides are generated on the surface of the plating bath 90, which is a quality problem. Therefore, the water receivers 130 and 140 are provided below the water cooling nozzle 120, and the blower unit 15 is provided between the upper and lower water receivers 130 and 140.
Is provided, by which air is blown and water droplets are squeezed 11
I try not to drop it. But this way,
The pulling direction of the linear material is vertical, and the water cooling nozzle 120
Since water droplets sprayed from the water drop vertically along the plating surface, it is necessary to bring the water receivers 130 and 140 close to the plating surface. However, since the linear material is vibrated by the external force of the air blown from the blowing means 15, the water receivers 130 and 140 come into contact with and interfere with the linear material.
It is difficult to get close enough. Therefore, it is impossible to completely prevent the drop of water droplets from the water-cooled part,
The quality deterioration due to the adhesion of oxides on the plating surface was unavoidable. As a countermeasure against this, if the blown air pressure is increased, it acts as an external force of the plating layer, so that eccentricity of the plating layer is likely to occur especially in the case of plating with a high adhesion amount. That is, the eccentricity of the plating layer is a plating deviation ratio (maximum thickness / minimum thickness) in the circumferential direction, and there is a problem that this plating deviation ratio tends to be 3 or more.
【０００４】本発明は前記のような問題点を解消するた
めに創案されたもので、その目的とするところは、めっ
きの偏心を避けつつ冷却部からのめっき浴への水滴落下
による品質低下を効果的に防止し、高品質の高付着量溶
融亜鉛めっきを実現できる方法を提供することにある。The present invention was devised in order to solve the above-mentioned problems, and its purpose is to prevent the eccentricity of the plating while avoiding the quality deterioration due to the drop of water droplets from the cooling part into the plating bath. An object of the present invention is to provide a method capable of effectively preventing and realizing high-quality, high-adhesion-weight hot-dip galvanizing.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
本発明は、線状材にめっき付着量２００g/m2以上の溶融
亜鉛めっきを施す方法において、めっき槽からの線状材
の引き上げ角度を垂直から１〜６度の範囲で傾斜させて
行うようにしたものである。本発明において「溶融亜鉛
めっき」とは、溶融純亜鉛めっきのほか、亜鉛をベース
としこれにＡｌ、Ｓｎ、Ｎｉ、Ｍｇなどの１種以上を添
加した溶融亜鉛合金めっきを含む。また、「線状材」は
素線および撚り線を含むものである。In order to achieve the above object, the present invention provides a method of applying a hot-dip galvanizing method to a linear material with a plating adhesion amount of 200 g / m 2 or more. Is tilted within a range of 1 to 6 degrees from the vertical. In the present invention, “hot dip galvanizing” includes hot dip galvanizing and hot dip galvanizing, which is based on zinc and to which one or more of Al, Sn, Ni, Mg and the like are added. Further, the "linear material" includes a strand and a twisted wire.
【０００６】以下本発明添付図面に基いて詳細に説明す
る。図１と図２は本発明によるめっき方法を概略的に示
している。ａは冷間引き抜き加工された線状材、１は線
状材ａの供給スイフト、２は溶融鉛浴であり、４００℃
前後の温度に保持され、前工程の伸線潤滑剤などをバー
ンアウトし、鋼線状材表面の脱脂を行い、次の水冷槽３
において冷却する。５は塩酸浴、６は水洗槽であり、線
状材ａは溶融鉛浴２による処理で生成した薄い酸化膜な
どの異物が除去され、水洗される。The present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 schematically show a plating method according to the present invention. a is a cold drawn linear material, 1 is a supply swift of the linear material a, 2 is a molten lead bath, and 400 ° C.
The temperature is kept at the front and back, the wire drawing lubricant in the previous process is burned out, the surface of the steel wire material is degreased, and the next water cooling tank 3
Cool in. Reference numeral 5 is a hydrochloric acid bath, and 6 is a water washing tank. The linear material a is washed with water by removing foreign substances such as a thin oxide film generated by the treatment with the molten lead bath 2.
【０００７】次に線状材ａはフラックス槽７を通過する
ことによってフラックス処理が行われる。そして、この
ようにフラックス処理された線状材ａは、乾燥炉８を通
過することによってフラックス中の水分が乾燥され、次
いでめっき浴９０を満たしためっき槽９に導入され、め
っき浴９０内に配したシンカーロール１０を経由するこ
とによってめっきされる。Next, the linear material a is subjected to a flux treatment by passing through the flux tank 7. Then, the flux-treated linear material a is dried in the flux by passing through the drying furnace 8 and then introduced into the plating tank 9 filled with the plating bath 90. It is plated by passing through the arranged sinker rolls 10.
【０００８】上記のようにめっきの付着された線状材ａ
はシンカーロール１０を経て上方に導かれ、めっき浴上
に設けられている絞り部１１で付着量が調整されたの
ち、水冷ノズルなどの冷却手段１２によってめっきが凝
固冷却される。溶融めっきの絞りは、木炭、アスベス
ト、あるいはガスグラベルなどの固体絞りでもよいが、
非酸化性ガスによる絞りでもよい。The linear material a to which the plating is applied as described above
Is guided upward through the sinker roll 10 and the amount of adhesion is adjusted by the narrowed portion 11 provided on the plating bath, and then the plating is solidified and cooled by the cooling means 12 such as a water cooling nozzle. The squeeze for hot dipping may be solid squeeze such as charcoal, asbestos, or gas gravel,
A diaphragm using a non-oxidizing gas may be used.
【０００９】かかる工程は従来の方法と同様であるが、
本発明は、線状材ａのめっき槽９からの引き上げを垂直
から傾斜した角度αにとって行うものである。図２はそ
の詳細を示しており、(a)は線状材ａの引き上げ角度を
めっき浴に対し反時計方向側に角度αだけ傾斜させ、冷
却装置１２のやや下方の線状材ａを挾んで反対側に第１
水受け１３を配し、第１水受け１３よりも下位で冷却装
置１２の下側に第２水受け１４を配したものである。
(b)は線状材ａの引き上げ角度をめっき浴に対し時計方
向側に角度αだけ傾斜させ、冷却装置１２のやや下方の
線状材ａを挾んで反対側に第１水受け１３を配し、第１
水受け１３と同じ側でこれよりも下位に第２水受け１４
を配したものである。The steps are similar to the conventional method,
In the present invention, the linear material a is pulled up from the plating tank 9 at an angle α inclined from the vertical. FIG. 2 shows the details thereof. (A) shows that the pulling-up angle of the linear material a is inclined counterclockwise with respect to the plating bath by an angle α, and the linear material a slightly below the cooling device 12 is sandwiched. So on the other side, the first
The water receiver 13 is arranged, and the second water receiver 14 is arranged below the first water receiver 13 and below the cooling device 12.
In (b), the pull-up angle of the linear material a is inclined clockwise by an angle α with respect to the plating bath, and the first water receiver 13 is arranged on the opposite side of the linear material a, which is slightly below the cooling device 12. And first
The second water receiver 14 on the same side as the water receiver 13 and below this
Are arranged.
【００１０】上記のように線状材ａの引き上げ角度が垂
直でなく傾斜しているため、冷却装置１２から線状材ａ
に吹き当てられた水滴ｗは、落下方向が絞り部１１から
離間した関係となる。そして、図２(a)では第２水受け
１４が水滴ｗの落下角度上に位置され、図２(a)では第
１水受け１３と第２水受け１４が水滴ｗの落下角度上に
位置される。このため、水滴ｗがめっき浴９０の表面に
達する前に第１、第２水受け１３，１４によって完全に
回収することができ、絞り部１１やその付近のめっき浴
表面に落下しなくなる。前記線状材ａの引き上げ傾斜角
度αは、これが垂直に近いほど落下する水滴ｗの落下位
置が引き上げ部に近づく。このため、水受けが線状材ａ
と干渉し、めっき浴９０への水滴落下を防止することが
できない。したがって、引き上げ傾斜角度αは少なくと
も１度以上は必要である。As described above, since the pulling angle of the linear material a is not vertical but inclined, the linear material
The drop direction of the water droplet w sprayed on the water droplets is separated from the narrowed portion 11. Then, in FIG. 2A, the second water receiver 14 is positioned on the falling angle of the water droplet w, and in FIG. 2A, the first water receiver 13 and the second water receiver 14 are positioned on the falling angle of the water droplet w. To be done. Therefore, the water droplet w can be completely collected by the first and second water receivers 13 and 14 before reaching the surface of the plating bath 90, and does not drop onto the surface of the narrowed portion 11 or the plating bath in the vicinity thereof. As for the pulling-up inclination angle α of the linear material a, the closer it is to the vertical, the closer the drop position of the water droplet w that falls is to the pulling-up portion. For this reason, the water receiver is
Therefore, it is impossible to prevent water droplets from dropping onto the plating bath 90. Therefore, the pull-up inclination angle α needs to be at least 1 degree or more.
【００１１】しかし、線状材ａの引き上げ傾斜角度αを
あまり大きくすることは、重力の影響によりめっき層の
偏心が大きくなり、品質上の悪影響が生ずる。すなわ
ち、引き上げ傾斜角度αを増加するにつれ重力の影響で
めっき厚みの偏りが大きくなっていく。そこで本発明者
は適正傾斜角を見出すべく、線状材として３．８７mmφ
のワイヤを使用し、めっき付着量５００ｇ／ｍ2での垂
直からの引き上げ角度とめっき偏り比との関係を検討し
た。その結果を示すと図３である。この図３から明らか
なように、引き上げ角度とめっき偏り比の関係は放物線
状となり、引き上げ角度の傾きが小さい範囲でめっき偏
り比の変化が小さい。この傾向は線径やめっき付着量を
異にしても同様であった。従来の垂直引き上げ方式にお
いてめっき偏り比は３以下が要求されており、このめっ
き偏り比３以下を満足するためには、図３から引き上げ
傾斜角度αの上限は約６度であることがわかる。そこで
本発明は引き上げ傾斜角度αを垂直から１〜６度の範囲
としたものであり、この範囲であれば、めっき浴への水
滴の落下を防止できるとともに、めっきの偏心を適正範
囲内に留めることができる。However, if the pulling-up inclination angle α of the linear material a is made too large, the eccentricity of the plating layer becomes large due to the influence of gravity, which adversely affects the quality. That is, as the pull-up inclination angle α is increased, the deviation of the plating thickness becomes larger due to the influence of gravity. Therefore, the inventor of the present invention uses 3.87 mmφ as a linear material in order to find an appropriate inclination angle.
The relationship between the pull-up angle from the vertical and the plating deviation ratio at a coating weight of 500 g / m 2 was examined using the wire No. The result is shown in FIG. As is clear from FIG. 3, the relationship between the pull-up angle and the plating deviation ratio is parabolic, and the change in the plating deviation ratio is small in a range where the tilt of the pull-up angle is small. This tendency was the same even if the wire diameter and the coating weight were different. In the conventional vertical pulling method, a plating deviation ratio of 3 or less is required, and in order to satisfy this plating deviation ratio of 3 or less, it is understood from FIG. 3 that the upper limit of the pulling inclination angle α is about 6 degrees. Therefore, in the present invention, the pulling-up inclination angle α is set within the range of 1 to 6 degrees from the vertical. Within this range, it is possible to prevent water droplets from falling into the plating bath and to keep the eccentricity of the plating within an appropriate range. be able to.
【００１２】[0012]
【実施例】次に本発明の実施例を示す。線径が２.６０
〜３.８７mmφの鋼線に４００℃の溶融鉛浴での脱脂、
濃度１５％の塩酸による酸洗後、水洗し、ZnCl2・NH4Cl
の混合フラックス処理を施し、表１に示すように、線速
３０〜３５m/minのめっき条件、めっき浴組成を亜鉛、
亜鉛−アルミニウム合金の２種とし、めっき浴からの引
き上げ傾斜角度αを種々にとってめっきを行った。得ら
れた亜鉛めっき線の表面状態、めっき付着量、めっき偏
り比を従来の垂直引き上げによる結果と比較して表１に
示す。なお、表面状態は目視によって評価し、◎は極め
て良好、Ｏは良好、△は一部不良、×は不良をそれぞれ
示す。EXAMPLES Examples of the present invention will be described below. Wire diameter is 2.60
〜3.87mmφ steel wire degreasing in 400 ℃ molten lead bath,
After pickling with 15% hydrochloric acid, washing with water, ZnCl 2 · NH 4 Cl
As shown in Table 1, the mixed flux treatment was performed, and the plating condition was set at a linear velocity of 30 to 35 m / min, the plating bath composition was zinc,
Two kinds of zinc-aluminum alloys were used, and plating was performed with various inclination angles α for withdrawing from the plating bath. Table 1 shows the surface condition, the coating adhesion amount, and the plating deviation ratio of the obtained galvanized wire in comparison with the result of the conventional vertical pulling. The surface condition was visually evaluated, and ⊚ indicates extremely good, O indicates good, Δ indicates partly defective, and x indicates defective.
【００１３】[0013]
【表１】 [Table 1]
【００１４】表１から明らかなように、めっき浴からの
引き上げ傾斜角度αが１〜６度のＮｏ．４〜１０(本発
明)はいずれも表面状態が良好で、かつ、めっきの偏り
も小さく、品質が優れていることがわかる。これに対し
て、Ｎｏ．１〜３の従来例は、垂直引き上げであるた
め、水滴の落下によってめっきの表面状態が著しく劣化
している。Ｎｏ．１１〜１３の比較例はめっき浴からの
引き上げ傾斜角度αが大きいため、めっきの偏心が大き
くなり品質が悪い。またＮｏ．１４の比較例はめっき浴
からの引き上げ傾斜角度αが小さすぎるため水滴のめっ
き浴表面への落が生じたため、めっき表面状態が悪くな
っている。As is clear from Table 1, No. 1 having a tilt angle α of lifting from the plating bath of 1 to 6 degrees. It can be seen that all of Nos. 4 to 10 (invention) have a good surface condition, the deviation of plating is small, and the quality is excellent. On the other hand, No. Since the conventional examples 1 to 3 are vertical pulling up, the surface condition of the plating is significantly deteriorated by the drop of water droplets. No. In Comparative Examples 11 to 13, since the inclination angle α for withdrawing from the plating bath is large, the eccentricity of the plating is large and the quality is poor. In addition, No. In Comparative Example No. 14, since the pulling-up inclination angle α from the plating bath was too small, water droplets dropped onto the surface of the plating bath, and the state of the plating surface was poor.
【００１５】[0015]
【発明の効果】以上説明した本発明によるときには、付
着量が２００g/m2以上の高付着量の溶融亜鉛めっきを行
うに際して、めっき浴からの線状材または条材の引き上
げ角度を垂直から１〜６度の範囲で傾斜したため、水滴
のめっき浴表面への落下を防止することができ、それに
よりめっきの表面性状を良くすることができ、かつ、過
大な傾斜角度で引き上げられないためめっきの偏りも規
定範囲にすることができ、高品質のめっきを施すことが
できる。さらに、水滴落下防止のためのエアの送風をし
なくても済むため、電力費の節減も図ることができるな
どのすぐれた効果が得られる。According to the present invention described above, when performing hot dip galvanizing with a high adhesion amount of 200 g / m 2 or more, the pulling angle of the linear material or strip from the plating bath is 1 Since it is tilted within the range of ~ 6 degrees, it is possible to prevent water droplets from falling onto the surface of the plating bath, which can improve the surface quality of the plating, and because it cannot be pulled up at an excessive tilt angle, The deviation can be within the specified range, and high quality plating can be performed. Furthermore, since it is not necessary to blow air to prevent water droplets from falling, it is possible to obtain excellent effects such as reduction of electric power cost.
【図１】本発明によるめっき法の工程の一例を示す説明
図である。FIG. 1 is an explanatory diagram showing an example of steps of a plating method according to the present invention.
【図２】本発明における線状材類の引き上げ状態を示す
説明図である。FIG. 2 is an explanatory view showing a pulled-up state of linear materials according to the present invention.
【図３】線状材類の引き上げ角度とめっき偏り比の関係
を示す線図である。FIG. 3 is a diagram showing a relationship between a pulling angle of a linear material and a plating deviation ratio.
【図４】従来のめっき法における線状材類の引き上げ状
態を示す説明図である。FIG. 4 is an explanatory view showing a state in which linear materials are pulled up in a conventional plating method.
９ めっき槽 １１ 絞り部 １２ 冷却手段 １３，１４ 水受け α 線状材類の引き上げ角度 9 Plating tank 11 Throttling part 12 Cooling means 13,14 Water receiver α Pulling angle of linear materials
Claims (1)
融亜鉛めっきを施す方法において、めっき槽からの線材
または条材の引き上げ角度を垂直から１〜６度の範囲で
傾斜させて行うようにしたことを特徴とする高品質高付
着量溶融亜鉛めっき方法。1. A method of applying hot dip galvanizing to a linear material with a coating adhesion amount of 200 g / m 2 or more, in which the pulling angle of the wire or strip from the plating tank is inclined within a range of 1 to 6 degrees from the vertical. A high-quality, high-adhesion-weight hot-dip galvanizing method characterized by being carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26055692A JP2619771B2 (en) | 1992-09-04 | 1992-09-04 | High quality, high coating weight galvanizing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26055692A JP2619771B2 (en) | 1992-09-04 | 1992-09-04 | High quality, high coating weight galvanizing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0688189A true JPH0688189A (en) | 1994-03-29 |
| JP2619771B2 JP2619771B2 (en) | 1997-06-11 |
Family
ID=17349601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26055692A Expired - Lifetime JP2619771B2 (en) | 1992-09-04 | 1992-09-04 | High quality, high coating weight galvanizing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2619771B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011149130A (en) * | 2010-01-22 | 2011-08-04 | Yokohama Rubber Co Ltd:The | Rubber reinforcement steel cord and production method therefor |
-
1992
- 1992-09-04 JP JP26055692A patent/JP2619771B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011149130A (en) * | 2010-01-22 | 2011-08-04 | Yokohama Rubber Co Ltd:The | Rubber reinforcement steel cord and production method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2619771B2 (en) | 1997-06-11 |
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