JPH10317180A - Production of cold rolled and plated steel sheet - Google Patents
Production of cold rolled and plated steel sheetInfo
- Publication number
- JPH10317180A JPH10317180A JP14713297A JP14713297A JPH10317180A JP H10317180 A JPH10317180 A JP H10317180A JP 14713297 A JP14713297 A JP 14713297A JP 14713297 A JP14713297 A JP 14713297A JP H10317180 A JPH10317180 A JP H10317180A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- cold
- cleaning
- rolled
- liquid
- 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.)
- Withdrawn
Links
Landscapes
- Electroplating Methods And Accessories (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、表面欠陥のない美
麗な冷延めっき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 beautiful cold-rolled steel sheet having no surface defects.
【0002】[0002]
【従来の技術】飲料缶等に使用される冷延めっき鋼板
は、その衛生上及び美観上の要請から特に、表面性状が
均質で清浄かつ美麗な印象を与えるものが必要とされて
いる。そして、鋼板にスズ(Tin)めっきしてなるブ
リキ材や、クロムめっき等の施されたティンフリースチ
ール材(TFS:Tin−Free−Steel)とい
った飲料缶等の素材は、製缶メーカー等のユーザーの品
質要求レベルが高まるのに伴い、表面外観の美麗さの向
上がより高い水準で要求されている。飲料缶用等のブリ
キ材やTFS材はめっき被膜の厚みが極めて薄いため
に、美麗なめっき外観の形成には、めっき方法の改善の
みならず、めっき原板としての冷延鋼板の清浄度を高め
ておく必要がある。冷延鋼板の清浄度を低下させるもの
の代表例は特開平7−70799号公報に示されている
ような酸化膜の生成であり、前記公報においては、鋼板
をアルカリ電解槽でアルカリ電解洗浄、水洗の後、ゴム
製リンガーロールで圧着させて、液切りを行い、更にそ
の上段で水分測定装置で鋼板の付着水分量を測定して、
所定の量を超えた場合は、ゴム製リンガーロールの押付
装置を調整して、所定の水分量以下にしてから、吸水リ
ンガーロールで付着水分を排除し、高温乾燥器で10m
g/m2 以下に残存付着水分を調整して、焼鈍される冷
延鋼板が示され、これによって前記原板に形成される酸
化膜の厚さを30オングストローム以下にした冷延鋼板
が提案されている。また、特開平6−262241号公
報には、吸液リンガーロールの閉止時、金属帯異幅接合
部通過時あるいは金属帯加速時の3つの類型の非定常状
態のうち何れかの非定常状態になる時を予め感知して、
該非定常状態に変わった時に、前記吸液リンガーロール
の吸引真空圧力を一時的に高めることにより、その吸引
流量を上昇せしめ、液切れ能力応答遅れの時間を短縮す
る方法が提案されている。2. Description of the Related Art Cold rolled plated steel sheets used for beverage cans and the like are required to have a clean and beautiful impression with a uniform surface property, particularly in view of hygiene and aesthetic requirements. Materials such as tin cans made of tin-plated steel and tin-free-steel (TFS: Tin-Free-Steel) plated with chrome are used by users such as can manufacturers. As the quality requirement level of the GaN increases, the improvement of the surface appearance is required at a higher level. Tinplate and TFS materials for beverage cans and the like have a very thin plating film, so not only to improve the plating method, but also to increase the cleanliness of the cold-rolled steel sheet as the original plate for forming beautiful plating appearance. Need to be kept. A typical example of a method for reducing the cleanliness of a cold-rolled steel sheet is formation of an oxide film as disclosed in Japanese Patent Application Laid-Open No. 7-70799. After that, it is pressed with a rubber ringer roll, drains the liquid, and further measures the amount of water adhering to the steel plate with a moisture measuring device in the upper stage,
If the amount exceeds the predetermined amount, adjust the pressing device of the rubber ringer roll to adjust the amount of water to be equal to or less than the predetermined amount of water.
A cold-rolled steel sheet to be annealed by adjusting the residual moisture content to not more than g / m 2 has been proposed, and a cold-rolled steel sheet having an oxide film formed on the original sheet having a thickness of 30 Å or less has been proposed. I have. Japanese Patent Application Laid-Open No. Hei 6-262241 discloses that any one of three types of unsteady states, that is, when the liquid-absorbing ringer roll is closed, when the metal strip passes through a different-width joining portion, or when the metal strip is accelerated, is set to be in an unsteady state. It senses in advance when it will be
A method has been proposed in which, when the state changes to the unsteady state, the suction vacuum pressure of the liquid-absorbing ringer roll is temporarily increased to increase the suction flow rate, thereby shortening the response delay time of the liquid drainage capability.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、前記特
開平7−70799号公報に記載の冷延鋼板にめっき処
理を行って、これを飲料缶等として使用する方法の場合
には以下の〜に示すような問題点があった。 水洗時に使用する洗浄水あるいはアルカリ電解洗浄の
際の洗浄液中には、洗浄過程、高温乾燥過程で原板に濃
縮して固形分として付着する残渣成分が含まれており、
この残渣成分が付着した鋼板を高温で焼鈍すると、この
残渣成分が鋼板表面と反応して、固有の反応物を生成す
る。そして、このような反応物は以降の酸洗処理等によ
っても容易に除去することができず、反応物の形成され
た鋼板にめっき処理を施すと、めっき表面に筋状模様が
形成され、飲料缶としての外観が著しく阻害される。 前記筋状模様は、リンガーロールが鋼板表面に圧着さ
れて接触する際に、リンガーロールの回転方向に沿って
水滴が筋状に残留して形成される傾向にあり、リンガー
ロールの押付装置に掛かる押付け圧力の調整によって、
これを完全に除去することは困難である。 鋼板上に形成される酸化膜は以降の酸洗処理により容
易に除去できるので、生産上の負荷は小さく、一方、付
着水分の調整に必要とするコスト分のみが増大するとい
う問題があった。さらに、前記特開平6−262241
号公報に記載の吸液リンガーロールを用いる方法では、
吸液リンガーロールに付加する吸引真空圧力を調整する
ための制御機構が必要であり、さらにこの管理が煩雑と
なる問題点があった。本発明はこのような事情に鑑みて
なされたもので、鋼板の焼鈍中に生じる有害な反応物の
生成を抑制して、表面性状の均一な冷延めっき鋼板を容
易に、かつ効率的に生産することのできる冷延めっき鋼
板の製造方法を提供することを目的とする。However, in the case of a method in which a cold-rolled steel sheet described in Japanese Patent Application Laid-Open No. 7-70799 is plated and used as a beverage can or the like, the following is shown. There was such a problem. The washing water used in washing with water or the washing solution used in alkaline electrolytic washing contains residue components that are concentrated on the original plate and adhered as solids in the washing process and high-temperature drying process,
When the steel sheet to which the residue component adheres is annealed at a high temperature, the residue component reacts with the surface of the steel sheet to generate a unique reactant. Such a reactant cannot be easily removed by a subsequent pickling treatment or the like. When a steel sheet on which the reactant is formed is subjected to plating treatment, a streak pattern is formed on the plated surface, and the The appearance as a can is significantly impaired. When the ringer roll is pressed against the steel plate surface and comes into contact with the ringer roll, water droplets tend to remain in a streak shape along the rotation direction of the ringer roll, and are hung on the pressing device of the ringer roll. By adjusting the pressing pressure,
It is difficult to completely remove this. Since the oxide film formed on the steel plate can be easily removed by the subsequent pickling treatment, the load on production is small, but on the other hand, there is a problem that only the cost required for adjusting the amount of adhering water increases. Further, Japanese Patent Application Laid-Open No.
In the method using the absorbent ringer roll described in
A control mechanism for adjusting the suction vacuum pressure applied to the liquid-absorbing ringer roll is required, and this management is complicated. The present invention has been made in view of such circumstances, and suppresses generation of harmful reactants generated during annealing of a steel sheet to easily and efficiently produce a cold-rolled plated steel sheet having a uniform surface texture. It is an object of the present invention to provide a method for producing a cold-rolled plated steel sheet that can be performed.
【0004】[0004]
【課題を解決するための手段】前記目的に沿う請求項1
記載の冷延めっき鋼板の製造方法は、冷間圧延して得ら
れる薄肉鋼板を処理液に浸漬して表面付着物を除去した
後、洗浄液に浸漬して、これを洗浄鋼板として、次に該
洗浄鋼板を焼鈍処理し、スズ、クロム等のめっき処理を
施す冷延めっき鋼板の製造方法において、前記洗浄鋼板
に付着する硫酸分付着量及び/又は塩素分付着量を調整
して、前記焼鈍処理における硫酸分及び塩素分と前記洗
浄鋼板との反応を抑制し前記めっき処理後に発生する表
面欠陥を防止する。請求項2記載の冷延めっき鋼板の製
造方法は、請求項1記載の冷延めっき鋼板の製造方法に
おいて、前記硫酸分付着量及び/又は前記塩素分付着量
を、前記薄肉鋼板に付着する前記洗浄液の液切りを行う
第1の液切り装置、液切り後に水蒸気を該薄肉鋼板に吹
付ける水蒸気洗浄装置、及び該水蒸気洗浄装置から取り
出される該薄肉鋼板の液切りを行う第2の液切り装置を
用いて調整する。請求項3記載の冷延めっき鋼板の製造
方法は、請求項1又は2記載の冷延めっき鋼板の製造方
法において、前記洗浄鋼板の硫酸分付着量を0.7mg
/m2 以下に制御する。請求項4記載の冷延めっき鋼板
の製造方法は、請求項1〜3のいずれか1項に記載の冷
延めっき鋼板の製造方法において、前記洗浄鋼板の塩素
分付着量を1.4mg/m2 以下に制御する。請求項5
記載の冷延めっき鋼板の製造方法は、請求項1〜4のい
ずれか1項に記載の冷延めっき鋼板の製造方法におい
て、前記冷延めっき鋼板が飲料缶用のめっき鋼板であ
る。According to the present invention, there is provided a semiconductor device comprising:
The method for producing a cold-rolled plated steel sheet according to the method described above is to immerse a thin steel sheet obtained by cold rolling in a treatment liquid to remove surface deposits, and then immerse the cleaning liquid in a cleaning liquid, and then use this as a cleaning steel sheet. In the method for producing a cold-rolled steel sheet in which a washed steel sheet is annealed and plated with tin, chromium, or the like, the amount of sulfuric acid and / or the amount of chlorine adhering to the washed steel sheet is adjusted, and the annealing treatment is performed. And the reaction between the sulfuric acid component and chlorine component and the cleaning steel sheet in the above is suppressed, and surface defects generated after the plating treatment are prevented. The method for producing a cold-rolled plated steel sheet according to claim 2 is the method for producing a cold-rolled plated steel sheet according to claim 1, wherein the sulfuric acid content and / or the chlorine content are attached to the thin steel plate. A first draining device for draining a cleaning liquid, a steam cleaning device for spraying steam to the thin steel plate after draining, and a second draining device for draining the thin steel plate taken out from the steam cleaning device Adjust using. The method for producing a cold-rolled steel sheet according to claim 3 is the method for producing a cold-rolled steel sheet according to claim 1 or 2, wherein the sulfuric acid content of the washed steel sheet is 0.7 mg.
/ M 2 or less. The method for producing a cold-rolled plated steel sheet according to claim 4 is the method for producing a cold-rolled plated steel sheet according to any one of claims 1 to 3, wherein a chlorine content of the washed steel sheet is 1.4 mg / m. Control to 2 or less. Claim 5
In the method for producing a cold-rolled steel sheet according to any one of claims 1 to 4, the cold-rolled steel sheet is a plated steel sheet for a beverage can.
【0005】硫酸分付着量とは、薄肉鋼板の付着物にお
ける硫酸化合物中の硫酸根(SO4)の重量を薄肉鋼板
の単位面積当たりに換算した値をいう。塩素分含有量と
は、薄肉鋼板に残留する付着物における塩素化合物中の
塩素(Cl)の重量を薄肉鋼板の単位面積当たりに換算
した値をいう。冷延めっき鋼板には、鋼板にスズめっき
してなる一般的なブリキ材、及びスズを含有しないクロ
ムめっきされた鋼板TFS(ティンフリースチール材)
等が含まれる。洗浄鋼板の硫酸分付着量が0.7mg/
m2 を超える場合には、洗浄鋼板を焼鈍する際に、硫酸
分と鋼板の成分とが反応して、これをめっき処理した後
に、筋状の液残り模様等の表面欠陥発生率を増大させる
要因となるので好ましくない。洗浄鋼板の塩素分付着量
についても、塩素分付着量が1.4mg/m2 を超える
と、同様に洗浄鋼板の焼鈍時に塩素分と鋼板成分との反
応が起こり、これをめっき処理した後の表面欠陥の発生
がより顕著になる。[0005] The sulfuric acid content is a value obtained by converting the weight of the sulfate group (SO 4 ) in the sulfate compound in the deposit on the thin steel plate into a unit area of the thin steel plate. The chlorine content refers to a value obtained by converting the weight of chlorine (Cl) in the chlorine compound in the deposits remaining on the thin steel sheet into a unit area of the thin steel sheet. The cold-rolled steel sheet is a common tin material obtained by tinning the steel sheet, and a tin-free chrome-plated steel sheet TFS (tin-free steel material)
Etc. are included. 0.7mg /
In the case of exceeding m 2 , the sulfuric acid component reacts with the components of the steel sheet when annealing the washed steel sheet, and after plating this, increases the incidence of surface defects such as streak-like residual liquid patterns. It is not preferable because it becomes a factor. Regarding the chlorine content of the cleaned steel sheet, if the chlorine content exceeds 1.4 mg / m 2 , a reaction between the chlorine content and the steel sheet component occurs similarly during the annealing of the washed steel sheet, and this is subjected to a plating treatment. The occurrence of surface defects becomes more remarkable.
【0006】本発明によれば、電気めっきラインの上流
に設置されている電解酸洗又は浸漬酸洗設備において除
去困難なFe−S系複合酸化物や、塩素に起因した鉄化
合物の生成を抑制して、鉄酸化物等の異常成長を防止で
き、美麗なめっき外観の冷延めっき鋼板の製造が可能と
なる。また、一度液切りした後に水蒸気を薄肉鋼板に吹
付けることで、有害な前記化合物をさらに効率的に除去
できるので、純水等の高価な洗浄水の使用あるいは管理
の難しい吸液リンガーロール等の使用を回避でき、製造
コストの増加やリンガーロール交換のためのライン停止
を最少限度に抑制できる。According to the present invention, it is possible to suppress the production of Fe-S based composite oxides and chlorine-induced iron compounds which are difficult to remove in an electrolytic pickling or immersion pickling facility installed upstream of an electroplating line. As a result, abnormal growth of iron oxide and the like can be prevented, and a cold-rolled plated steel sheet having a beautiful plated appearance can be manufactured. In addition, by spraying water vapor on the thin steel plate after draining once, the harmful compound can be more efficiently removed, so that use of expensive washing water such as pure water or a liquid absorbing ringer roll or the like which is difficult to manage is used. Use can be avoided, and increase in production cost and line stoppage for ringer roll replacement can be minimized.
【0007】[0007]
【発明の実施の形態】続いて、添付した図面を参照しつ
つ、本発明を具体化した実施の形態につき説明し、本発
明の理解に供する。ここに図1は本発明の第1の実施の
形態に係る冷延めっき鋼板の製造方法を適用した冷延め
っき鋼板製造設備の説明図、図2は液残り模様発生評価
と硫酸分付着量との関係を示す図、図3は液残り模様発
生評価と塩素分付着量との関係を示す図、図4は液残り
模様発生評価とナトリウム分付着量との関係を示す図、
図5は液残り模様発生評価とカルシウム分付着量との関
係を示す図、図6は液残り模様発生評価と水酸分付着量
との関係を示す図、図7は本発明の第2の実施の形態に
係る冷延めっき鋼板の製造方法を適用した冷延めっき鋼
板製造設備の説明図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is an explanatory view of a cold-rolled plated steel sheet production equipment to which the method for producing a cold-rolled plated steel sheet according to the first embodiment of the present invention is applied, and FIG. FIG. 3 is a diagram showing the relationship between the evaluation of remaining liquid pattern generation and the amount of attached chlorine, FIG. 4 is a diagram showing the relationship between the evaluation of occurrence of remaining liquid pattern and the amount of attached sodium,
FIG. 5 is a diagram showing the relationship between the evaluation of the appearance of the remaining liquid pattern and the amount of attached calcium, FIG. 6 is a diagram showing the relationship between the evaluation of the appearance of the remaining liquid pattern and the amount of attached hydroxyl, and FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the cold rolling plated steel plate manufacturing equipment which applied the manufacturing method of the cold rolled plated steel plate which concerns on embodiment.
【0008】本発明の第1の実施の形態に係る冷延めっ
き鋼板の製造方法を適用する冷延めっき鋼板製造設備1
0は図1に示すように、薄肉鋼板11を処理液の一例で
ある脱脂液12に浸漬させて脂分等の表面付着物を除去
するための脱脂処理槽14と、脱脂処理槽14で処理さ
れた薄肉鋼板11を洗浄液15に浸漬させて脱脂液12
等を除去するための洗浄槽16(リンス槽ともいう)
と、洗浄槽16から引き上げられる薄肉鋼板11の液切
りを行うための液切り装置の一例であるリンガーロール
17と、リンガーロール17で処理された洗浄鋼板18
に付着する残渣成分の量を測定するための成分分析装置
19と、洗浄鋼板18を焼鈍して所定の軟らかさに調整
するための焼鈍炉20と、焼鈍された焼鈍鋼板21を調
圧処理し、焼鈍炉20等で生成した酸化膜を酸洗処理し
て除いた後、スズあるいはクロム等がめっきされた冷延
めっき鋼板23を得るためのめっき処理装置22とを有
している。[0008] Cold rolled steel sheet manufacturing equipment 1 to which the method for manufacturing a cold rolled steel sheet according to the first embodiment of the present invention is applied.
0 is a degreasing treatment tank 14 for immersing the thin steel plate 11 in a degreasing liquid 12 which is an example of a treatment liquid to remove surface deposits such as grease, as shown in FIG. The thin steel plate 11 thus obtained is immersed in the cleaning liquid 15 to remove the degreasing liquid 12.
Cleaning tank 16 (also called a rinsing tank)
A ringer roll 17 which is an example of a drainer for draining the thin steel plate 11 pulled up from the cleaning tank 16, and a washed steel plate 18 treated by the ringer roll 17
A component analyzer 19 for measuring the amount of residual components adhering to the steel sheet, an annealing furnace 20 for annealing the cleaning steel sheet 18 to adjust it to a predetermined softness, and pressure-controlling the annealed annealing steel sheet 21. And a plating apparatus 22 for obtaining a cold-rolled plated steel sheet 23 plated with tin or chromium after removing an oxide film formed in the annealing furnace 20 by pickling.
【0009】脱脂処理槽14は、水酸化ナトリウム(N
aOH)水溶液等の脱脂液12を保持する溶液タンクで
あり、槽内に配置された浸漬ロール13を介して供給さ
れる薄肉鋼板11を連続的に処理して、冷延工程等で薄
肉鋼板11に付着した脂分等を溶出して除去することが
できる。なお、脱脂処理槽14に代えて、アルカリ電解
洗浄を行う電解浴槽を用いることもでき、薄肉鋼板11
を電解浴と脱脂液12とで連続的に表面処理を行っても
よい。洗浄槽16は工業用水等の洗浄液15に薄肉鋼板
11を浸漬させて、その表面に付着する処理液12等を
連続的に洗浄するための装置である。リンガーロール1
7は、ウレタンゴム等からなる一対のロール間に薄肉鋼
板11を送入して、薄肉鋼板11の表裏をロールで挟み
付けて圧着して、表面に付着する水分等の液切りを行っ
て洗浄鋼板18とするための装置である。図1において
は、一対のリンガーロール17を配置する場合を示して
いるが、必要に応じて、2組以上のリンガーロールを洗
浄槽16と焼鈍炉20間に配置することもできる。The degreasing tank 14 contains sodium hydroxide (N
aOH) a solution tank for holding a degreasing solution 12 such as an aqueous solution, which continuously processes a thin steel sheet 11 supplied through a dipping roll 13 disposed in the tank, and performs a thin-rolled steel sheet 11 in a cold rolling process or the like. Can be removed by eluting fats and the like adhering to the surface. Note that, instead of the degreasing tank 14, an electrolytic bath for performing alkaline electrolytic cleaning can also be used.
May be continuously subjected to a surface treatment with an electrolytic bath and a degreasing solution 12. The cleaning tank 16 is an apparatus for immersing the thin steel plate 11 in a cleaning liquid 15 such as industrial water or the like to continuously clean the processing liquid 12 or the like adhering to the surface thereof. Ringer roll 1
7, a thin steel plate 11 is fed between a pair of rolls made of urethane rubber or the like, the front and back of the thin steel plate 11 are sandwiched between rolls and pressed, and drainage of water or the like adhering to the surface is performed for cleaning. This is a device for forming a steel plate 18. FIG. 1 shows a case where a pair of ringer rolls 17 are arranged, but two or more ringer rolls can be arranged between the cleaning tank 16 and the annealing furnace 20 as necessary.
【0010】成分分析装置19は、洗浄鋼板18に付着
する硫酸分、塩素分、カルシウム分、ナトリウム分、水
酸基分等を測定するための装置であり、例えば洗浄鋼板
18の一部を切り取って試験片を作成して、所定面積の
試験片を抽出液に浸漬させた後、該抽出液中に含まれる
各イオンの量を測定することにより、洗浄鋼板18の単
位面積当たりの各成分毎に換算された付着量を算出する
化学分析装置、あるいはX線分光分析の原理等を適用し
た分析装置等を適用できる。また、前記成分分析装置1
9に代わる付着量の測定手段としては、脱脂処理槽1
4、洗浄槽16、及びリンガーロール17における処理
条件毎に洗浄鋼板18に付着する特定成分の付着量を化
学分析等により予め測定してデータ表を作成しておき、
このデータ表に基づいて実際の処理条件に対応する付着
量を決定することも可能である。さらに、洗浄液15中
の塩素イオン濃度Cc (mg/リットル)、硫酸イオン
濃度Cs (mg/リットル)等の成分濃度、及び単位面
積当たりの洗浄鋼板18に付着する洗浄液15の付着量
Wa (mg/m2 )を測定して、洗浄液15の揮発分を
除去した時に固形分として残留する塩素分付着量W
c (=Kc ×Cc ×Wa )、硫酸分付着量Ws (=Ks
×Cs ×Wa )を算出してもよい。なお、各付着量の単
位はmg/m2 であり、Kc 、Ks は各成分毎に設定さ
れる変換係数である。焼鈍炉20は、洗浄鋼板18を連
続的に例えば600〜780℃、好ましくは650〜7
00℃の範囲に加熱して、冷間圧延等によって加工硬化
した鋼板の硬さを所定範囲に調整する装置である。硫酸
分、塩素分が付着した洗浄鋼板18を焼鈍炉20で加熱
処理すると、硫酸分、塩素分が鋼板と反応して、以降の
めっき処理の後に、流れ模様等の表面欠陥の原因となり
易い。The component analyzer 19 is a device for measuring sulfuric acid, chlorine, calcium, sodium, hydroxyl group and the like adhering to the cleaning steel plate 18. For example, a part of the cleaning steel plate 18 is cut and tested. After preparing a piece, a test piece having a predetermined area is immersed in the extract, and the amount of each ion contained in the extract is measured, thereby converting each component per unit area of the washed steel sheet 18. A chemical analyzer that calculates the attached amount, an analyzer that applies the principle of X-ray spectroscopy, or the like can be applied. In addition, the component analyzer 1
As a means for measuring the amount of adhesion in place of 9, the degreasing tank 1
4. For each treatment condition in the cleaning tank 16 and the ringer roll 17, a data table is prepared by previously measuring the amount of the specific component adhering to the cleaning steel plate 18 by chemical analysis or the like,
It is also possible to determine the amount of adhesion corresponding to the actual processing condition based on this data table. Further, the chlorine ion concentration C c in the cleaning liquid 15 (mg / l), coating weight W a of the cleaning liquid 15 adhering component concentrations such as sulfuric acid ion concentration C s (mg / liter), and washed steel plate 18 per unit area (Mg / m 2 ), and the chlorine content W remaining as a solid content when the volatile components of the cleaning liquid 15 are removed.
c (= K c × C c × W a), sulfuric acid content coating weight W s (= K s
× C s × W a ) may be calculated. The unit of each adhesion amount is mg / m 2 , and K c and K s are conversion coefficients set for each component. The annealing furnace 20 continuously feeds the washed steel sheet 18 to, for example, 600 to 780 ° C., preferably 650 to 7000C.
This is a device that heats to a temperature of 00 ° C. and adjusts the hardness of the steel sheet work-hardened by cold rolling or the like to a predetermined range. When the washed steel sheet 18 to which sulfuric acid and chlorine are adhered is subjected to heat treatment in the annealing furnace 20, the sulfuric acid and chlorine react with the steel sheet, and tend to cause surface defects such as flow patterns after the subsequent plating.
【0011】続いて、前記冷延めっき鋼板製造設備10
に適用する本発明の第1の実施の形態に係る冷延めっき
鋼板の製造方法について説明する。まず、図示しないコ
イル払い出し機から取り出される冷間圧延された薄肉鋼
板11を脱脂処理槽14で処理液12に浸漬して脱脂処
理を行う。次に、処理された薄肉鋼板11を洗浄槽16
に浸漬させ、所定の搬送速度、洗浄液温度、洗浄液成分
となる洗浄条件で処理して、洗浄液15から引き上げた
後、所定の圧着圧力、回転数に設定されたリンガーロー
ル17を通過させて洗浄鋼板18とする。この洗浄鋼板
18に付着する硫酸分、及び塩素分等の付着量を測定し
た後、焼鈍炉20に送入して洗浄鋼板18の焼鈍処理を
行う。そして、めっき処理装置22に焼鈍された焼鈍鋼
板21を送入して、最終的にクロムめっき、あるいはス
ズめっきされた冷延めっき鋼板23を得ることができ
る。なお、焼鈍鋼板21は、焼鈍炉20から直接めっき
処理装置22に送入することなく、一旦、図示しない卷
き取り機に卷き取って保持してもよい。このような冷延
めっき鋼板23は洗浄鋼板18の焼鈍過程で、洗浄鋼板
18に付着する有害成分が鋼板の成分と反応して、この
部分がめっき処理によって液残り模様と称される表面欠
陥として発現することが本発明者らの以下に示す実験に
よって明らかになった。本実施の形態においては、前記
洗浄鋼板18における硫酸分付着量、塩素分付着量を実
験結果に基づいて設定される表面欠陥発生の限界値以下
に制御することにより、めっき処理された冷延めっき鋼
板23に発生する表面欠陥の防止を図るものである。Subsequently, the cold-rolled steel sheet manufacturing equipment 10
A method for manufacturing a cold-rolled plated steel sheet according to the first embodiment of the present invention applied to the present invention will be described. First, a cold-rolled thin steel plate 11 taken out from a coil dispenser (not shown) is immersed in a treatment liquid 12 in a degreasing tank 14 to perform a degreasing treatment. Next, the treated thin steel plate 11 is removed from the cleaning tank 16.
After being treated under a predetermined transport speed, a cleaning liquid temperature, and cleaning conditions to be a cleaning liquid component, pulled up from the cleaning liquid 15, and passed through a ringer roll 17 set at a predetermined pressure and a predetermined number of rotations, the cleaning steel plate is washed. It is assumed to be 18. After measuring the amounts of sulfuric acid and chlorine adhering to the cleaning steel sheet 18, the cleaning steel sheet 18 is sent to an annealing furnace 20, where the cleaning steel sheet 18 is annealed. Then, the annealed annealed steel sheet 21 is fed into the plating apparatus 22 to finally obtain a cold-rolled plated steel sheet 23 plated with chromium or tin. Note that the annealed steel sheet 21 may be once wound and held by a winder (not shown) without being directly sent from the annealing furnace 20 to the plating apparatus 22. In such a cold-rolled steel sheet 23, during the annealing process of the cleaning steel sheet 18, the harmful component adhering to the cleaning steel sheet 18 reacts with the component of the steel sheet, and this portion becomes a surface defect called a liquid residue pattern by the plating process. The expression was revealed by the experiments shown below by the present inventors. In the present embodiment, by controlling the sulfuric acid content and the chlorine content in the cleaning steel sheet 18 to be equal to or less than the limit value of the occurrence of surface defects set based on the experimental results, The purpose is to prevent surface defects occurring in the steel plate 23.
【0012】図2〜図6はそれぞれ、洗浄鋼板18に付
着する硫酸分、塩素分、ナトリウム分、カルシウム分、
及び水酸分の付着量と、冷延めっき鋼板23の液残り模
様発生評価との関係を実験的に求めた結果を示すもので
ある。ここで、液残り模様発生評価は、酸化膜を除去
した酸洗後及びめっき後にも液残り模様の発現しない状
態(記号:○)、酸洗後に液残り模様が発現するが、
めっき後には発現しない状態(記号:△)、及びめっ
き後に液残り模様が発現する状態(記号:×)の三段階
評価〜を表している。なお、図2〜図6の斜線で示
す領域は、リンガーロール17出側で測定される洗浄鋼
板18の表面に付着する洗浄液15の単位面積当たりの
重量W(mg/m2 )と洗浄液15に含まれる各成分濃
度C(wt%)との積(=W×C)を基にして設定され
る実機における各付着量の変動範囲の一例を示してい
る。FIGS. 2 to 6 show sulfuric acid, chlorine, sodium, calcium,
It shows the result of experimentally determining the relationship between the adhesion amount of hydroxyl and the amount of hydroxyl content and the evaluation of the occurrence of a residual liquid pattern on the cold-rolled plated steel sheet 23. Here, the remaining liquid pattern generation evaluation is such that the remaining liquid pattern does not appear after pickling and plating after removing the oxide film (symbol: ○), and the remaining liquid pattern appears after pickling.
The three-level evaluation of a state that does not appear after plating (symbol: Δ) and a state that a residual liquid pattern appears after plating (symbol: ×) are shown. 2 to 6 indicate the weight W (mg / m 2 ) per unit area of the cleaning liquid 15 adhered to the surface of the cleaning steel plate 18 measured on the exit side of the ringer roll 17 and the cleaning liquid 15. An example of a variation range of each adhesion amount in an actual machine, which is set based on a product (= W × C) of each component concentration C (wt%) included therein, is shown.
【0013】図4〜図6から明らかなように、ナトリウ
ム(Na)分、カルシウム(Ca)分、及び水酸分(O
H)の各付着量が増減しても液残り模様は発生せず(記
号:○)、この付着量の影響は皆無であることが分か
る。これに対して、図2、及び図3に示す硫酸分、塩素
分付着量の場合には、それぞれの付着量の増大に伴っ
て、液残り模様発生評価が悪化していくことが分かる。
従って、硫酸分付着量、及び塩素分付着量を液残り模様
の発生の少ない特定範囲に調整することで、めっき処理
後における表面欠陥の発生を防止することが可能であ
る。例えば、図2、図3に示されるように硫酸分付着
量、塩素分付着量をそれぞれ0.7mg/m2 、1.4
mg/m2 以下に制御することにより、めっき処理後に
おける液残り模様が発生しない状態(記号:△、○)と
することができる。このような付着量の調整は、例えば
洗浄液15中の硫酸イオン濃度、塩素イオン濃度、リン
ガーロールの押付圧力、薄肉鋼板11のリンガーロール
17への供給速度等を制御すること等で行うことができ
る。これによって、美麗なめっき外観を有する冷延めっ
き鋼板23を効率的に製造でき、特に外観評価が厳しく
要求される飲料缶用途に適するめっき鋼板を得ることが
できる。As apparent from FIGS. 4 to 6, sodium (Na), calcium (Ca), and hydroxyl (O)
Even if the amount of each of H) increases or decreases, no liquid remaining pattern occurs (symbol:)), indicating that there is no influence of the amount of the adhesion. On the other hand, in the case of the sulfuric acid and chlorine adhering amounts shown in FIGS. 2 and 3, it can be seen that the evaluation of the occurrence of the liquid remaining pattern worsens as the adhering amounts of the respective components increase.
Therefore, by adjusting the sulfuric acid content and the chlorine content to a specific range where the residual liquid pattern is less likely to occur, it is possible to prevent the occurrence of surface defects after the plating process. For example, as shown in FIGS. 2 and 3, the sulfuric acid content and the chlorine content were 0.7 mg / m 2 and 1.4, respectively.
By controlling the concentration to not more than mg / m 2 , it is possible to achieve a state (symbol: Δ, ○) in which no residual liquid pattern occurs after the plating treatment. Such adjustment of the amount of adhesion can be performed, for example, by controlling the sulfate ion concentration and the chloride ion concentration in the cleaning liquid 15, the pressure of the ringer roll, the supply speed of the thin steel plate 11 to the ringer roll 17, and the like. . This makes it possible to efficiently manufacture the cold-rolled plated steel sheet 23 having a beautiful plated appearance, and to obtain a plated steel sheet suitable for use in beverage cans, in which appearance evaluation is strictly required.
【0014】続いて、本発明の第2の実施の形態に係る
冷延めっき鋼板の製造方法について説明する。なお、こ
の製造方法を適用する冷延めっき鋼板製造設備30は第
1の実施の形態の冷延めっき鋼板製造設備10における
リンガーロール17に代えて、第1の液切り装置の一例
であるリンガーロール32、リンガロール32の下流側
に配置される水蒸気洗浄装置31、及び水蒸気洗浄装置
31の下流側に第2の液切り装置の一例であるリンガー
ロール33を配置したものであり、その他の構成はほぼ
同一であるので、これらについては同一の符号を付し、
詳しい説明を省略する。冷延めっき鋼板製造設備30は
図7に示すように、薄肉鋼板11を処理液12に浸漬さ
せて脂分等の表面付着物を除去するためのアルカリ電解
槽等の脱脂処理槽14と、脱脂処理槽14で処理された
薄肉鋼板11を洗浄液15に浸漬させて処理液12等を
除去するための洗浄槽16と、洗浄槽16から引き上げ
られる薄肉鋼板11の液切りを行うためのリンガーロー
ル32と、リンガーロール32に続く水蒸気を薄肉鋼板
11に吹付けるための水蒸気洗浄装置31と、水蒸気洗
浄装置31から取り出される薄肉鋼板11の液切りを行
うためのリンガーロール33と、リンガーロール33で
処理された洗浄鋼板18に付着する残渣成分の量を測定
するための成分分析装置19と、洗浄鋼板18を焼鈍す
るための焼鈍炉20と、焼鈍された焼鈍鋼板21を調圧
処理し、焼鈍炉20等で生成した酸化膜を酸洗処理して
除いた後、スズあるいはクロム等でめっきされた冷延め
っき鋼板23を得るためのめっき処理装置22とを有し
ている。Next, a method of manufacturing a cold-rolled steel sheet according to a second embodiment of the present invention will be described. Note that the cold-rolled steel sheet manufacturing equipment 30 to which this manufacturing method is applied is replaced with the ringer roll 17 in the cold-rolled steel sheet manufacturing equipment 10 of the first embodiment, and is a ringer roll which is an example of a first liquid drainer. 32, a steam cleaning device 31 disposed downstream of the ringer roll 32, and a ringer roll 33, which is an example of a second liquid draining device, disposed downstream of the steam cleaning device 31. Since they are almost the same, they are denoted by the same reference numerals,
Detailed description is omitted. As shown in FIG. 7, the cold-rolled steel sheet manufacturing equipment 30 includes a degreasing treatment tank 14 such as an alkaline electrolytic tank for immersing the thin steel sheet 11 in the treatment liquid 12 to remove surface deposits such as grease, and the like. A cleaning tank 16 for immersing the thin steel sheet 11 processed in the processing tank 14 in the cleaning liquid 15 to remove the processing liquid 12 and the like, and a ringer roll 32 for draining the thin steel sheet 11 pulled up from the cleaning tank 16. And a steam washing device 31 for spraying steam following the ringer roll 32 onto the thin steel plate 11, a ringer roll 33 for draining the thin steel plate 11 taken out from the steam washing device 31, and a treatment with the ringer roll 33. Component analyzer 19 for measuring the amount of the residual component adhering to the cleaned cleaning steel sheet 18, an annealing furnace 20 for annealing the cleaning steel sheet 18, and annealed annealing steel 21 has a plating treatment device 22 for obtaining a cold-rolled steel sheet 23 plated with tin or chromium after removing the oxide film formed in the annealing furnace 20 or the like by pickling. doing.
【0015】水蒸気洗浄装置31は、例えば温度が15
0〜500℃、圧力が1〜15kg/cm2 の水蒸気を
薄肉鋼板11の表面に吹付けて、洗浄液15、あるいは
薄肉鋼板11の表面付着物を効率的に除去するための洗
浄装置である。薄肉鋼板11の単位面積当たりに吹付け
る蒸気噴霧量V(kg/m2 )は、例えば以下のように
して設定できる。まず、以下の(1)式、及び(2)式
を用いて硫酸分及び塩素分のそれぞれにおける蒸気噴霧
量Vの最小値Vs 、Vc を算出する。 Vs =Wa 2 ・Cs ・K/0.7−Wa ・(10-3g/mg)・・・(1) Vc =Wa 2 ・Cc ・K/1.4−Wa ・(10-3g/mg)・・・(2) ここで、Cs 、Cc はそれぞれ洗浄液15中の硫酸分濃
度(mg/リットル)、塩素分濃度(mg/リットル)
である。Wa はリンガーロール32又は、リンガーロー
ル33の出側における水付着量(mg/m2 )であり、
Kは単位換算係数を表し、数値定数である0.7、1.
4はそれぞれ液残り模様を発生させないための硫酸分、
塩素分の限界付着量(mg/m2 )である。そして、
(1)式、及び(2)式でそれぞれ算出されるVs 、V
c のいずれか高い方の値をVL とし、蒸気噴霧量VをV
L 以上となるような範囲に設定して薄肉鋼板11の洗浄
を行うことができる。この蒸気噴霧によって、薄肉鋼板
11の表面に付着した硫酸分及び塩素分が効率的に希
釈、除去され、薄肉鋼板11の洗浄効率を所定レベルに
維持できる。The steam cleaning device 31 has a temperature of, for example, 15
A cleaning device for spraying steam having a pressure of 0 to 500 ° C. and a pressure of 1 to 15 kg / cm 2 onto the surface of the thin steel plate 11 to efficiently remove the cleaning liquid 15 or the surface deposits on the thin steel plate 11. The amount V (kg / m 2 ) of steam sprayed per unit area of the thin steel plate 11 can be set, for example, as follows. First, the minimum values V s and V c of the steam spray amount V for the sulfuric acid component and the chlorine component are calculated using the following equations (1) and (2). V s = W a 2 · C s · K / 0.7-W a · (10 -3 g / mg) ··· (1) V c = W a 2 · C c · K / 1.4-W a · (10 −3 g / mg) (2) where C s and C c are the sulfuric acid concentration (mg / l) and the chlorine concentration (mg / l) in the washing solution 15, respectively.
It is. W a is wringer roll 32 or a water adhesion amount at the delivery side of the wringer roll 33 (mg / m 2),
K represents a unit conversion coefficient and is a numerical constant of 0.7, 1..
4 is a sulfuric acid content to prevent the formation of a liquid residue pattern,
It is the limit adhesion amount of chlorine (mg / m 2 ). And
V s and V calculated respectively by the equations (1) and (2)
The higher value of c is VL , and the vapor spray amount V is V
The thin steel plate 11 can be cleaned by setting the range to be L or more. By this steam spray, the sulfuric acid component and the chlorine component attached to the surface of the thin steel plate 11 are efficiently diluted and removed, and the cleaning efficiency of the thin steel plate 11 can be maintained at a predetermined level.
【0016】第2の実施の形態においては、前記水蒸気
洗浄装置31の下流側にリンガーロール33が設けられ
ているので、水蒸気の凝縮した付着水を薄肉鋼板11の
表面から除去して、所定の基準値以下となる硫酸分付着
量、塩素分付着量に調整された清浄な洗浄鋼板18を得
ることができる。そして、前記各付着量の調整に際して
は、洗浄液15中の硫酸イオン濃度、塩素イオン濃度、
リンガーロール32の押付圧力、薄肉鋼板11のリンガ
ーロール32への供給速度等の調整に加えて、前記水蒸
気洗浄装置31の蒸気噴霧量V、蒸気温度、蒸気圧力、
あるいはリンガーロール33の稼働条件を調整すること
で各付着量を適正範囲に制御することができる。これに
よって、美麗なめっき外観を有する飲料缶用等の冷延め
っき鋼板23を大量に、かつ効率的に製造できる。In the second embodiment, since the ringer roll 33 is provided on the downstream side of the steam cleaning device 31, the adhered water condensed with the steam is removed from the surface of the thin steel plate 11 and the predetermined water is removed. A clean washed steel plate 18 adjusted to a sulfuric acid content and a chlorine content that are equal to or less than the reference value can be obtained. Then, when adjusting the respective adhesion amounts, the sulfate ion concentration, the chloride ion concentration,
In addition to adjusting the pressing pressure of the ringer roll 32, the supply speed of the thin steel plate 11 to the ringer roll 32, etc., the steam spray amount V, steam temperature, steam pressure,
Alternatively, by adjusting the operating conditions of the ringer roll 33, each amount of adhesion can be controlled to an appropriate range. This makes it possible to efficiently and efficiently manufacture a cold-rolled plated steel sheet 23 having a beautiful plated appearance for beverage cans and the like.
【0017】以上、本発明の実施の形態を説明したが、
本発明はこれらの実施の形態に限定されるものではな
く、要旨を逸脱しない条件の変更等は全て本発明の適用
範囲である。例えば、本実施の形態においては、液切り
装置としてリンガーロールを用いる例について説明した
が、高圧空気を薄肉鋼板の表面に吹付けて除去する圧縮
空気噴出装置、あるいは真空吸引機構を有する吸液型の
リンガーロールを用いることもできる。The embodiment of the present invention has been described above.
The present invention is not limited to these embodiments, and all changes in conditions without departing from the gist are within the scope of the present invention. For example, in the present embodiment, an example in which a ringer roll is used as a liquid draining device has been described, but a compressed air jetting device that blows high-pressure air onto the surface of a thin steel plate to remove it, or a liquid absorbing type that has a vacuum suction mechanism May be used.
【0018】[0018]
【発明の効果】請求項1〜5記載の冷延めっき鋼板の製
造方法においては、洗浄鋼板に付着する硫酸分付着量及
び/又は塩素分付着量を調整して、焼鈍処理における硫
酸分及び塩素分と洗浄鋼板との反応を抑制しめっき処理
後に発生する表面欠陥を防止するので、液残り模様等の
表面欠陥の発生率を低減して、美麗な冷延めっき鋼板を
効率的に製造でき、生産歩留を向上させることができ
る。請求項2記載の冷延めっき鋼板の製造方法において
は、硫酸分付着量及び/又は塩素分付着量を、薄肉鋼板
に付着する洗浄液の液切りを行う第1の液切り装置、液
切り後に水蒸気を薄肉鋼板に吹付ける水蒸気洗浄装置、
及び水蒸気洗浄装置から取り出される薄肉鋼板の液切り
を行う第2の液切り装置を用いて調整するので、液残り
模様等の表面欠陥の発生率をさらに効果的に低減でき
る。請求項3記載の冷延めっき鋼板の製造方法において
は、洗浄鋼板の硫酸分付着量を特定値以下に制御するの
で、焼鈍過程における硫酸分と鋼板成分との反応をさら
に効果的に抑制することができる。請求項4記載の冷延
めっき鋼板の製造方法においては、洗浄鋼板の塩素分付
着量を特定値以下に制御するので、塩素分と鋼板成分と
による有害な反応物の生成を抑制して、表面欠陥の発生
率をさらに削減できる。請求項5記載の冷延めっき鋼板
の製造方法においては、冷延めっき鋼板が飲料缶用のめ
っき鋼板であるので、表面性状に対する品質規格の特に
厳しい飲料缶用のめっき鋼板における生産歩留を向上さ
せることができる。In the method for producing a cold-rolled steel sheet according to any one of claims 1 to 5, the sulfuric acid content and / or the chlorine content attached to the washed steel sheet are adjusted so that the sulfuric acid content and the chlorine content in the annealing treatment are adjusted. Since the reaction between the surface and the cleaning steel sheet is suppressed and the surface defects generated after the plating treatment are prevented, the rate of occurrence of surface defects such as a liquid residue pattern can be reduced, and a beautiful cold-rolled steel sheet can be efficiently manufactured. The production yield can be improved. In the method for producing a cold-rolled plated steel sheet according to claim 2, a first draining device for draining a cleaning liquid that adheres to a thin steel plate, the amount of sulfuric acid and / or the amount of chlorine attached, and steam after draining. Steam cleaning equipment that sprays
In addition, since the adjustment is performed using the second liquid removal device that performs liquid removal of the thin steel plate taken out from the steam cleaning device, the incidence of surface defects such as liquid residue patterns can be further effectively reduced. In the method for manufacturing a cold-rolled steel sheet according to claim 3, the sulfuric acid content of the washed steel sheet is controlled to a specific value or less, so that the reaction between the sulfuric acid content and the steel sheet component in the annealing process is further effectively suppressed. Can be. In the method for producing a cold-rolled plated steel sheet according to claim 4, since the amount of chlorine attached to the washed steel sheet is controlled to a specific value or less, generation of harmful reactants due to chlorine and steel sheet components is suppressed, and The incidence of defects can be further reduced. In the method for producing a cold-rolled plated steel sheet according to the fifth aspect, since the cold-rolled plated steel sheet is a plated steel sheet for a beverage can, the production yield of the plated steel sheet for a beverage can with particularly strict quality standards for surface properties is improved. Can be done.
【図1】本発明の第1の実施の形態に係る冷延めっき鋼
板の製造方法を適用した冷延めっき鋼板製造設備の説明
図である。FIG. 1 is an explanatory diagram of a cold-rolled plated steel sheet manufacturing equipment to which a method for manufacturing a cold-rolled plated steel sheet according to a first embodiment of the present invention is applied.
【図2】液残り模様発生評価と硫酸分付着量との関係を
示す図である。FIG. 2 is a diagram showing the relationship between the evaluation of occurrence of a liquid residue pattern and the amount of sulfuric acid attached.
【図3】液残り模様発生評価と塩素分付着量との関係を
示す図である。FIG. 3 is a diagram showing the relationship between the evaluation of the occurrence of a liquid residue pattern and the amount of adhered chlorine.
【図4】液残り模様発生評価とナトリウム分付着量との
関係を示す図である。FIG. 4 is a diagram showing the relationship between the evaluation of the occurrence of a residual liquid pattern and the amount of sodium content.
【図5】液残り模様発生評価とカルシウム分付着量との
関係を示す図である。FIG. 5 is a diagram showing the relationship between the evaluation of the occurrence of a liquid remaining pattern and the amount of adhered calcium.
【図6】液残り模様発生評価と水酸分付着量との関係を
示す図である。FIG. 6 is a diagram showing the relationship between the evaluation of the occurrence of a liquid residue pattern and the amount of attached hydroxyl components.
【図7】本発明の第2の実施の形態に係る冷延めっき鋼
板の製造方法を適用した冷延めっき鋼板製造設備の説明
図である。FIG. 7 is an explanatory view of a cold-rolled plated steel sheet manufacturing equipment to which a method for manufacturing a cold-rolled plated steel sheet according to a second embodiment of the present invention is applied.
10 冷延めっき鋼板製造設備 11 薄肉鋼板 12 脱脂液(処理液) 13 浸漬ロー
ル 14 脱脂処理槽 15 洗浄液 16 洗浄槽 17 リンガーロール(液切り装置) 18 洗浄鋼板 19 成分分析装置 20 焼鈍炉 21 焼鈍鋼板 22 めっき処
理装置 23 冷延めっき鋼板 30 冷延めっ
き鋼板製造設備 31 水蒸気洗浄装置 32 リンガーロール(第1の液切り装置) 33 リンガーロール(第2の液切り装置)Reference Signs List 10 Cold rolled plated steel sheet manufacturing equipment 11 Thin-walled steel sheet 12 Degreasing liquid (treatment liquid) 13 Dipping roll 14 Degreasing treatment tank 15 Cleaning liquid 16 Cleaning tank 17 Ringer roll (liquid removing device) 18 Cleaning steel sheet 19 Component analyzer 20 Annealing furnace 21 Annealing steel sheet 22 Plating Equipment 23 Cold Rolled Coated Steel Sheet 30 Cold Rolled Coated Steel Sheet Manufacturing Equipment 31 Steam Cleaning Device 32 Ringer Roll (First Drainer) 33 Ringer Roll (Second Drainer)
Claims (5)
に浸漬して表面付着物を除去した後、洗浄液に浸漬し
て、これを洗浄鋼板として、次に該洗浄鋼板を焼鈍処理
し、スズ、クロム等のめっき処理を施す冷延めっき鋼板
の製造方法において、 前記洗浄鋼板に付着する硫酸分付着量及び/又は塩素分
付着量を調整して、前記焼鈍処理における硫酸分及び塩
素分と前記洗浄鋼板との反応を抑制し前記めっき処理後
に発生する表面欠陥を防止することを特徴とする冷延め
っき鋼板の製造方法。1. A thin steel sheet obtained by cold rolling is immersed in a treatment liquid to remove surface deposits, then immersed in a cleaning liquid, and this is used as a cleaning steel sheet. , Tin, chromium, etc., in a method for producing a cold-rolled plated steel sheet, wherein the sulfuric acid content and / or the chlorine content attached to the washed steel sheet are adjusted to adjust the sulfuric acid content and the chlorine content in the annealing treatment. And suppressing a reaction between the steel sheet and the washed steel sheet to prevent a surface defect occurring after the plating treatment.
付着量を、前記薄肉鋼板に付着する前記洗浄液の液切り
を行う第1の液切り装置、液切り後に水蒸気を該薄肉鋼
板に吹付ける水蒸気洗浄装置、及び該水蒸気洗浄装置か
ら取り出される該薄肉鋼板の液切りを行う第2の液切り
装置を用いて調整することを特徴とする請求項1記載の
冷延めっき鋼板の製造方法。2. A first draining device for draining the cleaning liquid adhering to the thin steel plate, wherein the sulfuric acid deposit amount and / or the chlorine deposit amount is blown to the thin steel plate after draining. The method for producing a cold-rolled plated steel sheet according to claim 1, wherein the adjustment is performed using a steam cleaning device to be attached and a second liquid draining device that drains the thin steel sheet taken out from the steam cleaning device.
g/m2 以下に制御することを特徴とする請求項1又は
2記載の冷延めっき鋼板の製造方法。3. The cleaning steel sheet has a sulfuric acid content of 0.7 m.
The method for producing a cold-rolled plated steel sheet according to claim 1, wherein the method is controlled to be not more than g / m 2 .
g/m2 以下に制御することを特徴とする請求項1〜3
のいずれか1項に記載の冷延めっき鋼板の製造方法。4. The cleaning steel sheet has a chlorine adhesion amount of 1.4 m.
g / m < 2 > or less.
The method for producing a cold-rolled plated steel sheet according to any one of the above.
鋼板であることを特徴とする請求項1〜4のいずれか1
項に記載の冷延めっき鋼板の製造方法。5. The steel sheet according to claim 1, wherein the cold-rolled steel sheet is a steel sheet for beverage cans.
The method for producing a cold-rolled plated steel sheet according to the above item.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14713297A JPH10317180A (en) | 1997-05-20 | 1997-05-20 | Production of cold rolled and plated steel sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14713297A JPH10317180A (en) | 1997-05-20 | 1997-05-20 | Production of cold rolled and plated steel sheet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10317180A true JPH10317180A (en) | 1998-12-02 |
Family
ID=15423294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14713297A Withdrawn JPH10317180A (en) | 1997-05-20 | 1997-05-20 | Production of cold rolled and plated steel sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10317180A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006348377A (en) * | 2005-06-20 | 2006-12-28 | Nippon Steel Corp | Production method of surface treated steel sheet having excellent appearance and its apparatus |
-
1997
- 1997-05-20 JP JP14713297A patent/JPH10317180A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006348377A (en) * | 2005-06-20 | 2006-12-28 | Nippon Steel Corp | Production method of surface treated steel sheet having excellent appearance and its apparatus |
JP4523878B2 (en) * | 2005-06-20 | 2010-08-11 | 新日本製鐵株式会社 | Method and apparatus for producing surface-treated steel sheet with excellent appearance |
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