JPS59197553A - Preparation of hot-dip zinc plated steel plate having smooth surface - Google Patents
Preparation of hot-dip zinc plated steel plate having smooth surfaceInfo
- Publication number
- JPS59197553A JPS59197553A JP58071447A JP7144783A JPS59197553A JP S59197553 A JPS59197553 A JP S59197553A JP 58071447 A JP58071447 A JP 58071447A JP 7144783 A JP7144783 A JP 7144783A JP S59197553 A JPS59197553 A JP S59197553A
- Authority
- JP
- Japan
- Prior art keywords
- hot
- steel plate
- dip zinc
- steel strip
- dip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title abstract description 21
- 239000011701 zinc Substances 0.000 title abstract description 21
- 229910052725 zinc Inorganic materials 0.000 title abstract description 21
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 11
- 239000008397 galvanized steel Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 238000005246 galvanizing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000007747 plating Methods 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 7
- 239000004677 Nylon Substances 0.000 abstract description 6
- 229920001778 nylon Polymers 0.000 abstract description 6
- 238000005238 degreasing Methods 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 210000004894 snout Anatomy 0.000 abstract description 4
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 abstract description 2
- 239000013040 bath agent Substances 0.000 abstract 1
- 239000013043 chemical agent Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 239000013078 crystal Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000006061 abrasive grain Substances 0.000 description 4
- 230000001680 brushing effect Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
- C23C2/004—Snouts
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、表面が平滑な溶融亜鉛めっき鋼板の製造方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a hot-dip galvanized steel sheet having a smooth surface.
溶融亜鉛めっき鋼板の表面にはスパングルと呼ばれる模
様がついている。この模様は、溶融亜鉛が鋼板上で冷却
され固体の金属亜鉛の結晶組織構ｌ造となシ、１つの核
を中心として成長を続け、隣の同様に成長を続けている
結晶と接触しことに結晶粒界が発生して生ずるものであ
り、いわゆるスパングル模様がめつき鋼板表面に表われ
る。この時溶融亜鉛が固体の亜鉛となシ、さらにそれが
冷却されるから７つの結晶内では収縮する力が働き、当
然粒界で接する２つの結晶のそれぞれの収縮によシ粒界
は凹みやすくな９、特にスパングルが大きければ大きい
ほどこの傾向は大きくなりゃすい。The surface of hot-dip galvanized steel sheets has a pattern called a spangle. This pattern occurs when molten zinc is cooled on a steel plate and forms the crystalline structure of solid metallic zinc, which continues to grow around one nucleus and comes into contact with neighboring crystals that continue to grow as well. This is caused by the generation of grain boundaries, and a so-called spangled pattern appears on the surface of the plated steel sheet. At this time, the molten zinc becomes solid zinc, and as it is further cooled, a shrinking force acts within the seven crystals, and naturally the grain boundaries tend to dent due to the contraction of each of the two crystals that touch at the grain boundaries. (9) In particular, the larger the spangle, the greater this tendency becomes.
近年、このスパングルの粒界に発生する四部が問題とな
ってきておシ、ノースパングル表面とかミニスパングル
表面あるいはスパングル間に凹部の粒界のない表面をも
った溶融亜鉛めっき鋼板が求められるに至っている。In recent years, the problems that occur at the grain boundaries of spangles have become a problem, and hot-dip galvanized steel sheets with no-spangle surfaces, mini-spangle surfaces, or surfaces with no concave grain boundaries between spangles are now in demand. There is.
ミニマムスパングル化する技術としてはＰｂ成分を下げ
るとか、亜鉛が凝固する直前に薬剤を噴務するとかの方
法が知られている。しかしながら亜鉛洛中のＰｂ濃度を
下げる方法によれば、スパングルのある表面を生産した
あとミニマムスパングルを生産するまでに中間的なスパ
ングルが発生するといつ欠点がある。一方、薬剤を噴霧
する方法によれば設備費や薬剤費が高額なものとなると
いう欠点がある。Techniques for creating minimum spangles include lowering the Pb content and spraying chemicals just before the zinc solidifies. However, the method of reducing the Pb concentration in zinc oxide has a drawback when intermediate spangles occur after producing a surface with spangles and before producing minimum spangles. On the other hand, the method of spraying a chemical has the drawback that the equipment and chemical costs are high.
本発明は、従来の溶融亜鉛めっき鋼板の表面に発生する
スパングルに起因する欠点ならびにこの欠点除去のため
の諸対策に随伴する欠点を回避する製造方法を提供する
ことを目的とするものであって、特許請求の範囲記載の
方法を提供することにより前記目的を達成することがで
きる。An object of the present invention is to provide a manufacturing method that avoids the defects caused by spangles that occur on the surface of conventional hot-dip galvanized steel sheets, as well as the defects associated with various measures for removing these defects. , the above object can be achieved by providing the method described in the claims.
ところで従来の溶融亜鉛めっきラインは第１図に示す如
くである。鋼帯はペイオフリール３よシ送りだされ、ウ
エルグーＳで溶接され連続化される。この連続鋼帯／は
トリマークによ９両エツジを切除されたのち、入側のル
ーバータに導かれる。By the way, a conventional hot-dip galvanizing line is as shown in FIG. The steel strip is sent out from the payoff reel 3 and welded by Welgoo S to make it continuous. After nine edges of this continuous steel strip are cut off by trim marks, it is guided to the louverter on the entry side.
この入側のルーパーワは銅帯をウェルズ−５によ多連続
化する時入側の送シを一時停止するに当って以降の諸設
備を通る連続した鋼帯／の送行を保つためのものである
。前記ルーパー９を出た連続した銅帯／は、アルカリ溶
液が入っている脱脂タンク／／と７３と、ブラシ材料が
ナイロン、合成繊維等の柔かなブラシロールＢ；、／７
とよりなるクリーニングセクションを通って連続焼鈍炉
／ｑに導かれ還元雰囲気中で連続的に加熱・冷却された
のち大気雰囲気にふれることなくスナウト２ノを経て亜
鉛浴槽２３に導かれて溶融亜鉛めっき鋼帯、２５となシ
、続くガスワイパー、２７によシめつき鋼帯、２５上の
余分の亜鉛が除去される。This looper on the entry side is used to maintain the continuous feeding of the steel strip through the subsequent equipment when temporarily stopping the feed on the entry side when the copper strip is continuously transferred to Well-5. be. The continuous copper band / coming out of the looper 9 is connected to a degreasing tank // and 73 containing an alkaline solution, and a soft brush roll B made of nylon, synthetic fiber, etc.
After passing through a cleaning section consisting of a cleaning section and leading to a continuous annealing furnace/q, where it is continuously heated and cooled in a reducing atmosphere, it is led through a snout 2 and into a zinc bath 23 without coming into contact with the atmosphere, where it is hot-dip galvanized. The steel strip, 25, is followed by a gas wiper, 27, and the excess zinc on the galvanized steel strip, 25, is removed.
次に不発明の詳細な説明する。Next, the non-invention will be explained in detail.
本発明者らは前記スパングルに関して検討を進め、スパ
ングルを小さくするには溶融亜鉛が凝固を始める時に数
多くの結晶が同時に成長し始めるようにすればよく、一
般に結晶は核を中心に成長を始めるので、凝固する直前
に薬液をスプレーするなりして結晶核を均一に多量に分
布させる必要がある。本発明は、その代りに鋼板表向に
数多くの微細なスクラッチ疵をつけれは、疵の頂部が核
になり、これによりスパングルは小さくなるのではない
かと想到し、実験を積ねた。The present inventors have conducted studies regarding the spangles, and found that in order to reduce the spangles, it is sufficient to make many crystals start to grow at the same time when molten zinc begins to solidify. It is necessary to uniformly distribute a large amount of crystal nuclei by spraying a chemical solution just before solidification. In the present invention, we conducted experiments based on the idea that, instead, by creating many fine scratches on the surface of a steel sheet, the tops of the scratches would become cores, thereby reducing the spangles.
本発明者らは安価な設備費でスパングルを小形化するた
め連続溶融亜鉛めっきラインのクリーニングセクション
のブラシロールのブラシの材質を選択して、鋼板が亜鉛
浴に浸漬されるできるだけ直前に、研摩することによっ
て表面の酸化膜を取シ除いた鋭利な頂部を有する表面状
態すなわち活性化された表面状態にして、めっき金属の
結晶が鋼板面のいたる所で発生しスパングルを小さくす
る働きを促進させることによシ、本発明を完成した。In order to reduce the size of the spangles with low equipment costs, the present inventors selected the material of the brushes of the brush roll in the cleaning section of the continuous hot-dip galvanizing line, and polished them as soon as possible before the steel plate was immersed in the zinc bath. By removing the oxide film on the surface, the surface has a sharp top, that is, it becomes an activated surface state, and crystals of the plated metal are generated all over the steel sheet surface, promoting the effect of reducing spangles. Finally, the present invention has been completed.
次に、本発明を図面について詳細に説明する。The invention will now be explained in detail with reference to the drawings.
第２図は本発明による連続溶融亜鉛めっきライン中のク
リーニングセクションの側面図である。FIG. 2 is a side view of a cleaning section in a continuous hot dip galvanizing line according to the present invention.
本発明によれば、アルミナ、カーボランダム、シリカ等
よシなる砥粒を含んだナイロン製のブラシロール、また
は同じくアルミナ、カーボランダム等よシなる砥粒を含
んだスコッチ織布よシなるスコッチロール（商品名、住
友スリーエム株式会社製）、あるいは弾性砥石ロール、
スコッチブライドロール瞥たはベルトサングーを用いて
脱月旨洗浄後に鍬板面の全域にわたって微細な疵を与え
、そのまま焼鈍し、次いでスナウトを経て溶融亜鉛浴に
浸漬し、溶融亜鉛浴を出ためっき鋼板のめ付量をガスワ
イピングで調整するようにして溶融亜鉛めっき鋼板の製
造方法を構成したものである。According to the invention, a brush roll made of nylon containing abrasive grains such as alumina, carborundum, silica, etc. or a Scotch roll made of woven Scotch cloth also containing abrasive grains such as alumina, carborundum, etc. (product name, manufactured by Sumitomo 3M Ltd.), or elastic whetstone roll,
After cleaning with a Scotch bride roll or a belt cleaner, fine scratches were created over the entire surface of the hoe board, annealed as it was, then passed through a snout, immersed in a molten zinc bath, and then exited the molten zinc bath. The method for manufacturing a hot-dip galvanized steel sheet is configured such that the amount of plating on the galvanized steel sheet is adjusted by gas wiping.
従来のめつきラインのように単にナイロンブラシでブラ
ッシングした時は鋼板表面は灰色の金属色でブラシが当
った跡が僅かに読みとれる程度であるが、本発明につい
ての砥粒入シブラシでブラッシングした時の原板表面は
明らかに研摩されており、その時生じるスクラッチ疵の
ため原板表面は光沢が変わり、散乱光が増し、白銀色に
輝き、スクラッチ疵の跡も充分目視で確められる程度に
なる。When simply brushing with a nylon brush as with conventional plating lines, the surface of the steel plate is a gray metallic color with only slight traces of brush contact, but when brushed with the abrasive brush of the present invention, The surface of the original plate is clearly polished, and due to the scratches that occur at that time, the gloss of the original plate surface changes, the amount of scattered light increases, it shines silvery white, and the traces of the scratches are visible to the naked eye.
次に、本発明を実施例について説明する。Next, the present invention will be described with reference to examples.
実施例
実際の連続溶融亜鉛めっきラインで工業的規模の実験を
行った。その時のブラッシングの条件と効果を第１表に
１とめる。めっき原板の板厚は／、０關、幅は９７０間
、めっきライン速度はｘｏｍｐｍ亜鉛のめ付量は両面で
コク左り７ｍ２である。浴温は”ＩＡＯＣであった。ナ
イロンブラシロール及ヒスコツチロールの砥粒はコグｏ
メツシュのアルミナ（Ａｔｚ０３）またはシリカ（Ｓｉ
０２）であった。EXAMPLE An industrial-scale experiment was conducted on an actual continuous hot-dip galvanizing line. The conditions and effects of brushing at that time are listed in Table 1. The thickness of the original plated plate is /, 0 mm, the width is 970 mm, the plating line speed is xompm, and the amount of zinc plated on both sides is 7 m2 on the left side. The bath temperature was ``IAOC.'' The abrasive grains of nylon brush roll and hiscotyol were
Metsch's alumina (Atz03) or silica (Si)
02).
第１表中、ブラシロール中の２ｑ〜３ｓの符号は第２図
中のブラシロールの番号を示す。Ｃ方向。In Table 1, the numbers 2q to 3s in the brush rolls indicate the numbers of the brush rolls in FIG. C direction.
Ｈａ・ＰＰＩの欄は表面のあらさに関するもので、それ
ぞれの略符号がもつ意味は次の如くである。The Ha/PPI column relates to surface roughness, and the meanings of the respective abbreviations are as follows.
Ｃ方向 冷間圧延された銅帯の巾方向へ粗度計を移動
して測定する。C direction: Measure by moving the roughness meter in the width direction of the cold rolled copper strip.
Ｈａ 平均あらさ
あらさ曲線の平均の方向にＸ軸をと９、それと直角にｙ
軸を取ってあらさ曲線をｙ ＝ ｆ （ｘ）であられし
たとき、山と谷を相埋めてできる平均線をｙ＝ｈ１とす
ると
ｈｌ −（、、／’、” ｆ（”） ｄｘＨａ ＝去７
．” Ｉ ｆ（ｘ）−ｈｌ １ ”Ｐ、Ｐ、Ｉ ピー
クパーインチ
例えばＰ、Ｐ、Ｉ （３０ｐ １ｎｃｈ） −／ｌｌ！
ｒ とは１吋の長さの中に５０μ１ｎｃｈ のピーク
高さを超えるピークが／’Ｉ！ｉ個あることを示す。Ha Average roughness The X axis is in the direction of the average roughness curve, and the y axis is perpendicular to it.
When we take the axis and draw the roughness curve as y = f (x), if the average line created by filling in the peaks and valleys is y = h1, then hl - (,, /', " f (") dxHa = 7
．． "I f(x) - hl 1 "P, P, I Peak per inch For example, P, P, I (30p 1nch) -/ll!
r means that there is a peak with a peak height of over 50 μ1 inch within a length of 1 inch /'I! Indicates that there are i pieces.
第 ７ 表
第１表で示した如く、通常のナイロンブラシでブラッシ
ングした時はスパングルの平均粒径は１０隨以上になる
が、砥粒を入れたブラシで研摩するとスパングルの平均
粒径は７順以下、小さいものではダ關程度になる。めっ
き原板の表面あらさ「Ｃ方向Ｈａ Ｊの実測値とスパン
グルの平均粒径との量的な相関関係をグラフ等で示すこ
とは難しい。表面に細い凸部が数多くあればある程スパ
ングル径は小さくなると定性的には述べられるが、凸部
の数とスパングル径との量的な関係の把握は難しい。第
１表の試験番号／でＰＰＩが７ｇであるにも拘らずスパ
ングル径は／Ｑｔｕｎとなっており、あらさの頂ｉ１５
が必ずしも核とはならない小（むしろ核とならない方が
桁外れに多い）がわかった。Table 7 As shown in Table 1, when brushing with a normal nylon brush, the average particle size of the spangles is 10 or more, but when brushed with a brush containing abrasive grains, the average particle size of the spangles is in the order of 7. The following small items are only a matter of time. It is difficult to show the quantitative correlation between the measured value of the surface roughness of the plating base plate in the C direction Ha J and the average grain size of the spangles using graphs, etc. The more thin convexities there are on the surface, the smaller the spangle diameter. Although it can be said qualitatively, it is difficult to grasp the quantitative relationship between the number of convex parts and the spangle diameter.In Table 1, test number / has a PPI of 7g, but the spangle diameter is /Qtun. It is rough top i15
It turns out that there are a lot of small cases that do not necessarily constitute a core (in fact, there are an extremely large number of cases where they do not become a core).
しかし原板面にスクラッチ疵を与えた方がスパングルを
小さくできることを立証できた。ＰＰＩ値を規定すると
ともに原板が溶融亜鉛浴に浸漬されるできるだけ直前に
研摩することによって表面を活性化された表面状態にす
ることの方がスパングルを小さくするのに重要な要因と
言うことができる。However, we were able to prove that spangles can be reduced by creating scratches on the original surface. In addition to specifying the PPI value, it can be said that the important factors for reducing spangles are to polish the original plate as soon as possible before it is immersed in the molten zinc bath to bring the surface into an activated surface state. .
なお、めっき後の亜鉛めっき鋼板の表面状態はブラッシ
ングによるスクラッチ疵の影響は全くなく、スパングル
粒界の凹部が少くなシ、表面が平滑なめつき鋼板が得ら
れたことは言うまでもない。It goes without saying that the surface condition of the galvanized steel sheet after plating was not affected by scratches caused by brushing at all, and that a plated steel sheet with a smooth surface was obtained with fewer concave portions at spangled grain boundaries.
本発明方法によると、亜鉛浴調整を行うこともなく、薬
剤咬霧設備を使う必要もなく、ブラシロールによシ鏑板
表面全域に微細なスクラッチ疵をつけるだけで銅板表面
の活性が増加し、スパングルが小さくな９、平滑な表面
をもった溶融亜鉛めっき銅板を得ることができる。According to the method of the present invention, there is no need to adjust the zinc bath, there is no need to use chemical spraying equipment, and the activity of the copper plate surface can be increased by simply creating fine scratches on the entire surface of the copper plate using a brush roll. , a hot-dip galvanized copper plate with small spangles and a smooth surface can be obtained.
第１図は従来の連続溶融亜鉛めっきラインの側面図、第
２図は本発明が関連する連続浴融亜鉛めっきライン中の
脱脂タンク、ブラシロールによ多構成されたクリーニン
グセクションの側面図である。
／・・・銅帯、３・・・ペイオフリール、Ｓ・・・ウエ
ルダー、７・・・トリマー、り・・・ルーバ＋、 ／
／、／、７・・・脱脂タンク、１５．ｌり・・・ブラシ
ロール、１９・・・連続焼鈍炉、２／・・・スナウト、
コ３・・・亜鉛浴槽、コＳ・・・めっきされた銅帯、２
７−・・ガスワイパー、２９．３／、３３．３！； ・
・・ブラシロール。
特許出願人 川崎製鉄株式会社
代 理 人 弁理士 村 １）政 治FIG. 1 is a side view of a conventional continuous hot-dip galvanizing line, and FIG. 2 is a side view of a cleaning section that includes a degreasing tank and a brush roll in the continuous bath galvanizing line to which the present invention relates. . /...Copper band, 3...Payoff reel, S...Welder, 7...Trimmer, Ri...Louva+, /
/, /, 7... Degreasing tank, 15. luri...brush roll, 19...continuous annealing furnace, 2/...snout,
C3... Zinc bathtub, C S... Plated copper strip, 2
7-...Gas wiper, 29.3/, 33.3! ; ・
...Brush roll. Patent applicant Kawasaki Steel Co., Ltd. Agent Patent attorney Mura 1) Politics
Claims (1)
鋼板の表面全域に微細なスクラッチ疵をつけた後、前記
鋼板を焼鈍し、次に溶融亜鉛めっきを施すことを特徴と
する表面が平滑な溶融亜鉛めっき鋼板の製造方法。 ２、特許請求の範囲第７項記載の方法において、前記微
細なスクラッチ疵が平均粗度Ｒａ〉ｏ、、２μｍ、Ｃ方
向で測定して／ １ｎｃｈの長さの中に５０μ１ｎｃｈ
以上のピーク高さがＲ以下であることを特徴とする表面
が平滑な溶融亜鉛めっき鋼板の製造方法。[Claims] 1. A method for manufacturing a hot-dip galvanized steel sheet, characterized in that after fine scratches are formed on the entire surface of a steel sheet to be plated, the steel sheet is annealed, and then hot-dip galvanizing is applied. A method for producing hot-dip galvanized steel sheets with a smooth surface. 2. In the method according to claim 7, the fine scratches have an average roughness Ra〉o, 2 μm, measured in the C direction/50 μ1 nch in a 1 nch length.
A method for producing a hot-dip galvanized steel sheet with a smooth surface, characterized in that the above peak height is R or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58071447A JPS59197553A (en) | 1983-04-25 | 1983-04-25 | Preparation of hot-dip zinc plated steel plate having smooth surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58071447A JPS59197553A (en) | 1983-04-25 | 1983-04-25 | Preparation of hot-dip zinc plated steel plate having smooth surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59197553A true JPS59197553A (en) | 1984-11-09 |
Family
ID=13460811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58071447A Pending JPS59197553A (en) | 1983-04-25 | 1983-04-25 | Preparation of hot-dip zinc plated steel plate having smooth surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59197553A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100985349B1 (en) * | 2008-07-04 | 2010-10-04 | 주식회사 포스코 | Continuous Hot-dip Coating Line and Method for Continuous Hot-dip Coating Steel Strip |
| KR101322138B1 (en) * | 2009-12-16 | 2013-10-28 | 주식회사 포스코 | Facility for Manufacturing Steel Strip and Method for Manufacturing Steel Strip Using the Facility |
-
1983
- 1983-04-25 JP JP58071447A patent/JPS59197553A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100985349B1 (en) * | 2008-07-04 | 2010-10-04 | 주식회사 포스코 | Continuous Hot-dip Coating Line and Method for Continuous Hot-dip Coating Steel Strip |
| KR101322138B1 (en) * | 2009-12-16 | 2013-10-28 | 주식회사 포스코 | Facility for Manufacturing Steel Strip and Method for Manufacturing Steel Strip Using the Facility |
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