JPH03150338A - Production of continuous alloying hot dip galvanized steel sheet - Google Patents
Production of continuous alloying hot dip galvanized steel sheetInfo
- Publication number
- JPH03150338A JPH03150338A JP28777989A JP28777989A JPH03150338A JP H03150338 A JPH03150338 A JP H03150338A JP 28777989 A JP28777989 A JP 28777989A JP 28777989 A JP28777989 A JP 28777989A JP H03150338 A JPH03150338 A JP H03150338A
- Authority
- JP
- Japan
- Prior art keywords
- bath
- steel sheet
- dross
- galvanized steel
- snout
- 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
- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 37
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000005275 alloying Methods 0.000 title abstract description 11
- 210000004894 snout Anatomy 0.000 claims abstract description 38
- 238000007747 plating Methods 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000011701 zinc Substances 0.000 claims abstract description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 28
- 229910052782 aluminium Inorganic materials 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 229910007570 Zn-Al Inorganic materials 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- FJMNNXLGOUYVHO-UHFFFAOYSA-N aluminum zinc Chemical compound [Al].[Zn] FJMNNXLGOUYVHO-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、溶融合金化亜鉛メッキ鋼板の製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing a molten alloyed galvanized steel sheet.
（従来技術と発明が解決しようとする課題）連続溶融亜
鉛メッキ方法においては、一般に同−般備で溶融亜鉛メ
ッキ後のメッキ鋼板を加熱処理してメッキ層へ鋼板の鉄
を熱拡散により合金化処理する、溶融合金化亜鉛メッキ
鋼板の製造と、溶融亜鉛メッキ後メツキ鋼板を加熱処理
することなく製品とする。溶融亜鉛メッキ鋼板の製造が
なさ九るのが通例である。(Prior art and problem to be solved by the invention) In the continuous hot-dip galvanizing method, generally the plated steel sheet after hot-dip galvanizing is heat-treated using the same general equipment, and the iron of the steel sheet is alloyed by thermal diffusion into the plating layer. To manufacture a hot-dip galvanized galvanized steel sheet, and to produce a galvanized steel sheet after hot-dip galvanization into a product without heat treatment. It is customary that hot-dip galvanized steel sheets are not manufactured.
上記合金化亜鉛メッキ鋼板の製造においては、メッキ鋼
板の加熱処理に際し、鉄の熱拡散を阻害するメッキ層中
のアルミニウムを少なくするため、メッキ洛中のアルミ
ニウム量を減少させ、逆に合金化処理しない溶融亜鉛メ
ッキ鋼板の製造においては、メッキ表面の光沢性、加工
性等の点から合金化溶融亜鉛メッキ鋼板製造に比べ浴中
のアルミニウムを増加させるものである。In manufacturing the above-mentioned alloyed galvanized steel sheets, when heat treating the plated steel sheets, in order to reduce the amount of aluminum in the plating layer that inhibits the thermal diffusion of iron, the amount of aluminum in the plating layer is reduced, and conversely, the alloying treatment is not performed. In the production of hot-dip galvanized steel sheets, the amount of aluminum in the bath is increased compared to the production of alloyed hot-dip galvanized steel sheets from the viewpoint of the glossiness of the plated surface, workability, etc.
このようにして造り分けするものであるが、浴中のアル
ミニウムを減少したにもか工わらず溶融合金化亜鉛メッ
キ鋼板の製造に際し、メッキ層中、特に鋼板とメッキ層
の境界に多量のアルミニウムが存在し合金化処理が困難
になる等の欠点をともなうものである。Although the aluminum content in the bath has been reduced, a large amount of aluminum remains in the plating layer, especially at the boundary between the steel sheet and the plating layer, during the production of molten galvanized steel sheets. This is accompanied by drawbacks such as the presence of oxidants, which makes alloying treatment difficult.
（課題を解決するための手段）
本発明の特徴とするところは、溶融亜鉛メッキ鋼板製造
から溶融合金化亜鉛メッキ鋼板製造に移行するに際し、
スナウト内浴表面のドロスを除去し、スナウト内浴表面
部のアルミニウム濃度を低下せしめ、鋼板とメッキ層の
境界面に高濃度アルミニウム含有亜鉛層の生成を抑制し
つつ、メッキすることを特徴とする、溶融合金化亜鉛メ
ッキ鋼板の製造方法に関するものである。(Means for Solving the Problems) A feature of the present invention is that when transitioning from hot-dip galvanized steel plate production to melt-alloyed galvanized steel plate production,
It is characterized by removing dross on the surface of the snout inner bath, lowering the aluminum concentration on the surface of the snout inner bath, and performing plating while suppressing the formation of a high concentration aluminum-containing zinc layer on the interface between the steel plate and the plating layer. , relates to a method for manufacturing a molten alloyed galvanized steel sheet.
しかして本発明者等が種々調査した結果表記のごとき事
実が判明した。However, as a result of various investigations conducted by the present inventors, the facts as described have been found.
即ち、溶融亜鉛メッキ鋼板の製造においては、鋼板（帯
）がメッキ浴中へ導入されると、鋼板（帯）の鉄が溶出
し−Ｚｎ−Ｆｅ系ドロスが発生し、このドロスは沈澱し
、メッキ浴底部に堆積する。That is, in the production of hot-dip galvanized steel sheets, when a steel sheet (strip) is introduced into a plating bath, the iron in the steel sheet (strip) is eluted, producing -Zn-Fe-based dross, and this dross precipitates. Deposits at the bottom of the plating bath.
一方、浴中のアルミニウムと合金化されＺｎ−Ｆａ−Ａ
ｌｌとなったドロスは浴表面に浮遊する、この浮遊ドロ
スがメッキ浴表面全体に発生するが。On the other hand, Zn-Fa-A is alloyed with aluminum in the bath.
The dross that has become a plating bath floats on the surface of the bath, and this floating dross is generated over the entire surface of the plating bath.
スナウト内に発生（浮遊）したドロスはスナウト外へ排
出さ九ることなく蓄積さ九る一方でメッキ浴表面部のア
ルミニウム濃度を高めることが明らかになった。It has become clear that the dross generated (floating) inside the snout accumulates without being discharged outside the snout, while increasing the aluminum concentration on the surface of the plating bath.
このようなことから、ｌｌＩ板（帯）をスナウトを介し
てメッキ浴へ導入するとき、最初に高濃度アルミニウム
浴（浴）と接触し、次いで所定の浴組成域へ移動し、高
濃度アルミニウム含有亜鉛メッキ層上に所定のアルミニ
ウムー亜鉛組成のメッキがなされ、メッキ付着量制御後
、加熱処理して合金化処理する際に、下地の高濃度アル
ミニウム含有亜鉛メッキ層のアルミニウムが鉄の熱拡散
を阻害し、十分な合金層の生成ができないことになる。For this reason, when the III plate (strip) is introduced into the plating bath through the snout, it first comes into contact with the high concentration aluminum bath (bath), then moves to a predetermined bath composition area, and then moves to a predetermined bath composition area, and then moves to a high concentration aluminum bath. Plating with a predetermined aluminum-zinc composition is applied to the galvanized layer, and after controlling the amount of plating deposited, when it is heat-treated and alloyed, the aluminum in the underlying galvanized layer containing high concentration aluminum prevents the thermal diffusion of iron. This prevents the formation of a sufficient alloy layer.
特に溶融亜鉛メッキ鋼板製造においては高濃度アルミニ
ウム浴にしており、ドロスによる浴表面部は一層高濃度
アルミニウム搭載となっており、これから溶融合金化亜
鉛メッキ鋼板製造に切替えると、上記のごとき難点が顕
著になる。In particular, in the production of hot-dip galvanized steel sheets, a high-concentration aluminum bath is used, and the surface of the bath due to dross is loaded with even higher concentration of aluminum.If we switch to production of hot-dip galvanized steel sheets from now on, the above-mentioned difficulties will be noticeable. become.
そこで本発明においては、溶融亜鉛メッキ鋼板製造から
溶融合金化亜鉛メッキ鋼板の製造に切替えるとき、スナ
ウト内浴表面に浮遊するドロスをほとんど除去する。例
えば、スナウト内浴表面部とスナウト外浴へ連通するバ
イブを配置し、ポンプ等の排出装置によりスナウト外へ
排出する。スナウト外へのドロスの排出は浴内で、しか
も下向きに排出することにより、ドロスは浮上するが、
浴流れは、下向に流れ、浴底部に堆積しているＺｎ−Ｆ
ｅ系のドロスに接触し、浴中のＡｌｌと反応し、Ｚｎ−
Ｆｅ−Ａｌｌ 系ドロスとなり、浮上し。Therefore, in the present invention, when switching from manufacturing hot-dip galvanized steel sheets to manufacturing hot-alloyed galvanized steel sheets, most of the dross floating on the surface of the bath inside the snout is removed. For example, a vibrator is placed that communicates with the surface of the inner bath of the snout and the outer bath of the snout, and the vibrator is discharged to the outside of the snout using a discharge device such as a pump. The dross is discharged outside the snout inside the bath, and by discharging it downward, the dross floats to the surface.
The bath flow is downward, and the Zn-F deposited at the bottom of the bath
Contact with e-based dross, react with All in the bath, and Zn
It becomes Fe-All type dross and floats to the surface.
浴中Ａｌｌも急速に減少させることができ、溶融合金化
亜鉛メッキ鋼板の製造に好適な浴に調整することができ
る。All in the bath can also be rapidly reduced, and the bath can be adjusted to a bath suitable for manufacturing hot-alloyed galvanized steel sheets.
なお、スナウト外の浴は、別の方法で例えば塩化亜鉛と
メッキ浴を反応させ浴中アルミニウムを塩化アルミニウ
ムとして取出し、洛中のアルミニウムを減少することに
より、より短時間で俗調整ができる。The bath outside the snout can be adjusted in a shorter time by using another method, for example, by reacting zinc chloride with the plating bath to extract aluminum in the bath as aluminum chloride and reducing the amount of aluminum in the bath.
スナウト外の浴表面に浮上（遊）したドロスにより、浴
表面部が高濃度アルミニウム含有亜鉛層となってもメッ
キ層の最外層（表面）に付着することになり、加熱によ
る鉄のメッキ層中への拡散には悪影響はなく、むしろ加
工時におけるメッキ特性上好適であるが、ドロスによる
メッキ層外観を損うおそれがあるので、ある程度除去す
ることが好ましい、又浴全体も例えば、アルミニウム濃
度として０．１％±０．０５％に調整することが好まし
い。Due to the floating (free) dross on the bath surface outside the snout, even if the bath surface becomes a zinc layer containing high concentration aluminum, it will adhere to the outermost layer (surface) of the plating layer. There is no negative effect on the diffusion of dross, and it is preferable in terms of plating properties during processing. However, since the appearance of the plating layer may be damaged due to dross, it is preferable to remove it to some extent. It is preferable to adjust it to 0.1%±0.05%.
一方、再度溶融亜鉛メッキ鋼板製造に切替える場合は、
例えば、スナウト内浴表面にある程度ドロスが溜り、ス
ナウト内浴表面部のアルミニウム濃度が所定濃度になる
のをまって切替えるか、スナウト内浴へアルミニウムを
添加する等により、スナウト内ドロスを施し切替えるこ
とができ、又浴全体としても例えば、アルミニウム濃度
として０．２５％±０．０５ ％にアルミニウム添加に
より調整する。On the other hand, when switching to hot-dip galvanized steel sheet production again,
For example, wait until a certain amount of dross has accumulated on the surface of the snout inner bath and the aluminum concentration on the surface of the snout inner bath reaches a predetermined concentration, or switch the switch, or apply dross inside the snout by adding aluminum to the snout inner bath. The aluminum concentration of the bath as a whole can be adjusted to, for example, 0.25%±0.05% by adding aluminum.
このような本発明は、例えば実開昭５３−３５９２０号
、実開昭６０−２３０９６９号、実開昭６２−１４８５
６３号（実公平１−２６７６４号）により開示されてい
るごとく、スナウト内ドロスを排除し、ドロスがメッキ
鋼板（帯）に付着し、メッキ外観の劣化を防止するとと
もに、すり疵の発生を防止するものとは技術思想が全く
別異のものである。Such the present invention is disclosed in, for example, Japanese Utility Model Application Publication No. 53-35920, Japanese Utility Model Application Publication No. 60-230969, and Japanese Utility Model Application Publication No. 62-1485.
As disclosed in No. 63 (Utility Model Publication No. 1-26764), the dross inside the snout is eliminated, and the dross adheres to the plated steel plate (band), preventing deterioration of the plating appearance and preventing the occurrence of scratches. The technical philosophy is completely different from that of the former.
次に本発明方法の一例を図面により説明する。Next, an example of the method of the present invention will be explained with reference to the drawings.
第１図において、鋼帯１をメッキ前処理炉（図示せず）
で表面を清浄化し、連通ずるスナウト２を介してシンク
ロール３によりメッキ浴４へ導き、メッキ後上部へ引き
上げ、ノズル５からガス噴射によりメッキ付看量を調御
し、次いで加熱炉６で加熱し、合金化処理する。In Fig. 1, the steel strip 1 is placed in a plating pretreatment furnace (not shown).
The surface is cleaned with a sink roll 3 through a communicating snout 2 and guided into a plating bath 4. After plating, it is pulled up to the top, the amount of plating is controlled by gas injection from a nozzle 5, and then heated in a heating furnace 6. and then alloyed.
合金化処理しない場合は、加熱炉６をメッキ鋼帯１の通
板位置から外し、合金化処理することなく溶融亜鉛メッ
キ鋼板（帯）として製品とするものである。しかして、
溶融亜鉛メッキ鋼板製造から溶融合金化亜鉛メッキ鋼板
製造に切替えるとき。When alloying is not performed, the heating furnace 6 is removed from the position where the plated steel strip 1 is passed through, and the product is produced as a hot-dip galvanized steel sheet (strip) without alloying. However,
When switching from hot-dip galvanized steel sheet manufacturing to hot-alloyed galvanized steel sheet manufacturing.
スナウト２内浴表面部とスナウト２外浴４八連通するバ
イブ７に設けたポンプ等の排出装置８により、スナウト
２内浴表面に浮遊するドロスをスナウト２外浴４内下向
に浴とともに排出し、ドロスは−旦僅かに沈むが浮上し
、浴流は下方へ流れ底部に堆積しているＺｎ−Ｆａ系の
ドロス９と接触し、浴４中のＡＱはＺｎ−Ｆｅ−Ａｆｉ
系ドロスとなって浮上し、浴中Ａｊｌを急速に減少し、
溶融合金化亜鉛メッキ鋼板製造に好適な浴となる。Dross floating on the surface of the snout 2 inner bath is discharged downward into the snout 2 outer bath 4 along with the bath by a discharge device 8 such as a pump installed in a vibrator 7 that communicates with the surface of the snout 2 inner bath and the snout 2 outer bath 4. The dross sinks slightly but rises to the surface, and the bath flow flows downward and comes into contact with the Zn-Fa-based dross 9 deposited at the bottom, and the AQ in the bath 4 becomes Zn-Fe-Afi
It floats to the surface as dross, rapidly decreasing Ajl in the bath,
This bath is suitable for producing molten metallized galvanized steel sheets.
（実施例） 次に本発明の実施例を比較例とともに挙げる。(Example) Next, examples of the present invention will be listed together with comparative examples.
［実施例］
連続溶融亜鉛メッキ鋼板の製造において次記のごと〈実
施した。[Example] The following was carried out in the production of continuous hot-dip galvanized steel sheets.
１）Ｘナウト内面積： ２００ｍ Ｘ ２０００ｍ２）
浴組成 二Ａ悲０．１８％、残Ｚｎ（温度４７０
℃）３）スナウト内ドロス浮遊ドロス：はゾ前面に浮遊
４）通板速度：８０ｍ／分（板厚０．６閣、巾１２００
ｍｌの鋼帯）５）メッキ浴容量：深さ２０００ｍ、巾２
５００ｍ、長さ３０００ｍ６）メッキ付着量：４Ｇｇ／
ｍｌ
このような条件で溶融亜鉛メッキ鋼板を１００００を製
造した後（このときのスナウト内浴表面のＡＩ濃度４．
４％）、溶融合金化亜鉛メッキ鋼板製造に切替えるため
、操業しながら、スナウト内浴表面部の浴とともにドロ
スを１５０ｆｆｉ／分でスナウト外浴中（浴面下３００
■）下向に５分間排出してスナウト内浴表面ドロスをほ
とんど排除するとともに浴を底部のＺｎ−ｊＦｅ系ドロ
スと接触してＺｎ−Ｆｅ−Ａｉ系ドロスとし、浴組成の
ＡＱを０．１２％に減少せしめたところで、加熱合金化
処理（板温４７０℃、時間１２秒）を開始し、溶融合金
化亜鉛メッキ鋼板を製造したところ鋼板とメッキ層の境
界には高濃度アルミニウム含有亜鉛層はほとんどなく、
鉄量９〜１１％、残亜鉛の合金メッキ層が均一に生成し
た。1) Inner area of Xnaut: 200m x 2000m2)
Bath composition 2A 0.18%, remaining Zn (temperature 470
℃) 3) Dross floating in the snout: Dross floating on the front surface of the snout 4) Threading speed: 80 m/min (thickness 0.6 mm, width 120 mm)
ml steel strip) 5) Plating bath capacity: depth 2000m, width 2
500m, length 3000m6) Plating coverage: 4Gg/
ml After manufacturing 10,000 hot-dip galvanized steel sheets under these conditions (at this time, the AI concentration on the surface of the bath inside the snout was 4.
4%), and in order to switch over to the production of molten alloyed galvanized steel sheets, dross was pumped into the snout outer bath at 150ffi/min along with the bath on the surface of the snout inner bath (300% below the bath surface).
■) Drain downward for 5 minutes to remove most of the dross on the surface of the bath in the snout, and bring the bath into contact with the Zn-jFe dross at the bottom to form Zn-Fe-Ai dross, reducing the AQ of the bath composition to 0.12. %, heat alloying treatment (plate temperature 470°C, time 12 seconds) was started to produce a molten alloyed galvanized steel sheet. There was no high-concentration aluminum-containing zinc layer at the boundary between the steel sheet and the plating layer. Almost no
An alloy plating layer containing 9 to 11% iron and residual zinc was uniformly formed.
なお上記切替時のスナウト内浴表面部のアルミニウム濃
度は０．１４％であった。The aluminum concentration on the surface of the snout inner bath at the time of the above switching was 0.14%.
［比較例］
上記実施例において、スナウト内浴表面ドロスを排除す
ることなく、溶融合金化亜鉛メッキ鋼板の製造に切替え
加熱合金化処理（ラインスピードを低下させ加熱時間１
７秒、板温４７０℃）で十分加熱したが、鉄量３〜８％
、残亜鉛の不均一な合金層の生成となった。[Comparative Example] In the above example, without eliminating the dross on the surface of the bath in the snout, the production of molten alloyed galvanized steel sheet was changed to heat alloying treatment (the line speed was reduced and the heating time was 1.
Although it was sufficiently heated for 7 seconds at a plate temperature of 470℃, the iron content was 3 to 8%.
, resulting in the formation of an uneven alloy layer of residual zinc.
この合金化亜鉛メッキ鋼板の鋼板と合金メッキ層の境界
には平均０．１４μの高濃度アルミニウム含有亜鉛層が
発生していた。In this alloyed galvanized steel sheet, a highly concentrated aluminum-containing zinc layer having an average size of 0.14 μm was generated at the boundary between the steel sheet and the alloy plating layer.
なお上記切替時のスナウト内浴表面部のアルミニウム濃
度は０．８％であった。The aluminum concentration on the surface of the snout inner bath at the time of the above switching was 0.8%.
（発明の効果）
かくすることにより、同−般備での溶融亜鉛メッキ鋼板
と溶融合金化亜鉛メッキ鋼板の製造が確実にでき、工業
的に大きな効果を奏するものである。(Effects of the Invention) By doing so, it is possible to reliably manufacture hot-dip galvanized steel sheets and hot-alloyed galvanized steel sheets using the same general equipment, resulting in great industrial effects.
又スナウト内浴表面ドロスの除去により確実に切替える
ことができ、工業的に安定してできる等の優れた効果が
得られる。Moreover, by removing the dross on the surface of the bath inside the snout, switching can be performed reliably, and excellent effects such as industrial stability can be obtained.
第１図は本発明の一例を示す説明図である。
■・・・鋼帯 ２−・・スナウト３・・・
シンクロール ４・・・メッキ浴５・・ツズル
６・−・加熱炉７・−パイプ ８・
−・排出装置９・・・Ｚｎ−Ｆｅ系ドロスFIG. 1 is an explanatory diagram showing an example of the present invention. ■...Steel strip 2-...Snout 3...
Sinking roll 4... Plating bath 5... Tuzzle
6・-Heating furnace 7・-Pipe 8・
-・Discharge device 9...Zn-Fe dross
Claims (1)
キ鋼板製造に移行するに際し、スナウト内浴表面のドロ
スを除去し、スナウト内浴表面部のアルミニウム濃度を
低下せしめ、鋼板とメッキ層の境界面に高濃度アルミニ
ウム含有亜鉛層の生成を抑制しつつ、メッキすることを
特徴とする、溶融合金化亜鉛メッキ鋼板の製造方法。(1) When transitioning from manufacturing hot-dip galvanized steel sheets to hot-alloyed galvanized steel sheets, the dross on the surface of the snout inner bath is removed, the aluminum concentration on the surface of the snout inner bath is reduced, and the interface between the steel sheet and the plating layer is A method for producing a fusion-alloyed galvanized steel sheet, which comprises plating while suppressing the formation of a zinc layer containing high concentration aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28777989A JPH03150338A (en) | 1989-11-07 | 1989-11-07 | Production of continuous alloying hot dip galvanized steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28777989A JPH03150338A (en) | 1989-11-07 | 1989-11-07 | Production of continuous alloying hot dip galvanized steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03150338A true JPH03150338A (en) | 1991-06-26 |
Family
ID=17721638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28777989A Pending JPH03150338A (en) | 1989-11-07 | 1989-11-07 | Production of continuous alloying hot dip galvanized steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03150338A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6936307B2 (en) * | 2000-11-10 | 2005-08-30 | Usinor | Method and installation for dip coating of a metal strip |
| US6939586B2 (en) * | 2000-11-10 | 2005-09-06 | Usinor | Method and installation for hot process and continuous dip coating of a metal strip |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5749104A (en) * | 1980-09-05 | 1982-03-20 | Nippon Electric Co | Lithium ion conductive solid electrolyte |
| JPS6426764U (en) * | 1987-08-07 | 1989-02-15 |
-
1989
- 1989-11-07 JP JP28777989A patent/JPH03150338A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5749104A (en) * | 1980-09-05 | 1982-03-20 | Nippon Electric Co | Lithium ion conductive solid electrolyte |
| JPS6426764U (en) * | 1987-08-07 | 1989-02-15 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6936307B2 (en) * | 2000-11-10 | 2005-08-30 | Usinor | Method and installation for dip coating of a metal strip |
| US6939586B2 (en) * | 2000-11-10 | 2005-09-06 | Usinor | Method and installation for hot process and continuous dip coating of a metal strip |
| CZ298795B6 (en) * | 2000-11-10 | 2008-01-30 | Sollac | Method and apparatus for dip coating of metal strip |
| CZ299077B6 (en) * | 2000-11-10 | 2008-04-16 | Sollac | Process and apparatus for continuous hot dip coating a metal strip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS63504B2 (en) | ||
| JPS5835590B2 (en) | Finishing method and apparatus for hot-plating ferrous base metal strip with hot-melt coating metal | |
| AU604862B2 (en) | A method for controlling the thickness of an intermetallic layer on a continuous steel product in a continuous hot-dip galvanizing process | |
| US4971842A (en) | Method for controlling the thickness of an intermetallic layer on a continuous steel product in a continuous hot-dip galvanizing process | |
| US3479210A (en) | Method and apparatus for controlling coating metal temperature in a hot-dip coating bath | |
| US4173663A (en) | Dipless metallizing process and apparatus | |
| JP2003524702A (en) | Method for producing hot-dip galvanized steel sheet having no dross incorporation defect in film and related apparatus | |
| JPH03150338A (en) | Production of continuous alloying hot dip galvanized steel sheet | |
| JPH07157853A (en) | Method for removing zinc fume in snout of hot dip metal coating and device therefor | |
| JPH10226864A (en) | Production of hot dip galvanized steel sheet | |
| JPH05271893A (en) | Manufacture of galvanized steel sheet and device therefor | |
| JPH07150320A (en) | Hot dip metal coating method and device thereof | |
| KR100276323B1 (en) | The dross adhere preventor for coating surface | |
| JPH03211263A (en) | Equipment for producing hot dip galvanized steel sheet | |
| JPH0115588B2 (en) | ||
| JP2951177B2 (en) | Metal strip hot dip coating equipment | |
| JPH03166352A (en) | Method for controlling bottom dross in hot dip galvanizing bath | |
| JPH03166351A (en) | Method for controlling bottom dross in hot dip galvanizing bath | |
| JPH02217453A (en) | Method for post-processing plated steel strip in hot-dip metal parting | |
| JPH09324252A (en) | Production of zero spangled hot dip galvanized steel sheet | |
| JPS6059057A (en) | Production of steel sheet alloyed on one side to different thickness | |
| JPH03134146A (en) | Continuous hot dip metal plating method | |
| JPH04247861A (en) | Continuous galvanizing method and device | |
| JPH03158450A (en) | Production of hot dip galvanized steel sheet having smooth surface | |
| JP2002220651A (en) | Method for manufacturing hot-dip galvanized steel sheet |