JPH0313256A - Method for preventing carbon pickup in continuous casting of molten steel - Google Patents
Method for preventing carbon pickup in continuous casting of molten steelInfo
- Publication number
- JPH0313256A JPH0313256A JP14526589A JP14526589A JPH0313256A JP H0313256 A JPH0313256 A JP H0313256A JP 14526589 A JP14526589 A JP 14526589A JP 14526589 A JP14526589 A JP 14526589A JP H0313256 A JPH0313256 A JP H0313256A
- Authority
- JP
- Japan
- Prior art keywords
- continuous casting
- mold
- molten steel
- mold powder
- molding powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 10
- 238000000034 method Methods 0.000 title claims description 7
- 239000000843 powder Substances 0.000 claims abstract description 49
- 239000011261 inert gas Substances 0.000 claims abstract description 16
- 238000007654 immersion Methods 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 abstract 7
- 239000007789 gas Substances 0.000 description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 101100348017 Drosophila melanogaster Nazo gene Proteins 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、連続鋳造におけるカーボンピックアップ防
止方法に関し、とくに極低炭素１ｍ （Ｃ＜６０ ｐｐ
ｍ）の連続鋳造に利用して好適なものである。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for preventing carbon pickup in continuous casting, particularly for extremely low carbon 1 m (C<60 pp
It is suitable for use in continuous casting of (m).
（従来の技術）
溶鋼の連続鋳造における問題の一つとして、連鋳モール
ド内におけるモールドパウダーからの浸炭現象いわゆる
Ｃビックアンプがある。かようなＣピックアップによる
Ｃの増加量は、処理条件によっても異なるが、通常２０
〜３０ρｐｉにも達し、とくに極低炭素鋼の製造の際に
問題となる。(Prior Art) One of the problems in continuous casting of molten steel is the carburization phenomenon from mold powder in the continuous casting mold, so-called C big amplifier. The amount of increase in C due to such C pickup varies depending on the processing conditions, but is usually 20
It can reach up to ~30 ρpi, which is a problem especially in the production of ultra-low carbon steel.
このためかかるＣピックアップの防止に関しては、従来
から種々の対策が講じられ、たとえば特開昭６３−１７
４７６７号公報では、モールドパウダー中のＣ濃度を低
減することを提案している。For this reason, various measures have been taken to prevent such C pickup, for example, Japanese Patent Laid-Open No. 63-17
Publication No. 4767 proposes reducing the C concentration in mold powder.
しかしながらモールドパウダー中のＣ濃度を低減すると
、パウダーの溶解が過大となって、第２図に示すように
、パウダー溶融層が厚くなる一方、逆にパウダー粉体層
は薄くなるため、モールド内溶鋼の保温性が低下してデ
ソケルなどの発生を招く結果、スラブの表面性状が劣化
するという問題があった。However, if the C concentration in the mold powder is reduced, the powder melts excessively, and as shown in Figure 2, the molten powder layer becomes thicker, but conversely, the powder layer becomes thinner, so the molten steel inside the mold is reduced. There was a problem in that the heat retention properties of the slab deteriorated, leading to the occurrence of desoquelation and the like, resulting in deterioration of the surface quality of the slab.
またＣピックアップの防止策としては、モールドパウダ
ーの溶融特性を向上させる目的で、プリメルトタイプの
モールドパウダーを使用する方法も提案されている。Furthermore, as a measure to prevent C pickup, a method of using pre-melt type mold powder has been proposed for the purpose of improving the melting characteristics of the mold powder.
しかしながらこのプリメルトタイプのモールドパウダー
は、−旦溶融させてから製造する必要があるため、コス
トが嵩むという欠点があった。However, this pre-melt type mold powder has the drawback of high cost because it needs to be manufactured after being melted first.
（発明が解決しようとする課題）
この発明は、上記の問題を有利に解決するもので、モー
ルドパウダー中のＣ濃度を低下させることなく、またブ
リメルト化する必要なしに、モールドパウダーからのＣ
ピックアップを効果的に防止することができる方法を提
案することを目的とする。(Problems to be Solved by the Invention) The present invention advantageously solves the above problems, and eliminates carbon from the mold powder without reducing the carbon concentration in the mold powder and without the need for brimelting.
The purpose is to propose a method that can effectively prevent pickup.
（課題を解決するための手段）
すなわちこの発明は、取鍋内の溶鋼をイマージョンノズ
ルを介して連続鋳造モールドへ供給し、モールドパウダ
ーの介在下に連続鋳造を行うに際し、
該モールドパウダー中に２．５１％（以下単に％で示す
）以上のＣを含有させた上で、該モールドパウダー中の
Ｃ量とイマージョンノズルを介して連続鋳造用モールド
内に吹き込まれる不活性ガス流量とが次式
％式％
ここでＡ：モールドパウダー中のＣ量（％）Ｂ：不活性
ガス流量（１／ｍ１ｎ）
の関係を満足する条件下に連続鋳造を行うことからなる
溶鋼の連続鋳造におけるカーボンピックアップ防止方法
である。(Means for Solving the Problems) That is, in the present invention, when molten steel in a ladle is supplied to a continuous casting mold through an immersion nozzle and continuous casting is performed in the presence of mold powder, molten steel is contained in the mold powder. .51% (hereinafter simply expressed as %) or more of C is contained, and the amount of C in the mold powder and the flow rate of the inert gas blown into the continuous casting mold via the immersion nozzle are calculated by the following formula % Formula % Here, A: Amount of C in mold powder (%) B: Flow rate of inert gas (1/m1n) A method for preventing carbon pickup in continuous casting of molten steel, which involves performing continuous casting under conditions that satisfy the following relationship: It is.
（作用）
以下、この発明を由来するに至った実験結果に基づき、
この発明を具体的に説明する。(Function) Below, based on the experimental results that led to this invention,
This invention will be specifically explained.
第３図に、モールドパウダー中のＣ星とこのパウダーを
用いて製造されたスラブの表面欠陥（のろかみ）発生個
数との関係を示す。FIG. 3 shows the relationship between C stars in the mold powder and the number of surface defects (sluggishness) generated in slabs manufactured using this powder.
同図より明らかなように、のるかみの発生個数をボ当た
り１個以下に抑制するためには、モールドパウダー中に
２．５％以上のＣを含有させる必要がある。As is clear from the figure, in order to suppress the number of grains generated to one or less per mold, it is necessary to contain 2.5% or more of C in the mold powder.
このＣ量は、モールドパウダーの溶融層厚で表すと、第
２図から明らかなように、４０ｍｍ以下に相当する。As is clear from FIG. 2, this amount of C corresponds to 40 mm or less when expressed in terms of the thickness of the molten layer of the mold powder.
次に第４図に、モールドパウダーの溶融層厚とＣピック
アツプ量との関係を示す。Next, FIG. 4 shows the relationship between the thickness of the molten layer of mold powder and the amount of C pick-up.
同図より明らかなように、溶融層厚が３０ｍｍ以上であ
れば、Ｃビ、ツクアップ量を’４ ｐｐｍ以下に抑制す
ることができる。As is clear from the figure, if the thickness of the melted layer is 30 mm or more, the amount of C-bi and pick-up can be suppressed to 4 ppm or less.
ここに溶融層厚が厚くなるほどＣピック、アップ量が減
少する理由は、溶融層中のＣは溶鋼に近い領域では高温
にさらされるため燃焼してＣ濃度が低くなるが、溶融層
厚が厚くなるほど溶鋼近傍の温度が上界し、Ｃの燃焼が
促進されるためと考えられる。The reason why the amount of C pick-up decreases as the molten layer becomes thicker is that the C in the molten layer is exposed to high temperatures in areas close to the molten steel, so it burns and the C concentration decreases. Indeed, it is thought that this is because the temperature near the molten steel rises and the combustion of C is promoted.
してみれば連続鋳造時において、のるかみの発生を招く
ことなしにＣピックアップを防止するためには、モール
ドパウダーの溶融層厚を３０〜４０１、換言すればモー
ルドパウダー中のＣｌを２．５〜２．８％の範囲に規制
すれば良いと考えられる。In order to prevent C pickup without causing slag during continuous casting, the thickness of the molten layer of the mold powder should be 30 to 40 mm, in other words, the Cl in the mold powder should be 2 mm. It is considered that it is sufficient to regulate it within the range of 5 to 2.8%.
そこで発明者らは、モールドパウダー中の（Ｊｌを上記
の範囲に制限して、極低炭素鋼の連続鋳造を数多く試み
たところ、Ｃｌを制限しただけでは必ずしも良好な溶融
層厚は１１Ｔられないことが判明した。Therefore, the inventors tried many continuous castings of ultra-low carbon steel by restricting the Jl in the mold powder to the above range, and found that a good molten layer thickness cannot necessarily be obtained by simply restricting the Cl content. It has been found.
そこで発明者らは、この原因を解明すべ（、さらに研究
を重ねた結果、モールドパウダーの）界磁層厚は、単に
モールドパウダー中のＣ量のみによって決まるわけでは
なく、イマージョンノズルの詰まり防止のため該ノズル
内に供給されひいては連鋳モールド内に流入する不活性
ガスの影響も大きいことの知見を得た。Therefore, the inventors tried to elucidate the cause of this problem (and as a result of further research, they found that the field layer thickness of the mold powder is not determined solely by the amount of C in the mold powder, but also that it is necessary to prevent clogging of the immersion nozzle. Therefore, it was found that the influence of the inert gas supplied into the nozzle and eventually flowing into the continuous casting mold was also large.
すなわち連鋳モールド内にＡｒなとの不活性ガスが流入
すると、モールド内溶泪の撹拌が盛んになって溶鋼表面
への熱供給Ｖが多くなる結果、溶融層厚の増大を招くこ
とが判明したのである。In other words, it has been found that when an inert gas such as Ar flows into the continuous casting mold, the molten water inside the mold is actively stirred and the heat supply V to the molten steel surface increases, resulting in an increase in the molten layer thickness. That's what I did.
そこで次に、好適な溶融層厚（３０〜イＯｍｉｎ ）を
導くモールドパウダー中のＣ１０と連鋳モールド内への
不活性ガス流星との関係について調査したところ、第１
図に示す結果を得た。Next, we investigated the relationship between C10 in the mold powder, which leads to a suitable molten layer thickness (30~I Omin), and the inert gas meteor into the continuous casting mold.
The results shown in the figure were obtained.
すなわちモールドパウダー中にＣを２．５％以上含有さ
せ、しかもこのＣ量と不活性ガス流星とが下記式
％式％
ここでＡ：モールドパウダー中の＋４（％）Ｂ：不活性
ガス流量（ｆｆ／ｍ１ｎ）
の関係を満たすように調整してやれば、のるかみの発生
を招くことなしに効果的にＣピンクアンプが防止できる
ことが究明されたのである。That is, 2.5% or more of C is contained in the mold powder, and the amount of C and the inert gas meteor are expressed by the following formula % where A: +4 (%) in the mold powder B: Inert gas flow rate ( It has been found that by making adjustments to satisfy the relationship (ff/m1n), C pink amplification can be effectively prevented without causing sagging.
なおイマージョンノズル内へ不活性ガスを吹き込む方法
としては、ノズル上部または上ノズルあるいは直接イマ
ージョンノズル内に吹き込む方法など種々あるけれども
、モールド内へ流れ込む効果としてはいずれも同等であ
る。There are various methods for blowing the inert gas into the immersion nozzle, such as blowing it into the upper part of the nozzle, through the upper nozzle, or directly into the immersion nozzle, but all of them have the same effect of flowing into the mold.
参考のため第５図に、」−ノズルに不活性ガスを吹き込
んだ場合におけるガスの流れを図解する。For reference, FIG. 5 illustrates the flow of gas when inert gas is blown into the nozzle.
（実施例）
実施例Ｉ
Ｃ含有量： １８ｐｐｍの極低炭素溶鋼を、以下の条件
で連続鋳造した。(Example) Example I Ultra-low carbon molten steel with C content: 18 ppm was continuously cast under the following conditions.
・モールドサイズ ２６０ Ｘ １６００ｍｍ・モール
ドパウダー組成 Ｃ：、１．０％７ＣａＯ： ４０％、
５ｉＯｚ ： ４０％、ΔＩｚ（ｈ ： ５％。・Mold size 260 x 1600mm ・Mold powder composition C:, 1.0% 7CaO: 40%,
5iOz: 40%, ΔIz(h: 5%.
ＮａｚＯニア％１ Ｆ：４％
・へｒガス流ｆｆｔ ： １０ ！！、 ／ｎ＋ｉｎか
くして得られた鋳片のＣ４度を調べたところ２１ｐｐｍ
であり、Ｃピック７９１里は３ ｐｐｍにすぎなかった
。またのるかみの発生個数は０．４個／ｍｍ”であった
。NazO near% 1 F: 4% ・Here gas flow fft: 10! ! , /n+in When the C4 degree of the thus obtained slab was examined, it was 21 ppm.
The C pick 791 ri was only 3 ppm. Further, the number of grains generated was 0.4 pieces/mm''.
比較例１
実施例１と同一のモールドで、Ｃ：２２ｐｐｍの極低炭
素溶鋼を、モールドパウダー中Ｃ濃度：５．５％、静ガ
ス流量＝１０β／ｍｉｎの条件で連続鋳込したところ、
Ｃのピックアツプ量は１．５ｐｐｍにも達した。Comparative Example 1 In the same mold as in Example 1, ultra-low carbon molten steel with C: 22 ppm was continuously cast under the conditions of C concentration in mold powder: 5.5% and static gas flow rate = 10 β/min.
The pick-up amount of C reached as much as 1.5 ppm.
実施例２
実施例１と同一のモールドで、Ｃ： １５ｐｐｍ）＋’
ｆｆｌ低炭素溶鋼を、モールドパウダー中ｃ？ａ度：５
．３％、静ガス流量： ２０１ ／ｍｉｎの条件で連続
鋳造したところ、Ｃのピックアツプ量は２ ｐｐｍであ
った。またのろかみ発生個数は０．３５個／ｍｍ”であ
った。Example 2 In the same mold as Example 1, C: 15 ppm)+'
ffl low carbon molten steel in mold powder c? A degree: 5
．． When continuous casting was performed under the conditions of 3% and static gas flow rate: 201/min, the amount of C picked up was 2 ppm. The number of sluggish spots was 0.35/mm''.
（発明の効果）
かくしてこの発明によれば、溶鋼の連続鋳造において、
のるかみなどの表面欠陥を生じることなしにモールドパ
ウダーからのＣピックアップを効果的に防止することが
でき、とくに極低炭素鋼の安定鋳造に大きく貢献する。(Effect of the invention) According to this invention, in continuous casting of molten steel,
It can effectively prevent C pickup from mold powder without producing surface defects such as smudges, and it greatly contributes to stable casting of ultra-low carbon steel in particular.
第１図は、好適な溶融層厚を導くモールドパウダー中の
Ｃ量と連鋳モールド内への不活性ガス流星との関係を示
したグラフ、
第２図は、モールドパウダー中のＣ量と該パウダーの溶
融層厚との関係を示したグラフ、第３図は、モールドパ
ウダー中のＣ量とのるかみの発生個数との関係を示した
グラフ、第４図は、モールドパウダーの溶融層厚とＣピ
ックアツプ量との関係を示したグラフ、第５図は、上ノ
ズルに不活性ガスを吹き込んだ場合におけるガスの流れ
を示した図である。
１・・・モールド
２・・・モールドパウダー未溶融層
３・・・モールドパウダー溶融層
４・・・イマージョンノズル
５・・・イマージョンノズル内Ａｒガス吹き込み配管６
・・・）容鋼
第１図
Ａｐがヌコ１１（イ×贋、・ガ）
第２図
そ−ルＦ／ぐウヂ呵ｐｒｔｃ量イ％）
第３図
そ−ルドへ１ウデー中Ｃ！（％）
零Ｍｌ＃ｆ（ｖｒ４ｎ）Figure 1 is a graph showing the relationship between the amount of C in the mold powder that leads to a suitable molten layer thickness and the inert gas meteor into the continuous casting mold. A graph showing the relationship between the thickness of the molten layer of the powder, Figure 3 is a graph showing the relationship between the amount of C in the mold powder and the number of smudges, and Figure 4 is a graph showing the relationship between the thickness of the molten layer of the mold powder. FIG. 5 is a graph showing the relationship between C pick-up amount and C pick-up amount, and is a diagram showing the flow of gas when inert gas is blown into the upper nozzle. 1...Mold 2...Mold powder unmelted layer 3...Mold powder molten layer 4...Immersion nozzle 5...Ar gas blowing piping 6 in the immersion nozzle
...) Figure 1 Ap is Nuko 11 (I x Fake, · Ga) Figure 2 Sole F/Guji 2 prtc amount I%) Figure 3 Sole 1 Uday C! (%) Zero Ml #f (vr4n)
Claims (1)
造モールドへ供給し、モールドパウダーの介在下に連続
鋳造を行うに際し、 該モールドパウダー中に２．５ｗｔ％以上のＣを含有さ
せた上で、該モールドパウダー中のＣ量とイマージョン
ノズルを介して連続鋳造用モールド内に吹き込まれる不
活性ガス流量とが次式 ２／１５Ｂ＋２．５≦Ａ≦２／１５Ｂ＋２．８ここでＡ
：モールドパウダー中のＣ量 （ｗｔ％） Ｂ：不活性ガス流量（ｌ／ｍｉｎ） の関係を満足する条件下に連続鋳造を行うことを特徴と
する溶鋼の連続鋳造におけるカーボンピックアップ防止
方法。[Claims] 1. When supplying molten steel in a ladle to a continuous casting mold through an immersion nozzle and performing continuous casting in the presence of mold powder, 2.5 wt% or more of C is contained in the mold powder. The amount of C in the mold powder and the flow rate of inert gas blown into the continuous casting mold through the immersion nozzle are determined by the following formula: 2/15B+2.5≦A≦2/15B+2.8 DeA
: Amount of C in mold powder (wt%) B: Flow rate of inert gas (l/min) A method for preventing carbon pickup in continuous casting of molten steel, characterized by performing continuous casting under conditions that satisfy the following relationship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14526589A JPH0313256A (en) | 1989-06-09 | 1989-06-09 | Method for preventing carbon pickup in continuous casting of molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14526589A JPH0313256A (en) | 1989-06-09 | 1989-06-09 | Method for preventing carbon pickup in continuous casting of molten steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0313256A true JPH0313256A (en) | 1991-01-22 |
| JPH057106B2 JPH057106B2 (en) | 1993-01-28 |
Family
ID=15381135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14526589A Granted JPH0313256A (en) | 1989-06-09 | 1989-06-09 | Method for preventing carbon pickup in continuous casting of molten steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0313256A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002540001A (en) * | 1999-03-24 | 2002-11-26 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Windshield wiper |
| US9021651B2 (en) | 2010-12-27 | 2015-05-05 | Robert Bosch Gmbh | Wiper device, in particular a motor vehicle windshield wiper device |
| CN110181011A (en) * | 2019-06-25 | 2019-08-30 | 华北理工大学 | A kind of method and its system improving Continuous Casting Square, round billet surface quality |
-
1989
- 1989-06-09 JP JP14526589A patent/JPH0313256A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002540001A (en) * | 1999-03-24 | 2002-11-26 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Windshield wiper |
| US9021651B2 (en) | 2010-12-27 | 2015-05-05 | Robert Bosch Gmbh | Wiper device, in particular a motor vehicle windshield wiper device |
| CN110181011A (en) * | 2019-06-25 | 2019-08-30 | 华北理工大学 | A kind of method and its system improving Continuous Casting Square, round billet surface quality |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH057106B2 (en) | 1993-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN119187484A (en) | System, method and steel plate for preventing carburetion of surface layer of continuous casting high-pulling-rate casting blank | |
| JP7688269B2 (en) | Mold powder for continuous casting and method for continuous casting of steel | |
| WO1992009387A1 (en) | Process for continuous casting of ultralow-carbon aluminum-killed steel | |
| JP2006312200A (en) | Continuous casting powder for Al-containing Ni-base alloy and continuous casting method | |
| JPWO1992009387A1 (en) | Continuous casting method for ultra-low carbon aluminum-killed steel | |
| JPH0985404A (en) | Flux for continuous casting of molten steel containing A1 and continuous casting method | |
| CN116179942B (en) | A kind of 20MnCrS5 steel and its preparation method and application | |
| JPH057106B2 (en) | ||
| FR2690462A1 (en) | Process for producing copper with a very low oxygen content. | |
| JPH05277680A (en) | Flux for continuous casting | |
| JP2000001731A (en) | Hypereutectic Al-Si alloy die casting member and method of manufacturing the same | |
| JPH07138709A (en) | Stainless steel for horizontal continuous casting of wire rod with excellent long-term castability | |
| JP3660811B2 (en) | Steel wire rod and manufacturing method thereof | |
| JPH0199761A (en) | Method for continuously casting aluminum killed steel | |
| CA2091857A1 (en) | Process and apparatus for manufacturing low-gas and pore-free aluminum casting alloys | |
| JPH0639505A (en) | Method for casting molten titanium-containing stainless steel | |
| JP3474451B2 (en) | Manufacturing method of continuous cast billet of mild steel | |
| JP3807377B2 (en) | Ca treatment method for low Al molten steel | |
| JPH10211546A (en) | Hot-top casting method | |
| JP3631629B2 (en) | Mild steel for strips and its manufacturing method | |
| JPH0751822A (en) | Molten steel surface heat retaining agent | |
| JPH11217652A (en) | Steel for strip, Si-killed steel, and production method by continuous casting | |
| KR100406413B1 (en) | Method of continuous casting weathering steel for cold rolling | |
| JPS61169147A (en) | Continuous casting method | |
| JP2593385B2 (en) | Continuous casting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |