JPH11320060A - Method for continuous light reduction rolling for cast slab of billet and equipment therefor - Google Patents

Method for continuous light reduction rolling for cast slab of billet and equipment therefor

Info

Publication number
JPH11320060A
JPH11320060A JP13487698A JP13487698A JPH11320060A JP H11320060 A JPH11320060 A JP H11320060A JP 13487698 A JP13487698 A JP 13487698A JP 13487698 A JP13487698 A JP 13487698A JP H11320060 A JPH11320060 A JP H11320060A
Authority
JP
Japan
Prior art keywords
roll
slab
billet
rolls
light reduction
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Withdrawn
Application number
JP13487698A
Other languages
Japanese (ja)
Inventor
Shigenori Tanaka
重典 田中
Mitsuo Uchimura
光雄 内村
Koichi Kudo
紘一 工藤
Masahiro Toki
正弘 土岐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Nippon Steel Plant Designing Corp
Original Assignee
Nittetsu Plant Designing Corp
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nittetsu Plant Designing Corp, Nippon Steel Corp filed Critical Nittetsu Plant Designing Corp
Priority to JP13487698A priority Critical patent/JPH11320060A/en
Publication of JPH11320060A publication Critical patent/JPH11320060A/en
Withdrawn legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To reduce the number of rolls for light reduction rolling as much as possible and to decrease the size of granular segregation by jetting spray water to a gap between the rolls for light reduction rolling and a cast slab from the upstream side in the casting direction. SOLUTION: The surface of the cast slab 1 is cooled at the time of executing the light reduction rolling with the rolls 2 by penetrating the cooling water 4 jetted with spray nozzles 3 into the gap between the rolls 2 and the billet 1. Since the water pressure is raised with the roll 2, the water is not boiled and the efficiency of heat removal is rapidly raised in the transitional zone. Therefore, the surface temp. of the cast slab 1 can be reduced even with the small quantity of water. This effect is remarkably developed at the width center part which undergoes mostly the rolling reduction, and the rolling reduction is efficiently executed. For example, the spray nozzles 3 are disposed at front of the rolls 2 and the cooling water 4 is jetted at about 50-200 l/min flow rate and thus, the interval between the roll sets can be widened to about 700 mm and as a result, the number of the roll parts 2 can be reduced to four pairs.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、連続鋳造でビレ
ットを鋳造する際に生じる粒状偏析を改善する軽圧下方
法に関する技術である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique relating to a light reduction method for improving granular segregation generated when a billet is cast by continuous casting.

【0002】[0002]

【従来の技術】近年、鉄鋼業においては、省エネルギー
を目的になるべく製品に近いサイズで素材を製造するい
わゆるニアネットシェイプ鋳造が盛んに行われており、
線材を製造する際にも従来の例えば一辺が400mm 程度あ
るブルームを鋳造してその後分塊圧延を行ってビレット
を製造する工程から、分塊工程を省略した、小断面のビ
レットを直接鋳造してその後、直接線材を製造する圧延
工程にビレットを持っていく工程が開発されている。
2. Description of the Related Art In recent years, in the steel industry, so-called near net shape casting for producing a material in a size close to a product as much as possible for energy saving has been actively performed.
When manufacturing wire rods, the conventional process of casting a bloom having a side of about 400 mm, for example, and then performing lumping and rolling to produce a billet, directly omitting the lumping step, directly casting a small-section billet. Subsequently, a process of bringing billets to a rolling process for directly manufacturing a wire rod has been developed.

【0003】その際に問題になるのは、従来の分塊工程
の圧延でサイズを小さくしていた粒状偏析のサイズを鋳
造段階で軽減する技術である。
At that time, a problem is a technique of reducing the size of the granular segregation, which had been reduced in size in the conventional lumping process, in the casting stage.

【0004】この粒状偏析が大きいまま鋳片に残存する
と線材に伸線する際に、硬さが違うことにより破断が生
じる。
[0004] If the granular segregation remains in the slab while being large, breakage occurs due to the difference in hardness when the wire is drawn.

【0005】この対策として、連続鋳造設備の二次冷却
後の引き抜き矯正ロールで軽圧下を加えて粒状偏析やセ
ンターポロシティーを軽減する方法が特にブルームでは
数多く提案されている。
[0005] As a countermeasure, there have been proposed many methods for reducing granular segregation and center porosity by applying light pressure with a drawing straightening roll after secondary cooling in a continuous casting facility, particularly in Bloom.

【0006】ビレットの鋳造においては、特開平2-1601
51号公報では捻れをなくす為の軽圧下ロールと引き続く
カリバーロールでの矯正法が開示され、また、特開平6-
63715 号公報では内部割れ防止の為の軽圧下前のガイド
ロールを設置している。更に、特開平9-253798号公報で
は丸ビレット製造の際にノズル詰まりの防止の為に溶鋼
を加熱した後に鋳造してモールド内で電磁撹拌した後に
クレーターエンドで軽圧下する方法が示されている。
[0006] In the casting of billets, Japanese Unexamined Patent Publication No.
No. 51 discloses a straightening method using a light rolling roll for eliminating twist and a subsequent caliber roll.
In Japanese Patent No. 63715, a guide roll before light reduction is installed to prevent internal cracks. Furthermore, Japanese Patent Application Laid-Open No. 9-253798 discloses a method in which molten steel is heated and then cast to prevent the nozzle clogging during round billet production and then electromagnetically stirred in a mold and then lightly reduced at a crater end. .

【0007】一方、ブルーム鋳造においては、例えば鋳
型内の電磁撹拌装置を用いて鋳片の中心部を等軸晶化し
た後に軽圧下して粒状偏析粒径のサイズを減少させる発
明も報告されている。報告では、中心部が等軸晶化する
と偏析成分の濃化した溶鋼が分散しやすく、いわゆるV
偏析にはなるが、軽圧下を加えることによりV偏析が生
じる部分の等軸晶化した半凝固状態の溶鋼流動を抑制出
来、粒状偏析のサイズを軽減できるとしている。また、
溶鋼流動が生じる鋳片の中心固相率は0.05ないし0.1 と
言われている。さらに特開平5-138321号公報ではセンタ
ーポロシティーを圧着させる方法としてロールの中央部
に凸部を形成した段付ロール直前にミストスプレーで鋳
片の表面を冷却して鋳片表面の塑性変形を防止してピン
チロールの凸部による圧下を中心部まで浸透させること
が提案されている。
On the other hand, in bloom casting, an invention has been reported in which the center of a slab is made equiaxed using, for example, an electromagnetic stirrer in a mold, and then lightly pressed to reduce the size of the granular segregated grain size. I have. It has been reported that when the central part is equiaxed, molten steel in which segregated components are concentrated is easily dispersed.
Although segregation occurs, the application of light reduction can suppress the flow of molten steel in a semi-solid state in which equiaxed crystallizing occurs in a portion where V segregation occurs, and reduce the size of granular segregation. Also,
It is said that the center solid fraction of the slab where the molten steel flow occurs is 0.05 to 0.1. Further, in Japanese Patent Application Laid-Open No. 5-138321, as a method of pressing the center porosity, the surface of the slab is cooled by mist spray immediately before a stepped roll having a convex portion formed at the center of the roll to reduce the plastic deformation of the slab surface. It has been proposed to prevent this and allow the depression by the convex portion of the pinch roll to penetrate to the center.

【0008】[0008]

【発明が解決しようとする課題】上記の従来例から見ら
れるように、特にビレットの鋳造では、軽圧下時に内部
割れの防止が課題になりそのためのロール間隔や軽圧下
前の鋳片の厚みを規定している。
As can be seen from the above conventional example, especially in the casting of billets, prevention of internal cracks at the time of light reduction is a problem. Therefore, the gap between rolls and the thickness of the slab before light reduction are reduced. Stipulates.

【0009】この理由は、以下のように考えられる。即
ち、ビレットはブルームに比べてサイズが小さい。従っ
て、ビレットはブルームに比べて鋳片の凝固厚みが小さ
い。例えば、140mm厚のビレットでは軽圧下時の凝
固厚みは65mm程度またはそれ以上、300mm厚ブ
ルームでは140mm程度またはそれ以上となり、ビレ
ットはロールの圧下力が中心に伝わりやすいが反面凝固
界面での割れ(内部割れ)を生じやすい。その対策とし
て、1対のロール当たりの圧下量を減少するため、ロー
ル本数を多数構えることが考えられる。
The reason is considered as follows. That is, the billet is smaller in size than the bloom. Accordingly, the billet has a smaller solidified thickness of the slab than the bloom. For example, in the case of a billet having a thickness of 140 mm, the solidification thickness under light pressure is about 65 mm or more, and in the case of a bloom having a thickness of 300 mm, it is about 140 mm or more. (Internal crack). As a countermeasure, it is conceivable to prepare a large number of rolls in order to reduce the amount of reduction per pair of rolls.

【0010】しかし、従来の軽圧下法では軽圧下を行う
為のロール本数は、例えば特開平6-63715 号公報の図に
見られるように、6ないし8対と多いが、一対のロール
の圧下には0.1mm のオーダーの精度を要する為に、その
整備には大変な労力を要し、反対にロール整備が不十分
であると満足する品質の鋳片が製造されないという問題
があった。
However, in the conventional light reduction method, the number of rolls for performing the light reduction is as large as 6 to 8 pairs as shown in the drawing of Japanese Patent Application Laid-Open No. 6-63715. However, it requires a precision of the order of 0.1 mm, so that it requires a great deal of labor to maintain it. On the contrary, if the roll maintenance is insufficient, there is a problem that a slab of satisfactory quality cannot be produced.

【0011】本発明の目的は、ビレットにおいて軽圧下
を行う際に、内部割れが発生しない範囲でロールの本数
を極限まで少なくして、かつ粒状偏析のサイズを小さく
する、軽圧下方法に関するものである。
An object of the present invention is to provide a light rolling method for reducing the number of rolls as much as possible without causing internal cracks and reducing the size of granular segregation in a billet under light rolling. is there.

【0012】[0012]

【課題を解決するための手段】発明者らは、軽圧下する
際のロール間隔を広げる方策を種々検討した。特開平5-
138321号公報にある様に、表面をミストスプレーで冷却
すれば、表面の塑性変形が抑えらる。ビレットの場合に
は従来技術で述べたように鋳片のサイズが小さいので、
自ずから内部割れが生じやすいくらいに圧下は中心部に
浸透するが、表面の塑性変形が抑えられれば、圧下時の
鋳片のたわみ曲率半径が増加する。そのことによる、圧
下の中心部への浸透は、温度が下がった鋳片表面の変形
に力が消費されるためにわずかに減少するが、凝固殻の
曲げの曲率半径が増加するために凝固界面に発生する歪
みは減少して内部割れの防止が、理論的には可能にな
る。
Means for Solving the Problems The present inventors have studied various measures for widening the roll interval when reducing the pressure slightly. JP 5-
As described in JP-A-138321, if the surface is cooled by mist spray, plastic deformation of the surface is suppressed. In the case of billets, the size of the slab is small as described in the prior art,
The rolling penetrates into the central portion so that internal cracks are easily generated by itself, but if the plastic deformation of the surface is suppressed, the bending radius of curvature of the slab during rolling increases. As a result, the penetration into the center of the reduction is slightly reduced due to the consumption of force for deformation of the slab surface at a reduced temperature, but the solidification interface is increased due to the increase in the radius of curvature of the solidified shell bending. Is reduced, and the prevention of internal cracking is theoretically possible.

【0013】そこで、軽圧下ロールの間でのミストスプ
レーをまず計画したが、ビレットの場合にはブルームに
比べて鋳造するときのサイズが小さい為に、スプレーの
冷却水がビレットの上面の端から流れ落ちてビレットの
側面をも冷却することがわかった。逆に水の量を側面ま
で冷えない量に落とすと上面も十分に冷却されないこと
もわかった。この理由は、ブルームのサイズは一辺が4
00mmから500mmであるが、ビレットは140m
m以下である。ビレットはそのサイズが小さいことか
ら、ブルームに比べて表面積と体積の比が大きい。たと
えば、400mmx500mmのブルームに比べて14
0mmのビレットでは表面積と体積の比は0.009と
0.028とおよそ3倍になる。したがって、表面の冷
却によりビレットはブルームより良く冷却される。ま
た、ビレットの場合、幅方向での未凝固部分は10mm
程度あるにくらべて、凝固部分は130mm程度あり、
これもブルームのおよそ、未凝固部110mm,凝固部
390mmに比べると未凝固部分の幅は小さく、側面が
冷却されてその温度が下がると容易にロールで圧下出来
ないことがわかった。
Therefore, mist spraying between rolls under light pressure was first planned. In the case of a billet, since the size of the billet during casting was smaller than that of a bloom, the cooling water of the spray was discharged from the upper end of the billet. It was found that it ran down and also cooled the side of the billet. Conversely, it was also found that if the amount of water was reduced to a level that did not cool down to the side, the upper surface was not sufficiently cooled. The reason for this is that the size of the bloom is 4
From 00mm to 500mm, billet is 140m
m or less. Due to the small size of billets, the ratio of surface area to volume is larger than that of bloom. For example, compared to a 400 mm x 500 mm bloom,
For a 0 mm billet, the ratio of surface area to volume is approximately tripled, 0.009 to 0.028. Therefore, the billet is cooled better than the bloom by cooling the surface. In the case of billets, the unsolidified portion in the width direction is 10 mm.
The solidified part is about 130 mm,
It was also found that the width of the unsolidified portion was smaller than that of the unsolidified portion 110 mm and the solidified portion 390 mm of the bloom, and it was not easy to roll down the roll when the side surface was cooled and the temperature was lowered.

【0014】本発明は、以上の検討結果に基づいてなさ
れたものであり、その要旨とするところは、 (1)1辺が140mm以下の角形または直径が140mm 以
下の丸形の断面を持つビレットを軽圧下ロールで軽圧下
しつつ連続鋳造する鋳片軽圧下連続鋳造方法において、
軽圧下ロールと鋳片との隙間に鋳造方向上流側からスプ
レー水を噴射させることを特徴とするビレットの鋳片軽
圧下連続鋳造方法。 (2)ビレットの連続鋳造設備における鋳片軽圧下設備
であって、軽圧下ロールの鋳造方向上流側に、前記軽圧
下ロールと鋳片との間に向けて冷却水を噴射するスプレ
ーノズルを有したことを特徴とするビレットの鋳片軽圧
下設備。である。
The present invention has been made on the basis of the above-mentioned examination results. The gist of the invention is as follows: (1) A billet having a square section with a side of 140 mm or less or a round section with a diameter of 140 mm or less. In the continuous casting method under slab light reduction, in which continuous casting is performed while reducing the pressure with a light reduction roll,
A method for continuously reducing billet cast slab lightly by spraying spray water from the upstream side in the casting direction into the gap between the light roll and the slab. (2) A slab light reduction equipment in a billet continuous casting equipment, having a spray nozzle for injecting cooling water between the light reduction roll and the slab, on the upstream side in the casting direction of the light reduction roll. Billet slab light reduction equipment characterized by the following. It is.

【0015】[0015]

【発明の実施の形態】本方法の特色は以下のとおりであ
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The features of the present method are as follows.

【0016】1.ロール間の鋳片に水をかけるのに比較
して、吹き付けられた水はロールと鋳片の間に入り込む
ことにより、ロールでの鋳片圧下時に鋳片の表面を冷却
する。 2.ロールにより水の圧力が上昇するので、水が沸騰伝
熱せずに、ちょうど遷移域での伝熱状態になり、鋳片の
抜熱効率が急激に向上するために、少ない水量でも鋳片
の表面の温度は低減出来る。特にロールと鋳片の間の水
の圧力が上昇する効果は幅方向では一番圧下したい幅中
央部が際だっており、効率的に圧下できる。 3.ロールと鋳片の間で冷却に使われた水は両横方向に
排出されるが、圧力が高い為に横方向に飛散する。ま
た、冷却水の温度も100℃近くになっており、側面を
冷却する能力が極めて低下しており、鋳片端面の温度の
低下代は少ない。完全に側面の冷却をさける為には水切
り板を設置しても良い。 4.この、冷却方法を適用して、鋳片の軽圧下を実施し
た場合には実施例に示すようにロールの本数を低減して
所定の軽圧下、即ち中心の固相率が0.2から0.6ま
での範囲を10mm圧下しても内部割れが生じない条件
を見いだすことが出来た。内部割れの発生する限界歪み
量はビレットの場合明確では無いが、凝固界面の歪みを
軽減出来たことは内部割れが発生しなかった結果から明
らかになった。
1. The sprayed water enters between the rolls and the slab, as compared to applying water to the slab between the rolls, thereby cooling the surface of the slab when the slab is reduced by the rolls. 2. Since the pressure of water rises due to the roll, the water does not boil and conducts heat, it just enters the transition region and the heat removal efficiency of the slab sharply improves. The temperature can be reduced. In particular, the effect of increasing the pressure of water between the roll and the slab is remarkable in the width center where the user wants to reduce the most in the width direction, and the reduction can be performed efficiently. 3. Water used for cooling between the roll and the slab is discharged in both lateral directions, but scatters in the lateral direction due to high pressure. Further, the temperature of the cooling water is also close to 100 ° C., and the ability to cool the side surface is extremely reduced, so that the temperature of the end face of the slab does not decrease much. A drain board may be provided to completely prevent the cooling of the side surface. 4. When the cooling method is applied and light reduction of the slab is performed, the number of rolls is reduced as shown in the embodiment to reduce the number of rolls to a predetermined value, that is, the solid phase ratio at the center is 0.2 to 0. It was possible to find a condition under which no internal cracks were generated even when the range up to 0.6 was reduced by 10 mm. Although the critical strain at which internal cracking occurs is not clear in the case of billets, the fact that the strain at the solidification interface was reduced was evident from the result of no internal cracking.

【0017】この発明は鋳片サイズの小さいビレットに
おいて本効果は顕著である。即ち、鋳片厚みの大きいブ
ルームにおいては軽圧下時の内部割れは凝固界面歪みが
小さい為に免れている。特に140mm以下の鋳片サイ
ズでは、軽圧下時のロールによる凝固界面の歪みが限界
歪み量と近い値になっていると考えられ、ロールが鋳片
に与える歪みが凝固界面に与える影響が顕著になるため
に、鋳片表面の剛性を向上させて実質の圧延曲率半径を
増加させる効率的冷却方法が効果的である。また、副次
的な効果として、ロール鋳片間を冷却することによりロ
ールへのスケール(鋳片表面に発生した鉄酸化膜)の付
着が著しく軽減され、鋳造中の鋳片表面へのロール表面
模様の転写(ロール疵)や鋳造後のロール表面手入れが
軽減された。
The effect of the present invention is remarkable in a billet having a small slab size. That is, in a bloom having a large slab thickness, internal cracking under light pressure is avoided because the solidification interface strain is small. In particular, at a slab size of 140 mm or less, it is considered that the strain at the solidification interface due to the roll under light pressure is a value close to the critical strain amount, and the effect of the strain exerted on the slab by the roll on the solidification interface is remarkable. Therefore, an effective cooling method for improving the rigidity of the slab surface to increase the actual rolling radius of curvature is effective. As a secondary effect, by cooling the space between the roll slabs, the adhesion of scale (iron oxide film generated on the slab surface) to the rolls is remarkably reduced, and the roll surface on the slab surface during casting is reduced. Transfer of the pattern (roll flaw) and maintenance of the roll surface after casting were reduced.

【0018】[0018]

【実施例】図1には軽圧下の従来法を、図2には本発明
の実験に用いた軽圧下のためのロール2とスプレーノズ
ル3の配置を示す。従来法では350mm間隔でロール
2を7対配置したのに比べて、本発明ではロール2の前
に図中に示す形状のスプレーノズル3を配置して50〜
200l/minの流量の冷却水4を流すことにより、
ロール間隔を700mmに広げることが出来、図中に示
すようにロール2を4対にまで軽減出来た。
FIG. 1 shows a conventional method under light pressure, and FIG. 2 shows the arrangement of a roll 2 and a spray nozzle 3 for light pressure reduction used in experiments of the present invention. In contrast to the conventional method in which seven pairs of rolls 2 are arranged at intervals of 350 mm, in the present invention, the spray nozzles 3 having the shape shown in the figure are arranged before the rolls 2 to 50 to 50.
By flowing the cooling water 4 at a flow rate of 200 l / min,
The roll interval could be expanded to 700 mm, and the roll 2 could be reduced to four pairs as shown in the figure.

【0019】この発明の軽圧下方法で鋳造を行った。溶
鋼成分は炭素濃度がおよそ0.4%から0.8%の高炭
素鋼である。鋳造の結果、130mmの鋳片の鋳造が出
来、偏析粒径も2mm以下と良好であり、軽圧下のロー
ル本数低減に起因する内部割れの生成も無かった。
Casting was performed by the light rolling method of the present invention. The molten steel component is a high carbon steel with a carbon concentration of approximately 0.4% to 0.8%. As a result of the casting, a slab of 130 mm was cast, the segregation particle size was as good as 2 mm or less, and no internal cracks were generated due to the reduction in the number of rolls under light pressure.

【0020】[0020]

【発明の効果】以上述べたとおり、この発明方法によれ
ば、ビレットの連続鋳造機で偏析が良好な鋳片を製造す
る際に、従来かかっていた整備時間を短縮出来た。ま
た、副次的には製品疵も軽減することが出来た。ビレッ
ト鋳造は分塊圧延を省略出来ることから省エネルギーお
よび炭酸ガスの発生を抑制出来、産業界に多いに貢献す
る。
As described above, according to the method of the present invention, the maintenance time conventionally required for producing a cast piece with good segregation by a continuous billet casting machine can be shortened. In addition, the product flaw was also able to be reduced secondarily. Billet casting can save energy and suppress the generation of carbon dioxide gas because it can omit slab rolling, and contributes greatly to the industry.

【図面の簡単な説明】[Brief description of the drawings]

【図1】従来の軽圧下ロール配置を示す概略図である。FIG. 1 is a schematic diagram showing a conventional light roll arrangement.

【図2】本発明による軽圧下ロールは一を示す概略図で
ある。
FIG. 2 is a schematic view showing one example of a light reduction roll according to the present invention.

【符号の説明】 1 鋳片 2 ロール 3 スプレーノズル 4 冷却水 5 ロールと鋳片間の冷却水[Explanation of Signs] 1 slab 2 roll 3 spray nozzle 4 cooling water 5 cooling water between roll and slab

───────────────────────────────────────────────────── フロントページの続き (72)発明者 工藤 紘一 君津市君津1番地 新日本製鐵株式会社君 津製鐵所内 (72)発明者 土岐 正弘 君津市君津1番地 新日本製鐵株式会社君 津製鐵所内 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Koichi Kudo 1 Kimitsu, Kimitsu City Inside the Nippon Steel Corporation Kimitsu Works (72) Inventor Masahiro Toki 1 Kimitsu, Kimitsu City Nippon Steel Corporation Kimitsu Inside the steelworks

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 1辺が140mm以下の角形または直径が
140mm 以下の丸形の断面を持つビレットを軽圧下ロール
で軽圧下しつつ連続鋳造する鋳片軽圧下連続鋳造方法に
おいて、軽圧下ロールと鋳片との隙間に鋳造方向上流側
からスプレー水を噴射させることを特徴とするビレット
の鋳片軽圧下連続鋳造方法。
1. A square or diameter having one side of 140 mm or less.
In a continuous casting method under which a billet having a round cross section of 140 mm or less is lightly rolled down with a light roll, the spray water is sprayed from the upstream side in the casting direction into the gap between the light roll and the slab. A method of continuously casting a billet under light pressure, wherein the method comprises:
【請求項2】 ビレットの連続鋳造設備における鋳片軽
圧下設備であって、軽圧下ロールの鋳造方向上流側に、
前記軽圧下ロールと鋳片との間に向けて冷却水を噴射す
るスプレーノズルを有したことを特徴とするビレットの
鋳片軽圧下設備。
2. A slab light reduction equipment in a billet continuous casting equipment, comprising:
A billet slab light reduction equipment comprising a spray nozzle for spraying cooling water between the light reduction roll and the slab.
JP13487698A 1998-05-18 1998-05-18 Method for continuous light reduction rolling for cast slab of billet and equipment therefor Withdrawn JPH11320060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13487698A JPH11320060A (en) 1998-05-18 1998-05-18 Method for continuous light reduction rolling for cast slab of billet and equipment therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13487698A JPH11320060A (en) 1998-05-18 1998-05-18 Method for continuous light reduction rolling for cast slab of billet and equipment therefor

Publications (1)

Publication Number Publication Date
JPH11320060A true JPH11320060A (en) 1999-11-24

Family

ID=15138564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13487698A Withdrawn JPH11320060A (en) 1998-05-18 1998-05-18 Method for continuous light reduction rolling for cast slab of billet and equipment therefor

Country Status (1)

Country Link
JP (1) JPH11320060A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001205407A (en) * 2000-01-25 2001-07-31 Nippon Steel Corp Method for continuous casting of billet
JP2010046710A (en) * 2008-08-25 2010-03-04 Sumitomo Electric Ind Ltd Copper for wire and method of manufacturing the same
KR101149137B1 (en) 2009-06-26 2012-05-25 현대제철 주식회사 apparatus for removing a scale of continuous casting facilities
CN102527975A (en) * 2012-02-21 2012-07-04 重庆大学 Method for improving segregation and shrinkage of center of square and round billet
CN114734011A (en) * 2022-04-18 2022-07-12 中天钢铁集团有限公司 Continuous casting method for improving internal quality of continuous casting square billet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001205407A (en) * 2000-01-25 2001-07-31 Nippon Steel Corp Method for continuous casting of billet
JP2010046710A (en) * 2008-08-25 2010-03-04 Sumitomo Electric Ind Ltd Copper for wire and method of manufacturing the same
KR101149137B1 (en) 2009-06-26 2012-05-25 현대제철 주식회사 apparatus for removing a scale of continuous casting facilities
CN102527975A (en) * 2012-02-21 2012-07-04 重庆大学 Method for improving segregation and shrinkage of center of square and round billet
CN114734011A (en) * 2022-04-18 2022-07-12 中天钢铁集团有限公司 Continuous casting method for improving internal quality of continuous casting square billet

Similar Documents

Publication Publication Date Title
US5227251A (en) Thin continuous cast plate and process for manufacturing the same
JP2917524B2 (en) Continuous casting of thin slabs
JPH11320060A (en) Method for continuous light reduction rolling for cast slab of billet and equipment therefor
KR20030064758A (en) Method and device for continuous casting and subsequent forming of a steel billet, especially a billet in the form of an ingot or a preliminary section
KR101252645B1 (en) Continuous Casting Method and Continuous Casting Apparatus
JP2006187792A (en) Method for continuously casting molten steel
JP2001191158A (en) Continuous casting method of steel
JP2003275852A (en) Method and apparatus for continuously casting steel
JPS6021150A (en) Production of billet having high quality
JPH07276020A (en) Continuous casting method
JPH09108783A (en) Mold for continuous casting equipment
JPH0673734B2 (en) Method for preventing surface defects on billet slabs
JP3114671B2 (en) Steel continuous casting method
JP4525690B2 (en) Steel continuous casting method
JP4026792B2 (en) Billet continuous casting method
JP2006181583A (en) Method for producing continuously cast slab
JP3055462B2 (en) Continuous casting method
JPH09136145A (en) Method for working recessed parts on peripheral surface for continuously casting cast strip
JP2867894B2 (en) Continuous casting method
JP3314036B2 (en) Continuous casting method and continuous casting device
JPS5997747A (en) Production of ultrathin slab by continuous casting method
JP3225894B2 (en) Continuous casting method
JPH091292A (en) Method for continuously casting thin cast slab
JPH11254002A (en) Production of round steel from large cross sectional stainless steel cast bloom as blank
JP2000005855A (en) Corner cracking preventing method for steel piece

Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20050802