JPS597464A - Method and device for continuous casting of thin steel plate - Google Patents

Method and device for continuous casting of thin steel plate

Info

Publication number
JPS597464A
JPS597464A JP11620582A JP11620582A JPS597464A JP S597464 A JPS597464 A JP S597464A JP 11620582 A JP11620582 A JP 11620582A JP 11620582 A JP11620582 A JP 11620582A JP S597464 A JPS597464 A JP S597464A
Authority
JP
Japan
Prior art keywords
molten steel
casting
rolling
slab
rolls
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
Application number
JP11620582A
Other languages
Japanese (ja)
Inventor
Keimei Onuma
大沼 啓明
Yasuhiro Kakio
垣生 泰弘
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP11620582A priority Critical patent/JPS597464A/en
Publication of JPS597464A publication Critical patent/JPS597464A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0605Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two belts, e.g. Hazelett-process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10Supplying or treating molten metal
    • B22D11/11Treating the molten metal
    • B22D11/114Treating the molten metal by using agitating or vibrating means
    • B22D11/115Treating the molten metal by using agitating or vibrating means by using magnetic fields
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands

Abstract

PURPOSE:To increase the casting amt. of molten steel and to decrease the number of inclusions in an ingot and the local recesses in the surface, by forming a cylindrical shelllike ingot from the molten steel cooled by casting walls then applying rolling down force on the ingot with rolling rolls having gradually decreasing gaps. CONSTITUTION:The molten steel charged into a casting space from a charging nozzle 8 is cooled along circulating bodies 1, 1' and stationary side plates 19, 19' for cooling side surfaces, whereby a solidified shell is formed. The solidified shell grows gradually and moves forward while forming a cylindrical shelllike solidified shell. The solidified shell contg. the unsolidified molten steel 6 remaining in the inside is drawn out from the opening part on the side opposite to the side of the casting space where the molten steel is charged. The ingot grown to such cylindrical shelllike solidified shell receives gradually increasing rolling down force to decrease gradually in the thickness thereof in the stage of passing through the gaps of rolling rolls 9, 9'-18, 18' and is drawn out as an ingot 5 contg. no unsolidified molten steel in the inside and having a desired thickness on the outlet side of the final rolling rolls 18, 18'.

Description

【発明の詳細な説明】 この発明は、薄鋼板の連続鋳造法およびその装置に関し
、と〈忙溶鋼から直接薄鋼板を連続鋳造するかかる技術
にあって凝固殻の圧着機構を採用した点に特色のある方
法およびその装置についての扶案である。
[Detailed Description of the Invention] The present invention relates to a continuous casting method for thin steel sheets and an apparatus therefor, and is characterized in that a solidified shell crimping mechanism is employed in such technology for continuously casting thin steel sheets directly from molten steel. This is a proposal for a certain method and apparatus.

従来、薄鋼板を製造するのには、ます造塊処理によって
鋼塊をつくり、それを分塊圧延して厚さ10()〜80
 (l mmのスラブにしたのち、さらに粗圧延と呼ば
れる圧延を行って8Q mm程度の薄肉鋼板にし、その
後ホットストリップにて] Omm以下の薄銅帯として
いた。
Conventionally, in order to manufacture thin steel sheets, a steel ingot is created by mass ingot processing, and then the ingot is bloomed and rolled to a thickness of 10() to 80%.
(After being made into a slab of 1 mm, it was further rolled into a thin steel plate of about 8Q mm by rough rolling, and then hot-striped into a thin copper strip of 0 mm or less.)

これに対し、従来連続鋳造法によって直接薄肉鋳片を鋳
造してから圧延して薄鋼板とする第1図に示すような技
術があった。この技術は、溶融金属(溶鋼)を注入ノズ
ル101を介して水冷鋳型102内に注入し、四壁に沿
って凝固殻103を生成させたのち、該凝固殻108を
ガイドロール104等を介して厚肉の鋳片を連続的に引
き出し、その後薄肉鋼板にするために粗圧延を行う方法
であるが、次のような問題点があった。すなわち、この
方法にあっては、鋳片の厚さが注入ノズル径の大きさに
よって決まるため、ノズル径は小さい方がよい。ところ
が、ノズル径は注入中にその内部で溶融金属の凝固が起
らないようにするために100mm以上の大きさにする
必要があり、一般lζは150−” 170 mmの太
さのものを使用している。
On the other hand, there is a conventional technique as shown in FIG. 1 in which a thin slab is directly cast by a continuous casting method and then rolled into a thin steel plate. This technique involves injecting molten metal (molten steel) into a water-cooled mold 102 through an injection nozzle 101 to generate a solidified shell 103 along the four walls, and then passing the solidified shell 108 through a guide roll 104 or the like. This method involves continuously drawing thick slabs and then rough rolling them into thin steel plates, but this method has the following problems. That is, in this method, since the thickness of the slab is determined by the diameter of the injection nozzle, the smaller the nozzle diameter is, the better. However, the nozzle diameter needs to be 100 mm or more to prevent the molten metal from solidifying inside during injection, and generally a nozzle with a diameter of 150-" 170 mm is used. are doing.

したがって、鋳造できる鋳片の厚さは最低でも180朋
は有り、通常200〜260 mmの厚さのものになる
。この意味で従来の上述した連続鋳造法で採用する鋳型
は、第1図で示すよう々略画方体形状となシ、薄肉鋳片
の引き抜きが困難な構造になっていた。
Therefore, the thickness of slabs that can be cast is at least 180 mm, and usually 200 to 260 mm thick. In this sense, the mold used in the conventional continuous casting method described above has a substantially rectangular shape as shown in FIG. 1, and has a structure that makes it difficult to draw out thin slabs.

これに対し、従来さらに上記連続鋳造装置を改良するも
のとして第2図に示すようなものがある。
On the other hand, there is a conventional continuous casting apparatus as shown in FIG. 2 which further improves the above-mentioned continuous casting apparatus.

この装置は、所望の鋳片(鋼板)厚みに略等しい間隔で
対向配置したエンドレスな金属ベルトよりなる循環体2
01,201’で構成する釧造空間となる間隙に、その
間隙より小さい溶鋼流路を有するスリット形の注入ノズ
ル202を通じて溶鋼を注入し、注入溶鋼を上記循環体
1,1′に沿わしめた冷却装置808 、808’の冷
却作用によって、該循環体201 、201’に接する
部分から順次に冷却・凝固させ、次第に成長させつつ、
引抜ロール204 、204’にて連続的に引抜き、所
望の厚さの鋳片205を得るようにした構成のものであ
る。この従来装置にあっては、鋳造間隙に溶鋼を供給す
る上記注入ノズル2の溶鋼流路のその厚み方向の大きさ
を、数mm〜数十mmと小さくしなければならないとい
う要請があり、また注入ノズル202先喘における耐火
物厚みも薄くしなければならないため、注入ノズル20
2内で溶鋼が凝固して詰シを住じたり、また耐火物が侵
食されて長時間の連続使用に耐えられないなどの致命的
な欠陥があった。
This device consists of a circulating body 2 consisting of endless metal belts arranged facing each other at intervals approximately equal to the desired slab (steel plate) thickness.
Molten steel is injected into the gap that becomes the chimney space formed by 01 and 201' through a slit-shaped injection nozzle 202 having a molten steel flow path smaller than the gap, and the injected molten steel is cooled along the circulation bodies 1 and 1'. By the cooling action of the devices 808 and 808', the parts that are in contact with the circulating bodies 201 and 201' are sequentially cooled and solidified, and gradually grown.
The cast slab 205 is continuously drawn by drawing rolls 204 and 204' to obtain a slab 205 of a desired thickness. In this conventional device, there is a requirement that the size in the thickness direction of the molten steel flow path of the injection nozzle 2 that supplies molten steel into the casting gap must be small, from several mm to several tens of mm. Since the thickness of the refractory material at the tip of the injection nozzle 202 must also be reduced, the injection nozzle 20
There were fatal flaws such as molten steel solidifying inside the 2nd chamber, causing clogging, and the refractory being eroded, making it impossible to withstand continuous use for long periods of time.

また、さらに進歩した薄鋼板の連続鋳造技術として、循
環体201 、201’下の位置に、既に凝固した状態
もしくは凝固末期の状態の鋳片に対し、最終的な厚み調
整のために圧下金加える方式のものが提案されている。
In addition, as a further advanced continuous casting technology for thin steel sheets, a reduction metal is added to the slab that has already solidified or is in the final stage of solidification at a position below the circulating bodies 201 and 201' for final thickness adjustment. A method has been proposed.

この技術における圧下の趣旨は、鋳片中心部の不純物の
濃化した溶鋼金、その上方のバルク溶鋼中へ絞り出して
鋳片の中心偏析を軽減することを目的としたものである
。しかも、この技術の特徴的力ことは、厚みが側壁形状
の調整によって既に絞られた状態のものであり、圧下を
加える位置が鉛片の最終ん11固部近傍であり、圧下率
が高々数パーセントであることが挙げられる。
The purpose of rolling in this technique is to reduce the center segregation of the slab by squeezing the impurity-concentrated molten steel at the center of the slab into the bulk molten steel above. Moreover, the characteristic force of this technology is that the thickness has already been reduced by adjusting the side wall shape, and the position where the reduction is applied is near the final solid part of the lead piece, and the reduction rate is at most several times. For example, it is a percentage.

本発明は、前述したような従来のスリット型ノズルなど
を用いる薄銅板の連続的な直接鋳造技術のもつ欠点を有
利に克服できる連続鋳造技術の提供を目的とするもので
ある。本発明の連続鋳造法のその要旨構成とするところ
は、一定の距離にわたって鋳造溶鋼を保持するための間
隙を維持しつつ循環する一対の対向配置にかかる循環体
と、それら循環体相互間の両側縁部に位置させた一対の
固定側板とで鋳造空間を構成する薄鋼板連続鋳造装置を
介し、溶鋼から直接薄銅板金鋳造する方法において、上
記鋳造空間内に注入された溶鋼が四壁に接して冷却され
中心部が未凝固の筒殻状の鋳片を生成させた後、その筒
殻状鋳片が成長するその過程に引続き、次第に間隔を狭
める圧延ロールによって鋳片厚みを漸減させる圧下刃を
施すことにより、凝固の完了する終点で所要厚鋼板とな
るようにすること全特徴とする薄鋼板の連続鋳造法にあ
る1、以下にかかる本発明法の詳細について説明する。
An object of the present invention is to provide a continuous casting technique that can advantageously overcome the drawbacks of the continuous direct casting technique of thin copper plates using conventional slit-type nozzles as described above. The continuous casting method of the present invention consists of a pair of circulating bodies arranged opposite each other, which circulate while maintaining a gap for holding the cast molten steel over a certain distance, and both sides of the circulating bodies. In a method of directly casting thin copper sheet metal from molten steel through a thin steel sheet continuous casting device that constitutes a casting space with a pair of fixed side plates located at the edges, the molten steel injected into the casting space contacts the four walls. After cooling to produce a cylindrical slab with an unsolidified center, the thickness of the cylindrical slab is gradually reduced by rolling rolls whose spacing is gradually narrowed as the cylindrical slab grows. 1. The details of the method of the present invention will be explained below.

本発明は、上述のように中心部が未凝固の状態にある筒
殻状に成長した凝固殻を圧下し、冷却凝(至)1にあわ
ぜて漸次部片厚み(鋼板厚み)を調整していく方法であ
るが、この点に関して技術的に考慮され々ければならな
いのは、圧下のために用いる圧延ロール間隙における鋳
片のバルジングによる内部われと、υ、3片(銅板)短
辺形状の変形の2点である。
In the present invention, as described above, the solidified shell that has grown into a cylindrical shell shape with the center part in an unsolidified state is rolled down, and the thickness of the piece (thickness of the steel plate) is gradually adjusted as it cools and solidifies. However, what must be technically considered in this regard is the internal crack caused by the bulging of the slab in the gap between the rolling rolls used for rolling, and the short side shape of the three pieces (copper plate). There are two points regarding the transformation of .

従来の固定モールド連鋳機において、未凝固鋳片を圧下
する場合には、鋳片厚みが約200 mm以上と厚いた
めに、圧延ロールの径は大きくならざるを得す、必然的
にロールピッチも大きくなり、この間のバルジングによ
る内部われは無視し得ない量となる。このような理由に
より、従来の固定モールド連鋳機においては、未凝固鋳
片を圧下して、鋳片厚みを積極的に減少することは実用
化されていない。
When rolling unsolidified slabs using a conventional fixed mold continuous casting machine, the slab thickness is approximately 200 mm or more, so the diameter of the rolling rolls must be increased, and the roll pitch must be increased. The amount of internal cracks due to bulging during this period becomes large and cannot be ignored. For these reasons, in conventional fixed mold continuous casting machines, it has not been put to practical use to roll down the unsolidified slab to actively reduce the thickness of the slab.

この点、本発明法のような圧延ロール間の鋳片バルジン
グによる内部われを、実用上問題ない程度まで低減する
ためには、圧下ロール径を小さくして、ロールピッチを
小さくすることで解決できる。なお、こうした圧下技術
の採用により、ロール圧下量は大径のロールに比して小
さくなるから、最終的に所望の厚さの薄鋼板まで圧延す
るには、初期の鋳片厚みを予め小さくしておく必要があ
る。
Regarding this point, in order to reduce the internal cracking due to slab bulging between rolling rolls as in the method of the present invention to a level that does not pose a practical problem, it is possible to solve this problem by reducing the rolling roll diameter and reducing the roll pitch. . Note that by adopting this rolling reduction technology, the amount of roll reduction is smaller than that of large-diameter rolls, so in order to finally roll a thin steel plate to the desired thickness, it is necessary to reduce the initial thickness of the slab in advance. It is necessary to keep it.

ところが、初期の鋳片厚みを予め従来の半分以下にする
には、同じ生産鼠を8M保するためには、鋳造連関を2
倍以上とする必要があり、それには逆三角形の固定側板
をもつ形式の予め炉辺面を絞る構成の従来固定モールド
式連鋳機では、モールド内での鋳片の支持冷却が困難で
あり、以下に実施例で述べるごとく、本発明のような凝
固殻鋳片と密着し、その凝固殻鋳片の冷却による漸次成
長にあわせて、その厚みを漸減させていく圧下調整技術
の採用が必要条件となる。
However, in order to reduce the initial slab thickness to less than half of the conventional thickness, and to maintain the same production rate of 8M, the casting relationship must be set to 2.
In order to achieve this, it is difficult to support and cool the slab in the mold with a conventional fixed mold type continuous casting machine that has an inverted triangular fixed side plate and has a configuration in which the hearth surface is pre-squeezed. As described in the examples, it is a necessary condition to adopt the reduction adjustment technique of the present invention, which brings the solidified shell slab into close contact with the solidified shell slab and gradually reduces its thickness in accordance with the gradual growth of the solidified shell slab as it cools. Become.

@3図、第4図は、上述した本発明法の実施に好適に用
いられる装置について示すものである。
@ Figures 3 and 4 show an apparatus suitably used for carrying out the above-described method of the present invention.

図示の1,1′は、所望の薄鋼板厚さよシも大きい間隔
で対向する一対のエンドレスに回転する金属ベルト製の
循環体を示し、これは支持ロール7゜71にて一定の距
離にわたって鋳造溶鋼を保持する間隙を形成する。これ
らの循環体1,1′は、その溶鋼と接する面(内壁面)
とは反対側の而(外面)に、冷却装置3,8′を設置し
てあってそれによシ冷却される。それらの循環体l、1
′の両側縁部には、仰j面冷却体用の固定側板111.
19’を配置し、前記循環体1,1′とあわせて、一定
の距離にわたって溶鋼を保持し、凝固せしめるだめの鋳
造空間全形成する。
Reference numerals 1 and 1' in the figure indicate a pair of endlessly rotating metal belt circulation bodies facing each other at a distance larger than the desired thin steel plate thickness, and which are cast over a fixed distance by supporting rolls 7°71. Forms a gap that holds molten steel. These circulating bodies 1, 1' have surfaces (inner wall surfaces) in contact with the molten steel.
Cooling devices 3 and 8' are installed on the opposite side (outer surface), and cooling is achieved thereby. Their circulatory bodies l, 1
Fixed side plates 111. for the J-plane cooling body are provided on both side edges of the
19' is disposed, and together with the circulating bodies 1 and 1', the entire casting space is formed in which the molten steel is held over a certain distance and solidified.

上記循環体I、1′の鋳片引抜き方向には、該鋳造空間
の鋳片短辺面の間隔と略等しいかそれよυも小さい間隔
から、所望のin板厚み相当の間隔にまで漸次その間隔
を狭める複数対の圧延ロール群9,9′〜l 8 、 
] 8’が配置される。本発明装置においては10対の
圧延ロール9,9′〜18,1.8’を配置した。注入
ノズル8より前記鋳造空間に注入された溶鋼は、前記循
環体1.1′および側面冷却用固定側板] 9 、19
’に沿って冷却され、凝固殻が生成し、それが次第に成
長して筒殻状の凝固殻を形造シながら鋳造方向(引抜き
方向)前方へ移動し、内部に未凝固溶鋼6を残存したま
′まの状態で、前記鋳造空間の溶鋼注入側とは反対側の
開口部より抽出される。
In the slab drawing direction of the circulating bodies I and 1', the interval gradually increases from a distance that is approximately equal to or even smaller than the interval between the short sides of the slab in the casting space to an interval corresponding to the desired in-plate thickness. A plurality of pairs of rolling roll groups 9, 9' to l 8 whose distance is narrowed,
] 8' is placed. In the apparatus of the present invention, ten pairs of rolling rolls 9,9' to 18,1.8' were arranged. The molten steel injected into the casting space from the injection nozzle 8 is transferred to the circulating body 1.1' and the fixed side plate for side cooling] 9, 19
', a solidified shell is generated, which gradually grows and moves forward in the casting direction (drawing direction) while forming a cylindrical solidified shell, leaving unsolidified molten steel 6 inside. The raw material is extracted from the opening on the opposite side of the casting space from the molten steel injection side.

この筒殻状凝固殻に成長した鋳片は、その@遣方向前方
に配置された前記圧延ロール9,9′〜18 、18’
の間隙を通過する際に、ill!Il増する圧下刃を受
けてその厚みを漸減させ、最終圧延ロール18 、18
’出側において、内部に未凝固溶鋼を含まず、かつ所望
の厚さを有する鋳片5となって抽出される。なお、圧下
時における1片5の炉辺面の張出し等による鋳片形状の
変化は圧下ロール自体に短辺の張出しを防止するフラン
ジを設けることにより、容易に防止することができる。
The slab that has grown into a cylindrical solidified shell is transferred to the rolling rolls 9, 9' to 18, 18' disposed in front of it in the sending direction.
When passing through the gap, ill! The final rolling rolls 18, 18 gradually reduce their thickness in response to the increasing rolling blades.
'On the outlet side, a slab 5 containing no unsolidified molten steel and having a desired thickness is extracted. Incidentally, changes in the shape of the slab due to the protrusion of the furnace side surface of one piece 5 during rolling can be easily prevented by providing the reduction roll itself with a flange that prevents the short side from protruding.

以下に、本発明連続鋳造装置によって、幅500mm、
厚み10〜60ttLrnの低炭アルミキルド鋼板(組
成; O: 0.085%、Si : tr、 Mn 
:0.44%、P : 0.012%、S : 0.0
18%、A15ot: 0.027%)を毎分1000
1wの速度で鋳造した結果について説明する。従来例と
しては第1図に示した装置によって、同一寸法、同一鋼
種の薄鋼板を同一速度で鋳造した結果について示すもの
である。
Below, by using the continuous casting apparatus of the present invention, a width of 500 mm,
Low carbon aluminum killed steel plate with a thickness of 10 to 60 ttLrn (composition: O: 0.085%, Si: tr, Mn
: 0.44%, P: 0.012%, S: 0.0
18%, A15ot: 0.027%) at 1000 per minute
The results of casting at a speed of 1W will be explained. As a conventional example, the results of casting thin steel plates of the same size and steel type at the same speed using the apparatus shown in FIG. 1 are shown.

本発明による鋳造では、溶鋼流路径φ5Qmmの円形断
面ノズルを用い、循環体1,1′の間隔を1 (10m
mとし、圧延ロール9.9′〜18 、 ] 8’にお
ける圧下率を第1表のように設定して鋳造をおこなった
。また、比較例の従来法による鋳造では厚み] I)m
rn、20mm、80mm、40mm、50mm。
In casting according to the present invention, a circular cross-section nozzle with a molten steel flow path diameter of φ5Q mm is used, and the interval between the circulating bodies 1 and 1' is 1 (10 m
Casting was carried out by setting the rolling reduction ratio at rolling rolls 9.9' to 18, ]8' as shown in Table 1. In addition, in the comparative example of casting by the conventional method, the thickness] I) m
rn, 20mm, 80mm, 40mm, 50mm.

6Q mmの各厚みの鋳片の鋳造に際して、溶鋼流路が
それぞれ、5 mm X 300 mm 、 10 m
m X 800mm、 20 mm X 800 mm
 、 25 am X 800 mm 。
When casting slabs of each thickness of 6Q mm, the molten steel flow path is 5 mm x 300 mm and 10 m, respectively.
m x 800mm, 20mm x 800mm
, 25 am x 800 mm.

80 mm X 60 mmの矩形断面のスリット型ノ
ズルを用いて鋳造をおこなった。いずれの場合も1回の
鋳造あたり、約5000 kgの溶鉛を使用した。
Casting was carried out using a slit-type nozzle with a rectangular cross section of 80 mm x 60 mm. In each case, approximately 5000 kg of molten lead was used per casting.

第5図に、溶鋼注入ノズル1本あたりに鋳造できた溶f
iIAatと鋳片厚みの関係を示す。比較例では鋳造途
中にノズル閉塞が生じて、最大でも700に7の溶鋼し
か鋳造できなかったのに対し、本発明では、いずれの鋳
片厚みに対しても受鋼した約5000ktの溶鋼の全量
が鋳造できた。
Figure 5 shows the molten f cast per molten steel injection nozzle.
The relationship between iIAat and slab thickness is shown. In the comparative example, the nozzle was clogged during casting and only 700 to 7 molten steel could be cast at most, whereas in the present invention, the total amount of molten steel of about 5000 kt received for any slab thickness. was able to be cast.

第6図は、鋳)i’ 1 kgあたりに含まれる非金属
介在物重量と釣片厚みの関係であって、本発明により比
較例に比べて非金属介在物v、枡を1/1o以下に低減
できた。
Figure 6 shows the relationship between the weight of non-metallic inclusions contained per 1 kg of cast iron and the thickness of the fishing piece. was able to be reduced to

第7図は、鋳片表面の湯じわ等の局所的々凹み深さと鋳
片厚みの関係であって、本発明により、鋳片表面の局所
的な凹み深さは、比較例より著しく低減できた。
Figure 7 shows the relationship between the depth of local dents such as hot water wrinkles on the surface of the slab and the thickness of the slab.With the present invention, the depth of local dents on the surface of the slab is significantly reduced compared to the comparative example. did it.

このように本発明によれば、従来法に比べて、溶鉛注入
ノズルの閉塞もしくは溶損によって鋳造不能となるまで
の溶鋼鋳造社を著しく増大できるのみならず、釣片内介
在物個数、ηらびに鋳片の表面の局所的凹みを・も著し
く改善するととができる。
As described above, according to the present invention, compared to the conventional method, it is not only possible to significantly increase the number of molten steel castings until casting becomes impossible due to blockage or melt damage of the molten lead injection nozzle, but also to reduce the number of inclusions in the fishing piece, η It is also possible to significantly improve local depressions on the surface of the slab.

また、本発明の連続鋳造装置JM’frm造方向が鉛型
方向となるように配置し、かつ圧延ロールの数および圧
下率を適当に設定することにより、循環体l、1′およ
び側面冷却用の同市側板] 9 、 I O’によって
構成される鋳造空間の横断面形状を、従来のスラブ連鋳
機と同等にすることができ、このよう・にすることによ
って注湯用タンディツシュおよび注湯ノズルに従来のス
ラブ連鋳機のものをそのまま使用できる利点がある。
In addition, by arranging the continuous casting apparatus JM'fr of the present invention so that the production direction is in the direction of the lead mold, and by appropriately setting the number of rolling rolls and the rolling reduction ratio, it is possible to 9. The cross-sectional shape of the casting space formed by IO' can be made the same as that of a conventional continuous slab caster, and by doing this, the tundish for pouring and the pouring nozzle This has the advantage that conventional continuous slab casting machines can be used as is.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、従来の固定鋳型を用いる薄鋼板の連続鋳造装
置の斜視図、 第2図は、従来のスリット型注入ノズルを使用する薄鋼
板の連続鋳造装置の概略図、 第8図は、本発明の薄鋼板の連続鋳造装置の概略図、 第4図は、第8図のA −A’部の矢視断面図、第5図
は、鋳片厚みと溶鋼鋳造肌の関係を示すグラフ、 第6図は、鋳片厚みと鋳片1 kfあたりに含まれる非
金属介在物重量の関係を示すグラフ、第7図は、鋳片厚
みと鋳片表面の凹み深さの関係を示すグラフである。 1 、 ]’・・・循環体、2・・・スリット型注入ノ
ズル、8.3′・・・冷却装置、4,4′・・・引抜ロ
ール、5・・・鋳片、6・・・溶鋼、7,7′・・・支
持ロール、8・・・注入ノズル、919’・・・A1圧
延ロール、10.10’・・・42圧延ロール、11 
、 l 1’・・・A3圧延ロール、12.12’・・
・A4圧延ロール、18.18’・・・扁5圧延ロール
、14.14’・・・A6圧延ロール、] 5 、 ]
 5’・・・A7圧延ロール、] 6 、 ] 6’・
・・屋8圧延ロール、17.17’−A9圧延ロール、
I 8 、 ] 8’・・・Ago圧延ロール、19 
、19’・・・側面冷却用固?側板。 第1図 第2図 第3図 第5図 新)!74 w <mm) 第6図 麟片/!f N (mm)
Fig. 1 is a perspective view of a continuous casting apparatus for thin steel plates using a conventional fixed mold, Fig. 2 is a schematic diagram of a continuous casting apparatus for thin steel plates using a conventional slit-type injection nozzle, and Fig. 8 is a A schematic diagram of the continuous casting apparatus for thin steel sheets of the present invention; FIG. 4 is a sectional view taken along the line A-A' in FIG. 8; FIG. 5 is a graph showing the relationship between slab thickness and molten steel casting surface. , Figure 6 is a graph showing the relationship between slab thickness and the weight of non-metallic inclusions contained per 1 kf of slab, and Figure 7 is a graph showing the relationship between slab thickness and dent depth on the slab surface. It is. 1, ]'... Circulating body, 2... Slit type injection nozzle, 8.3'... Cooling device, 4, 4'... Drawing roll, 5... Slab, 6... Molten steel, 7, 7'...Support roll, 8...Injection nozzle, 919'...A1 rolling roll, 10.10'...42 rolling roll, 11
, l 1'...A3 rolling roll, 12.12'...
・A4 rolling roll, 18.18'... flat 5 rolling roll, 14.14'... A6 rolling roll,] 5, ]
5'...A7 rolling roll, ] 6, ] 6'.
...Y8 rolling roll, 17.17'-A9 rolling roll,
I 8 , ] 8'... Ago rolling roll, 19
, 19'...For side cooling? side plate. Figure 1 Figure 2 Figure 3 Figure 5 New)! 74 w <mm) Figure 6 麟片/! fN (mm)

Claims (1)

【特許請求の範囲】 L 一定の距離にわたって鋳造溶鋼を保持するための間
隙を維持しつつ循環する一対の対向配置にかかる循環体
と、それら循環体相互間の両側線部に位置させた一対の
固定側板とで鋳造空間を構成する薄鋼板連続鋳造装置を
介し、溶鋼から直接薄鋼板を鋳造する方法において、 上記鋳造空間内に注入された溶鋼が四壁に接して冷却さ
れ中心部が未凝固の筒殻状の鋳片を生成させた後、その
筒殻状鋳片が成長するその過程に引続き、次第に間隔を
狭める圧延ロールによって鋳片厚みを漸減させる圧下刃
を施すことにより、凝固の完了する終点で所要庫鋼板と
なるようにすることを特徴とする薄鋼板の連続鋳造法。 λ 一定の距離にわたって鋳造溶鋼を保持するための間
隙を維持しつつ循環する一対の対向配置にかかる循環体
と、それら循環体相互間の両側縁部に位置させた一対の
固定側板とで鋳造空間を構成する薄鋼板連続鋳造装置に
おいて、 上記循環体の送り方向の端部に隣接する位置よシ、対向
する一対のロールよシなる圧延ロール対を凝固殻引抜き
方向を指向して多数列設し、かつ該圧延ロールの対向す
るロール間隔を上記送り方向に向って漸次に狭まるよう
にするとともにその終点部では鋼板厚に略等しい間隔と
がるように配置する一方、上記送り方向で相隣る各圧延
ロール間間隙を小径ロールの組合わせで小さくしたこと
を特徴とする薄鋼板の連続鋳造装置。
[Scope of Claims] L A pair of circulating bodies disposed opposite each other that circulate while maintaining a gap for holding cast molten steel over a certain distance, and a pair of circulating bodies located on both side lines between the circulating bodies. In a method of directly casting thin steel plates from molten steel through a continuous thin steel plate casting device that forms a casting space with a fixed side plate, the molten steel injected into the casting space is cooled in contact with the four walls, leaving the center unsolidified. After producing a cylindrical slab, solidification is completed by applying a rolling blade that gradually reduces the thickness of the slab using rolling rolls that gradually narrow the interval during the process of growth of the cylindrical slab. A method for continuous casting of thin steel sheets, characterized in that the steel sheets are turned into the required steel sheets at the end point of casting. λ A casting space is created by a pair of opposing circulating bodies that circulate while maintaining a gap to hold the cast molten steel over a certain distance, and a pair of fixed side plates located on both side edges between the circulating bodies. In the thin steel sheet continuous casting apparatus constituting the apparatus, a large number of pairs of rolling rolls, such as a pair of opposing rolls, are arranged in a row at a position adjacent to the end of the circulating body in the feeding direction, oriented in the solidified shell drawing direction. , and the spacing between the opposing rolls of the rolling rolls is gradually narrowed in the feeding direction, and the distance between the opposing rolls is tapered at the end point of the rolling rolls, and the distance between the rolling rolls is approximately equal to the thickness of the steel plate, A continuous casting device for thin steel sheets, characterized in that the gap between each rolling roll is reduced by a combination of small diameter rolls.
JP11620582A 1982-07-06 1982-07-06 Method and device for continuous casting of thin steel plate Pending JPS597464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11620582A JPS597464A (en) 1982-07-06 1982-07-06 Method and device for continuous casting of thin steel plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11620582A JPS597464A (en) 1982-07-06 1982-07-06 Method and device for continuous casting of thin steel plate

Publications (1)

Publication Number Publication Date
JPS597464A true JPS597464A (en) 1984-01-14

Family

ID=14681438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11620582A Pending JPS597464A (en) 1982-07-06 1982-07-06 Method and device for continuous casting of thin steel plate

Country Status (1)

Country Link
JP (1) JPS597464A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62152776U (en) * 1986-03-20 1987-09-28
JPH04224003A (en) * 1990-12-25 1992-08-13 Nippon Steel Corp Method and apparatus for casting and rolling thin slab
WO2013000841A1 (en) * 2011-06-29 2013-01-03 Sms Siemag Ag Method for strand casting a cast strand, and strand casting system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53102225A (en) * 1977-02-18 1978-09-06 Ishikawajima Harima Heavy Ind Continuous casting method and its device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53102225A (en) * 1977-02-18 1978-09-06 Ishikawajima Harima Heavy Ind Continuous casting method and its device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62152776U (en) * 1986-03-20 1987-09-28
JPH0438860Y2 (en) * 1986-03-20 1992-09-10
JPH04224003A (en) * 1990-12-25 1992-08-13 Nippon Steel Corp Method and apparatus for casting and rolling thin slab
WO2013000841A1 (en) * 2011-06-29 2013-01-03 Sms Siemag Ag Method for strand casting a cast strand, and strand casting system

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