JPH0760411A - Side gate for continuous casting of broad and thin slab - Google Patents
Side gate for continuous casting of broad and thin slabInfo
- Publication number
- JPH0760411A JPH0760411A JP21278793A JP21278793A JPH0760411A JP H0760411 A JPH0760411 A JP H0760411A JP 21278793 A JP21278793 A JP 21278793A JP 21278793 A JP21278793 A JP 21278793A JP H0760411 A JPH0760411 A JP H0760411A
- Authority
- JP
- Japan
- Prior art keywords
- continuous casting
- base member
- ceramic
- drum
- end part
- 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
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- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、双ドラム式連続鋳造装
置等の広幅薄肉鋳片の連続鋳造に用いられるサイド堰に
関する。より具体的にはこのサイド堰において、金属ケ
ースに不定形耐火物、ベース部材を介して植設されるセ
ラミックス当板の構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side dam used for continuous casting of wide and thin slabs such as twin-drum type continuous casting equipment. More specifically, the present invention relates to the structure of ceramic side plates which are planted in a metal case through an amorphous refractory and a base member in the side dam.
【０００２】[0002]
【従来の技術】従来から一般に知られている例えば双ド
ラム式連続鋳造装置を用いた連続鋳造においては、図２
に示されるように、回転する一対の冷却ドラムＲａ、Ｒ
ｂとこのドラムの両端面に当接されるサイド堰Ｓａ，Ｓ
ｂによって形成される移動鋳型内に、タンディッシュ内
から内ノズルａ、外ノズルｂを介して溶湯ｅを供給し、
移動鋳型内に所定レベルの湯溜り部ｐをつくりつつ、冷
却ドラムで冷却して凝固シェルを形成し、この凝固シェ
ルを一対の冷却ドラムの最接近部に形成されるロ−ル・
ギャップにおいて圧接・一体化して広幅薄肉鋳片ｃを得
るようになっている。2. Description of the Related Art In continuous casting using a twin drum type continuous casting apparatus which has been conventionally known, for example, as shown in FIG.
, A pair of rotating cooling drums Ra, R
b and side weirs Sa, S abutting on both end faces of this drum
The molten metal e is supplied from the inside of the tundish through the inner nozzle a and the outer nozzle b into the moving mold formed by b.
While forming a pool p of a predetermined level in the moving mold, it is cooled by a cooling drum to form a solidified shell, and the solidified shell is formed at the closest position of a pair of cooling drums.
A wide and thin slab c is obtained by pressure contact and integration at the gap.
【０００３】このサイド堰Ｓａ、Ｓｂは図３に示される
ように冷却ドラムＲａ，Ｒｂ間の溶湯ｅ（ハッチングを
施した部分）をシールするために必要不可欠なものであ
り、一般にはこのようなサイド堰は例えば実開昭６３−
９０５４８号に開示されているように、図４のように構
成されている。The side dams Sa and Sb are indispensable for sealing the molten metal e (hatched part) between the cooling drums Ra and Rb as shown in FIG. The side weir is, for example, Shoukaisho 63-
As disclosed in Japanese Patent No. 90548, the configuration is as shown in FIG.
【０００４】即ち、このサイド堰１は、枠板２と底板３
とからなるサイド堰ケース４内に、断熱材５と、この断
熱材に植設されたベース部材と、このベース部材に植設
されたヒータ８を内蔵したセラミックスス層７が収容さ
れており、このセラミックス層が冷却ドラムの両端面に
直接接触して溶湯をシールする。That is, the side dam 1 includes a frame plate 2 and a bottom plate 3.
A heat insulating material 5, a base member planted in the heat insulating material, and a ceramics layer 7 having a heater 8 embedded in the base member are housed in a side dam case 4 composed of This ceramic layer directly contacts both end faces of the cooling drum to seal the molten metal.
【０００５】即ち、セラミックス層７は、鋳造中に回転
する冷却ドラムの両端面に密着して摺動するので、形状
的には該ドラム両端面に十分に適合する面を形成すると
ともに、材質的には適度の潤滑性を有することが必要で
ある。That is, since the ceramics layer 7 slides in close contact with both end faces of the rotating cooling drum during casting, the ceramics layer 7 has a surface which is sufficiently conformable to both end faces of the drum and has a material property. Is required to have a proper lubricity.
【０００６】一方、サイド堰への地金付着を防止するた
めに、鋳造開始前に、このサイド堰の加熱を行なうが、
この加熱の際に、サイド堰の各部に温度勾配を生ずるこ
とが多く、サイド堰が熱変形することが多い。この熱変
形した状態のサイド堰を冷却ドラム端面に押し当てる
と、このドラム端面とサイド堰間に間隙が不均一に生じ
て、溶湯漏れ、鋳バリ発生等の原因になる。On the other hand, in order to prevent the adhesion of metal to the side weir, the side weir is heated before the start of casting.
During this heating, a temperature gradient is often generated in each part of the side dam, and the side dam is often thermally deformed. When the side weir in the heat-deformed state is pressed against the end surface of the cooling drum, gaps are unevenly formed between the end surface of the drum and the side weir, which causes leakage of molten metal, occurrence of casting burrs, and the like.
【０００７】この熱変形した状態のサイド堰とドラム端
面との間の隙間発生を抑制するには、サイド堰の熱変形
を外力によって抑え込みつつ鋳造を行う方法、或いは、
鋳造開始前にドラムを回転させ、サイド堰のセラミック
ス層をドラム端面との摺動であらかじめ摩滅させて両者
間に適合面を形成してから鋳造することが考えられる。In order to suppress the generation of a gap between the side dam in the thermally deformed state and the drum end surface, a method of casting while suppressing the thermal deformation of the side dam by an external force, or
It is conceivable that the drum is rotated before the start of casting, and the ceramic layer of the side dam is abraded in advance by sliding with the end face of the drum to form a matching surface between the two, and then casting is performed.
【０００８】従来、外力による方法として、（１）サイ
ド堰の押し付け力を著しく大きくする方法、またセラミ
ックス層を摺動摩滅させる方法としては、（２）サイド
堰のセラミックス層全体を軟質化してセラミックス層全
体の摺動摩滅を促進する方法、あるいは（３）サイド堰
のセラミックス層を熱変形で突出する部分だけを軟質化
する方法が採用されている。Conventionally, as a method using an external force, (1) a method of remarkably increasing the pressing force of the side weir, and a method of sliding and abrading the ceramic layer, (2) softening the entire ceramic layer of the side weir to obtain a ceramic A method of promoting sliding wear of the entire layer or (3) a method of softening only the portion of the side dam projecting the ceramic layer by thermal deformation is used.
【０００９】しかし、上記（１）、（２）の方法では、
いずれもセラミックス層全体の摩滅が急速に進むために
長時間鋳造を継続することができない。また上記（３）
の方法では、例えば、セラミックス層７を平面的に２種
類の領域に分け、サイド堰の熱変形によって突出する中
央領域７ａには軟質セラミックスを用い、周辺領域７ｂ
には硬質セラミックスを用いている。However, in the above methods (1) and (2),
In both cases, the wear of the entire ceramic layer progresses rapidly, so that casting cannot be continued for a long time. In addition, (3) above
In this method, for example, the ceramic layer 7 is divided into two types of areas in a plane, soft ceramics is used for the central area 7a protruding by thermal deformation of the side dam, and the peripheral area 7b is used.
Hard ceramics are used for.
【００１０】しかしこの場合には、潤滑性を持つ軟質領
域が摩滅して、ドラム端面との適合性が得られる前に、
硬質領域がドラム端面と接触し始めるために潤滑性が低
下し、鋳片端部の横割れの発生原因となるといった問題
があった。In this case, however, before the lubricious soft region is worn away and compatibility with the drum end surface is obtained,
Since the hard region begins to contact the end surface of the drum, the lubricity deteriorates, which causes a problem of lateral cracking at the end of the cast piece.
【００１１】[0011]
【発明が解決しようとする課題】本発明は、冷却ドラム
と接触するセラミックス層（当板）の構造を改善するこ
とによって、ドラム端面とサイド堰間の隙間発生を防止
して、溶湯のシール性を確保するとともに、十分な耐性
を確保して長時間鋳造を可能にしたサイド堰構造を提供
するものである。SUMMARY OF THE INVENTION The present invention improves the structure of the ceramic layer (contact plate) that contacts the cooling drum to prevent the occurrence of a gap between the drum end surface and the side weir, and to prevent the molten metal from sealing. And a side weir structure that secures sufficient durability and enables long-time casting.
【００１２】[0012]
【課題を解決するための手段】本発明は、回転する一対
の冷却ドラムの両端面に当接されこの一対の冷却ドラム
との間に移動鋳型を形成する広幅薄肉鋳片の連続鋳造用
サイド堰であって、金属ケースに収容された不定形耐火
物と、この不定形耐火物に植設されたベース部材と、こ
のべ−ス部材に冷却ドラム端面と摺動するごとく植設さ
れたセラミックス当板と、上記ベース部材に埋設された
ヒータとからなり、上記セラミックス当板の上端部を自
己潤滑性に優れたＢＮ含有量の高い材料で、下端部をガ
ラスを含みクリープ変態能に優れた材料でそれぞれ形成
し、中間部を耐熱衝撃性と耐摩耗性に優れた材料を張り
合わせて形成したことを特徴とする広幅薄肉鋳片の連続
鋳造用サイド堰である。SUMMARY OF THE INVENTION The present invention is directed to a side weir for continuous casting of wide thin cast slabs which abuts on both end faces of a pair of rotating cooling drums to form a moving mold between the pair of cooling drums. The amorphous refractory housed in the metal case, the base member planted in the irregular refractory, and the ceramic member planted in the base member so as to slide on the end surface of the cooling drum. A plate and a heater embedded in the base member, and the upper end of the ceramic contact plate is made of a material having a high BN content and having excellent self-lubricating properties, and the lower end is made of a material having glass and having excellent creep transformation ability. The side weir for continuous casting of wide thin cast slabs, characterized in that the intermediate portions are formed by laminating materials having excellent thermal shock resistance and wear resistance.
【００１３】[0013]
【作用】本発明においては、サイド堰のセラミックス当
板の上端部を自己潤滑性に優れたＢＮ質材料で形成して
いるので、このＢＮ質材料の微粉末がセラミックス当板
の中間部を形成する耐熱衝撃性、耐摩耗性にすぐれた材
料とドラム端面間に入り込み、この微粉末効果でセラミ
ックス当板の中間部の摩耗到達を遅延させることがで
き、その寿命を大幅延長できる。In the present invention, since the upper end of the ceramic dam plate of the side dam is formed of the BN material having excellent self-lubricating property, the fine powder of the BN material forms the middle part of the ceramic dam plate. The material which has excellent thermal shock resistance and wear resistance and the end surface of the drum are inserted, and the fine powder effect can delay the arrival of wear at the middle portion of the ceramic contact plate, and the life thereof can be greatly extended.
【００１４】またセラミックス当板の下端部をガラスを
含みクリープ変態能に優れた材料で形成しているので高
温下でのガラス化効果（滑り効果）で、一対のドラムの
圧着で滲み出そうとする半凝固鋳片を適度に抑えるとと
もに、このサイド堰下端部の欠け落ち現象を防止するこ
とができ、鋳片の良好な側端形状を長時間に亘って安定
維持し、連続鋳造操業を安定化し、均質な鋳片を鋳造す
ることができる。Further, since the lower end portion of the ceramic contact plate is made of a material containing glass and having an excellent creep transformation ability, the vitrification effect (sliding effect) at a high temperature causes an exudation by pressing a pair of drums. The amount of semi-solid cast slab that is used can be suppressed appropriately, and the chipping phenomenon at the lower end of this side dam can be prevented, and the good side edge shape of the slab can be maintained stably for a long time, thus stabilizing the continuous casting operation. It is possible to cast a homogeneous slab.
【００１５】[0015]
【実施例】以下に本発明を図１（ａ）〜（ｂ）に示す実
施例に基づいて説明する。本発明のサイド堰９は、金属
ケース１０と、この金属ケースに収容された不定形耐火
物１１と、この不定形耐火物に植設されたベース部材１
２と、このベース部材に冷却ドラムＲａ，Ｒｂの端面と
摺動するごとく植設されたＹ字型のセラミックス当板１
３と、上記ベース部材に埋設されたヒータ１４とからな
っている。EXAMPLES The present invention will be described below based on the examples shown in FIGS. 1 (a) and 1 (b). The side weir 9 of the present invention includes a metal case 10, an amorphous refractory 11 housed in the metal case, and a base member 1 planted in the irregular refractory.
2 and a Y-shaped ceramic contact plate 1 which is planted on the base member so as to slide on the end faces of the cooling drums Ra and Rb.
3 and a heater 14 embedded in the base member.
【００１６】上記セラミックス当板１３は、上端部１３
ａと中間部１３ｂと下端部１３ｃの３つの部分からなっ
ており、上端部は例えば、自己潤滑性にすぐれたＢＮを
主成分とする耐火物からなり、ホットプレスにより下記
中間部の厚みより僅かに厚めに成型されたものである。
ここで上端部とは通常操業時のメニスカス位置より上部
の面積比率で５〜４０％（対セラミックス当板面積）の
範囲を示す。なお、ここで言う自己潤滑性に優れた耐火
物とは、耐火性を有するとともに、固体潤滑剤として優
れた機能を有するものであり、ＢＮを７０％以上含み、
ドラム端面と摺動して、この摺動面において自ら摩滅し
固体潤滑性を有する微粉末を発生するものである。ＢＮ
が７０％以下では適度の固体潤滑性を発現しない。（こ
こで言う固体潤滑性の尺度としてトルク値から算出した
摩擦係数μが用いられ、ここではμが０．４以下のもの
を用いることが好ましい。）The ceramic contact plate 13 has an upper end 13
a, an intermediate portion 13b, and a lower end portion 13c, and the upper end portion is made of, for example, a refractory material mainly composed of BN having excellent self-lubricating property. It is a thickly molded product.
Here, the upper end portion refers to a range of 5 to 40% (with respect to the ceramic striking plate area) as an area ratio above the meniscus position during normal operation. In addition, the refractory having excellent self-lubricating property as referred to herein has fire resistance and also has an excellent function as a solid lubricant, and contains 70% or more of BN,
It slides on the end surface of the drum, and wears itself on this sliding surface to generate fine powder having solid lubricity. BN
Of 70% or less does not exhibit an appropriate solid lubricity. (The friction coefficient μ calculated from the torque value is used as a measure of the solid lubricity here, and it is preferable that μ is 0.4 or less here.)
【００１７】中間部は例えば、Ｓｉ3 Ｎ4 −ＢＮ−Ａｌ
Ｎ質耐火物からなり、反応焼結により形成されたもの
で、耐熱衝撃性および耐摩耗性に優れたものである。こ
こで中間部とはメニスカス位置の下部で下記下端部の上
端までの範囲４０〜７５％の範囲を示す。The intermediate portion is, for example, Si 3 N 4 --BN--Al.
It is made of N-type refractory, formed by reaction sintering, and has excellent thermal shock resistance and abrasion resistance. Here, the middle part indicates a range of 40 to 75% from the lower part of the meniscus position to the upper end of the following lower end part.
【００１８】Ｓｉ3 Ｎ4 −ＢＮ−ＡｌＮ質耐火物として
はＢＮを３０〜５０％，ＡｌＮを５〜１５％含み，残部
Ｓｉ3 Ｎ4 を３０〜６５％，からなる耐火物が、適度の
耐熱衝撃性を有しまたドラムの耐摩耗性とのバランス
（ドラムより耐摩耗性が適度に低いことが好ましい。）
上、適度の耐摩耗性を有しており、適性が高いものと言
える。As the Si 3 N 4 -BN-AlN refractory material, a refractory material containing 30 to 50% BN, 5 to 15% AlN, and the balance 30 to 65% Si 3 N 4 is a suitable refractory material. It has thermal shock resistance and balance with the wear resistance of the drum (it is preferable that the wear resistance is appropriately lower than that of the drum).
In addition, it has moderate wear resistance and can be said to have high suitability.
【００１９】下端部は例えば、Ｓｉ3 Ｎ4 −ＢＮ質耐火
物で、ＣａＯ−Ｂ2 Ｏ3 質のガラス化成分を含み、ホッ
トプレスにより成型されたもので、クリープ変態能に優
れたものである。ここで下端部とは最下端から面積比率
（対セラミックス当板面積）で約２０〜３０％の範囲を
示す。The lower end is, for example, a Si 3 N 4 -BN-based refractory material, which contains CaO-B 2 O 3 -based vitrifying component and is molded by hot pressing, and has excellent creep transformation ability. is there. Here, the lower end part indicates a range of about 20 to 30% in area ratio (to ceramic contact plate area) from the lowermost end.
【００２０】なお、ここで言うクリープ変態能に優れる
とは、耐火物組織内に粒界を形成するガラス化成分が１
０００〜１２００℃の温度領域で、適度に軟化して外力
に対する滑り性を発現し適度に変形し破断し難い性質を
有することを意味する。It is to be noted that the term "excellent creep transformability" as used herein means that the vitrification component forming grain boundaries in the refractory structure is 1
In the temperature range of 000 to 1200 ° C, it means that it has a property that it is appropriately softened to exhibit slipperiness against external force, is appropriately deformed, and is not easily broken.
【００２１】このクリープ変態能の尺度は、一定の荷重
の下で時間の経過とともに材料が変形する速度で表さ
れ、ここでは温度１４００℃、荷重２kgf/mm2 にて、１
０-4〜１０-2領域のものを用いることが好ましい。This scale of creep transformation capability is expressed by the rate of deformation of a material with time under a constant load, and here, at a temperature of 1400 ° C. and a load of 2 kgf / mm 2 ,
It is preferable to use one having a region of 0 −4 to 10 −2 .
【００２２】このような条件を満足する耐火物として
は、ＢＮを５０〜７０％、Ｓｉ3 Ｎ4を２０〜５０％を
含み，残部がガラス化成分でＣａＯ，Ｂ2 Ｏ3 からなる
耐火物が、適度の耐熱衝撃性、耐摩耗性とともに、適度
のクリープ変形能を発現させるものとして、適性の高い
ものである。As a refractory material satisfying such conditions, a refractory material containing 50 to 70% of BN and 20 to 50% of Si 3 N 4 and the balance being CaO and B 2 O 3 as vitrifying components. However, it is highly suitable as a material that exhibits appropriate thermal shock resistance and wear resistance as well as appropriate creep deformability.
【００２３】ガラス化成分が３％以下ではクリープ変形
能を発現しないし、２０％以上では軟化過剰になり半凝
固鋳片の滲み出しを抑えることができずサイド堰として
の機能を失ってしまう。When the vitrification component is 3% or less, creep deformability is not exhibited, and when it is 20% or more, softening becomes excessive, so that exudation of the semi-solidified slab cannot be suppressed and the function as a side dam is lost.
【００２４】これらのセラミックス当板を構成する各部
はそれぞれ一体化されたものでも、分割片を組み立てた
ものでも良い。また各部間あるいは各部内での分割片間
は接着してもよいが、熱膨張に対する柔軟性を得るため
にも、無接着にして伸縮を拘束しないことが好ましい。The respective parts constituting these ceramic contact plates may be integrated with each other or may be assembled with divided pieces. Further, although it is possible to bond the respective parts or the divided pieces within each part, it is preferable that the parts are not adhered and the expansion and contraction are not restricted in order to obtain flexibility against thermal expansion.
【００２５】このようにして構成された本発明のサイド
堰を、図３に示すような双ドラム式連続鋳造装置のサイ
ド堰として用いて、連続鋳造操業を実施し、幅１２００
mm，厚さ５mmの広幅薄肉鋳片を鋳造した。The side weir of the present invention thus constructed is used as a side weir of a twin drum type continuous casting apparatus as shown in FIG.
A wide and thin slab with a thickness of 5 mm and a thickness of 5 mm was cast.
【００２６】その結果、本サイド堰のセラミックス当板
の上端部は、回転する冷却ドラム端面との摺動により、
短時間で中間部表面レベルまで摩滅し、そこで発生した
微粉末が中間部の表面と冷却ドラム端面間に入り込み固
体潤滑剤として作用し、特に中間部の摩耗が抑制され、
また下端部が長時間に亘って欠損を生ずることがなく、
長時間に亘って、形状の良好な鋳片を安定的に鋳造する
ことがてきた。As a result, the upper end of the ceramic contact plate of the side dam is slid on the end surface of the rotating cooling drum,
It wears down to the surface level of the intermediate part in a short time, the fine powder generated there enters between the surface of the intermediate part and the end surface of the cooling drum, and acts as a solid lubricant, in particular, the wear of the intermediate part is suppressed,
Also, the lower end will not be damaged for a long time,
It has been possible to stably cast a slab having a good shape for a long time.
【００２７】これに対して、セラミックス当板の全部分
を、反応焼結により形成したＳｉ3Ｎ4 −ＢＮ−ＡｌＮ
質の耐火物で形成した従来のサイド堰を用いた場合で
は、下端部が短時間で欠損して、鋳片側端部の形状不良
を生じ、また中間部が短時間で摩耗し、連続鋳造操業の
続行が不能になった。On the other hand, the entire portion of the ceramic plate is Si 3 N 4 -BN-AlN formed by reaction sintering.
When a conventional side weir made of high-quality refractory is used, the lower end part is damaged in a short time, the shape of the end part on the slab side becomes defective, and the middle part wears out in a short time. It became impossible to continue.
【００２８】本発明のサイド堰を用いれば前記従来のサ
イド堰を用いた場合に比し、そのセラミックス当板の寿
命を数倍に延長することができた。By using the side weir of the present invention, the life of the ceramic backing plate could be extended several times as compared with the case of using the conventional side weir.
【００２９】なお、本発明は上記の実施例に限定される
ものではない。例えばセラミックス当板の上端部を形成
する耐火物としては、ＷＳ，ＭｏＳ2 、Ｃ等も適性を有
する。また、中間部を形成する耐火物としてはＺｒＢ2
−ＢＮ、Ａｌ2 Ｏ3 −Ｃｒ2Ｏ3 −Ｚｒ2 等も適性があ
る。さらに、下端部を形成する耐火物としてはホットプ
レスで焼結させたＡｌＮ−ＢＮ等も適性がある。The present invention is not limited to the above embodiment. For example, WS, MoS 2 , C, etc. are also suitable as the refractory material forming the upper end portion of the ceramic contact plate. Further, as a refractory material forming the middle portion, ZrB 2
-BN, there are Al 2 O 3 -Cr 2 O 3 -Zr 2 etc. Also aptitude. Further, as a refractory material forming the lower end portion, AlN-BN sintered by hot pressing or the like is also suitable.
【００３０】したがって、冷却ドラム条件（端面の材
質、寸法、形状等）、サイド堰条件（構造、寸法、形
状、材料の組み合わせ等）、連続鋳造の操業条件（温
度、速度、寸法等）に応じて、これらの条件を選定、組
み合わせて用いるものである。Therefore, depending on the cooling drum condition (end face material, size, shape, etc.), side dam condition (structure, size, shape, material combination, etc.), continuous casting operation condition (temperature, speed, size, etc.) Then, these conditions are selected and used in combination.
【００３１】[0031]
【発明の効果】本発明においては、本発明においては、
サイド堰のセラミックス当板の上端部を自己潤滑性に優
れたＢＮ質材料で形成しているので、このＢＮ質材料の
微粉末がセラミックス当板の中間部を形成する耐熱衝撃
性、耐摩耗性にすぐれた材料とドラム端面間に入り込
み、この微粉末効果でセラミックス当板の中間部の摩耗
到達を遅延させることができ、その寿命を大幅延長でき
る。According to the present invention, in the present invention,
Since the upper end of the ceramic dam plate of the side dam is made of BN-based material having excellent self-lubricating property, the fine powder of this BN-based material forms the middle part of the ceramic dress plate, which is heat shock resistance and wear resistance. The fine powder effect makes it possible to delay the arrival of wear in the middle portion of the ceramics contact plate, and greatly extend the service life thereof.
【００３２】またセラミックス当板の下端部をガラスを
含みクリープ変態能に優れた材料で形成しているので、
高温下でのガラス化効果で、このサイド堰下端部の欠け
落ち現象を防止することができ、一対のドラムの圧着で
滲み出そうとする半凝固鋳片を適度に抑え、その側端形
状を長時間に亘って安定維持し、連続鋳造操業を安定化
し、均質な鋳片を鋳造することができる。Further, since the lower end portion of the ceramic contact plate is formed of a material having excellent creep transformation ability including glass,
Due to the vitrification effect at high temperatures, the phenomenon of chipping off at the lower end of the side dam can be prevented, and the semi-solid slab that is about to ooze out by crimping a pair of drums is appropriately suppressed, and the side end shape is reduced. It can be stably maintained for a long time, the continuous casting operation can be stabilized, and a homogeneous slab can be cast.
【図１】本発明の実施例を示す説明図であり、（ａ）図
は湯溜り部側から見たサイド堰の正面説明図、（ｂ）図
は（ａ）図の側断面説明図。1A and 1B are explanatory views showing an embodiment of the present invention, in which FIG. 1A is a front explanatory view of a side weir seen from the side of a basin, and FIG. 1B is a side sectional explanatory view of FIG. 1A.
【図２】本発明を実施する双ドラム式の広幅薄肉鋳片の
連続鋳造装置例を示す立面説明図。FIG. 2 is an elevational explanatory view showing an example of a twin-drum type continuous casting apparatus for a wide and thin cast piece according to the present invention.
【図３】（ａ）図は、本発明を実施する双ドラム式の広
幅薄肉鋳片の連続鋳造装置例におけるサイド堰配置状態
を示す平面説明図。（ｂ）図は、（ａ）図の正面説明
図。FIG. 3A is an explanatory plan view showing a side weir arrangement state in an example of a twin drum type wide-width thin cast slab continuous casting apparatus embodying the present invention. (B) figure is front explanatory drawing of (a) figure.
【図４】従来の双ドラム式連続鋳造装置例におけるサイ
ド堰例を示し、（ａ）図は湯溜り部側から見た正面説明
図、（ｂ）図は（ａ）図のＡａ−Ａｂ矢視断面説明図。FIG. 4 shows an example of a side weir in an example of a conventional twin-drum type continuous casting apparatus, FIG. 4 (a) is a front explanatory view seen from the basin side, and FIG. 4 (b) is an arrow Aa-Ab in FIG. 4 (a). FIG.
１ サイド堰 ２ 枠板 ３ 底板 ４ サイド堰ケース ５ 耐火物 ６ ベース材 ７ セラミックス層 ７ａ 中央領域（セラミックス層） ７ｂ 周辺領域（セラミックス層） ８ ヒータ ９ サイド堰 １０ 金属ケース １１ 不定形耐火物 １２ ベース部材 １３ セラミックス当板 １３ａ 上端部（セラミックス当板） １３ｂ 中間部（セラミックス当板） １３ｃ 下端部（セラミックス当板） １４ ヒータ ａ 内ノズル ｂ 外ノズル ｃ 鋳片 ｅ 溶湯 Ｍ メニスカス ｐ 湯溜り部 Ｒａ，Ｒｂ 冷却ドラム Ｓａ，Ｓｂ サイド堰 1 side weir 2 frame plate 3 bottom plate 4 side weir case 5 refractory 6 base material 7 ceramics layer 7a central region (ceramics layer) 7b peripheral region (ceramics layer) 8 heater 9 side weir 10 metal case 11 amorphous refractory 12 base Member 13 Ceramics contact plate 13a Upper end part (ceramics contact plate) 13b Middle part (ceramics contact plate) 13c Lower end part (ceramics contact plate) 14 Heater a Inner nozzle b Outer nozzle c Cast piece e Molten metal M Meniscus p Melt pool Ra, Rb cooling drum Sa, Sb side weir
Claims (1)
接されこの一対の冷却ドラムとの間に移動鋳型を形成す
る広幅薄肉鋳片の連続鋳造用サイド堰であって、金属ケ
ースに収容された不定形耐火物と、この不定形耐火物に
植設されたベ−ス部材と、このべ−ス部材に冷却ドラム
端面と摺動するごとく植設されたセラミックス当板と、
上記ベース部材に埋設されたヒータとからなり、上記セ
ラミックス当板の上端部を自己潤滑性に優れたＢＮ含有
量の高い材料で、下端部をガラスを含みクリープ変態能
に優れた材料でそれぞれ形成し、中間部を耐熱衝撃性と
耐摩耗性に優れた材料を張り合わせて形成したことを特
徴とする広幅薄肉鋳片の連続鋳造用サイド堰。1. A side dam for continuous casting of wide thin cast slabs which is in contact with both end faces of a pair of rotating cooling drums and forms a moving mold between the pair of cooling drums, and is housed in a metal case. The irregular shaped refractory, the base member planted in the irregular shaped refractory, and the ceramic base plate planted in the base member so as to slide on the end surface of the cooling drum,
It is composed of a heater embedded in the base member, and the upper end portion of the ceramic contact plate is made of a material having a high BN content and having excellent self-lubricating property, and the lower end portion is made of a material including glass and having an excellent creep transformation ability. The side weir for continuous casting of wide and thin cast slabs is characterized in that the middle part is formed by laminating materials having excellent thermal shock resistance and wear resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21278793A JP2938319B2 (en) | 1993-08-27 | 1993-08-27 | Side dam for continuous casting of wide thin slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21278793A JP2938319B2 (en) | 1993-08-27 | 1993-08-27 | Side dam for continuous casting of wide thin slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0760411A true JPH0760411A (en) | 1995-03-07 |
| JP2938319B2 JP2938319B2 (en) | 1999-08-23 |
Family
ID=16628381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21278793A Expired - Fee Related JP2938319B2 (en) | 1993-08-27 | 1993-08-27 | Side dam for continuous casting of wide thin slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2938319B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001087517A1 (en) * | 2000-05-17 | 2001-11-22 | Nippon Steel Corporation | Ceramic plate for side weir of twin drum type continuous casting apparatus |
| KR100584743B1 (en) * | 2001-12-21 | 2006-05-30 | 주식회사 포스코 | Edge Dam for Twin Roll Strip Caster |
| CN113226593A (en) * | 2019-01-31 | 2021-08-06 | 电化株式会社 | Ceramic sintered body, method for producing same, and nozzle member |
-
1993
- 1993-08-27 JP JP21278793A patent/JP2938319B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001087517A1 (en) * | 2000-05-17 | 2001-11-22 | Nippon Steel Corporation | Ceramic plate for side weir of twin drum type continuous casting apparatus |
| US6843304B2 (en) | 2000-05-17 | 2005-01-18 | Nippon Steel Corporation | Ceramic plate for side weir of twin drum type continuous casting apparatus |
| KR100584743B1 (en) * | 2001-12-21 | 2006-05-30 | 주식회사 포스코 | Edge Dam for Twin Roll Strip Caster |
| CN113226593A (en) * | 2019-01-31 | 2021-08-06 | 电化株式会社 | Ceramic sintered body, method for producing same, and nozzle member |
| CN113226593B (en) * | 2019-01-31 | 2023-09-29 | 电化株式会社 | Ceramic sintered body, method for producing same, and nozzle member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2938319B2 (en) | 1999-08-23 |
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