JPH01127152A - Belt for twin belt caster - Google Patents
Belt for twin belt casterInfo
- Publication number
- JPH01127152A JPH01127152A JP28516387A JP28516387A JPH01127152A JP H01127152 A JPH01127152 A JP H01127152A JP 28516387 A JP28516387 A JP 28516387A JP 28516387 A JP28516387 A JP 28516387A JP H01127152 A JPH01127152 A JP H01127152A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- width direction
- cast billet
- slab
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002184 metal Substances 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 230000005499 meniscus Effects 0.000 abstract description 8
- 230000008602 contraction Effects 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- -1 ferrous metals Chemical class 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0605—Continuous 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ツインベルトキャスターにおけるベルトに関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a belt in a twin belt caster.
最近、非鉄金属の鋳造に用いられているツインベルトキ
ャスター（無限軌道式連続鋳造膜（ｌｌ）を鉄系金属に
も適用しようとして、各種の提案がなされている°。Recently, various proposals have been made to apply the twin belt caster (track continuous casting film (LL)) used for casting non-ferrous metals to ferrous metals.
しかしながら、一般に鉄系金属は非鉄金属と比べ溶融温
度が高温であるため、鉄系金属のツインベルトキャスタ
ーにおいては、給湯方式や、下ベルトの溶出、鋳片の表
面欠陥などに問題がある。However, since ferrous metals generally have a higher melting temperature than non-ferrous metals, twin belt casters made of ferrous metals have problems with the hot water supply system, elution of the lower belt, and surface defects in the slab.
すなわち、第７図（−最のツインベルトキャスターの要
部図）において、ツインベルトキャスターのモールドは
、上、下ベルト３、ｌと、これらベルト３．１の走行方
向に平行となって、その両側に設けられた左右のダムブ
ロック５（第８図参照）とからなり、このモールド全体
が下向きに傾斜している。That is, in FIG. 7 (-the main part view of the first twin belt caster), the mold of the twin belt caster is parallel to the running direction of the upper and lower belts 3, 1 and the belts 3.1. It consists of left and right dam blocks 5 (see FIG. 8) provided on both sides, and the entire mold is inclined downward.
かかるモールドに対し、給湯線６から下ベルトｌ上に溶
融金属７を供給し、モールドの下側に設けた１次冷却ス
プレー帯（図示せず）により、溶融金属７を冷却し鋳片
８を鋳造している。To this mold, molten metal 7 is supplied from the hot water supply line 6 onto the lower belt 1, and a primary cooling spray zone (not shown) provided at the bottom of the mold cools the molten metal 7 to form a slab 8. It is being cast.
しかして、かかるモールドにより鋳造された鋳′片８の
下側の表面には各種の欠陥が生じるが、その一つに面縦
割れがある。これは鋳造方向に沿って生じるもので、ス
ラブ鋳片では幅方向中央に発生することが多い、これを
分析してみると、第８図に示すように、凝固による鋳片
８の収縮は、同図（＠より（ｂ）に
Ｗａ Ｗ＋＝α
但し、Ｗ、、Ｗ、は鋳片の幅方向の長さ、αは鋳片の凝
固収縮量
の値で、スチール製の下ベルト１の上を幅方向に滑動し
ながら溶融金属７から鋳片８へと収縮している□、かか
る状態において、ベルトコーティング剤（黒鉛に接着剤
を混入したもの）が不適正であったり、ベルトコーティ
ング剤の部分的剥離が生じると、収縮しようとする鋳片
８に、その幅方向の拘束力を生じ、つまりステイキング
箇所１０を生じ、集中応力が発生し、第８図（Ｃ）のよ
うな割れ疵９が生じる。そのため、ベルトコーティング
剤に関し、改善することも考えられるが、メニスカス部
６ａにおける苛酷な溶融金属７の凝固状態と、通常ベル
トコーティング剤の厚若干３０μとの関係における改善
は極めて困難である。Therefore, various defects occur on the lower surface of the slab 8 cast by such a mold, one of which is vertical cracking. This occurs along the casting direction, and in slab slabs, it often occurs at the center in the width direction. When analyzing this, as shown in Figure 8, the shrinkage of slab 8 due to solidification is: In the same figure (from (b) from @, Wa W + = α. However, W, , W is the length of the slab in the width direction, α is the value of the amount of solidification shrinkage of the slab. While sliding in the width direction, the molten metal 7 shrinks into the slab 8. In such a state, the belt coating agent (graphite mixed with adhesive) may be inappropriate, or the belt coating agent may be When partial delamination occurs, a restraining force is generated in the width direction of the slab 8 that is about to shrink, that is, a staking point 10 is generated, concentrated stress is generated, and cracks as shown in FIG. 8(C) occur. Therefore, it is possible to improve the belt coating agent, but it is extremely difficult to improve the relationship between the severe solidification state of the molten metal 7 in the meniscus portion 6a and the thickness of the belt coating agent, which is usually around 30 μm. be.
ｃ問題点を解決するための手段〕
そこで本発明は、鋳片のベルト接当面における割れ疵を
なくすことに着目して創作されたもので、鋳片の幅方向
の収縮を、上下方向（ベルトの面と直角方向）の収縮に
変換し、ベルトと鋳片との間にスベリを発生させないこ
とを目的とするもので、その要旨とするところは、１対
のベルトと、これらベルトの走行方向に平行で、かつそ
の両側に設けられた左右のダムブロックとからなるモー
ルドを備えたツインベルトキャスターにおいて、前記モ
ールドのメニスカス部近傍のみで、前記ベルトにその幅
方向断面視で波型を形成したことを特徴とするツインベ
ルトキャスターのベルトにある。Measures for Solving Problems c] Therefore, the present invention was created with a focus on eliminating cracks on the belt contact surface of the slab, and the shrinkage in the width direction of the slab is The purpose of this is to convert the shrinkage in the direction perpendicular to the plane of the belt and prevent slippage between the belt and the slab. In a twin belt caster equipped with a mold consisting of left and right dam blocks parallel to and provided on both sides of the caster, a wave shape is formed in the belt in a cross-sectional view in the width direction only in the vicinity of the meniscus part of the mold. The belt of the twin belt caster is characterized by this.
本発明の構成を添付図面に示す実施例にもとづき詳細に
説明する。第１図は本発明の実施例の要部図、第２図は
第１図のＸ矢視要部図、第３図は第２図の拡大説明図、
第４図は第１図の拡大説明図、第５図は第１図の別の拡
大説明図、第６図は第１図の詳細図を示す。The structure of the present invention will be described in detail based on embodiments shown in the accompanying drawings. FIG. 1 is a diagram of a main part of an embodiment of the present invention, FIG. 2 is a diagram of a main part in the direction of the X arrow in FIG. 1, and FIG. 3 is an enlarged explanatory diagram of FIG.
4 is an enlarged explanatory view of FIG. 1, FIG. 5 is another enlarged explanatory view of FIG. 1, and FIG. 6 is a detailed view of FIG. 1.
しかして、本実施例はスラブ鋳造のためのツインベルト
キャスターに好適であって、従来技術を示す第７図およ
び第８図と同一部分は同一符号で示し、その説明を省略
する。Therefore, this embodiment is suitable for a twin belt caster for slab casting, and the same parts as in FIGS. 7 and 8 showing the prior art are designated by the same reference numerals, and their explanation will be omitted.
図中、１１は波形発生ロールで、第１図に示すように下
ベルト１の下面に接し、ニップブーＩ７２とバックアッ
プロール１２との間に設け、また上ベルト３の上面にも
同様に、ニッププーリ４とバンクアップロール１２との
間に設けられている。In the figure, reference numeral 11 denotes a waveform generating roll, which is in contact with the lower surface of the lower belt 1 as shown in FIG. and the bank up roll 12.
この波形発生ロール１１の詳細構造については後述する
。The detailed structure of this waveform generating roll 11 will be described later.
さて、前記波形発生ロール１１を、スチール製の下ベル
ト１に押し付けると、押し付けられた箇所の下ベルトｌ
はヘルドの幅方向に、第２図のような幅方向断面視の波
形が形成される。すなわち、この波形は、初期生成鋳片
８の下表面における幅方向の長さが
Ｗ０＋α
但し、Ｗ６ ：左右ダムブロック間の長さα ：鋳片の
凝固収縮量
になるように設定する。Now, when the waveform generating roll 11 is pressed against the steel lower belt 1, the lower belt l at the pressed part is
A waveform in the cross-sectional view in the width direction as shown in FIG. 2 is formed in the width direction of the heald. That is, this waveform is set so that the length in the width direction on the lower surface of the initially generated slab 8 is W0+α, where W6: length between the left and right dam blocks α: amount of solidification shrinkage of the slab.
ここで、この波形は試験結果によれば、第３図に示すよ
うに、波の高さｈおよび幅Ａについては、ｈ＝０．１〜
２．０”
Ａ＝１０〜１００”
の範囲が良好であった。かかる場合、ｈがこの範囲より
゛大きい値の方へ外れると、波形の山の頂点での応力が
増加するので好ましくなく、また、ｈが小さい値の方へ
外れると、波形の効果が失われる。Here, according to the test results, this waveform has a height h and a width A of the wave, as shown in FIG.
The range of 2.0"A=10 to 100" was good. In such a case, if h deviates from this range towards a larger value, the stress at the peak of the waveform will increase, which is undesirable, and if h deviates towards a smaller value, the effect of the waveform will be lost. .
しかして、メニスカス部６ａにおいて、下ベルト１の溶
融金属７の熱によるバックリングと、前記波形発生器１
１により、第４図のように鋳片８の下面は形成される。Therefore, in the meniscus portion 6a, buckling due to the heat of the molten metal 7 of the lower belt 1 and the waveform generator 1
1, the lower surface of the slab 8 is formed as shown in FIG.
前記波形発生ロール１１の１例を説明すれば、第６図に
おいて、波形発生ロール１１はマグネットが内在してお
り、また１５は、ロール表面に突設された多数のＣｕ合
金製の突起、１６はロール支持軸受用のスクリュージャ
ンキを示す。To explain one example of the waveform generating roll 11, as shown in FIG. 6, the waveform generating roll 11 has a built-in magnet, and numeral 15 has a large number of protrusions made of Cu alloy protruding from the roll surface; shows a screw jack for roll support bearings.
本実施例は以上の構成になっているので、以下の動作を
行う。すなわち、前記のように給湯樋６から溶融金属７
が下ベルト１に給湯されると、そのメニスカス部６ａに
おいては、溶融金属７の熱によって生ずるバックリング
に起因するベルトの伸びと、下ベル）１の下に取り付け
られた波形発生ロール１１とにより、第４図のように鋳
片８の下面は形成される０次いで、下ベルトｌが次のバ
ックアップロール１２に走行すると、下ベルトｌ自身の
バックリングも解消され、かつバックアップロール１２
も平滑ロールであるため、下ベルト１は平面状に戻る。Since this embodiment has the above configuration, the following operations are performed. That is, as mentioned above, the molten metal 7 is discharged from the hot water supply gutter 6.
When hot water is supplied to the lower belt 1, the meniscus portion 6a is elongated due to buckling caused by the heat of the molten metal 7, and due to the corrugation generating roll 11 attached under the lower belt 1. , the lower surface of the slab 8 is formed as shown in FIG.
Since the lower belt 1 is also a smooth roll, the lower belt 1 returns to a flat shape.
かかる下ベルトｌに対し、第４図示の波形の鋳片８の下
面は、静鉄圧１３の増加および形成された鋳片８の１４
矢印方向への収縮によって、波形は小さくなり、最後に
は消滅してしまう。With respect to such a lower belt l, the lower surface of the corrugated slab 8 shown in FIG.
Due to the contraction in the direction of the arrow, the waveform becomes smaller and eventually disappears.
したがって、鋳片８が生成することに伴い幅方向に収縮
しようとするが、この収縮が静鉄圧１３とベルトの波形
とにより、路上下方向の収縮に変換することになり、ベ
ルト上での鋳片８の幅方向のスベリを防止することがで
き、ひいては、鋳片表面の割れ疵を防ぐことができる。Therefore, as the slab 8 is generated, it tends to contract in the width direction, but this contraction is converted into contraction in the downward direction on the road due to the static iron pressure 13 and the waveform of the belt. It is possible to prevent the slab 8 from sliding in the width direction, and in turn, to prevent cracks on the surface of the slab.
本発明によれば、ツインベルトキャスターのモールドの
メニスカス部近傍のみにおいて、ベルトにその幅方向断
面視の波形を形成したので、鋳片生成時の凝固収縮によ
って、鋳片とベルトとにスベリが発生せず、鋳片の表面
に割れ班が生じない。According to the present invention, since the waveform in the cross-sectional view in the width direction is formed on the belt only in the vicinity of the meniscus part of the mold of the twin belt caster, slippage occurs between the slab and the belt due to solidification shrinkage during slab production. No cracks are formed on the surface of the slab.
ベルトに波形を形成し、これでもって鋳片の幅方向のス
ベリを、物理的に解消したので、割れ疵防止を確実に行
うことができる。Since the belt is formed with corrugations to physically eliminate slippage in the width direction of the slab, cracks can be reliably prevented.
第１図は本発明の実施例の要部図、第２図は第１図のＸ
矢視要部図、第３図は第２図の拡大説明図、第４図は第
１図の拡大説明図、第５図は第１図の別の拡大説明図、
第６図は第１図の詳細図、第７図は一般のツインベルト
キャスターの断面図、第８図は従来例の説明図を示す。
１・・・下ベルト、３・・・上ベルト、６ａ・・・メニ
スカス部、５・・・ダムブロック、１１・・・波形発生
ロール。
第１ ご
ｌ。
第２ＣＩ
逼３！：Ｘ′。
第４囚
第５．：。
喀７図
ム
（ｂ）
（Ｃ）Figure 1 is a main part diagram of an embodiment of the present invention, and Figure 2 is a diagram showing the X in Figure 1.
3 is an enlarged explanatory view of FIG. 2, FIG. 4 is an enlarged explanatory view of FIG. 1, FIG. 5 is another enlarged explanatory view of FIG. 1,
FIG. 6 is a detailed view of FIG. 1, FIG. 7 is a sectional view of a general twin belt caster, and FIG. 8 is an explanatory diagram of a conventional example. DESCRIPTION OF SYMBOLS 1...Lower belt, 3...Upper belt, 6a...Meniscus portion, 5...Dam block, 11...Wave generation roll. 1st page. 2nd CI 3! :X'. 4th prisoner 5th. :. 7 diagrams (b) (C)
Claims (1)
つその両側に設けられた左右のダムブロックとからなる
モールドを備えたツインベルトキャスターにおいて、 前記モールドのメニスカス部近傍のみで、前記ベルトに
その幅方向断面視で波型を形成したことを特徴とするツ
インベルトキャスターのベルト。[Scope of Claims] A twin belt caster equipped with a mold consisting of a pair of belts and left and right dam blocks parallel to the running direction of these belts and provided on both sides thereof, comprising: 1. A belt for a twin belt caster, characterized in that the belt is formed with a wave pattern in a cross-sectional view in the width direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28516387A JPH01127152A (en) | 1987-11-13 | 1987-11-13 | Belt for twin belt caster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28516387A JPH01127152A (en) | 1987-11-13 | 1987-11-13 | Belt for twin belt caster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01127152A true JPH01127152A (en) | 1989-05-19 |
Family
ID=17687905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28516387A Pending JPH01127152A (en) | 1987-11-13 | 1987-11-13 | Belt for twin belt caster |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01127152A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5728036A (en) * | 1996-07-10 | 1998-03-17 | Hazelett Strip-Casting Corporation | Elongated finned backup rollers having multiple magnetized fins for guiding and stabilizing an endless, flexible, heat-conducting casting belt |
| JP2008235064A (en) * | 2007-03-22 | 2008-10-02 | Omron Corp | Electromagnetic relay |
-
1987
- 1987-11-13 JP JP28516387A patent/JPH01127152A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5728036A (en) * | 1996-07-10 | 1998-03-17 | Hazelett Strip-Casting Corporation | Elongated finned backup rollers having multiple magnetized fins for guiding and stabilizing an endless, flexible, heat-conducting casting belt |
| JP2008235064A (en) * | 2007-03-22 | 2008-10-02 | Omron Corp | Electromagnetic relay |
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