JPH02200357A - Mold for continuous casting of steel and lubricating method thereof - Google Patents
Mold for continuous casting of steel and lubricating method thereofInfo
- Publication number
- JPH02200357A JPH02200357A JP1859689A JP1859689A JPH02200357A JP H02200357 A JPH02200357 A JP H02200357A JP 1859689 A JP1859689 A JP 1859689A JP 1859689 A JP1859689 A JP 1859689A JP H02200357 A JPH02200357 A JP H02200357A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- slits
- meniscus
- lubrication
- lubricant
- 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
- 238000000034 method Methods 0.000 title claims description 29
- 238000009749 continuous casting Methods 0.000 title claims description 18
- 229910000831 Steel Inorganic materials 0.000 title claims description 17
- 239000010959 steel Substances 0.000 title claims description 17
- 230000001050 lubricating effect Effects 0.000 title claims description 12
- 238000005461 lubrication Methods 0.000 claims abstract description 40
- 239000000314 lubricant Substances 0.000 claims abstract description 35
- 230000005499 meniscus Effects 0.000 claims abstract description 34
- 238000005266 casting Methods 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 abstract description 2
- 235000019198 oils Nutrition 0.000 description 20
- 238000010586 diagram Methods 0.000 description 5
- 235000019484 Rapeseed oil Nutrition 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007654 immersion Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、鋼の薄肉広幅鋳片を高速鋳造する際に適した
鋳型及び該鋳型の潤滑方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mold suitable for high-speed casting of thin, wide steel slabs, and a method for lubricating the mold.
（従来の技術）
従来、一般に連続鋳造法によってスラブを鋳造する場合
、スラブ厚さは２００閤程度以上であり、浸漬ノズル・
パウダー潤滑による操業が実施されている。近年、圧延
工程の簡略化を図る目的で従来よりかなり薄肉の鋳片を
連続鋳造により直接製造する試みがなされるようになっ
てきている。しかしながら、例えば鋳片厚さが５０腫程
度となると、従来の浸漬ノズルは使用できなくなり、例
え非常に薄い偏平なノズルを用いたとしてもすぐノズル
詰まりが発生し、安定した連続鋳造は期待できない。ま
た、鋳片厚さが薄くなる程、生産性を確保するため高速
鋳造化が必要となり操業はますます困難になると予想さ
れる。。(Prior art) Conventionally, when a slab is generally cast by a continuous casting method, the thickness of the slab is about 200 mm or more, and the immersion nozzle or
Operations are being carried out using powder lubrication. In recent years, in order to simplify the rolling process, attempts have been made to directly produce slabs with considerably thinner walls than before by continuous casting. However, when the thickness of the slab becomes about 50 mm, for example, conventional immersion nozzles cannot be used, and even if a very thin flat nozzle is used, the nozzle will quickly become clogged, and stable continuous casting cannot be expected. Furthermore, as the thickness of the slab becomes thinner, high-speed casting is required to ensure productivity, and it is expected that the operation will become increasingly difficult. .
すなわち高速鋳造化により鋳型と鋳片間の潤滑不良が最
大の問題と考えられるが、浸漬ノズルが使えないオープ
ン給湯の場合には従来はオイル潤滑を実施していた。こ
のオイル潤滑はオイル（なたね油）を鋳型上端から鋳型
の内壁に沿ってメニスカス部に供給する方法であり、こ
の場合メニスカス部でオイルは燃焼するが、燃焼時に生
成されるカーボンが鋳型と鋳片間の潤滑作用を促してい
る。このオイル潤滑法は主に小断面のビレットの場合に
採用されているが、広幅鋳片を高速鋳造する場合にはこ
のような従来のオイル潤滑方法では鋳片幅方向の均一な
潤滑は不可能と考えられ、ブレークアウト等によるトラ
ブルが発生し易くなるという欠点が生じてくる。In other words, due to high-speed casting, insufficient lubrication between the mold and the slab is thought to be the biggest problem, but in the case of open hot water supply where immersion nozzles cannot be used, oil lubrication has traditionally been used. This oil lubrication is a method in which oil (rapeseed oil) is supplied from the upper end of the mold to the meniscus along the inner wall of the mold.In this case, the oil is burned in the meniscus, but the carbon produced during combustion is released between the mold and the slab. Promotes the lubricating effect of This oil lubrication method is mainly used for billets with small cross-sections, but when casting wide slabs at high speed, it is impossible to achieve uniform lubrication across the width of the slab with this conventional oil lubrication method. This results in the disadvantage that troubles such as breakouts are more likely to occur.
そこで、広幅鋳片を高速鋳造する場合の鋳型の潤滑法と
して、潤滑剤をメニスカスの下方１００ Ｍ１以内の１
ケ所の位置のみに強制的に供給する方法が例えば特開昭
５７−５８９６０号公報で従業されているが、この方法
は場面変動があった場合（場面が上昇した場合）のメニ
スカス直下部で焼き付く可能性があり、完全に潤滑を保
証するまでには到らない。Therefore, as a method of lubricating the mold when casting wide slabs at high speed, lubricant is applied to the area within 100 M1 below the meniscus.
For example, Japanese Patent Application Laid-Open No. 57-58960 discloses a method of forcibly supplying the oil only to certain positions, but this method causes burn-in directly below the meniscus when there is a scene change (when the scene rises). However, it is not possible to completely guarantee lubrication.
（発明が解決しようとする課題）
すなわち、連続鋳造時における鋳型への潤滑剤の供給方
法として、従来の鋳型上端からオイルを鋳型に沿って供
給する方法は、薄肉広幅鋳片に対して鋳片幅方向に均一
に潤滑することが困難となってブレークアウトが発生し
易くなる欠点があり、さらに、薄肉化による高速鋳造時
には潤滑不良が発生し安い欠点がある。(Problems to be Solved by the Invention) In other words, as a method of supplying lubricant to a mold during continuous casting, the conventional method of supplying oil along the mold from the upper end of the mold is There is a drawback that it is difficult to lubricate uniformly in the width direction, making it easy for breakouts to occur.Furthermore, there is a drawback that poor lubrication occurs during high-speed casting due to thinning of the wall, resulting in low cost.
また、特開昭５７−５８９６０号公報に記載の方法では
、場面が上昇した際にメニスカス直下部で焼き付く可能
性がある。Furthermore, in the method described in Japanese Patent Application Laid-Open No. 57-58960, there is a possibility that the image will be burned directly below the meniscus when the scene is raised.
本発明は上記した問題点に鑑みて成されたものであり、
薄肉広幅鋳片の高速鋳造時においても、鋳型と鋳片間の
潤滑を十分可能ならしめることができ、ブレークアウト
の発生を抑えて安定した操業を可能とすることを目的と
する。The present invention has been made in view of the above problems, and
The purpose of this invention is to enable sufficient lubrication between the mold and the slab even during high-speed casting of thin-walled and wide slabs, suppress the occurrence of breakouts, and enable stable operation.
（課題を解決するための手段）
本発明者らは、オープン給湯を必要とする薄肉広幅スラ
ブの高速鋳造において自然落下によるオイル供給では潤
滑不良が発生し易く、強制的に供給する必要がある事実
を見出した。すなわち、潤滑不良の発生状況を調査した
ところ、
■ メニスカス位置の下方１００閣程度で焼き付きが生
じる可能性が大きいこと。(Means for Solving the Problems) The present inventors discovered the fact that in high-speed casting of thin-walled wide slabs that require open hot water supply, oil supply by natural falling tends to cause poor lubrication, and it is necessary to forcibly supply oil. I found out. In other words, when we investigated the occurrence of lubrication failure, we found that: ■ There is a high possibility that seizure will occur approximately 100 degrees below the meniscus position.
従って、このメニスカスの下方１５０閣程度の範囲の鋳
型部分を集中的に潤滑すればよいこと。Therefore, it is only necessary to intensively lubricate the mold part within about 150 degrees below the meniscus.
■ 加えてメニスカスの上方からオイルを供給する従来
法を前記■と組合せればメニスカスの下方１００ ｒｓ
ｍ範囲の焼き付き危険領域を更に回避できること。■ In addition, if the conventional method of supplying oil from above the meniscus is combined with the above method, 100 rs below the meniscus
It is possible to further avoid the burn-in danger area in the m range.
■ 前記■を達成するためには鋳型を構成する銅板内面
にスリットを設けることにより潤滑作用が良好になるこ
と、特に、鋳片幅方向の均一化を図るためにメニスカス
部では水平方向スリットを、またそれ以後の潤滑を良好
にするために多数の水平方向スリットと鋳込方向スリッ
トを組合わせることによりさらに潤滑が良好になること
。■ In order to achieve the above (■), slits should be provided on the inner surface of the copper plate constituting the mold to improve the lubrication effect. In particular, horizontal slits should be installed in the meniscus section to ensure uniformity in the width direction of the slab. Further, in order to improve subsequent lubrication, lubrication can be further improved by combining a large number of horizontal slits and casting direction slits.
という事実を見出し、次のような本発明を成立させた。Having discovered this fact, the following invention was established.
すなわち本発明の第１は、鋼の薄肉広幅鋳片を連続鋳造
する場合に鋳型を潤滑する方法において、鋳型内周面の
メニスカス位置の直下に設けた水平方向及び鋳込方向ス
リットを介して潤滑剤を強制的に供給することを要旨と
する鋼の連続鋳造用鋳型の潤滑方法である。That is, the first aspect of the present invention is a method for lubricating a mold when continuously casting thin wide steel slabs, in which lubrication is performed through horizontal and pouring slits provided directly below the meniscus position on the inner peripheral surface of the mold. This is a method of lubricating a mold for continuous casting of steel, the gist of which is forcibly supplying a lubricating agent.
また本発明の第２は、前記第１の本発明の鋳型の潤滑方
法において、更にメニスカス上部より鋳型内周面を介し
てメニスカス部へ潤滑剤を供給することを要旨とする綱
の連続鋳造用鋳型の潤滑方法である。A second aspect of the present invention is a mold lubrication method according to the first aspect of the present invention, further comprising supplying lubricant from the upper part of the meniscus to the meniscus portion through the inner peripheral surface of the mold. This is a method of lubricating the mold.
また本発明の第３は、前記第１の本発明の潤滑方法に使
用する鋳型であって、連続鋳造操業時における鋳型内周
面のメニスカス相当位置より１００１以内に、複数の水
平方向スリットと該水平方向スリットに連通ずる鋳込方
向スリットを刻設し、これらスリットに外部から潤滑剤
を供給する潤滑剤供給通路を設けたことを要旨とする鋼
の連続鋳造用鋳型である。The third aspect of the present invention is a mold used in the lubrication method of the first aspect of the present invention, wherein a plurality of horizontal slits are formed within 100 mm from a position corresponding to the meniscus on the inner peripheral surface of the mold during continuous casting operation. This mold for continuous casting of steel is characterized by having slits in the casting direction communicating with the horizontal slits, and a lubricant supply passage for supplying lubricant from the outside to these slits.
また本発明の第４は、第１又は第２の本発明において、
連続鋳造操業時に鋳型銅板の温度を検出することによっ
て鋳型と鋳片間の潤滑不良部を求め、該潤滑不良部のみ
に強制的に潤滑剤を供給することを要旨とするものであ
る。Moreover, the fourth aspect of the present invention is the first or second aspect of the present invention,
The gist of this method is to detect areas with poor lubrication between the mold and slab by detecting the temperature of the mold copper plate during continuous casting operations, and to forcibly supply lubricant only to the areas with poor lubrication.
（作 用）
以上の如く構成した本発明によってメニスカス位置の下
方約１００ ｍの範囲に潤滑剤を強制供給することによ
り、高速鋳造時の潤滑不良を防止することができる。(Function) By forcibly supplying lubricant to a range of approximately 100 m below the meniscus position according to the present invention configured as described above, poor lubrication during high-speed casting can be prevented.
このようにメニスカス部近傍の強制潤滑により、燃焼ガ
ス化でメニスカスより上方の潤滑も良好に行えることと
なるが、メニスカスの位置は変動することから、従来の
鋳型上部からのオイル供給を併用すればメニスカス位置
の下方１００ ｍ部分の焼き付き易い危険領域をより完
全に回避することが可能となる。In this way, by forcing lubrication near the meniscus, combustion gasification can effectively lubricate the area above the meniscus, but since the position of the meniscus changes, it is necessary to use the conventional oil supply from the top of the mold. It becomes possible to more completely avoid the dangerous area of 100 m below the meniscus where seizure is likely to occur.
さらに前記潤滑を行うに際しては鋳型内面のメニスカス
相当位置より１００ＩＩＩ１以内に複数の水平方向及び
鋳込方向のスリットを設けることにより高速鋳造下にお
いても潤滑剤の消費が均一に、かつ十分確保され潤滑効
果が良好となる。Furthermore, when performing the above-mentioned lubrication, by providing a plurality of slits in the horizontal direction and in the casting direction within 100III1 of the position equivalent to the meniscus on the inner surface of the mold, the consumption of lubricant is uniform and sufficient even under high-speed casting, and the lubrication effect is ensured. becomes good.
またさらに、連続鋳造操業時に鋳型銅板の温度を検出し
て鋳型と鋳片間の潤滑不良部を知り得るようにすれば、
該潤滑不良部のみに集中して強制的に潤滑剤を供給する
ことにより潤滑不良部を積極的に改善できる。Furthermore, if the temperature of the mold copper plate can be detected during continuous casting operation, it will be possible to detect poor lubrication between the mold and the slab.
By concentrating and forcibly supplying lubricant only to the poorly lubricated parts, the poorly lubricated parts can be actively improved.
（実 施 例）
以下本発明を添付図面に示す一実施例に基づいて説明す
る。(Example) The present invention will be described below based on an example shown in the accompanying drawings.
第１図は本発明に係る鋳型潤滑方法の説明図であり、第
１図中１は鋳型、２はタンプッシュから鋳型１内にオー
プン供給された溶鋼であり、該溶鋼２の鋳型ｌとの接触
部分は象、冷されて凝固し、凝固シェル３となっている
。第１図中４はメニスカス、５は冷却水通路を示す。FIG. 1 is an explanatory diagram of the mold lubrication method according to the present invention. In FIG. 1, 1 is a mold, 2 is molten steel that is openly supplied into the mold 1 from a tongue push, and the relationship between the molten steel 2 and the mold 1 is shown. The contact portion is cooled and solidified, forming a solidified shell 3. In FIG. 1, 4 indicates a meniscus, and 5 indicates a cooling water passage.
本発明は、このような鋳型１と凝固シェル３間における
特にメニスカス部の潤滑方法及びそれに使用する鋳型で
あり、第１図及び第２図に示すように鋳型ｌの内周面の
例えばメニスカス４直下に複数の水平方向スリット６を
設け、該水平方向スリット６から下流側に向かって多数
の鋳込方向スリット７を夫々設けた鋳型１を使用して、
最上流側の水平方向スリット６から潤滑剤８を強制的に
供給して他のスリット６及び７に導くことにより、薄肉
広幅鋳片を連続鋳造する場合にあっても、メニスカス部
の潤滑を良好にしようとするものである。これが第１及
び第３の本発明である。The present invention is a method of lubricating the meniscus between the mold 1 and the solidified shell 3, and a mold used therefor. Using a mold 1, in which a plurality of horizontal slits 6 are provided directly below, and a number of casting direction slits 7 are provided downstream from the horizontal slits 6,
By forcibly supplying the lubricant 8 from the horizontal slit 6 on the most upstream side and guiding it to the other slits 6 and 7, the meniscus can be well lubricated even when continuously casting thin and wide slabs. This is what we are trying to do. These are the first and third aspects of the present invention.
ところで前記したスリット６及び７をその内周面に設け
た本発明鋳型１におけるスリット６及び７の断面形状や
幅！及び深さｄ並びにピッチＰ等は特に限定されるもの
ではないが、水平方向スリット６から潤滑剤８を圧入し
、鋳片の幅方向に均一に流入させると共に、鋳込方向ス
リット７を介して潤滑剤８の消費を確保して潤滑を十分
に行わせるためには、例えば断面形状としては第３図に
示す如き逆三角形状で、その幅ｌは０．５ ｍ以下、深
さｄは０．３ ｍ程度、水平方向スリット６のピッチＰ
１は３０ｍ程度又鋳込方向スリット７のピッチＰ２はｌ
閤程度が好ましい。By the way, what are the cross-sectional shapes and widths of the slits 6 and 7 in the mold 1 of the present invention in which the slits 6 and 7 are provided on the inner peripheral surface thereof? The lubricant 8 is press-fitted through the horizontal slit 6 and flows uniformly in the width direction of the slab, and the lubricant 8 is forced into the slab through the slit 7 in the casting direction. In order to ensure the consumption of the lubricant 8 and provide sufficient lubrication, the cross-sectional shape should be, for example, an inverted triangle as shown in FIG. 3, with a width l of 0.5 m or less and a depth d of 0. Approximately .3 m, pitch P of horizontal slit 6
1 is about 30 m, and the pitch P2 of the slit 7 in the casting direction is l.
A roughness level is preferable.
ところで、本発明により水平方向スリット６に圧入する
潤滑剤８の供給圧力としては、静鉄圧に相当する圧力で
供給すれば、特に鋳込初期における溶鋼２の差し込みを
防止できる。By the way, according to the present invention, if the lubricant 8 to be press-fitted into the horizontal slit 6 is supplied at a pressure corresponding to the static iron pressure, insertion of the molten steel 2 can be prevented, especially at the initial stage of casting.
また、メニスカス４は場面変動によって上下することか
ら前記した鋳型ｌのスリット６及び７からの強制潤滑に
加えて鋳型ｌの上部からも従来のオイル９を鋳型内周面
を介して供給すれば、より確実に焼付き易い危険領域（
メニスカス近傍）の潤滑が行なえることになる。これが
第２の本発明である。In addition, since the meniscus 4 moves up and down depending on the situation, if the conventional oil 9 is supplied from the upper part of the mold 1 through the inner peripheral surface of the mold in addition to the forced lubrication from the slits 6 and 7 of the mold 1, Dangerous areas where seizing is more likely (
(near the meniscus) can be lubricated. This is the second invention.
また第２図に示したようにスリット６及び７をその内周
面に設けた鋳型ｌの前記水平方向スリット６に潤滑剤８
を供給する手段としては、第４図に示すように鋳型ｌの
上面から前記水平方向スリット６に連通ずる潤滑剤供給
通路１０を設け、潤滑剤圧送用ポンプ１１を用いて水平
方向スリット６に潤滑剤８を圧送するようにすればよい
、この時第４図に示すように潤滑、荊８の圧入経路を複
数にすることによって、潤滑不良部のみを他の部位に比
べてより積極的に潤滑剤８を圧入することができ、これ
によって潤滑不良を改善することが可能となる。これが
第４の本発明である。Further, as shown in FIG.
As a means for supplying lubricant, as shown in FIG. At this time, as shown in Fig. 4, by providing multiple press-in paths for the lubricant 8, only the poorly lubricated areas can be lubricated more actively than other areas. The agent 8 can be press-fitted, thereby making it possible to improve poor lubrication. This is the fourth invention.
すなわち、鋳型銅板の温度を例えば鋳型１に埋設しであ
る熱電対を用いて検出し、この温度が高いと良好に潤滑
されていると判断し、反対に温度が低いと潤滑不良と判
断するのである。In other words, the temperature of the mold copper plate is detected using, for example, a thermocouple embedded in the mold 1, and if the temperature is high, it is determined that the lubrication is good, whereas if the temperature is low, it is determined that the lubrication is poor. be.
例えば、Ｃ：０．１０〜０．１５重量％の鋼であれば、
凝固収縮が大きい為、潤滑不良部では表面割れが発生す
る。従って他の部位と比べて該潤滑不良部に、より多く
潤滑剤を供給するのである。すなわち、前記表面割れを
防ぐには緩冷却すればよい為、前記した本発明鋳型ｌの
スリット６及び７からより多くの潤滑剤８を供給し、潤
滑剤８とエアーによって緩冷却を図るのである。For example, if the steel contains C: 0.10 to 0.15% by weight,
Due to large solidification shrinkage, surface cracks occur in areas with poor lubrication. Therefore, more lubricant is supplied to the poorly lubricated area than to other areas. That is, in order to prevent the above-mentioned surface cracking, it is sufficient to perform slow cooling, so more lubricant 8 is supplied from the slits 6 and 7 of the mold 1 of the present invention described above, and slow cooling is achieved by the lubricant 8 and air. .
なお、本発明に使用する潤滑剤としては特に限定するも
のではないが、メニスカスの下方に強制的に供給するも
のについてはガス化しにくいもの例えばガラス状の融点
が２００℃の溶融パウダーを用いるのが好ましい。また
鋳型上部から供給する潤滑剤は従来のようにオイル（な
たね油）でも可能である。The lubricant used in the present invention is not particularly limited, but as for the lubricant that is forcibly supplied below the meniscus, it is recommended to use a lubricant that is difficult to gasify, such as a glass-like molten powder with a melting point of 200°C. preferable. The lubricant supplied from the upper part of the mold can also be oil (rapeseed oil) as in the conventional case.
次に本発明の効果を確認するために行った実験の結果に
ついて説明する。Next, the results of experiments conducted to confirm the effects of the present invention will be explained.
湾曲半径１０ｍの１点矯正連続鋳造機において、スラブ
サイズが厚さｔ５０ｍｎＸ幅１８００ｍｍの薄肉広幅ス
ラブを鋳造速度が５〜７ｍ／ｍｉｎで高速鋳造を実施し
た。鋼種は第１表の成分をもつ鋼をオープン給湯・オイ
ル潤滑で鋳造した。第１ストランドは従来の鋳型上端か
らオイル（なたね油）を供給する方法（オイル供給量：
Ｉ ｋｇ／ｒａｉｎ）を用い、第２ストランドには第
２図に示す本発明鋳型を用い、第３ストランドは、第２
ストランドに加えて更にオイル（なたね油）の供給（オ
イル供給ｉｔ： １ｋｇ／ｍ１ｎ）も行った。In a one-point straightening continuous casting machine with a curvature radius of 10 m, high-speed casting was performed at a casting speed of 5 to 7 m/min to form a thin wide slab with a slab size of 50 mm in thickness and 1800 mm in width. Steel having the composition shown in Table 1 was cast using open hot water supply and oil lubrication. The first strand is manufactured using the conventional method of supplying oil (rapeseed oil) from the upper end of the mold (oil supply amount:
I kg/rain), the mold of the present invention shown in Fig. 2 was used for the second strand, and the second strand was used for the third strand.
In addition to the strands, oil (rapeseed oil) was also supplied (oil supply: 1 kg/ml).
本発明方法の実験条件を第２表に示す。Experimental conditions for the method of the present invention are shown in Table 2.
第１表
（単位二重量％）
速鋳造になる程、本発明方法との差は顕著になり、鋳造
速度が６ｍ／ｍｔｎになると従来法の約１１５以下に減
少した。また、中炭素鋼鋳造時に熱電対による測温を実
施した結果、鋳片幅中央部の温度上昇が見られたため、
中央部の潤滑剤を上記第２表に示す供給量から１．５
ｋｇ／ｓｉｎに増加したところ、温度上昇が抑制できた
。なお、比較ストランドにおいては、鋳片幅中央部に縦
割りが発生しており本発明により幅方向の均一潤滑が可
能になった。Table 1 (unit duplex weight %) The difference from the method of the present invention becomes more remarkable as the casting speed becomes faster, and when the casting speed becomes 6 m/mtn, it decreases to about 115 or less in the conventional method. In addition, as a result of temperature measurement using a thermocouple during casting of medium carbon steel, an increase in temperature at the center of the slab width was observed.
The supply amount of lubricant in the center part is 1.5 from the amount shown in Table 2 above.
kg/sin, the temperature rise could be suppressed. In addition, in the comparison strand, vertical splitting occurred at the center of the width of the slab, and the present invention made it possible to lubricate uniformly in the width direction.
（発明の効果）
以上説明したように本発明によれば、綱の薄肉広幅鋳片
を高速鋳造する場合でも鋳型と鋳片間の潤滑が良好に行
なえる為、ブレークアウトの発生が抑制でき、安定した
操業が可能となる。(Effects of the Invention) As explained above, according to the present invention, even when casting thin and wide steel slabs at high speed, the lubrication between the mold and the slab can be performed well, so the occurrence of breakouts can be suppressed. Stable operation becomes possible.
第１図は本発明方法の説明図、第２図は本発明の鋳型内
面の状況を示す図、第３図はスリットの断面を示す拡大
図、第４図は潤滑剤の供給系路を示す図、第５図は実験
結果を示す図である。
１は鋳型、４はメニスカス、６は水平方向スリット、７
は鋳込方向スリット、８は潤滑剤、９はオイル、ｌＯは
潤滑剤供給通路、１１はポンプ。
第４図
第１図
第２図
第５図
８３図
＃Ｊｌｔ 逮）ｌ （銅リーー＾ン
手続補正書（鮭）
平成 １年 ３月 ９日
平成１年特許願第１８５９６号
２、発明の名称
鋼の連続鋳造用鋳型及びその潤滑方法
３、補正をする者
事件との関係 出願人
名 称 （２１１）住友金属工業株式会社４、代理人
補正の内容
（１）本願発明明細書第１１頁第１０行目〜第１２行目
に「、この温度が高いと・・・判断するのである。」と
ある記載を、［、この温度が低い場合及び温度変動が小
さい場合は良好に潤滑されていると判断し、反対に温度
が高い場合及び温度変動が大きい場合は潤滑不良と判断
するのである。Ｊと補正します。
以上
６、補正の対象
明細書の「発明の詳細な説明」の欄Fig. 1 is an explanatory diagram of the method of the present invention, Fig. 2 is a diagram showing the inner surface of the mold of the present invention, Fig. 3 is an enlarged view showing the cross section of the slit, and Fig. 4 is a diagram showing the lubricant supply system. FIG. 5 is a diagram showing the experimental results. 1 is a mold, 4 is a meniscus, 6 is a horizontal slit, 7
8 is a slit in the casting direction, 8 is a lubricant, 9 is oil, IO is a lubricant supply passage, and 11 is a pump. Figure 4 Figure 1 Figure 2 Figure 5 Figure 83 Mold for continuous casting of steel and its lubrication method 3, Relationship with the case of the person making the amendment Applicant name (211) Sumitomo Metal Industries, Ltd. 4, Contents of amendment by agent (1) Specification of the claimed invention, page 11, number 10 Lines 1 to 12 include the statement ``If this temperature is high, it is judged that...'' is changed to ``If this temperature is low and the temperature fluctuation is small, it is assumed that the lubrication is good.'' On the other hand, if the temperature is high or the temperature fluctuation is large, it is determined that there is poor lubrication.It will be corrected as J.6.
Claims (4)
滑する方法において、鋳型内周面のメニスカス位置の直
下に設けた水平方向及び鋳込方向スリットを介して潤滑
剤を強制的に供給することを特徴とする鋼の連続鋳造用
鋳型の潤滑方法。(1) A method of lubricating a mold when continuously casting thin-walled wide steel slabs, in which lubricant is forced through horizontal and pouring slits provided just below the meniscus position on the inner peripheral surface of the mold. A method of lubricating a mold for continuous casting of steel, characterized in that:
ニスカス上部より鋳型内周面を介してメニスカス部へ潤
滑剤を供給することを特徴とする鋼の連続鋳造用鋳型の
潤滑方法。(2) A method for lubricating a mold for continuous casting of steel according to claim 1, further comprising supplying lubricant from the upper part of the meniscus to the meniscus portion through the inner peripheral surface of the mold.
、連続鋳造操業時における鋳型内周面のメニスカス相当
位置より１００ｍｍ以内に、複数の水平方向スリットと
該水平方向スリットに連通する鋳込方向スリットを刻設
し、これらスリットに外部から潤滑剤を供給する潤滑剤
供給通路を設けたことを特徴とする鋼の連続鋳造用鋳型
。(3) A mold used in the lubrication method according to claim 1, wherein a plurality of horizontal slits and a mold communicating with the horizontal slits are formed within 100 mm from a position corresponding to the meniscus on the inner peripheral surface of the mold during continuous casting operation. 1. A mold for continuous casting of steel, characterized by having slits cut in the direction of slits and a lubricant supply passage for supplying lubricant from the outside to these slits.
によって鋳型と鋳片間の潤滑不良部を求め、該潤滑不良
部のみに強制的に潤滑剤を供給することを特徴とする請
求項１あるいは２記載の鋼の連続鋳造用鋳型の潤滑方法
。(4) Claim 1 characterized in that during continuous casting operation, the temperature of the mold copper plate is detected to determine a lubrication-defective area between the mold and the slab, and lubricant is forcibly supplied only to the lubrication-defective area. Alternatively, the method for lubricating a mold for continuous casting of steel according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1859689A JPH02200357A (en) | 1989-01-27 | 1989-01-27 | Mold for continuous casting of steel and lubricating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1859689A JPH02200357A (en) | 1989-01-27 | 1989-01-27 | Mold for continuous casting of steel and lubricating method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02200357A true JPH02200357A (en) | 1990-08-08 |
Family
ID=11976024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1859689A Pending JPH02200357A (en) | 1989-01-27 | 1989-01-27 | Mold for continuous casting of steel and lubricating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02200357A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100467233B1 (en) * | 2000-08-31 | 2005-01-24 | 주식회사 포스코 | Continuous casting mold with lubrication injection road |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5619957A (en) * | 1979-07-26 | 1981-02-25 | Nippon Steel Corp | Production of ingot by continuous casting |
| JPS60221156A (en) * | 1984-04-17 | 1985-11-05 | Kawasaki Steel Corp | Continuous casting method |
| JPS6152964A (en) * | 1984-08-23 | 1986-03-15 | Kawasaki Steel Corp | Mold for continuous casting |
-
1989
- 1989-01-27 JP JP1859689A patent/JPH02200357A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5619957A (en) * | 1979-07-26 | 1981-02-25 | Nippon Steel Corp | Production of ingot by continuous casting |
| JPS60221156A (en) * | 1984-04-17 | 1985-11-05 | Kawasaki Steel Corp | Continuous casting method |
| JPS6152964A (en) * | 1984-08-23 | 1986-03-15 | Kawasaki Steel Corp | Mold for continuous casting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100467233B1 (en) * | 2000-08-31 | 2005-01-24 | 주식회사 포스코 | Continuous casting mold with lubrication injection road |
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