JPH0335849A - Mold for continuous casting and lubricating method thereof - Google Patents
Mold for continuous casting and lubricating method thereofInfo
- Publication number
- JPH0335849A JPH0335849A JP17064189A JP17064189A JPH0335849A JP H0335849 A JPH0335849 A JP H0335849A JP 17064189 A JP17064189 A JP 17064189A JP 17064189 A JP17064189 A JP 17064189A JP H0335849 A JPH0335849 A JP H0335849A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- lubricant
- slab
- continuous casting
- slit holes
- 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 abstract description 21
- 238000009749 continuous casting Methods 0.000 title claims description 24
- 230000001050 lubricating effect Effects 0.000 title description 2
- 239000000314 lubricant Substances 0.000 claims abstract description 42
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 37
- 238000005461 lubrication Methods 0.000 claims abstract description 26
- 239000000498 cooling water Substances 0.000 claims abstract description 22
- 238000005266 casting Methods 0.000 claims abstract description 18
- 230000005499 meniscus Effects 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 239000010439 graphite Substances 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 6
- 241000270708 Testudinidae Species 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 20
- 235000019198 oils Nutrition 0.000 description 20
- 235000019484 Rapeseed oil Nutrition 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000011800 void material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 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）
本発明は連続鋳造用鋳型及びその鋳型と鋳片間の潤滑方
法に関し、詳しくは、該鋳型を鋳片鋳込方向に２段以上
に分割形成すると共に、各部位に強制潤滑、強制直接冷
却といった機能を分担させ、これらの機能を十分かつ円
滑に発揮させるようにした鋳型構造に関するものである
。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a continuous casting mold and a method of lubrication between the mold and slab, and more specifically, the present invention relates to a mold for continuous casting and a method of lubrication between the mold and slab. The present invention relates to a mold structure in which functions such as forced lubrication and forced direct cooling are shared among each part, and these functions are fully and smoothly exerted.
（従来の技術）
連続鋳造用鋳型は通常６００〜１２００ｍｍの長さを有
するもので鋳型内壁は高い熱伝導率を有する材料、すな
わち銅または銅合金等により構成されている。(Prior Art) A continuous casting mold usually has a length of 600 to 1200 mm, and the inner wall of the mold is made of a material having high thermal conductivity, such as copper or a copper alloy.
このような鋳型を用いて鋳造を行う場合、溶鋼は鋳型壁
内部に供給される冷却媒体（例えば水）により間接的に
冷却作用を受け、鋳型壁に接する部分から漸次凝固が進
行し、凝固シェルの厚さが内部溶鋼の流体静力学的圧力
に耐え得る程度まで成長するに伴い凝固シェルは収縮し
、鋳型壁と凝固シェルの間に空隙を生じる事になる。When casting is performed using such a mold, the molten steel is indirectly cooled by a cooling medium (e.g. water) supplied inside the mold wall, and solidification progresses gradually from the part in contact with the mold wall, forming a solidified shell. As the thickness of the solidified shell grows to the extent that it can withstand the hydrostatic pressure of the internal molten steel, the solidified shell contracts, creating a void between the mold wall and the solidified shell.
特に矩形断面を有する鋳型においては、鋳型の広面壁中
央部と接する鋳片凝固シェルは内部の温調圧力により外
側に膨出し易く鋳型壁面と比較的よく接触し易いが、鋳
型広面側端部および挟面側の下部においては空隙が顕著
に現れ易い傾向がある。Particularly in a mold with a rectangular cross section, the solidified slab shell in contact with the center of the wide wall of the mold tends to bulge outward due to the internal temperature control pressure and comes into relatively good contact with the mold wall, but at the ends of the wide side of the mold and There is a tendency for voids to appear conspicuously in the lower part of the sandwiched surface side.
この空隙発生は鋳片から鋳型壁への熱伝導効率を著しく
低下させ、鋳片の凝固シェル成長を大きく阻害し、凝固
シェル厚さの不均一による表面縦割れ等品質欠陥の誘因
となり、さらには凝固シェル破損によるブレークアウト
の大きな要因となる場合が多い。これは現状連続鋳造設
備の大きな基本的問題点となっており、特に高速鋳造化
指向への最大の障害になっている。This generation of voids significantly reduces the efficiency of heat transfer from the slab to the mold wall, greatly inhibits the growth of the solidified shell of the slab, and causes quality defects such as surface vertical cracks due to uneven thickness of the solidified shell. This is often a major cause of breakout due to damage to the solidified shell. This is a major fundamental problem with the current continuous casting equipment, and is the biggest obstacle to achieving high-speed casting.
この鋳型壁と凝固シェルの空隙発生を防止する鋳型（装
置）および方法として、■鋳型内における鋳片の平均凝
固収縮率に相当する量だけ鋳型内壁面（平面）を経験的
に内側に傾斜させて固定的に堅持する鋳型および方法、
■鋳型内壁に、鋳造方向に連続する少なくとも２つのテ
ーパー段を付与する、いわゆるマルチテーパー鋳型およ
び方法（特開昭５３−１２５９３２号公報）等が提案さ
れている。しかしこのような鋳型壁の直線的１段または
２段以上、かつ固定的に堅持された傾斜（テーパー）付
与のみでは鋳造速度、温度、鋼種等様々の要因により変
動する複雑な凝固収縮量に順応して凝固シェルと鋳型内
壁面とを適当な接触面圧を保ちながら当接させることは
極めて困難で、鋳型壁面下部で空隙を生したり、逆に凝
固シェルとの断続的接触による鋳型壁の甚だしい摩耗を
生起しやすく、メツキ層の剥離の問題も多い。また、■
相対する２対の鋳型壁のうちの何れか一方もしくは両方
の鋳型壁を上下方向に２段以上分割形成するとともに、
最上段壁を除く下段壁をそれぞれ移動装置に連結し、鋳
型内方を指向して移動自在に設けた鋳型（特開昭５６−
９５４５１号公報）も提案されている。この鋳型は鋳片
との間に適当な面圧を有する下部内面板が鋳片の収縮量
に順応して前後方向に摺動する事によって鋳片との間の
空隙発生を減少し、さらに鋳片との異常接触による下部
内壁板表面の異常摩耗を防止するように工夫したもので
ある。しかし通常どおり鋳型的溶鋼表面に潤滑剤として
モールドパウダー（ＣａＯ−ＳｉＯ□ＣａＦｚ−Ｎａ２
０を主成分とする基材粉と炭素粉の混合物）を添加する
場合、下段鋳型壁と鋳片との隙間に自然にうまく流入さ
れないため、下段鋳型の冷却効果の向上また同時に潤滑
効果の向上も小さい。As a mold (equipment) and method for preventing the generation of voids between the mold wall and the solidified shell, we have empirically shown that the inner wall surface (plane) of the mold is inclined inward by an amount corresponding to the average solidification shrinkage rate of the slab in the mold. a mold and method for holding it firmly;
(2) A so-called multi-taper mold and method (Japanese Unexamined Patent Publication No. 125932/1983) have been proposed in which the inner wall of the mold is provided with at least two tapered steps that are continuous in the casting direction. However, with only one or more straight steps of the mold wall and a fixed slope (taper), it is difficult to adapt to the complicated amount of solidification shrinkage that varies depending on various factors such as casting speed, temperature, steel type, etc. It is extremely difficult to bring the solidified shell into contact with the inner wall of the mold while maintaining an appropriate contact surface pressure. It tends to cause severe wear and there are many problems with peeling of the plating layer. Also,■
Either or both of the two pairs of opposing mold walls are divided into two or more stages in the vertical direction, and
A mold in which the lower walls except the uppermost wall are connected to a moving device so as to be movable inwardly of the mold
95451) has also been proposed. In this mold, the lower inner plate, which has an appropriate surface pressure between the slab and the slab, slides back and forth in accordance with the amount of shrinkage of the slab, thereby reducing the generation of gaps between the slab and the slab. This is designed to prevent abnormal wear on the surface of the lower inner wall plate due to abnormal contact with the pieces. However, mold powder (CaO-SiO□CaFz-Na2) is used as a lubricant on the surface of the molten steel as usual.
When adding carbon powder (a mixture of base material powder and carbon powder mainly composed of carbon powder), it does not naturally flow into the gap between the lower mold wall and the slab, improving the cooling effect of the lower mold and improving the lubrication effect at the same time. It's also small.
したがって下部鋳型壁の摩耗もあまり改善されない。Therefore, the wear of the lower mold wall is not significantly improved.
一方、この鋳型壁と凝固シェルの空隙に伝熱媒体を充填
し、空隙部分の冷却を強化する方法として、■伝熱媒体
として黒鉛、塩化カリウム、塩化カルシウム、塩化ナト
リウム、はう酸等をパウダー状あるいはそれらに菜種油
などを加えてペースト状にして空隙に供給する方法（特
開昭５５−９２２５６号公報）、さらに前記黒鉛微粒子
の混合液を粘度、熱伝導度の観点から改良を加えた、■
植物油（菜種油など）に１０００メツシユ以下の黒鉛微
粒子を１５〜２５体積％添加した混合液を空隙に供給す
る方法（特開昭５７−１５４３５１号公報）も別途提案
されている。しかし、これらの伝熱媒体供給法は、流動
性が悪いため刻々形状が変化する空隙の細部まで行きわ
たらず、十分な伝熱媒体効果が上がらないという問題が
ある。On the other hand, as a method of filling the void between the mold wall and the solidified shell with a heat transfer medium to strengthen the cooling of the void, the method is as follows: ■ Powder of graphite, potassium chloride, calcium chloride, sodium chloride, ferrous acid, etc. or by adding rapeseed oil or the like to the paste and supplying it to the voids (Japanese Unexamined Patent Publication No. 55-92256), and further improving the mixed liquid of graphite particles from the viewpoint of viscosity and thermal conductivity. ■
A method (Japanese Unexamined Patent Publication No. 154351/1982) has also been proposed in which a mixture of vegetable oil (rapeseed oil, etc.) to which 15 to 25% by volume of graphite particles of 1000 mesh or less is added is supplied to the voids. However, these methods of supplying a heat transfer medium have a problem in that, due to poor fluidity, the heat transfer medium cannot reach the fine details of the gaps whose shape changes every moment, and therefore a sufficient heat transfer medium effect cannot be achieved.
そこで本出願人は前述の諸点に鑑みて鋳型広面側端部お
よび挟面側下部に形成される空隙による鋳型冷却能の低
下を防止し、凝固シェル形成を増進、均一化し、または
潤滑の改善により鋳型壁の甚だしい摩耗防止を目的とし
、この目的を達成するために、矩形断面を有する連続鋳
造組立鋳型において、相対する２対の鋳型壁のうちの何
れか一方もしくは両方の鋳型壁を鋳片鋳込方向に２段以
上に分割形成すると共に、最上流側鋳型壁を除く下流側
鋳型壁を複数の冷却水ガイド板で鋳片幅方向に分割構成
し、対を成す下流側鋳型壁を構成する前記夫々の冷却ガ
イド板を互いに接離移動可能に構成したことを特徴とす
る連続鋳造用鋳型を平成１年特許側第３６６４３号明細
書において提案した。Therefore, in view of the above-mentioned points, the present applicant has attempted to prevent the mold cooling ability from decreasing due to the voids formed at the end of the wide side of the mold and the lower part of the narrow side of the mold, to promote and make the solidification shell formation uniform, or to improve lubrication. The purpose is to prevent severe wear on the mold walls, and in order to achieve this purpose, one or both of the two pairs of opposing mold walls in a continuous casting assembly mold with a rectangular cross section are cast into slabs. In addition, the downstream mold wall excluding the most upstream mold wall is divided in the slab width direction by a plurality of cooling water guide plates to form a pair of downstream mold walls. A continuous casting mold was proposed in the specification of Patent No. 36643 of 1999, characterized in that the respective cooling guide plates are configured to be movable toward and away from each other.
（発明が解決しようとする課題）
本出願人が先に提案した連続鋳造用鋳型は先に述べた目
的を達成できる優れた発明であるが、その後の研究によ
り最上流側鋳型の潤滑に係わる下記の問題が内在してい
ることが判明した。(Problems to be Solved by the Invention) The continuous casting mold previously proposed by the present applicant is an excellent invention that can achieve the above-mentioned purpose, but subsequent research has revealed the following problems regarding lubrication of the most upstream mold. It turned out that there was an underlying problem.
すなわち、鋳型潤滑剤として単に通常のモールド・パウ
ダーを使用した場合、その残滓が最上流側鋳型と下流側
鋳型との空間あるいは下流側鋳型間の空間に堆積するか
、または下流側鋳型の内壁に焼付くという問題が生ずる
。また鋳型潤滑剤としてオイルを使用した場合、更に別
の問題が生ずる。すなわち通常のオイル潤滑はオイル（
菜種油等）を鋳型上端から鋳型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
ルが燃焼し、燃焼時に生成される炭素が固体潤滑剤とし
て鋳型−鋳片間の潤滑作用を促す。That is, if ordinary mold powder is simply used as a mold lubricant, its residue will accumulate in the space between the most upstream mold and the downstream mold, or in the space between the downstream molds, or on the inner wall of the downstream mold. The problem of burning occurs. Further problems arise when oil is used as a mold lubricant. In other words, normal oil lubrication is oil (
This is a method in which oil (rapeseed oil, etc.) 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, and the carbon produced during combustion acts as a solid lubricant and acts as a lubricant between the mold and the slab. encourage.
しかし広幅鋳片を高速鋳造する場合には、上記の通常の
オイル潤滑方法では鋳片幅方向の均一なオイル供給、す
なわち均一な潤滑が不可能となる。However, when casting a wide slab at high speed, it is impossible to uniformly supply oil in the width direction of the slab, that is, to provide uniform lubrication using the above-mentioned normal oil lubrication method.
以上いずれの方法によっても問題が発生し、ブレークア
ウト等の操業トラブルが発生し易くなるという欠点が生
じてくる。Problems occur with any of the above methods, and the disadvantage is that operational troubles such as breakouts are more likely to occur.
本発明は以上の諸点に鑑みてなされたもので、本出願人
が先に提案した多段方式鋳型を採用し、それによって最
上流側鋳型は鋳型−鋳片間の強制潤滑、その下流側鋳型
は鋳片の強制直接冷却と言った特有の付加機能を持たせ
、それぞれの該機能を十分に発揮させると共に、最上流
側鋳型において使用した潤滑剤の残滓発生とその鋳型各
部への堆積・焼付きによる下流側鋳型の強制直接冷却機
能の低下、さらにそれによるブレークアウト等の操業ト
ラブルの防止を目的として提案されたものである。The present invention has been made in view of the above points, and employs the multistage mold proposed earlier by the applicant, whereby the most upstream mold has forced lubrication between the mold and the slab, and the downstream mold has forced lubrication between the mold and the slab. In addition to providing unique additional functions such as forced direct cooling of slabs to fully demonstrate each function, it also prevents the generation of lubricant residue used in the most upstream mold and its accumulation and seizure on various parts of the mold. This was proposed with the aim of preventing a decline in the forced direct cooling function of the downstream mold due to the above-mentioned conditions, as well as operational troubles such as breakouts caused by this.
（課題を解決するための手段）
上記目的を達成するために本発明に係る連続鋳造用鋳型
は、矩形断面を有する連続鋳造組立鋳型において、相対
する２対の鋳型壁のうちの何れか一方もしくは両方の鋳
型壁を鋳片鋳込方向に２段以上に分割形成すると共に、
最上流側鋳型内周壁のメニスカス近傍の所定範囲内に複
数のスリット穴を設け、少なくともこれらスリット穴に
潤滑剤を供給する複数の潤滑剤供給通路を設けたことと
しているのである。(Means for Solving the Problems) In order to achieve the above object, a continuous casting mold according to the present invention is provided with a continuous casting mold having a rectangular cross section. Both mold walls are divided into two or more stages in the slab casting direction, and
A plurality of slit holes are provided within a predetermined range near the meniscus of the inner peripheral wall of the mold on the most upstream side, and a plurality of lubricant supply passages for supplying lubricant to at least these slit holes are provided.
また本発明に係る連続鋳造用鋳型と鋳片間の潤滑方法は
、前記構成の連続鋳造用鋳型を用い、複数のスリット穴
から鋳型内周壁と鋳片間に潤滑剤を強制的に供給するこ
ととしているのである。Furthermore, the method of lubrication between a continuous casting mold and a slab according to the present invention uses the continuous casting mold having the above configuration, and forcibly supplies lubricant between the inner peripheral wall of the mold and the slab through a plurality of slit holes. It is said that
更に、本発明に係る他の連続鋳造用鋳型は、前記構成の
連続鋳造用鋳型の最上流側鋳型を除く下流側鋳型壁を複
数の冷却水ガイド板で鋳片幅方向に分割構成し、対を成
す下流側鋳型壁を構成する前記夫々の冷却ガイド板を互
いに接離移動可能に構Ｉ戊しているのである。Furthermore, in another continuous casting mold according to the present invention, the downstream mold wall except for the most upstream mold of the continuous casting mold having the above structure is divided in the slab width direction by a plurality of cooling water guide plates, and The cooling guide plates forming the downstream mold wall are movable toward and away from each other.
また更に、前記潤滑方法においては、最上流側鋳型と鋳
片間に強制的に供給する潤滑剤をオイル又はオイルと黒
鉛粒の混合液とすることが望ましい。Furthermore, in the lubrication method, it is desirable that the lubricant forcibly supplied between the most upstream mold and the slab be oil or a mixture of oil and graphite particles.
（作 用）
本発明において、最上流側鋳型に鋳型−鋳片間の強制潤
滑、また最上流側鋳型を除く下流側鋳型に鋳片の強制直
接冷却と言った特有の付加機能を分担させたのは、下記
の理由による。(Function) In the present invention, the most upstream mold has the unique additional functions of forced lubrication between the mold and the slab, and the downstream molds other than the most upstream mold have the forced direct cooling of the slab. This is due to the following reasons.
（１）最上流側鋳型に関して、オイルまたはオイルと黒
鉛粒の混合液を潤滑剤とし、それを鋳型−鋳片間に強制
注入したのは、下記の理由による。(1) Regarding the most upstream mold, oil or a mixture of oil and graphite particles was used as a lubricant, and the lubricant was forcibly injected between the mold and the slab for the following reason.
すなわち通常のモールドパウダーによる潤滑の際はその
残滓が発生し、その残滓の鋳型各部への堆積・焼付きに
より、下流側鋳型の強制直接冷却機能の不均一や低下を
引き起こすため、残滓が固体潤滑剤としての機能を持つ
炭素であるところのオイルまたはオイルと黒鉛粒の混合
液を潤滑剤として使用するのが望ましい。しかも従来の
オイル潤滑のように鋳型上端から鋳型内壁ニ沿ってメニ
スカス部にオイルを供給する方法は、広幅鋳片の幅方向
均一潤滑は困難で、特に高速鋳造下では不可能に近いた
め、本発明では最上流側鋳型内周壁のメニスカス近傍の
所定の範囲内に、複数のスリット穴を設置し、これらス
リット穴に潤滑剤を低流量安定供給するため、潤滑剤供
給通路を複数個設けた。すなわち最上流側鋳型の均一潤
滑の円滑な発揮と、下流側鋳型の鋳片の強制直接冷却機
能の保全を狙ったのである。In other words, when lubricating with normal mold powder, residue is generated, and the residue accumulates and seizes on various parts of the mold, causing unevenness and deterioration of the forced direct cooling function of the downstream mold. It is preferable to use oil or a mixture of oil and graphite particles as the lubricant, which is carbon that acts as a lubricant. Moreover, with conventional oil lubrication methods, in which oil is supplied from the upper end of the mold to the meniscus along the inner wall of the mold, uniform lubrication in the width direction of wide slabs is difficult, and is nearly impossible, especially under high-speed casting. In the invention, a plurality of slit holes are provided within a predetermined range near the meniscus of the inner peripheral wall of the mold on the most upstream side, and a plurality of lubricant supply passages are provided to stably supply lubricant to these slit holes at a low flow rate. In other words, the aim was to ensure uniform lubrication of the most upstream mold and to maintain the forced direct cooling function of the slab in the downstream mold.
なお、前記複数の潤滑剤供給通路に潤滑剤を供給するタ
ンクは、鋳型の外部に設けても、また鋳型を構成するバ
ックプレート内に設けてもよい。Note that the tank for supplying lubricant to the plurality of lubricant supply passages may be provided outside the mold, or may be provided within the back plate that constitutes the mold.
（２）下流側鋳型に関して、複数の冷却水ガイド板を用
いて下流側鋳型を鋳片幅方向に分割構成したのは、■凝
固シェルが広幅面中央のみ膨らんでいるため、分割構成
することによって中央部と、端部の隙間を一定にするた
め、■広幅の冷却水ガイド板を使用した場合、熱変形に
よる歪が大きく、隙間の一様化が不可能なため、である
。(2) Regarding the downstream mold, the reason why the downstream mold is divided in the slab width direction using multiple cooling water guide plates is because the solidified shell bulges only in the center of the wide side. This is because, in order to make the gap between the center and end portions constant, (1) If a wide cooling water guide plate is used, the distortion due to thermal deformation will be large and it will be impossible to make the gap uniform.
さらに、■複数の冷却水ガイド板を用いたため、たとえ
最上流側鋳型においてオイル燃焼時の残滓である炭素が
多量に発生しても、高速水膜を利用しているので、冷却
水ガイド板間の間隙等へ容易に流出させることが可能な
ため、でもある。In addition, ■ Since multiple cooling water guide plates are used, even if a large amount of carbon, which is a residue from oil combustion, is generated in the most upstream mold, a high-speed water film is used, so the gap between the cooling water guide plates is This is also because it can easily flow out into gaps, etc.
上記したｔｉ或の本発明によれば、最上流側鋳型におい
て、その残滓が固体潤滑機能を持つオイルまたはオイル
と黒鉛粒の混合液による強制潤滑を可能にしたため、最
上流側鋳型の均一潤滑機能を飛躍的に増すとともに、下
流側鋳型の高速水膜による鋳片の強制直接冷却機能を円
滑に発揮させるはか（残滓の鋳型各部への堆積、焼付き
がないため、水膜流の流れが乱されないため）、潤滑剤
の残滓の鋳型各部への堆積、焼付き等によるブレークア
ウト等の操業トラブルを極端に減少することが可能とな
る。According to the above-mentioned invention, forced lubrication of the oil whose residue has a solid lubrication function or a mixture of oil and graphite particles is made possible in the most upstream mold, so that the uniform lubrication function of the most upstream mold is achieved. At the same time, it is possible to smoothly perform the forced direct cooling function of the slab by the high-speed water film of the downstream mold. This makes it possible to significantly reduce operational troubles such as breakouts due to the accumulation of lubricant residue on various parts of the mold and seizing.
（実 施 例）
以下本発明を添付図面に基づいて更に具体的に説明する
。(Example) The present invention will be described in more detail below based on the accompanying drawings.
第１図は本発明の一実施例を示したものであり、連続鋳
造用鋳型を上流側鋳型１と下流側鋳型２の二分割にした
場合の組込み構造を示す。FIG. 1 shows an embodiment of the present invention, and shows an assembly structure in which a continuous casting mold is divided into two parts, an upstream mold 1 and a downstream mold 2.
ところで、上流側鋳型１は通常、テーパーを付与された
鋳型壁、または相対する２対の平行鋳型壁を有しており
、当該鋳型壁と鋳片１０の間における特にメニスカス近
傍の潤滑に機能する鋳型である。そして第２図に示すよ
うに上流側鋳型１の内周壁面の例えばメニスカス近傍の
所定範囲内に複数のスリット穴１２を設け、当該スリッ
ト穴１２から潤滑剤１３を強制的に供給できるように構
成されている。By the way, the upstream mold 1 usually has a tapered mold wall or two pairs of opposing parallel mold walls, and functions to lubricate the area between the mold wall and the slab 10, especially near the meniscus. It is a mold. As shown in FIG. 2, a plurality of slit holes 12 are provided within a predetermined range of the inner circumferential wall surface of the upstream mold 1, for example near the meniscus, and the lubricant 13 is forcibly supplied from the slit holes 12. has been done.
ところで、前記スリット穴１２のサイズ（幅、長さ）、
並びに設置ピッチ等は特に限定されるものではないが、
鋳片輻方向に関して均一に潤滑剤１３の消費を確保して
、潤滑を十分に行わせるためには、第３図（イ）に示す
如き逆三角形の断面形状で、その幅ｌは０．５ ｍ以下
、深さｄ ＆；！０．３１１１１程度の鋳造方向の縦溝
１６を、第３図（ロ）に示すようにピッチ１ｍ程度でメ
ニスカス近傍の所定範囲内に設け、当該縦溝１６の底部
に相当する位置で、鋳造方向に長い形状のスリット穴１
２を設けるのが望ましい。By the way, the size (width, length) of the slit hole 12,
Also, the installation pitch etc. are not particularly limited, but
In order to ensure uniform consumption of the lubricant 13 in the slab radiation direction and to ensure sufficient lubrication, an inverted triangular cross-sectional shape as shown in FIG. m or less, depth d &;! Vertical grooves 16 of approximately 0.31111 in the casting direction are provided within a predetermined range near the meniscus at a pitch of approximately 1 m, as shown in FIG. long slit hole 1
It is desirable to provide 2.
また、当該上流側鋳型１のスリット穴１２から鋳型−鋳
片間の間隙に圧入される潤滑剤１３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、特に鋳造初期に
おける溶鋼１４の差し込みを防止できる。なお縦溝１６
とその底部にスリット穴１２を設けたのは、潤滑剤を流
れやすくし、燃焼後の残滓による鋳型内壁への焼付き、
堆積を防止するためである。Furthermore, if the supply pressure of the lubricant 13 that is press-fitted into the gap between the mold and the slab from the slit hole 12 of the upstream mold 1 is equivalent to the static iron pressure, it is possible to can be prevented from being inserted. Note that the vertical groove 16
The reason why the slit hole 12 is provided at the bottom of the slit hole 12 is to make it easier for the lubricant to flow, and to prevent the residue after combustion from sticking to the inner wall of the mold.
This is to prevent deposition.
更に、メニスカス１１は湯面変動によって上下すること
から、上記の縦溝１６およびスリット穴１２の設置位置
は、メニスカス１１の直上１００ ｍｍから直下１００
ｍまでを最小範囲として潤滑剤１３を供給すれば、よ
り確実に焼付きを防止することが可能となる。なお、上
流側鋳型１の内壁上端から下端まで縦溝１６およびスリ
ット穴１２を設けても何ら差しつかえはない。Furthermore, since the meniscus 11 moves up and down due to fluctuations in the hot water level, the installation positions of the vertical grooves 16 and slit holes 12 range from 100 mm directly above the meniscus 11 to 100 mm directly below the meniscus 11.
If the lubricant 13 is supplied within the minimum range up to m, seizure can be more reliably prevented. Note that there is no problem in providing the vertical groove 16 and the slit hole 12 from the upper end to the lower end of the inner wall of the upstream mold 1.
さらに、第２図に示したようにスリット穴１２をその内
周壁面に設けた上流側鋳型ｌの縦溝１６内のスリ７ト穴
１２に潤滑剤１３を供給する手段としては、、前記メニ
スカス近傍位置に設けた複数のスリット穴１２に連通ず
る潤滑剤供給タンク１５を上流側鋳型内またはその背後
に設け、均圧化することにより、潤滑剤供給通路１７を
介して複数のスリット穴１２から均等に潤滑剤１３を排
出させることが可能となる。この時、この潤滑剤供給タ
ンク１５の圧力を検知し、かつタンク及び潤滑剤供給通
路Ｉ７の和を複数にすることにより、潤滑不良部に他の
部位に比べてより積極的に潤滑剤１３を排出させること
も可能となる。Furthermore, as shown in FIG. 2, the means for supplying the lubricant 13 to the slit holes 12 in the vertical grooves 16 of the upstream mold l having the slit holes 12 provided on its inner circumferential wall surface is the meniscus A lubricant supply tank 15 that communicates with the plurality of slit holes 12 provided in the vicinity is provided in or behind the upstream mold, and by equalizing the pressure, the lubricant is supplied from the plurality of slit holes 12 via the lubricant supply passage 17. It becomes possible to discharge the lubricant 13 evenly. At this time, by detecting the pressure of the lubricant supply tank 15 and making the sum of the tank and the lubricant supply passage I7 more than one, the lubricant 13 is applied more actively to the poorly lubricated area than to other parts. It is also possible to discharge it.
なお、本発明に係わる潤滑剤としては、残滓による鋳型
各部への焼付き、堆積が少ないオイル（菜種油など）、
またはオイルと黒鉛粒の混合液が適当である。In addition, the lubricants related to the present invention include oils (rapeseed oil, etc.) that are less likely to cause residues to seize and accumulate on various parts of the mold;
Alternatively, a mixture of oil and graphite particles is suitable.
一方、下流側鋳型２は例えば第４図（イ）に示す短捕状
または同図（ロ）に示す亀甲状に類する形状の複数の冷
却水ガイド板３より構成され、それぞれ例えばシリンダ
４等の移動装置にリンク８を介して連結され、対を成す
鋳型壁面が接離移動できるように成されている。なお、
第１図中９はスプリングを示す。On the other hand, the downstream mold 2 is composed of a plurality of cooling water guide plates 3 each having a short catch shape as shown in FIG. 4(A) or a tortoise shell shape as shown in FIG. It is connected to a moving device via a link 8 so that the pair of mold wall surfaces can move toward and away from each other. In addition,
9 in FIG. 1 indicates a spring.
第４図は下流側鋳型２壁を構成する冷却水ガイド板３の
概略を示すものであり、当該冷却水ガイド板３には給水
口５列と排水口６列を交互に設は当該給水部と排水部と
に設けられた圧力検知器７により圧力を検出し、この検
出値に応じてシリンダ４により各冷却水ガイド仮３を移
動できるようにしている。Fig. 4 schematically shows the cooling water guide plate 3 that constitutes the wall of the downstream mold 2, and the cooling water guide plate 3 is provided with five rows of water supply ports and six rows of drainage ports alternately. The pressure is detected by pressure detectors 7 provided in the and drainage parts, and each temporary cooling water guide 3 can be moved by the cylinder 4 according to the detected value.
なお、上流側鋳型ｌの方向への下流側鋳型からの冷却水
の吹き上げ防止と、それによるブレークアウト等の操業
トラブルを防止するため、冷却水ガイド板３の最上段の
列は排水口６列とした方が望ましい。In addition, in order to prevent cooling water from blowing up from the downstream mold in the direction of the upstream mold l, and to prevent operational troubles such as breakouts due to this, the top row of the cooling water guide plate 3 is equipped with 6 rows of drain ports. It is preferable to do so.
また給水口５および排水口６の少なくともどちらか一方
を第４図（イ）に示すようにスリット状長孔とすること
によって、鋳片１０と冷却水ガイド板３間に形成された
水膜内の冷却水の均一な流れを実現できる。In addition, by making at least one of the water supply port 5 and the drain port 6 into a slit-like long hole as shown in FIG. 4(a), the water film formed between the slab 10 and the cooling water guide plate 3 A uniform flow of cooling water can be achieved.
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.
１ヒート５０トンの低炭素アルミキルト鋼を４〜］Ｏｍ
／ｖｔｎなる鋳造条件で、第１図に示す２段式連続鋳造
鋳型を備えた連続鋳造機により、厚さ１０５ｍｍ、幅１
０５０ｍ＋ａの鋳片を製造した。1 heat 50 tons of low carbon aluminum quilt steel from 4 to] Om
/vtn casting conditions, a continuous casting machine equipped with a two-stage continuous casting mold shown in Fig.
A slab of 050m+a was manufactured.
この際使用した上流側鋳型の長さは３５０ ｗａ （メ
ニスカスより下側の長さ２５０ｍｍ）であり、下流側鋳
型には第４図（イ）に示す短佃状ガイド板（幅：］ＯＯ
＋ｎｏ＋、長さ：５５０ｍ＋ａ）を２２個取り付けた。The length of the upstream mold used at this time was 350 wa (length 250 mm below the meniscus), and the downstream mold was equipped with a short convex-shaped guide plate (width: ]OO) as shown in Figure 4 (A).
+no+, length: 550m+a) 22 pieces were installed.
上流側鋳型のスリット穴の詳細を以下に示す。Details of the slit holes in the upstream mold are shown below.
縦溝及びスリット穴の設置位置
二上流側鋳型上端から下端まで全域
縦溝サイズ ：幅ｆ：０．５ｎｍ＋、深さｄ ： ０．
３ ｍｎ＋幅方向ピッチＰ：１ｍ
スリット穴サイズ
：幅０．４ ｍ、長さ２恥、
幅方向ピッチ１閤、鋳造方向ピッ
チ５ｍｍ
しかして鋳造中、スリット穴から鋳型内周壁の単位長さ
（１ｃ＋ｎ ）あたり３．４ ｃｃ／ｍｉｎの菜種油を
供給して鋳造した。Installation position of vertical grooves and slit holes 2 Upstream side The entire area from the upper end of the mold to the lower end Vertical groove size: Width f: 0.5 nm +, Depth d: 0.
3 mn + Width direction pitch P: 1m Slit hole size: Width 0.4 m, length 2 mm, width direction pitch 1 lobe, casting direction pitch 5 mm During casting, the unit length of the inner peripheral wall of the mold from the slit hole (1c + n ) was supplied with rapeseed oil at a rate of 3.4 cc/min.
次に冷却水ガイド板の給水口及び排水口の詳細を以下に
示す。Next, details of the water supply port and drain port of the cooling water guide plate are shown below.
〔伶却水ガイド仮の給水口、排水口の詳細］給水ロ：高
さ１．５１ＴＩｎ＋Ｘ幅１２ｍｍ排水口：高さ２．２１
１１ｍＸ幅１２＋＋ｙｍ給水口および排水口の相互間隔
：それぞれ２ ｍｍ給水口列と排水口列との間隔： ５
０ｍｍしかして鋳造中１、水膜の平均水膜厚さＴを０．
５−に維持し、冷却水の流速を１０〜１５ｍ／Ｓの範囲
にして鋳造した。[Details of temporary water supply port and drain port] Water supply port: Height 1.51TIn+X Width 12mm Drain port: Height 2.21
11m x width 12++ym Mutual spacing between water inlets and drains: 2 mm each Distance between water inlet row and drain outlet row: 5
0mm However, during casting, the average water film thickness T of the water film is 0.
5-, and the cooling water flow rate was set in the range of 10 to 15 m/s.
第５図に操業トラブルの一指標としてブレークアウトの
発生状況を示す。高速鋳造になる程、本発明方法と従来
方法との差は顕著になり、鋳造速度が４ ｍ／１ｌＩｉ
ｎ以上になると、ブレークアウト発生率は従来方法の１
／２０以下に減少した。Figure 5 shows the occurrence of breakouts as an indicator of operational trouble. The difference between the method of the present invention and the conventional method becomes more significant as the casting speed increases, and the casting speed is 4 m/1lIi.
When the number of occurrences exceeds n, the breakout rate is 1 compared to the conventional method.
/20 or less.
（発明の効果）
以上説明したように本発明によれば、上流側鋳型での均
一潤滑性の改善、下流側鋳型での鋳片強冷却化が図られ
、その結果、これらの相乗効果によって４ ｍ／ｍｉｎ
以上の高速鋳造が安定して可能になる。(Effects of the Invention) As explained above, according to the present invention, the uniform lubricity in the upstream mold is improved and the slab is strongly cooled in the downstream mold, and as a result, due to the synergistic effect of these, the m/min
This enables stable high-speed casting.
第１図は本発明鋳型の一実施例を断面して示す正面図、
第２図は上流側鋳型の要部拡大断面図、第３図（イ）は
上流側鋳型に設ける縦溝及びスリット穴の断面を示す拡
大図、（ロ）は縦溝の設置位置を示す説明図、第４図は
冷却水ガイドの説明図であり、（イ）は第１実施例を示
す正面図、（ロ）は第２実施例の要部を示す正面図、（
ハ）は断面して示す側面図、第５図は実験結果図である
。
■は上流側鋳型、２は下流側鋳型、３は冷却水ガイド板
、４はシリンダ、１１はメニスカス、１２はスリット穴
、１７は潤滑剤供給通路。FIG. 1 is a front view showing a cross section of an embodiment of the mold of the present invention;
Figure 2 is an enlarged sectional view of the main part of the upstream mold, Figure 3 (a) is an enlarged view showing the cross section of the vertical grooves and slit holes provided in the upstream mold, and (b) is an explanation showing the installation position of the vertical grooves. 4 are explanatory diagrams of the cooling water guide, (a) is a front view showing the first embodiment, (b) is a front view showing main parts of the second embodiment, (
C) is a cross-sectional side view, and FIG. 5 is a diagram showing the experimental results. 2 is an upstream mold, 2 is a downstream mold, 3 is a cooling water guide plate, 4 is a cylinder, 11 is a meniscus, 12 is a slit hole, and 17 is a lubricant supply passage.
Claims (4)
対する２対の鋳型壁のうちの何れか一方もしくは両方の
鋳型壁を鋳片鋳込方向に２段以上に分割形成すると共に
、最上流側鋳型内周壁のメニスカス近傍の所定範囲内に
複数のスリット穴を設け、少なくともこれらスリット穴
に潤滑剤を供給する複数の潤滑剤供給通路を設けたこと
を特徴とする連続鋳造用鋳型。(1) In a continuous casting assembly mold having a rectangular cross section, one or both of the two opposing mold walls are divided into two or more stages in the slab casting direction, and the most upstream side A mold for continuous casting, characterized in that a plurality of slit holes are provided in a predetermined range near the meniscus of an inner peripheral wall of the mold, and a plurality of lubricant supply passages are provided for supplying lubricant to at least these slit holes.
リット穴から鋳型内周壁と鋳片間に潤滑剤を強制的に供
給することを特徴とする連続鋳造用鋳型と鋳片間の潤滑
方法。(2) A continuous casting mold according to claim 1, characterized in that a lubricant is forcibly supplied between the inner circumferential wall of the mold and the slab through a plurality of slit holes. Lubrication method.
除く下流側鋳型壁を複数の冷却水ガイド板で鋳片幅方向
に分割構成し、対を成す下流側鋳型壁を構成する前記夫
々の冷却ガイド板を互いに接離移動可能に構成したこと
を特徴とする連続鋳造用鋳型。(3) The downstream side mold wall of the continuous casting mold according to claim 1, except for the most upstream side mold, is divided in the slab width direction by a plurality of cooling water guide plates to form a pair of downstream side mold walls. A mold for continuous casting, characterized in that the respective cooling guide plates are configured to be movable toward and away from each other.
法において、最上流側鋳型と鋳片間に強制的に供給する
潤滑剤をオイル又はオイルと黒鉛粒の混合液とすること
を特徴とする連続鋳造用鋳型と鋳片間の潤滑方法。(4) In the method for lubrication between a continuous casting mold and a slab according to claim 2, the lubricant forcibly supplied between the most upstream mold and the slab is oil or a mixture of oil and graphite particles. A lubrication method between a continuous casting mold and a slab, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17064189A JPH0335849A (en) | 1989-06-30 | 1989-06-30 | Mold for continuous casting and lubricating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17064189A JPH0335849A (en) | 1989-06-30 | 1989-06-30 | Mold for continuous casting and lubricating method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0335849A true JPH0335849A (en) | 1991-02-15 |
Family
ID=15908643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17064189A Pending JPH0335849A (en) | 1989-06-30 | 1989-06-30 | Mold for continuous casting and lubricating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0335849A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04294843A (en) * | 1991-03-20 | 1992-10-19 | Sumitomo Metal Ind Ltd | Method for controlling mold for continuous casting |
-
1989
- 1989-06-30 JP JP17064189A patent/JPH0335849A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04294843A (en) * | 1991-03-20 | 1992-10-19 | Sumitomo Metal Ind Ltd | Method for controlling mold for continuous casting |
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