JPH0751803A - Mold for continuous casting - Google Patents
Mold for continuous castingInfo
- Publication number
- JPH0751803A JPH0751803A JP20483693A JP20483693A JPH0751803A JP H0751803 A JPH0751803 A JP H0751803A JP 20483693 A JP20483693 A JP 20483693A JP 20483693 A JP20483693 A JP 20483693A JP H0751803 A JPH0751803 A JP H0751803A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molten metal
- downstream side
- pass line
- gradually reduced
- 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
Landscapes
- Continuous Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、連続鋳造用鋳型に関す
る。FIELD OF THE INVENTION The present invention relates to a continuous casting mold.
【０００２】[0002]
【従来の技術】鉄鋼生産ラインにおいて、鋼片などを製
造する際、生産性や材質の均一性などを向上させるた
め、溶融した鋼（以下、これを溶湯と呼ぶ）から連続し
て鋳造する連続鋳造設備が用いられている。2. Description of the Related Art In a steel production line, continuous production of molten steel (hereinafter referred to as "molten metal") in order to improve productivity and uniformity of material when manufacturing steel billets and the like. Casting equipment is used.
【０００３】このような連続鋳造設備における従来の鋳
型を図３に示す。溶融炉で溶融されて保持炉に移された
溶湯１０１は、外面を水冷ジャケットにより冷却されて
いる鋳型２１内へ流入口２１ａから流し込まれ、表面側
が凝固した凝固シェル１０２ａをなした鋼片１０２とし
て取出口２１ｂから引抜ローラにより引き抜かれる。A conventional mold in such a continuous casting facility is shown in FIG. The molten metal 101 melted in the melting furnace and transferred to the holding furnace is poured from a flow inlet 21a into a mold 21 whose outer surface is cooled by a water cooling jacket, and as a steel piece 102 forming a solidified shell 102a whose surface is solidified. It is pulled out from the outlet 21b by a pulling roller.
【０００４】この際に、凝固シェル１０２ａは、冷却、
凝固により収縮しているため、鋳型２１の内面２１ｃと
鋼片１０２との間に隙間３１が発生する。隙間３１が発
生すると、鋼片１０２に対する鋳型２１の冷却能力が著
しく低下し、鋼片１０２は、不均一に冷却され、引き抜
きの際に変形不良を発生してしまう。At this time, the solidified shell 102a is cooled,
Since it contracts due to solidification, a gap 31 is generated between the inner surface 21c of the mold 21 and the steel piece 102. When the gap 31 is generated, the cooling capacity of the mold 21 with respect to the steel slab 102 is significantly reduced, the steel slab 102 is unevenly cooled, and defective deformation occurs during drawing.
【０００５】このため、鋳型２１の内面２１ｃをパスラ
イン下流側へ向けて一定の割合で窄まるテーパ状に形成
し、隙間３１を極力小さくするようにしている。For this reason, the inner surface 21c of the mold 21 is tapered toward the downstream side of the pass line at a constant rate to minimize the gap 31.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、図３に
示すように、パスライン下流側へ向けて一定の割合で窄
まるテーパ状の内面２１ｃの鋳型２１では、溶湯１０１
の種類や溶融温度、冷却温度、引き抜き速度などの製造
条件で隙間３１の大きさが変化してしまうので、隙間３
１を常に最小とすることは、非常に困難であるHowever, as shown in FIG. 3, in the mold 21 having the tapered inner surface 21c which is constricted toward the downstream side of the pass line at a constant rate, the molten metal 101
Since the size of the gap 31 will change depending on the manufacturing conditions such as the type of melt, the melting temperature, the cooling temperature, and the drawing speed, the gap 3
It is very difficult to always minimize 1
【０００７】そこで、各製造条件に対応できるよう鋳型
の取出口に対して流入口が出来るだけ大きくなるテーパ
状に形成した鋳型を用いて鋼片を製造することも考えら
れるが、このような鋳型では、鋳型内で凝固した鋼片が
取出口から引き出せなくなってしまう。Therefore, it is conceivable to manufacture a steel slab using a mold having a tapered shape in which the inlet is as large as possible with respect to the outlet of the mold so as to meet each manufacturing condition. Then, the steel piece solidified in the mold cannot be pulled out from the outlet.
【０００８】[0008]
【課題を解決するための手段】前述した課題を解決する
ため、本発明による連続鋳造用鋳型は、内面が溶湯のパ
スライン下流側ほど漸減するテーパ率となる曲面をなす
ようにしたのである。In order to solve the above-mentioned problems, the continuous casting mold according to the present invention has an inner surface having a curved surface with a taper rate which gradually decreases toward the downstream side of the molten metal pass line.
【０００９】[0009]
【作用】鋳型内で発生する鋳片の収縮は、鋳型内の溶湯
のパスライン上流側で最も大きく、パスライン下流側で
はあまり発生しない。従って、鋳型の内面が溶湯のパス
ライン下流側ほど漸減するテーパ率となる曲面をなして
いるので、製造条件に対応して鋳型内の溶湯の界面位置
を調節することにより、鋳型の内面と鋳片との隙間は、
常に最小になる。The contraction of the slab generated in the mold is the largest on the upstream side of the molten metal in the mold, and does not occur much on the downstream side of the path line. Therefore, since the inner surface of the mold has a curved surface with a taper rate that gradually decreases toward the downstream side of the molten metal pass line, by adjusting the interface position of the molten metal in the mold according to the manufacturing conditions, The gap with the piece is
It will always be the minimum.
【００１０】[0010]
【実施例】本発明による連続鋳造用鋳型の一実施例を図
１，２に基づいて説明する。なお、図１には、その一部
破断外観を示し、図２には、その内面の形状を座標系を
用いて表す。EXAMPLE An example of a continuous casting mold according to the present invention will be described with reference to FIGS. Note that FIG. 1 shows a partially broken appearance thereof, and FIG. 2 shows the shape of the inner surface thereof using a coordinate system.
【００１１】鋳型１の外面には、図示しない水冷ジャケ
ットが設けられ、鋳型１の下方には、図示しない引抜ロ
ールが設けられており、流入口１ａから流し込まれた溶
湯１０１は、鋳型１内で冷却されながら取出口１ｂから
引き抜かれるようになっている。A water cooling jacket (not shown) is provided on the outer surface of the mold 1, and a drawing roll (not shown) is provided below the mold 1, so that the molten metal 101 poured from the inflow port 1a is stored in the mold 1. It is adapted to be pulled out from the outlet 1b while being cooled.
【００１２】鋳型１の内面１ｃは、溶湯１０１のパスラ
イン下流側ほど開口面積が小さくなるように、溶湯１０
１のパスライン下流側ほど漸減するテーパ率となる曲面
をなしている。The inner surface 1c of the mold 1 has a smaller opening area toward the downstream side of the molten metal 101 in the pass line, so that the molten metal 10
The curved surface has a taper rate that gradually decreases toward the downstream side of the No. 1 pass line.
【００１３】ここで、図２に示すように、一定の割合で
窄まるテーパ状に形成された従来の鋳型の内面の形状
は、取出口の周縁端部を原点（０）とし、長手方向をｘ
軸とし、取出口の開口面に沿う方向をｙ軸とすると、下
記に示す１次直線で表わされる。Here, as shown in FIG. 2, the shape of the inner surface of the conventional mold formed into a taper shape that is constricted at a constant ratio has the peripheral edge of the outlet as the origin (0) and the longitudinal direction. x
When the axis is the axis and the direction along the opening surface of the outlet is the y axis, it is represented by the following linear line.
【数１】ｙ＝ｋ1 ｘ＋ｃ1 但し、ｋ1 ，ｃ1 共に定数である。この場合のテーパ率
（ｎ1 ）は、長手方向の長さをＬ，取出口の図３中、左
右方向の長さをＡ，流入口と取出口との長さの差をｙＬ
とすると、下記のように表すことができる。## EQU1 ## y = k 1 x + c 1 However, both k 1 and c 1 are constants. In this case, the taper ratio (n 1 ) is L in the longitudinal direction, A in the left-right direction in FIG. 3 of the outlet, and A in the length difference between the inlet and the outlet in yL.
Then, it can be expressed as follows.
【数２】ｎ1 ＝（ｙＬ／ＡＬ）×１００[Formula 2] n 1 = (yL / AL) × 100
【００１４】一方、本実施例の鋳型１の内面１ｃの形状
は、下記に示す２次曲線で表すことができる。On the other hand, the shape of the inner surface 1c of the mold 1 of this embodiment can be represented by the quadratic curve shown below.
【数３】ｙ＝ｋ2 ｘ2 ＋ｃ2 ｘ 但し、ｋ2 ，ｃ2 共に定数である。この場合のテーパ率
（ｎ2 ）は、下記のように表すことができる。## EQU3 ## y = k 2 x 2 + c 2 x However, both k 2 and c 2 are constants. The taper rate (n 2 ) in this case can be expressed as follows.
【数４】ｎ2 ＝２ｄｙ／ｄｘ(4) n 2 = 2dy / dx
【００１５】従って、本実施例の鋳型１の長手方向の長
さ及び取出口１ｂの大きさ及び流入口１ａと取出口１ｂ
との長さの差を前述した従来の鋳型と同様な大きさにす
ると共に、取出口１ｂの周縁端部のテーパ率を０とする
と、鋳型１の内面１ｃは、下記に示す２次曲線で表わす
ことができる曲面状に加工すれば良い。Therefore, the length in the longitudinal direction of the mold 1 of this embodiment, the size of the outlet 1b, the inlet 1a and the outlet 1b.
If the taper ratio of the peripheral edge of the take-out port 1b is set to 0 and the difference in length between the mold and the mold is the same as that of the conventional mold described above, the inner surface 1c of the mold 1 is a quadratic curve shown below. It may be processed into a curved surface that can be represented.
【数５】ｙ＝（ｙＬ／Ｌ2 ）×ｘ2 これにより、溶湯１０１の湯面１０１ａの位置における
テーパ率は、従来の鋳型のテーパ率の約２倍となり、発
生する隙間は、従来の鋳型の約半分に減少するのであ
る。Y = (yL / L 2 ) × x 2 As a result, the taper ratio of the molten metal 101 at the position of the molten metal surface 101a is about twice the taper ratio of the conventional mold, and the generated gap is smaller than that of the conventional mold. It is reduced to about half of the template.
【００１６】この本実施例の鋳型１を用いて連続鋳造す
るには、各種製造条件に対応して、鋳型１内の溶湯１０
１の湯面１０１ａが常に所定の位置となるように、溶湯
１０１を流入口１ａから鋳型１内へ流し込み、水冷ジャ
ケットにより溶湯１０１を冷却しながら取出口１ｂから
引抜ロールで引き抜く。In order to perform continuous casting using the mold 1 of this embodiment, the molten metal 10 in the mold 1 is used in accordance with various manufacturing conditions.
The molten metal 101 is poured into the mold 1 from the inflow port 1a so that the first molten metal surface 101a is always in a predetermined position, and the molten metal 101 is cooled by the water cooling jacket and pulled out from the ejection port 1b by a drawing roll.
【００１７】これにより、鋳片の収縮具合が製造条件で
変化しても、鋳型１の内面１ｃと鋳片との隙間は、常に
最小となるのである。As a result, the gap between the inner surface 1c of the mold 1 and the cast piece is always minimized even if the degree of contraction of the cast piece changes depending on the manufacturing conditions.
【００１８】[0018]
【発明の効果】前述したように、本発明による連続鋳造
用鋳型では、鋳型の内面が溶湯のパスライン下流側ほど
漸減するテーパ率となる曲面をなしているので、鋳型内
の溶湯の界面位置を製造条件に対応して調節することに
より、常に最適なテーパ率で鋳片が製造され、鋳型の内
面と鋳片との隙間は、常に最小となり、鋳片に対する冷
却能率が大幅に向上し、不均一冷却による鋳片の変形が
防止されると共に、鋳片の引抜抵抗が小さくなり、引き
抜きが容易になる。As described above, in the continuous casting mold according to the present invention, the inner surface of the mold has a curved surface having a taper rate that gradually decreases toward the downstream side of the molten metal pass line. By adjusting according to the manufacturing conditions, the cast piece is always manufactured with the optimum taper ratio, the gap between the inner surface of the mold and the cast piece is always the minimum, and the cooling efficiency for the cast piece is greatly improved. Deformation of the slab due to non-uniform cooling is prevented, pullout resistance of the slab is reduced, and pulling out is facilitated.
【図１】本発明による連続鋳造用鋳型の一部破断外観図
である。FIG. 1 is a partially broken external view of a continuous casting mold according to the present invention.
【図２】その内面の形状を座標系を用いて表した図であ
る。FIG. 2 is a diagram showing the shape of the inner surface using a coordinate system.
【図３】従来の連続鋳造用鋳型の断面図である。FIG. 3 is a cross-sectional view of a conventional continuous casting mold.
１ 鋳型 １ａ 流入口 １ｂ 取出口 １ｃ 内面 １０１ 溶湯 １０１ａ 湯面 1 Mold 1a Inlet 1b Outlet 1c Inner Surface 101 Molten Metal 101a Molten Surface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 隆 広島県広島市西区観音新町四丁目６番22号 菱重製鉄エンジニアリング株式会社広島 支社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Kobayashi 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Hishiju Steel Engineering Co., Ltd. Hiroshima Branch Office
Claims (1)
するテーパ率となる曲面をなすことを特徴とする連続鋳
造用鋳型。1. A continuous casting mold characterized in that the inner surface has a curved surface with a taper rate that gradually decreases toward the downstream side of the molten metal pass line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20483693A JP3233745B2 (en) | 1993-08-19 | 1993-08-19 | Continuous casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20483693A JP3233745B2 (en) | 1993-08-19 | 1993-08-19 | Continuous casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0751803A true JPH0751803A (en) | 1995-02-28 |
| JP3233745B2 JP3233745B2 (en) | 2001-11-26 |
Family
ID=16497196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20483693A Expired - Lifetime JP3233745B2 (en) | 1993-08-19 | 1993-08-19 | Continuous casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3233745B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008049385A (en) * | 2006-08-28 | 2008-03-06 | Mishima Kosan Co Ltd | Continuous casting mold |
| JP2014039944A (en) * | 2012-08-22 | 2014-03-06 | Nippon Steel & Sumitomo Metal | Continuous mold and continuous casting method of high alloy steel round cast billet |
| JP2016087613A (en) * | 2014-10-30 | 2016-05-23 | Ｓｅｓ連鋳エンジニアリング株式会社 | Casting mold for continuous casting |
-
1993
- 1993-08-19 JP JP20483693A patent/JP3233745B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008049385A (en) * | 2006-08-28 | 2008-03-06 | Mishima Kosan Co Ltd | Continuous casting mold |
| JP2014039944A (en) * | 2012-08-22 | 2014-03-06 | Nippon Steel & Sumitomo Metal | Continuous mold and continuous casting method of high alloy steel round cast billet |
| JP2016087613A (en) * | 2014-10-30 | 2016-05-23 | Ｓｅｓ連鋳エンジニアリング株式会社 | Casting mold for continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3233745B2 (en) | 2001-11-26 |
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