JPH0399755A - Water cooled mold for semi-continuous casting - Google Patents
Water cooled mold for semi-continuous castingInfo
- Publication number
- JPH0399755A JPH0399755A JP23511689A JP23511689A JPH0399755A JP H0399755 A JPH0399755 A JP H0399755A JP 23511689 A JP23511689 A JP 23511689A JP 23511689 A JP23511689 A JP 23511689A JP H0399755 A JPH0399755 A JP H0399755A
- Authority
- JP
- Japan
- Prior art keywords
- water
- cooling water
- mold
- cooling
- wall
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000009749 continuous casting Methods 0.000 title claims description 13
- 239000000498 cooling water Substances 0.000 claims abstract description 64
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000005266 casting Methods 0.000 claims description 17
- 230000007547 defect Effects 0.000 abstract description 5
- 230000008023 solidification Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000035900 sweating 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
この発明は、たとえばアルミニウム製圧延用スラブや、
アルミニウム製押出用ビレットなどの鋳塊を製造するの
に用いられる半連続鋳造用水冷鋳型に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is applicable to, for example, aluminum rolling slabs,
The present invention relates to a semi-continuous casting water-cooled mold used to produce ingots such as aluminum extrusion billets.
この明細書において、「アルミニウム」という語には、
純アルミニウムの他にアルミニウム合金を含むものとす
る。In this specification, the term "aluminum" refers to
In addition to pure aluminum, aluminum alloys are included.
従来の技術と発明の課題
従来、半連続鋳造用水冷鋳型としては、鋳壁および鋳壁
の外周に設けられた水ジャケットよりなり、かつ下部に
２次冷却用水吹出口を有するものが用いられている。こ
の鋳型内に導かれた溶湯は、鋳壁を介しての水ジャケッ
ト内全体の冷却水への熱伝導により１次冷却されて鋳塊
殻が形成され、さらに鋳型から出た鋳塊殻に２次冷却用
水吹出口から水ジャケット内の冷却水がかけられて２次
冷却され、鋳塊が形成されるようになっている。BACKGROUND OF THE INVENTION Conventionally, water-cooled molds for semi-continuous casting are composed of a casting wall and a water jacket provided around the outer periphery of the casting wall, and have a water outlet for secondary cooling at the bottom. There is. The molten metal introduced into the mold is primarily cooled by heat conduction to the cooling water throughout the water jacket through the casting wall, forming an ingot shell. Cooling water in the water jacket is applied from the secondary cooling water outlet to perform secondary cooling and form an ingot.
しかしながら、従来の鋳型を用いて製造された鋳塊には
、粗大セル層、逆偏析層、発汗、焼付き、コールドシャ
ットなどの表面欠陥が生じるという問題があった。これ
は、急激に１次冷却されて鋳型内で形成される鋳塊殻の
厚さが厚くなるためであると考えられる。However, ingots produced using conventional molds have problems such as surface defects such as coarse cell layers, reverse segregation layers, sweating, seizure, and cold shut. This is thought to be because the ingot shell formed in the mold becomes thicker due to rapid primary cooling.
これらの問題を解決するためには、鋳型内の溶湯面レベ
ルを下げて実効鋳型長さを減少させるとともに、鋳造速
度を大きくし、さらに溶湯温度を高くすることが有効で
あると、経験的に知られている。In order to solve these problems, experience has shown that it is effective to lower the molten metal surface level in the mold to reduce the effective mold length, increase the casting speed, and further raise the molten metal temperature. Are known.
しかしながら、上記方法では、逆に湯抜けを起こしやす
く、しかも羽毛状晶も発生しやすいという問題がある。However, the above-mentioned method has problems in that it tends to cause dehydration and also tends to generate feathery crystals.
この発明の目的は、上記問題を解決した半連続鋳造用水
冷鋳型を提供することにある。An object of the present invention is to provide a water-cooled mold for semi-continuous casting that solves the above problems.
課題を解決するための手段
この発明による半連続鋳造用水冷鋳型は、鋳壁および鋳
壁の外周に設けられた水ジャケットよりなり、かつ下部
に２次冷却用水吹出口を有する半連続鋳造用水冷鋳型で
あって、鋳壁の２次冷却用水吹出口よりも上方の部分に
おける水ジャケット側を向いた面に、水ジャケット内に
供給される冷却水全体のうちの一部か通され、かつ該冷
却水が金属溶湯の１次冷却に供されるようになされてい
る１次冷却用水通路が全周にわたって設けられているも
のである。Means for Solving the Problems A water-cooled mold for semi-continuous casting according to the present invention comprises a casting wall and a water jacket provided on the outer periphery of the casting wall, and has a water outlet for secondary cooling at the bottom. In the mold, a part of the entire cooling water supplied into the water jacket is passed through the surface facing the water jacket side in the part above the secondary cooling water outlet of the casting wall, and A primary cooling water passage through which cooling water is used for primary cooling of the molten metal is provided around the entire circumference.
上記において、１次冷却用水通路内を流れる冷却水量は
、水ジャケット内に導入された冷却水全体のうちの１０
〜６０％、望ましくは２０〜４０％であるのかよい。上
記冷却水量が１０％未満であれば１次冷却用水通路内の
冷却水が沸騰して鋳壁への溶湯の焼付きを生じるおそれ
があり、６０％を越えれば１次冷却用水通路内を流れる
冷却水の量が多くなって冷却能が過剰になり、従来と同
様な表面欠陥が生じるおそれがあるからである。In the above, the amount of cooling water flowing through the primary cooling water passage is 10 of the total cooling water introduced into the water jacket.
~60%, preferably 20-40%. If the amount of cooling water is less than 10%, the cooling water in the primary cooling water passage may boil and cause molten metal to seize on the casting wall, and if it exceeds 60%, it will flow through the primary cooling water passage. This is because the amount of cooling water increases and the cooling capacity becomes excessive, which may cause surface defects similar to those of the conventional method.
作 用
鋳型の水ジャケット内に入った冷却水のうち、一部が１
次冷却用水通路内に流入すると、１次冷却能が低下し、
その結果鋳型内で形成される鋳塊殻の厚さを薄くできる
。したがって、鋳塊の表面欠陥の発生を抑制できる。し
かも、上記鋳塊殻の厚さは、１次冷却用水通路内を流れ
る冷却水の流量を変えて１次冷却能を変更することによ
り、自在に変更可能である。Some of the cooling water that entered the water jacket of the working mold
When water flows into the secondary cooling passage, the primary cooling capacity decreases,
As a result, the thickness of the ingot shell formed within the mold can be reduced. Therefore, the occurrence of surface defects in the ingot can be suppressed. Moreover, the thickness of the ingot shell can be freely changed by changing the flow rate of the cooling water flowing through the primary cooling water passage to change the primary cooling capacity.
実 施 例 以下、この発明の実施例を、図面を参照して説明する。Example Embodiments of the invention will be described below with reference to the drawings.
第１図はこの発明による半連続鋳造用水冷鋳型の実施例
を示し、第２図はその一部を拡大して示す。第１図にお
いて、半連続鋳造用水冷鋳型（１）は、鋳壁（２）およ
び鋳壁（２）の外周に設けられた水ジャケット（３）よ
りなる。水ジャケット（３）の下壁（３ａ）に冷却水入
口（４）が形成され、冷却水人口（４）に冷却水供給管
（５）が接続されている。また、水ジャケット（３）の
下壁（３ａ）における冷却水入口（４）よりも鋳壁（２
）側の部分に、上端が水ジャケット（３）内の上部に位
置する冷却水案内板（６）が立上り状に設けられている
。鋳壁（２）と水ジャケット（３）の下壁（３ａ）との
連接部に、下方に向かって鋳型（１）内側に斜めに傾斜
した２次冷却用水吹出口（７）が形成されている。鋳壁
（２）の２次冷却用水吹出口（７）よりも上方の部分に
おける水ジャケット（３）内を向いた面に、水ジャケラ
ｈ（３）の外周壁（３ｂ）側に突出した水平突出壁（８
）が全周にわたって設けられ、水平突出壁（８）の外周
縁に、上端が案内板（６）の上端よりも上方でかつ水ジ
ャケット（３）の上壁（３ｃ）の若干下方に位置する垂
直立上り壁（９）が設けられている。そして、鋳壁（２
）と水平突出壁（８）と立上り壁（９）とに囲まれた部
分が、水ジャケラＩ−（３）内に導入された冷却水全体
のうちの一部を通過させる１次冷却用水通路（１０）と
なされている。立上り壁（９）と上壁（３Ｃ）との間の
部分か１次冷却用水通路（１０）内への冷却水入口（１
１）となっている。水平突出壁（８）には冷却水出口（
１２）が形成されている。FIG. 1 shows an embodiment of a water-cooled mold for semi-continuous casting according to the present invention, and FIG. 2 shows an enlarged part of the mold. In FIG. 1, a water-cooled mold for semi-continuous casting (1) consists of a casting wall (2) and a water jacket (3) provided around the outer periphery of the casting wall (2). A cooling water inlet (4) is formed in the lower wall (3a) of the water jacket (3), and a cooling water supply pipe (5) is connected to the cooling water port (4). Also, the cooling water inlet (4) in the lower wall (3a) of the water jacket (3) is
) is provided with a cooling water guide plate (6) in an upright manner, the upper end of which is positioned above the water jacket (3). A secondary cooling water outlet (7) is formed at the joint between the casting wall (2) and the lower wall (3a) of the water jacket (3), and is inclined downward and inward to the mold (1). There is. On the surface of the cast wall (2) above the secondary cooling water outlet (7) facing inward to the water jacket (3), there is a horizontal surface that protrudes toward the outer peripheral wall (3b) of the water jacket h (3). Projecting wall (8
) is provided around the entire circumference, and the upper end is located above the upper end of the guide plate (6) and slightly below the upper wall (3c) of the water jacket (3) on the outer peripheral edge of the horizontally projecting wall (8). A vertical rising wall (9) is provided. And the cast wall (2
), the horizontally protruding wall (8), and the rising wall (9) are the primary cooling water passages through which a portion of the entire cooling water introduced into the water jacket I-(3) passes. (10). The part between the rising wall (9) and the upper wall (3C) or the cooling water inlet (1) into the primary cooling water passage (10)
1). The horizontal protruding wall (8) has a cooling water outlet (
12) is formed.
冷却水出口（１２）の開度は、第２図に示すように、水
平突出壁（８）上に配置された開度調整具（１３）によ
って調整されるようになっており、冷却水出口（１２）
の開度を調整することにより１次冷却用水通路（１０）
内の冷却水の流星が調整される。As shown in Fig. 2, the opening degree of the cooling water outlet (12) is adjusted by an opening degree adjusting tool (13) placed on the horizontally protruding wall (8). (12)
By adjusting the opening degree of the primary cooling water passage (10)
The meteor of cooling water inside is adjusted.
開度調整具（１３）には貫通孔（１３ａ）が形成されて
いる。開度調整具（］３）は、水平突出壁（８）上面に
おける冷却水出口（２）を挾んで鋳壁（２）側の部分お
よび外周壁（３ｂ）側の部分にそれぞれ設けられかつ互
いに対向する１対の断面り形案内部利’（１４）に沿っ
て水平突出壁（８）の幅方向に移動するようになってい
る。そして、冷却水出口（１２）の開度は、貫通孔（］
、３ａ）と冷却水出口（１２）の重なり部分の面積を可
変とすることにより調整される。冷却水は、冷却水供給
管（５）から冷却水入口（４）を経て水ジャケット（３
）内に供給され、案内板（６）に沿って上昇し、案内板
（６）の上端と水ジャケット（３）の上壁（３Ｃ）との
間を通って鋳型（２）側に流れる。そのうちの一部は、
冷却水人口（１１）を通って１次冷却用水通路（」０）
内に入り、この中を下方に流れて金属溶湯の１次冷却に
供された後、冷却水出口（１２）から通路（１０）外に
出る。他の冷却水は案内板（６）と立上り壁（９）との
間を下方に流れる。そして、通路（１０）から出てきた
冷却水と合流し、吹出口（７）から鋳型（１）内に吹き
出される。A through hole (13a) is formed in the opening degree adjuster (13). The opening adjustment tools (3) are provided on the cast wall (2) side and the outer circumferential wall (3b) side, sandwiching the cooling water outlet (2) on the upper surface of the horizontally protruding wall (8), and are mutually disposed. It is adapted to move in the width direction of the horizontally protruding wall (8) along a pair of opposing cross-sectional guide portions (14). The opening degree of the cooling water outlet (12) is determined by the through hole (]
, 3a) and the cooling water outlet (12) by making the area variable. The cooling water flows from the cooling water supply pipe (5) through the cooling water inlet (4) to the water jacket (3).
), rises along the guide plate (6), and flows toward the mold (2) through between the upper end of the guide plate (6) and the upper wall (3C) of the water jacket (3). Some of them are
Primary cooling water passage ('0) through the cooling water population (11)
The cooling water enters the inside, flows downward therein and is used for primary cooling of the molten metal, and then exits from the cooling water outlet (12) to the outside of the passage (10). Other cooling water flows downward between the guide plate (6) and the rising wall (9). Then, it joins with the cooling water coming out of the passageway (10) and is blown out into the mold (1) from the outlet (7).
このような構成において、水素ガスなどの溶存有害ガス
や非金属介在物を除去する溶湯処理の施された金属溶湯
は、図示しない鋳造樋を通って運ばれ、スパウト（１５
）を通して鋳型（１）内に導かれる。鋳型（１）内の溶
湯面レベルは、スパウ１−（１５）に嵌め被せられた分
配フロー１−（１Ｂ）により一定に保たれる。鋳型（１
）内の溶湯は、１次冷却用水通路（１０）内を流れる１
次冷却水への鋳型（２）を介しての熱伝導により１次冷
却され、鋳塊数（１７）が形成される。鋳塊数（Ｉ７）
が鋳型（１）から出たところで、鋳塊数（１７）に２次
冷却用水吹出口（７）から吹き出された冷却水か当たり
、２次冷却されて中心部まで凝固が完了して鋳塊（１８
）が形成される。In such a configuration, molten metal that has been subjected to molten metal treatment to remove dissolved harmful gases such as hydrogen gas and non-metallic inclusions is conveyed through a casting trough (not shown) and passed through a spout (15
) into the mold (1). The level of the molten metal in the mold (1) is kept constant by the distribution flow 1-(1B) fitted over the spout 1-(15). Mold (1
) flows through the primary cooling water passage (10).
Primary cooling is performed by heat conduction to the secondary cooling water through the mold (2), and an ingot number (17) is formed. Number of ingots (I7)
When the ingot comes out of the mold (1), the number of ingots (17) is hit by the cooling water blown out from the secondary cooling water outlet (7), and the ingot is solidified to the center through secondary cooling. (18
) is formed.
次に、上記半連続鋳造用鋳型（１）を用いて行った鋳造
実験について説明する。Next, a casting experiment conducted using the semi-continuous casting mold (1) will be described.
ＪＩＳＡ２０１４からなる金属溶湯を使用し、鋳造速度
７５ｍｍ／分、溶湯温度６９０±５℃、冷却水温度２６
十３°Ｃ１実効鋳型長さ４０ｍｍの条件で、水ジャケラ
ｈ（３）内金体の冷却水流量および１次冷却用水通路（
１０）内の冷却水流量を下表に示すように変更して直径
１０インチの押出用ビレットをつくった。Using molten metal according to JISA2014, casting speed 75 mm/min, molten metal temperature 690 ± 5 ° C, cooling water temperature 26
Under the conditions of 13°C1 effective mold length 40 mm, the cooling water flow rate of the inner metal body of the water jacket h (3) and the primary cooling water passage (
10) A billet for extrusion with a diameter of 10 inches was prepared by changing the flow rate of cooling water as shown in the table below.
また、比較のために、１次冷却用水通路を持たない従来
の鋳型を使用し、その他は上記実験と同じ条件で押出用
ビレットをつくった。For comparison, an extrusion billet was made using a conventional mold without a primary cooling water passage under the same conditions as in the above experiment.
そして、得られた鋳塊の鋳肌を観察した。そ（以下金白
）
発明の効果
この発明の半連続鋳造用水冷鋳型によれば、上述のよう
にして、従来の鋳型を用いて鋳造された鋳塊に比べて表
面欠陥の少ない鋳塊を鋳造することができる。Then, the casting surface of the obtained ingot was observed. Effects of the Invention According to the water-cooled mold for semi-continuous casting of the present invention, as described above, an ingot with fewer surface defects can be cast than an ingot cast using a conventional mold. can do.
図面はこの発明の実施例を示し、第１図は垂直断面図、
第２図は第１図の部分拡大図である。
（１）・・・半連続鋳造用水冷鋳型、（２）・・・鋳型
、（３）・・・水ジャケット、（７）・・・２次冷却用
水吹出口、（１０）・・・１次冷却用水通路。
以 上The drawings show an embodiment of the invention, with FIG. 1 being a vertical sectional view;
FIG. 2 is a partially enlarged view of FIG. 1. (1)...Water-cooled mold for semi-continuous casting, (2)...Mold, (3)...Water jacket, (7)...Water outlet for secondary cooling, (10)...1 Next cooling water passage. that's all
Claims (1)
なり、かつ下部に２次冷却用水吹出口を有する半連続鋳
造用水冷鋳型であって、 鋳壁の２次冷却用水吹出口よりも上方の部分における水
ジャケット側を向いた面に、水ジャケット内に供給され
る冷却水全体のうちの一部が通され、かつ該冷却水が金
属溶湯の１次冷却に供されるようになされている１次冷
却用水通路が全周にわたって設けられている半連続鋳造
用水冷鋳型。[Scope of Claims] A water-cooled mold for semi-continuous casting, comprising a casting wall and a water jacket provided on the outer periphery of the casting wall, and having a secondary cooling water outlet at the bottom, comprising: a water cooling mold for semi-continuous casting; A portion of the entire cooling water supplied into the water jacket is passed through a surface facing the water jacket side in a portion above the outlet, and the cooling water is provided for primary cooling of the molten metal. A water-cooled mold for semi-continuous casting in which a primary cooling water passage is provided all around the circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23511689A JPH0688104B2 (en) | 1989-09-11 | 1989-09-11 | Water-cooled mold for semi-continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23511689A JPH0688104B2 (en) | 1989-09-11 | 1989-09-11 | Water-cooled mold for semi-continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0399755A true JPH0399755A (en) | 1991-04-24 |
| JPH0688104B2 JPH0688104B2 (en) | 1994-11-09 |
Family
ID=16981294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23511689A Expired - Lifetime JPH0688104B2 (en) | 1989-09-11 | 1989-09-11 | Water-cooled mold for semi-continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0688104B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658579A (en) * | 2012-09-06 | 2014-03-26 | 北京有色金属研究总院 | Device and method for continuously manufacturing high-quality alloy cast ingots |
| CN106513600A (en) * | 2016-12-30 | 2017-03-22 | 西南铝业（集团）有限责任公司 | Crystallizer for casting and cavity water distribution device thereof |
-
1989
- 1989-09-11 JP JP23511689A patent/JPH0688104B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658579A (en) * | 2012-09-06 | 2014-03-26 | 北京有色金属研究总院 | Device and method for continuously manufacturing high-quality alloy cast ingots |
| CN106513600A (en) * | 2016-12-30 | 2017-03-22 | 西南铝业（集团）有限责任公司 | Crystallizer for casting and cavity water distribution device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0688104B2 (en) | 1994-11-09 |
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