JPH054170B2 - - Google Patents
Info
- Publication number
- JPH054170B2 JPH054170B2 JP19175284A JP19175284A JPH054170B2 JP H054170 B2 JPH054170 B2 JP H054170B2 JP 19175284 A JP19175284 A JP 19175284A JP 19175284 A JP19175284 A JP 19175284A JP H054170 B2 JPH054170 B2 JP H054170B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- cylindrical mold
- mold
- gas
- metal
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 claims description 65
- 239000002184 metal Substances 0.000 claims description 65
- 239000007789 gas Substances 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 21
- 238000009749 continuous casting Methods 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 150000002739 metals Chemical class 0.000 claims description 9
- 238000005058 metal casting Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 230000002706 hydrostatic effect Effects 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 11
- 238000005266 casting Methods 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
- B22D11/047—Means for joining tundish to mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は金属、特にアルミニウムまたはその合
金のごとき軽金属の改良された水平連続鋳造法お
よび装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to an improved horizontal continuous casting method and apparatus for metals, particularly light metals such as aluminum or its alloys.
一般に、金属の水平連続鋳造は、次のような過
程を経て金属溶湯から円柱状、角柱状あるいは中
空状の長尺鋳塊が製造される。すなわち、金属溶
湯を溜めるタンデイツシユに入つた溶湯は、耐火
物製通路を通つてほとんど水平に設置された強制
冷却された筒状鋳型内に入り、ここで冷却されて
溶湯本体の外表面に凝固殻が形成される。鋳型か
ら引き出された鋳塊に水などの冷却剤が直接放射
され、鋳塊内部まで金属の凝固が進みながら連続
的に引き出される。
Generally, in horizontal continuous casting of metal, a long ingot in the shape of a cylinder, a prism, or a hollow cylinder is manufactured from molten metal through the following process. In other words, the molten metal enters the tundish, which stores the molten metal, passes through a refractory passageway into a forced-cooled cylindrical mold installed almost horizontally, where it is cooled and forms a solidified shell on the outer surface of the molten metal body. is formed. A coolant such as water is directly radiated onto the ingot that has been pulled out of the mold, and the metal is continuously drawn out as the metal solidifies inside the ingot.
このような金属の水平連続鋳造には、原理的な
困難性が不可避的に依存する。その第一は鋳型が
水平に設置されているため、鋳型内の金属溶湯が
重力によつて鋳型下方の内壁に押しつけられ、こ
のため鋳型内における冷却が下部に強く、上部に
弱いという冷却のアンバランスが生じ、この結果
最終凝固位置が鋳塊の軸芯より上方に偏移してし
まい、均質な組織の鋳塊が得られないことであ
る。そしてその第二は、金属溶湯の鋳型壁への焼
付きを防止するため、潤滑油が鋳型の入口端内周
壁から注入されるが、鋳型内壁全周に均一に注入
すると、上部壁面より下部壁面に油が流れ落ち易
く潤滑界面が不均質となることである。前記のご
とく鋳型下方は金属溶湯と鋳型壁が密に接触し、
凝固殻と鋳型壁の間にクリアランスがないため、
潤滑油が流入せず焼付きのため凝固殻が破れ、未
凝固溶湯が流出（いわゆるブレークアウト）して
大きい鋳肌欠陥となるか又はさらに進んで鋳造不
能となる。 Horizontal continuous casting of such metals inevitably involves theoretical difficulties. Firstly, because the mold is installed horizontally, the molten metal inside the mold is pressed against the inner wall at the bottom of the mold by gravity, which results in a cooling effect in the mold where the cooling is stronger in the lower part and weaker in the upper part. A balance occurs, and as a result, the final solidification position shifts upward from the axis of the ingot, making it impossible to obtain an ingot with a homogeneous structure. Second, in order to prevent the molten metal from sticking to the mold wall, lubricating oil is injected from the inner peripheral wall at the inlet end of the mold, but if it is injected uniformly all around the mold inner wall, the lower wall surface will be more The oil tends to flow down and the lubricating interface becomes non-uniform. As mentioned above, the molten metal and the mold wall are in close contact at the bottom of the mold.
Since there is no clearance between the solidified shell and the mold wall,
Lubricating oil does not flow in and the solidified shell ruptures due to seizure, and the unsolidified molten metal flows out (so-called breakout), resulting in large casting surface defects, or furthermore, making it impossible to cast.
金属の水平連続鋳造法におけるこのような本質
的問題の克服のため、従来からいくつかの解決策
が提案されている。たとえば特公昭39−23710は
金属溶湯の鋳型への注入オリフイス開口を鋳型の
軸芯より下方に配設し、また特公昭45−41509は
鋳型への溶湯の流入口に囲いを設けているがいづ
れも高温溶湯流を鋳型入口で下方に向け、これに
よつて下方の冷却の緩和する方策であり、最終凝
固位置を鋳塊の軸心に近づける相応の効果はある
が、前記した鋳型下方内壁における金属溶湯の偏
移強接触は解決されておらず、鋳塊組織の均質化
は不充分であつた。 In order to overcome these essential problems in the horizontal continuous casting method of metals, several solutions have been proposed in the past. For example, in Japanese Patent Publication No. 39-23710, the orifice opening for injecting molten metal into the mold is located below the axis of the mold, and in Japanese Patent Publication No. 45-41509, an enclosure is provided at the inlet for molten metal into the mold. This is a measure to direct the flow of high-temperature molten metal downward at the mold entrance, thereby easing downward cooling, and it has the corresponding effect of bringing the final solidification position closer to the axis of the ingot. The problem of deviated strong contact between molten metals has not been solved, and the homogenization of the ingot structure has been insufficient.
また実公昭46−28889のごとく潤滑油量の分布
を鋳型内の上方と下方で変える提案もあるが、鋳
型内に働いている重力の作用のため、相当多量の
油を供給しても均一な潤滑界面を形成することは
困難である。またあまり油量が過多になると鋳肌
にオイルフオールドと呼ばれる波模様が生じ欠陥
となる等、この改善方策も実用上充分な効果が得
られていない。 There is also a proposal to change the distribution of lubricating oil between the upper and lower parts of the mold, as in Utility Model Publication No. 46-28889, but due to the effect of gravity acting within the mold, even if a considerable amount of oil is supplied, it will not be uniform. It is difficult to form a lubricating interface. Moreover, if the amount of oil is too large, a wavy pattern called oil fold occurs on the casting surface, resulting in defects, and this improvement measure has not been sufficiently effective in practical use.
本発明は従来の金属の水平連続鋳造法における
上記のごとき問題点すなわち鋳型内における溶湯
の冷却のアンバランス及び鋳型内壁の潤滑界面の
不均一性を解消して、鋳塊組織の均質化、鋳肌欠
陥やブレークアウトを排除して良品質の鋳塊を安
定して鋳造しうる金属の水平連続鋳造方法および
装置を提供することを目的とする。
The present invention solves the above-mentioned problems in the conventional horizontal continuous metal casting method, namely the unbalanced cooling of the molten metal in the mold and the non-uniformity of the lubricating interface on the inner wall of the mold. It is an object of the present invention to provide a method and apparatus for horizontal continuous casting of metal, which can stably cast high-quality ingots while eliminating skin defects and breakouts.
上記の目的を達成するため、本発明者等は種々
研究の結果、実用規模の改善された方法および装
置を実現するに至つた。以下本発明の構成につい
て説明する。
In order to achieve the above object, the inventors of the present invention have conducted various studies and have realized an improved method and apparatus on a practical scale. The configuration of the present invention will be explained below.
本発明の方法および装置を機能的に要約すれ
ば、強制冷却した鋳型内壁からの熱吸収量を、鋳
型軸心より上方に比して下方を抑制し、全周囲の
冷却のアンバランスを解消したところにある。 Functionally, the method and device of the present invention can be summarized as follows: The amount of heat absorbed from the forcedly cooled inner wall of the mold is suppressed below the mold axis compared to above the mold axis, thereby eliminating the unbalanced cooling around the entire circumference. There it is.
すなわち、本発明の第一は、強制冷却され、水
平に置かれた筒状鋳型の上流端に、金属溶湯流入
口を開口した耐火物製板体を挟んでタンデイツシ
ユの金属溶湯出口を接続し、該耐火物製板体が該
筒状鋳型の内周面より内側に張出して隅部を形成
し、前記タンデイツシユから流入させた金属溶湯
を前記筒状鋳型内において柱状または中空状に保
持して凝固させる工程を含む金属の水平連続鋳造
法において、前記筒状鋳型の軸心より下方の前記
隅部に気体を導入して気体圧を印加した空間を形
成せしめ、金属溶湯と前記筒状鋳型内周面との水
平方向の接触位置を下流端側に偏移せしめて冷却
量を制限することを特徴とする金属の水平連続鋳
造法である。そして本発明の第二は、上記方法を
好適に具現化した装置に関し、上記筒状鋳型の軸
芯より下方の前記隅部に気体導入開口が設けら
れ、該気体導入開口は前記金属溶湯が侵入しなう
ように定められ、かつ気体供給源に連通してなる
ことを特徴とする金属の水平連続鋳造装置であ
る。 That is, the first aspect of the present invention is to connect the molten metal outlet of the tundish to the upstream end of a horizontally placed cylindrical mold that is forcibly cooled, with a refractory plate body having an open molten metal inlet in between, The refractory plate extends inward from the inner peripheral surface of the cylindrical mold to form a corner, and the molten metal flowing from the tundish is held in a columnar or hollow shape within the cylindrical mold and solidified. In the horizontal continuous casting method of metal, which includes a step of introducing gas into the corner below the axis of the cylindrical mold to form a space where gas pressure is applied, the molten metal and the inner periphery of the cylindrical mold are This is a horizontal continuous metal casting method characterized by shifting the horizontal contact position with the surface toward the downstream end to limit the amount of cooling. A second aspect of the present invention relates to an apparatus suitably embodying the above method, wherein a gas introduction opening is provided in the corner below the axis of the cylindrical mold, and the molten metal enters the gas introduction opening. 1. A horizontal continuous casting apparatus for metals, characterized in that the apparatus is configured to perform continuous metal casting and is connected to a gas supply source.
本発明の適用対象となる鋳塊の形状は主として
押出あるいは引抜加工用の円柱状鋳塊（一般にビ
レツトという）、圧延加工用の角柱状鋳塊（一般
にスラブという）、もしくは管状あるいは環状物
品の素材となる中空柱状鋳塊である。 The shapes of ingots to which the present invention is applied are mainly cylindrical ingots for extrusion or drawing (generally referred to as billets), prismatic ingots for rolling (generally referred to as slabs), or materials for tubular or annular articles. It is a hollow columnar ingot.
本発明の方法において、筒状鋳型の軸芯より下
方の金属溶湯と該筒状鋳型内周壁との水平方向の
接触位置を該筒状鋳型の下流端側に偏移させるた
めの手段、すなわち気体圧を印加した空間は、該
筒状鋳型の上流端から始まり、下流端に向かつて
特定の長さの区域に保持される。この長さは金属
溶湯外周面が、それを覆う凝固皮膜が充分に薄
く、剛性を示さず、実質的に液体的変形性を有し
ている区域を限界とする。 In the method of the present invention, means for shifting the horizontal contact position between the molten metal below the axis of the cylindrical mold and the inner circumferential wall of the cylindrical mold toward the downstream end of the cylindrical mold, that is, gas The pressurized space is maintained in an area of a certain length starting from the upstream end of the cylindrical mold and moving towards the downstream end. This length is limited to a region where the outer circumferential surface of the molten metal has a sufficiently thin solidified film covering it, exhibits no rigidity, and has substantially liquid deformability.
気体圧を印加する空間は、筒状鋳型の上流端に
接続した耐火物製板体が該筒状鋳型の内周面より
内側に張り出して形成される該鋳型の上流隅部に
気体を導入して特定の気体圧を印加することによ
り形成される。上記空間に一定の気体圧を保持す
るには、ほぼ一定の気体流量を維持することが必
要である。本発明者等の観測によれば、導入され
た気体は上記空間を形成し、過剰分は鋳型内周面
と金属溶湯外周の凝固皮膜または更に冷却されて
凝固収縮した凝固殻の接触界面の微細な間隙から
下流端に向つて流出してゆくことが認められた。 The space for applying gas pressure is formed by introducing gas into the upstream corner of the mold, which is formed by a refractory plate connected to the upstream end of the cylindrical mold projecting inward from the inner peripheral surface of the cylindrical mold. It is formed by applying a specific gas pressure. In order to maintain a constant gas pressure in the space, it is necessary to maintain a substantially constant gas flow rate. According to the observations of the present inventors, the introduced gas forms the above-mentioned space, and the excess gas forms the fine particles at the contact interface between the inner peripheral surface of the mold and the outer circumference of the molten metal, or the solidified shell that is further cooled and solidified and shrunk. It was observed that the water was flowing out from the gap toward the downstream end.
気体圧は気体流量を増すことによつて上昇す
る。しかし気体圧が筒状鋳型の内周底部の位置に
おける金属溶湯の静水圧近傍に達すると気体流量
の増加による気体圧の上昇割合は減少し、さらに
気体流量を増加すれば、溶湯流出（ブレークアウ
ト）を起し易く、また得られた鋳塊は例外なく深
い凹凸の波状鋳肌または焼付鋳肌を呈するように
なる。この原因は過剰の気体が、筒状鋳型内の金
属溶湯外周面を動揺させその表面を覆う薄い凝固
皮膜を破つて溶湯を流出せしめ、あるいは筒状鋳
型の軸芯より上方の金属溶湯外周面に厚い気体流
路が形成されて冷却量を減少せしめるためと推定
される。従つて、導入される気体流量および気体
圧は実験によつて最適値が選定されねばならない
が、この最適値は金属、合金の種類、溶湯温度、
凝固特性、柱状鋳塊の断面形状と径、鋳型ブロツ
クの熱平衡等によつても異る。 Gas pressure is increased by increasing the gas flow rate. However, when the gas pressure reaches the vicinity of the hydrostatic pressure of the molten metal at the bottom of the inner periphery of the cylindrical mold, the rate of increase in gas pressure due to an increase in the gas flow rate decreases. ), and the obtained ingots without exception exhibit a deeply uneven wavy casting surface or a baked casting surface. The cause of this is that excessive gas agitates the outer circumferential surface of the molten metal in the cylindrical mold, breaks the thin solidified film covering the surface, and causes the molten metal to flow out, or the molten metal is exposed to the outer circumferential surface of the molten metal above the axis of the cylindrical mold. It is presumed that this is because a thick gas flow path is formed and the amount of cooling is reduced. Therefore, the optimal values for the introduced gas flow rate and gas pressure must be selected through experiments, but these optimal values depend on the metal, type of alloy, molten metal temperature,
It also depends on the solidification characteristics, the cross-sectional shape and diameter of the columnar ingot, the thermal equilibrium of the mold block, etc.
前記鋳型内の隅部への気体の導入開口は、金属
溶湯が侵入しないスリツト状、微細孔状、のほか
多孔質耐火物、とくにポーラスカーボン、あるい
は窒化珪素結合炭化ケイ素質耐火物が好ましく使
用しうる。そして気体の導入開口は前記鋳型の軸
心より下方の前記隅部に均等に分散して複数箇所
に配設してもよいが、多くの場合筒状鋳型の最底
部の前記隅部に向けて単一に設けることによつて
充分な良結果が得られることが多く、とくに円柱
状鋳塊の場合にはむしろそれが最適である。 The gas introduction openings into the corners of the mold are preferably slit-shaped or microporous to prevent molten metal from entering, or porous refractories, particularly porous carbon, or silicon nitride-bonded silicon carbide refractories. sell. The gas introduction openings may be arranged at multiple locations, evenly distributed at the corners below the axis of the mold, but in most cases they are arranged toward the bottom corner of the cylindrical mold. Sufficiently good results can often be obtained by providing a single ingot, and this is particularly optimal in the case of cylindrical ingots.
気体は、空気、窒素、その他アルゴン等の不活
性ガスがいずれも乾燥状態で好適に使用しうる。 As the gas, air, nitrogen, or another inert gas such as argon can be suitably used in a dry state.
本発明の方法および装置を実施例に基づき図面
を参照して以下説明するが、本発明はこれに限定
されるものではない。第１図は本発明を実施した
水平連続鋳造装置の要部縦断面を示す。アルミニ
ウム合金製鋳型１は環状冷却水ジヤケツト２によ
り冷却された円筒状内周面３を有する。アルミニ
ウム合金溶湯が図示していない溶解保持炉および
必要に応じて脱ガス脱滓装置を経由してタンデイ
ツシユ１０内の所定のレベル１０ａに溜められ
る。溶湯は該出口１１から必要に応じて耐火性導
管（図示してない）を介して耐火物製板体７の金
属溶湯流入口８を経由して鋳型１に流入し９に溜
る。溶湯９の外周は強制冷却された円筒状内周面
に接触して冷却され凝固殻を形成し、それを厚く
しながら鋳型下流端に引き抜かれ、冷却スプレー
１１の供給により直接冷却されて鋳肌１５を有す
る柱状凝固鋳塊１４が形成される。常法に従つて
潤滑油が給油管５ｂより鋳型内分配管を経て鋳型
内周面３に供給される。この実施例において、本
発明の構成は円筒状鋳型の軸芯１ａより下方の、
耐火物製板体７と円筒状鋳型内周面３によつて形
成された隅部に気体圧を印加した空間６を形成せ
しめ、金属溶湯９と鋳型内周面３の接触位置を下
流域に偏移させたところにある。
The method and apparatus of the present invention will be described below based on examples and with reference to the drawings, but the present invention is not limited thereto. FIG. 1 shows a vertical cross-section of a main part of a horizontal continuous casting apparatus embodying the present invention. An aluminum alloy mold 1 has a cylindrical inner circumferential surface 3 cooled by an annular cooling water jacket 2 . Molten aluminum alloy is stored at a predetermined level 10a in the tundish 10 via a melting and holding furnace (not shown) and a degassing and descaling device as required. The molten metal flows from the outlet 11 into the mold 1 via the molten metal inlet 8 of the refractory plate 7 via a refractory conduit (not shown) as required, and accumulates in the mold 9. The outer circumference of the molten metal 9 comes into contact with the forcedly cooled cylindrical inner circumferential surface and is cooled to form a solidified shell, which is drawn out to the downstream end of the mold while thickening, and is directly cooled by the supply of cooling spray 11 to form a cast surface. A columnar solidified ingot 14 having a diameter of 15 is formed. In accordance with a conventional method, lubricating oil is supplied from the oil supply pipe 5b to the inner circumferential surface 3 of the mold via the distribution pipe within the mold. In this embodiment, the structure of the present invention is that the structure of the present invention is as follows:
A space 6 to which gas pressure is applied is formed in the corner formed by the refractory plate 7 and the cylindrical mold inner circumferential surface 3, and the contact position between the molten metal 9 and the mold inner circumferential surface 3 is moved to the downstream region. It's in a place where it's shifted.
第２図は第１図の鋳型の軸芯より下方の上流端
付近の拡大図で、耐火物製板体７は、耐火断熱性
を有しアルミニウム合金溶湯に濡れず、耐食性を
有する材料として周知の市販の商品名マリナイト
を機械切削加工により仕上げ成形したものであ
る。潤滑油は給油管５ｂより環状分配管５b1を経
て給油スリツト５b2を通り、そこから鋳型下流端
に向けて円筒状鋳型内周面３に流れ出してし濡ら
す。 Fig. 2 is an enlarged view of the vicinity of the upstream end below the axis of the mold shown in Fig. 1, and the refractory plate 7 is well-known as a material that has fireproof insulation properties, does not get wet with molten aluminum alloy, and has corrosion resistance. This product is finished molded from commercially available product name Marinite by mechanical cutting. The lubricating oil passes through the oil supply pipe 5b, the annular distribution pipe 5b1, the oil supply slit 5b2 , and flows out from there toward the downstream end of the mold onto the inner circumferential surface 3 of the cylindrical mold to wet it.
気体としては圧縮空気を使用し、図示してない
気体調整装置により調圧および一定流量に調整し
て気体導入管５ａより鋳型１内の細管５a1を経て
鋳型上流端面と耐火物製板体の当接面間のスリツ
ト５a2より鋳型内隅部に導入し、この位置におけ
る金属溶湯の静水圧相当の圧力（鋳型底部よりタ
ンデイツシユ内溶湯レベル１０ａまでの高さに近
い）を印加し、導入空気流量を予め設定した値に
調節しこれを維持する。 Compressed air is used as the gas, and the pressure is regulated and the flow rate is adjusted to a constant level by a gas regulator (not shown), and the air is passed from the gas introduction pipe 5a through the thin tube 5a1 in the mold 1 to the upstream end face of the mold and the refractory plate. The introduced air is introduced into the inner corner of the mold through the slit 5a2 between the contact surfaces, and a pressure equivalent to the hydrostatic pressure of the molten metal at this position (close to the height from the bottom of the mold to the molten metal level 10a in the tundish) is applied. Adjust the flow rate to a preset value and maintain it.
給油スリツト５b2および気体導入スリツト５a2
のクリアランスはいづれも金属溶湯が差し込まな
い程度とし、これは金属溶湯の種類、温度によつ
て異るが、アルミニウムまたはその合金にあつて
は一般にＮ／10〜Ｎ／100mmである。 Oil supply slit 5b 2 and gas introduction slit 5a 2
The clearance is such that the molten metal cannot be inserted, and this varies depending on the type and temperature of the molten metal, but in the case of aluminum or its alloys, it is generally N/10 to N/100 mm.
第３図は、第１図のＡ−A′方向断面から見た
円筒状鋳型の側面図で気体導入管５ａより導入し
た気体は鋳型の底部に向けて開いた気体導入スリ
ツト５a2より鋳型内隅部に通じている。給油管５
ｂは、鋳型の頂部と底部の２ヶ所より環状分配管
５b1よりスリツトを経て円筒状鋳型の周面に均等
に給油される。 FIG. 3 is a side view of the cylindrical mold seen from the A- A ' direction cross section in FIG. It leads to the corner. Oil supply pipe 5
Oil b is uniformly supplied to the circumferential surface of the cylindrical mold through a slit from an annular distribution pipe 5b1 from two locations at the top and bottom of the mold.
第４図は第１図の耐火物製板体７の鋳型側から
見た側面図で、気体圧を印加した空間６は図のよ
うに円筒状鋳型の垂直軸芯を中心として鋳型底部
に形成されている。 Fig. 4 is a side view of the refractory plate 7 shown in Fig. 1 as seen from the mold side, and the space 6 to which gas pressure is applied is formed at the bottom of the mold around the vertical axis of the cylindrical mold as shown in the figure. has been done.
第５図は、本発明の別の実施態様における円筒
状鋳型上流端の底部近傍の拡大図で、鋳型軸芯よ
り下方の隅部の内側に耐火物製板体７から張り出
した庇部１６を設け、スリツト５a2より導入した
気体が、底部１６の下に溜つて気体圧を印加した
空間６を形成するようにしたものである。第６図
は第５図の耐火物製板体７の鋳型側から見た側面
図で、気体圧印加空間６は、上記張り出し部分の
下分を削り取つて成形した凹部によつて予め設定
した形状の空間としたものであり、空間形状の特
定化ができると共に、気体圧印加空間６から気体
のオーバーフローを防止でき、一定の気体圧空間
に維持し易くすることができる。 FIG. 5 is an enlarged view of the vicinity of the bottom of the upstream end of a cylindrical mold in another embodiment of the present invention, showing an eaves portion 16 projecting from the refractory plate 7 inside the corner below the mold axis. The gas introduced through the slit 5a2 accumulates under the bottom 16 to form a space 6 to which gas pressure is applied. FIG. 6 is a side view of the refractory plate 7 shown in FIG. 5 as seen from the mold side, and the gas pressure application space 6 is preset by a recess formed by cutting off the lower part of the above-mentioned overhanging part. The shape of the space can be specified, and the gas can be prevented from overflowing from the gas pressure application space 6, making it easier to maintain a constant gas pressure space.
第７図は、上記第５図の庇部１６の先端に、鋳
型内周面方向に向けて突起部１７を設けた実施例
であり、第７図の例より気体圧空間６からの気体
のオーバーフローを防止する効果は一層強化され
る。 FIG. 7 shows an embodiment in which a protrusion 17 is provided at the tip of the eaves 16 shown in FIG. 5 above toward the inner circumferential surface of the mold. The effect of preventing overflow is further strengthened.
第８図は、角柱状鋳塊の水平連結鋳造に本発明
を適用した実施例を示したものであり、そのａは
要部縦断面、そのｂは耐火物製板体７の鋳型側か
ら見た側面図である。図のａには、角筒状鋳型の
軸芯１ａより下方に耐火物製板体を張り出し、そ
の鋳型内周面に近い隅部を削除して気体圧印加空
間６および庇部１６を形成する。図のｂには気体
圧印加空間が、角筒状鋳型の底面全域および側面
の一部に及んでいることを示す。角柱状鋳塊の水
平連結鋳造においては、円柱状鋳塊の場合と異り
鋳型底面全域の隅部に気体圧を印加することが望
ましい。 FIG. 8 shows an embodiment in which the present invention is applied to horizontally connected casting of a prismatic ingot, in which a is a vertical cross-section of the main part, and b is a view of the refractory plate 7 from the mold side. FIG. In the figure a, a refractory plate is extended below the axis 1a of a rectangular cylindrical mold, and the corners near the inner peripheral surface of the mold are removed to form a gas pressure application space 6 and an eaves part 16. . Figure b shows that the gas pressure application space extends over the entire bottom surface and part of the side surfaces of the rectangular cylindrical mold. In horizontally connected casting of a prismatic ingot, unlike the case of a cylindrical ingot, it is desirable to apply gas pressure to the corners of the entire bottom surface of the mold.
本発明の方法および装置により、アルミニウム
合金AA6063（第１図の方法、装置を適用）、およ
びアルミニウム合金AA5056（第５図の方法、装
置を適用）の各々直径２インチ、および８インチ
のビレツトを水平連続鋳造した結果、いづれも、
ブレークアウト等の操業上のトラブルがなく、か
つ全周均質の平滑鋳肌で、内部の冶金的組織も均
一な良品質の製品が得られる。これに比し、気体
圧を印加しない、従来法による水平連続鋳造で
は、底面に焼付き模様が顕著に現われた鋳肌のビ
レツトが形成され、かつ内部組織も凝固中心位置
が、上方に偏移した不均質なものであつた。 By the method and apparatus of the present invention, aluminum alloy AA6063 (applying the method and apparatus shown in FIG. 1) and aluminum alloy AA5056 (applying the method and apparatus shown in FIG. 5) billets with a diameter of 2 inches and 8 inches, respectively, are produced. As a result of horizontal continuous casting,
A high-quality product with no operational troubles such as breakouts, a smooth casting surface that is uniform all around, and a uniform internal metallurgical structure can be obtained. In contrast, in horizontal continuous casting using the conventional method without applying gas pressure, a billet with a cast surface with a noticeable burn pattern on the bottom surface is formed, and the solidification center position of the internal structure shifts upward. It was a heterogeneous thing.
前記実施例においても述べたように、金属、特
にアルミニウムまたはその合金のごとき軽金属の
水平連続鋳造において、本発明の方法および装置
を適用すれば、従来法に比して、得られる鋳塊の
鋳肌が全周にわたつて平滑均一で塑性加工前の表
皮削除が少くて済み、また凝固中心が偏移するこ
となく全断面均質な組織の鋳塊が得られる。また
冷却が全周均一化し潤滑液の廻りも良く焼きつき
によるブレークアウト等の操業トラブルもほとん
ど発生しなくなる等、生産性向上、コスト低減に
も貢献度が大きい。
As mentioned in the above embodiments, if the method and apparatus of the present invention are applied to the horizontal continuous casting of metals, especially light metals such as aluminum or its alloys, the resulting ingot will be cast more easily than the conventional method. The skin is smooth and uniform over the entire circumference, requiring less removal of the skin before plastic working, and the solidification center does not shift, making it possible to obtain an ingot with a homogeneous structure throughout the entire cross section. In addition, the cooling is uniform all around, the lubricating fluid is well distributed, and there are almost no operational problems such as breakouts due to seizure, which greatly contributes to improving productivity and reducing costs.
第１図は、本発明に係る一具体例（円柱状鋳
塊）を示す縦断面図、第２図は第１図の装置の鋳
型の軸芯より下方の上流端付近の拡大図、第３図
は第１図の装置のＡ−A′方向断面から見た鋳型
の側面図、第４図は第１図の耐火物製板体の鋳型
側から見た側面図、第５図は、本発明の別の具体
例（円柱状鋳塊）を示す要部縦断面図、第６図は
第５図の耐火物製板体の鋳型側から見た側面図、
第７図は第５図の庇部の改良縦面図、第８図は、
本発明を角柱状鋳塊の水平連続鋳造に適用した具
体例を示す縦断面図ａおよびその場合の耐火物製
板体の鋳型側から見た側面図ｂである。
１……強制冷却された筒状鋳型、１ａ……鋳型
軸芯、３……鋳型内周面、４……鋳型蒸留端、５
ａ……気体導入管、５ｂ……給油管、６……気体
圧印加空間、７……耐火物製板体、９……鋳型内
金属溶湯、１０……タンデイツシユ、１６……庇
部、１７……庇部の突起部。
FIG. 1 is a vertical cross-sectional view showing one specific example (cylindrical ingot) according to the present invention, FIG. 2 is an enlarged view of the device shown in FIG. 1 near the upstream end below the axis of the mold, and FIG. The figure is a side view of the mold seen from the A-A' direction cross section of the apparatus in Figure 1, Figure 4 is a side view of the refractory plate body in Figure 1 seen from the mold side, and Figure 5 is the main body. FIG. 6 is a side view of the refractory plate shown in FIG. 5 as seen from the mold side;
Figure 7 is an improved vertical view of the eaves in Figure 5, and Figure 8 is a
FIG. 1 is a longitudinal cross-sectional view a showing a specific example in which the present invention is applied to horizontal continuous casting of a prismatic ingot, and a side view b of the refractory plate body viewed from the mold side in that case. DESCRIPTION OF SYMBOLS 1... Forced cooling cylindrical mold, 1a... Mold axis, 3... Mold inner peripheral surface, 4... Mold distillation end, 5
a... Gas introduction pipe, 5b... Oil supply pipe, 6... Gas pressure application space, 7... Refractory plate, 9... Molten metal in mold, 10... Tandate, 16... Eave part, 17 ...The protrusion of the eaves.
Claims (1)
流端に、金属溶湯流入口を開口した耐火物製板体
を挟んでタンデイツシユの金属溶湯出口を接続
し、該耐火物製板体が該筒状鋳型の内周面より内
側に張出して隅部を形成し、前記タンデイツシユ
から流入させた金属溶湯を前記筒状鋳型内におい
て柱状または中空状に保持して凝固させる工程を
含む金属の水平連続鋳造法において、前記筒状鋳
型の軸芯より下方の前記隅部に気体を導入して気
体圧を印加した空間を形成せしめ、金属溶湯と前
記筒状鋳型内周面との水平方向の接触位置を下流
端側に偏移せしめて冷却量を制限することを特徴
とする金属の水平連続鋳造法。 ２ 前記気体が空気、窒素または不活性ガスであ
ることを特徴とする特許請求の範囲第１項記載の
金属の水平連続鋳造法。 ３ 前記気体圧が、前記筒状鋳型の内周底部の位
置における金属溶湯の静水圧に依存して定められ
ることを特徴とする特許請求の範囲第１項記載の
金属の水平連続鋳造法。 ４ 強制冷却され、水平に置かれた筒状鋳型の上
流端に、金属溶湯流入口を開口した耐火物製板体
を挟んでタンデイツシユの金属溶湯出口を接続
し、該耐火物製板体が該筒状鋳型の内周面より内
側に張り出して隅部を形成している金属の水平連
続鋳造装置において、前記筒状鋳型の軸芯より下
方の前記隅部に気体導入開口が設けられ、該気体
導入開口は前記金属溶湯が侵入しなうように定め
られ、かつ気体供給源に連通してなることを特徴
とする金属の水平連続鋳造装置。 ５ 前記筒状鋳型の軸芯より下方の前記隅部の内
側に前記耐火物製板体から張り出した庇部を有す
ることを特徴とする特許請求の範囲第４項記載の
金属の水平連続鋳造装置。 ６ 前記気体導入口が、前記筒状鋳型の最底部の
前記隅部に向けて設けられていることを特徴とす
る特許請求の範囲第４項記載の金属の水平連続鋳
造装置。[Scope of Claims] 1. The molten metal outlet of a tundish is connected to the upstream end of a horizontally placed cylindrical mold that is forcedly cooled, with a refractory plate having an open molten metal inlet, and the molten metal outlet of a tundish A process in which a product plate extends inward from the inner circumferential surface of the cylindrical mold to form a corner, and the molten metal flowing from the tundish is held in a columnar or hollow shape within the cylindrical mold and solidified. In the horizontal continuous casting method for metals, gas is introduced into the corner below the axis of the cylindrical mold to form a space where gas pressure is applied, and the molten metal and the inner circumferential surface of the cylindrical mold are A horizontal continuous metal casting method characterized by shifting the horizontal contact position of the metal toward the downstream end to limit the amount of cooling. 2. The horizontal continuous metal casting method according to claim 1, wherein the gas is air, nitrogen, or an inert gas. 3. The horizontal continuous metal casting method according to claim 1, wherein the gas pressure is determined depending on the hydrostatic pressure of the molten metal at the bottom of the inner periphery of the cylindrical mold. 4 Connect the molten metal outlet of the tundish to the upstream end of a cylindrical mold that is forcedly cooled and placed horizontally, with a refractory plate with an open molten metal inlet opened, and connect the molten metal outlet of the tundish In a metal horizontal continuous casting apparatus in which a corner is formed by projecting inward from the inner peripheral surface of a cylindrical mold, a gas introduction opening is provided in the corner below the axis of the cylindrical mold, and a gas introduction opening is provided in the corner below the axis of the cylindrical mold. 1. A horizontal continuous metal casting apparatus, characterized in that the introduction opening is defined to prevent the molten metal from entering and communicates with a gas supply source. 5. The metal horizontal continuous casting apparatus according to claim 4, further comprising an eave portion projecting from the refractory plate body inside the corner portion below the axis of the cylindrical mold. . 6. The metal horizontal continuous casting apparatus according to claim 4, wherein the gas inlet is provided toward the bottom corner of the cylindrical mold.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19175284A JPS6171157A (en) | 1984-09-14 | 1984-09-14 | Method and device for horizontal and continuous casting of metal |
| NZ209807A NZ209807A (en) | 1984-07-27 | 1984-10-08 | Horizontal continuous casting of metal |
| GB08518314A GB2163685B (en) | 1984-07-27 | 1985-07-19 | Horizontal continuous casting of metal |
| US06/757,096 US4653571A (en) | 1984-07-27 | 1985-07-19 | Method for horizontal continuous casting of a metal, where the lower mold/cast metal contact point is horizontally displaced |
| DE3526689A DE3526689C2 (en) | 1984-07-27 | 1985-07-25 | Method and device for horizontal continuous casting of metal |
| FR8511486A FR2568153B1 (en) | 1984-07-27 | 1985-07-26 | IMPROVED METHOD AND DEVICE FOR HORIZONTAL AND CONTINUOUS CASTING OF METAL |
| US06/907,908 US4688624A (en) | 1984-07-27 | 1986-09-16 | Apparatus for horizontal continuous casting of metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19175284A JPS6171157A (en) | 1984-09-14 | 1984-09-14 | Method and device for horizontal and continuous casting of metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6171157A JPS6171157A (en) | 1986-04-12 |
| JPH054170B2 true JPH054170B2 (en) | 1993-01-19 |
Family
ID=16279911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19175284A Granted JPS6171157A (en) | 1984-07-27 | 1984-09-14 | Method and device for horizontal and continuous casting of metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6171157A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69131792T2 (en) * | 1990-08-09 | 2000-05-31 | Kawasaki Jukogyo K.K., Kobe | Process and device for continuous casting |
| WO2008084706A1 (en) * | 2006-12-27 | 2008-07-17 | Showa Denko K.K. | Horizontal continuous casting method and horizontal continuous casting device |
-
1984
- 1984-09-14 JP JP19175284A patent/JPS6171157A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6171157A (en) | 1986-04-12 |
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