JPH0221901B2 - - Google Patents

Info

Publication number
JPH0221901B2
JPH0221901B2 JP56201597A JP20159781A JPH0221901B2 JP H0221901 B2 JPH0221901 B2 JP H0221901B2 JP 56201597 A JP56201597 A JP 56201597A JP 20159781 A JP20159781 A JP 20159781A JP H0221901 B2 JPH0221901 B2 JP H0221901B2
Authority
JP
Japan
Prior art keywords
mold
ingot
molten metal
dummy
outlet
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
Application number
JP56201597A
Other languages
Japanese (ja)
Other versions
JPS58103940A (en
Inventor
Atsumi Oono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OCC CO Ltd
Original Assignee
OCC CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by OCC CO Ltd filed Critical OCC CO Ltd
Priority to JP20159781A priority Critical patent/JPS58103940A/en
Publication of JPS58103940A publication Critical patent/JPS58103940A/en
Publication of JPH0221901B2 publication Critical patent/JPH0221901B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/14Plants for continuous casting
    • B22D11/145Plants for continuous casting for upward casting

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、鋳塊の連続鋳造方法に関し、より詳
しくは、中空鋳型の溶湯面に浸漬して、その中空
部の出口上端が湯面又はそれ以下の高さになるよ
うに保持することにより、あらゆる種類の金属お
よび合金に用いてもその鋳塊表面は鋳型の出口の
直上で凝固が開始されるように引上げ、従つて、
凝固殻が直接鋳型内壁面上において形成せず、鋳
型中空部の断面形状によつて定まる任意の形状の
鋳塊を、連続的に製造できる方法に関するもので
ある。
Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for continuous casting of an ingot, and more specifically, the present invention relates to a method for continuous casting of an ingot, and more specifically, it is immersed in the molten metal surface of a hollow mold so that the upper end of the outlet of the hollow part is at the molten metal surface or the molten metal surface. By holding the ingot below this height, the surface of the ingot is raised so that solidification begins just above the exit of the mold, even when used with all types of metals and alloys.
The present invention relates to a method in which a solidified shell is not formed directly on the inner wall surface of the mold, and an ingot having an arbitrary shape determined by the cross-sectional shape of the hollow part of the mold can be continuously produced.

尚、本明細書で用いた用語「鋳型」は、鋳型中
で溶湯を凝固せしめ鋳塊や鋳物をつくるという従
来の鋳型の概念とは異なり、鋳型内では溶湯は凝
固殻を形成せず、鋳型の出口において、やがて鋳
塊として凝固すべき溶湯の形状を整えるための型
を意味するものである。
Note that the term "mold" used in this specification differs from the conventional concept of a mold in which molten metal is solidified in the mold to produce an ingot or casting. A mold used to shape the molten metal that will eventually solidify as an ingot at the exit of the ingot.

(従来の技術及び発明が解決しようとする問題
点) 一般に、鋳塊の表面は通常完全な平滑面ではな
く、凸凹を有し、またしばしば局部的な亀裂を有
するものであり、特に連続鋳造方法によると鋳塊
が鋳型内を移動する際の鋳塊表面と鋳型内壁面と
の摩擦によつて、表面模様や亀裂などの表面欠陥
が生じやすく、このような表面欠陥を除くため
に、連続鋳造方法により得られた鋳塊は通常、鍛
造、圧延などの塑性加工にさきだつて、表面の溶
削、研削またはきず取り等の処理が行なわれる。
また表面の亀裂が深いときは、その鋳塊は後処理
の塑性加工を行つても製品に「きず」が残るため
不良品として排除される。
(Prior art and problems to be solved by the invention) In general, the surface of an ingot is not a perfectly smooth surface, but has irregularities, and often has local cracks, especially in continuous casting methods. According to the study, surface defects such as surface patterns and cracks are likely to occur due to friction between the ingot surface and the inner wall surface of the mold as the ingot moves through the mold.In order to remove such surface defects, continuous casting The ingot obtained by this method is usually subjected to surface treatments such as melting, grinding, or flaw removal prior to plastic working such as forging and rolling.
Furthermore, if the cracks on the surface are deep, the ingot will be rejected as a defective product because "scratches" will remain on the product even after post-processing plastic working.

従つて表面欠陥のない鋳塊を製造することは、
溶削や研削等の工程の省略、鋳塊の歩留まりの向
上の上から極めて望まれるところであつた。
Therefore, producing an ingot without surface defects requires
This was highly desired from the standpoint of omitting processes such as melting and grinding and improving the yield of ingots.

銅の連続鋳造等においては、通常鋳造鋳型は摺
動することが必要とされている。これは、もし鋳
型が摺動しなければ鋳型の内壁面に溶湯の凝固殻
が附着して、凝固殻の鋳型出口に向う移動が妨げ
られ、凝固殻の破壊に伴ういわゆるブレークアウ
トが起り、凝固殻に囲まれた内部の未凝固溶湯が
噴出してしまうという重大事態が発生するからで
ある。このようなブレークアウトは、特に、凝固
温度範囲の大きな合金、例えば、鋳鉄や、硫黄濃
度の高い鋼に起りやすく、従つてこのような合金
の連続鋳造は至難とされている一方で、連続鋳造
方法の開発は、強く望まれている現状であつた。
In continuous casting of copper, etc., it is usually necessary for the casting mold to slide. This is because if the mold does not slide, the solidified shell of the molten metal will adhere to the inner wall surface of the mold, preventing the solidified shell from moving toward the mold outlet, and a so-called breakout will occur due to the destruction of the solidified shell, resulting in solidification. This is because a serious situation may occur in which the unsolidified molten metal inside the shell is spouted out. Such breakouts are particularly likely to occur in alloys with a wide solidification temperature range, such as cast iron or steel with a high sulfur concentration.Continuous casting of such alloys is therefore considered extremely difficult; The development of a method is currently strongly desired.

本発明はあらゆる種類の金属及び合金に対し、
表面欠陥のない平滑な表面を有する鋳塊を得るこ
とができる連続鋳造方法を提供することを目的と
する。
The present invention applies to all kinds of metals and alloys.
An object of the present invention is to provide a continuous casting method capable of obtaining an ingot having a smooth surface without surface defects.

(問題を解決するための手段) すなわち、本発明は、上端に鋳塊引出しのため
の出口開口を有する鋳塊を該鋳型の出口開口端が
略溶湯面又はそれ以下の高さになるように溶湯保
持炉内の溶湯に浸漬し、溶湯の熱によつて鋳型内
壁面の温度を鋳造金属の凝固温度以上に保持し、
この鋳型中での溶湯は凝固殻を形成せず、鋳型の
出口において鋳型内の溶湯面に溶湯の凝固温度以
下の温度に保持され且つ鋳型出口形状に略一致す
る断面形状を有する鋳塊ダミーを接触させた後、
該鋳塊ダミーを冷却して鋳塊ダミーの先端に連続
的に金属凝固体を形成させ、次いで鋳塊ダミーを
引上げつつ鋳塊表面を冷却することを特徴とする
鋳塊の連続鋳造方法を要旨とするものである。
(Means for Solving the Problem) That is, the present invention provides an ingot having an outlet opening for drawing out the ingot at the upper end so that the outlet opening end of the mold is at approximately the level of the molten metal level or lower. It is immersed in molten metal in a molten metal holding furnace, and the temperature of the inner wall surface of the mold is maintained at a temperature higher than the solidification temperature of the cast metal by the heat of the molten metal.
The molten metal in this mold does not form a solidified shell, and at the exit of the mold, an ingot dummy is formed on the surface of the molten metal in the mold, which is maintained at a temperature below the solidification temperature of the molten metal and has a cross-sectional shape that substantially matches the shape of the mold exit. After contacting
Summary of a method for continuous casting of an ingot, characterized by cooling the ingot dummy to continuously form a metal solidified body at the tip of the ingot dummy, and then cooling the ingot surface while pulling up the ingot dummy. That is.

(作用) 第1図は、本発明に係る連続鋳造方法を実施す
る装置の一実施例を示す縦断面正面図である。
(Function) FIG. 1 is a longitudinal sectional front view showing an embodiment of an apparatus for carrying out the continuous casting method according to the present invention.

1は溶湯保持炉、2は溶湯で、湯面は図示しな
い一般的手段により一定に保持されている。3は
鋳型で、その中空の出口上端は溶湯2の湯面又は
それ以下になるように浸漬保持されており、鋳型
3の上面外周には溶湯の流入を防ぐための堤防の
働きをする縁4が設けられ、且つ鋳型3は支持具
5により一定位置に支持されている。6は鋳塊1
0のダミーであつて鋳型3の出口の形状に略一致
する断面形状を有し、鋳塊10は冷却材スプレー
7から射出される。空気、ガス、霧、水などによ
つて冷却される。8は溶湯の輻射熱を防ぐための
遮蔽板である。
1 is a molten metal holding furnace, 2 is a molten metal, and the level of the molten metal is maintained constant by general means (not shown). Reference numeral 3 denotes a mold, which is immersed and held so that the upper end of its hollow outlet is at or below the level of the molten metal 2. On the outer periphery of the upper surface of the mold 3, there is a rim 4 that acts as a dike to prevent the molten metal from flowing in. is provided, and the mold 3 is supported in a fixed position by a support 5. 6 is ingot 1
The ingot 10 is a dummy of 0 and has a cross-sectional shape that substantially matches the shape of the outlet of the mold 3, and the ingot 10 is injected from the coolant spray 7. Cooled by air, gas, fog, water, etc. 8 is a shielding plate for preventing radiant heat from the molten metal.

本発明では、鋳塊ダミー6を鋳型3の中空部の
湯面に接触せしめた後、鋳塊ダミー6を冷却して
ピンチロール9の回転によつて引上げることによ
つて、鋳塊10を得ることができるのである。
In the present invention, the ingot 10 is made by bringing the ingot dummy 6 into contact with the molten metal surface in the hollow part of the mold 3, cooling the ingot dummy 6, and pulling it up by the rotation of the pinch rolls 9. You can get it.

本発明においては、鋳型内に供給された溶湯
が、鋳型内では内壁面に凝固殻を形成せず、鋳型
の中空部の出口上端直外で表面が凝固し始め、鋳
型内壁面との摩擦による鋳塊表面の引つ掻ききず
が生じないように、諸因子をコントロールする必
要がある。これらの諸因子としては、鋳造する金
属または合金の凝固温度、保持炉内の溶湯の温
度、鋳塊の冷却及び引上げ速度、鋳塊の大きさ等
があるが、特に鋳塊の冷却と鋳塊の引上げ条件
は、重要な因子で、引上げ速度に比して、冷却の
程度が大きすぎると、鋳造金属は鋳型内で凝固し
て鋳型内壁面に附着し、鋳型を破壊する危険性が
存在する。従つて、鋳塊の冷却速度と引上げ速度
のコントロールは、注意深く行わなければならな
い。
In the present invention, the molten metal supplied into the mold does not form a solidified shell on the inner wall surface in the mold, but the surface begins to solidify just outside the upper end of the outlet of the hollow part of the mold, and due to friction with the inner wall surface of the mold, Various factors need to be controlled to avoid scratches on the surface of the ingot. These factors include the solidification temperature of the metal or alloy to be cast, the temperature of the molten metal in the holding furnace, the cooling and pulling rate of the ingot, and the size of the ingot. The pulling conditions are an important factor; if the degree of cooling is too large compared to the pulling speed, there is a risk that the cast metal will solidify within the mold and adhere to the inner wall of the mold, destroying the mold. . Therefore, the cooling rate and pulling rate of the ingot must be carefully controlled.

本発明の方法によれば、内部組織は長く伸びた
柱状晶からなるフアイバー組織になり、磁石や珪
素鋼板、共晶複合材のごとく一方向凝固組織を必
要とする材料を得るにきわめて好適である。
According to the method of the present invention, the internal structure becomes a fiber structure consisting of elongated columnar crystals, which is extremely suitable for obtaining materials that require a unidirectional solidification structure, such as magnets, silicon steel plates, and eutectic composite materials. .

(実施例) 次に本発明の実施例を以下に示す。(Example) Next, examples of the present invention will be shown below.

実施例 1 第1図に示す装置において、内径10mm、外径20
mm、高さ50mmの炭化珪素製の上下開口した円筒形
の鋳型の出口上端が、溶湯保持炉内のAl−33%
Cu合金の湯面に一致するようにして設置し、鋳
塊引上量に見合うように湯面保持炉には溶湯を連
続的に補給し、捕給された溶湯により鋳型内壁面
の温度が560゜に保持されるようにし、先端が突出
せる鋳型内径とほぼ均しい径を有する、Al製の
ダミーを鋳型内のAl−33%Cu合金の湯面に接触
させた後、鋳型上80mmの位置でスプレーより毎分
100c.c.の水量で水冷しつつ毎分50mmの引上げ速度
で引上げたところ、ダミー下端に連続的にきわめ
て美麗な鋳肌をもつたAl−33%Cu合金の丸棒状
の一方向凝固鋳塊をうることができた。
Example 1 In the device shown in Fig. 1, the inner diameter is 10 mm and the outer diameter is 20 mm.
The upper end of the outlet of a cylindrical silicon carbide mold with a height of 50 mm and an upper and lower opening is located at the Al-33% inside the molten metal holding furnace.
The mold is installed so that it matches the level of the Cu alloy, and the molten metal is continuously replenished into the molten metal level holding furnace to match the amount of ingot pulled up. After touching the Al-33% Cu alloy molten metal surface in the mold with an Al dummy that has a diameter that is almost the same as the inside diameter of the mold so that the tip can protrude, the dummy is held at a position of 80 mm above the mold. Spray more per minute
When the dummy was cooled with water at a volume of 100 c.c. and pulled at a pulling speed of 50 mm per minute, a round rod-shaped unidirectionally solidified ingot of Al-33% Cu alloy with an extremely beautiful continuous casting surface on the lower end of the dummy was obtained. I was able to obtain

実施例 2 第1図に示す装置において、内径15mm、外径20
mm、高さ4mmの黒鉛製の上下開口した円筒形の鋳
型を、その出口内壁が5%Snリン青銅
(Cu94.75Wt%、Sn5Wt%、P0.25Wt%)の溶湯
の湯面に一致するようにして設置し、溶湯保持炉
の溶湯は鋳塊の引上量に見合うように連続的に補
給し、溶湯保持炉内及びCu鋳型上面は窒素雰囲
気に保持し、補給された溶湯により鋳型内壁面の
温度が1085℃に保持されるようにし、外径15mmの
Cu製のダミーの先端を鋳型内のリン青銅溶湯の
湯面に接触させた後、鋳型上80mmの位置でスプレ
ーにより毎分100c.c.の水量で水冷しつつ毎分50mm
の引上げ速度で引上げたところ、ダミー下端に連
続的にきわめて美麗な鋳肌をもつたリン青銅の丸
棒状の一方向凝固鋳塊をうることができた。
Example 2 In the device shown in Fig. 1, the inner diameter is 15 mm and the outer diameter is 20 mm.
A cylindrical mold made of graphite with vertical openings and a height of 4 mm is placed so that the inner wall of the outlet matches the surface of the molten metal of 5% Sn phosphor bronze (Cu94.75Wt%, Sn5Wt%, P0.25Wt%). The molten metal in the molten metal holding furnace is continuously replenished to match the amount of ingots pulled up, and the inside of the molten metal holding furnace and the top surface of the Cu mold are maintained in a nitrogen atmosphere, and the molten metal that is replenished causes the inner wall surface of the mold to with an outer diameter of 15 mm so that the temperature of the
After bringing the tip of the Cu dummy into contact with the surface of the phosphor bronze molten metal in the mold, it is sprayed at a position 80 mm above the mold at a rate of 100 c.c. per minute while cooling at a rate of 50 mm per minute.
When the dummy was pulled at a pulling speed of , it was possible to obtain a unidirectionally solidified ingot in the shape of a round rod of phosphor bronze with a continuous and extremely beautiful casting surface at the lower end of the dummy.

尚、上記実施例においては特に丸棒の製造につ
いて説明したが、本発明はこれに限らず用いる鋳
型の中空部の断面形状によつて線、板及び管等各
種形状の鋳塊が溶湯から直接製造することができ
る。
In the above embodiments, the manufacturing of round bars has been explained in particular, but the present invention is not limited to this, and ingots of various shapes such as wires, plates, and pipes can be directly produced from the molten metal depending on the cross-sectional shape of the hollow part of the mold used. can be manufactured.

例えば管を製造する場合には第2図に示すよう
に鋳型3の略中心部に鋳型3の内固壁と等間隔を
おいて円柱状の中子11を設け、該中子11を鋳
型3に梁12により固定し、その先端が管状とな
つたダミー6を用いて上記実施例と同じように引
上げることにより溶湯から直接に連続して管を製
造できる。
For example, in the case of manufacturing a tube, a cylindrical core 11 is provided approximately at the center of the mold 3 at equal intervals to the inner solid wall of the mold 3, as shown in FIG. A pipe can be manufactured directly and continuously from the molten metal by fixing it with a beam 12 and pulling it up in the same manner as in the above embodiment using a dummy 6 whose tip has a tubular shape.

(発明の効果) 本発明の方法が特に従来の鋳塊の連続鋳造方法
に比してすぐれている点は、鋳型の出口における
ブレークアウトによる溶湯噴出や鋳塊の表面亀裂
の発生のおそれなく、金属及び合金の線状、棒
状、板状及び管状の鋳塊の鋳造を行うことが可能
なことである。本発明は鋳塊の表面状態の改善に
きわめて有用であるのみでなく、従来の方法にお
いて必要とされてきた鋳型の摺動のための附加的
装置やエネルギーが不必要になり、また従来の鋼
塊の連続鋳造においては、鋳型と鋼塊の潤滑のた
めに用いられたガラス質の湯面添加材が不必要に
なる等の利点があり、鋳塊の鋳造にとつて画期的
なものである。
(Effects of the Invention) The method of the present invention is particularly superior to conventional continuous casting methods for ingots. It is possible to cast linear, rod-shaped, plate-shaped and tubular ingots of metals and alloys. The present invention is not only extremely useful for improving the surface condition of ingots, but also eliminates the need for additional equipment and energy for mold sliding, which were required in conventional methods, and Continuous casting of ingots has the advantage of eliminating the need for vitreous surface additives, which were used to lubricate the mold and steel ingot, and is a breakthrough in the casting of ingots. be.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る連続鋳造方法を実施する
装置の一実施例の要部縦断面図、第2図は他の実
施例の同じく要部縦断面図である。 1…溶湯保持炉、2…溶湯、3…鋳型、4…鋳
型の縁、5…支持具、6…鋳塊ダミー、7…冷却
材スプレー、8…遮蔽板、9…ピンチロール、1
0…鋳塊。
FIG. 1 is a longitudinal sectional view of an essential part of an embodiment of an apparatus for carrying out the continuous casting method according to the present invention, and FIG. 2 is a longitudinal sectional view of the essential part of another embodiment. 1... Molten metal holding furnace, 2... Molten metal, 3... Mold, 4... Mold edge, 5... Support tool, 6... Ingot dummy, 7... Coolant spray, 8... Shielding plate, 9... Pinch roll, 1
0...Ingot.

Claims (1)

【特許請求の範囲】[Claims] 1 上端に鋳塊引出しのための出口開口を有する
鋳塊を該鋳型の出口開口端が略溶湯面又はそれ以
下の高さになるように溶湯保持炉内の溶湯に浸漬
し、溶湯の熱によつて鋳型内壁面の温度を鋳造金
属の凝固温度以上に保持し、この鋳型中での溶湯
は凝固殻を形成せず、鋳型の出口において鋳型内
の溶湯面に溶湯の凝固温度以下の温度に保持され
且つ鋳型出口形状に略一致する断面形状を有する
鋳塊ダミーを接触させた後、該鋳塊ダミーを冷却
して鋳塊ダミーの先端に連続的に金属凝固体を形
成させ、次いで鋳塊ダミーを引上げつつ鋳塊表面
を冷却することを特徴とする鋳塊の連続鋳造方
法。
1. An ingot having an outlet opening at the upper end for drawing out the ingot is immersed in the molten metal in a molten metal holding furnace so that the outlet opening end of the mold is at approximately the level of the molten metal surface or lower, and is exposed to the heat of the molten metal. Therefore, the temperature of the inner wall surface of the mold is maintained above the solidification temperature of the cast metal, and the molten metal in this mold does not form a solidified shell, and at the outlet of the mold, the molten metal surface in the mold reaches a temperature below the solidification temperature of the molten metal. After contacting the ingot dummy which is held and has a cross-sectional shape that substantially matches the mold outlet shape, the ingot dummy is cooled to form a solidified metal continuously at the tip of the ingot dummy, and then the ingot is A method for continuous casting of an ingot, characterized by cooling the surface of the ingot while pulling up a dummy.
JP20159781A 1981-12-16 1981-12-16 Continuous casting method for cast ingot Granted JPS58103940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20159781A JPS58103940A (en) 1981-12-16 1981-12-16 Continuous casting method for cast ingot

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20159781A JPS58103940A (en) 1981-12-16 1981-12-16 Continuous casting method for cast ingot

Publications (2)

Publication Number Publication Date
JPS58103940A JPS58103940A (en) 1983-06-21
JPH0221901B2 true JPH0221901B2 (en) 1990-05-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP20159781A Granted JPS58103940A (en) 1981-12-16 1981-12-16 Continuous casting method for cast ingot

Country Status (1)

Country Link
JP (1) JPS58103940A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02205232A (en) * 1989-02-01 1990-08-15 Natl Res Inst For Metals Method and apparatus for drawing-up continuous casting
JP2014057980A (en) * 2012-09-18 2014-04-03 Toyota Motor Corp Pull up type continuous casting device and pull up type continuous casting method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171132A (en) * 1937-06-19 1939-08-29 Simons Aaron Method of forming elements from molten metal
US2955334A (en) * 1959-08-31 1960-10-11 Olin Mathieson Continuous casting
JPS5276277A (en) * 1975-12-22 1977-06-27 Agency Of Ind Science & Technol Producing long and narrow crystal
JPS5546265A (en) * 1978-09-28 1980-03-31 Furukawa Battery Co Ltd:The Manufacturing method of battery plate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171132A (en) * 1937-06-19 1939-08-29 Simons Aaron Method of forming elements from molten metal
US2955334A (en) * 1959-08-31 1960-10-11 Olin Mathieson Continuous casting
JPS5276277A (en) * 1975-12-22 1977-06-27 Agency Of Ind Science & Technol Producing long and narrow crystal
JPS5546265A (en) * 1978-09-28 1980-03-31 Furukawa Battery Co Ltd:The Manufacturing method of battery plate

Also Published As

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