JPH0525590B2 - - Google Patents
Info
- Publication number
- JPH0525590B2 JPH0525590B2 JP16233587A JP16233587A JPH0525590B2 JP H0525590 B2 JPH0525590 B2 JP H0525590B2 JP 16233587 A JP16233587 A JP 16233587A JP 16233587 A JP16233587 A JP 16233587A JP H0525590 B2 JPH0525590 B2 JP H0525590B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- steel ingot
- consumable electrode
- current collecting
- surface plate
- 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
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000035515 penetration Effects 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000007796 conventional method Methods 0.000 description 3
- 238000010304 firing Methods 0.000 description 2
- 101100165177 Caenorhabditis elegans bath-15 gene Proteins 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、複合鋼塊の製造方法とその装置に関
するもので、とくに、中空鋼塊の中空部あるいは
鋼塊の外周に、エレクトロスラブ再溶解によつて
金属を充てんして複合鋼塊を製造する方法および
装置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 manufacturing a composite steel ingot and an apparatus therefor. The present invention relates to a method and apparatus for manufacturing a composite steel ingot by filling it with metal.
中空鋼塊の中空部あるいは円柱鋼塊の外周を鋳
型で囲み、それによつて形成される空所をエレク
トロスラブ再溶解によつて充てんし、複合鋼塊を
製造する方法が、たとえば、特公昭51−23455号
公報あるいは特開昭59−73150号公報に記載され
ている。エレクトロスラブ再溶解は、前記空所内
のスラブ浴中に消耗電極の先端を挿入し、前記鋼
塊と電気的に結合された集電用端子によつて電流
をとり出しながら、スラグ浴を介して消耗電極と
集電用端子との間に通電することによつて行なわ
れる。つまり、スラグ浴のジユール熱により消耗
電極および鋼塊の空所壁面が溶解し、消耗電極の
溶融金属と鋼塊の溶融金属との混合物が空所を下
から上へと埋めていき、複合鋼塊が作られる。
For example, there is a method of manufacturing a composite steel ingot by surrounding the hollow part of a hollow steel ingot or the outer periphery of a cylindrical steel ingot with a mold and filling the void formed thereby by electroslab remelting. It is described in Japanese Patent Application Laid-Open No. 59-73150. In electroslab remelting, the tip of a consumable electrode is inserted into the slab bath in the cavity, and current is extracted through the slag bath by a current collecting terminal electrically connected to the steel ingot. This is done by passing current between the consumable electrode and the current collection terminal. In other words, the consumable electrode and the wall surface of the cavity in the steel ingot are melted by the heat of the slag bath, and the mixture of the molten metal of the consumable electrode and the molten metal of the steel ingot fills the cavity from bottom to top, and the composite steel A lump is formed.
上記従来の技術では、鋼塊の水平方向の溶け込
み深さが不均一になりやすいという問題点があ
る。つまり、その溶け込みが不均一になる原因の
一つは、溶解電流密度が不均一となるためにスラ
グ溶温度の不均一が生じるためであることがあげ
られる。エレクトロスラグ再溶解においては、鋼
塊の外周または鋼塊を載せる定盤の外周に集電溶
端子を設け、電流が消耗電極材からスラグ浴を介
して集電用端子に流れる電気回路を形成する。電
流は電気回路の最短距離を優先的に流れる性質を
有するので、集電用端子を複数個設けても各端子
に電流が均等に流れるわけではなく、偏流が生じ
て必ず溶解電流密度の不均一が生じる。このよう
に溶解電流密度の不均一が生じると、溶解電流密
度が高い部分近傍のスラグ浴温度が高くなり、鋼
塊の溶け込み深さが大きくなつて、水平方向の溶
け込み深さの不均一を招く。このように溶け込み
深さが不均一になると、成分偏析あるいは組織む
らを生じ、品質上好ましくないという問題点があ
つた。
The conventional technique described above has a problem in that the horizontal penetration depth of the steel ingot tends to be uneven. In other words, one of the causes of non-uniform melting is that the melting current density becomes non-uniform, resulting in non-uniform slag melting temperature. In electroslag remelting, a current collecting welding terminal is provided around the outer periphery of the steel ingot or the outer periphery of the surface plate on which the steel ingot is placed, and an electric circuit is formed in which current flows from the consumable electrode material through the slag bath to the current collecting terminal. . Since current has the property of preferentially flowing through the shortest distance in an electrical circuit, even if multiple current collection terminals are provided, the current will not flow equally to each terminal, and a biased current will always occur, resulting in uneven melting current density. occurs. When the melting current density becomes uneven in this way, the slag bath temperature near the areas where the melting current density is high increases, and the penetration depth of the steel ingot increases, leading to uneven horizontal penetration depth. . When the penetration depth becomes uneven in this way, component segregation or structure unevenness occurs, which is a problem in terms of quality.
本発明は、このような問題点を解決しようとす
るものである。すなわち、本発明は、鋼塊と同心
的に配置された空所をエレクトロスラグ再溶解に
よつて充てんする複合鋼塊の製造方法および装置
において、前記鋼塊の水平方向の溶け込みの均一
性を向上させることができる方法および装置を提
供することを目的とするものである。 The present invention attempts to solve these problems. That is, the present invention improves the uniformity of horizontal penetration of the steel ingot in a method and apparatus for manufacturing a composite steel ingot in which voids arranged concentrically with the steel ingot are filled by electroslag remelting. The object of the present invention is to provide a method and a device that can perform the following steps.
本発明の方法は、エレクトロスラグ再溶解中に
消耗電極から鋼塊に電気的に結合された複数の集
電用端子へ流れる各電流値が同一となるように電
流制御器の点弧位相を制御するようにした。また
本発明の装置は、電源装置から各集電用端子に流
れた溶解電流を検出する電流検出器、基準電流値
を設定する電流設定器、電流の検出値と基準値を
比較演算する比較演算器、そして、演算結果に基
づいて作動する電流制御器とからなるものとし
た。
The method of the present invention controls the ignition phase of the current controller so that the current value flowing from the consumable electrode to the plurality of current collecting terminals electrically connected to the steel ingot during electroslag remelting is the same. I decided to do so. The device of the present invention also includes a current detector that detects the melting current flowing from the power supply device to each current collection terminal, a current setter that sets a reference current value, and a comparison operation that compares and calculates the detected current value and the reference value. and a current controller that operates based on the calculation results.
各集電用端子に流れる溶解電流は、それぞれの
電流検出器によつて検出され、該電流検出器が出
力する検出電流値と、電流設定器に予め溶解条件
に合わせて設定してある基準電流値とを比較演算
器で比較演算し、その偏差がゼロとなるように、
電流制御器の点弧位相を制御する。これにより、
各集電用端子へ流れる電流が同一値になり、鋼塊
の水平方向の溶け込みが均一もしくは均一に近く
なる。
The melting current flowing through each current collection terminal is detected by each current detector, and the detected current value outputted by the current detector and the reference current set in advance in the current setting device according to the melting conditions. Compare the values with the comparison calculator, and so that the deviation is zero,
Controls the firing phase of the current controller. This results in
The current flowing to each current collecting terminal becomes the same value, and the horizontal penetration of the steel ingot becomes uniform or nearly uniform.
第１図は本発明の方法を実施するためのブロツ
ク図である。第１図において、１は電源装置、２
は溶解炉、３は集電用端子、４は電流検出器、５
は基準電流設定器、６は比較演算器、７は電流制
御器である。
FIG. 1 is a block diagram for implementing the method of the present invention. In Figure 1, 1 is a power supply device, 2
is a melting furnace, 3 is a current collecting terminal, 4 is a current detector, 5
6 is a reference current setter, 6 is a comparator, and 7 is a current controller.
第２図は本発明の装置の一実施例を示した正面
断面図である。第２図において、８は移相器、９
はサイリスタ装置、１０は消耗電極、１１は円柱
状鋼塊、１２は水冷鋳型、１３は水冷定盤、１４
はスラグ浴、１５は溶融金属浴、１６は凝固金
属、２１はサイリスタ、２２はダイオードであ
る。 FIG. 2 is a front sectional view showing one embodiment of the device of the present invention. In FIG. 2, 8 is a phase shifter, 9
10 is a thyristor device, 10 is a consumable electrode, 11 is a cylindrical steel ingot, 12 is a water-cooled mold, 13 is a water-cooled surface plate, 14
15 is a slag bath, 15 is a molten metal bath, 16 is a solidified metal, 21 is a thyristor, and 22 is a diode.
すなわち、第２図に示すように、水冷定盤１３
に水冷鋳型１２を載置し、その内部に同心的に円
柱状鋼塊１１を置き、空間に円筒状消耗電極１０
を挿入する。消耗電極１０の形状は棒状でもよ
い。水冷定盤１３の側面に等間隔で集電用端子
３，３，３，…が複数個取り付けられる。集電用
端子３，３，３，…はサイリスタ装置９，９，
９，…を介して電源装置１に接続される。消耗電
極１０はスラグ浴１４のジユール熱によつて溶解
し溶融金属となり、スラグ浴１４の下部に溶融金
属浴１５を形成する。そして、凝固金属１６とな
つて鋼塊外周の空所を充てんしていく。各集電用
端子３，３，３，…に流れた溶解電流は、電流検
出器４，４，４，…によつて検出される。この電
流検出器４，４，４，…が出力する検出電流信号
と、基準電流設定器５に予め溶解条件に合わせて
設定してある電流値とを、比較演算器６，６，
６，…で比較演算し、その偏差がゼロとなるよう
に、移相器８，８，８，…に信号を入力してサイ
リスタ装置９，９，９，…の点弧位相を制御す
る。 That is, as shown in FIG.
A water-cooled mold 12 is placed in the mold, a cylindrical steel ingot 11 is placed concentrically inside the mold, and a cylindrical consumable electrode 10 is placed in the space.
Insert. The consumable electrode 10 may have a rod shape. A plurality of current collecting terminals 3, 3, 3, . . . are attached to the side surface of the water-cooled surface plate 13 at equal intervals. Current collecting terminals 3, 3, 3, ... are thyristor devices 9, 9,
It is connected to the power supply device 1 via 9, . The consumable electrode 10 is melted into molten metal by the Joule heat of the slag bath 14, and a molten metal bath 15 is formed in the lower part of the slag bath 14. Then, it becomes solidified metal 16 and fills the voids around the outer periphery of the steel ingot. The melting current flowing through each current collecting terminal 3, 3, 3, . . . is detected by a current detector 4, 4, 4, . The detected current signals outputted by the current detectors 4, 4, 4, .
6, . . . perform comparison calculations, and input signals to the phase shifters 8, 8, 8, . . . to control the firing phases of the thyristor devices 9, 9, 9, . . . so that the deviation becomes zero.
また第２図の装値によれば、各集電用端子３，
３，３，…に流れる電流を一定にするため、予め
基準電流値を設定した基準電流設定器５の設定電
流値と、電流検出器４，４，４，…の検出電流値
に応じた出力電圧値を比較演算器６，６，６，…
により常時比較しておき、偏差があれば、第１図
にみられる電流制御部７によりサイリスタ装置９
のサイリスタ２１の動作位置相を制御する。 Also, according to the pricing shown in Figure 2, each current collection terminal 3,
In order to keep the current flowing through 3, 3, ... constant, the output is based on the set current value of the reference current setting device 5, which has a reference current value set in advance, and the detected current value of the current detectors 4, 4, 4, ... Voltage value comparison calculator 6, 6, 6,...
If there is a deviation, the current controller 7 shown in FIG.
The operating position and phase of the thyristor 21 are controlled.
第３図は上記制御時の電圧波形の具体例を示し
ている。すなわち、第２図の装置では、一方向の
波形制御になるため、第３図に示すように、負の
移送制御を行ない、斜線部２５の電流印加を減少
させている。 FIG. 3 shows a specific example of the voltage waveform during the above control. That is, in the apparatus shown in FIG. 2, the waveform control is unidirectional, so as shown in FIG. 3, negative transfer control is performed to reduce the current application to the shaded portion 25.
さらに、本発明方法の一実施例について説明す
る。 Furthermore, one embodiment of the method of the present invention will be described.
直径320mm、高さ730mmの水冷鋳型１２の内部
に、直径200mm、高さ1300mmのSCM440鋼からな
る鋼塊１１を水冷定盤１３上に設置し、SKD11
鋼からなる内径235mm、外径280mmの円筒状消耗電
極１０を用い、ふつ化カルシウム40％−酸化カル
シウム30％−アルミナ30％からなるスラグを用い
て、エレクトロスラグ再溶解を行なつた。集電用
端子３は水冷定盤１３の周囲に等間隔で５個設け
た。電圧は30V、電流は5KAとし、基準電流設定
値は1KAとした。 A steel ingot 11 made of SCM440 steel with a diameter of 200 mm and a height of 1300 mm is placed on a water-cooled surface plate 13 inside a water-cooled mold 12 with a diameter of 320 mm and a height of 730 mm.
Using a cylindrical consumable electrode 10 made of steel with an inner diameter of 235 mm and an outer diameter of 280 mm, electroslag remelting was performed using a slag consisting of 40% calcium fluoride, 30% calcium oxide, and 30% alumina. Five current collecting terminals 3 were provided around the water-cooled surface plate 13 at equal intervals. The voltage was 30V, the current was 5KA, and the reference current setting was 1KA.
そして、得られた複合鋼塊の縦断面における母
材の溶け込み深さを測定した。第４図は右側部分
ａおよび左側部分ｂの溶け込み深さを示してい
る。また同一条件で再溶解を行なつた従来の方法
による結果を第５図に示している。この第４図示
す結果を第５図に示す結果と比較すれば、本発明
のこの実施例が、水平方向の溶け込み深さの均一
性にすぐれていることが明らかである。 Then, the penetration depth of the base metal in the longitudinal section of the obtained composite steel ingot was measured. FIG. 4 shows the penetration depth of the right side part a and the left side part b. Further, FIG. 5 shows the results of a conventional method in which redissolution was performed under the same conditions. Comparing the results shown in FIG. 4 with the results shown in FIG. 5, it is clear that this embodiment of the present invention has excellent uniformity of penetration depth in the horizontal direction.
第６図は本発明に使用されるサイリスタ装置９
のもう１つの実施例を示している。この実施例で
は、サイリスタ装置９として、単純なサイリスタ
２１を用いている。取り付け方向は正負方向を考
えて自在に変更ができる。この実施例による制御
時の電圧波形は第７図に示すようになり、制御範
囲としては、０〜50％であり第、３図の場合の50
〜100％に比較して小電流域となるが、ダイオー
ドを節約できる。 FIG. 6 shows a thyristor device 9 used in the present invention.
Another example is shown. In this embodiment, a simple thyristor 21 is used as the thyristor device 9. The mounting direction can be changed freely considering the positive and negative directions. The voltage waveform during control according to this embodiment is as shown in Fig. 7, and the control range is 0 to 50%, which is 50% in the case of Fig. 3.
The current range is smaller than ~100%, but the diode can be saved.
第８図は本発明に使用されるサイリスタ装置９
のさらにもう１つの実施例を示している。この実
施例による制御時の電圧波形は第９図に示すよう
になり、制御範囲としては、０〜100％の広領域
が可能となるが、サイリスタ２１やダイオード２
２が増加する。 FIG. 8 shows a thyristor device 9 used in the present invention.
Yet another example is shown. The voltage waveform during control according to this embodiment is as shown in FIG. 9, and a wide control range from 0 to 100% is possible.
2 increases.
本発明の方法は、エレクトロスラグ再溶解中に
消耗電極から鋼塊に電気的に結合された複数の集
電用端子へ流れる各電流値が同一となるように電
流制御器の点弧位相を制御するようにしたので、
前記実施例でも述べたとおり、鋼塊の水平方向の
溶け込み深さの均一性を高めることができる。
The method of the present invention controls the ignition phase of the current controller so that the current value flowing from the consumable electrode to the plurality of current collecting terminals electrically connected to the steel ingot during electroslag remelting is the same. I decided to do this, so
As described in the embodiment, the uniformity of the horizontal penetration depth of the steel ingot can be improved.
また本発明の装置は、電源装置から各集電用端
子に流れた溶解電流を検出する電流検出器、基準
電流値を設定する電流設定器、電流の検出値と基
準値を比較演算する比較演算器、そして、演算結
果に基づいて作動する電流制御器とからなるの
で、本発明の方法の前記点込位相の制御を確実に
行なわしめることができ、かつ、構造も複雑とな
ることがなく、安価で提供することが可能とな
る。 The device of the present invention also includes a current detector that detects the melting current flowing from the power supply device to each current collection terminal, a current setter that sets a reference current value, and a comparison operation that compares and calculates the detected current value and the reference value. and a current controller that operates based on the calculation result, it is possible to reliably control the injection phase of the method of the present invention, and the structure is not complicated. It becomes possible to provide the product at a low price.
第１図は本発明の方法を実施するためのブロツ
ク図、第２図は本発明の装置の一実施例を示した
正面断面図、第３図は第２図のサイリスタ装置の
制御時の電圧波形を示した説明図、第４図は本発
明の方法の一実施例による鋼塊の溶け込み深さの
説明図、第５図は従来の技術による鋼塊の溶け込
み深さの説明図、第６図は本発明に使用されるサ
イリスタ装置のもう１つの実施例を示した説明
図、第７図は第６図のサイリスタ装置による制御
時の電圧波形の説明図、第８図は本発明に使用さ
れるサイリスタ装置のさらにもう１つの実施例を
示した説明図、第９図は第８図のサイリスタ装置
による制御時の電圧波形の説明図である。
１……電源装置、２……溶解炉、３……集電用
端子、４……電流検出器、５……基準電流設定
器、６……比較演算器、７……電流制御器、８…
…移相器、９……サイリスタ装置、１０……消耗
電極、１１……円柱状鋼塊、１２……水冷鋳型、
１３……水冷定盤、１４……スラグ浴、１５……
溶融金属浴、１６……凝固金属。
Fig. 1 is a block diagram for carrying out the method of the present invention, Fig. 2 is a front sectional view showing an embodiment of the device of the present invention, and Fig. 3 is the voltage during control of the thyristor device of Fig. 2. FIG. 4 is an explanatory diagram showing the penetration depth of a steel ingot according to an embodiment of the method of the present invention. FIG. 5 is an explanatory diagram of the penetration depth of a steel ingot according to the conventional technique. The figure is an explanatory diagram showing another embodiment of the thyristor device used in the present invention, FIG. 7 is an explanatory diagram of the voltage waveform during control by the thyristor device in FIG. 6, and FIG. 8 is an explanatory diagram showing another embodiment of the thyristor device used in the present invention. FIG. 9 is an explanatory diagram showing yet another embodiment of the thyristor device according to the present invention, and FIG. 9 is an explanatory diagram of voltage waveforms during control by the thyristor device of FIG. DESCRIPTION OF SYMBOLS 1... Power supply device, 2... Melting furnace, 3... Current collection terminal, 4... Current detector, 5... Reference current setting device, 6... Comparison calculator, 7... Current controller, 8 …
... Phase shifter, 9 ... Thyristor device, 10 ... Consumable electrode, 11 ... Cylindrical steel ingot, 12 ... Water-cooled mold,
13...Water-cooled surface plate, 14...Slag bath, 15...
Molten metal bath, 16... solidified metal.
Claims (1)
挿入し、定盤上に載置された前記鋼塊に電気的に
結合された複数の集電用端子によつて電流をとり
出しながら通電してスラグ浴の下でエレクトロス
ラブ再溶解し、凝固する複合鋼塊の製造方法にお
いて、前記エレクトロスラグ再溶解中に前記消耗
電極から前記複数の集電用端子へ流れる各電流値
が同一となるように電流制御器の点弧位相を制御
することを特徴とする複合鋼塊の製造方法。 ２ 同心的に形成された空所を有する鋼塊を載せ
る定盤と、前記空所に挿入される消耗電極と、前
記定盤と前記鋼塊の一方の外周に電気的に結合さ
れる複数の集電用端子と、前記消耗電極と前記集
電用端子とに電力を与える電源装置とを有する複
合鋼塊製造装置において、前記集電用端子に流れ
た溶解電流を検出する電流検出器と、この電流検
出器で検出された検出電流値と基準電流設定器で
設定された基準電流値とを比較演算する比較演算
器と、この比較演算器で演算された演算結果に基
づいて作動する電流制御器とを、前記各集電用端
子と前記電源装置との間に備えていることを特徴
とする複合鋼塊の製造装置。[Claims] 1. A consumable electrode is inserted into a cavity arranged concentrically with a steel ingot, and a consumable electrode is inserted into a plurality of current collecting terminals electrically connected to the steel ingot placed on a surface plate. In the method for producing a composite steel ingot, in which the electroslab is remelted under a slag bath and solidified by applying current while drawing a current, from the consumable electrode to the plurality of current collecting terminals during the electroslag remelting. 1. A method for manufacturing a composite steel ingot, comprising controlling the ignition phase of a current controller so that the values of each flowing current are the same. 2. A surface plate on which a steel ingot is placed having a concentrically formed cavity, a consumable electrode inserted into the cavity, and a plurality of consumable electrodes electrically coupled to the outer periphery of one of the surface plate and the steel ingot. In a composite steel ingot manufacturing apparatus having a current collecting terminal and a power supply device that supplies power to the consumable electrode and the current collecting terminal, a current detector that detects a melting current flowing through the current collecting terminal; A comparison calculator that compares and calculates the detected current value detected by this current detector and the reference current value set by the reference current setting device, and a current control that operates based on the calculation result calculated by this comparison calculator. An apparatus for producing a composite steel ingot, characterized in that a device is provided between each of the current collecting terminals and the power supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16233587A JPS6411061A (en) | 1987-07-01 | 1987-07-01 | Method and apparatus for producing complex steel ingot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16233587A JPS6411061A (en) | 1987-07-01 | 1987-07-01 | Method and apparatus for producing complex steel ingot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6411061A JPS6411061A (en) | 1989-01-13 |
| JPH0525590B2 true JPH0525590B2 (en) | 1993-04-13 |
Family
ID=15752593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16233587A Granted JPS6411061A (en) | 1987-07-01 | 1987-07-01 | Method and apparatus for producing complex steel ingot |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6411061A (en) |
-
1987
- 1987-07-01 JP JP16233587A patent/JPS6411061A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6411061A (en) | 1989-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1179023A (en) | Method for welding railroad rails and means therefor | |
| US4277638A (en) | Prefabricated unit for a DC arc furnace | |
| US3670089A (en) | Apparatus for electroslag remelting of metals with molten slag introduction | |
| CN1209941A (en) | Electrode for plasma generator and plasma generato including same, and process for treating solidifying liquid metal | |
| CN108284213A (en) | A kind of On-Line Dynamic Monitoring prevents the hollow electroslag remelting interior crystallizer braking system of stripping formula and its method of adjustment | |
| JPH0525590B2 (en) | ||
| US3571475A (en) | Electroslag refining apparatus | |
| US4696014A (en) | Self-baking electrodes | |
| JPS6154097B2 (en) | ||
| US3586749A (en) | Method for the electroslag welding and building up of metals and alloys | |
| JPS6364486B2 (en) | ||
| CN217499371U (en) | Baking device of consumable electrode | |
| JP6565516B2 (en) | Casting equipment | |
| SE430573B (en) | DEVICE FOR SUPPLYING MOLD STEEL TO A GOOD UNDER POSITION | |
| JPS5921253B2 (en) | Manufacturing method of steel ingots | |
| JP6528992B2 (en) | Casting equipment | |
| JP2004522852A (en) | Method for producing metal ingot or billet by melting electrodes in conductive slag bath and apparatus for performing the same | |
| US3565994A (en) | Electrode slag melting method | |
| JPH0452067A (en) | Production of cast ingot | |
| US3736359A (en) | Electric furnace | |
| WO1995016336A1 (en) | Process and device for regulating the position of the tip of an electric furnace electrode | |
| RU2736949C2 (en) | Method of ingot forming in crystallizers of special-metallurgical furnaces | |
| US3652773A (en) | Process of electrically remelting high-melting metals | |
| SU1136002A1 (en) | Method of controlling furnace for remelting consumable electrodes at beginning of heat | |
| SU851798A1 (en) | Method of control of electric arc furnace electric mode |