US3823242A - Electroslag remelting process - Google Patents

Electroslag remelting process Download PDF

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Publication number
US3823242A
US3823242A US00354436A US35443673A US3823242A US 3823242 A US3823242 A US 3823242A US 00354436 A US00354436 A US 00354436A US 35443673 A US35443673 A US 35443673A US 3823242 A US3823242 A US 3823242A
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United States
Prior art keywords
electrodes
mould
row
stationary
power source
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Expired - Lifetime
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US00354436A
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English (en)
Inventor
V Andreev
G Boiko
B Paton
B Medovar
V Chernykh
A Shavrin
E Dolbenko
J Emelyanenko
J Sobolev
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Individual
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Individual
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/16—Remelting metals
    • C22B9/18—Electroslag remelting

Definitions

  • the electrodes are art ranged in the mould space in parallel rows alternating [22] Filed 1973 [in such a manner that one row is composed of the [21] Appl. No: 354,436 electrodes coupled to one leadout of the power source and the other of those coupled to another leadout [30] Foreign Application Priority Data ihereof' Apr. 29, 1972 U.S.S.R 1778702 5 Claims, 3 Drawing Figures BACKGROUND OF-THE INVENTION
  • the present invention relates to electrometallurgy and more particularly to electroslag remelting processes.
  • the invention is useful for the production of rectangular ingots to be rolled into sheets 200 300 mm thick and for the manufacture of cast blanks having an intricate shape.
  • An electroslag remelting process carried out by feeding fused consumable electrodes into a cooled metallic mould is known in the art.
  • each of the groups being made up of one movable electrode and one stationary electrode with respect to the mould, the electrodes being connected to a power source according to a bifilar circuit.
  • the known process enables ingot slabs featuring a large width-to-thickness ratio to be manufactured.
  • a disadvantage of the known process resides in the possibility of contact between the edges of the movably mounted electrodes and mould walls which may lead to the walls being burnt through. Moreover, the uses of this process are limited, insofar as the fabrication of a large ingot with a large cross-section and a thicknessto-width ratio close to l is impractical.
  • the electrodes be arranged in the mould in two rows, the electrodes of one row being connected to one leadout of the transformer winding and those in the other row to another leadout.
  • the extreme electrodes in a row be mounted in the mould stationary in relation thereto. Since all the electrodes in this row are under the same electric potential and since stationary electrodes which are reliably insulated and secured are arranged between the mould interior and the movable electrodes, melting can be carried out without the movable and stationary electrodes contacting each other and, the possibility of their touching the mould surface also being precluded.
  • One of the features of the present invention provides that the movably mounted electrodes have smaller cross-sections than the stationary ones.
  • the movable electrodes face the stationary ones with their widest sides and the mould wall with their narrowest sides, the surfaces of possible contact between the movable electrodes and the mould wall are minimized, and the most reliable electroslag remelting is ensured.
  • FIG. 1 is a side view of one of possible arrangements of the groups of consumable electrodes in the mould during remelting;
  • FIG. 3 is a top view of one of the electrode arrangements in the cooled mould of circular section.
  • the electrodes 3 and 4 are arranged in the mould 1 in parallel rows a" (FIG. 2) and b in relation to its horizontal planeso that the total cross-sections of the electrodes 3 and 4 are equal to each other in cthe rows ialfi 56b1 Additionally, the total cross-sections of the movable electrodes 4 are also equal to one another in each row a and b. Then the electrodes 3 and 4 in one row a are connected to one winding leadout 5 of a transformer 6, the electrodes 3 and 4 in another row b being connected to another winding lead out 7 of the transformer 6 in such a manner that the rows a and b of the electrodes 3 and 4 are at alternating potential. Next the requisite amount of molten slag is poured into the mould 1 to form a slag bath 8 (FIG. 1) and the electroslag process is initiated.
  • a slag bath 8 FIG. 1
  • the movable electrodes 4 are gradually lowered into the slag bath 8 to produce the formation of a metal bath 9.
  • the electrodes are so mounted in the rows a and b" that the stationary electrodes 3 are located on both sides of each movable electrode 4. Since each row of electrodes is coupled to one leadout of the transformer winding, all the electrodes in this row are at the same potential. Hence, melting can becarried out without the movable and stationary electrodes contacting each other, and the possibility of the electrodes touching the mould wallsbeing also precluded, insofar as the spacing between the internal surface of the mould and the movable electrodes is filled with the stationary electrodes reliably insulated and secured. The latter fact enables the use of small clearances (10-15 mm) between the electrodes and internal mould wall which in turn ensures high mould filling factor.
  • the proposed electroslag remelting process enables the production of ingots with a large cross-section and weight exceeding that of the movable electrodes by several times (3-4) (the weight of the movable electrodes being limited by the rated capacity of the casting machine) which is attained by using the stationary electrodes with a cross-section exceeding that of the movable electrodes by several times (8-15).
  • the process of the present invention has the following advantages.
  • the movable electrodes can be introduced into the slag bath either with the help of a single electrode holder or with two holders.
  • the movable electrodes can be replaced alternately during the melting operation, this being yet another factor contributing to the production of heavy ingots on low-capacity machines.
  • initial adjustable melting variables include voltage across all the electrodes and current magnitude in the stationary electrodes which is regulated by changing'the feed rate of the movable electrodes. All the electrodes may have either similar or different chemical composition. In the second case the ingots with a lower dopant content may be produced, this being very important in the manufacture of alloys needed for producing the consumable electrodes, since their fabrication from the above alloys by the known methods presents a problem.
  • FIG. 2 is a diagrammatic representation of the mould 1 having rectangular cross-section, this mould accommodating two parallel rows a and b" of electrodes 3 and 4 also having a rectangular section.
  • the elec trodes 3 and 4 arranged in one row are connected to one leadout 5 of the winding of the transformer 6, whereas the electrodes 3 and 4 arranged in the other row b" are coupled to another winding leadout 7 of the transformer 6.
  • the rectangular electrodes 4 which are mounted movably have their widest sides facing the electrodes 3 which are mounted stationary.
  • FIG. 3 is a diagrammatic representation of the mould 1 having a circular cross-section, this mould accommodating two parallel rows a" and b" of electrodes 3 and 4 respectively. Each row is composed of three electrodes, the middle one being mounted so as to move vertically with respect to the mould, while the two others are securely fixed in relation to the mould.
  • the electrodes 3 and 4 arranged in the row a" are coupled to one winding leadout 5 of the transformer 6, the electrodes 3, 4 arranged in the row b being connected to the winding leadout 7 of the transformer 6.
  • An electroslag remelting process employing fused consumable electrodes comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US00354436A 1972-04-29 1973-04-25 Electroslag remelting process Expired - Lifetime US3823242A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1778702 1972-04-29

Publications (1)

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US3823242A true US3823242A (en) 1974-07-09

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US00354436A Expired - Lifetime US3823242A (en) 1972-04-29 1973-04-25 Electroslag remelting process

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US (1) US3823242A (sv)
AT (1) AT333996B (sv)
BE (1) BE798857A (sv)
CA (1) CA990079A (sv)
ES (1) ES414200A1 (sv)
FR (1) FR2183043B1 (sv)
GB (1) GB1391385A (sv)
SE (1) SE419772B (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030091696A1 (en) * 2001-10-17 2003-05-15 Panesar Satwinder Singh Soluble particles with encapsulated aroma and method of preparation thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1448656A (fr) * 1965-10-01 1966-08-05 Inst Elektroswarki Patona Installation pour l'électrofusion scorifiante de métaux
FR2108777A1 (en) * 1970-10-02 1972-05-26 Inst Elektroswarki Patona Producing slabs by melting slag by consum- - able electrodes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030091696A1 (en) * 2001-10-17 2003-05-15 Panesar Satwinder Singh Soluble particles with encapsulated aroma and method of preparation thereof
US6793949B2 (en) 2001-10-17 2004-09-21 Kraft Foods Holdings, Inc. Soluble particles with encapsulated aroma and method of preparation thereof

Also Published As

Publication number Publication date
DE2321446B2 (de) 1976-05-20
GB1391385A (en) 1975-04-23
AT333996B (de) 1976-12-27
BE798857A (fr) 1973-10-29
ATA366473A (de) 1976-04-15
FR2183043B1 (sv) 1977-11-04
SE419772B (sv) 1981-08-24
ES414200A1 (es) 1976-01-16
FR2183043A1 (sv) 1973-12-14
CA990079A (en) 1976-06-01
DE2321446A1 (de) 1973-10-31

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