US3693700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Installation for the electroslag remelting of consumable electrodes with modulated current
Assignee: Individual
•
Filing: 1970-07-06
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Granted: 1972-09-26
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Expires: 1990-07-06
Abstract
Abstract A device for improving the quality of the metal of ingots, produced by the method of electroslag remelting of consumable electrodes in cooled moulds, the amplitude of the alternating current of low frequency of the installation being modulated by means of various modulators series-connected in the primary or secondary circuit of a transformer feeding the electroslag remelting installation. The modulation of the amplitude of the alternating current of a frequency equal or close to the frequency of the oscillations of the liquid metal bath causes resonance oscillations of the metal bath, which cause refining of the structure of the crystallizing ingot, elimination of dendritic non-uniformity and a higher quality of the metal.
Inventors
- 👤 Boris Evgenievich Paton
- 👤 Vladimir Konstantinovi Lebedev
- 👤 Boris Izrailevich Medovar
- 👤 Jury Vadimovich Latash
- 👤 Nikolai Vasilievich Podola
- 👤 Oleg Petrovich Bondarenko
- 👤 Semen Abramovich Leibenzon
- 👤 Gary Petrovich Kaganovsky
- 👤 Vadim Filimonovich Smolyakov
- 👤 Konstantin Sergeevich Eltsov
- 👤 Georgy Kharitonovich Gabuer
- 👤 Dmitry Fedorovich Gladky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:35
CPC Classifications
B; B22; B22D; B22D23/00; B22D23/06; B22D23/10
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
81 words
An electroslag remelting installation comprising a mold for receiving a bath of molten slag, means for positioning a consumable electrode in said mold for immersion in said bath of molten slag, alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold, and means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current.
Claim 2
Dependent Claim
81 words
An electroslag remelting installation comprising a mold for receiving a bath of molten slag, means for positioning a consumable electrode in said mold for immersion in said bath of molten slag, alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold, and means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current.
Claim 3
Dependent Claim
41 words
An electroslag remelting installation as recited in claim 1 wherein said alternating current supply means comprises a transformer having primary and secondary circuits, the means for modulating the amplitude of alternating current being connected in the primary circuit of said transformer.
Claim 4
Dependent Claim
41 words
An electroslag remelting installation as recited in claim 1 wherein said alternating current supply means comprises a transformer having primary and secondary circuits, the means for modulating the amplitude of alternating current being connected in the secondary circuit of the transformer.
Claim 5
Dependent Claim
24 words
An electroslag remelting installation as recited in claim 1 wherein said means for modulating the amplitude of the alternating current is an ignitron interrupter.
Claim 6
Dependent Claim
113 words
An electroslag remelting installation comprising: a mold for receiving a bath of molten slag; means for positioning a consumable electrode in said mold for immersion in said bath of molten slag; alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold; and means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current, said means for modulating the amplitude of said alternating current comprising a saturation choke with an interrupter of its control current for varying the inductance of the working windings of said choke.
Claim 7
Dependent Claim
113 words
An electroslag remelting installation comprising: a mold for receiving a bath of molten slag; means for positioning a consumable electrode in said mold for immersion in said bath of molten slag; alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold; and means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current, said means for modulating the amplitude of said alternating current comprising a saturation choke with an interrupter of its control current for varying the inductance of the working windings of said choke.
Claim 8
Dependent Claim
135 words
An electroslag remelting installation comprising: a mold for receiving a bath of molten slag; means for positioning a consumable electrode in said mold for immersion in said bath of molten slag; alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold; means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current; said alternating current supply means comprising a transformer having primary and secondary circuits; and said means for modulating the amplitude of said alternating current being connected in the secondary circuit of the transformer and comprising a choke with a movable yoke to vary the inductance of the secondary circuit of said alternating current supply means.
Claim 9
Dependent Claim
135 words
An electroslag remelting installation comprising: a mold for receiving a bath of molten slag; means for positioning a consumable electrode in said mold for immersion in said bath of molten slag; alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold; means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current; said alternating current supply means comprising a transformer having primary and secondary circuits; and said means for modulating the amplitude of said alternating current being connected in the secondary circuit of the transformer and comprising a choke with a movable yoke to vary the inductance of the secondary circuit of said alternating current supply means.
Claim 10
Dependent Claim
39 words
An electroslag remelting installation as recited in claim 1 wherein the depth of modulation of said alternating current is 100 percent whereby said alternating current is applied to said Molten slag in the form of on-off alternating current impulses.
Claim 11
Dependent Claim
33 words
An electroslag remelting installation as recited in claim 1 wherein said means for modulating said alternating current varies the amplitude of said alternating current between predetermined high and low values greater than 0.
Claim 12
Dependent Claim
35 words
An electroslag remelting installation as recited in claim 1 wherein the frequency at which said alternating current is modulated is near the natural frequency of oscillation of said liquid metal bath formed in said mold.
Claim 13
Dependent Claim
17 words
An electroslag remelting installation as recited in claim 9 wherein said alternating current supply is a transformer.
Claim 14
Dependent Claim
32 words
An electroslag remelting installation as recited in claim 10 wherein said means for modulating the amplitude of said alternating current is connected into the primary or secondary winding circuits of said transformer.
Claim 15
Dependent Claim
183 words
An electroslag remelting installation comprising: a mold for receiving a bath of molten slag; means for positioning a consumable electrode in said mold for immersion in said bath of molten slag; alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold; means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current and near the natural frequency of oscillation of said liquid metal bath formed in said mold; said alternating current supply means being a transformer having primary and secondary winding circuits; and said means for modulating the amplitude of said alternating current being a saturation choke, the working windings of said choke being connected into the secondary winding circuit of said transformer and the control winding of said choke connected to an autotransformer through a rectifier and a set of contacts, and wherein the amplitude of said alternating current is modulated by controlling the current in said control windings by means of said autotransformer.
Claim 16
Dependent Claim
183 words
An electroslag remelting installation comprising: a mold for receiving a bath of molten slag; means for positioning a consumable electrode in said mold for immersion in said bath of molten slag; alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold; means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current and near the natural frequency of oscillation of said liquid metal bath formed in said mold; said alternating current supply means being a transformer having primary and secondary winding circuits; and said means for modulating the amplitude of said alternating current being a saturation choke, the working windings of said choke being connected into the secondary winding circuit of said transformer and the control winding of said choke connected to an autotransformer through a rectifier and a set of contacts, and wherein the amplitude of said alternating current is modulated by controlling the current in said control windings by means of said autotransformer.
Claim 17
Dependent Claim
24 words
An electroslag remelting installation as recited in claim 9 wherein said means for modulating the amplitude of said alternating current is an ignitron interrupter.
Claim 18
Dependent Claim
106 words
An electroslag remelting installation comprising a mold for receiving a bath of molten slag, means for positioning a consumable electrode in said mold for immersion in said bath of molten slag, alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold, and means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current, the operation of said installation resulting in the remelting of said electrode with minimum formation of strings and dendritic nonuniformity in the metal ingot formed.
Claim 19
Dependent Claim
106 words
An electroslag remelting installation comprising a mold for receiving a bath of molten slag, means for positioning a consumable electrode in said mold for immersion in said bath of molten slag, alternating current supply means for passing alternating current through said electrode into said bath of molten slag, whereby a liquid metal bath is formed in said mold, and means, for modulating the amplitude of said alternating current, operating at a predetermined frequency below the supplied frequency of said alternating current, the operation of said installation resulting in the remelting of said electrode with minimum formation of strings and dendritic nonuniformity in the metal ingot formed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |