US3867130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for electroslag remelting of consumable electrodes
Assignee: Individual
•
Filing: 1972-02-17
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Granted: 1975-02-18
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Expires: 1992-02-17
Abstract
Abstract 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 Gabuev
- 👤 Dmitry Fedorovich Gladky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:08
CPC Classifications
B; B22; B22D; B22D23/00; B22D23/06; B22D23/10; C; C22; C22B; C22B9/00; C22B9/16; C22B9/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
A METHOD OF ELECTROSLAG REMELTING OF A CONSUMABLE ELECTRODE COMPRISING PREPARING A BATH OF MOLTEN SLAG IN A MOLD, IMMERISING SAID CONSUMABLE ELECTRODE IN SAID BATH OF MOLTEN SLAG, PASSING ALTERNATING CURRENT THROUGH SAID ELECTRODE TO MELT AND FORM A LIQUID METAL BATH IN SAID MOLD, AND MODULATING THE AMPLITUDE OF SAID A ALTERNATING CURRENT AT A PREDETERMINED FREQUENCY SUBSTANTIALLY BELOW THE FREQUENCY OF SAID ALTERNATING CURRENT.
Claim 2
Independent Claim
67 words
A METHOD OF ELECTROSLAG REMELTING OF A CONSUMABLE ELECTRODE COMPRISING PREPARING A BATH OF MOLTEN SLAG IN A MOLD, IMMERISING SAID CONSUMABLE ELECTRODE IN SAID BATH OF MOLTEN SLAG, PASSING ALTERNATING CURRENT THROUGH SAID ELECTRODE TO MELT AND FORM A LIQUID METAL BATH IN SAID MOLD, AND MODULATING THE AMPLITUDE OF SAID A ALTERNATING CURRENT AT A PREDETERMINED FREQUENCY SUBSTANTIALLY BELOW THE FREQUENCY OF SAID ALTERNATING CURRENT.
Claim 3
Dependent Claim
36 words
A method of electroslag remelting of a consumable electrode as recited in claim 1 wherein said predetermined frequency of modulation of said alternating current is near the natural frequency of oscillation of said liquid metal bath.
Claim 4
Independent Claim
78 words
A method of electroslag remelting of a consumable electrode comprising preparing a bath of molten slag in a mold, immersing said consumable electrode in said bath of molten slag, passing electrical current through said electrode into said bath of molten slag, thereby causing said electrode to melt and form a liquid metal bath in said mold, and varying the amplitude of said electrical current at a frequency near the natural frequency of oscillation of said liquid metal bath.
Claim 5
Independent Claim
78 words
A method of electroslag remelting of a consumable electrode comprising preparing a bath of molten slag in a mold, immersing said consumable electrode in said bath of molten slag, passing electrical current through said electrode into said bath of molten slag, thereby causing said electrode to melt and form a liquid metal bath in said mold, and varying the amplitude of said electrical current at a frequency near the natural frequency of oscillation of said liquid metal bath.
Claim 6
Dependent Claim
35 words
A method of electroslag remelting as defined by claim 1, wherein said passing step is carried out with a transformer having primary and secondary circuits, and said modulating step carried out in the secondary circuit.
Claim 7
Dependent Claim
36 words
A method of electroslag remelting as defined by claim 1, wherein said passing step is conducted with a transformer having primary and secondary circuits, and wherein said modulating step is carried out in the primary circuit.
Claim 8
Dependent Claim
42 words
The method of electroslag remelting as defined by claim 1, wherein the depth of modulation occurring in said modulating step is one hundred percent whereby the alternating current is applied to the molten slag in the form of on-off alternating current impulses.
Claim 9
Dependent Claim
30 words
A method of electroslag remelting as defined by claim 1, wherein said modulating step varies the amplitude of the alternating current between predetermined high and low values greater than zero.
Claim 10
Dependent Claim
32 words
The method of electroslag remelting as defined by claim 1, wherein said modulating step is conducted in a manner to minimize formation of stringers and dendritic non-uniformity in the metal ingot formed.
References Cited (Backward Citations)
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |