Patent US4584015A successfully refreshed from Google Patents.
US4584015A
Expired / Lapsed
US
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Process and system for the production of very pure alloys
Assignee: Fried Krupp AG
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Filing: 1984-09-25
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Granted: 1986-04-22
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Expires: 2004-09-25
Abstract
Abstract Process and system for the production of very pure alloys. The starting materials are first melted and vacuum treated in an induction crucible inside a vacuum melt system, and then are poured into a second melt crucible, and there brought to casting temperature and held there. An opening beneath the melt in the second melt crucible is used for pouring out the melt. The system for carrying out the process comprises a vacuum melt crucible assembly containing an induction melt crucible and a second melt crucible. The second melt crucible has an orifice in its lower area which is operated by a sealing arrangement. A chamber is arranged underneath the second melt crucible.
Inventors
- 👤 Jurgen Hartwig
- 👤 Johannes Jachowski
- 👤 Paul Pant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:41
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/15
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
157 words
Process for the production of an alloy, by which a starting material is treated in a vacuummelting assembly and subsequently cast comprising the steps of: (a) melting the alloy in an induction crucible and vacuum treating the melt in the induction crucible during induction heating, (b) pouring the resulting melt into a second melt crucible contained in the melt assembly, (c) subjecting the melt, which is in the form of a liquid bath, to a refining treatment in the second melt crucible, during which the entire melt is brought to a casting temperature and the bath in the second melt crucible is maintained without movement until impurities have risen, (d) pouring the melt, at a constant temperature, out of an orifice which is under the surface of the bath, and (e) terminating the pouring from the second melt crucible, before the impurities which have risen to the surface of the bath can flow out with the bath.
Claim 2
Dependent Claim
157 words
Process for the production of an alloy, by which a starting material is treated in a vacuummelting assembly and subsequently cast comprising the steps of: (a) melting the alloy in an induction crucible and vacuum treating the melt in the induction crucible during induction heating, (b) pouring the resulting melt into a second melt crucible contained in the melt assembly, (c) subjecting the melt, which is in the form of a liquid bath, to a refining treatment in the second melt crucible, during which the entire melt is brought to a casting temperature and the bath in the second melt crucible is maintained without movement until impurities have risen, (d) pouring the melt, at a constant temperature, out of an orifice which is under the surface of the bath, and (e) terminating the pouring from the second melt crucible, before the impurities which have risen to the surface of the bath can flow out with the bath.
Claim 3
Dependent Claim
29 words
Process according to claim 1, wherein inert gas is fed to the melt in the lower area of the second melt crucible in order to assist the refining treatment.
Claim 4
Dependent Claim
97 words
System for producing an alloy, by which a starting material is treated in a vacuum melting assembly and subsequently cast, comprising: (a) an induction melt crucible contained in a vacuum melt assembly, (b) a second, stationary melt crucible mounted in the melt assembly and having a cavity for receiving alloy from the induction melt crucible, (c) a discharge orifice disposed in the lower area of the second melt crucible, (d) sealing arrangement to seal the orifice, and (e) a chamber beneath the second melt crucible for solidifying liquid alloy which is discharged from the second melt crucible.
Claim 5
Dependent Claim
97 words
System for producing an alloy, by which a starting material is treated in a vacuum melting assembly and subsequently cast, comprising: (a) an induction melt crucible contained in a vacuum melt assembly, (b) a second, stationary melt crucible mounted in the melt assembly and having a cavity for receiving alloy from the induction melt crucible, (c) a discharge orifice disposed in the lower area of the second melt crucible, (d) sealing arrangement to seal the orifice, and (e) a chamber beneath the second melt crucible for solidifying liquid alloy which is discharged from the second melt crucible.
Claim 6
Dependent Claim
17 words
System according to claim 3, wherein the second melt crucible is formed as a resistance-heated melt furnace.
Claim 7
Dependent Claim
16 words
System according to claim 3, wherein the second melt crucible is heated inductively via a susceptor.
Claim 8
Dependent Claim
15 words
System according to claim 3, wherein the second melt crucible is operated by high frequency.
Claim 9
Dependent Claim
24 words
System according to claim 3, wherein nozzles are provided in the lower area of the second melt crucible for the supply of inert gas.
Claim 10
Dependent Claim
19 words
System according to claim 3, wherein the sealing arrangement comprises a metallic stopper rod having a temperature resistant coat.
Claim 11
Dependent Claim
24 words
System according to claim 8, wherein the lower part of the stopper rod is provided with at least one opening to conduct inert gas.
Claim 12
Dependent Claim
35 words
System according to claim 9, wherein the at least one opening in the lower part of the stopper rod comprises at least two laterally arranged openings pointing into the cavity of the second melt crucible.
Claim 13
Dependent Claim
34 words
System according to claim 10, wherein the at least one opening in the lower part of the stopper rod further comprises an outlet opening pointing into the discharge orifice of the second melt crucible.
Claim 14
Dependent Claim
33 words
System according to claim 9, wherein the at least one opening in the lower part of the stopper rod comprises an outlet opening pointing into the discharge orifice of the second melt crucible.
Claim 15
Dependent Claim
14 words
System according to claim 8, wherein the sealing arrangement is cooled by a coolant.
Claim 16
Dependent Claim
77 words
System for producing an alloy, by which a starting material is treated in a vacuum melting assembly and subsequently cast, comprising: (a) an induction melt crucible contained in a vacuum melt assembly, (b) a second, stationary melt crucible mounted in the melt assembly and having a cavity for receiving alloy from the induction melt crucible, (c) a discharge orifice disposed in the lower area of the second melt crucible, and (d) sealing arrangement to seal the orifice.
Claim 17
Dependent Claim
77 words
System for producing an alloy, by which a starting material is treated in a vacuum melting assembly and subsequently cast, comprising: (a) an induction melt crucible contained in a vacuum melt assembly, (b) a second, stationary melt crucible mounted in the melt assembly and having a cavity for receiving alloy from the induction melt crucible, (c) a discharge orifice disposed in the lower area of the second melt crucible, and (d) sealing arrangement to seal the orifice.
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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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |