EP0064507A1 - Procede et installation de fusion-coulee pour metaux et alliages a haut point de fusion et forts reactifs - Google Patents
Procede et installation de fusion-coulee pour metaux et alliages a haut point de fusion et forts reactifsInfo
- Publication number
- EP0064507A1 EP0064507A1 EP81902808A EP81902808A EP0064507A1 EP 0064507 A1 EP0064507 A1 EP 0064507A1 EP 81902808 A EP81902808 A EP 81902808A EP 81902808 A EP81902808 A EP 81902808A EP 0064507 A1 EP0064507 A1 EP 0064507A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casting
- melting
- installation
- enclosure
- alloys
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/02—Casting exceedingly oxidisable non-ferrous metals, e.g. in inert atmosphere
- B22D21/022—Casting heavy metals, with exceedingly high melting points, i.e. more than 1600 degrees C, e.g. W 3380 degrees C, Ta 3000 degrees C, Mo 2620 degrees C, Zr 1860 degrees C, Cr 1765 degrees C, V 1715 degrees C
Definitions
- the invention relates to a process and an installation for melting and casting for metals and alloys with a high melting point and strong reactants.
- the vacuum-consumable electrode arc furnace has a number of disadvantages for the melting and casting of metals and alloys with a high melting point and highly reactive, and in particular:
- the electronic gun oven also has certain disadvantages, namely: - request separate chambers for the production of the electron beam and for the melting-casting process - request two complex vacuum installations (10 -5 torr) corresponding to the two rooms. -difficult operation and maintenance of the electromagnetic calibration of the electron beam. -big small evaporation due to high vacuum.
- SUMMARY OF THE INVENTION The process which is the subject of this invention eliminates the above-mentioned disadvantages because the plasma electron gun can easily produce very high temperatures with uniform spatial distribution necessary for the melting of alloys with a high melting point, thus allowing fusion. significant quantity of alloy, the avoidance of strong evapora ⁇ tions of alloying elements being possible thanks to. working pressure high enough.
- the installation to which the present invention relates eliminates the above drawbacks by the fact that both the electron beam and the fusion-casting process are carried out in the same enclosure, at a pressure of the order of 10 -2 torr, the focusing of the beam. obtainable through a suitable cathode configuration which also provides compensation for heat losses in the main zone of the crucible, which subsequently leads to a weak temperature gradient on the surface of the liquid bath, which gives the metal superior casting properties.
- the process which is the subject of this invention has the following advantages: ensures the production of temperatures, whatever high they are, necessary for the melting of metals and alloys at high melting point, ensures volumetric fusion while avoiding overheating of the surface layers, thanks to the pressure of work of lo-1 - lo-2 tractées.
- the installation produced according to the invention has the following advantages: does not require separate enclosures for the production of the electron beam and for the casting fusion process, does not require complex vacuum equipment since it can operate at pressures of 10 -1
- the melting installation for metals and alloys with a high melting point and strong reagents (fig. 1) consists of an enclosure emptied up to pressures of 10 -1 - 10 -2 torr comprising a source of plasma electrons (1.0), a tilting crucible (2.0) with a graphite radial screen (2.1) and a ceramic axial screen (2.2), a lock for the casting molds (3.0) closed by a sliding valve e (3.1), of a pouring cup located at the upper part (Ao) of a centrifuge device (5.0) constituting at the same time the lower closure of the lock (3.0) of a supply device materials (6.0) and a material lock (7.o) with pneumatic control.
- the fusion process begins with the activation of the electronic plasma gun.
- the mold (5.2), prepared separately for casting and mounted on the plate of the centrifuge device (5.o) is lifted with the help of pneumatic motor (5.3. ) in the lock (3.0), the emptying of which begins, the pneumatic motor withdraws the valve plug (3.1) and the hopper (4.0) actuated by the motor (4.1 descends to the casting mold (5.2) this marking sequence the end of the preparation of the casting.
- the casting begins with the start of 1 a centrifugal (5.0) (700 rot / min) by electrical control, after which the electronic source is stopped, the crucible tilted and brought back to its position for receiving the materials, a new cycle is recommended. encant.
- the flow rate can be surmounted by another plasma electron source, with an appropriate configuration and with a lower power than that of the main source.
- the replacement of the casting molds begins with the stop of the centrifuge and continues with the rise of the hopper (4.0) actuated by the motor spring (4.1), the closing of the valve flap (3.1) the leveling of the pressure of the lock (3.1) with the ambient pressure by supplying the lock with argon, lowering the centrifuge (5.0) with the mold (5-2) and dismantling the mold cast on the platform form, the mechanisms being thus prepared to receive a new mold.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RO80102590A RO76187A2 (fr) | 1980-11-14 | 1980-11-14 | Procede et installation pour la fusion et la coulee des metaux a haute temperature de fusion |
RO102590 | 1980-11-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0064507A1 true EP0064507A1 (fr) | 1982-11-17 |
Family
ID=20109165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81902808A Ceased EP0064507A1 (fr) | 1980-11-14 | 1981-10-09 | Procede et installation de fusion-coulee pour metaux et alliages a haut point de fusion et forts reactifs |
Country Status (4)
Country | Link |
---|---|
US (1) | US4482376A (fr) |
EP (1) | EP0064507A1 (fr) |
RO (1) | RO76187A2 (fr) |
WO (1) | WO1982001677A1 (fr) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2170742B (en) * | 1985-01-31 | 1988-04-07 | Maio Spa Mario Di | Apparatus for use in producing castings by the }lost-wax} method |
US4849013A (en) * | 1986-06-05 | 1989-07-18 | Westinghouse Electric Corp. | Combined electron beam and vacuum arc melting for barrier tube shell material |
DE3712281A1 (de) * | 1987-04-10 | 1988-10-27 | Heraeus Gmbh W C | Verfahren zur herstellung von hochduktilem tantal-halbzeug |
US4816214A (en) * | 1987-10-22 | 1989-03-28 | Westinghouse Electric Corp. | Ultra slow EB melting to reduce reactor cladding |
US4814136A (en) * | 1987-10-28 | 1989-03-21 | Westinghouse Electric Corp. | Process for the control of liner impurities and light water reactor cladding |
US5085830A (en) * | 1989-03-24 | 1992-02-04 | Comalco Aluminum Limited | Process for making aluminum-lithium alloys of high toughness |
US5222547A (en) * | 1990-07-19 | 1993-06-29 | Axel Johnson Metals, Inc. | Intermediate pressure electron beam furnace |
US5100463A (en) * | 1990-07-19 | 1992-03-31 | Axel Johnson Metals, Inc. | Method of operating an electron beam furnace |
US5503655A (en) * | 1994-02-23 | 1996-04-02 | Orbit Technologies, Inc. | Low cost titanium production |
US6659165B1 (en) * | 2000-01-07 | 2003-12-09 | Nissin Dental Products, Inc. | Metal casting device and metal casting method using the same |
US6496529B1 (en) | 2000-11-15 | 2002-12-17 | Ati Properties, Inc. | Refining and casting apparatus and method |
US8891583B2 (en) | 2000-11-15 | 2014-11-18 | Ati Properties, Inc. | Refining and casting apparatus and method |
US7578960B2 (en) | 2005-09-22 | 2009-08-25 | Ati Properties, Inc. | Apparatus and method for clean, rapidly solidified alloys |
US7803211B2 (en) | 2005-09-22 | 2010-09-28 | Ati Properties, Inc. | Method and apparatus for producing large diameter superalloy ingots |
US7803212B2 (en) | 2005-09-22 | 2010-09-28 | Ati Properties, Inc. | Apparatus and method for clean, rapidly solidified alloys |
US8748773B2 (en) | 2007-03-30 | 2014-06-10 | Ati Properties, Inc. | Ion plasma electron emitters for a melting furnace |
EP2137329B1 (fr) * | 2007-03-30 | 2016-09-28 | ATI Properties LLC | Four de fusion comprenant un émetteur d'électrons de plasma ionique à décharge à fil |
US7798199B2 (en) * | 2007-12-04 | 2010-09-21 | Ati Properties, Inc. | Casting apparatus and method |
US8747956B2 (en) | 2011-08-11 | 2014-06-10 | Ati Properties, Inc. | Processes, systems, and apparatus for forming products from atomized metals and alloys |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3005859A (en) * | 1958-04-24 | 1961-10-24 | Nat Res Corp | Production of metals |
US3157922A (en) * | 1960-06-25 | 1964-11-24 | Heraeus Gmbh W C | Method and apparatus for producing castings of metals having high melting points |
US3234606A (en) * | 1962-09-06 | 1966-02-15 | Temescal Metallurgical Corp | Apparatus for melting and casting |
DE1291760B (de) * | 1963-11-08 | 1969-04-03 | Suedwestfalen Ag Stahlwerke | Verfahren und Vorrichtung zum diskontinuierlichen und kontinuierlichen Vakuum-Schmelzen und -Giessen von Staehlen und stahlaehnlichen Legierungen (Superiegierungen) |
CA847777A (en) * | 1967-07-12 | 1970-07-28 | Grigorievich Voskoboinikov Viktor | Method of casting metals and alloys in a mold, and a device for effecting same |
GB1219099A (en) * | 1967-12-20 | 1971-01-13 | Adam Dunlop | Production of cast ingots |
US3658119A (en) * | 1968-04-03 | 1972-04-25 | Airco Inc | Apparatus for processing molten metal in a vacuum |
US3736124A (en) * | 1970-09-01 | 1973-05-29 | Inst Elektroswarki Patona | Method for electroslag remelting of metals with slag introduction |
-
1980
- 1980-11-14 RO RO80102590A patent/RO76187A2/fr unknown
-
1981
- 1981-10-09 EP EP81902808A patent/EP0064507A1/fr not_active Ceased
- 1981-10-09 US US06/555,434 patent/US4482376A/en not_active Expired - Fee Related
- 1981-10-09 WO PCT/RO1981/000006 patent/WO1982001677A1/fr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO8201677A1 * |
Also Published As
Publication number | Publication date |
---|---|
RO76187A2 (fr) | 1983-08-03 |
WO1982001677A1 (fr) | 1982-05-27 |
RO76187B1 (ro) | 1983-07-30 |
US4482376A (en) | 1984-11-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19820709 |
|
AK | Designated contracting states |
Designated state(s): DE FR GB |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 19900223 |
|
APAF | Appeal reference modified |
Free format text: ORIGINAL CODE: EPIDOSCREFNE |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: POPESCU, MIHAIL Inventor name: TARASESCU, MIHAIL Inventor name: CEAUSESCU, NICU Inventor name: BALACEANU, MIHAI Inventor name: POPOVICI, CONSTANTIN Inventor name: ASULTANEI, ALEXANDRU Inventor name: OPROIU, MARGARETA Inventor name: BUCUR, GRIGORE |