WO1996017703A1 - Conduit de coulee de metal liquide, procede et dispositif pour l'homogeneisation du metal - Google Patents
Conduit de coulee de metal liquide, procede et dispositif pour l'homogeneisation du metal Download PDFInfo
- Publication number
- WO1996017703A1 WO1996017703A1 PCT/FR1995/001602 FR9501602W WO9617703A1 WO 1996017703 A1 WO1996017703 A1 WO 1996017703A1 FR 9501602 W FR9501602 W FR 9501602W WO 9617703 A1 WO9617703 A1 WO 9617703A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conduit
- inductor
- metal
- turns
- mold
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D35/00—Equipment for conveying molten metal into beds or moulds
- B22D35/06—Heating or cooling equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/60—Pouring-nozzles with heating or cooling means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/22—Furnaces without an endless core
- H05B6/24—Crucible furnaces
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/22—Furnaces without an endless core
- H05B6/24—Crucible furnaces
- H05B6/26—Crucible furnaces using vacuum or particular gas atmosphere
Definitions
- the present invention relates to the casting of liquid metal for the manufacture of parts made of steels, superalloys and other metallic alloys, ferrous or not.
- the invention relates first of all to a casting duct of the closed cross-section type opening at one end through a pouring orifice for the supply of at least one mold and of the type comprising over its length at least one heating means constituted by a coil-shaped inductor whose cooled turns are traversed by an alternating electric current (-, U, F), said inductor being embedded in concrete which surrounds a refractory tube (see for example WO 94/17938 in the name of Applicant).
- a pipe is particularly advantageous for the casting of metals with high melting points.
- Said heating duct eliminates the risk of cooling and solidification of a metal alloy at a casting temperature at least equal to 1400 ° C. between two successive casting operations.
- this configuration of the conduit has some advantages compared to the conventional technique, such as that described for example by patent FR 2 532 866 in the name of PONT-A-MOUSSON SA linked to the simplicity of manufacture of the conduit (see the WO 94/17938 in the name of the Applicant).
- the invention aims to remedy these drawbacks.
- the homogeneous temperature of the metal makes it possible to standardize the conditions for filling and solidifying complex or multiple cavities in a foundry mold, hence the possibility of controlling the rates of defects (re-cracks, cracks, etc.) observed on the rooms.
- the conduit according to the invention achieves these results thanks to the asymmetrical turns.
- the coils of the inductor are offset and their density increases towards the end of the pouring orifice intended for supplying the mold.
- the turns of the inductor form a helix offset with respect to the conduit, towards the axis of revolution of the toroidal shell of this conduit.
- the coils of the inductor have a circular shape
- the subject of the invention is also a method aiming to obtain the same results.
- This process for homogenizing the temperature of a metal flowing in a conduit in the form of a portion of a torus of the type as described above is characterized in that an inductive current is assigned to the inductor frequency below 15,000 Hz.
- the invention also relates to a low pressure metal casting installation, of the type comprising a casting ladle comprising a source of pressurized gas opening into the upper part of the ladle and a metal outlet orifice, characterized in that that the outlet opens into a conduit conforming to that described above.
- Fig. 1 shows, in vertical section, a heated casting duct according to the invention.
- Fig. 2 shows, in vertical section, a low pressure metal casting installation comprising a duct of the type described in FIG. 1.
- the device shown in FIG. 1 is a duct 1 of the closed cross-section type opening at one end by an orifice 2 and comprising along its length a heating means constituted by an inductor 3 in the form of a coil whose cooled turns 4 are traversed by an alternating electric current ( -, U, F).
- Said inductor 3 is embedded in concrete 5 which surrounds a refractory tube 6.
- the turns 4 are asymmetrical with respect to the axes of symmetry of the conduit XX 'and YY'.
- the conduit has the shape of a torus portion whose axis of revolution passes through a point C.
- the axis YY ' corresponds to the radius of curvature passing through point C and is mediating at the two ends of the duct.
- the density of turns 4 is greater towards the end of the pouring orifice 2, because they are closer together on this side of the axis YY '.
- the inductor has the shape of a helix, the axis ZZ 'of which is closer to point C than the axis XX', so that the turns are found offset towards the inside of the concavity of the duct.
- the installation shown in FIG. 2 is a casting installation comprising a pocket 7 on which the duct 1 is fixed by a clamping means 8, known from the state of the art.
- the pocket and the conduit contain liquid metal 9, introduced by a lateral filling door 10.
- the pocket comprises a graphite rod 11 brought to high temperature and radiating on the surface of the metal.
- the upper part of the pocket comprises a pipe 12 which brings a pressurized gas flow into the pocket above the metal bath.
- Pressure adjustment equipment 13 is mounted on line 12; this equipment includes a pressure measurement device and a valve.
- a wedge 14 disposed under the conduit 1 makes it possible to fix the casting position.
- the pocket is tiltable by rotation on a roller system 15 and 16.
- the operation of the low pressure casting installation is as follows: the pocket is filled with metal 9.
- a mold (not shown) is brought into contact with the outlet 2. The mold is filled by applying the pressure of the gas coming from the pipe 12 to the surface of the metal. Several molds are filled consecutively.
- the casting duct 1 maintains the metal at a uniform temperature during and between each mold filling operation, by means of the inductor supplied with alternating current.
- the metal remaining at the bottom of the ladle is discharged through the filling door 10 by rotation on the rollers 15 and 16.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/849,378 US5853605A (en) | 1994-12-09 | 1995-12-05 | Liquid metal pouring duct, process and device for homogenizing metal |
EP95941767A EP0800427A1 (fr) | 1994-12-09 | 1995-12-05 | Conduit de coulee de metal liquide, procede et dispositif pour l'homogeneisation du metal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9415026A FR2727883B1 (fr) | 1994-12-09 | 1994-12-09 | Conduit de coulee de metal liquide, procede et dispositif pour l'homogeneisation du metal |
FR94/15026 | 1994-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996017703A1 true WO1996017703A1 (fr) | 1996-06-13 |
Family
ID=9469781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1995/001602 WO1996017703A1 (fr) | 1994-12-09 | 1995-12-05 | Conduit de coulee de metal liquide, procede et dispositif pour l'homogeneisation du metal |
Country Status (6)
Country | Link |
---|---|
US (1) | US5853605A (fr) |
EP (1) | EP0800427A1 (fr) |
CA (1) | CA2207300A1 (fr) |
FR (1) | FR2727883B1 (fr) |
WO (1) | WO1996017703A1 (fr) |
ZA (1) | ZA9510396B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19829191A1 (de) * | 1998-06-30 | 2000-01-05 | Be Automation Giesereitechnik | Druckvergiesseinrichtung |
US8056608B2 (en) | 2008-04-25 | 2011-11-15 | Goodwin Plc | Method of mitigating against thermal contraction induced cracking during casting of a super Ni alloy |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2532866A1 (fr) * | 1982-09-13 | 1984-03-16 | Pont A Mousson | Chenal de coulee chauffe par induction |
FR2670697A1 (fr) * | 1990-12-24 | 1992-06-26 | Pont A Mousson | Chenal pour la mise en óoeuvre d'un procede de coulee sous pression d'un alliage metallique. |
FR2701225A1 (fr) * | 1993-02-08 | 1994-08-12 | Seva | Procédé de fabrication d'un organe chauffant de transfert de métal liquide, organe chauffant, son application et son utilisation. |
-
1994
- 1994-12-09 FR FR9415026A patent/FR2727883B1/fr not_active Expired - Fee Related
-
1995
- 1995-12-05 US US08/849,378 patent/US5853605A/en not_active Expired - Fee Related
- 1995-12-05 EP EP95941767A patent/EP0800427A1/fr not_active Withdrawn
- 1995-12-05 CA CA002207300A patent/CA2207300A1/fr not_active Abandoned
- 1995-12-05 WO PCT/FR1995/001602 patent/WO1996017703A1/fr not_active Application Discontinuation
- 1995-12-07 ZA ZA9510396A patent/ZA9510396B/xx unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2532866A1 (fr) * | 1982-09-13 | 1984-03-16 | Pont A Mousson | Chenal de coulee chauffe par induction |
EP0103220A1 (fr) * | 1982-09-13 | 1984-03-21 | Pont-A-Mousson S.A. | Chenal de coulée chauffé par induction |
FR2670697A1 (fr) * | 1990-12-24 | 1992-06-26 | Pont A Mousson | Chenal pour la mise en óoeuvre d'un procede de coulee sous pression d'un alliage metallique. |
FR2701225A1 (fr) * | 1993-02-08 | 1994-08-12 | Seva | Procédé de fabrication d'un organe chauffant de transfert de métal liquide, organe chauffant, son application et son utilisation. |
WO1994017938A1 (fr) * | 1993-02-08 | 1994-08-18 | Seva | Procede de fabrication d'un organe chauffant de transfert de metal liquide, organe chauffant, son application et son utilisation |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19829191A1 (de) * | 1998-06-30 | 2000-01-05 | Be Automation Giesereitechnik | Druckvergiesseinrichtung |
US8056608B2 (en) | 2008-04-25 | 2011-11-15 | Goodwin Plc | Method of mitigating against thermal contraction induced cracking during casting of a super Ni alloy |
Also Published As
Publication number | Publication date |
---|---|
US5853605A (en) | 1998-12-29 |
EP0800427A1 (fr) | 1997-10-15 |
ZA9510396B (en) | 1996-06-13 |
FR2727883B1 (fr) | 1997-01-17 |
CA2207300A1 (fr) | 1996-06-13 |
FR2727883A1 (fr) | 1996-06-14 |
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