EP0846510A1 - Méthode et dispositif pour fabrication de bars en métal léger ou alliage léger, notamment de magnésium ou d'alliage de magnésium - Google Patents

Méthode et dispositif pour fabrication de bars en métal léger ou alliage léger, notamment de magnésium ou d'alliage de magnésium Download PDF

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Publication number
EP0846510A1
EP0846510A1 EP97120790A EP97120790A EP0846510A1 EP 0846510 A1 EP0846510 A1 EP 0846510A1 EP 97120790 A EP97120790 A EP 97120790A EP 97120790 A EP97120790 A EP 97120790A EP 0846510 A1 EP0846510 A1 EP 0846510A1
Authority
EP
European Patent Office
Prior art keywords
mold
light metal
melt
magnesium
alloy
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.)
Granted
Application number
EP97120790A
Other languages
German (de)
English (en)
Other versions
EP0846510B1 (fr
Inventor
Dieter Dr. Ing. Brungs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honsel AG
Original Assignee
Honsel AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19710887A external-priority patent/DE19710887C2/de
Application filed by Honsel AG filed Critical Honsel AG
Publication of EP0846510A1 publication Critical patent/EP0846510A1/fr
Application granted granted Critical
Publication of EP0846510B1 publication Critical patent/EP0846510B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/06—Ingot moulds or their manufacture
    • 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
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • 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
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould

Definitions

  • the invention relates to a method and an apparatus for Manufacture of bars of light metal or one Light metal alloy, especially made of magnesium or one Magnesium alloy with a diameter of 60 to 400 mm.
  • the manufacture of light metal, in particular Magnesium bars are made according to the current state of the art usually in that casting strands with a large diameter, preferably 400 to 600 mm diameter by means of known Continuous casting process can be cast. After that, a cutting Machining the surface of the cast strands to remove the Cast edge shell take place. Finally, the casting strand is through Extrusion to the desired bar dimensions brought.
  • Bars of light metal or a light metal alloy, especially made of magnesium or a magnesium alloy for experimental purposes with conventional casting techniques, e.g. B. in Sand casting processes are produced.
  • the structural properties are however, because of the extremely slow solidification rates for further processing, especially extrusion, is unfavorable.
  • a one-off production requires a very high manual effort for the production of molds and the further processing of the Cast blanks.
  • the casting blank must be freed from the sprue and barrel system and all around to the finished size for further processing to be edited. Thanks to the large-volume sprue and riser system as well as the machining also results for the Sand casting process has a very low output in the Order of magnitude by about 50%. For mass production of bars the sand casting process is therefore not suitable.
  • the conventional, water-cooled continuous casting of magnesium or Magnesium alloy is used in small formats because of that associated explosion risk is not suitable.
  • the invention is based on the problem, a method and a Device for the production of bars, in particular pressed bars
  • Light metal or a light metal alloy in particular from Magnesium or a magnesium alloy, with a diameter of To create 60 - 400 mm, which is both for series production as well as for one-off production for small quantities and short-term coverage is suitable.
  • the bars should have the desired dimensions without further processing, so that there is no machining of the bar surfaces or can be reduced to a minimum. After all, the Total output can be increased to about 80% and above.
  • Such molds can be quickly extruded any internal diameter or cross-section as well as with Make cooling fins or cooling channels, so that by means of this Ingot bars already produced are the ones for which Further processing required dimensions without additional processing steps are required.
  • the preferred used mold made of aluminum or an aluminum alloy already has such a high cooling effect in still air that a additional cooling is generally not required.
  • the cooling effect of the mold can be increased if necessary easily achieved by blowing with air. Of further it is also possible to use increased cooling to reach a water mist.
  • the coolant can pass through the channels are directed, which in this case is gaseous or can be liquid, or as a water mist through the Coolant channels can be performed.
  • the inner surface of the metal mold can be used with a conventional one Be simple, and metals are used as the mold material into question, which can be formed by extrusion and a have high thermal conductivity. Preferably therefore come for the mold aluminum or aluminum alloys in question.
  • the light metal or Light metal alloy melts, especially the magnesium or Magnesium alloy melt, from above into the mold extruded profile used with increasing metal level filled.
  • One serves as the lower end for the mold Metal plate, preferably a steel plate, which can also be cooled can.
  • the melt is always supplied during casting below the melt surface, preferably in such a way that a constant distance one into the melt immersed melt nozzle from the melt surface by means of a swimmer by lowering the mold or lifting the Melt nozzle is set.
  • a quiet metal feed without swirls and turbulence can also can be achieved without using a float by using the Lowering the mold or raising the melt nozzle as a function the mold filling speed is controlled so that the The melt nozzle always remains immersed in the melt.
  • a light metal-resistant filter in the melt nozzle can also cause a quiet metal supply and diminishes or also avoids the introduction of oxides and / or Contamination in the mold.
  • the ingot By shrinking the light metal or the Light metal alloy, especially of magnesium or Magnesium alloy, during the solidification process the ingot easily from the extruded profile used as a mold remove.
  • the extruded profile used as a mold does not require any rework and is immediately available for others Use available.
  • the process is characterized by a very high output, there is a necessary waste at most on the lowest area of the ingot at which it is initially filled the light metal or light metal alloy melt, in particular the magnesium or magnesium alloy melt, to turbulence and oxide inclusions comes and that only with appropriate Cleanliness requirements must be separated.
  • the entire remaining material up to the top metal mirror can be used directly for further processing can be used.
  • the Surface of the cast blank cleaned by blasting or else slightly machined to a metallic clean Get surface if appropriate requirements on the Products to be manufactured, in particular extruded profiles.
  • the light metal or Light metal alloy melt especially the magnesium or Magnesium alloy melt, also from below into the mold extruded profile used with increasing metal level be filled in.
  • process variants come e.g. B. that Low pressure casting process or also the gravity casting process with increasing mold filling in question.
  • the device for producing bars of light metal or a light metal alloy, especially magnesium or one Magnesium alloy, with a diameter of 60 to 400 mm a mold on that as a tube with a smooth outer wall or with Cooling fins and / or coolant channels is provided and off extruded aluminum or an extruded Aluminum alloy is made.
  • the mold can be in one piece or be composed of several parts from extruded profile segments and a base made of a metal plate, which can also be cooled, exhibit.
  • a float can be provided to ensure melt surface be that controls the melt supply.
  • a light metal-resistant filter can be used in the melt nozzle be arranged.
  • a Thermal insulation may be provided.
  • This thermal insulation can be considered the inside and / or the outside of the mold in the upper Area arranged, heat-insulating coating formed be. Instead of or in addition to this coating, too a heat-insulating attachment can be provided on the mold.
  • This attachment can be made from a piece of pipe made of molding sand preferably tapered upwards, consist.
  • the process can take the form of a Belt manufacturing or carousel manufacturing can be used.
  • the cooling section which solidifies and takes out the ingot from the mold is needed. It can also be poured in multiple strands at the same time by using a corresponding distribution pan above several molds is worked.
  • An extruded mold 1 made of aluminum or one Aluminum alloy has a tube wall 2 with one of the desired Diameter of the ingot corresponding to the inside diameter and radial cooling fins 3.
  • the mold 1 rests on a base plate 4 made of metal, and the whole is carried out by a lowering device 10 carried.
  • the bottom plate 4 can, as shown in Fig. 4, Have cooling channels 16.
  • a melt nozzle 6 projects into the mold 1 inside, made of a light metal, in particular magnesium-resistant material. With the nozzle 6 is a Float 7 also made of light metal, in particular magnesium-resistant material, which ensures that Light metal or light metal alloy melt or the Magnesium or magnesium alloy melt 8 always with one uniform distance to a melt surface 9 in the mold 1 is introduced.
  • the lowering device 10 is in accordance with the casting speed lowered until the mold is filled with molten metal.
  • the melt is cooled in still air or by Blowing the cooling fins with air or spraying with a Water mist accelerates.
  • the mold can also be used as smooth tube without cooling fins.
  • bars can be created with one of the Make the height of the mold of the appropriate length.
  • the nozzle 6 according to the Raising the casting speed instead of lowering the mold 1.
  • Fig. 3 shows one Chill segments 11 existing mold, in the tube wall 12th Coolant channels 13 are arranged.
  • outside Cooling fins 14 are shown, which, however, are not required, if the cooling through the led through the coolant channels 13 Coolant is sufficient.
  • Chill mold consists of four mold segments 11, which, for. B. means a dovetail connection 15 form-fitting with each other are connected, however, the mold can also consist of less or more Mold segments exist.
  • the cross section of the mold can, as shown, be circular but can also have other cross-sectional shapes.
  • the cooling rate on the wall 2 of the mold is like this great that the one made of aluminum or an aluminum alloy extruded mold 1 also for the production of ingots Aluminum or an aluminum alloy is suitable.
  • a heat-insulating coating 18, 19 to be appropriate.
  • the same purpose can also be achieved through a Fig. 8 shown attachment 20 in the form of a conical reach the constricting pipe section made of molding sand, which alone or in addition to the coating 18, 19 in FIG Forms heat insulation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Extrusion Of Metal (AREA)
EP97120790A 1996-12-03 1997-11-27 Utilisation d'une coquille pour fabrication de bars en métal léger ou alliage léger, notamment de magnésium ou d'alliage de magnésium Expired - Lifetime EP0846510B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19650074 1996-12-03
DE19650074 1996-12-03
DE19710887A DE19710887C2 (de) 1996-12-03 1997-03-15 Verwendung einer Kokille zum Herstellen von Barren aus Leichtmetall oder einer Leichtmetallegierung, insbesondere aus Magnesium oder einer Magnesiumlegierung
DE19710887 1997-03-15

Publications (2)

Publication Number Publication Date
EP0846510A1 true EP0846510A1 (fr) 1998-06-10
EP0846510B1 EP0846510B1 (fr) 2001-05-23

Family

ID=26031831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97120790A Expired - Lifetime EP0846510B1 (fr) 1996-12-03 1997-11-27 Utilisation d'une coquille pour fabrication de bars en métal léger ou alliage léger, notamment de magnésium ou d'alliage de magnésium

Country Status (3)

Country Link
EP (1) EP0846510B1 (fr)
JP (1) JPH10166136A (fr)
AT (1) ATE201343T1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4993874B2 (ja) * 2005-05-06 2012-08-08 京セラ株式会社 シリコンインゴット用の鋳型

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2264456A (en) * 1937-05-12 1941-12-02 Ver Leichtmetallwerke Gmbh Method of casting metals
US3338296A (en) * 1964-04-02 1967-08-29 Aluminum Co Of America Method of casting aluminum
US4071072A (en) * 1973-11-06 1978-01-31 Alcan Research And Development Limited Method of direct chill casting of aluminum alloys
DE3218100A1 (de) * 1982-05-13 1983-11-17 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur herstellung einer rohrkokille mit rechteckigem bzw. quadratischem querschnitt
DE3514123A1 (de) * 1985-04-19 1986-10-23 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur herstellung von durchlaufkokillen fuer stranggussmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2264456A (en) * 1937-05-12 1941-12-02 Ver Leichtmetallwerke Gmbh Method of casting metals
US3338296A (en) * 1964-04-02 1967-08-29 Aluminum Co Of America Method of casting aluminum
US4071072A (en) * 1973-11-06 1978-01-31 Alcan Research And Development Limited Method of direct chill casting of aluminum alloys
DE3218100A1 (de) * 1982-05-13 1983-11-17 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur herstellung einer rohrkokille mit rechteckigem bzw. quadratischem querschnitt
DE3514123A1 (de) * 1985-04-19 1986-10-23 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur herstellung von durchlaufkokillen fuer stranggussmaschinen

Also Published As

Publication number Publication date
EP0846510B1 (fr) 2001-05-23
JPH10166136A (ja) 1998-06-23
ATE201343T1 (de) 2001-06-15

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