EP0566867A1 - Verfahren und Anordnung zur Herstellung gasarmer und porenfreier Aluminium-Gusslegierungen - Google Patents

Verfahren und Anordnung zur Herstellung gasarmer und porenfreier Aluminium-Gusslegierungen Download PDF

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Publication number
EP0566867A1
EP0566867A1 EP93104326A EP93104326A EP0566867A1 EP 0566867 A1 EP0566867 A1 EP 0566867A1 EP 93104326 A EP93104326 A EP 93104326A EP 93104326 A EP93104326 A EP 93104326A EP 0566867 A1 EP0566867 A1 EP 0566867A1
Authority
EP
European Patent Office
Prior art keywords
vacuum
continuous casting
melt
furnace
melting furnace
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.)
Withdrawn
Application number
EP93104326A
Other languages
German (de)
English (en)
French (fr)
Inventor
Heinz Lorenz
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.)
Vereinigte Aluminium Werke AG
Vaw Aluminium AG
Original Assignee
Vereinigte Aluminium Werke AG
Vaw Aluminium 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
Application filed by Vereinigte Aluminium Werke AG, Vaw Aluminium AG filed Critical Vereinigte Aluminium Werke AG
Publication of EP0566867A1 publication Critical patent/EP0566867A1/de
Withdrawn legal-status Critical Current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
    • 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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/113—Treating the molten metal by vacuum treating
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • C22B21/068—Obtaining aluminium refining handling in vacuum

Definitions

  • the invention relates to a method and an arrangement for producing low-gas and non-porous cast aluminum alloys.
  • Crucible or trough furnaces are usually used to produce cast alloys. Either liquid electrolysis metal is filled in or solid metal is melted. The intended alloy composition is adjusted by adding alloy components such as silicon, magnesium, copper, titanium, nickel. The molten bath is heated to dissolve and alloy the components. It absorbs more hydrogen because aluminum has a high solubility for hydrogen in the liquid state. This occurs when liquid aluminum is converted to water vapor and is immediately absorbed by the melt. The water vapor comes into contact with the liquid aluminum via the feed materials, the furnace and crucible linings, the tools, the melting and fluxing agents, the combustion of gaseous and liquid fuels and the air humidity.
  • the amount of dissolved hydrogen depends on the metal temperature, the alloy composition and the hydrogen partial pressure.
  • the hydrogen uptake is promoted by open burner flames or violent bath movements in induction furnaces.
  • alkali and alkaline earth metals such as strontium, sodium and calcium
  • the hydrogen content of the melt increases significantly again to values of over 0.3 ml of hydrogen in 100 g of metal, since the water vapor decomposition takes place even faster through these metals.
  • the melt should be cleaned as soon as possible, as a treatment that was carried out at an early stage by subsequent technological steps, such as. B. by pouring for the purpose of transporting the melt, in turn can lead to contamination.
  • the vacuum degassing of the melt is a particularly environmentally friendly and effective method.
  • the success of this method is particularly due to the complex transportation of the melt, interim cooling and remelting after the required alloying, refining and vacuum degassing processes up to continuous casting and the inevitable contact with the air humidity is not carried out optimally, so that as a result of the alloying and refining process and after the continuous casting, there are no low-gas and non-porous aluminum casting alloys.
  • the invention has for its object to provide a method and an arrangement for the production of low-gas and non-porous aluminum casting alloys, with which it is possible to keep the contact of the aluminum melt with the air humidity from the alloying process through the refinement to the continuous casting of the cast ingot extremely low , to use the environmentally friendly and effective vacuum degassing and to prevent the formation of large gas pores by a high cooling rate.
  • this object is achieved in that after the alloying of the molten metal in a melting furnace, the melt is fed directly to a vacuum furnace via a channel system, that finishing components are added in the vacuum furnace and the casting temperature required for the continuous casting is set so that the vacuum in the vacuum furnace is periodic Measurement of the metal density is held for a further 5 to 240 minutes and that the metal melt is then fed directly to the continuous casting system via the channel system, the metal melt being filtered before entering the continuous casting system.
  • the melt is fed from the melting furnace alternately or simultaneously into two vacuum furnaces, so that the continuous casting installation, which is preferably designed as a horizontal continuous casting installation, can be fed with melt continuously.
  • the metal density is measured while holding in a vacuum oven. This makes it possible to control the residence time of the melt under vacuum conditions. It is expedient for the size of the vacuum to be between 100 and 1 mbar while the vacuum is being maintained. The regulation of the duration of the vacuum essentially depends on the measured values of the metal density. It may well be necessary that its size be kept constant or varied while the vacuum is being held. For example, it is expedient for the vacuum to be as large as possible with increasing metal density while holding, so that the expulsion of the hydrogen is possible by further reducing its partial pressure despite increasing metal density.
  • the arrangement of the melting furnace, at least one vacuum melting furnace and the continuous casting plant, which are directly connected to one another via a channel system, make it possible to keep the metal in the melt at all times during the treatment process. Energy-consuming solidification and remelting processes are eliminated due to the optimal transport of the melt via the channel system.
  • a gradient is provided, which is realized by different levels of the furnaces and the continuous casting system or by a height-adjustable channel system.
  • the gutter system according to the invention is an open system, so that a control of the Melt flow is guaranteed at all times. Due to the short distances, the contact of the melt with the air humidity is minimal.
  • the melting furnace 1 in FIG. 1 is usually designed as a crucible or trough furnace. It is used to make alloys. Here the alloy components, such as silicon, magnesium, copper, titanium, nickel, etc., are lined up, a refining treatment with reaction and / or inert gases is carried out, and the metal temperature necessary for transferring the melt into the vacuum furnaces 2 is set. Following the gravity, the melt flows through the channel system 4 into the two vacuum furnaces 2. The capacity of the melting furnace 1 is so large that both vacuum furnaces 2 can be charged alternately.
  • the refinement components such as strontium, sodium, calcium are alloyed in here and the necessary treatment temperature with regard to the specified casting temperature set.
  • the alloy melt is subjected to a vacuum treatment, which is controlled according to the results of the metal density test.
  • the melt in the two vacuum furnaces 2 is fed in succession via the channel system 4 with the interposition of a ceramic shape filter 5 to the water-cooled horizontal continuous casting plant 3 and cast into format bars.
  • the low-gas, non-porous casting alloys produced in this way enable ductile, non-porous castings to be produced if they are melted properly again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
EP93104326A 1992-04-18 1993-03-17 Verfahren und Anordnung zur Herstellung gasarmer und porenfreier Aluminium-Gusslegierungen Withdrawn EP0566867A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4212936A DE4212936C2 (de) 1992-04-18 1992-04-18 Verfahren und Anordnung zur Herstellung gasarmer und porenfreier Aluminium-Gußlegierungen
DE4212936 1992-04-18

Publications (1)

Publication Number Publication Date
EP0566867A1 true EP0566867A1 (de) 1993-10-27

Family

ID=6457057

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104326A Withdrawn EP0566867A1 (de) 1992-04-18 1993-03-17 Verfahren und Anordnung zur Herstellung gasarmer und porenfreier Aluminium-Gusslegierungen

Country Status (13)

Country Link
US (1) US5330555A (cs)
EP (1) EP0566867A1 (cs)
KR (1) KR930021294A (cs)
AU (1) AU3693993A (cs)
CA (1) CA2091857A1 (cs)
CZ (1) CZ61593A3 (cs)
DE (1) DE4212936C2 (cs)
HU (1) HUT65416A (cs)
NO (1) NO931049L (cs)
SK (1) SK34193A3 (cs)
TR (1) TR26957A (cs)
TW (1) TW242588B (cs)
ZA (1) ZA931909B (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112795803A (zh) * 2020-12-27 2021-05-14 上海交通大学安徽(淮北)陶铝新材料研究院 一种带有粉料喷吹的原位自生铝基复合材料的系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1041900C (zh) * 1994-10-20 1999-02-03 邱表来 一种生产高强抗震铸铝件的真空挤压及热处理的方法
CN103436919B (zh) * 2013-08-22 2016-06-01 中冶东方工程技术有限公司 一种高温电解铝液熔铸前的预净化方法及产品
CN105087968A (zh) * 2014-05-13 2015-11-25 陕西宏远航空锻造有限责任公司 一种真空熔炼浇注生产铝合金铸件的优化生产方法
CN113684402B (zh) * 2021-09-01 2022-11-22 连云港星耀材料科技有限公司 具有良好韧性的稀土铝合金转向节制备方法及加工设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049248A (en) * 1971-07-16 1977-09-20 A/S Ardal Og Sunndal Verk Dynamic vacuum treatment
US4258099A (en) * 1978-10-21 1981-03-24 Bridgestone Tire Company Limited Cordierite, alumina, silica porous ceramic bodies coated with an activated alumina layer
EP0174061A1 (en) * 1984-05-16 1986-03-12 William Lyon Sherwood Continuous vacuum degassing and casting of steel
EP0191586A1 (en) * 1985-02-13 1986-08-20 Sumitomo Light Metal Industries Limited Electromagnetic levitation casting

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029687A1 (de) * 1970-06-16 1971-12-23 Deutsche Edelstahlwerke AG, 4150Krefeld Verfahren zum Abgießen von Metall oder Metallegierungen in Stranggußkokillen
JPS5967350A (ja) * 1982-10-08 1984-04-17 Toshiba Corp アルミニウム材
JPH0620618B2 (ja) * 1985-03-26 1994-03-23 日立電線株式会社 連続鋳造方法及びその装置
US4738717A (en) * 1986-07-02 1988-04-19 Union Carbide Corporation Method for controlling the density of solidified aluminum

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4049248A (en) * 1971-07-16 1977-09-20 A/S Ardal Og Sunndal Verk Dynamic vacuum treatment
US4258099A (en) * 1978-10-21 1981-03-24 Bridgestone Tire Company Limited Cordierite, alumina, silica porous ceramic bodies coated with an activated alumina layer
EP0174061A1 (en) * 1984-05-16 1986-03-12 William Lyon Sherwood Continuous vacuum degassing and casting of steel
EP0191586A1 (en) * 1985-02-13 1986-08-20 Sumitomo Light Metal Industries Limited Electromagnetic levitation casting

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 8, no. 168 (C-236)3. August 1984 & JP-A-59 067 350 ( TOSHIBA KK ) 17. April 1984 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112795803A (zh) * 2020-12-27 2021-05-14 上海交通大学安徽(淮北)陶铝新材料研究院 一种带有粉料喷吹的原位自生铝基复合材料的系统

Also Published As

Publication number Publication date
TR26957A (tr) 1994-09-12
ZA931909B (en) 1994-01-19
HUT65416A (en) 1994-06-28
KR930021294A (ko) 1993-11-22
TW242588B (cs) 1995-03-11
NO931049L (no) 1993-10-19
CA2091857A1 (en) 1993-10-19
NO931049D0 (no) 1993-03-23
CZ61593A3 (en) 1993-12-15
HU9301124D0 (en) 1993-08-30
SK34193A3 (en) 1993-11-10
DE4212936A1 (de) 1993-10-21
US5330555A (en) 1994-07-19
AU3693993A (en) 1993-10-21
DE4212936C2 (de) 1994-11-17

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