EP1877209B9 - Verfahren zum herstellen von masseln und masseln - Google Patents

Verfahren zum herstellen von masseln und masseln Download PDF

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Publication number
EP1877209B9
EP1877209B9 EP06742695A EP06742695A EP1877209B9 EP 1877209 B9 EP1877209 B9 EP 1877209B9 EP 06742695 A EP06742695 A EP 06742695A EP 06742695 A EP06742695 A EP 06742695A EP 1877209 B9 EP1877209 B9 EP 1877209B9
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EP
European Patent Office
Prior art keywords
formation
melt
pigs
energy
temperature
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.)
Not-in-force
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EP06742695A
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German (de)
English (en)
French (fr)
Other versions
EP1877209B1 (de
EP1877209A1 (de
Inventor
Evgenij Sterling
Hugo Berger
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Individual
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Publication of EP1877209B1 publication Critical patent/EP1877209B1/de
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Publication of EP1877209B9 publication Critical patent/EP1877209B9/de
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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
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D3/00—Pig or like casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D46/00—Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons

Definitions

  • the invention relates to methods for producing ingots of a metal alloy, in which a melt is formed in which a base material and one or more alloying constituents are in the liquid state from which the ingots are formed.
  • Aluminum or cast aluminum alloys are usually provided as semi-finished products in the form of two-piece or three-piece ingots for further processing by casting. To produce the pigs, a melt of the respective metal alloy is formed, which is then poured into ingots.
  • the invention according to claim 1 is based on the object to provide a method for the production of pigs, which lead in the further processing to cast workpieces with improved properties without changes to the previous casting machines must be made. Special embodiments are given in the dependent claims.
  • This object is achieved by briefly introducing energy into the melt prior to forming the ingots during cooling by means of a variable physical field which increases the formation of mixed crystals.
  • mixed-crystal unit cells initially form, in which atoms of the base material are substituted by atoms of the additional constituent (s).
  • the formation of enriched mixed crystals is specifically achieved, whereby the saturation limit and the width of the concentration-temperature interval are controlled by means of the external variable physical field, so that oversaturated mixed crystals are formed with impurities.
  • the saturation limit and the increased diffusion of foreign atoms into the space lattice of the base material is not temperature-dependent. Upon further cooling, a fairly fine-grained microstructure of these mixed crystals is formed.
  • the supply of energy takes place at a temperature approximately at the liquidus line of this metal alloy.
  • the time for which the energy supply is to be carried out must be determined experimentally. It is dependent on the specific metal alloy and also on the means by which the energy supply is carried out.
  • the mixed crystal formation is detected by measuring the dynamic viscosity of the melt located in the treatment chamber. The invention assumes that an optimum of the solid solution formation manifests itself when the treated melt, despite the cooling, has reached a particularly low-viscosity state which remains approximately constant and then no longer changes significantly.
  • the formation of mixed crystals is determined by means of measurements of the liquidus temperature of samples taken from the treatment chamber.
  • the invention is based on the fact that the actual liquidus temperature proves to be a kink in the cooling curve due to the heat of crystallization arises. This actual liquidus temperature, if successfully treated, is below the liquidus line given for a state diagram for that metal alloy.
  • the short-term power supply by means of a varying, preferably pulsating electromagnetic field.
  • ingots produced in this way in the manner of a memory effect have the increased flowability produced by means of the treatment in the electromagnetic field even when they are re-melted and processed in a casting machine.
  • treated pigs have an increased flowability compared to the ingots produced by conventional methods, so that castings with complicated shapes and increased density can be produced.
  • the castings produced in this way have increased strength, improved stretch behavior and improved wear behavior. You can partially replace components that previously had to be forged.
  • a melting furnace which has a pouring opening 1, a melting channel 2 and an electric heater 3, the constituents of a metal or a metal alloy are heated to such an extent that all constituents are melted and form a melt 4.
  • This melt 4 is brought through a filling opening 19 into a treatment chamber.
  • This treatment chamber consists of a substantially cylindrical housing part 18, a hemispherical lower part 10 and an approximately hemispherical upper part 7.
  • the treatment chamber is associated with a preferably electric heater 6 in the form of heating coils, with which the treatment chamber to a temperature in the range and for example slightly below the liquidus line of the special metal alloy is heated, for example, to about the eutectic temperature of the metal alloy.
  • the treatment chamber is associated with a device 5 introducing energy, for example by generating a rotating electromagnetic field.
  • This electromagnetic field has, for example, a field strength of 6 to 20 mT and rotates at a frequency of about 60 Hz to 500 Hz.
  • the two-phase is shrinking continuously due to sinking liquidus temperature and simultaneously increasing solidus temperature, so that the Konode becomes shorter.
  • the melt 11 is removed by means of a removal robot 12 of the treatment chamber and filled in ingots 14, which are transported on a mass train 13.
  • the ingot molds 14 are emptied, so that then empty ingot molds 17 can again be supplied to the removal robot 12.
  • the highest flowability or lowest viscosity which is an indication of the increased solid solution formation, is measured by means of a viscometer 8 online in the treatment chamber, so that it can be determined at any time whether the desired state for the melt 11 has been reached.
  • the external energetic action changes the energetic state of the liquid crystalline base crystal. His space grid is loosened up, facilitating the process of building new atomic groupings.
  • the energy and the bonding forces between the atoms of individual components and structural units of the metal alloys emerge as one of the decisive factors.
  • the viscosity is one of these properties.
  • the construction and remodeling of atomic complexes leads to a release of strong compounds, which were rather closed inside the complexes. These compounds participate in the viscous flow and also in dislocations of structural units.
  • a decreasing viscosity is therefore attributed to an atomic complex having the weakened inner and starched outer compounds.
  • This creates the technological-physical prerequisites under which collective areas with a uniform orientation are built up in the liquid-crystalline system.
  • the new structuring and its energetic stability are enhanced by the variable electromagnetic field.
  • the result is the lower viscosity, which reflects the energetic state of the space lattice or microstructure units of the melt.
  • the fluidity can be displayed on a monitor 16, for example.
  • the maximum flowability is achieved when the fluidity no longer increases significantly, ie, has reached the approximately horizontal branch of the curve shown on the monitor 16 of the flowability ⁇ over time t.
  • samples of the melt 11 are taken from the treatment chamber and analyzed.
  • it can be displayed on another monitor 9 how the liquidus temperature T L changes and has approached the liquidus line of the specific metal alloy of the solidus temperature line Ts.
  • a picture of the temperature T over the time t can be displayed on a monitor 9.
  • the build-up process of the supersaturated mixed crystal, which had begun in the liquid-crystalline system, is completed during the cooling of the alloy, so that the preparation of a realistic state diagram is possible.
  • thermodynamic Representation covers a wide range of alloy properties, such as concentration indication, liquidus solidus line, saturation limit (solubility), etc., which allow to set the appropriate technological casting parameters for the alloy produced by the process of the present invention.
  • ingots which have been produced by the above process are further processed, resulting in advantageous conditions.
  • the increase in fluidity resulting from the treatment is not reversible because the mixed crystals are stable.
  • the melt produced during further processing from molten ingots has an improved flowability and a lower tendency to oxidation. As the pigs melt, less scabies appear on the surface of the bath.
  • the invention is based on the fact that the external energetic action, ie the interaction between an external electromagnetic field and an internal electromagnetic field of the crystal, influences an amplification of the diffusion process and interatomic compounds.
  • the result of this interaction is a construction of an alloy whose crystals in the molten state have a far-reaching order or distance order.
  • This interaction can also be controlled by having an alloying component is added, which differs from the base material by the magnetic susceptibility.
  • the invention is particularly suitable for metal alloys in which the base material is aluminum and the main additive component is silicon. In principle, however, the invention is applicable to all metal alloys, regardless of the magnetic susceptibility of the constituents.
  • the external energetic action takes place in the embodiment by means of a varying, pulsating electromagnetic field. However, other possibilities for external energetic action by means of a variable physical field are also readily given, for example an action by means of ultrasound. In this case, the field is designed so that the conditions resulting from the above-described electromagnetic field are also obtained.
  • the pigs according to the invention are suitable for all casting processes.
  • the high flowability is of particular advantage
  • die casting the excellent formability is of particular advantage. It is believed that, as the ingots melt, the new atomic arrangement in the space lattice obtained by the diffusion pretreatment is retained even when the ingots are melted, without the atoms of the alloying components giving up their places in the aluminum lattice.
  • pigs according to the invention not only the commercial forms of pigs are understood. Rather, it should be understood to mean any form in which a processed melt is poured off before re-melting for a casting process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP06742695A 2005-05-04 2006-04-26 Verfahren zum herstellen von masseln und masseln Not-in-force EP1877209B9 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005021891A DE102005021891B4 (de) 2005-05-04 2005-05-04 Verfahren zum Herstellen von Masseln und Massel
PCT/EP2006/003853 WO2006117111A1 (de) 2005-05-04 2006-04-26 Verfahren zum herstellen von masseln und masseln

Publications (3)

Publication Number Publication Date
EP1877209A1 EP1877209A1 (de) 2008-01-16
EP1877209B1 EP1877209B1 (de) 2012-10-03
EP1877209B9 true EP1877209B9 (de) 2013-01-02

Family

ID=36758421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06742695A Not-in-force EP1877209B9 (de) 2005-05-04 2006-04-26 Verfahren zum herstellen von masseln und masseln

Country Status (15)

Country Link
US (1) US8459330B2 (es)
EP (1) EP1877209B9 (es)
JP (1) JP2008540129A (es)
KR (1) KR101292294B1 (es)
CN (1) CN101232962B (es)
AU (1) AU2006243414B2 (es)
BR (1) BRPI0611437A2 (es)
CA (1) CA2606833C (es)
DE (1) DE102005021891B4 (es)
ES (1) ES2397589T3 (es)
MX (1) MX2007013685A (es)
NO (1) NO20076218L (es)
RU (1) RU2421297C2 (es)
WO (1) WO2006117111A1 (es)
ZA (1) ZA200709285B (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102703679B (zh) * 2012-06-19 2013-06-05 安徽工业大学 采用低压脉冲电流改善含铌钢铸坯角部裂纹和热送裂纹的方法
CA3136986A1 (en) 2019-05-06 2020-11-12 Kamran Ansari Therapeutic arrays of planar coils configured to generate pulsed electromagnetic fields and integrated into clothing
US11020603B2 (en) 2019-05-06 2021-06-01 Kamran Ansari Systems and methods of modulating electrical impulses in an animal brain using arrays of planar coils configured to generate pulsed electromagnetic fields and integrated into clothing

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DE311295C (es) *
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JPH02166241A (ja) * 1988-12-20 1990-06-26 Suzuki Motor Co Ltd 複合材料の製造方法
JPH10137930A (ja) 1996-11-12 1998-05-26 Matsushita Electric Ind Co Ltd 半田吐出方法およびその吐出装置
EP1077098B1 (de) * 1999-08-18 2004-03-03 SUG Schmelz- und Giessanlagen GmbH Verfarhen und Vorrichtung zur Herstellung von vorzugsweise einteiligen Legierungskörpern aus Flüssigmetall
DE10002670C2 (de) * 2000-01-24 2003-03-20 Ritter Aluminium Giesserei Gmb Druckgießverfahren und Vorrichtung zu seiner Durchführung
JP4065099B2 (ja) 2000-08-11 2008-03-19 新日本製鐵株式会社 溶鋼の連続鋳造方法および連続鋳造鋳片
JP3737440B2 (ja) * 2001-03-02 2006-01-18 三菱アルミニウム株式会社 耐熱マグネシウム合金鋳造品およびその製造方法
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EP1358956A1 (de) * 2002-04-24 2003-11-05 Alcan Technology & Management Ltd. Verfahren zur Verarbeitung einer Metalllegierung zu einem teilfesten/teilflussigen Formkörper
JP3520991B1 (ja) * 2002-09-25 2004-04-19 俊杓 洪 固液共存状態金属材料の製造方法
JP3549054B2 (ja) 2002-09-25 2004-08-04 俊杓 洪 固液共存状態金属材料の製造方法、その装置、半凝固金属スラリの製造方法およびその装置
JP3496833B1 (ja) 2002-09-25 2004-02-16 学校法人延世大学校 固液共存状態金属材料の製造方法
JP3949557B2 (ja) 2002-10-08 2007-07-25 株式会社大紀アルミニウム工業所 鋳造用耐摩耗性アルミニウム合金および同アルミニウム合金鋳物
CN1425519A (zh) * 2002-10-25 2003-06-25 东北大学 铝合金低频电磁振荡半连续铸造晶粒细化方法及装置
CN1425520A (zh) * 2002-10-25 2003-06-25 东北大学 铝合金低频电磁半连续铸造方法及装置
KR100436118B1 (ko) * 2003-04-24 2004-06-16 홍준표 반응고 금속 슬러리 제조장치
KR100436117B1 (ko) * 2003-04-24 2004-06-16 홍준표 반응고 성형장치
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JP3990654B2 (ja) 2003-07-02 2007-10-17 本田技研工業株式会社 半凝固金属スラリーの製造装置及びその制御方法並びに半凝固金属スラリーの製造方法
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Also Published As

Publication number Publication date
RU2007143897A (ru) 2009-06-10
WO2006117111A1 (de) 2006-11-09
KR20080005248A (ko) 2008-01-10
AU2006243414A1 (en) 2006-11-09
EP1877209B1 (de) 2012-10-03
KR101292294B1 (ko) 2013-08-01
BRPI0611437A2 (pt) 2010-09-08
ES2397589T3 (es) 2013-03-08
EP1877209A1 (de) 2008-01-16
ES2397589T9 (es) 2013-03-20
AU2006243414B2 (en) 2010-11-04
ZA200709285B (en) 2008-11-26
CA2606833A1 (en) 2006-11-09
US8459330B2 (en) 2013-06-11
US20090304542A1 (en) 2009-12-10
JP2008540129A (ja) 2008-11-20
NO20076218L (no) 2007-12-03
DE102005021891A1 (de) 2006-11-16
DE102005021891B4 (de) 2011-12-22
CN101232962B (zh) 2012-01-04
CN101232962A (zh) 2008-07-30
RU2421297C2 (ru) 2011-06-20
MX2007013685A (es) 2008-03-18
CA2606833C (en) 2014-04-15

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