EP2270248A2 - Procédé de fabrication d'un pré-alliage et son utilisation - Google Patents

Procédé de fabrication d'un pré-alliage et son utilisation Download PDF

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Publication number
EP2270248A2
EP2270248A2 EP10450059A EP10450059A EP2270248A2 EP 2270248 A2 EP2270248 A2 EP 2270248A2 EP 10450059 A EP10450059 A EP 10450059A EP 10450059 A EP10450059 A EP 10450059A EP 2270248 A2 EP2270248 A2 EP 2270248A2
Authority
EP
European Patent Office
Prior art keywords
sprue
aluminum
casting
alloy
cast
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Withdrawn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
EP10450059A
Other languages
German (de)
English (en)
Other versions
EP2270248A3 (fr
Inventor
Franz Dipl.-Ing. Schörghuber
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.)
MAGNALUM METALLURGIE GMBH
Original Assignee
LMT Metallurgie GmbH
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 LMT Metallurgie GmbH filed Critical LMT Metallurgie GmbH
Publication of EP2270248A2 publication Critical patent/EP2270248A2/fr
Publication of EP2270248A3 publication Critical patent/EP2270248A3/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
    • C22C47/08—Making alloys containing metallic or non-metallic fibres or filaments by contacting the fibres or filaments with molten metal, e.g. by infiltrating the fibres or filaments placed in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
    • B22C9/086—Filters
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
    • C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
    • C22C49/04—Light metals
    • C22C49/06—Aluminium

Definitions

  • the invention relates to a method for producing and using a master alloy for alloying aluminum and aluminum alloys.
  • Aluminum and aluminum alloys as well as filters, sieves and cast sieves as well as sprues and sprues are for the sake of simplicity regarded as equal synonyms and therefore not always listed side by side.
  • Rims or chassis parts made of aluminum alloys are often produced by low-pressure casting (eg DE 20 2004 014 151 U1 ). The molten metal rises through a riser pipe and is passed from below through a nozzle into a casting mold.
  • the metallic cast sieve is usually inserted into the nozzle, wherein the Eingusssieb is taken after the solidification of the metal in the sprue usually together with the casting from the mold. In the sprue then the Eingusssieb remains firmly embedded. Thus, before each new casting a new Eingusssieb must be used in the nozzle or in the sprue area, as this remains in the solidified sprue of the previous casting.
  • a material for cast filters usually either wire mesh or mesh or slit plates made of iron or steel or ceramic fibers are used. Also, inserts of open cell or cellular ceramic materials, preferably at other locations in the casting system, e.g. in the lower part of the riser. For example, the following requirements are imposed on a material for metallic cast-in sieves:
  • the cast screens used must not melt during mold filling and solidification at the usual casting temperatures of aluminum alloys, i. their melting point should be significantly higher than the casting temperature of the aluminum alloy used.
  • the used cast-in sieves must not be chemically attacked or dissolved as far as possible by the aluminum alloy used, ie the materials used should be the same when casting Conditions (relatively low temperatures and short contact times) have the lowest possible solubility.
  • the cast sieves used should have sufficient mechanical strength during the mold filling at the usual casting temperature of the aluminum alloy used and can withstand the mechanical action of the melt when flowing through without significant change in shape.
  • the cast sieves used should not be too brittle and sufficiently ductile, so that components of the cast sieve do not break off or come off during mold filling due to the mechanical action of the flow through the melt or due to the mechanical stress of the holding device for the cast sieve and into the mold cavity and thus get into the casting.
  • the materials for the cast sieves used should be sufficiently ductile to be able to produce from them sufficiently thin wire or sheet and subsequently braids, fabrics or split sheets which are suitable die linings adapted to the geometry of the die, e.g. Hats, pots or cups to realize.
  • the invention has for its object to provide a method with which the reusability of sprinkled with filters or sieves sprue and the like in its own melting circuit allows and / or the value of the sprue for resale in a simple Way can be increased.
  • the invention achieves this object by first introducing a cast alloy comprising aluminum and at least one non-ferrous alloying element into a casting mold, after which the sprue removed and hardened with the cast iron contained therein and consisting of a non-ferrous alloying element of the aluminum in further consequence forms a master alloy for alloying aluminum in a further process step.
  • the invention it is provided to provide cast-in from at least one non-ferrous metal alloying element of aluminum, which has a higher melting point than aluminum and meets the aforementioned requirements in a wide range.
  • the Eingusssieb dissolves in a melting of the sprue in the aluminum melt and then serves as Alloy element for alloying pure aluminum or for supplementing the relevant element in an already existing alloy (alloy correction).
  • the sprue containing the gate is removed from the casting in a conventional manner (e.g., sawing, boring, squeezing).
  • the sprue containing the sprue is removed from the casting after hardening and brought to a presettable standard weight, preferably cut to length. This creates sprues of aluminum with an alloying element containing a certain percentage.
  • These sprue pins then serve as a master alloy for alloying aluminum and can thus be reused or resold without impairing the base alloy in its own melting cycle.
  • a sprue with a cast-in sieve made of a non-ferrous metal used as an alloying element for aluminum serving element, in particular of titanium or titanium alloys advantageous conditions for further use of the sprue in its own melting cycle, for example in rim manufacture, created.
  • the material for cast-in screens is made of a material which does not dissolve, or only to such an extent, when it flows through the molten metal during the casting of a casting mold in the aluminum alloy, that the upper limit for this element be it as an alloying element or as "other Contamination "within the regulation for the alloy composition concerned.
  • the cast-in sieves should as completely as possible be dissolved in the aluminum alloy.
  • sprue lugs incorporating molded screens of such material may be used as one of these elements be considered and also processed, which could replace a pre-alloy already in use, containing the element in question, partially or wholly.
  • an additional increase in value is achieved.
  • the presence of, for example, titanium or high-titaniferous alloys in the gate in the form of a cast screen consisting of comparatively thin wires or slit plates promotes the dissolution of the titanium in an aluminum melt under the conditions prevailing in the furnace during alloy production (relatively long times, relative to high temperatures).
  • the value of the original alloy from which these gating pins mainly consist is thus not only not diminished but even increased by the metallic cast-in sieves poured therein.
  • the requirements for a material for a cast sieve are met in an ideal manner when titanium or high-titanium-containing alloys or nickel or high-nickel-containing alloys are used as the material.
  • titanium or high-titanium-containing alloys or nickel or high-nickel-containing alloys are used as the material.
  • aluminum rims on titanium-containing master alloys and for casting of aluminum pistons on nickel-containing master alloys can be used.
  • Example 2 A common pricing formula for AlSi7Mg ingots made from 99.7% primary aluminum is the LME quotation for pure aluminum plus an alloying premium of $ 310 per tonne.
  • the sales proceeds of sprue pins made of this alloy with an iron content of about 6% are only. 40-50% of the LME quotation for pure aluminum.
  • sprue plugs, which contain about 5% titanium or titanium alloy inlays a sales proceeds of 110% of the LME quotation for pure aluminum are achieved due to the very low iron content of this primary material.
  • Example 3 The sprues of AlSi7Mg and AlSi11 accumulated over a certain period of time with sieve inserts of the common titanium alloy Ti6Al4V produced from slit plates are melted down in a medium-frequency furnace. The average proportion of gate burners in the sprue is 3.6%. After complete dissolution of the titanium sieves, the silicon content of the melt is 8.71%, the iron content 0.12%, the titanium content 3.04%, and the vanadium content 0.22%. This melt is poured off in the form of wafer plates and is available as an Al-Si-Ti master alloy for addition in the smelting plant.
  • the removed sprue pins from previous castings incorporating these cast sieves serve firstly as a partial or complete replacement for a commercial master alloy already in use which is added to a melt batch to increase that alloying element in the melt, from which the sieve itself mainly consists.
  • Figure 1 shows the solubility of titanium in aluminum compared to the solubility of iron in liquid aluminum, which is shown in Figure 2. It follows that the solubility of titanium in aluminum at conventional casting temperatures, for example, 700 ° C is relatively low. At higher temperatures, however, solubility increases and provides good dissolution behavior of titanium during alloy production.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
EP10450059.0A 2009-06-18 2010-04-14 Procédé de fabrication d'un pré-alliage et son utilisation Withdrawn EP2270248A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT9422009A AT508003B1 (de) 2009-06-18 2009-06-18 Verfahren zum herstellen einer vorlegierung und verwendung derselben

Publications (2)

Publication Number Publication Date
EP2270248A2 true EP2270248A2 (fr) 2011-01-05
EP2270248A3 EP2270248A3 (fr) 2018-01-17

Family

ID=42782062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10450059.0A Withdrawn EP2270248A3 (fr) 2009-06-18 2010-04-14 Procédé de fabrication d'un pré-alliage et son utilisation

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EP (1) EP2270248A3 (fr)
AT (1) AT508003B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020186280A1 (fr) 2019-03-19 2020-09-24 Fill Gesellschaft M.B.H. Dispositif de transport de métal fondu, ainsi que procédé de transport de métal fondu et un procédé de coulée de métal fondu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107824763A (zh) * 2017-11-09 2018-03-23 江苏神马电力股份有限公司 一种铸造模具

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2848005A1 (de) 1977-11-25 1979-06-07 Alusuisse Verfahren und vorrichtung zum filtrieren von geschmolzenem metall
DE202004014151U1 (de) 2003-09-09 2005-03-03 Drache Umwelttechnik Gmbh & Co. Kg Vorrichtung zur Herstellung von Formteilen aus Aluminium- oder Magnesiumlegierungen, insbesondere zur Herstellung von Kraftfahrzeugteilen
DE202006002897U1 (de) 2006-02-21 2007-07-05 Haver & Boecker Ohg Eingusssieb

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2187971B (en) * 1986-03-17 1989-11-15 East London Mica Limited Filter device
GB9107223D0 (en) * 1991-04-05 1991-05-22 Foseco Holding Int Ltd Filters for light metals
US6289969B1 (en) * 1998-04-08 2001-09-18 Foseco International Limited Metal casting
US7011133B2 (en) * 2004-02-02 2006-03-14 Eckert C Edward Molten aluminum filtration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2848005A1 (de) 1977-11-25 1979-06-07 Alusuisse Verfahren und vorrichtung zum filtrieren von geschmolzenem metall
DE202004014151U1 (de) 2003-09-09 2005-03-03 Drache Umwelttechnik Gmbh & Co. Kg Vorrichtung zur Herstellung von Formteilen aus Aluminium- oder Magnesiumlegierungen, insbesondere zur Herstellung von Kraftfahrzeugteilen
DE202006002897U1 (de) 2006-02-21 2007-07-05 Haver & Boecker Ohg Eingusssieb

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020186280A1 (fr) 2019-03-19 2020-09-24 Fill Gesellschaft M.B.H. Dispositif de transport de métal fondu, ainsi que procédé de transport de métal fondu et un procédé de coulée de métal fondu

Also Published As

Publication number Publication date
AT508003A4 (de) 2010-10-15
EP2270248A3 (fr) 2018-01-17
AT508003B1 (de) 2010-10-15

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