EP0676479A1 - Alliages d'aluminium contenant du bismuth, du cadmium, de l'indium et/ou du plomb à l'état très finement dispersé et procédé d'obtention - Google Patents

Alliages d'aluminium contenant du bismuth, du cadmium, de l'indium et/ou du plomb à l'état très finement dispersé et procédé d'obtention Download PDF

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Publication number
EP0676479A1
EP0676479A1 EP95420087A EP95420087A EP0676479A1 EP 0676479 A1 EP0676479 A1 EP 0676479A1 EP 95420087 A EP95420087 A EP 95420087A EP 95420087 A EP95420087 A EP 95420087A EP 0676479 A1 EP0676479 A1 EP 0676479A1
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EP
European Patent Office
Prior art keywords
lead
aluminum
metal
finely dispersed
metals
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.)
Ceased
Application number
EP95420087A
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German (de)
English (en)
French (fr)
Inventor
Michel Leroy
Marc Marticou
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.)
Rio Tinto France SAS
Original Assignee
Aluminium Pechiney SA
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 Aluminium Pechiney SA filed Critical Aluminium Pechiney SA
Publication of EP0676479A1 publication Critical patent/EP0676479A1/fr
Ceased 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
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting

Definitions

  • the invention relates to aluminum alloys containing in the very finely dispersed state metals having very low solubility in solid aluminum such as Bi, Cd, In and / or Pb as well as their solidification process.
  • these commercially available master alloys are obtained by natural solidification in molds of the molten master alloy, so as to obtain molded parts which can be used for correcting the desired composition.
  • These molded parts are most often presented in the form of molded plates with a thickness of a few centimeters, possibly separable, or ingots of a few hundred grams.
  • the problem to be solved was therefore to develop master alloys containing Bismuth, Cadmium, Indium and / or Lead in which these dense elements and poorly soluble in aluminum would be very finely dispersed in the matrix of Aluminum, and very homogeneously throughout the volume.
  • Aluminum poor in addition metals solidifies first, by "rejecting" a liquid very enriched in dense addition metals, which therefore tends to gather in large heterogeneous globules under the effect of surface tension forces. and gravity.
  • the invention nevertheless proposes new aluminum master alloys containing, in addition, heavy metals in quantities greater than the maximum solubility of these metals in aluminum and very finely dispersed to have a high speed of dissolution and a high dissolution yield. in liquid aluminum alloys.
  • an aluminum alloy containing at least one metal belonging to the group formed by Bismuth, Cadmium, Indium and Lead in an amount greater than the maximum solubility of these metals in solid aluminum, characterized in that more than 80% by weight of these addition metals are finely dispersed in the solid aluminum matrix in the form of globules or crystals of size less than 5 micrometers.
  • the applicant conventionally produced a molten aluminum alloy containing 0.20% of Lead, by melting 50 kg of refined aluminum and 100 g of lead, in an electric furnace with a graphite crucible .
  • the alloy thus melted was homogenized by stirring the liquid using a graphite rotor.
  • a first part of the molten alloy was poured into small ingots of diameter 50 mm and height about 50 mm, with a unit weight of about 250 g, in small crucibles made of aluminous refractories. 100 ingots were thus produced.
  • the rest of the molten alloy was poured into a billet with a diameter of 100 mm and a length of about 1,150 mm, in a vertical continuous casting installation, the molding ring of which had been surrounded by a turn coaxial with this ring, traversed by an alternating current of low frequency ( ⁇ 100 Hertz) according to French patents FR 2530510 and FR 2530511.
  • the object of this turn traversed by an alternating current was to cause a magneto-hydrodynamic mixing of the liquid metal during solidification, so as to maintain as complete a homogeneity as possible in the composition of this metal until complete solidification.
  • This billet was then cut with a band saw into slices approximately 15 mm thick. There were thus obtained 70 slices of average unit weight approximately 320 grams.
  • FIG. 2b An example of the micrographs obtained, after polishing and anodic oxidation of the billet slices, is given in FIG. 2b.
  • the small lead globules are distributed very homogeneously inside the aluminum grains, at the junction of the dendritic solidification cells which have constituted these grains.
  • the balance sheet of the 8 castings carried out is established overall as follows: Weight of molten aluminum 95.530 kg Initial lead content of this aluminum 0.175 ppm Weight of slices loaded 17.22 kg Aluminum lead content 0.473 ppm Yield of recovery of the lead brought by the slices of billets: 28.66 g recovered for 34.40 g introduced via the slices, ie an average yield of 83%.
  • the master alloy according to the invention therefore has a very clear advantage over the master alloys according to the prior art.
  • a particular mode of obtaining such a master alloy with more than 80% by weight of the finely dispersed lead in the form of globules or crystals of size less than 5 ⁇ m and more than 50% by weight of the lead is finely dispersed under
  • the shape of globules or crystals of size less than 1 ⁇ m has been described, which consists of an electromagnetic agitation of the liquid being solidified during a continuous vertical casting of the metal.
  • molten alloys were produced comprising 0.15% by weight of lead, 0.50% by weight of Bismuth, 1% by weight of Cadmium and 1% by weight of Indium respectively. These contents are all higher than the maximum solubility of these metals in solid aluminum and lower than the monotectic content beyond which appears a phenomenon of demixion in liquid phase, even before any beginning of solidification.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP95420087A 1994-04-11 1995-04-07 Alliages d'aluminium contenant du bismuth, du cadmium, de l'indium et/ou du plomb à l'état très finement dispersé et procédé d'obtention Ceased EP0676479A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404569 1994-04-11
FR9404569A FR2718462B1 (fr) 1994-04-11 1994-04-11 Alliages d'aluminium contenant du bismuth, du cadmium, de l'indium et/ou du plomb à l'état très finement dispersé et procédé d'obtention .

Publications (1)

Publication Number Publication Date
EP0676479A1 true EP0676479A1 (fr) 1995-10-11

Family

ID=9462184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95420087A Ceased EP0676479A1 (fr) 1994-04-11 1995-04-07 Alliages d'aluminium contenant du bismuth, du cadmium, de l'indium et/ou du plomb à l'état très finement dispersé et procédé d'obtention

Country Status (6)

Country Link
US (1) US5585067A (no)
EP (1) EP0676479A1 (no)
CN (1) CN1117086A (no)
FR (1) FR2718462B1 (no)
NO (1) NO951189L (no)
RU (1) RU95105422A (no)

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* Cited by examiner, † Cited by third party
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JP3421535B2 (ja) * 1997-04-28 2003-06-30 トヨタ自動車株式会社 金属基複合材料の製造方法
IL123503A (en) * 1998-03-01 2001-01-11 Elecmatec Electro Magnetic Tec Aluminum-bismuth bearing alloy and methods for its continuous casting
US6845809B1 (en) 1999-02-17 2005-01-25 Aemp Corporation Apparatus for and method of producing on-demand semi-solid material for castings
US6402367B1 (en) 2000-06-01 2002-06-11 Aemp Corporation Method and apparatus for magnetically stirring a thixotropic metal slurry
US6432160B1 (en) 2000-06-01 2002-08-13 Aemp Corporation Method and apparatus for making a thixotropic metal slurry
US6796362B2 (en) 2000-06-01 2004-09-28 Brunswick Corporation Apparatus for producing a metallic slurry material for use in semi-solid forming of shaped parts
US6399017B1 (en) 2000-06-01 2002-06-04 Aemp Corporation Method and apparatus for containing and ejecting a thixotropic metal slurry
US6611736B1 (en) 2000-07-01 2003-08-26 Aemp Corporation Equal order method for fluid flow simulation
US7024342B1 (en) 2000-07-01 2006-04-04 Mercury Marine Thermal flow simulation for casting/molding processes
US6742567B2 (en) * 2001-08-17 2004-06-01 Brunswick Corporation Apparatus for and method of producing slurry material without stirring for application in semi-solid forming
US7816250B2 (en) * 2006-09-29 2010-10-19 Intel Corporation Composite solder TIM for electronic package
US7846554B2 (en) * 2007-04-11 2010-12-07 Alcoa Inc. Functionally graded metal matrix composite sheet
US8403027B2 (en) * 2007-04-11 2013-03-26 Alcoa Inc. Strip casting of immiscible metals
US8956472B2 (en) 2008-11-07 2015-02-17 Alcoa Inc. Corrosion resistant aluminum alloys having high amounts of magnesium and methods of making the same
CN115679169A (zh) * 2022-10-17 2023-02-03 广州和信实业有限责任公司 汽车发动机支架用高强度铝合金压铸件及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211401B (de) * 1965-03-11 1966-02-24 Vaw Ver Aluminium Werke Ag Verfahren zum Schmelzen von Aluminium oder dessen Legierungen und zur Herstellung von Aluminiumlegierungen
GB1127192A (en) * 1966-01-05 1968-09-11 Glacier Co Ltd Improvements in or relating to bearing material
FR2085436A1 (en) * 1970-04-21 1971-12-24 Alsacienne Atom Multi-chamber furnace installation for melting, refining - and casting metals
FR2101000A1 (no) * 1970-08-04 1972-03-31 Alsacienne Atom
FR2189527A1 (no) * 1972-06-21 1974-01-25 Alcan Res & Dev
FR2242477A1 (en) * 1973-09-04 1975-03-28 Stern Lionel Prodn of aluminium ingot with continuous lead network - - from aluminium ingot with continuous tin network

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809379A (en) * 1970-04-21 1974-05-07 Alsacienne Atom Installation for the treatment and movement of liquid metals
FR2530511B1 (fr) * 1982-07-23 1985-07-05 Cegedur Procede de coulee de metaux dans lequel on fait agir des champs magnetiques

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211401B (de) * 1965-03-11 1966-02-24 Vaw Ver Aluminium Werke Ag Verfahren zum Schmelzen von Aluminium oder dessen Legierungen und zur Herstellung von Aluminiumlegierungen
GB1127192A (en) * 1966-01-05 1968-09-11 Glacier Co Ltd Improvements in or relating to bearing material
FR2085436A1 (en) * 1970-04-21 1971-12-24 Alsacienne Atom Multi-chamber furnace installation for melting, refining - and casting metals
FR2101000A1 (no) * 1970-08-04 1972-03-31 Alsacienne Atom
FR2189527A1 (no) * 1972-06-21 1974-01-25 Alcan Res & Dev
FR2242477A1 (en) * 1973-09-04 1975-03-28 Stern Lionel Prodn of aluminium ingot with continuous lead network - - from aluminium ingot with continuous tin network

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VIVÈS: "Transfert et brassage des métaux fondus par de nouveaux procédés électromagnétiques", MÉM.ET.SCI.REV.MÉT., vol. 82, no. 12, December 1985 (1985-12-01), PARIS, pages 643 - 656 *

Also Published As

Publication number Publication date
RU95105422A (ru) 1997-04-10
CN1117086A (zh) 1996-02-21
FR2718462B1 (fr) 1996-05-24
NO951189D0 (no) 1995-03-28
US5585067A (en) 1996-12-17
FR2718462A1 (fr) 1995-10-13
NO951189L (no) 1995-10-12

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