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EP2865772B1 - Alliage de fonderie d'aluminium - Google Patents

Alliage de fonderie d'aluminium Download PDF

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Publication number
EP2865772B1
EP2865772B1 EP13382421.9A EP13382421A EP2865772B1 EP 2865772 B1 EP2865772 B1 EP 2865772B1 EP 13382421 A EP13382421 A EP 13382421A EP 2865772 B1 EP2865772 B1 EP 2865772B1
Authority
EP
European Patent Office
Prior art keywords
weight
alloy
aluminium
max
aluminium casting
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.)
Active
Application number
EP13382421.9A
Other languages
German (de)
English (en)
Other versions
EP2865772A1 (fr
Inventor
Francisco Sáenz de Tejada Picornell
Iñigo Anza Ortiz de Apodaca
Iban Vicario Gómez
José Carlos García Alonso
Luis Maria Plaza
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.)
Befesa Aluminio SL
Original Assignee
Befesa Aluminio SL
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 Befesa Aluminio SL filed Critical Befesa Aluminio SL
Priority to ES13382421.9T priority Critical patent/ES2582527T3/es
Priority to EP13382421.9A priority patent/EP2865772B1/fr
Publication of EP2865772A1 publication Critical patent/EP2865772A1/fr
Application granted granted Critical
Publication of EP2865772B1 publication Critical patent/EP2865772B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium

Definitions

  • the field of the invention refers to aluminium casting alloys.
  • the present invention relates to a secondary aluminium alloy, useful to produce, by high pressure die casting, components which have to fulfill premium mechanical requirements in as-cast condition.
  • High pressure die castings have been traditionally limited to transport applications in which its structural functionality was of low responsibility, whereas the components with key structural responsibility have been traditionally manufactured with steel or aluminium alternative production processes, i.e, low pressure die casting (LPDC) or gravity die casting (GC).
  • LPDC low pressure die casting
  • GC gravity die casting
  • HPDC high pressure die casting
  • HPDC technological development vacuum casting, improved mold materials and thermal management, etc.
  • new alloys with new metallurgical and microstructural properties have been developed, which must present high fluidity to fill the whole mold conveniently, low die soldering, easy weldability, high machinability and above all, high elongation and mechanical properties.
  • Alloys of primary quality with a Fe/Mn ratio of 1 ⁇ 2 has been disclosed in the prior art, and decrease die soldering and reduce as much as possible the negative effect of Al 5 FeSi intermetallics on the elongation values.
  • Primary quality means mainly iron content below 0.15% by weight, copper content below 0.03% by weight and zinc content below 0.1% by weight, being those contents only achievable if aluminium is directly produced by smelting electrolysis from raw alumina. All refined aluminium produced from scraps, drosses and swarfs coming from post-processing operations and end of life products is hence limited to low mechanical responsibility applications what is a large limitation for the industry sustainability and aluminium recycling sector.
  • the casted component made of primary aluminium can be thermally treated if desired, in order to reach mechanical properties similar to those produced in alternative manufacturing processes as the LPDC or the GC.
  • Some other alloys of the AlMg family have been later developed to eliminate the thermal treatments, but always with a common characteristic, i.e. keeping very low percentages of impurity elements as iron, copper and zinc among others, only achievable by primary alloys.
  • DE19524564 discloses an aluminium-silicon alloy for casting cylinder heads comprising (in wt.%): 5-11 Si; 0.8-less than 2 Cu; 0.1-1.3 Mg; 0.1-0.8 Mn; max. 0.8 Fe; max. 1.3 Zn; max. 2 Ni; max. 0.5 Pb; max. 0.3 Sn; max. 0.25 Ti; max. 0.8 Zr; max. 0.8 Co; max. 0.8 Cr; max. 0.8 Mo; max. 0.8 W; and max. 0.8 Ag.
  • the alloy pref. contains 8-11 Si; 0.8-less than 2 Cu; 0.1-0.6 Mg; 0.1-0.5 Mn; max. 0.8 Fe; max. 1.2 Zn. max. 0.3 Ni; max. 0.2 Pb; max. 0.1 Sn. max. 0.2 Ti; and max. 0.05 other elements individually max. 0.15 in total.
  • the problem to be solved is the provision of a novel alloy of secondary quality produced for HPDC which can be used in as-cast condition and that presents the following values of elongation and mechanical properties: elongation (A) equal to or more than 4%, yield strength (Rp0.2) equal to or more than 120 MPa and ultimate tensile strength (Rm) equal to or more than 200 MPa.
  • elongation (A) equal to or more than 4%
  • yield strength Rp0.2
  • Rm ultimate tensile strength
  • Said values of elongation and mechanical properties are required for safety components when they are designed to support crash impacts (high energy absorption, i.e large deformation) or/and large static bending loads (high strength).
  • the alloys of the invention also maintains other processability properties as the alloy fluidity, low soldering to the die, easy welding or high machinability, among others.
  • a preferred embodiment of the present invention is an aluminium casting alloy, wherein said alloy consists of:
  • Silicon content has been restricted into a low range between 7-9% by weight to reduce as much as possible the eutectic fraction what helps to maximize the elongation but maintaining the fluidity at minimal values that allow an adequate mold filling.
  • Copper content has been restricted into a minimum at 0.7% by weight to guarantee a minimum elastic yield and ultimate tensile strength.
  • Iron content has been limited to 0.6-1% by weight to guarantee both low mold soldering and small volume fraction of Al 5 FeSi intermetallics, which at the same time are minimized by the manganese content.
  • Manganese content helps to transform the Al 5 FeSi intermetallics into alpha-Al 12 (Mn,Fe)Si 2 to reduce as much as possible the negative effect of those intermetallics. Values of manganese above 0.3% by weight were not found to be useful in terms of Al 5 FeSi intermetallics transformation.
  • Magnesium content helps to increase the yield strength, but always with a minimum percentage of copper and iron to avoid elongation to be affected. For small increases of magnesium percentages if enough silicon is available Mg 2 Si intermetallics can be produced.
  • Zinc content helps to achieve larger strength values at low magnesium contents taking advantage of its high solubility index, what means that even for contents above 2% of weight of zinc, larger yield strengths can be reached without affecting the elongation values since no matrix discontinuity appears.
  • a further embodiment of the invention is the aluminium casting alloy of the invention, wherein said alloy comprises 7-8% by weight of silicon.
  • a further embodiment of the invention is the aluminium casting alloy of the invention, wherein said alloy comprises 0.6-0.9% by weight of iron.
  • a further embodiment of the invention is the aluminium casting alloy of the invention, wherein said alloy comprises 0.7-1.3% by weight of copper.
  • a further embodiment of the invention is the aluminium casting alloy of the invention, wherein said alloy comprises 1-1.5% by weight of copper.
  • a further embodiment of the invention is the aluminium casting alloy of the invention, wherein said alloy comprises 0.05-0.3% by weight of manganese.
  • a further embodiment of the invention is the aluminium casting alloy of the invention, wherein said alloy comprises 2-3% by weight of zinc.
  • a further embodiment of the invention is the aluminium casting alloy of the invention, wherein said alloy comprises 0.05-0.1% by weight of magnesium.
  • Example 1 Aluminium casting alloys (prepararation, composition and mechanical properties)
  • Aluminium compositions have been prepared by melting a standard EN-AC 46500 alloy in a holding furnace at 690°C and later poured into the injection vessel, being injected into the mold cavity of a 950 tonnes closing force HPDC machine at 685°C. No vacuum conditions were applied.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Conductive Materials (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Claims (8)

  1. Alliage de fonderie d'aluminium, caractérisé en ce que ledit alliage est constitué de :
    7-9% en poids de silicium,
    0,6-1% en poids de fer,
    0,7-1,5% en poids de cuivre,
    0,05-0,5% en poids de manganèse,
    0,1-3% en poids de zinc,
    0,05-0,5% en poids de magnésium,
    0,01-0,15% en poids de titane,
    0,01-0,1% en poids de chrome,
    0,01-0,1% en poids de nickel,
    0,01-0,1% en poids de plomb,
    0,01-0,1% en poids d'étain
    et le reste est de l'aluminium.
  2. Alliage de fonderie d'aluminium selon la revendication 1, caractérisé en ce que ledit alliage est constitué de 7-8% en poids de silicium.
  3. Alliage de fonderie d'aluminium selon la revendication 1 ou la revendication 2, caractérisé en ce que ledit alliage est constitué de 0,6-0,9% en poids de fer.
  4. Alliage de fonderie d'aluminium selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit alliage est constitué de 0,7-1,3% en poids de cuivre.
  5. Alliage de fonderie d'aluminium selon l'une quelconque des revendications 1 à 4, caractérisé en ce que ledit alliage est constitué de 1-1,5% en poids de cuivre.
  6. Alliage de fonderie d'aluminium selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ledit alliage est constitué de 0,05-0,3% en poids de manganèse.
  7. Alliage de fonderie d'aluminium selon l'une quelconque des revendications 1 à 6, caractérisé en ce que ledit alliage est constitué de 2-3% en poids de zinc.
  8. Alliage de fonderie d'aluminium selon l'une quelconque des revendications 1 à 7, caractérisé en ce que ledit alliage est constitué de 0,05-0,1% en poids de magnésium.
EP13382421.9A 2013-10-23 2013-10-23 Alliage de fonderie d'aluminium Active EP2865772B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES13382421.9T ES2582527T3 (es) 2013-10-23 2013-10-23 Aleación de aluminio para fundición
EP13382421.9A EP2865772B1 (fr) 2013-10-23 2013-10-23 Alliage de fonderie d'aluminium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13382421.9A EP2865772B1 (fr) 2013-10-23 2013-10-23 Alliage de fonderie d'aluminium

Publications (2)

Publication Number Publication Date
EP2865772A1 EP2865772A1 (fr) 2015-04-29
EP2865772B1 true EP2865772B1 (fr) 2016-04-13

Family

ID=49517462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13382421.9A Active EP2865772B1 (fr) 2013-10-23 2013-10-23 Alliage de fonderie d'aluminium

Country Status (2)

Country Link
EP (1) EP2865772B1 (fr)
ES (1) ES2582527T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2753168T3 (es) * 2016-12-28 2020-04-07 Befesa Aluminio S L Aleación de aluminio para fundición
EP3342889B1 (fr) * 2016-12-28 2019-05-29 Befesa Aluminio, S.L. Alliage de fonderie d'aluminium
GB201713005D0 (en) 2017-08-14 2017-09-27 Univ Brunel The alloy and manufacturing method of Al-Si-Mg castings for improved mechanical performance
CN108330346A (zh) * 2018-01-15 2018-07-27 深圳市天合兴五金塑胶有限公司 新型高强度低热裂压铸铝合金复合材料

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2064590B2 (de) * 1970-12-30 1976-10-14 Honsel-Werke Ag, 5778 Meschede Verwendung von aluminium-legierungen als werkstoff zur herstellung von zylinderkoepfen fuer brennkraftmotoren
DE19524564A1 (de) * 1995-06-28 1997-01-02 Vaw Alucast Gmbh Aluminiumguß-Legierung
GB2332449B (en) * 1997-12-20 2002-05-22 Ae Goetze Automotive Ltd Aluminium alloy
US6908590B2 (en) * 2002-03-19 2005-06-21 Spx Corporation Aluminum alloy
US20050161128A1 (en) * 2002-03-19 2005-07-28 Dasgupta Rathindra Aluminum alloy
FR2841164B1 (fr) * 2002-06-25 2004-07-30 Pechiney Aluminium Piece moulee en alliage d'alluminium a haute resistance au fluage
EP1978120B1 (fr) * 2007-03-30 2012-06-06 Technische Universität Clausthal Alliage de fonte, d'aluminium et de silice et son procédé de fabrication
WO2013063488A2 (fr) * 2011-10-28 2013-05-02 Alcoa Inc. Alliage de moulage par coulée d'alsimgcu à haute performance

Also Published As

Publication number Publication date
EP2865772A1 (fr) 2015-04-29
ES2582527T3 (es) 2016-09-13

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