EP1657319B1 - Utilisation d'un alliage d'alluminium - Google Patents

Utilisation d'un alliage d'alluminium Download PDF

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Publication number
EP1657319B1
EP1657319B1 EP20050021924 EP05021924A EP1657319B1 EP 1657319 B1 EP1657319 B1 EP 1657319B1 EP 20050021924 EP20050021924 EP 20050021924 EP 05021924 A EP05021924 A EP 05021924A EP 1657319 B1 EP1657319 B1 EP 1657319B1
Authority
EP
European Patent Office
Prior art keywords
alloy
silver
content
use according
casting alloy
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.)
Expired - Fee Related
Application number
EP20050021924
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German (de)
English (en)
Other versions
EP1657319A1 (fr
Inventor
Ute Lohrey
Franz-Josef Dr. Klinkenberg
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1657319A1 publication Critical patent/EP1657319A1/fr
Application granted granted Critical
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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
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent

Definitions

  • the invention relates to the use of an aluminum casting alloy for sand and kokillerguss of engine core components.
  • Cast alloys from the Al-Si-Mg system in particular AlSi5-10Mg and AlSi5-10MgCu, are used in the automotive industry for sand casting and chill casting of cylinder heads and engine blocks.
  • the mechanical properties, in particular the yield strength of the castings leaves much to be desired.
  • silver-containing aluminum casting alloys are known, for example AlCu4TiMgAg, wherein the silver content is 0.4 to 1 wt .-%.
  • these alloys have extremely poor castability, especially unsatisfactory interdendritic power. This is reflected in their hot crack tendency, so that they are unsuitable for casting engine blocks and the like, since there even small cracks lead to component failure. As a result, they also contain no silicon, because this would increase the tendency of hot cracking.
  • the silver-containing aluminum casting alloy shows lower thermal conductivity over Al-Si-Mg (Cu) alloys. However, a low thermal conductivity leads to a high temperature in an engine block / cylinder head and is therefore equivalent to a reduced yield strength.
  • an aluminum casting alloy which contains 5 to 12% by weight of silicon, 0 to 0.8% by weight of magnesium and at least one additive from the group consisting of copper, silver, calcium, manganese, zinc and tin in an amount. which should correspond exactly to the solubility at the maximum operating temperature of the respective component.
  • EP 0 445 684 A1 shows an aluminum alloy, which, if it has according to the general formula given there manganese, iron, silicon and titanium, contains at least 15 wt .-% silver.
  • VASILAKOS, ET ET "Thermodynamic analysis and mechanical properties of cast aluminum alloy A357 with Cu, Ag, and Sm additions"
  • METAL HIDELBERG
  • 50 9), 556-560 CODES: MTLLAF
  • ISSN 0026-0746, 1996
  • XP009057849 describe an Al casting alloy comprising, by weight, 6.40% Si, 0.77% Mg, 0.7% Ag, 0.07% Fe, 0.145% Ti, 0.018% Zn, 1.142% Cu and 0.009% Ni.
  • As a comparison with the same alloy, which is not added Ag shows that the addition of silver, the yield strength is not, at least not significantly changed.
  • the object of the invention is to provide an aluminum casting alloy of good castability with improved mechanical properties, in particular improved yield strength for motor core components.
  • the magnesium content is preferably 0.25 to 0.50%, the iron content preferably max. 0.20%, the titanium content preferably max. 0.10%.
  • the manganese content is max. 2/3 of the iron content, preferably max. 0.05% and the zinc content preferably max. 0.05%, while the copper content is preferably 0.4-0.6%.
  • the iron content and / or titanium content of the alloy according to the invention is normally not less than 0.03 wt .-%.
  • the upper limit of the silver content is preferably for reasons of cost, preferably at most 1%.
  • the lower limit is 0.05%, but in practice the silver content is more than 0.10%.
  • the silver is added to a primary alloy in the appropriate amount.
  • AlSi7Mg or AlSi7MgCu0,5 can be used as the primary alloy.
  • the castings cast from the alloy are preferably subjected to solution annealing and quenching with water or optionally with air. Thereafter, aging takes place at about 150-200 ° C. for several hours. In addition to this heat treatment, post aging is performed for about 200 hours to simulate engine operation. In the downstream castings, a significant improvement in the yield strength is observed.
  • the casting alloy is particularly suitable for sand and chill casting, especially of engine core components, in particular the engine block, cylinder head, crankcase and the like cast components, especially in the automotive industry.
  • the castings were solution annealed for several hours, quenched with water, outsourced (T64 / T6 - heat treatment), additionally stored at about 250 ° C for about 200 hours and then cold drawn.
  • the results are of particular importance, because the post-aging of about 200 hours at 250 ° C is to be regarded as a simulation of the engine operation. That is, the addition of silver, the heat resistance of, for example, an engine block / cylinder head is substantially increased and thus reduced the thermal shock sensitivity accordingly.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Continuous Casting (AREA)

Claims (4)

  1. Utilisation d'un alliage de fonderie d'aluminium constitué de :
    5 % - 11 % en poids de silicium,
    0,1 % - 0,8 % en poids de magnésium,
    0,05 % - 5 % en poids d'argent,
    le cas échéant 0,2 % à 0,8 % en poids de cuivre,
    au maximum 0,30 % en poids de fer,
    au maximum 0,20 % en poids de titane,
    au maximum 2/3 de la teneur en fer de magnésium,
    au maximum 0,10 % en poids de zinc,
    ainsi que de l'aluminium en tant que reste,
    et d'autres impuretés indépendamment au maximum de 0,03 % en poids et au total 0,1 % en poids,
    pour le coulage en sable ou le coulage en coquille d'éléments de blocs moteur.
  2. Utilisation selon la revendication 1,
    caractérisée en ce que
    la teneur en agent de l'alliage est de 0,1 % à 1,0 % en poids.
  3. Utilisation selon l'une des revendications précédentes,
    caractérisée en ce que
    l'alliage consiste en un alliage primaire AlSi7MgCu0,5 auquel est ajouté un maximum de 1 % en poids d'argent.
  4. Utilisation selon l'une des revendications 1 à 3,
    caractérisée en ce que
    l'élément de bloc moteur est soumis à un recuit d'homogénéisation, à une trempe, et à une précipitation à chaud.
EP20050021924 2004-11-06 2005-10-07 Utilisation d'un alliage d'alluminium Expired - Fee Related EP1657319B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410053746 DE102004053746A1 (de) 2004-11-06 2004-11-06 Aluminium-Gusslegierung

Publications (2)

Publication Number Publication Date
EP1657319A1 EP1657319A1 (fr) 2006-05-17
EP1657319B1 true EP1657319B1 (fr) 2008-09-03

Family

ID=35355522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050021924 Expired - Fee Related EP1657319B1 (fr) 2004-11-06 2005-10-07 Utilisation d'un alliage d'alluminium

Country Status (2)

Country Link
EP (1) EP1657319B1 (fr)
DE (2) DE102004053746A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1882754B1 (fr) 2006-07-27 2016-07-13 Fagor, S.Coop. Alliage d'aluminium
EP1882753A1 (fr) * 2006-07-27 2008-01-30 Fagor, S.Coop. Alliage d'aluminium

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1255456B (de) * 1964-02-01 1967-11-30 Svenska Metallverken Ab Schweisszusatzwerkstoff zum korrosionsfesten Schmelzschweissen von Legierungen auf Aluminium-Basis, insbesondere AlZnMg-Legierungen
US3765877A (en) * 1972-11-24 1973-10-16 Olin Corp High strength aluminum base alloy
FR2557144A1 (fr) * 1983-12-22 1985-06-28 Fonderie Alcoa Mg Sa Alliage d'aluminium a proprietes ameliorees
JP2538692B2 (ja) * 1990-03-06 1996-09-25 ワイケイケイ株式会社 高力、耐熱性アルミニウム基合金
DE10026626C5 (de) * 1999-06-04 2006-10-05 Vaw Aluminium Ag Zylinderkopf- und Motorblockgußteil
AT3653U1 (de) * 1999-08-05 2000-06-26 Avl List Gmbh Aluminium-gusslegierung

Also Published As

Publication number Publication date
EP1657319A1 (fr) 2006-05-17
DE102004053746A1 (de) 2006-05-11
DE502005005249D1 (de) 2008-10-16

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