Cast Aluminium Alloy

a technology of aluminium alloy and cast aluminium, which is applied in the field of cast aluminium alloy, can solve the problems of distortion and inability to meet thermal stresses, and achieve the effect of increasing stability and high stability

Inactive Publication Date: 2007-10-18
EADS DEUT GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] Also, from International Patent Document WO A-96/10099, aluminium alloys containing scandium are known for increasing the stability. The high stability is a result of an artificial aging after a solution heat treatmen

Problems solved by technology

These alloys are not suitable for thermal stresses of up to 400° C. The classical cast aluminium alloys are thermally stable only up to approximately 200° C.
It is a disadvantag

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0043] From three different alloys, sample rods for determining the mechanical characteristics were cast by means of the permanent Diez rod mold. In addition to scandium and titanium, the first alloy also contains zirconium. The second alloy has a higher scandium content than the first alloy but contains no zirconium. The third alloy is a variant with a higher magnesium and silicon content.

[0044] In addition, a fourth alloy, which also contains copper, was produced by means of diecasting. This alloy was obtained by melting in a 200 kg electrically heated crucible furnace. The casting temperature was 700° C. The casting took place on a 400 t (tension holding force) diecasting machine. A plate of the measurements 220×60×3 mm was used as the sample shape. Sample rods for tension tests were taken from the plates. The sample rods were machined only on the narrow sides.

[0045] A reference alloy (alloy 5) containing neither scandium nor zirconium was used for comparison purposes. This all...

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Abstract

Cast aluminium alloys comprising 1.0-8.0% in weight magnesium (Mg), >1.0-4.0% in weight silicon (Si), 0.01-<0.5% in weight scandium (Sc), 0.005-0.2% in weight titanium (Ti), 0-0.5% in weight of at least one element or selected from the group consisting of zirconium (Zr), hafnium (Hf), molybdenum (Mo), terbium (Tb), niobium (Nb), gadolinium (Gd), erbium (Er) and vanadium (V), 0-0.8% in weight manganese (Mn), 0-0.3% in weight chromium (Cr), 0-1.0% in weight copper (Cu), 0-0.1% in weight zinc (Zn), 0-0.6% in weight iron (Fe), 0-0.004% in weight beryllium (Be), and the remainder of aluminium with further impurities to an individual maximum of 0.1% in weight and totally maximally 0.5% in weight.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a 371(c) National Stage of PCT / DE2004 / 002425 filed Nov. 3, 2004, which claims priority to Germany patent application Serial No. 103 52 932.2 filed Nov. 11, 2003, the disclosures of which are incorporated herein in their entireties.FIELD OF THE INVENTION [0002] The present invention relates to a cast aluminium alloy suitable particularly for thermally highly stressed cast parts. By using the cast aluminium alloy according to the invention, the efficiency of cast parts produced therefrom is improved considerably, their thermal stability being guaranteed up to temperatures of 400° C. BACKGROUND OF THE INVENTION [0003] By means of modern casting methods, such as the diecasting method, the sand casting method, the permanent-mold casting method or the thixocasting and rheocasting method, which are very far developed technically, highly stressable cast parts can currently be produced from aluminium alloys. [0004] By means o...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C21/02C22F1/047
CPCC22F1/047C22C21/08
Inventor KOCH, HUBERTLENCZOWSKI, BLANKA
Owner EADS DEUT GMBH
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