High-strength aluminium-based alloy
The invention relates to the metallurgy field, in particular to the production of aluminium-based cast materials, and can be used for producing crucial components under high-load conditions. The primary application is for components used in automotive engineering, sports equipment, etc. Proposed is an aluminium-based high-strength alloy, containing zinc, magnesium, calcium, metal, titan, and at least one element from the group consisting of silicon, cerium, nickel, zirconium and scandium, using defined concentrations of the constituents. The technical result of the invention is increased strength properties of the alloy and the products made therefrom on account of the formation of secondary precipitates of a strengthening phase by means of dispersion hardening.
1. A high-strength aluminum-based alloy containing zinc, magnesium, calcium, iron, titanium, and at least one element from the group consisting of silicon, cerium and nickel, zirconium and scandium, with the following concentrations of components in the alloy, wt. %:
Zinc (Zn): 5-8;
Magnesium (Mg): 1.5-2.1;
Calcium (Ca): 0.10-1.9;
Iron (Fe): 0.08-0.5;
Titanium (Ti): 0.01-0.15;
Silicon (Si): 0.08-0.9;
Nickel (Ni): 0.2-0.4;
Cerium (Ce): 0.2-0.4;
Zirconium (Zr): 0.08-0.15;
Scandium (Sc): 0.08-0.15;
Aluminum (Al): the remainder;
with the zinc content being at least 4 wt. % in the aluminum solution and in secondary separations.
2. The alloy of claim 1 , characterized in that calcium is present in the alloy structure in the form of eutectic components with zinc and iron, having a particle size of no more than 3 μm.
3. The alloy of claim 1 , characterized in that calcium is present in the alloy structure in the form of eutectic components with zinc, iron and silicon, having a particle size of no more than 3 μm.
4. The alloy of claim 1 , characterized in that calcium is present in the alloy structure in the form of eutectic components with zinc, iron and nickel, having a particle size of no more than 3 μm.
5. The alloy of claim 1 , characterized in that calcium is present in the alloy structure in the form of eutectic components with zinc, iron and cerium, having a particle size of no more than 3 μm.
6. The alloy of claim 1 , characterized in that zinc is present in the aluminum solution at a concentration of at least 5 wt. %.
7. The alloy of any of claims 1 - 6 , characterized in that the ratio of Ca/Fe is >1.1.
8. The alloy of any of claims 1 - 6 , characterized in that the ratio of Ce/Fe is >1.1.
9. The alloy of any of claims 1 - 6 , characterized in that the sum of Ti+Zr+Sc does not exceed 0.25 wt. %.
10. The alloy of claim 1 , characterized in that the alloy is produced in the form of castings by low-pressure casting.
11. The alloy of claim 1 , characterized in that the alloy is produced in the form of castings by gravity casting.
12. The alloy of claim 1 , characterized in that the alloy is produced in the form of castings by piezocrystallization casting.
13. The alloy of claim 1 , characterized in that the alloy is produced in the form of castings by high-pressure casting.
14. The alloy of claim 1 , characterized in that the alloy contains aluminum produced by electrolysis using an inert anode.
15. The alloy of claim 1 , characterized in that zirconium and scandium are substantially in the form of secondary separations having a size of up to 20 nm and a L1 2 lattice.
16. The alloy of claim 1 , characterized in that the structure of the aluminum alloy is an aluminum solution hardened by secondary separations of metastable strengthening phases and a eutectic component containing calcium, nickel, and one element from the group consisting of silicon, cerium and nickel, with zinc and magnesium required to form secondary separations of the strengthening phases due to dispersion hardening, calcium, iron, silicon, cerium, and nickel being eutectics forming elements and required to form a eutectic component in the structure, imparting high casting performance, and titanium required to modify the solid aluminum solution.