HEAT-RESISTANT CASTING AND WROUGHT ALUMINIUM ALLOYS BASED ON Al-Zn-Mg-Cu-Zr-Cr-Y(Er) SYSTEM (VERSIONS) Russian patent published in 2025 - IPC C22C21/06 C22C21/10 C22C21/12 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, mainly to heat-resistant casting and wrought aluminium alloys, hardened by thermal and deformation treatment. Disclosed are versions of heat-resistant cast or wrought aluminium alloy. Heat-resistant cast or wrought aluminium alloy contains, wt.%: zinc 2.5-3.5, magnesium 2.5-3.5, copper 2.5-3.5, chrome 0.15-0.2, zirconium 0.15-0.2, titanium 0.1-0.15, yttrium 0.5-0.7 or erbium 1.2-1.6, iron up to 0.15, silicon up to 0.15, aluminium – balance, wherein copper-to-yttrium ratio in alloy makes 5.0 or that of copper-to-erbium makes 2.1-2.2, while zinc-to-magnesium ratio makes 1. Alloy structure contains solid solution and intermetallic particles Al₈Cu₄Y and AlTiYCr or Al₈Cu₄Er and Al₃Er.

EFFECT: alloy is characterized by high level of casting properties, high level of strength at room and high temperatures.

2 cl, 12 dwg, 6 tbl, 6 ex