PART FROM HIGH-STRENGTH COMPOSITE MODIFIED ALUMINIUM ALLOY AND METHOD OF ITS PRODUCTION Russian patent published in 2024 - IPC C22C1/03 C22C1/06 C22C21/00 C22F1/04 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to production of parts from high-strength composite aluminium alloy. Method for producing a part from a modified aluminium alloy comprises steps S1–S5. At step S1 and S2, molten aluminium alloy and modifier are provided, respectively. Content of modifier is 0.4–0.6 wt.% of the total amount of the modified aluminium alloy. Modifier is a combination of an aluminium alloy containing a rare-earth metal and an aluminium-titanium master alloy or an aluminium alloy containing a rare-earth metal and an aluminium-titanium-boron master alloy, wherein the aluminium alloy containing the rare-earth metal contains strontium, titanium or titanium and boron, wherein the weight ratio of the total amount of the rare-earth metal : strontium : titanium or titanium and boron is 1:(0.1–1.2):(0.1–1.2), rare-earth metal in aluminium alloy containing rare-earth metal is one or more metals selected from lanthanum, cerium and yttrium. Production of an aluminium alloy containing a rare-earth metal includes a step S211 to provide an aluminium melt, step S212 to provide an aluminium-strontium master alloy, aluminium-titanium master alloy or aluminium-titanium-boron master alloy and master alloy of rare-earth metal-aluminium, step S213, at which in an atmosphere of inert gas to the aluminium melt successively adding a master alloy of rare-earth metal-aluminium, an aluminium-strontium master alloy, an aluminium-titanium or aluminium-titanium-boron master alloy for melting to obtain an aluminium alloy containing a rare-earth metal. At step S3, a modifier is added to the molten aluminium alloy in an inert gas atmosphere and the modified aluminium alloy is melted. At steps S4 and S5, the modified aluminium alloy is cast and heat treated.

EFFECT: high strength of parts.

7 cl, 2 dwg, 3 tbl, 3 ex