ALUMINIUM BASED HEAT RESISTANT ALLOY AND METHOD OF OBTAINING FROM IT OF DEFORMED SEMI-FINISHED PRODUCTS Russian patent published in 2014 - IPC C22C21/12 C22F1/57 C22C1/02 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely, to deformable aluminium-based alloys, and can be used for obtaining of products operating in a temperature range up to 350°C. The alloy contains, by wt %: The alloy contains, by wt %: 0.6-1.5 Cu; 1.2-1.8 Mn; 0.2-0.6 Zr; 0.05-0.25 Si; 0.1-0.4 Fe; 0.01-0.3 Cr; the rest is Al, meanwhile the alloy contains zirconium in the structure as nano-particles of the phase Al₃Zr with the size no more than 20 nm, and manganese mainly forms secondary phase separations Al₂₀Cu₂Mn₃ with the size no more than 500 nm with amount not less than 2%. The method of obtaining of deformed semi-finished product from the named alloy includes preparation of melt and obtaining of casting block by melt crystallisation at the temperature, at least 50°C higher than liquidus temperature, deforming of the casting block in two stages with a process annealing at 340-450°C, at the temperature not higher than 350°C, with obtaining of the intermediate deformed semi-finished product, anneal of the obtained semi-finished product at the temperature 340-450°C and its deforming at room temperature until obtaining of the ready deformed semi-finished product and anneal of the ready deformed semi-finished product at the temperature 300-400°C.

EFFECT: improvement of strength, thermostability and conductivity of aluminium-based alloy, and also deformed semi-finished products like sheets, bars, wire, press formings, pipes made from it.

7 cl, 6 ex, 8 tbl 3 dwg