| 摘要 |
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 AlZr with the size no more than 20 nm, and manganese mainly forms secondary phase separations AlCuMnwith 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 |
