METHOD FOR PRODUCTION OF DEFORMED SEMI-FINISHED PRODUCTS OF ALUMINIUM-BASED ALLOY Russian patent published in 2016 - IPC C22C21/00 C22F1/04 B21B3/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly to deformable alloys based on aluminium system Al-Fe-Si in form of rolled sheets, foils, sheets, plates, extrusions, wire and others. From deformed semi-finished products can be obtained article to be used as packaging material food products, products used in construction as decorative finishing material, chemical industry for storage and transportation of different chemical substances, etc, method for production of deformed semi-finished products from aluminium alloy includes preparation of melt containing aluminium, iron and silicon ingot by melt crystallisation, production of deformed semi-finished products by deformation of ingot and annealing of deformed semi-finished products, wherein melt is prepared based on produced on technology of inert anode, with following ratio of components in molten, wt%: iron - 0.5-1.6, silicon - 0.25-0.4, aluminium - balance, at ratio of iron to silicon content of 2-4, melt crystallisation is performed at cooling rate not less than 20 K/s, deformation of ingot is performed at least in 2 stages with intermediate annealing between stages at 300-450 °C, at first stage with deformation degree of not less than 90 %, at next stage with deformation degree of not less than 60 %, annealing of the ready deformed semi-finished product is performed at 300-400 °C, wherein deformed semi-finished products with structure containing aluminium matrix with silicon content up to 0.1 wt% and uniformly distributed particles phase Al₈Fe₂Si with average size of not more than 1 mcm and weight ratio of 0.5 to 2 %.

EFFECT: technical effect consists in creation of new deformed alloy in form of thin-sheet rolled plate, foil and wire with high mechanical and electrical properties, particularly with time resistance after annealing, exceeding 130 MPa, electric conductivity of more than 60 % IACS, relative elongation exceeding 20 %.

5 cl, 4 dwg, 2 tbl, 3 ex