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Siberian federal university, Krasnoyarsk «RUSAL Bratsk Aluminum Smelter» JSC, Bratsk Research results of thermodeformation machining of flat ingots from experimental aluminium alloys, containing magnesium, scandium, rare-earth and transition metals have been represented. Relevance of the work aimed at creating new alloys system Al-Mg, alloyed by scandium, and technologies for obtaining deformed semi-finished products from them using metal forming operations have been shown. Regimes of hot and cold sheet rolling for obtaining strips with thickness 1-3 mm from these alloys were calculated and experimentally tested. Experimental research included the following steps: preparation of flat slabs with dimensions 28×150×300 mm for rolling; hot rolling with temperature 450 C with total draw ratio about 6; cold rolling with total draw ratio about 5; annealing of cold-deformed semi-finished products at temperature 350 C within 3 hours; argon-arc welding of the obtained strips along and across the direction of deformation; Intergranular corrosion test; Evaluation of mechanical properties of the samples. As a result of research nature and degree of corrosion destruction have been studied and Mechanical properties of deformed, annealed and welded semi-finished products from experimental alloys have been determined. It is established that they have a high level of strength and plastic properties of the metal along, across and at an angle 45° relative to the direction of rolling. So tensile strength reaches value 500-520 MPa for deformed samples, yield strength of metal 435470 MPa, relative elongation 4,8-6,7 %, and for annealed samples the values of the relative elongation increase and can reach 14-14,5 % At sufficiently high yield strength 357-369 MPa. Tests for intergranular corrosion of samples after welding showed high corrosion resistance of welded joints, The strength of the welded seam is 0,75-0,85 of the strength of the base metal. The results of research can be recommended for the development of technology for the manufacture of parts from flat products, which including welded joints.

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Research of rolling regimes and mechanical properties of cold-rolled, annealed and welded semi-finished products from experimental alloys of Al – Mg system, economically alloyed by scandium