Substantiation of a manufacturing technology of flat rolled products from Al – Mg – Sc based alloys for the aerospace industry

The manufacturing technology of flat rolled products from Al – Mg – Sc based alloys with an optimal combination of mechanical properties has been developed. The work was carried out on 01570 alloy. The ingot was cast into an industrial slip mold and processed on industrial equipment of the Arkonik SMZ metallurgical plant, Samara. In this work, the homogenization regime and the interval of hot rolling temperatures have been specified, together with the recommendations on both hot and cold rolling modes. The hot rolling modes were developed considering the 01570 alloy rheological properties studied at temperatures of 350 and 400 оC and deformation rates corresponding to those normally used for commercial rolling (0.1, 1 and 40 s–1). The results are presented graphically and recorded in an analytical form using the Sellars formula. At each stage of production, the microstructure and mechanical properties of the semi-finished products were studied. It is shown that in the state of delivery of H116 (cold-deformed metal with a degree of deformation of 12%), the plasticity indices are in the same interval (9–14%) as for the less durable AMg6 alloy. Based on the values of the specific strength calculations, it is shown that the replacement of semifinished products from AMg6 alloy to 01570 alloy allows to reduce the product weight by 49.8–66%.

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