Influence of Temperature-Temporal Parameters of Annealing on Structure and Mechanical Properties of Alloy АМг6л with Enhanced Maintenance of Silicon

Abstract

In this paper we study the influence of temperature-temporal parameters of in-process annealing set on structure and mechanical properties of alloy АМг6л with 1 % of silicon admixtures. Melting is conducted in the laboratory resistance stove in graphite crucible. We use the following materials: aluminium А99, ligature Al–Mg, Al–Zr, Al Be, Al–Ti, Al–Si. The obtained standard samples 10 mm in diameter are annealed at different temperature-temporal parameters. Also, we determine their mechanical properties. We establish that alloy АМг6л can reach the maximum level of mechanical properties 1,0 % Si after annealing at the following mode – 430 °С, 20 h. + 530 °С , 8 h. The replacement of the standard annealing for the new mode for the alloy under study containing 1 % Si allows increasing the values of temporal break resistance by 12 %, and relative lengthening by 41 %. The new mode of annealing is instrumental in changing the phase morphology of Mg2Si from ramified one to a more compact. Also, grinding and spheroidizing of the particles take place. It influences the increase of level of mechanical properties of alloy АМг6л.