Improved mechanical properties secondary alloys ak7ч and a356.2

Optimization of technology processing of the secondary aluminum cast-alloys AK7ч and A356.2. Study of the effect of an inoculation treatment on the structure and properties of alloys containing different concentrations of impurities. Methodology. As a material for this study of the alloy AK7ч and its analogue A356.2 and the returns of its own production was chosen. The alloys from different composition of the initial charge was carried out according to the factory and experimental technology. Control of mechanical properties was performed on samples prepared in accordance with GOST 1497-84 after heat treatment at T6 mode. Control of the microstructure was performed on microsection after treatment surface by aquatic solution of acid 0,5 % HF + 0,5 % HNO3 + 1,5 % HCl during 10s. Findings. The ability to improve on the mechanical properties of secondary aluminum alloys modifying treatment has been shown. Originality. Influence of the amount of modifying complex on the structure and properties of secondary aluminum alloy AK7ч has been show. Practical value. Recommendations on the use of modifying complex MK-1 for processing secondary AK7ч and A356.2 alloys was offered.