TY - JOUR N2 - The study presents the results of the investigations of the effect of Cu, Ni, Cr, V, Mo and W alloy additions on the microstructure and mechanical properties of the AlSi7Mg0.3 alloy. The examinations were performed within a project the aim of which is to elaborate an experimental and industrial technology of producing elements of machines and devices complex in their construction, made of aluminium alloys by the method of precision investment casting. It was demonstrated that a proper combination of alloy additions causes the crystallization of complex intermetallic phases in the silumin, shortens the SDAS and improves the strength properties: Rm, Rp0.2,HB hardness. Elevating these properties reduces At, which, in consequence, lowers the quality index Q of the alloy of the obtained casts. Experimental casts were made in ceramic moulds preliminarily heated to 160 °C, into which the AlSi7Mg0.3 alloy with the additions was cast, followed by its cooling at ambient temperature. With the purpose of increasing the value of the quality index Q, it is recommended that the process of alloy cooling in the ceramic mould be intensified and/or a thermal treatment of the casts be performed (ageing)(T6). L1 - http://www.czasopisma.pan.pl/Content/101982/PDF/afe-2017-0025.pdf L2 - http://www.czasopisma.pan.pl/Content/101982 PY - 2017 IS - No 1 DO - 10.1515/afe-2017-0025 KW - Innovative materials and casting technologies KW - Precision investment casting KW - Aluminium alloys KW - Alloy additions KW - SDAS KW - Quality index A1 - Szymczak, T. A1 - Pacyniak, T. A1 - Pisarek, B.P. A1 - Rapiejko, C. PB - The Katowice Branch of the Polish Academy of Sciences VL - vol. 17 DA - 2017 T1 - Effect of Alloy Additions on the Structure and Mechanical Properties of the AlSi7Mg0.3 Alloy UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/101982 T2 - Archives of Foundry Engineering ER -