Kimstach T. Research and elaboration of tin-aluminum bronze with developed casting, tribotechnical and corrosion properties

Cu-Sn-Al copper angle alloys processes of structure formation during phase transformations according to eutectic-peritectic crystallization character. State diagram Cu–Sn–Al copper corner alloys in non-monotectic concentration interval structure formation regularities in order to their mechanical, casting, antifriction and corrosion properties improving. Standard methods and generally accepted methodology, including: optical metallography, scanning electron microscopic, X-ray spectral microanalysis, differential thermogravimetric, energy dispersive spectral, X-ray structural phase analyses; bronzes mechanical and technological properties determination and experimental data statistical processing. Cu-Sn-Al system copper angle alloys with Sn content up to 7% (wt.) and Al up to 11% (wt.) eutectic-peritectic character of structure formation has been established. Existence of single-phase structural state concentration interval ideas about regularity of shifting up to 3 % (wt.) Sn in Cu-Sn-Al system copper corner with Al content up to 7.4 % (wt.) and Sn 1...6 % (wt.) due to chemical compound Cu5Sn formation has been developed. Sn and Al with their content up to 6% (wt.) each complex influence in Cu-Sn-Al system bronze chemical composition and impurity elements (Fe, Si, Pb, Zn) up to 0.6% (wt. ) each on bronze structure and mechanical properties level regularities have been established. Dependences between cast bronze BrO3A3, developed in work, mechanical properties indicators and main components with optimized composition of 3...4% (wt.) Sn and Al each have been established. This makes it possible to predict BrO3A3 bronze mechanical properties depending on its chemical composition, which will ensure cast parts production with operational properties at required level. Metallurgy: metal science and heat treatment of metals. Implemented.