OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 25 No. 1 2023 Fig. 18. Cross-sectional area of the wear tracks for specimens printed from bronze С65500 and with the addition of aluminum filament. Printing modes 1 (1), 2 (2) and 3 (3). Samples after annealing (4), deformation and subsequent annealing (5). Samples with the addition of 10 wt.% Al (6), 10 wt.% Al–5Si (7) and 10 wt.% Al–12Si (8) Conclusions The paper presents the results of experimental studies of silicon bronze C65500, printed using the technology of electron beam additive manufacturing. Based on the results obtained, the effect of printing conditions and the addition of aluminum filament on the structure, mechanical properties, as well as its relationship with the corrosion resistance and wear resistance of the specimens were established. 1. According to the studies performed, the addition of 10 wt.% aluminum filament leads to the formation of a two-phase structure in printed specimens. In this case, the main phase is the α-Cu solid solution with secondary HCP γ-phase precipitates. The formation of the two-phase structure contributes to improving the strength by ~1.2–1.9 times and microhardness by ~1.4–2.2 times, as well as impairing the ductility by 1.1–5.4 times compared with single-phase specimens. 3. As a result of the study of corrosion resistance, it is shown that corrosion proceeds without the formation of pitting on the surfaces of silicon bronze and bronzes printed with the addition of aluminum filament. 4. High-temperature annealing, as well as plastic deformation by compression followed by annealing, contributed to a reduction in mass loss by 15–30% for specimens printed from silicon bronze. 5. The addition of aluminum filament made it possible to further reduce the weight loss of printed specimens by 13–31%, relative to specimens printed from bronze C65500. 6. The use of deformation followed by annealing makes it possible to reduce wear by 15–30% for specimens printed from bronze C65500. This is ensured by a fine structure, which more effectively resists plastic deformation due to the presence of a large number of grain boundaries. 7. The addition of 10 wt.% alloy Al-5Si in the process of printing bronze contributed to an increase in the wear resistance of the material by 25%, compared with specimens from bronze C65500. The results obtained can be used in the development of technologies for the additive production of products from silicon bronzes.
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