PSI - Issue 81

Anatolii Babinets et al. / Procedia Structural Integrity 81 (2026) 353–359

359

4. Conclusions Based on the conducted studies, the following conclusions can be drawn: 1. It has been established that the introduction of B ₄ C additive, providing a boron content in deposited metal of the 50Cr2Ni2MoVSi type at the level of 0.01%, is optimal for obtaining defect-free deposited metal of this type. Boron concentrations above 0.02% lead to the formation of crystallization cracks. 2. Experimental results showed that using a fine-dispersed (50 –100 µm) granulometric composition of the MPW core, compared to the standard composition (50 –300 µm), significantly increases the stability of the arc deposition process. This is manifested by a 30% reduction in current and voltage variation coefficients and, consequently, promotes the formation of a more homogeneous, defect-free structure. 3. It was demonstrated that the combination of B ₄ C modifying additives at 0.01% and the use of fine powder fraction (50 – 100 µm) has a synergistic effect, providing the most significant refinement of the macrostructure (reducing crystallite width by 2.5 times) and increasing microhardness and hardness by 10 – 12% compared to the reference specimen. 4. Experimental evidence showed that the proposed comprehensive approach significantly improves the performance properties of deposited metal: heat resistance and wear resistance under high-temperature friction, according to the “metal–metal” scheme , increase by 15 – 20%. References Adeeva, L.I., Tunik, A.Y., Korzhyk, V.M., Strohonov, D.V., Kostin, V.A., Konoreva, O.V., 2025. Peculiarities of the microstructure and properties of iron aluminide powders obtained by the method of plasma-arc spheroidization. Materials Science 60 (4), 424 – 434. https://doi.org/10.1007/s11003-025-00902-1 Babinets, A.A., 2024. 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