OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 27 No. 3 2025 Ta b l e 4 Chemical composition of mixing zones in the transition region when depositing 316L stainless steel on Inconel 625 Point Chemical element, wt.% Fe Ni Cr Ti Мо Nb Si Mn S Mode 1 1 51.74 23.78 20.09 0.54 1.44 0.79 0.78 0.54 0.31 2 47.39 26.05 19.71 0.51 3.36 1.43 0.85 0.7 – 3 19.11 46.48 21.12 0.17 7.88 3.64 1.02 0.6 – 4 0.7 61.09 22.37 – 10.26 4.44 0.74 0.34 – Mode 2 1 55.01 20.76 19.36 0.61 2.07 1.06 0.8 0.32 – 2 45.64 27.86 20.07 0.47 3.2 1.35 0.93 0.48 – 3 22.81 44.47 21.05 0.29 6.66 3.5 0.76 0.47 – 4 7.79 55.57 22.15 – 9.54 3.82 0.83 0.3 – Mode 3 1 43.8 29.34 20.31 0.5 2.81 1.35 0.82 0.51 – 2 38.89 31.86 20.1 0.42 4.76 2.35 0.96 0.67 – 3 14.44 50.49 21.76 0.17 7.34 3.65 0.95 0.66 0.53 4 8.57 55.79 21.17 0.11 9.14 3.83 0.84 0.56 – Fig. 11. Chromium and nickel equivalent ratios in different regions of the combined material. Solidification modes: AF, FA (austenite-ferrite); A (austenite) results in the A-mode solidification regime (Fig. 11, region 8). Region 9 corresponds to the chemical composition of the original 316L stainless steel. A sharp change in microhardness levels is observed across the gradient transition from steel to the nickel alloy (Fig. 14), which is typical for dissimilar material systems. At the same time, the differences in microhardness values between materials produced under different processing modes are relatively minor. It is worth noting that near the fusion boundary, the microhardness of 316L steel deposited onto the nickel alloy is slightly higher than that of the steel layers onto which the nickel alloy was deposited. The average
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