OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 25 No. 1 2023 Ta b l e 3 The elemental composition of the diffusion layer on Steel U10 (1.0% C) after 4 hours of borocoppering (Fig. 7. b) Points of the spectrum Chemical elements, mass % B C Al Si Cr Mn Ni Fe Cu 1 14.81 0.83 0.22 0.16 0.34 0.57 – 81.18 1.89 2 12.73 0.43 0.19 0.17 0.15 0.08 – 85.68 0.57 3 6.91 0.61 0.06 0.11 0.09 0.55 – 83.34 – 4 0.68 1.22 – 0.34 0.23 0.32 0.11 95.91 1.19 5 – 1.69 – 0.28 0.12 0.3 – 97.61 – b c Fig. 7. The points of the spectra counting in the diffusion layer on the sample during elemental analysis: a – Steel 45 (0.45% C); b – Steel U10 (1.0% C); c – 0.5C-Cr-Ni-Mn steel after 4 hours of borocoppering a The X-ray obtained on Steel U10 (1.0% C) (see Fig. 9) demonstrates the presence of the Fe2B phase and the Fe3C carbide phases. It is worth paying attention to the absence of the FeB phase. The presence of copper is also not observed. As a result of X-ray phase analysis of a 0.5C-Cr-Ni-Mn steel specimen (see Fig. 10) the phase composition of the boride layer was established, which consists of three borides: FeB, Fe2B and Cr5B3. It should be noted
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