OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 25 No. 1 2023 Fig. 9. XRD pattern of the specimen of Steel U10 (1.0% C) after borocoppering for 4 hours Fig. 10. XRD pattern of the sample made of 0.5C-Cr-Ni-Mn steel after borocoppering for 4 hours before treatment, while an increase in the TCT time from 3 to 5 hours does not lead to a further increase in roughness (Table 5). The resulting roughness after borocoppering (Ra 0.16–0.2 µm), with an initial Ra of 0.06–0.08 µm, meets the requirements for surface roughness of most mechanical engineering products and does not require additional subsequent machining.
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