Composite electrolytic coatings (CEC) of the compositions  Ni+B and Ni+B+Cr3C2 were subjected to heat treatment in vacuum as well as treatment with laser, which markedly improved their tribotechnical properties. The wear resistance increased with increasing friction loads. When the coatings were melted in vacuum, their wear resistance decreased by an order of magnitude for the Ni+B coatings and by twice for  the Ni+B+Cr3C2 coatings, whereas upon melting with laser by 7-21 times. This is due to the presence of inclusions of the Ni₃В boride and the Ni-В-Cr-C eutectic, characterized by high mechanical properties.

The Cr3C2 particles markedly increase the wear resistance of melted CEC thanks to additional strengthening of the Ni matrix with Cr and dispersed graphite inclusions. The Ni+B+Cr3C2 coatings have a higher wear resistance compared to that of CEC from Ni+B. The tribotechnical characteristics of coatings treated with laser are better than those of coatings melted in the furnace owing to the formation of a more disperse structure of the components having high mechanical properties. A discrete melting provides higher wear resistance compared to that in the case of a continuous melting.  Herein coatings melted under an impulse regime possess a higher wear resistance than coatings melted by stripes. In the viewpoint of the  minimal wear, the optimal melted area is equal to 40% for the stripes  and to 25% for the impulse regime.  

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