The paper presents the results of the study of the influence of laser radiation effect on the instrumental composition. The mathematical model of heat distribution in a multilayer body is developed, which allows relatively simple data processing. Analysis of the results of the thermal state of the multilayer composition based of the developed mathematical model of the thermal effect of laser radiation on the material is also presented. The model allows to theoretically estimate the parameters of laser treatment in the framework of combined hardening treatment. The work is executed at support of RFBR project №18-48-730011.

The results of studies of the effect of coatings based on niobium nitride on the contact characteristics, thermal and stress states of the cutting wedge of a carbide tool are presented. It is shown that the use of these coatings redistributes heat flows in the cutting zone, contact temperatures and specific loads acting on the front surface of the cutting tool, which leads to an improvement in the thermal and stress state. The greatest effect is achieved when using multilayer coatings.

The results of investigations of the contact temperatures on the front surface and the thermal state of cutting wedge of carbide tool using coatings based on complex niobium nitrides are presented. The efficiency of using carbide tools with developed wear-resistant coatings is shown. Further use of the developed coating compositions for creating multilayer coatings is proposed.

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