Abstract
The results of computer simulation of thermophysical phenomena in the contact zone during blade cutting of metals with multi-layer composite wear-resistant coatings that ensure the adaptability of the cutting wedge to friction conditions are presented. On-site experimental studies of the cutting temperature during turning with various coatings, structural-phase analysis of the surface layer of the cutting tool to explain the mechanism of formation of secondary structures with a shielding effect – the effect of selforganization.
Highlights
The efficiency of automation of technological processes and the use of modern expensive high-performance machine-tool equipment equipped with mechatronic systems requires a more complete study of the features of the temperature-force conditions of blade metal cutting, where the weakest link in terms of wear resistance is the cutting tool [1,2,3]
Considerable experience and theoretical and experimental studies have been accumulated to improve the performance of cutting tools by using modern multilayer composite wear-resistant coatings that are capable of adapting to frictional conditions during cutting by forming protective secondary structures
The analysis of the literature data showed that in the presence of numerous works [2,3,4,5] on the study of contact processes when working with a cutting tool covered with a multilayer composite wear-resistant coating, there are no data on the study of the effect of the use of cooling lubricants and the coatings themselves that have the effect self-organization during friction and the formed protective secondary structures on the contacting surfaces on the distribution of heat fluxes from the cutting zone and control of temperature and power conditions during cutting, by varying the physicomechanical, thermophysical, physicochemical parameters of media and coatings
Summary
The efficiency of automation of technological processes and the use of modern expensive high-performance machine-tool equipment equipped with mechatronic systems requires a more complete study of the features of the temperature-force conditions of blade metal cutting, where the weakest link in terms of wear resistance is the cutting tool [1,2,3]. Considerable experience and theoretical and experimental studies have been accumulated to improve the performance of cutting tools by using modern multilayer composite wear-resistant coatings that are capable of adapting to frictional conditions during cutting by forming protective secondary structures. It is known [4,5,6,7,8] that cutting is a thermodynamic process, and at the same time thermal phenomena in the contact zone have a significant effect, both on the whole on the state of the cutting wedge and on the structuralphase state of the surface layer of the coated tool, due to the activation and passivation of energy. These changes concern many characteristic properties of rubbing surfaces and nearby surface layers (for example, geometric parameters, microstructure, physicochemical and mechanical properties)
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