Methodology for determining optimal grinding parameters for parts coated with clad titanium carbide
DOI:
https://doi.org/10.15276/opu.1.73.2026.09Keywords:
grinding parameters, composite coating, optimization, surface quality characteristics, residual stressesAbstract
The article considers the problem of improving the efficiency of finishing machining of mechanical engineering parts with wear-resistant composite coatings based on a clad titanium carbide (TiC-NiP-Cu) system. During the work, a universal, comprehensive methodology was developed to determine the optimal machining parameters for parts with both plasma composite coatings and other surface layers of various chemical compositions. Optimal grinding parameters for the TiC-NiP-Cu coating have been determined and scientifically substantiated. It has been proven that the proposed parameters enable reliable control of the thermal and stress-strain states of the surface layer. The study accounts for the use of tools with different characteristics (including diamond and electrocorundum wheels), as well as the specifics of machining with cooling lubricants and dry machining. In addition, a direct relationship has been established between the initial parameters of plasma spraying and the optimal parameters for subsequent grinding, enabling maximum specific productivity without compromising adhesion strength. The developed approach is based on the objective of maximizing specific productivity, which is strictly limited by permissible values for residual stresses and the adhesion strength of the coating to the substrate. Furthermore, the necessity of a gradual reduction in the actual depth of cut as the allowance is removed has been experimentally confirmed, thereby ensuring defect-free machining and preventing delamination of the sprayed layer. The application of the developed methodology and the recommended parameters ensures the achievement of the specified qualitative characteristics of the surface (roughness, absence of grinding burns) while maintaining the maximum possible specific productivity of the machining.
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