Specifics of Application of Cutting Ceramics with Functional Coating in Turning of High-Strength Materials

Abstract

This paper reviews some of the features of application of cutting ceramics with Ti-TiN-(TiAlZr)N coating for machining of high-strength hardened alloy steel. The study has revealed the conceptual role of coatings on ceramic cutting tools, which can serve as a scientific and technological basis for further improvement of the ceramic tool. It has been found out that the coating increases the antifriction properties of ceramics both due to lower coefficient of friction of the coating material and to reduction of roughness of rake face of the tool, and that is the main cause of 25% reduction in cutting force components for the coated tool, wherein the difference in cutting forces for the coated and uncoated tools is inversely proportional to the thickness of the slice. On the basis of the analysis of the studies on the issues of cutting with coated tools of ceramic material and the results of research presented in this paper, the conceptual role of the coating on the working surfaces of the ceramic tool was formulated, and it can serve as a scientific and technological basis for further improvement of the ceramic tool.

Improvement reliability of cutting ceramic through use of damping system and nanostructured multilayered composite coatings

“…It is found that in action of external thermomechanical stresses on contact areas of cutting tool, as well as in development of wear centers, particularly on flank face, the ceramic tool is exposed to complex stress effect, resulting in brittle fracture of its contact areas and cutting edge [13][14][15][16][17][18].…”

Multilayer composite nanoscale coatings as a method to increase reliability and tool life of cutting tools made of mixed ceramic Al2O3-TiC

“…To produce modifying effect on working surfaces of ceramic tool, the study involved the innovative process, named as "filtered vacuum arc deposition" and implemented at unit VIT-2 [10][11][12][13]. The use of the above method does not result in structural changes in ceramic material and ensures the following:…”

Estimation of the Sensitivity of a Complex of Characteristics of the Stress State of the Ceramiccoating Boundary to a Change in the Properties of the Structural Elements of This System

“…Отсутствуют инженерные методы расчета керамических изделий, учитывающие специфику их напряженного состояния и разрушения в определенных условиях эксплуатации [5]. Еще более проблемным является процесс проектировании керамических изделий с одно-и многослойными покрытиями [6][7][8][9]. Функциональные покрытия, залечивающие поверхностный слой керамики, значительно усложняют напряженное состояние и процесс разрушения керамических изделий [10][11][12][13].…”