INCREASING THE LIFETIME OF HIGH-SPEED MODULAR MILLING CUTTERS WHEN MACHINING PARTS FROM HARD-TO-MACHINE ALLOYS BASED ON THE USE OF DEVELOPED MULTI-COMPONENT COMPOSITE COATINGS WITH A NANO-SIZED STRUCTURE

During cutting, tools experience significant mechanical and thermal loads, so special attention is paid to the correct selection of tool material, which plays a key role in ensuring performance characteristics such as wear resistance, productivity, and reliability. An analysis of the properties of the main tool materials reveals that currently no tool material offers the optimal combination of cutting properties. As hardness and wear resistance increase, strength typically decreases. Of all the available tool materials, hard alloys are the most widely used. They offer an optimal combination of hardness and wear resistance on one hand, and strength on the other, enabling high-performance machining.