Cutting Performance Improvement of Ti(C,N)-Based Cermet Tools by Adding High-Entropy Carbide in Turning Nodular Cast Iron

Abstract

This work reported the cutting performance and wear mechanism of Ti(C,N) cermet inserts with 0wt%, 5wt%, 10wt% and 15wt% high-entropy carbide (HEC) (Ta0.2W0.2Nb0.2Mo0.2V0.2)C phase for turning nodular cast iron. It was found that the effective cutting life were 402s, 720s, 632s and 465s for cermet tools with 0wt%, 5wt%, 10wt% and 15wt% HEC phase, respectively. The tool with 5wt% HEC phase showed better cutting performance and the longest cutting life. The wear mechanism of cermet tool inserts during cutting nodular cast iron was generally dominated by adhesive wear, oxidation wear, diffusion wear and abrasive wear on the flank face, combined with diffusion wear, oxidation wear and abrasive wear on the rake face. The improved cutting performance of tool insert indicated that (Ta0.2W0.2Nb0.2Mo0.2V0.2)C could be adopted as an effective reinforced phase in the cermet cutting tools.

Keywords: Cermet tool insert, High-entropy carbide, Microstructure, Wear and tribology, Tool life