Abstract：Carbide inserts of ISO grade M35 and P45 were utilized in the experiment of highfeed milling M28, a kind of ultra-strength titanium alloy to make a further understanding of the tool wear. The flank wear development and its effect on cutting forces were compared between these two kinds of carbides. The flank wear region was observed by the scanning electron microscope (SEM), and the components of adhesion material were detected by the energy dispersive spectrometer (EDS) to analyze the wear mechanism in M28 high feed cutting. The carbide tools were rapidly worn out. Notch wear was caused in a specific region of the edge by burrs and hardening layer. With the relative motion between the adhesion and the tool, WC grains were pulled out by the adhesion material, and cracks grew as the result of shear in the carbide matrix. Finally, the slice-like peeling was formed on the flank face. The peeling dimension is associated with WC grain size. The P45 carbide tool with coarser grains shows relatively less wear damage than that of the M35 carbide tool since the coarse grain can offer better wear resistance.
2021, 
