High-speed dry face-milling experiments on ultra high strength alloy steel, a kind of difficult-to-cut materials, with σ_b>1.6 GPa, hardness 50HRc, were conducted using (Ti,Al)N coated carbide tools at the cutting speed range of 118～236 m/min. By the use of SEM and energy spectrometer, and taking tool life as a criterion for a comparative evaluation of the tool's cutting performance, the wear mode and mechanisms of rake face and flank face wear, coupled with the cutting performances of carbide tools are dis...
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