STRATEGIES TO REPLACE LEAD IN FREE-CUTTING STEELS

Quantitative investigations on the micromechanisms of tool wear have confirmed that dissolution of the tool into the workpiece by a diffusion mechanism is the dominant mode of tool crater wear during the machining of commercial grade AISI 12L14 and AIS1 1215 steels with cemented carbide tools at moderately high cutting speeds (140-200 m/min). At higher cutting speeds, the tribology of seizure operates at tool-chip interface that determines the …