Experiment on work hardening of milling TB6

How the tool wear and milling parameters influence the work hardening in the process of face milling TB6 was studied to figure out the principles of work hardening. The results show that among the parameters selected in the experiments, the work hardening degree ranges from 107% to 112% and the depth of work hardening ranges from 18 μm to 36 μm. The work hardening degree decreases with the increasing of velocity of milling, while the changes of feed and depth of cut show no obvious impacts on it. The amount of flank wear(V_B) influences the work hardening a lot. The depth of work hardening changes from 30 μm to 55 μm, when V_B increases from 0 to 0.2 mm, while it increases to 130 μm when V_B reaches to 0.35 mm. The material softens not deep below the surface and it is more apparent when V_B is increasing.