PVD (Ti,Al) N Coating and Its Tooling Quality

The coating has become an important way to improve on the tooling quality of tool. The property of the (Ti, Al) N coating made by the coating machine of Shanghai Tool Works was analyzed. It was revealed that the surface hardness of the (Ti, Al) N coating is as high as 32GPa, but that of the TiN coating is only as high as 24GPa. At the same time the growth of the (Ti, Al) N coating is in a good state. The dry cutting testing shows that wear loss of the (Ti, Al) N coating during the cutting will be less than that of the TiN coating , and its cutting life is longer compared with the TiN coating. The (Ti,Al) N coating is fit for high speed cutting. The main reasons why the (Ti, Al) N coating is applicable for high speed cutting were analyzed as well.