Patent ID: 7947363

Claim:
A coated cutting insert for use in a chipforming material removal operation, the cutting insert comprising: a substrate and a wear-resistant coating scheme wherein the wear-resistant coating scheme comprising: a mediate multi-periodicity nanolayer coating scheme containing titanium, aluminum, chromium and nitrogen; and the mediate multi-periodicity nanolayer coating scheme comprising a plurality of sets of alternating layer arrangements wherein each one of the alternating layer arrangements comprises a base layer comprising titanium, aluminum and nitrogen and a nanolayer region comprising a plurality of sets of alternating nanolayers wherein each set of alternating nanolayers comprises one nanolayer comprising aluminum, chromium, titanium and nitrogen and another nanolayer comprising aluminum, chromium, titanium and nitrogen, and the base layer having a base layer thickness and the nanolayer region having a nanolayer region thickness wherein the base layer thickness is smaller than the nanolayer region thickness.