ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,971, issued on April 14, was assigned to AB Sandvik Coromant (Sandviken, Sweden).
"Coated cutting tool" was invented by Linus Von Fieandt (Sandviken, Sweden), Raluca Morjan Brenning (Sandviken, Sweden) and Jan Engqvist (Sandviken, Sweden).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting tool includes a substrate at least partially coated with a coating. The substrate is a cemented carbide, cermet or ceramic. The coating includes a layer of Ti(C,N), a layer of Al2O3 and there between a bonding layer. The Ti(C,N) layer is composed of columnar grains, wherein an average grain size D422 of the Ti(C,N) layer is 25-50 nm, and wherein the Ti(C,N) l...