Patent Number: 6,250,855

Title: Coated milling insert

Abstract: A coated cemented carbide cutting tool (indexable inserts) for the wet or dry milling, particularly at high cutting speeds, of stainless steels of different composition and microstructure, but also for the milling of non-stainless steels such as low carbon steels and low and medium alloyed steels is disclosed. The coated WC-Co based cemented carbide insert includes a specific composition range of WC+Co without any addition of cubic carbides by a low W-alloyed Co binder and by a narrow range defined average WC grainsize, and a hard and wear resistant coating including a multilayered structure of sublayers of the composition (Ti.sub.x Al.sub.1-x)N with repeated variation of the Ti/Al ratio.

Inventors: Persson; Jeanette (Nacka, SE), .ANG.kesson; Leif (Alvsjo, SE), Sundstrom; Rickard (Johanneshov, SE), Ostlund; (Hagersten, SE)

Assignee: Sandvik AB

International Classification: C22C 29/08 (20060101); C22C 29/06 (20060101); C23C 30/00 (20060101); B23B 027/14 ()

Expiration Date: 06/26/2018