| 摘要 |
A coated polycrystalline cubic boron nitride cutting insert (28, 58), which has a polycrystalline cubic boron nitride substrate (70, 126) with a cutting edge (34, 66). A wear-resistant coating scheme (74, 74A) is on the polycrystalline cubic boron nitride substrate. The wear-resistant coating scheme includes an inner coating layer region (94, 150) and at least one exposed alumina coating layer (84, 84A, 138). The exposed alumina coating layer (84, 84A, 138) exhibiting a post-blasted stress condition with stress ranging between about 50 MPa (tensile stress) and about - 2GPa (compressive stress) as measured by XRD using the Psi tilt method and the (024) reflection of alumina. The exposed coating layer (84, 84A, 138) is the result of wet blasting an outer titanium-containing coating layer (86, 88, 140, 142) from the surface of the alumina-containing coating layer region (84, 138). |
