公开(公告)号：US20200308707A1

公开(公告)日：2020-10-01

申请号：US16311013

申请日：2017-06-20

Applicant: SANDVIK INTELLECTUAL PROPERTY AB

Inventor： Raluca MORJAN BRENNING ,  Jan ENGQVIST ,  Erik LINDAHL ,  Ernesto CORONEL

IPC: C23C28/04 ,  C23C16/36 ,  B26D1/00 ,  B23C3/00 ,  C23C16/40 ,  C23C16/30

Abstract: A coated cutting tool for chip forming machining of metals includes a substrate having a surface coated with a chemical vapour deposition (CVD) coating. The substrate is coated with a coating having a layer of α-Al2O3, wherein the α-Al2O3 layer exhibits a texture coefficient TC(0 0 12)≥7.2 and wherein the ratio of I(0 0 12)/I(0 1 14)≥0.8. The coating further includes a MTCVD TiCN layer located between the substrate and the α-Al2O3 layer. The MTCVD TiCN layer exhibits a pole figure, as measured by EBSD, in a portion of the MTCVD TiCN layer parallel to the outer surface of the coating and less than 1 μm from the outer surface of the MTCVD TiCN, wherein a pole plot based on the data of the pole figure, with a bin size of 0.25° over a tilt angle range of 0°≤β≤45° from the normal of the outer surface of the coating shows a ratio of intensity within β≤15° tilt angle to the intensity within 0°≤β≤45° of ≥45%.