Coated cutting insert

Details Coated cutting insert Coated cutting insert

C - Chemistry, Metallurgy

23

C

117/128, 57/17,

C23C 16/32 (2006.01) B23C 5/16 (2006.01) B24D 3/14 (2006.01) C23C 16/40 (2006.01) C23C 16/56 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2019077

The present invention relates to a body coated with at least one double layer Al2O3-TiC. Because the Al2O3-layer in contact with the TiC-layer consists of kappa-Al2O3 or theta- Al2O3 an improved adherence has been obtained. A further improvement.of the properties is obtained if the body after the coating is heat treated fox 0.3-10 hours at 900-1100 °C in protecting gas atmosphere at which initially nucleated kappa- or theta-Al2O3 is transformed to fine- grained alpha-Al2O3.

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