Alumina coated cutting tool

Details Alumina coated cutting tool Alumina coated cutting tool

B - Operations, Transporting

24

D

B24D 3/00 (2006.01) B24D 3/06 (2006.01) B27L 11/00 (2006.01) C23C 16/40 (2006.01) C23C 30/00 (2006.01)

Patent

CA 2138709

A body with a coating comprising one or more refractory layers of which at least one layer is a layer of .alpha.-Al2O3 textured in the (110) direction is disclosed. Said alumina layer which is essentially free of cooling cracks, comprises platelike grains with a length of 2-8 µm and a length/width-ratio of 1 - 10, preferably 3 - 7. The coated tools according to the present invention show improved tool lives compared to prior art tools when used for machining steel or cast iron material.

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