| 摘要 |
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 .mu.m and a length/width-ra-tio 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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