Alumina coated cutting tool

Details Alumina coated cutting tool Alumina coated cutting tool

1997-10-09

1999-11-09

Speer, Timothy

Coating processes

Coating by vapor, gas, or smoke

Base includes an inorganic compound containing silicon or...

42725521, 42725528, C23C 1600

Patent

active

059809884

ABSTRACT:
A body with a coating comprising one or more refractory layers of which at least one layer is a layer of .alpha.-Al.sub.2 O.sub.3 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 ratio of 1-10, preferably 3-7. The coated tools according to the presently claimed invention show improved tool lives compared to prior art tools when used for machining steel or cast iron material.

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