Polycrystalline cubic boron nitride cutting tool

Details Polycrystalline cubic boron nitride cutting tool Polycrystalline cubic boron nitride cutting tool

1999-07-27

2000-10-31

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 87, 501 961, 407119, C04B 355831

Patent

active

061402621

ABSTRACT:
The polycrystalline cubic boron nitride cutting tool has a particle size in the range of from 10-17 microns. In addition to CBN, the tool has from 2%-15% by weight of a refractory compound selected from the group consisting of titanium carbonitride, titanium aluminum carbonitride, titanium carbide, titanium nitride, titanium diboride and aluminum diboride. When using one of the carbonitrides, the carbon to nitrogen proportion is preferably in the range of from 30 atomic percent carbon and 70 atomic percent nitrogen to 70 atomic percent carbon and 30 atomic percent nitrogen, and preferably is about 50 atomic percent carbon and 50 atomic percent nitrogen. In addition, there is an infiltrant containing aluminum and/or silicon. The cutting tool is not formed on a cemented tungsten carbide substrate so is substantially free of cobalt.

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