Ceramic cutting insert of polycrystalline tungsten carbide
AssigneeCerbide Corporation
InventorLinwood Anderson
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Abstract
A polycrystalline tungsten carbide ceramic cutting insert with chip control is disclosed for high speed machining.
Claims13
A ceramic cutting insert for high speed machining made of material consisting essentially of an iron group element between about 0.01% by volume and about 0.25% by volume, and polycrystalline tungsten carbide wherein the polycrystalline tungsten carbide has:
- (a) a density of at least 95% of its theoretical density;
- and
- (b) an average grain size of 0.001 to 10 micrometers and
- wherein the cutting insert comprises:
- (c) a cutting edge;
- (d) a rake face with a chip control groove surface;
- (e) a flank face;
- wherein the cutting edge is formed at the juncture of the flank face and the rake face.
A ceramic cutting insert for high speed machining with a chip control groove surface consisting essentially of polycrystalline tungsten carbide wherein an iron group element is present from about 0.01% by volume to about 0.25% by volume and the polycrystalline tungsten carbide:
- (a) has a density of at least 98% of its theoretical density;
- and
- (b) an average grain size of 0.001 to 10 micrometers.
Dependencies are inferred from the claim text.