Composition for a novel grade for cutting tools
A hard metal composition of material comprised of, in weight percent, an alloy of from 6-15% of cobalt content; a molybdenum content of from 5-15% of the cobalt content and a chromium carbide content of from 0-15% of the cobalt content and the balance of tungsten carbide.
1. A hard metal composition of material, consisting of:
cobalt in an amount of from 6-15 wt %;
molybdenum in an amount of from 5-15% of the cobalt content;
chromium carbide in an amount of from 5-15% of the cobalt content; and
a balance of tungsten carbide.
2. The hard metal composition according to claim 1 , wherein the molybdenum content is 15% and the chromium carbide content is 15% of the cobalt content.
3. The hard metal composition according to claim 1 , wherein the material has a grain size of less than 1 μm.
4. The hard metal composition according to claim 1 , wherein the material has a hardness of 1570 HV30 to 1710 HV30 and a toughness of 9.8 K1c (Shetty) to 11.0 K1c (Shetty).
5. A cutting tool comprising a hard metal composition of material, the material consisting of:
cobalt in an amount of from 6-15 wt %;
molybdenum in an amount of from 5-15% of the cobalt content;
chromium carbide in an amount of from 5-15% of the cobalt content; and
a balance of tungsten carbide.