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US 5,733,649 AGranted
Matrix for a hard composite
AssigneeKennametal Inc.
InventorsHarold E. Kelley, William E. Silvis, Charles J. Terry
Life of this patent
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Abstract
A matrix powder for formation along with an infiltrant into a matrix for use as a wear element or for use in retaining at least one discrete hard element. The matrix powder including macrocrystalline tungsten carbide particles, crushed sintered cemented macrocrystalline tungsten carbide particles, tungsten carbide, and an iron-based component.
Claims9
A matrix powder for formation along with an infiltrant into a matrix, the matrix powder comprising:
- about 100 weight percent crushed sintered cemented macrocrystalline tungsten carbide particles having a particle size of -120 +400 mesh;
- and the composition of the crushed sintered cemented macrocrystalline tungsten carbide comprising between about 6 weight percent and about 13 weight percent cobalt and between about 87 weight percent and about 94 weight percent tungsten carbide.
A powder for formation along with an infiltrant into a matrix, the powder comprising:
- (a) up to about 50 weight percent of the powder being macrocrystalline tungsten carbide particles with a particle size of -80 +325 mesh;
- (b) up to about 75 weight percent of the mixture being crushed sintered cemented macrocrystalline tungsten carbide particles of a particle size of -80 mesh, and having the following composition:
- about 6 weight percent cobalt, a maximum of 1 weight percent iron, a maximum of 1.0 weight percent tantalum, a maximum of 1.0 weight percent titanium, a maximum of 0.5 weight percent niobium, a maximum of 0.5 weight percent of other impurities and the balance macrocrystalline tungsten carbide having an average particle size between about 5 micrometers and about 25 micrometers;
- (c) up to about 24 weight percent of the mixture being cast tungsten carbide having an average particle size of -270 mesh;
- (d) between about 0.5 and about 1.5 weight percent of the mixture being principally iron having a particle size of between about 3 micrometers and about 5 micrometers.
2 more elements
Dependencies are inferred from the claim text.