Metal matrix composites for drill bits
AssigneeKennametal Inc.
InventorsSenthilkumar Chandrasekaran, Travis Earl Puzz
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Abstract
Metal matrix composite particle mixtures are disclosed comprising (a) primary tungsten metal particles; (b) metal carbide particles; (c) substantially spherical fused carbide particles; and (d) a binder. The present invention also provides a metal matrix composite comprising metal matrix composite particle mixtures disclosed herein and binders.
Claims31
A metal matrix composite for use in a drill bit, the metal matrix composite comprising:
- (a) a metal matrix composite particle mixture comprising:
- (i) primary metal particles;
- (ii) metal carbide particles;
- and
- (iii) substantially spherical fused carbide particles;
- and
- (b) a metal binder.
A metal matrix composite particle mixture for use in a drill bit comprising a mixture of:
- (a) primary metal particles;
- (b) metal carbide particles;
- and
- (c) substantially spherical fused carbide particles.
A metal matrix composite for use in a drill bit, the metal matrix composite comprising:
- (a) a metal matrix composite particle mixture comprising:
- (i) primary metal particles comprising tungsten in an amount of 30 weight percent to 50 weight percent, wherein the primary metal particles have an average particle size of less than 20 microns;
- (ii) metal carbide particles in an amount of 30 weight percent to 50 weight percent, wherein the metal carbide particles have an average particle size of 20 microns to 45 microns;
- (iii) substantially spherical fused carbide particles in an amount of 10 weight percent to 20 weight percent, wherein the substantially spherical fused carbide particles have an average particle size of 150 microns to 400 microns;
- and
- (iv) secondary metal particles comprising nickel in an amount of 2 weight percent to 8 weight percent, wherein the secondary metal particles have an average particle size of 3 microns to 7 microns;
- and
- (b) a metal binder.
Dependencies are inferred from the claim text.