Earth-boring tools and components thereof including material having hard phase in a metallic binder, and metallic binder compositions for use in forming such tools and components

Patent metadata

Field	Value
Publication number	US-2016208557-A9
Application number	US-201313847282-A
Country	US
Kind code	A9
Filing date	Mar 19, 2013
Priority date	Apr 28, 2004
Publication date	Jul 21, 2016
Grant date	—

Abstract

Binder compositions for use in forming a bit body of an earth-boring bit include at least one of cobalt, nickel, and iron, and at least one melting point-reducing constituent selected from at least one of a transition metal carbide up to 60 weight percent, a transition metal boride up to 60 weight percent, and a transition metal silicide up to 60 weight percent, wherein the weight percentages are based on the total weight of the binder. Earth-boring bit bodies include a cemented tungsten carbide material comprising tungsten carbide and a metallic binder, wherein the tungsten carbide comprises greater than 75 volume percent of the cemented tungsten carbide material.

First claim

What is claimed is:

1 . A body of an earth-boring tool, comprising hard particles in a binder material, the hard particles comprising at least one of a transition metal carbide, a transition metal nitride, a transition metal boride, and a transition metal silicide, the binder material comprising a eutectic or near-eutectic composition.

2 . The body of claim 1 , wherein the hard particles comprise a transition metal carbide.

3 . The body of claim 2 , wherein the eutectic or near-eutectic composition comprises a eutectic or near-eutectic composition of the transition metal carbide and at least one of cobalt, iron, and nickel.

4 . The body of claim 3 , wherein the transition metal carbide comprises tungsten carbide.

5 . The body of claim 4 , wherein the eutectic or near-eutectic composition comprises a eutectic or near-eutectic composition of tungsten carbide and cobalt.

6 . The body of claim 3 , wherein the body comprises greater than 75 volume percent of the transition metal carbide.

7 . The body of claim 6 , wherein some of the transition metal carbide is comprised by the hard particles and some of the transition metal carbide is comprised by the binder material.

8 . The body of claim 1 , wherein the body is at least substantially comprised of the hard particles and the binder material.

9 . The body of claim 1 , wherein the body comprises a bit body of an earth-boring rotary drill bit.

10 . A cast body of an earth-boring tool, comprising a composite material having a microstructure including a hard ceramic phase and a metal phase, wherein the hard ceramic phase comprises at least 75 percent by volume of the composite material, and wherein at least a portion of the composite material is formed from a eutectic or near-eutectic composition.

11 . The cast body of claim 10 , wherein the composite material includes hard particles dispersed within a binder.

12 . The cast body of claim 11 , wherein some of the hard ceramic phase is comprised by the hard particles and some of the hard ceramic phase is formed from the eutectic or near-eutectic composition.

13 . The cast body of claim 10 , wherein the hard ceramic phase comprises a transition metal carbide.

14 . The cast body of claim 13 , wherein the transition metal carbide comprises tungsten carbide.

15 . The cast body of claim 13 , wherein the eutectic or near-eutectic composition comprises a eutectic or near-eutectic composition of the transition metal carbide and at least one of cobalt, iron, and nickel.

16 . The cast body of claim 15 , wherein the eutectic or near-eutectic composition comprises a eutectic or near-eutectic composition of tungsten carbide and cobalt.

17 . The cast body of claim 16 , wherein the metal phase comprises the cobalt.

18 . The cast body of claim 10 , wherein the cast body is at least substantially comprised of the composite material.

19 . The cast body of claim 10 , wherein the cast body comprises a bit body of an earth-boring rotary drill bit.

Assignees

• Baker Hughes Inc
• Tdy Ind Inc

Inventors

• Mirchandani Prakash K
• Eason Jimmy W
• Oakes James J
• Westhoff James C
• Collins Gabriel B

Classifications

• C22C1/1047

  by mixing and casting liquid metal matrix composites · CPC title

• C22C1/1036

  starting from a melt · CPC title

• B22F1/12

  Metallic powder containing non-metallic particles (containing lubricating or binding agents or organic material B22F1/10) · CPC title

• E21B10/567

  with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts · CPC title

• E21B10/62

  characterised by parts, e.g. cutting elements, which are detachable or adjustable (E21B10/64 takes precedence; for roller bits E21B10/20; for augers E21B10/44) · CPC title