CA2529995A1 - Cemented carbide inserts for earth-boring bits - Google Patents

Cemented carbide inserts for earth-boring bits Download PDF

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Publication number
CA2529995A1
CA2529995A1 CA002529995A CA2529995A CA2529995A1 CA 2529995 A1 CA2529995 A1 CA 2529995A1 CA 002529995 A CA002529995 A CA 002529995A CA 2529995 A CA2529995 A CA 2529995A CA 2529995 A1 CA2529995 A1 CA 2529995A1
Authority
CA
Canada
Prior art keywords
cemented
carbide
hard particles
cutting insert
cemented carbide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002529995A
Other languages
French (fr)
Other versions
CA2529995C (en
Inventor
Prakash K. Mirchandani
Alfred J. Mosco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDY Industries LLC
Original Assignee
TDY Industries LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TDY Industries LLC filed Critical TDY Industries LLC
Priority to CA2781651A priority Critical patent/CA2781651C/en
Publication of CA2529995A1 publication Critical patent/CA2529995A1/en
Application granted granted Critical
Publication of CA2529995C publication Critical patent/CA2529995C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • E21B10/52—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Abstract

This invention relates to cutting inserts for earth boring bits comprising a cutting zone, wherein the cutting zone comprises first cemented hard particles and a body zone, wherein the body zone comprises second cemented hard particles. The first cemented hard particles may differ in at least one property from the second cemented hard particles. As used herein, the cemented hard particles means a material comprising hard particles in a binder. The hard particles may be at least one of a carbide, a nitride, a boride, a silicide, an oxide, and solid solutions thereof and the binder may be at least one metal selected from cobalt, nickel, iron and alloys of cobalt, nickel or iron.

Claims (45)

1. A cutting insert for an earth boring bit, comprising:
a cutting zone comprising first cemented hard particles; and a body zone comprising second cemented hard particles, wherein the first cemented hard particles differ in at least one property from the second cemented hard particles.
2. The cutting insert of claim 1, wherein first cemented hard particles and the second cemented hard particles independently comprise hard particles in a binder.
3. The cutting insert of claim 2, wherein the hard particles of the first cemented hard particles and the second cemented hard particles are independently selected from at least one of a carbide, a nitride, a boride, a silicide, an oxide, and solid solutions thereof.
4. The cutting insert of claim 2, wherein the binder of the first cemented hard particles and the second hard particles independently comprise at least one metal selected from cobalt, nickel, and iron.
5. The cutting insert of claim 2, wherein the hard particles of the first cemented hard particles and the second cemented hard particles are independently at least one cemented carbide powder comprising a carbide of at least one transition metal selected from titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten.
6. The cutting insert of claim 4, wherein the binder further comprises an alloying agent selected from tungsten, titanium, tantalum, niobium, chromium, molybdenum, boron, carbon, silicon, ruthenium, rhenium, manganese, aluminum, and copper.
7. The cutting insert of claim 2, wherein the hard particles of the first cemented hard particles and the second cemented hard particles comprise tungsten carbide.
8. The cutting insert of claim 6, wherein the binder of the first cemented hard particles and the binder of the second cemented hard particles comprise cobalt.
9. The cutting insert of claim 1, wherein at least one property is selected from the group consisting of modulus of elasticity, hardness, wear resistance, fracture toughness, tensile strength, corrosion resistance, coefficient of thermal expansion, and coefficient of thermal conductivity.
10. The cutting insert of claim 5, wherein the binder of the first cemented hard particles and the binder of the second cemented hard particles differ in chemical composition.
11. The cutting insert of claim 5, wherein the weight percentage of the binder within the first cemented hard particles differs from the weight percentage of the binder within the second cemented hard particles.
12. The cutting insert of claim 5, wherein the transition metal carbide of the first cemented hard particles differs from the transition metal carbide of the second cemented hard particles in at least one of chemical composition and average grain size.
13. The cutting insert of claim 5, wherein the first cemented hard particles and the second cemented hard particles each comprise 2 to 40 weight percent of the binder and 60 to 98 weight percent of the transition metal carbide.
14. The cutting insert of claim 1, wherein at least one of the first cemented hard particles and the second cemented hard particles comprise tungsten carbide particles having an average grain size of 0.3 to 10 µm.
15. The cutting insert of claim 1, wherein at least one of the first cemented hard particles and the second cemented hard particles comprises tungsten carbide particles having an average grain size of 0.5 to 10 µm and the other of the first cemented hard particles and the second cemented hard particles comprises tungsten carbide particles having an average particle size of 0.3 to 1.5 µm.
16. The cutting insert of claim 5, wherein one of the first cemented hard particles and the second cemented hard particles includes 1 to 10 weight percent more of the binder than the other of the first cemented hard particles and the second cemented hard p articles.
17. The cutting insert of claim 1, wherein the modulus of elasticity of the first cemented hard particles within the cutting zone differs from the modulus of elasticity of the second cemented hard particles within the body zone.
18. The cutting insert of claim 1, wherein the hardness of the first cemented hard particles within the cutting zone is 90 to 94 HRA and the hardness of the second cemented hard particles within the body zone is 85 to 90 HRA.
19. The cutting insert of claim 1, wherein at least one of hardness and wear resistance of the first cemented hard particles within the cutting zone differs from the second cemented hard particles within the body zone.
20. The cutting insert of claim 1, wherein the first cemented hard particles comprise 6 to 15 weight percent cobalt alloy and the second cemented hard particles comprise 10 to 15 weight percent cobalt alloy.
21. The cutting insert of claim 1, wherein at least one of the first cemented hard particles and the second cemented hard particles comprise cemented carbides and wherein at least of portion of the cemented carbides have been recycled.
22. The cutting insert of claim 20, wherein the second cemented carbide comprises at least one cemented carbide and wherein at least a portion of the cemented carbide has been recycled.
23. A cutting insert for an earth-boring drill bit, comprising:
24 a cutting zone; and a body zone, wherein at least one of the cutting zone and the body zone comprises a hybrid cemented carbide.

24. The cutting insert of claim 22, wherein the cutting zone comprises a hybrid cemented carbide and the body zone comprises a conventional cemented carbide.
25. The cutting insert of claim 23, wherein the cemented carbide and the hybrid cemented carbide individually comprise transition metal carbides in a binder.
26. The cutting insert of claim 24, wherein the binder of the cemented carbide and the hybrid cemented carbide independently comprise at least one metal selected from cobalt, nickel, iron and alloys of iron, nickel and iron.
27. The cutting insert of claim 24, wherein the transition metal carbides of the cemented carbide and the hybrid cemented carbide independently comprise at least one transition metal carbide selected from titanium carbide, chromium carbide, vanadium carbide, zirconium carbide, hafnium carbide, tantalum carbide, molybdenum carbide, niobium carbide, and tungsten carbide.
28. The cutting insert of claim 26, wherein the transition metal carbide of the cemented carbide and the hybrid cemented carbide comprise tungsten carbide.
29. The cutting insert of claim 22, wherein the cutting zone and the body zone independently comprise cemented carbides comprising tungsten carbide in a cobalt binder.
30. The cutting insert of claim 22, wherein the hybrid cemented carbide comprises particles of a first cemented carbide grade dispersed throughout a continuous phase of a second cemented carbide continuous phase.
31. The cutting insert of claim of claim 29, wherein the first cemented carbide grade has at least one property that is different than the second cemented carbide grade.
32. The cutting insert of claim of claim 29, wherein the contiguity ratio of the particles of a first cemented carbide dispersed in the continuous phase of a second cemented carbide is less than or equal to 0.48.
33. The cutting insert of claim of claim 30, wherein a hardness of the first cemented carbide grade is greater than the hardness of the second carbide continuous phase.
34. The cutting insert of claim of claim 32, wherein a hardness of the first cemented carbide is greater than or equal to 88 HRA, and less than or equal to 95 HRA
and the hardness of the second cemented carbide continuous phase is greater than or equal to 78 HRA and less than or equal to 91 HRA.
35. The cutting insert of claim of claim 29, wherein the volume fraction of the first cemented carbide is less than 50 volume percent of the hybrid cemented carbide region and the contiguity ratio of the first cemented carbide is less than or equal to 1.5 times the volume fraction of the second cemented carbide.
36. A method of preparing a cutting insert for an earth-boring bit, comprising:
partially filling a mold with a first cemented hard particle powder;
filling at least a portion of the remaining portion of the mold with a second cemented hard particle powder;
consolidating the first and second cemented hard particle powders into a single green compact; and sintering the second green compact.
37. The method of claim 36, wherein sintering the green compact is performed at a temperature between 1300°C and 1500°C.
38. The method of claim 36, wherein the first cemented carbide powder and the second cemented carbide powder independently comprise a carbide of at least one transition metal selected from titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten, and a binder comprising cobalt, nickel, iron, and alloys of cobalt, nickel, and iron.
39. The method of claim 38, wherein the binder further comprises an alloying agent selected from tungsten, titanium, tantalum, niobium, chromium, molybdenum, boron, carbon, silicon, and ruthenium.
40. A method of preparing a cutting insert for an earth-boring bit, comprising:
consolidating a first cemented carbide powder in a mold forming a first green compact;
placing the first green compact in a second mold, wherein the first green compact fills a portion of the second mold;
filling a remaining portion of the second mold with a second cemented carbide powder;
consolidating the second cemented carbide powder and the first green compact together to form a second green compact; and sintering the second green compact.
41. The method of claim 40, wherein sintering the second green compact is performed at a temperature between 1300°C and 1500°C.
42. The method of claim 40, wherein the first cemented carbide powder and the second cemented carbide powder independently comprise a carbide of at least one transition metal selected from titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten, and a binder comprising cobalt, nickel, iron, and alloys of cobalt, nickel, and iron.
43. The method of claim 42, wherein the binder further comprises an alloying agent selected from tungsten, titanium, tantalum, niobium, chromium, molybdenum, boron, carbon, silicon, and ruthenium.
44. A method of preparing a cutting insert for an earth-boring bit, comprising:
pressing a first cemented carbide powder and a second cemented carbide in a mold to form a green compact, wherein at least one of the first cemented carbide and the second cemented carbide powder comprise a recycled cemented carbide powder; and sintering the green compact.
45. The method of claim 36, further comprising presintering the first green compact at temperatures up to 1250°C.
CA2529995A 2004-12-16 2005-12-13 Cemented carbide inserts for earth-boring bits Expired - Fee Related CA2529995C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2781651A CA2781651C (en) 2004-12-16 2005-12-13 Cemented carbide inserts for earth-boring bits

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/013,842 2004-12-16
US11/013,842 US7513320B2 (en) 2004-12-16 2004-12-16 Cemented carbide inserts for earth-boring bits

Related Child Applications (1)

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CA2529995A1 true CA2529995A1 (en) 2006-06-16
CA2529995C CA2529995C (en) 2012-09-25

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EP (4) EP2264201A3 (en)
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US20060131081A1 (en) 2006-06-22
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CA2781651A1 (en) 2006-06-16
US20090180915A1 (en) 2009-07-16
EP2479306A1 (en) 2012-07-25
EP2264201A2 (en) 2010-12-22
US7513320B2 (en) 2009-04-07
EP2270244A1 (en) 2011-01-05
EP1686193A2 (en) 2006-08-02
EP1686193A3 (en) 2007-03-28
CA2529995C (en) 2012-09-25

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