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Journal of Materials Science

, Volume 41, Issue 24, pp 8367–8371 | Cite as

Strength of functionally designed cellular cemented carbides produced by coextrusion

  • Sean E. Landwehr
  • Gregory E. Hilmas
  • Anthony Griffo
Article

Abstract

In an effort to improve the wear characteristics of petroleum drill bit inserts, a series of cemented carbide materials with a functionally designed cellular (FDC) architecture were fabricated by a coextrusion process. The FDC architecture characterized in this study was comprised of cemented carbide cells surrounded by a ductile cobalt cell boundary. Property evaluation employed transverse rupture strength (TRS) testing to characterize their mechanical behavior. It was determined that the presence of Co2 + x W4 − x C in the material greatly affected the bonding of the cell to the cell boundary and therefore the strength of the material. Fractography of the FDC materials supported the hypothesis that the interface between the cell and cell boundary was affected by the Co2 + x W4 − x C phase and the consequential reduction in cobalt content of the cell.

Keywords

Cobalt Wear Resistance Cell Boundary Cell Material Cobalt Content 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors would like to thank Brian White and Greg Lockwood of Smith Bits, and Jeff Rodelas of University of Missouri-Rolla for their hard work and input on testing, processing, and other characterization. We would like to thank Kennametal Engineered Products (Traverse City, MI) for performing the ROC processing. For his help in producing the cemented carbides powders in this study, and coordinating the ROC processing we would like to thank Jonathan Bitler of Kennametal AMSG (Rogers, AR).

References

  1. 1.
    Brookes KJA (1996) World Directory and Handbook of Hardmetals and Hard Materials, 6 th ed., International Carbide Data, East Barnet, Hertfordshire, UK, p 26Google Scholar
  2. 2.
    Fang ZZ, Griffo A, White B, Lockwood G, Belnap D, Hilmas G, Bitler J (2001) Intl J Refrac Met Hard Mater 19:453CrossRefGoogle Scholar
  3. 3.
    Fang Z, Lockwood G, Griffo A (1999) Metall Mater Tran A 30A(12):3231Google Scholar
  4. 4.
    Landwehr S, Hilmas G, Huang T, Griffo A, White B (2003) Adv Powd Metall Partic Mat 6–163Google Scholar
  5. 5.
    Coblenz WS (1988) U.S. Patent No. 4,772,524Google Scholar
  6. 6.
    Baskaran S, Nunn SD, Popovic D, Halloran JW (1993) J Amer Cer Soc 76(9):2209CrossRefGoogle Scholar
  7. 7.
    Baskaran S, Halloran JW (1993) J Amer Cer Soc 76(9):2217CrossRefGoogle Scholar
  8. 8.
    Baskaran S, Halloran JW (1994) J Amer Cer Soc 77(5):1249CrossRefGoogle Scholar
  9. 9.
    Baskaran S, Nunn SD, Halloran JW (1994) J Amer Cer Soc 77(5):1256CrossRefGoogle Scholar
  10. 10.
    Kovar D, King BH, Trice RW, Halloran JW (1997) J Amer Cer Soc 80(10):2471CrossRefGoogle Scholar
  11. 11.
    Hilmas G, Brady A, Abdali U, Zywicki G, Halloran J (1995) Mat Sci Eng A195:263Google Scholar
  12. 12.
    Popovic’ D, Halloran J, Hilmas GE, Brady GA, Somers S, Barda A, Zywicki G (1997) U.S. Patent No. 5,645,781Google Scholar
  13. 13.
    Kelto CA, Timm EE, Pyzik AJ (1989) Ann Rev Mat Sci 19:527CrossRefGoogle Scholar
  14. 14.
    Timm EE (1988) Proc Adv Hard Mat Prod, 9–1Google Scholar
  15. 15.
    Lizenby JR, Lizenby KJ, Barnard LJ (1987) U.S. Patent 4,656,002Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • Sean E. Landwehr
    • 1
  • Gregory E. Hilmas
    • 1
  • Anthony Griffo
    • 2
  1. 1.Materials Science and Engineering DepartmentUniversity of Missouri-RollaRollaUSA
  2. 2.Smith BitsHoustonUSA

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