Journal of Superhard Materials

, Volume 41, Issue 5, pp 302–309 | Cite as

Microstructures and Properties of Fe–Co–Cu Pre-Alloyed Powder for Geological Diamond Bits

  • Delong XieEmail author
  • Haiqing Qin
  • Feng Lin
  • Xiaoyi Pan
  • Chao Chen
  • Leyin Xiao
  • Jiarong Chen
  • Peicheng Mo
Production, Structure, Properties


For geological diamond bits Fe–Co–Cu alloys are the a generation of metal matrix. In this paper, the Fe–Co–Cu pre-alloys with various chemical compositions were synthesized using the co-precipitation method, which were subsequently sintered at different temperatures. The structural, thermal and properties of the powders and its sintered materials were characterized by various techniques. X-ray diffraction studies indicated that solid solutions were formed for the alloys during co-precipitation process. Microstructures of these pre-alloyed powders exhibited that the sintering process was facilitated by the irregular shapes, interconnected fine particles as well as the large surface areas. The thermal effects of the pre-alloyed powders were explored by differential scanning calorimetry. The optimal sintering temperature for each pre-alloyed powder was determined by the mechanical analysis. Scanning electron microscopic results show that the composition ratio of Fe and Cu had a significant impact on the microstructures of the sintered materials, and the 65%Fe-20%Cu-15%Co alloy reached the best surface coverage over the diamond bits. The drilling performances for various pre-alloyed powders were verified by micro-drilling experiments. Those results suggested that the 65%Fe-20%Cu-15%Co alloy exhibited the optimal performance for application in geological diamond drilling bits.


pre-alloyed powder sintering co-precipitation method geological diamond bit 


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  1. 1.
    Mechnyk, V.A., Diamond–Fe–Cu–Ni–Sn composite materials with predictable stable characteristics, Mater. Sci., 2013, vol. 48, no. 5, pp. 591–600.CrossRefGoogle Scholar
  2. 2.
    Bondarenko, N.A., Zhukovsky, A.N., and Mechnik, V.A., Analysis of the basic theories of sintering materials. 1. Sintering under isothermal and nonisothermal conditions (A review), J. Superhard Mater., 2005, vol. 27, no. 6, pp. 3–17.Google Scholar
  3. 3.
    Mechnik, V.A., Production of diamond-(Fe–Cu–Ni–Sn) composites with high wear resistance, Powder Metall. Met. Ceram., 2014, vol. 52, no. 9, pp. 577–587.CrossRefGoogle Scholar
  4. 4.
    Bondarenko, M.O., Mechnik, V.A., and Suprun, M.V., Special features of the shrinkage and its rate in the Cdiamond–Fe–Cu–Ni–Sn–CrB2 system during hot pressing of presureess-sintered compacts, J. Superhard Mater., 2009, vol. 31, no. 4, pp. 232–240.CrossRefGoogle Scholar
  5. 5.
    Mechnik, V.A., Bondarenko, N.A., Kuzin, N.O., and Lyashenko, B.A., The role of the structure formation in forming the physicomechanical properties of composites of the diamond–(Fe–Cu–Ni–Sn) system, J. Frict. Wear, 2016, vol. 37, no. 4, pp. 377–384.CrossRefGoogle Scholar
  6. 6.
    Kolodnits’kyi, V.M. and Bagirov, O.E., On the structure formation of dimond-containing composites used in drilling and stone-working tools (A review), J. Superhard Mater., 2017, vol. 39, no. 1, pp. 1–17.CrossRefGoogle Scholar
  7. 7.
    Gevorkyan, E., Mechnik, Y, Bondarenko, N., Vovk, R., Lytovchenko, S., Chishkala, V., and Melnik, O., Peculiarities of obtaining diamond–(Fe–Cu–Ni–Sn) composite materials by hot pressing, Funct. Mater., 2017, vol. 24, no. 1, pp. 31–45.CrossRefGoogle Scholar
  8. 8.
    Novikov, M.V., Mechnyk, V.A., Bondarenko, M.O., Lyashenko, B.A., and Kuzin, M.O., Composite materials of diamond–(Co–Cu–Sn) system with improved mechanical characteristics. Part 1. The influence of hot re-pressing on the structure and properties of diamond–(Co–Cu–Sn) composite, J. Superhard Mater., 2015, vol. 37, no. 6, pp. 402–416.CrossRefGoogle Scholar
  9. 9.
    Aleksandrov, V.A., Alekseenko, N.A., and Mechnik, V.A., Investigation of force and energy parameters of the cutting granite with diamond disk saws, Sov. J. Superhard Mater., 1984, vol. 6, no. 6, pp. 35–39.Google Scholar
  10. 10.
    Dutka, V.A., Kolodnitskij, V.M., Mel’nychuk, O.V., and Zabolotnyj, S.D. Mathematical model for thermal processes occurring in the interaction between rock destruction elements of drilling bits and rock mass, Sverkhtverdye Materialy, 2005, vol. 27, no. 1, pp. 67–77.Google Scholar
  11. 11.
    Aleksandrov, V.A. and Mechnik, V.A., The effect of diamond heat conductivity and heat transfer coefficient upon contact temperature and wear of cutting discs, J. Frict. Wear, 1993, vol. 14, no. 6, pp. 1115–1117.Google Scholar
  12. 12.
    Aleksandro, V.A., Zhukovsky, A.N., and Mechnik, V.A., Temperature and wear of inhomogeneous diamond wheel under convective heat transfer. Part 1, J. Frict. Wear, 1994, vol. 15, no. 1, pp. 27–35.Google Scholar
  13. 13.
    Zhukovskii, A.N., Maistrenko, A.L., Mechnik, V.A., and Bondarenko, N.A., The stress-strain state of the bonding around the diamond grain exposed to normal and tangent loading components. Part 1. Model, J. Frict. Wear, 2002, vol. 23, no. 3, pp. 146–153.Google Scholar
  14. 14.
    Zhukovskii, A.N., Maistrenko, A.L., Mechnik, V.A., and Bondarenko, N.A., Stress-strain state of the matrix around the diamond grain exposed to the normal and tangent loading components. Part 2. Analysis, J. Frict. Wear, 2002, vol. 23, no. 4, pp. 393–396.Google Scholar
  15. 15.
    Sveshnikov, I.A. and Kolodnitsky, V.N., Optimization of the hard alloy cutter arrangement in the drilling bit body, Sverkhtverdye Materialy, 2006, vol. 28, no 4, pp. 70–75.Google Scholar
  16. 16.
    Xie, D.L, Wan, L, Song, D.D, Qin, H., Pan, X., Lin, F., and Fang, X., Low-temperature sintering of FeCoCu based pre-alloyed powder for diamond bits. J. Wuhan Univ. Technol. Mater. Sci., 2016, vol. 31, no 5, pp. 805–810.CrossRefGoogle Scholar
  17. 17.
    Hsieh, Y.Z and Lin, S.T., Diamond tool bits with iron alloys as the binding matrices. Mater. Chem. Phys., 2001, vol. 72, no. 2, pp. 121–125.CrossRefGoogle Scholar
  18. 18.
    Oliveira, L.J., Use of PM Fe–Cu–SiC composites as bonding matrix for diamond tools, Powder. Metall., 2007, vol. 50, no. 2, pp. 148–152.CrossRefGoogle Scholar
  19. 19.
    Sun, Y.X., Tsai, Y.T., and Lin, K.K. The influence of sintering parameters on the mechanical properties of vitrified bond diamond tools, Mater. Des., 2015, vol. 80, no. 5, pp. 89–98.CrossRefGoogle Scholar
  20. 20.
    Palumbo, M., Curiotto, S., and Battezzati, L.A., Thermodynamic analysis of the stable and metastable Co–Cu and Co–Cu–Fe phase diagrams, Calphad, 2006, vol. 30, no. 2, pp. 171–178.CrossRefGoogle Scholar
  21. 21.
    Shao, W.Q., Chen, S.O., Li, D., Cao, H.S., Zhang, Y.C., and Ge, X.H., Prediction of densification during low heating rate sintering of microcrystalline alumina ceramics based on master sintering curve theory, Mater. Proc. Report, 2008, vol. 23, no. 1, pp. 19–22.Google Scholar

Copyright information

© Allerton Press, Inc. 2019

Authors and Affiliations

  • Delong Xie
    • 1
    Email author
  • Haiqing Qin
    • 1
  • Feng Lin
    • 1
  • Xiaoyi Pan
    • 1
  • Chao Chen
    • 1
  • Leyin Xiao
    • 1
  • Jiarong Chen
    • 1
  • Peicheng Mo
    • 1
  1. 1.Guangxi Key Laboratory of Superhard Materials, Chinese National Engineering Research Center for Special Mineral MaterialsChina Nonferrous Metal (Guilin) Geology and Mining Co., LtdGuilinChina

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