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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
  • 5 Downloads

Abstract

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.

Keywords

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

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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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