Characterization and in-situ formation mechanism of tungsten carbide reinforced Fe-based alloy coating by plasma cladding

  • Mi-qi Wang
  • Ze-hua Zhou
  • Lin-tao Wu
  • Ying Ding
  • Ze-hua Wang
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Abstract

The precursor carbonization method was first applied to prepare W–C compound powder to perform the in-situ synthesis of the WC phase in a Fe-based alloy coating. The in-situ formation mechanism during the cladding process is discussed in detail. The results reveal that fine and obtuse WC particles were successfully generated and distributed in Fe-based alloy coating via Fe/W–C compound powders. The WC particles were either surrounded by or were semi-enclosed in blocky M7C3 carbides. Moreover, net-like structures were confirmed as mixtures of M23C6 and α-Fe; these structures were transformed from M7C3. The coarse herringbone M6C carbides did not only derive from the decomposition of M7C3 but also partly originated from the chemical reaction at the α-Fe/M23C6 interface. During the cladding process, the phase evolution of the precipitated carbides was WC → M7C3 → M23C6 + M6C.

Keywords

precursor carbonization tungsten carbide (WC) microstructure in-situ formation mechanism phase evolution 
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Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51379070).

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Copyright information

© University of Science and Technology Beijing and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Mi-qi Wang
    • 1
  • Ze-hua Zhou
    • 1
  • Lin-tao Wu
    • 1
  • Ying Ding
    • 1
  • Ze-hua Wang
    • 1
  1. 1.College of mechanics and materialsHohai UniversityNanjingChina

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