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

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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.

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Acknowledgements

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

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Authors and Affiliations

  1. College of mechanics and materials, Hohai University, Nanjing, 211100, China

    Mi-qi Wang, Ze-hua Zhou, Lin-tao Wu, Ying Ding & Ze-hua Wang

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  1. Mi-qi Wang
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  2. Ze-hua Zhou
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Correspondence to Mi-qi Wang.

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Wang, Mq., Zhou, Zh., Wu, Lt. et al. Characterization and in-situ formation mechanism of tungsten carbide reinforced Fe-based alloy coating by plasma cladding. Int J Miner Metall Mater 25, 439–443 (2018). https://doi.org/10.1007/s12613-018-1589-4

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  • DOI: https://doi.org/10.1007/s12613-018-1589-4

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