Characterization and <i>in-situ</i> 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

doi:10.1007/s12613-018-1589-4

Volume 25 Issue 4

Apr. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(4): 439-443

Mi-qi Wang, Ze-hua Zhou, Lin-tao Wu, Ying Ding, and Ze-hua Wang, Characterization and in-situ formation mechanism of tungsten carbide reinforced Fe-based alloy coating by plasma cladding, Int. J. Miner. Metall. Mater., 25(2018), No. 4, pp. 439-443. https://doi.org/10.1007/s12613-018-1589-4

Cite this article as:

Mi-qi Wang, Ze-hua Zhou, Lin-tao Wu, Ying Ding, and Ze-hua Wang, Characterization and in-situ formation mechanism of tungsten carbide reinforced Fe-based alloy coating by plasma cladding, Int. J. Miner. Metall. Mater., 25(2018), No. 4, pp. 439-443. https://doi.org/10.1007/s12613-018-1589-4

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Research Article

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

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Corresponding author:
Mi-qi Wang E-mail: wangmiqihhu@163.com
Received: 24 September 2017; Revised: 24 October 2017; Accepted: 27 October 2017

Abstract

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 M₃C 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+M₃C.
- precursor carbonization;
- tungsten carbide (WC);
- microstructure;
- in-situ formation mechanism;
- phase evolution

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