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Microstructure and properties of WC-based coating reinforced by Fe-based amorphous alloys
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The key lab of Guangdong for Modern Surface Engineering Technology,National Engineering Laboratory for Modern Materials Surface Engineering Technology,Guangdong Institute of New Materials

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    Abstract:

    WC-CoCr/ Fe-based amorphous alloy composite coating has been prepared by high velocity oxygen fuel (HVOF) spraying. Microstructure, hardness, wear resistance, high temperature oxidation and corrosion resistance of the composite coating are comparatively studied with WC-CoCr coating. XRD analysis and SEM observation show that the composite coating is mainly composed of WC, W2C and a Fe-based amorphous phase. In comparison with WC-CoCr coating, the hardness of the composite coating is slightly decreased, but there is no statistically significant difference between them. As a result of hardness decrease, the wear resistance of the composite coating is a little bit inferior to that of the WC-CoCr coating. Results of high temperature oxidation at 800 oC proved that the composite coating exhibits excellent thermal stability, which is mainly attributed to the formation of a dense and uniform oxide layer during the high temperature oxidation test. Moreover, electrochemical test revealed that the corrosion resistance of the composite coating is better than that of WC-CoCr coating in 3.5 wt.% NaCl solution.

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[Xu Liping, Song Jinbing, Deng Changguang, Liu Min, Zhou Kesong. Microstructure and properties of WC-based coating reinforced by Fe-based amorphous alloys[J]. Rare Metal Materials and Engineering,2020,49(5):1546~1552.]
DOI:10.12442/j. issn.1002-185X.20181278

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History
  • Received:December 22,2018
  • Revised:April 09,2019
  • Adopted:April 10,2019
  • Online: June 05,2020
  • Published: