Dissolution of Tungsten Carbide in Remanufacturing Coating by Plasma Spray Welding

Xiao Dong Du; Lian Ying Li; Guang Fu Liu; Jian Shen; Dan Zhou

doi:10.4028/www.scientific.net/AMR.852.121

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 852Dissolution of Tungsten Carbide in Remanufacturing...

Dissolution of Tungsten Carbide in Remanufacturing Coating by Plasma Spray Welding

Abstract:

The tungsten carbide reinforced Ni-based alloy composite coatings are prepared on the surface of 45 steel by plasma spray welding in back feeding method. The dissolution of Ni-based WC composite coatings was investigated. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy diffraction spectrum (EDS) were used to examine the microstructure and composition of the coatings. The results show that the WC particles are well-distributed in the matrix. The WC particles have a good wettability with Ni-based substrate. In the spraying process, the WC particles have been dissolved obviously, and the diffusion occurs between the WC particles and Ni-based substrate. The surface of the coatings has a microstructure consisting of WC, W2C, Fe7C3, Cr7C3 and γ- (Fe, Ni) solid solution. The hardness increases from the matrix to the surface of coatings and is up to 2311 HV.

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Periodical:

Advanced Materials Research (Volume 852)

Pages:

121-126

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.852.121

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Online since:

January 2014

Authors:

Xiao Dong Du, Lian Ying Li, Guang Fu Liu, Jian Shen, Dan Zhou

Keywords:

Composite, Dissolution, Matrix, Plasma Spraying, WC Particles Reinforced

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