Microstructure Analysis of TiC Reinforced Ni-Based Composite Coating by Plasma Cladding

Abstract:

TiC reinforced Ni-based composite coating added with 10% TiC and 20% TiC particles were prepared on the surface of Q235 steel by plasma cladding, respectively. SEM as well as EDS and XRD were used to investigate the microstructure and formation mechanism of composite coating. The results show that between composite coating and substrate is metallurgical combination, and the microstructure of composite coating is composed of basic microstructure dendrite γ-Ni, interdendritic eutectic structure (α-Fe+Cr23C6+CrB) and dispersed TiC particle. Part of TiC particles melt when the composite coating added with 10% TiC particles, in the composite coating added with 20% TiC particles, part of TiC particles precipitate after dissolution. TiC particles have a uniform distribution with the size 3~5µm. The maximum value of micro-hardness of composite coating added with 10% TiC and 20% TiC particle is 460 HV0.2 and 620 HV0.2, respectively.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 286-289
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.286
• Online since: June 2012
• Authors: Jin Xia Gong, Jin Bin Lu, Ying Liu
• Keywords: Microstructure, Ni-Cr-B-Si, Plasma Cladding, TiC

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