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

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Abstract:

TiC reinforced Fe-based composite coating with 10% and 20% TiC particle were prepared on the surface of substrate Q235 steel by plasma cladding, respectively. The microstructure and formation mechanism of cladding layer were carefully investigated by SEM, EDS and XRD. The results show that metallurgical combination is achieved between coating and substrate, the microstructure of composite coating is composed of dendrite α-Fe, interdendritic eutectic structure (α-Fe, Cr23C6 and CrB) and added TiC particles, and microstructure refinement with the increase of TiC particles content. TiC particles react with Fe-based alloy and part of TiC particles dissolve into coating. The hardness of composite coating has a relationship with TiC particles content and TiC particles distribution, and hardness increase with the increase of TiC particles content. The maximum value of composite coating hardness is 545 HV0.2 and 719 HV0.2, respectively. The major strengthening mechanism is fine-grain strengthening, solid solution strengthening and dispersion strengthening.

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Advanced Manufacturing Technology, ICMSE 2012 View Preview

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Periodical:

Advanced Materials Research (Volumes 472-475)

Pages:

297-301

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.472-475.297

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Online since:

February 2012

Authors:

Jin Bin Lu, Pu Meng, Feng Tang, Jin Xia Gong, Bin Zhao

Keywords:

Composite Coating, Plasma Cladding, TiC

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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