Microstructure and Wear Resistance of ZrC Reinforced Metal Matrix Composite Coating by Gas Tungsten Arc Cladding

Abstract:

The in situ synthesized ZrC particulate reinforced metal matrix composite coating was fabricated on AISI1020 steel by gas tungsten arc (GTA) cladding powder mixture of Nickel, Zirconium and Graphite. The microstructure and wear resistance of the composite coating were investigated. It is shown that the coating is bonded metallurgically to the substrate and has a homogeneous fine microstructure containing both approximate cubic ZrC particle uniformly dispersed in matrix of (Fe,Ni) solid solution. Compared to a substruate, the hardness of the composite coating was increased by a factor of 6, could achieve a Vicker microhardness of HV_0.21100. And the wear resistance in a block on ring test against YG8 was increased by a factor of 10. This is attributed to the presence of in situ synthesized ZrC particles and their well distribution in the coating.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 2113-2116
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.2113
• Online since: August 2013
• Authors: Zhen Ting Wang, Jing Xin Fan
• Keywords: Gas Tungsten Arc Cladding, In Situ Synthesis, Microstructure, Wear Resistance, ZrC

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