Abstract
Nanostructured materials are known for enhanced properties as compared to their conventional counterparts. In the present work, microwave cladding technique was explored for depositing nanostructured WC–12Co clads on stainless steel substrates. Phase analysis of the WC–12Co microwave clads revealed the presence of Co6W6C, Co7W6, Co3W9C4, W2C and WC phases. The microstructure of the WC–12Co clads confirmed uniform distribution of nano-carbides in the form of clusters enclosed in the carbide network. Mechanical characterisation of the nanostructured clads was carried in terms of microhardness assessment and flexural strength measurement. The microwave induced clads exhibited excellent metallurgical bonding with the substrate and were free from interfacial cracks. The average microhardness of the developed clads was found in the order of 1760±128HV. The flexural strength of the developed clads was observed to be 671±28MPa. The nanostructured clads exhibited good adhesion with the substrate without getting peeled-off under a load of 3.75kN and a displacement of 3.72mm.
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