Characterization and sliding wear behavior of CoMoCrSi+Flyash composite cladding processed by microwave irradiation

Abstract

The present work deals with the development of CoMoCrSi+Flyash composite cladding on AISI 410 steel substrate using a domestic microwave oven with cladding process parameters of frequency 2.45GHz, with the power of 900W and processing time is 1800s. The developed clad is characterized by metallographic and mechanical properties. Further, the substrate and cladding samples are tested for high-temperature sliding wear behaviour using a pin on disc apparatus. The clad specimen exhibits partial melting of particles and observed uniformity in thickness. X-Ray Diffraction analysis shows the presence of Cr<inf>3</inf>C<inf>2</inf>, Co<inf>3</inf>Ti, TiC, SiC, and Mo<inf>3</inf>Si hard phases that are formed during the cladding process, while excellent metallurgical bonding can be observed which provides improved hardness. The addition of flyash into the cobalt-base matrix enhanced high-temperature strength results in better wear resistance due to the formation of oxide layers. © 2021 Elsevier Ltd. All rights reserved.