Microstructure and mechanical performance of TiC-Inconel825 composite coating deposited on AISI 304 steel by TIG cladding process

TiC reinforced Inconel825 based hard and wear resistance composite coating was fabricated on AISI 304 steel by TIG cladding process utilizing in-house prepared Inconel825 powder from the discarded chip of turning operation and commercial TiC powder. The proposed coatings have inordinate potential applications, where resistance against wear and corrosion are the foremost requirement. The TiC concentration, preplaced layer thickness and processing current have shown significant influence on the microstructure and mechanical performance of the coating. Owing to the superior wetting behavior of the Ni-based alloy with TiC, and formation of intermediated phases excellent bond between the TiC particles and Inconel825 matrix was achieved. The micro-hardness value of the coating reached upto 1100 HV0.05, and the sliding abrasive wear against alumina abrasive disc reduced more than seven times as compared to the substrate.