Coaxial Laser Cladding of Cobalt-Base Alloy Stellite™ 6 on Grey Cast Iron Analysis of the Microstructural and Mechanical Properties Depending on the Laser Power

Abstract A high-power diode laser was used to generate single- and multi-bead coatings of Stellite™ 6 by coaxial cladding over flat grey cast iron (EN-GJLP-200) as a preliminary study develop wear corrosion resistant coating for brake disks on cost-effective substrate. In this article, we have focused detailed quantitative analysis the effect different powers (1.5, 2.0, 2.5, 3.0, 3.5, 4.0 kW) bead geometry, dilution, microstructure, hardness. Coatings dilution or composition depends directly power well geometry. The typical microstructure comprises solid solution α (hcp)- β (fcc)-Co with dendritic structure metal matrix an interdendritic lamellar eutectic, which contains predominantly β-Co, chromium carbides Cr 7 C 3 23 blocky tungsten carbide W 2 C. Coating hardness chemical that is modified deposition parameters. Low results in high fraction most refined microstructures, accounting harder coatings.