Stellite-6/(WC+TiC) Composite Coatings Produced by Laser Alloying on S355 Steel
Dariusz Bartkowski, Aneta Bartkowska, Joanna Isabelle Olszewska, Damian Przestacki, Dariusz Ulbrich
Abstract
The paper presents study results of Stellite-6/(WC+TiC) coatings produced by laser alloying with varying contents of reinforcing phases (40%wt and 60%wt content of mixture WC+TiC). The coatings were produced on S355 steel using different laser beam power densities: 76 kW/cm2, 115 kW/cm2 and 153 kW/cm2. The coatings obtained were subjected to microhardness measurements, wear resistance tests, chemical composition analysis and microstructure observations using light microscopy and scanning electron microscopy. It was found that both types of coatings were characterized by higher microhardness and wear resistance in comparison to substrate material. The rate of solidification had an impact on the obtained results of the study.