On the effectiveness of multi-component laser modifying of Fe-based self-fluxing coating with hard particulates

Abstract In the present paper, the influence of laser remelting parameters and laser modifying with B 4 C, MoB and TaB particulates on the structure, phases, microhardness and wear rates of Fe-based self-fluxing alloy coatings is studied. The laser spot speed, diameter and beam overlap factor influence the changes of alloy structures and composition. The presence of alloyed α-Fe and γ-Fe and a lot of hard inclusions, such as FeB, MoB, TaB and CrB, Fe 3 C, VC, Cr 3 C 2 and B 4 C, was revealed. Laser alloying with add-in reinforced B 4 C, MoB and TaB particulates affects the structure and phases composition of the coating significantly. These changes affect the microhardness and wear rate of the coatings.