SEM mi-crostructure of coatings-substrate has been reported, and an EDX-researched chemical composition of the coatings was compared to the nominal chemical composition. ![]() In the next step, the surface of the deposited coating was remelted by means of TIG (Tungsten Inert Gas) welding method. In this study, four protective coating materials: Inconel 718, Inconel 625, Alloy 33 and Stellite 6 were deposited on 16Mo3 steel tubes by means of CMT (Cold Metal Transfer), as an advanced version of MAG (Metal Active Gas) welding method. ![]() Microhardness distribution of the investigated annealed coatings has been presented. Phase structure evolution of the Fe-Al arc-sprayed coating, stimulated by annealing, has been described by means of SEM images taken with a QBSD backscattered electron detector and by XRD and conversion electron Mössbauer spectroscopy (CEMS) investigations. In the next step, participation of FexAly fraction was increased through the annealing process, with three temperature values, 700 ☌, 800 ☌, and 900 ☌. Initially, synthesis of intermetallic phases took place in situ during the spraying process. The aim of the research was to reach protective coatings with a composite structure consisting of a significant participation of FexAly as intermetallic phases reinforcement. The arc spraying process was carried out by simultaneously melting two different electrode wires, aluminum and low alloy steel (98.6 wt.% of Fe). ![]() The article presents the results of research on the structural evolution of the composite Fe-Al-based coating deposited by arc spray with initial low participation of in situ intermetallic phases.
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