Influence of Heat Treatment on the Microstructure and Wear Properties of Arc-Sprayed FeCrAl/Al Coating

Intermetallic compounds formed during heat treatment of alloy coatings affect the coating structure and properties. In order to determine phase changes performance, FeCrAl (Fe Bal., Cr 26 wt.%, Al 6 wt.%) (99.9 was sprayed onto low carbon steel substrates subsequently heat-treated at different temperatures. The effects on microstructure, composition, tensile bonding strength, microhardness, wear properties were analyzed. as-sprayed had a dense, layered with an average porosity 3.6%. microhardness comprised hard splats ductile value 494 HV0.1. 300 °C highest strength 37.5 MPa. At 500 °C, FeAl intermetallic boundaries due diffusion elements. resistance affected by uniform precipitation compounds. Compared annealed coatings, lowest rate.