Abstract:
FeNiCoCrTi
0.5 coatings with different process parameters were fabricated by laser cladding. The macro-morphology, phase, microstructure, hardness, and wear resistance of each coating were studied. The smoothness and dilution rate of the FeNiCoCrTi
0.5 coating generally increased with the increase of specific energy (
Es), which is the laser irradiation energy received by a unit area. FeNiCoCrTi
0.5 coatings at different parameters had bcc, fcc, and Ti-rich phases as well as equiaxed, dendritic, and columnar structures. When
Es increased, the size of each structure increased and the distribution area of the columnar and dendritic structures changed. The prepared FeNiCoCrTi
0.5 coating with the
Es of 72.22 J·mm
–2 had the highest hardness and the best wear resistance, the highest hardness of the coating reached HV 498.37, which is twice the substrate hardness. The average hardness of the FeNiCoCrTi
0.5 coating with the
Es of 72.22 J·mm
–2 was 15.8% higher than the lowest average hardness of the coating with the
Es of 108.33 J·mm
–2. The worn surface morphologies indicate that the FeNiCoCrTi
0.5 coatings exhibited abrasive wear.