Microstructure and Mechanical Properties of the ((CoCrFeNi)95Nb5)100?xMox High-Entropy Alloy Coating Fabricated under Different Laser Power

In this paper, the ((CoCrFeNi)95Nb5)100?xMox (x = 1, 1.5 and 2) high-entropy alloy (HEA) coatings were fabricated on substrate of 45# steel by laser cladding process under different beam power. The influence power molybdenum element content microstructure microhardness HEA was investigated. Results show that composed face-centered cubic (FCC) phase Laves phase, had low porosity, bonded well to substrate. Mo1 coating is cellular dendritic structures columnar structures. With increase content, disappeared, grains are refined, arrangement more compact. volume fraction interdendritic 800 W small irregular. After increased 1000 W, increased. Under 1200 again. Therefore, a larger higher microhardness. in grain changed from dendrite dendrite, characteristics process, formation fine strengthening lead high coatings.