Owing to suffering from drastic friction, high thermal load and large brake force, brake disc in drilling rig has three failure forms as following: high temperature oxidation, wear failure due to over-load brake and thermal fatigue crack. Thermal spraying and surfacing are often applied to strengthen or repair the surface of brake disc, which has great limitation.
5kW laser with CO2 flow transverse was used for cladding Fe-based alloy and Fe/Cr3C2 powder on 35CrMo steel surface. The microstruc...