NiCoCrAlY clad coating on the GH140 alloy surface was remelted by lase
r. The studies show that selecting proper laser remelting parameters c
an refine the structure in the remelted zone, increase the density of
coating, strengthen the interfacial bonding and, moreover, hardly dilu
te the alloying elements in the laser remelting zone. As a result, the
resistance of the coating against the corrosion and thermal cycles is
significantly increased. Also, the good plasticity of the original co
ating remains.