The present application relates to the technical field of
welding, in particular to a
cobalt-based
filler metal, a preparation method and application thereof, the
chemical composition of the
cobalt-based
filler metal comprises Co: 50-70%, Cr: 5-15%, Ni: 6-15%, W: 3-4%, and Zr: 10-30% by
mass percentage; the preparation steps comprise weighing the corresponding
metal elements according to the above
chemical composition, inductive
smelting at a temperature of 1500-1600 DEG C, and powdering. The
cobalt-based
filler metal or the cobalt-based filler
metal prepared by the above preparation method has excellent fluidity and wettability and low brittle
phase formation tendency, has extremely strong versatility, and the use of the filler
metal can obtain uniform welds and perfect filling, the high-temperature performance can meet the use requirements of active parts, and can be applied to repairing surface damage of cobalt-based material workpieces.