Patent ID: 8426765

Claim:
A method for welding a workpiece of high-temperature superalloy, comprising: applying a welding filler to a workpiece surface by a heat input zone; supplying the welding filler into the heat input zone by a supply zone; moving the heat input zone and the supply zone in relation to the workpiece surface; and choosing a welding parameter so that a cooling rate during solidifying is at least 8000 Kelvins per second, wherein the workpiece comprises a γ′-containing nickel-based superalloy and the welding filler is a γ′-forming nickel-based superalloy material, wherein the welding parameter is selected from the group consisting of: a welding power, speed of a welding process, and a diameter of the heat input zone, wherein the speed of the welding process is at least 250 mm/min, wherein a welding beam comprising a laser is applied on the workpiece surface to produce the heat input zone, wherein a laser power is selected in a range of 100 W to 300 W, and wherein a diameter of a laser beam is 500 μm to 800 μm.