LASER WELDING OF NICKEL-BASED SUPERALLOYS

摘要

In order to obtain crack-free, homogeneous welds in nickel-based superalloys, laser parameters in respect of the power, the beam diameter, the mass feed rate, and the speed of advancement, are specifically selected.

主权项

1. A laser build-up welding process for a substrate of a nickel-based superalloys,
using a laser which generates a laser beam having a diameter (d) of the laser beam with a diameter of 300 μm to 400 μm, the process comprising:
feeding a welding powder at a mass feed rate between 360 mg/min and 450 mg/min,optionally at least one of setting the laser power between 80 watts and 120 watts; andsetting the speed of movement between the substrate and the laser beam at 450 mm/min to 550 mm/min;and displacing by an amount of 200 μm to 250 μm in a welding layer plane, in order to produce a directly adjacent welding track, for thereby producing a plurality of the welding tracks arranged alongside one another for producing a welding layer.