Laser Metal Deposition in hot gas path manufacturing and repair

Product information

Dr. Bernd Burbaum, bernd.burbaum@siemens-energy.com, Siemens Energy; Dr. Torsten Jockisch, torsten.jokisch@siemens-energy.com, Siemens Energy; Nikolay Doynov

https://doi.org/10.53192/ITSC2026518

Siemens Energy provides customers with a reliable repair service for hot gas path components in turbines. Highly advanced welding processes are used routinely to repair gas turbine parts. Particular care is required when repairing combustion parts made of cobalt- and nickel-based superalloys, as they are highly susceptible to hot cracking and distortion during welding and post-weld heat treatment. Successful repairs require special technological expertise, including the use of ductile filler materials, low-heat-input welding methods, and welding at elevated temperatures, as well as complicated pre- and post-weld heat treatments, to avoid cracking in the weld. Two advanced welding techniques used for repair and additive manufacturing, particularly in hot gas combustion components, are Laser Metal Deposition (LMD) and Cold Metal Transfer (CMT). The LMD process uses a high-energy laser beam to melt metal powder or wire, resulting in a very small heat-affected zone, whereas the CMT process operates at lower temperatures than traditional welding methods. This paper provides a comparative overview of repairing the hot gas path component transition using LMD and CMT, considering process temperature, material feed, deposition rate and heat-affected zone (HAZ).

Reihe

PDF-Download zu https://doi.org/10.53192/ITSC2026518

Erscheinungsdatum

March 2026

Bindung

PDF Download