Laser direct energy deposition, alternatively known as laser metal deposition (LMD) or neat net shape, is an AM process which uses a high-power laser beam, connected to a robot or gantry system, to form a melt pool on a metallic substrate into which powder or metal wire is fed. We supply gaseous or liquid helium, argon and nitrogen systems to assist with laser direct energy deposition processes.
The laser DED process
In laser DED processes, the powder is contained in a carrier gas and blown towards the substrate through a nozzle that is concentric with the laser beam. The laser beam anneals the powder particles before they hit the substrate and fuses them to form the component layer by layer. A second gas jet is often used to shield the annealed area against atmospheric gases, especially when higher deposition rates are required. This method is suitable for larger components that rely on higher deposition rates. Laser DED is used for a wide range of applications including cladding and repair carried out for example as a mold-to-surface application for high-value parts such as aerospace engine components and military equipment.
Best process gases for laser DED processes
- High-purity argon, nitrogen and helium
- LASGON® bespoke laser process gas solutions
Note: hydrocarbons and moisture must be avoided.
Linde solutions for laser DED processes
- Argon, helium, nitrogen gas supply – design, provision and installation
- Active gas supply – gases mixed in advance or on site to meet specific process demands
- On-site support – process and/or technical support
- On-stream gas system – design and maintenance services
- Gas safety – equipment, safety checks and training