The localised heat inputof the laser beam results to minimal diffusion of heat from the welded to neighbouring regions. Therefore, laser cladding is ideal for processing parts were only local treatment is necessary. Rotors with integrated machinery either impossible or difficult to detach, are good examples where local processing capability is advantageous. In such cases, the heat of the process should be minimised so as not to affect neighbouring regions and to minimise distortions of the shaft where minimum machining is possible. Parts included in this category are:
Turborotors
Generator rotors
Gear shafts
Camshafts
Crosshead pins
The advantages of the technique are summarised below:
Local treatment possible without thermally affecting neighbouring regions
No sputtering which can damage highly sensitive surfaces
Zero distortions possible
Salvaging of parts which were otherwise scrapped
Extended life of repaired components through the use of high alloy materials with special properties
An expensive part can be repaired in a cost efficient manner