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Laser-based solutions for component repair

A partnership with Actom’s Metalplus created the platform for demonstrating the use of fibre laser-welding technology in component repair, where conventional welding methods are not suitable for the repair process.

The partnership combines the CSIR’s expertise in laser cladding and hardening as part of its laser-based manufacturing capability, with the machining and grinding capability resident in Metalplus.

Laser welding technology is commonly used to repair components that have suffered surface damage or wear. The technology can also be used to improve the performance of components by changing their surface properties. The low heat input and low dilution of the laser-based process also makes it suitable for performing small-scale repairs and depositing fine layers of metal as weld overlays, which is beyond the scope of traditional welding systems. 

Contact Person

Delon Mudaly

Laser-based solution for component repair

Key Concept

The refurbishment welding technique
The first joint project between the CSIR and Metalplus was the refurbishment welding technique applied to the repair of a Sasol generator. A Sasol coil-retaining ring, which usually holds the generator field coil end windings, could not be held in position. Due to the segmented design of the rotor, circumferential welding was not a feasible approach. Therefore, near-net shape weld build-up of the individual sections was required. The laser metal deposition process was successful and the approach significantly reduced the total refurbishment time.