LZH develops RoLaKI project for underwater laser 3D printing of steel structures. The Laser-Zentrum Hannover (LZH) has launched the RoLaKI project to enable in-situ repair of submerged steel components using robotic laser-based additive manufacturing. The research focuses on integrating AI-driven control systems to manage the complex thermal and environmental variables inherent in underwater Directed Energy Deposition (DED) processes. By utilizing robotic arms equipped with laser cladding heads, the project aims to automate the deposition of steel alloys directly onto underwater infrastructure, reducing the need for costly dry-docking or component extraction. The initiative represents a critical effort to extend the operational lifespan of maritime and offshore energy assets through localized, automated material restoration.

Underwater additive manufacturing addresses a significant maintenance gap in the maritime and offshore energy sectors, where traditional repair methods are logistically intensive and expensive. While current DED systems are optimized for controlled atmospheric environments, the RoLaKI project faces the challenge of maintaining metallurgical integrity and process stability in high-pressure, aqueous conditions. This development competes with conventional underwater welding techniques, which often lack the precision and material control offered by laser-based additive processes. As offshore wind and maritime infrastructure continue to age, the demand for reliable, autonomous underwater repair technologies is increasing, positioning this research at the intersection of robotics and industrial maintenance.

Successfully implementing this technology requires LZH to overcome extreme thermal gradients and water-induced porosity in the deposited steel layers. The primary technical hurdle remains the development of robust AI algorithms capable of real-time process monitoring and adjustment to ensure structural integrity in a non-inert environment. For industrial stakeholders, the focus should remain on the validation of mechanical properties of the printed steel compared to traditional welding standards. If successful, this technology offers a pathway to significantly reduce downtime for submerged assets by enabling on-site, robotic repair capabilities.